/* ─── Variables ─────────────────────────────────────────────── */
:root {
  --green:   #58CC02;
  --green-d: #46a302;
  --red:     #FF4B4B;
  --blue:    #1CB0F6;
  --gold:    #FFB020;
  --purple:  #CE82FF;
  --bg:    #0c1019;
  --bg2:   #11162a;
  --bg3:   #1a2040;
  --card:  #131830;
  --border: rgba(255,255,255,.07);
  --border2: rgba(255,255,255,.12);
  --text:  #e8eaf6;
  --text2: #9ba3c7;
  --text3: #6c7494;
  --radius: 14px;
  --shadow: 0 4px 24px rgba(0,0,0,.5);
  --trans: .18s ease;
}

/* ─── Dark theme explicit (JS sets data-theme="dark") ────────── */
html[data-theme="dark"] {
  --bg:    #0c1019;
  --bg2:   #11162a;
  --bg3:   #1a2040;
  --card:  #131830;
  --border: rgba(255,255,255,.07);
  --border2: rgba(255,255,255,.12);
  --text:  #e8eaf6;
  --text2: #9ba3c7;
  --text3: #6c7494;
  --radius: 14px;
  --shadow: 0 4px 24px rgba(0,0,0,.5);
  --trans: .18s ease;
}

/* ─── Light theme ────────────────────────────────────────────── */
html[data-theme="light"] {
  --bg:    #f5f7ff;
  --bg2:   #ffffff;
  --bg3:   #eef1ff;
  --card:  #ffffff;
  --border: #e1e6f5;
  --border2: #cbd3ed;
  --text:  #1a1d35;
  --text2: #6b74a8;
  --text3: #969cbb;
  --shadow: 0 4px 24px rgba(80,90,180,.1);
}

/* ─── Aurora theme (premium) ─────────────────────────────────── */
html[data-theme="aurora"] {
  --green:   #00d4aa;
  --green-d: #00a880;
  --blue:    #38c5ff;
  --purple:  #b47aff;
  --bg:      #060b14;
  --bg2:     #0b1525;
  --bg3:     #111e35;
  --card:    #0e1a2e;
  --border: rgba(26,58,88,.5);
  --border2: rgba(26,58,88,.9);
  --text:    #e2f0ff;
  --text2:   #7aadcc;
  --shadow:  0 4px 24px rgba(0,140,255,.2);
}
html[data-theme="aurora"] .btn-primary {
  background: linear-gradient(135deg, #00d4aa, #38c5ff);
  box-shadow: 0 4px 0 #007a66, 0 0 20px rgba(0,212,170,.25);
  color: #060b14;
}
html[data-theme="aurora"] .btn-primary:hover {
  background: linear-gradient(135deg, #00eabb, #55d4ff);
}
html[data-theme="aurora"] .btn-primary:active {
  box-shadow: 0 0 12px rgba(0,212,170,.2);
}
html[data-theme="aurora"] .lesson-progress-fill {
  background: linear-gradient(90deg, #00d4aa, #38c5ff);
}

/* ─── Custom theme ───────────────────────────────────────────── */
html[data-theme="custom"] {
  --bg:     var(--cust-bg,     #0c1019);
  --bg2:    var(--cust-bg2,    #11162a);
  --bg3:    var(--cust-bg3,    #1a2040);
  --card:   var(--cust-card,   #131830);
  --border: var(--cust-border, rgba(255,255,255,.06));
  --border2:var(--cust-border2,rgba(255,255,255,.1));
  --text:   var(--cust-text,   #e8eaf6);
  --text2:  var(--cust-text2,  #9ba3c7);
  --green:  var(--cust-green,  #58CC02);
  --green-d:var(--cust-green-d,#46a302);
}

/* ─── Theme Picker ───────────────────────────────────────────── */
.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 8px;
}
.theme-card {
  position: relative;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 8px 8px;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--trans), transform var(--trans), box-shadow var(--trans);
  background: var(--bg3);
}
.theme-card:hover { border-color: var(--blue); transform: translateY(-2px); }
.theme-card.active { border-color: var(--green); box-shadow: 0 0 0 1px var(--green); }
.theme-preview {
  width: 100%;
  height: 44px;
  border-radius: 8px;
  margin-bottom: 7px;
  border: 1px solid rgba(255,255,255,.08);
}
.theme-name {
  font-size: .78rem;
  font-weight: 700;
  color: var(--text);
  display: block;
}
.theme-premium-badge {
  position: absolute;
  top: -8px; right: -6px;
  background: linear-gradient(135deg, #FFB020, #ff6b00);
  color: #fff;
  font-size: .6rem;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 10px;
  letter-spacing: .02em;
  box-shadow: 0 2px 8px rgba(255,110,0,.4);
}

/* ─── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.noto-emoji body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Color Emoji", sans-serif;
}
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
input  { font: inherit; color: inherit; background: none; border: none; outline: none; }

/* ─── App container ─────────────────────────────────────────── */
#app { height: 100dvh; display: flex; flex-direction: column; overflow: hidden; }

/* ─── Screens ────────────────────────────────────────────────── */
.screen { display: none; flex-direction: column; flex: 1; overflow: hidden; min-height: 0; }
.screen.active { display: flex; }
/* Welcome screen inner area must scroll on small phones */
#screen-welcome > div { overflow-y: auto; }
@keyframes screenIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:translateY(0); } }

/* Suppress screen animation for child scroll containers */
.screen.active .course-map,
.screen.active .sett-content,
.screen.active .chat-panel-messages,
.screen.active .vocab-content { animation: none; }

#screen-videos { min-height: unset; height: 100dvh; overflow: hidden; }

/* ─── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ─── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius); font-size: 1rem; font-weight: 700;
  transition: transform var(--trans), box-shadow var(--trans), background var(--trans);
  user-select: none;
}
.btn:active { transform: scale(.96); }

.btn-primary { background: var(--green); color: #fff; box-shadow: 0 4px 0 var(--green-d); }
.btn-primary:hover { background: #62e002; transform: translateY(-1px); }
.btn-primary:active { box-shadow: none; transform: translateY(4px); }
.btn-primary:disabled { background: #3a3f5c; box-shadow: 0 4px 0 #2a2e44; color: var(--text2); }

.btn-secondary { background: var(--bg3); color: var(--text); border: 2px solid var(--border); }
.btn-secondary:hover { background: var(--border); }

.btn-danger { background: var(--red); color: #fff; box-shadow: 0 4px 0 #c93b3b; }
.btn-danger:active { box-shadow: none; transform: translateY(4px); }

.btn-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg3); font-size: 1.3rem;
  transition: background var(--trans);
}
.btn-icon:hover { background: var(--border); }

.btn-back {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .95rem; color: var(--text2); padding: 8px 0;
  transition: color var(--trans);
}
.btn-back:hover { color: var(--text); }

.btn-audio {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--blue); color: #fff; font-size: 1.2rem;
  display: flex; align-items: center; justify-content: center;
  transition: transform var(--trans), box-shadow var(--trans);
  box-shadow: 0 3px 0 #1490c4;
  flex-shrink: 0;
}
.btn-audio:hover { transform: scale(1.1); }
.btn-audio:active { transform: scale(.95); box-shadow: none; }

/* ─── Header ─────────────────────────────────────────────────── */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--bg2);
  border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10;
}
.header-stats { display: flex; gap: 10px; }
.stat-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px; border-radius: 18px; font-weight: 700; font-size: .85rem; line-height: 1;
}
.stat-badge.xp     { background: rgba(255,176,32,.12); border: 1px solid rgba(255,176,32,.25); color: var(--gold); }
.stat-badge.streak { background: rgba(255,75,75,.12);  border: 1px solid rgba(255,75,75,.25);  color: #ff7070; }

.screen-header {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 20px;
  background: var(--bg2);
}
.screen-header h2 { flex: 1; text-align: center; font-size: 1.1rem; font-weight: 700; }

/* ─── Welcome / Language Select ─────────────────────────────── */
#screen-welcome {
  align-items: center; justify-content: center;
  padding: 40px 20px;
  background: radial-gradient(ellipse at top, #1e2235 0%, var(--bg) 70%);
}
.welcome-logo { font-size: 4rem; margin-bottom: 8px; animation: pop .5s ease; }
.welcome-title { font-size: 2.2rem; font-weight: 800; text-align: center; margin-bottom: 8px; }
.welcome-title span { color: var(--green); }
.welcome-sub { color: var(--text2); font-size: 1.05rem; margin-bottom: 40px; text-align: center; }

.lang-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px;
  width: 100%; max-width: 400px;
}
.lang-card {
  position: relative;
  background: var(--card); border: 2px solid var(--border); border-radius: var(--radius);
  padding: 18px 8px 14px; display: flex; flex-direction: column; align-items: center; gap: 6px;
  cursor: pointer; text-align: center;
  transition: transform var(--trans), border-color var(--trans), box-shadow var(--trans);
}
.lang-card:hover  { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--green); }
.lang-card:active { transform: scale(.97); }
.lang-card .flag  { font-size: 2.6rem; line-height: 1; }
.lang-card .lang-info .lang-name   { font-weight: 700; font-size: .88rem; margin-top: 2px; }
.lang-card .lang-info .lang-native { font-size: .72rem; color: var(--text2); }

/* ─── XP badge pinned to top-right corner of card ───────────── */
.lang-card .lang-xp {
  position: absolute; top: 7px; right: 7px;
  display: inline-flex; align-items: center; gap: 2px;
  padding: 3px 7px; border-radius: 20px;
  background: rgba(255,176,32,.13); border: 1.5px solid rgba(255,176,32,.3);
  color: var(--gold); font-size: .62rem; font-weight: 800;
  line-height: 1; white-space: nowrap;
}

/* ─── Alphabet letter cards ──────────────────────────────────── */
.alpha-card-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
}
@media (min-width: 400px) { .alpha-card-grid { grid-template-columns: repeat(5, 1fr); } }
@media (min-width: 560px) { .alpha-card-grid { grid-template-columns: repeat(6, 1fr); } }
.alpha-card {
  background: var(--card); border: 1.5px solid var(--border);
  border-radius: 12px; padding: 10px 6px 7px;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  cursor: pointer; user-select: none;
  transition: border-color var(--trans), transform var(--trans), background var(--trans);
}
.alpha-card:hover  { border-color: var(--blue); transform: translateY(-2px); background: var(--bg3); }
.alpha-card:active { transform: scale(.93); background: rgba(28,176,246,.12); border-color: var(--blue); }
.alpha-card-letter {
  font-size: 1.45rem; font-weight: 800; line-height: 1; color: var(--text);
}
.alpha-card-name {
  font-size: .62rem; color: var(--text2); text-align: center;
  font-style: italic; line-height: 1.2;
}
.alpha-card-sound {
  font-size: .6rem; color: var(--blue); opacity: .7; margin-top: 1px;
}

.alpha-note {
  background: var(--bg3); border-radius: 12px; padding: 10px 14px;
  font-size: .82rem; color: var(--text2); margin-bottom: 16px; line-height: 1.5;
}
.alpha-section { margin-bottom: 24px; }
.alpha-section-title {
  font-weight: 800; font-size: .88rem; color: var(--blue);
  margin-bottom: 8px; text-transform: uppercase; letter-spacing: .05em;
}
.alpha-table { width: 100%; border-collapse: collapse; }
.alpha-table th {
  font-size: .72rem; color: var(--text2); font-weight: 600; padding: 4px 8px;
  border-bottom: 1px solid var(--border); text-align: left;
}
.alpha-table td {
  padding: 8px; border-bottom: 1px solid var(--border);
  font-size: .88rem; vertical-align: top;
}
.alpha-char { font-size: 1.4rem; font-weight: 800; color: var(--text1); }
.alpha-rom  { font-size: .88rem; font-weight: 700; color: var(--green); }
.alpha-ipa  { font-size: .8rem;  color: var(--blue); font-family: monospace; }
.alpha-hint { font-size: .78rem; color: var(--text2); }
.alpha-ex   { font-size: .78rem; color: var(--gold); font-style: italic; }

/* ─── Grammar screen ─────────────────────────────────────────── */
.gram-chapter-grid {
  display: flex; flex-direction: column; gap: 10px;
}
.gram-chapter-card {
  background: var(--card); border: 1.5px solid var(--border); border-radius: 14px;
  padding: 14px 16px; cursor: pointer; display: flex; align-items: center; gap: 12px;
  transition: border-color var(--trans), transform var(--trans);
}
.gram-chapter-card:hover { border-color: var(--green); transform: translateX(4px); }
.gram-chapter-icon { font-size: 1.6rem; }
.gram-chapter-info { flex: 1; }
.gram-chapter-title { font-weight: 700; font-size: .95rem; }
.gram-chapter-level { font-size: .72rem; color: var(--text2); margin-top: 2px; }
.gram-chapter-count { font-size: .72rem; color: var(--text2); white-space: nowrap; }

.gram-rule-card {
  background: var(--card); border-radius: 16px; padding: 20px;
  border: 1.5px solid var(--border); margin-bottom: 0;
}
.gram-rule-title {
  font-size: 1.1rem; font-weight: 800; color: var(--text1); margin-bottom: 10px;
  border-bottom: 2px solid var(--green); padding-bottom: 6px;
}
.gram-rule-body {
  font-size: .9rem; color: var(--text1); line-height: 1.7; margin-bottom: 14px;
}
.gram-rule-examples {
  display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px;
}
.gram-example {
  background: var(--bg3); border-radius: 10px; padding: 10px 14px;
  border-left: 3px solid var(--blue);
}
.gram-example-ex { font-size: .92rem; font-weight: 700; color: var(--text1); }
.gram-example-tr { font-size: .82rem; color: var(--text2); margin-top: 2px; }
.gram-tip {
  background: var(--bg3); border-radius: 10px; padding: 10px 14px;
  border-left: 3px solid var(--gold); font-size: .82rem; color: var(--text2);
}
.gram-tip::before { content: "💡 "; }
.gram-header { font-size: .82rem; color: var(--text2); margin-bottom: 12px; cursor: pointer; }
.gram-header:hover { color: var(--text1); }

/* ─── Course Map ─────────────────────────────────────────────── */
.course-map {
  flex: 1; overflow-y: auto; padding: 24px 20px;
  display: flex; flex-direction: column; gap: 16px;
}
.level-block { /* container only — no background/border to avoid rect-inside-rounded */ }
.level-header {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; cursor: pointer;
  background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
  transition: background var(--trans);
}
.level-block.open .level-header { border-radius: var(--radius) var(--radius) 0 0; border-bottom-color: transparent; }
.level-header:hover { background: rgba(255,255,255,.04); }
.level-badge {
  padding: 3px 10px; border-radius: 20px; font-size: .7rem; font-weight: 800;
  background: var(--green); color: #fff; letter-spacing: .5px;
}
.level-badge.locked { background: var(--bg2); color: var(--text3); border: 1px solid var(--border); }
.level-name { font-weight: 700; flex: 1; font-size: .95rem; }
.level-xp   { font-size: .78rem; color: var(--text3); }
.level-arrow { color: var(--text3); transition: transform var(--trans); font-size: .85rem; }
.level-block.open .level-arrow { transform: rotate(90deg); }

.topics-list {
  display: none; padding: 10px 12px 14px;
  grid-template-columns: repeat(3, 1fr); gap: 8px;
  border: 1px solid var(--border); border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
}
.level-block.open .topics-list { display: grid; }

/* Topic card */
.topic-card {
  background: var(--bg3); border: 1.5px solid var(--border); border-radius: 14px;
  padding: 14px 6px 10px; display: flex; flex-direction: column;
  align-items: center; gap: 5px; text-align: center; cursor: pointer;
  transition: all var(--trans);
}
.topic-card:not(.locked):hover { border-color: var(--green); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(88,204,2,.12); }
.topic-card:active { transform: scale(.97); }
.topic-card.done { border-color: rgba(88,204,2,.4); background: rgba(88,204,2,.06); }
.topic-card.locked { opacity: .4; cursor: not-allowed; }
.topic-card.locked:hover { transform: none; }
.tc-icon { font-size: 1.9rem; line-height: 1; }
.tc-name { font-size: .72rem; font-weight: 600; color: var(--text); line-height: 1.3; word-break: break-word; }
.tc-stars { display: flex; gap: 1px; font-size: .75rem; }

.progress-ring-wrap { width: 36px; height: 36px; flex-shrink: 0; }
.progress-ring { transform: rotate(-90deg); }
.ring-bg   { fill: none; stroke: var(--border); stroke-width: 3; }
.ring-fill { fill: none; stroke: var(--green);  stroke-width: 3;
             stroke-linecap: round; transition: stroke-dashoffset .5s ease; }

/* ─── Lesson Header ──────────────────────────────────────────── */
.lesson-topbar {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 20px; background: var(--bg2); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.lesson-progress-bar {
  flex: 1; height: 10px; background: var(--border); border-radius: 5px; overflow: hidden;
}
.lesson-progress-fill { height: 100%; background: var(--green); border-radius: 5px; transition: width .4s ease; }
.hearts-row { display: flex; gap: 4px; font-size: 1.1rem; }

/* ─── Exercise Container ─────────────────────────────────────── */
.exercise-wrap {
  display: flex; flex-direction: column;
  align-items: center; padding: 24px 20px;
  max-width: 600px; width: 100%; margin: auto;
}

/* Flashcard */
.flashcard {
  width: 100%; perspective: 1000px; cursor: pointer; margin-bottom: 24px;
}
.flashcard-inner {
  position: relative; width: 100%; min-height: 200px;
  transition: transform .55s ease;
  transform-style: preserve-3d; -webkit-transform-style: preserve-3d;
  will-change: transform;
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.fc-front, .fc-back {
  position: absolute; width: 100%; min-height: 200px;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  background: var(--card); border: 2px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 30px 24px; gap: 12px; text-align: center;
}
.fc-back { transform: rotateY(180deg); -webkit-transform: rotateY(180deg); }

/* Rounded sticker peel corner — front side */
.fc-front::after {
  content: '';
  position: absolute; bottom: 0; right: 0;
  width: 24px; height: 24px;
  background: var(--border);
  border-radius: 50% 0 var(--radius) 0;
  box-shadow: -2px -2px 5px rgba(0,0,0,.25);
  pointer-events: none;
}
/* Rounded sticker peel corner — back side (mirrored) */
.fc-back::after {
  content: '';
  position: absolute; bottom: 0; left: 0;
  width: 24px; height: 24px;
  background: var(--border);
  border-radius: 0 50% 0 var(--radius);
  box-shadow: 2px -2px 5px rgba(0,0,0,.25);
  pointer-events: none;
}

/* Entry peek animation to hint the card is interactive */
@keyframes fc-peek {
  0%,65%,100% { transform: rotateY(0deg); }
  25%          { transform: rotateY(-16deg); }
}
.flashcard-inner.fc-peek { animation: fc-peek 1.1s ease .35s both; }

/* Flashcard tutorial popup */
.fc-tut-ov {
  position: fixed; inset: 0; background: rgba(0,0,0,.65);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; animation: fadeIn .25s ease;
}
.fc-tut-ov.hiding { animation: fadeOut .28s ease forwards; }
.fc-tut-box {
  background: var(--card); border-radius: var(--radius);
  border: 2px solid var(--border);
  padding: 32px 28px; max-width: 300px; width: 88%;
  display: flex; flex-direction: column; align-items: center; gap: 20px;
  box-shadow: var(--shadow);
}
.fc-tut-demo { perspective: 500px; width: 150px; height: 86px; }
.fc-tut-inner {
  width: 100%; height: 100%; position: relative;
  transform-style: preserve-3d;
  animation: tut-flip 2.8s ease-in-out infinite;
}
@keyframes tut-flip {
  0%,35%  { transform: rotateY(0deg); }
  55%,90% { transform: rotateY(180deg); }
  100%    { transform: rotateY(360deg); }
}
.fc-tut-face {
  position: absolute; inset: 0; backface-visibility: hidden;
  display: flex; align-items: center; justify-content: center;
  border-radius: 10px; border: 2px solid var(--border);
  background: var(--bg2); font-weight: 800;
}
.fc-tut-face-b { transform: rotateY(180deg); color: var(--green); font-size: .95rem; }
.fc-tut-text { text-align: center; color: var(--text); font-size: .97rem; line-height: 1.55; margin: 0; }
@keyframes fadeOut { to { opacity: 0; } }

.fc-word { font-size: 2.4rem; font-weight: 800; line-height: 1.2; }
.fc-hint { font-size: 1rem; color: var(--blue); font-style: italic; }
.fc-translation { font-size: 1.6rem; font-weight: 700; color: var(--green); }
.fc-example { font-size: .85rem; color: var(--text2); margin-top: 8px; }
.fc-tap-hint { font-size: .85rem; color: var(--text2); margin-top: 16px; }
.fc-audio-row { display: flex; gap: 12px; align-items: center; justify-content: center; }
.fc-btn-row { display: flex; gap: 10px; width: 100%; max-width: 340px; margin-top: 14px; }
.fc-btn-row .btn { flex: 1; font-size: .92rem; padding: 12px 8px; }

/* Multiple Choice */
.mc-question {
  text-align: center; margin-bottom: 28px; width: 100%;
}
.mc-label  { font-size: .9rem; color: var(--text2); margin-bottom: 12px; text-transform: uppercase; letter-spacing: 1px; }
.mc-word   { font-size: 2rem; font-weight: 800; display: flex; align-items: center; justify-content: center; gap: 14px; }
.mc-hint   { font-size: 1rem; color: var(--blue); margin-top: 6px; }

.options-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; width: 100%; }
.option-btn {
  padding: 16px 12px; border-radius: 14px; text-align: center; font-weight: 600; font-size: .95rem;
  background: var(--card); border: 2px solid var(--border);
  transition: all var(--trans); line-height: 1.3;
}
.option-btn:hover:not(:disabled) { background: var(--bg3); border-color: var(--blue); transform: translateY(-2px); }
.option-btn.correct  { background: rgba(88,204,2,.15); border-color: var(--green); color: var(--green); }
.option-btn.wrong    { background: rgba(255,75,75,.15); border-color: var(--red);   color: var(--red); }
.option-btn:disabled { cursor: default; }

/* Matching */
.match-label { font-size: .9rem; color: var(--text2); margin-bottom: 20px; text-transform: uppercase; letter-spacing: 1px; }
.match-grid  { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; }
.match-btn {
  padding: 14px 10px; border-radius: 12px; text-align: center; font-size: .9rem; font-weight: 600;
  background: var(--card); border: 2px solid var(--border);
  transition: all var(--trans); min-height: 56px;
  display: flex; align-items: center; justify-content: center; line-height: 1.3;
}
.match-btn:hover:not(:disabled):not(.matched) { background: var(--bg3); border-color: var(--blue); }
.match-btn.selected { border-color: var(--blue); background: rgba(28,176,246,.15); }
.match-btn.matched  { border-color: var(--green); background: rgba(88,204,2,.15); color: var(--green); opacity: .6; }
.match-btn.wrong-shake { animation: shake .4s ease; border-color: var(--red); background: rgba(255,75,75,.15); }
.match-hint { display: block; font-size: .72rem; color: var(--blue); font-style: italic; opacity: .8; margin-top: 2px; }

/* Typing */
.type-question { text-align: center; margin-bottom: 28px; width: 100%; }
.type-input-wrap {
  width: 100%; position: relative; margin-bottom: 16px;
}
.type-input {
  width: 100%; padding: 18px 20px; border-radius: 14px; font-size: 1.1rem;
  background: var(--card); border: 2px solid var(--border); color: var(--text);
  transition: border-color var(--trans);
}
.type-input:focus { border-color: var(--blue); }
.type-input.correct { border-color: var(--green); background: rgba(88,204,2,.1); }
.type-input.wrong   { border-color: var(--red);   background: rgba(255,75,75,.1); }
.fill-sentence { font-size: 1.3rem; font-weight: 600; text-align: center; padding: 16px; background: var(--bg3); border-radius: 12px; margin: 8px 0; line-height: 1.6; color: var(--text); }
.fill-blank-slot { display: inline-block; min-width: 80px; border-bottom: 3px solid var(--blue); color: var(--blue); padding: 0 4px; }
.fp-correct { color: var(--green); font-weight: 800; border-bottom: 3px solid var(--green); }
.fp-wrong   { color: var(--red);   font-weight: 800; border-bottom: 3px solid var(--red); text-decoration: line-through; }

/* fill-pick chips */
.fill-chips {
  display: flex; flex-wrap: wrap; gap: 10px;
  justify-content: center; margin-top: 20px; padding: 0 8px;
}
.fill-chip {
  background: var(--bg3); border: 2px solid var(--border);
  border-radius: 12px; padding: 10px 18px;
  color: var(--text); font-size: 1rem; cursor: pointer;
  transition: all .18s; min-width: 80px; text-align: center;
}
.fill-chip:hover:not(:disabled) { border-color: var(--blue); background: rgba(28,176,246,.12); transform: translateY(-2px); }
.fill-chip:disabled { cursor: default; opacity: .7; }
.fill-chip.fp-chip-ok  { border-color: var(--green); background: rgba(88,204,2,.15);  color: var(--green); }
.fill-chip.fp-chip-bad { border-color: var(--red);   background: rgba(255,75,75,.15); color: var(--red);   }

.type-answer-hint { font-size: .9rem; color: var(--text2); text-align: center; margin-top: 8px; }
.type-answer-hint span { color: var(--green); font-weight: 700; }

/* ─── Sentence Builder ──────────────────────────────────────── */
.sentbuild-display {
  min-height: 60px; background: var(--bg3); border: 2px dashed var(--border);
  border-radius: 14px; padding: 12px 16px; margin: 12px 0;
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  transition: border-color .2s;
}
.sentbuild-display:not(:empty) { border-color: var(--blue); border-style: solid; }
.sentbuild-placeholder { color: var(--text2); font-size: .9rem; width: 100%; text-align: center; }
.sentbuild-part {
  background: var(--blue); color: #fff; border-radius: 8px;
  padding: 5px 12px; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: opacity .15s;
}
.sentbuild-part:hover { opacity: .75; }
.sentbuild-chip.fp-chip-ok { opacity: .4; }

/* ─── Listen Pick ────────────────────────────────────────────── */
.btn-audio-big {
  display: block; margin: 20px auto; padding: 18px 40px;
  background: var(--bg3); border: 2px solid var(--blue);
  border-radius: 50px; font-size: 1.5rem; color: var(--blue);
  cursor: pointer; transition: all .18s;
}
.btn-audio-big:hover { background: rgba(28,176,246,.15); transform: scale(1.05); }
.btn-audio-big:active { transform: scale(.97); }

/* ─── Dialogue Gap ───────────────────────────────────────────── */
.dialog-wrap { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 420px; margin: 12px 0; }
.dialog-line { display: flex; align-items: flex-start; gap: 10px; }
.dialog-a { flex-direction: row; }
.dialog-b { flex-direction: row-reverse; }
.dialog-avatar { font-size: 1.6rem; line-height: 1; margin-top: 4px; }
.dialog-bubble {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 14px; padding: 10px 14px; font-size: 1rem;
  line-height: 1.6; flex: 1; position: relative;
}
.dialog-a .dialog-bubble { border-top-left-radius: 4px; }
.dialog-b .dialog-bubble { border-top-right-radius: 4px; background: rgba(28,176,246,.12); border-color: var(--blue); }
.dialog-tr { font-size: .78rem; color: var(--text2); font-style: italic; margin-top: 4px; }
.dialog-inp {
  border: none; border-bottom: 2px solid var(--blue);
  background: transparent; color: var(--text); font-size: 1rem;
  padding: 2px 4px; width: auto; min-width: 80px; max-width: 160px;
  outline: none; font-family: inherit;
}
.dialog-inp:focus { border-bottom-color: var(--purple); }
.dialog-inp.correct { border-bottom-color: var(--green); color: var(--green); font-weight: 700; }
.dialog-inp.wrong   { border-bottom-color: var(--red);   color: var(--red); }

/* ─── Memory Cards ───────────────────────────────────────────── */
.memory-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  width: 100%; max-width: 400px; margin: 12px auto;
}
@media (max-width: 380px) { .memory-grid { grid-template-columns: repeat(2, 1fr); } }
.memory-card {
  aspect-ratio: 1 / 1.1; perspective: 600px; cursor: pointer;
}
.memory-card-inner {
  position: relative; width: 100%; height: 100%;
  transform-style: preserve-3d; transition: transform .45s ease;
}
.memory-card.flipped .memory-card-inner { transform: rotateY(180deg); }
.memory-card.matched .memory-card-inner { transform: rotateY(180deg); }
.memory-front, .memory-back {
  position: absolute; inset: 0;
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
  border-radius: 12px; display: flex; align-items: center;
  justify-content: center; text-align: center; padding: 8px;
  font-size: .9rem; font-weight: 600;
  border: 2px solid var(--border);
}
.memory-front { background: var(--bg3); color: var(--text2); font-size: 1.6rem; }
.memory-back  { background: var(--card); transform: rotateY(180deg); line-height: 1.3; }
.memory-card.matched .memory-back { border-color: var(--green); background: rgba(88,204,2,.15); color: var(--green); }

/* ─── Speed Round ────────────────────────────────────────────── */
.speed-timer {
  background: var(--bg3); border: 2px solid var(--border);
  border-radius: 20px; padding: 4px 12px; font-weight: 800;
  font-size: .95rem; color: var(--text); min-width: 42px; text-align: center;
  transition: all .3s;
}
.speed-timer.urgent { border-color: var(--red); color: var(--red); animation: pulse-red .7s ease infinite; }
@keyframes pulse-red { 0%,100%{opacity:1} 50%{opacity:.5} }

.speed-wrong-list {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 14px; padding: 14px; margin-top: 16px;
  text-align: left; width: 100%;
}
.speed-wrong-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 0; border-bottom: 1px solid var(--border); gap: 12px;
}
.speed-wrong-item:last-child { border-bottom: none; }
.speed-word { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.speed-tr   { font-size: .9rem; color: var(--text2); flex: 1; text-align: right; }

/* ─── Kanji Screen ───────────────────────────────────────────── */
.kanji-big {
  font-size: 5rem; font-weight: 900; line-height: 1;
  background: var(--bg3); border: 2px solid var(--border);
  border-radius: 20px; padding: 20px 30px; margin: 12px 0;
  display: inline-block; text-shadow: 0 2px 12px rgba(0,0,0,.5);
}
.kanji-small { font-size: 1.5rem; font-weight: 700; color: var(--red); }

/* ─── Speed Round Stats ──────────────────────────────────────── */
.sr-stats-row {
  display: flex; gap: 10px; justify-content: center;
  flex-wrap: wrap; margin: 12px 0;
}
.sr-stat-card {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 14px; padding: 12px 18px; text-align: center; min-width: 80px;
}
.sr-stat-val { font-size: 1.4rem; font-weight: 800; color: var(--text1); line-height: 1.1; }
.sr-stat-lbl { font-size: .72rem; color: var(--text2); margin-top: 3px; }
.sr-new-best {
  display: inline-block; background: var(--gold); color: #000;
  font-weight: 800; font-size: .9rem; padding: 4px 14px;
  border-radius: 20px; margin-bottom: 6px; animation: pop .4s ease;
}
.sr-chart { display: flex; align-items: flex-end; gap: 4px; height: 48px; margin: 10px auto; justify-content: center; }
.sr-bar { width: 18px; border-radius: 4px 4px 0 0; background: var(--blue); opacity: .75; min-height: 3px; }
.sr-top-wrong { width: 100%; max-width: 380px; margin: 0 auto; }
.sr-tw-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 7px 10px; border-bottom: 1px solid var(--border);
  font-size: .9rem;
}
.sr-tw-word { font-weight: 700; color: var(--text1); }
.sr-tw-tr   { color: var(--text2); font-size: .8rem; flex: 1; margin: 0 8px; }
.sr-tw-cnt  { background: var(--red); color: #fff; border-radius: 10px; padding: 1px 8px; font-size: .78rem; font-weight: 700; }

/* ─── Feedback Overlay ───────────────────────────────────────── */
.feedback-bar {
  position: fixed; bottom: 0; left: 0; right: 0; padding: 18px 20px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  z-index: 100; transform: translateY(100%); transition: transform .3s ease;
  border-top: 3px solid transparent;
}
.feedback-bar.show    { transform: translateY(0); }
.feedback-bar.correct { background: #162b10; border-top-color: var(--green); }
.feedback-bar.wrong   { background: #2b1010; border-top-color: var(--red); }
.feedback-bar.typo    { background: #2b1e08; border-top-color: var(--gold); }
.feedback-icon { font-size: 1.5rem; flex-shrink: 0; }
.feedback-text { flex: 1; min-width: 0; }
.feedback-text strong { font-size: .95rem; display: block; }
.feedback-text p      { font-size: .82rem; color: var(--text2); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.feedback-bar .btn    { min-width: 100px; flex-shrink: 0; }

/* ─── Lesson Footer ──────────────────────────────────────────── */
.lesson-footer {
  padding: 16px 20px; background: var(--bg2); border-top: 1px solid var(--border);
  display: flex; justify-content: center;
}
.lesson-footer .btn { width: 100%; max-width: 340px; padding: 18px; font-size: 1.05rem; }

#fc-footer { display: none; width: 100%; max-width: 400px; align-items: center; gap: 8px; }
#fc-footer.active { display: flex; }
#btn-fc-save { width: auto; max-width: none; font-size: 1.3rem; padding: 10px 14px; flex-shrink: 0; }
#btn-fc-know { flex: 1; max-width: none; padding: 16px 12px; }
#btn-fc-repeat { width: auto; max-width: none; font-size: .85rem; padding: 10px 14px; flex-shrink: 0; white-space: nowrap; }

/* ─── Complete Screen ────────────────────────────────────────── */
#screen-complete {
  align-items: center; justify-content: center; padding: 40px 24px;
  background: radial-gradient(ellipse at top, #1e2235 0%, var(--bg) 70%);
}
.complete-trophy { font-size: 5rem; animation: pop .6s ease; margin-bottom: 12px; }
.complete-title  { font-size: 2rem; font-weight: 800; margin-bottom: 32px; text-align: center; }
.complete-stats  { display: flex; flex-direction: column; gap: 14px; width: 100%; max-width: 320px; margin-bottom: 40px; }
.complete-stat   {
  display: flex; align-items: center; gap: 16px;
  background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 20px;
}
.complete-stat .cs-icon { font-size: 1.6rem; }
.complete-stat .cs-val  { font-size: 1.1rem; font-weight: 700; }
.complete-stat .cs-lbl  { font-size: .8rem; color: var(--text2); }
.xp-flash { animation: xpflash .8s ease; }

/* ─── Vocabulary Screen ───────────────────────────────────────── */
/* Toolbar (fixed top) */
.vocab-toolbar {
  flex-shrink: 0;
  background: var(--bg2);
  position: relative;
  z-index: 20;
}
/* .vocab-title-row and .vocab-main-title kept for backwards compat */
.vocab-add-btn {
  padding: 9px 18px; border-radius: 22px; font-size: .85rem; font-weight: 700;
  background: var(--green); color: #fff; border: none; cursor: pointer; flex-shrink: 0;
  transition: opacity var(--trans); white-space: nowrap; margin-top: 2px;
}
.vocab-add-btn:hover { opacity: .82; }
.vocab-search-wrap {
  position: relative; padding: 8px 16px 10px;
}
.vocab-search-icon {
  position: absolute; left: 28px; top: 8px; bottom: 10px;
  display: flex; align-items: center;
  font-size: .85rem; pointer-events: none; opacity: .6;
}
.vocab-search {
  width: 100%; padding: 10px 16px 10px 36px; border-radius: 22px;
  background: var(--bg3); border: 1.5px solid var(--border); color: var(--text);
  font-size: .9rem; transition: border-color var(--trans);
  -webkit-appearance: none; appearance: none;
}
.vocab-search:focus { border-color: var(--blue); outline: none; }
.vocab-search::-webkit-search-cancel-button { opacity: .5; cursor: pointer; }
/* Filter bar: ряд 1 — усі мови; ряд 2 — теми уроків | збережені + рівні */
.vocab-filter-bar {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  padding: 0 16px 10px;
  border-bottom: 1px solid var(--border);
  overflow: visible;
}
.vocab-filter-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.vocab-filter-row-langs {
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 1px;
}
.vocab-filter-row-langs::-webkit-scrollbar { display: none; }
.vocab-filter-langs-only {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 6px;
  flex: 1 1 auto;
  min-width: min-content;
}
.vocab-filter-row-secondary {
  overflow: visible;
}
.vocab-filter-scroll {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  min-width: 0;
  flex: 1 1 0;
}
.vocab-filter-scroll::-webkit-scrollbar { display: none; }
.vocab-filter-meta { flex: 1 1 0; }
.vocab-filter-topics {
  flex: 0 0 auto;
  position: relative;
  overflow: visible;
}
.vocab-filter-vsep {
  align-self: stretch;
  width: 1px;
  min-height: 30px;
  flex-shrink: 0;
  margin: 2px 0;
  background: var(--border);
  border-radius: 1px;
}
.topic-dd-wrap {
  position: relative;
  flex-shrink: 0;
}
.filter-btn {
  padding: 5px 14px; border-radius: 20px; font-size: .82rem; font-weight: 600;
  background: var(--bg3); border: 1px solid var(--border); white-space: nowrap;
  transition: all var(--trans); flex-shrink: 0; cursor: pointer;
}
.filter-btn:hover { border-color: var(--blue); color: var(--blue); }
.filter-btn.active { background: var(--green); border-color: var(--green); color: #fff; }
.filter-btn.fp-star.active { background: var(--gold); border-color: var(--gold); color: #fff; }
.filter-btn.fp-level.active { background: var(--blue); border-color: var(--blue); color: #fff; }
.filter-btn.fp-topic.active { background: var(--purple,#a855f7); border-color: var(--purple,#a855f7); color: #fff; }
.topic-dd-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 20px; font-size: .8rem; font-weight: 600; color: var(--text2);
  cursor: pointer; transition: all var(--trans);
}
.topic-dd-btn:hover { border-color: var(--purple,#a855f7); color: var(--text); }
.topic-dd-btn.has-active { background: rgba(168,85,247,.15); border-color: var(--purple,#a855f7); color: var(--text); }
.topic-dd-badge { display: inline-flex; align-items: center; justify-content: center; min-width: 18px; height: 18px; padding: 0 5px; background: var(--purple,#a855f7); color: #fff; border-radius: 9px; font-size: .72rem; font-weight: 700; }
.topic-dd-menu {
  position: absolute; top: calc(100% + 4px); left: 0; min-width: 220px; max-width: min(360px, calc(100vw - 20px)); z-index: 5000;
  background: var(--bg2); border: 1px solid var(--border2,var(--border)); border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0,0,0,.4); overflow: hidden; animation: fadeIn .15s ease;
}
.topic-dd-menu.topic-dd-menu--fixed {
  position: fixed;
  z-index: 10000;
  margin: 0;
}
.topic-dd-clear { width: 100%; padding: 10px 14px; font-size: .8rem; font-weight: 700; color: var(--text2); background: transparent; border: none; border-bottom: 1px solid var(--border); text-align: left; cursor: pointer; }
.topic-dd-clear:hover { color: var(--text); background: var(--bg3); }
.topic-dd-list { max-height: 260px; overflow-y: auto; padding: 6px 0; scrollbar-width: thin; }
.topic-dd-item { display: flex; align-items: center; gap: 10px; padding: 8px 14px; cursor: pointer; font-size: .85rem; color: var(--text2); transition: background var(--trans); }
.topic-dd-item:hover { background: var(--bg3); color: var(--text); }
.topic-dd-item input[type=checkbox] { width: 16px; height: 16px; accent-color: var(--purple,#a855f7); flex-shrink: 0; cursor: pointer; }
.topic-dd-item span { flex: 1; }
.topic-dd-apply { width: 100%; padding: 10px 14px; font-size: .85rem; font-weight: 700; color: #fff; background: var(--purple,#a855f7); border: none; border-top: 1px solid var(--border); text-align: center; cursor: pointer; transition: opacity var(--trans); }
.topic-dd-apply:hover { opacity: .85; }

/* Table */
#vocab-words-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
  z-index: 1;
}
.vocab-table-header {
  display: grid;
  grid-template-columns: 2fr 1.5fr 95px 76px 116px;
  padding: 0 16px; border-bottom: 2px solid var(--border);
  background: var(--bg2); flex-shrink: 0;
}
.vt-th {
  padding: 9px 8px; font-size: .75rem; font-weight: 700; color: var(--text3);
  text-transform: uppercase; letter-spacing: .06em;
  display: flex; align-items: center; gap: 4px; cursor: pointer;
  user-select: none; white-space: nowrap; transition: color var(--trans);
}
.vt-th:hover { color: var(--text); }
.vt-th.vt-active { color: var(--blue); }
.vt-th.vt-th-actions { cursor: default; }
.vt-arrow { font-size: .7rem; opacity: .6; }
.vt-active .vt-arrow { opacity: 1; }

#vocab-list-wrap { flex: 1; overflow-y: auto; }
.vocab-empty { text-align: center; padding: 60px 20px; color: var(--text2); font-size: 1rem; }

/* Table rows */
.vocab-item {
  display: grid;
  grid-template-columns: 2fr 1.5fr 95px 76px 116px;
  padding: 0 16px; align-items: center;
  border-bottom: 1px solid var(--border); min-height: 58px;
  transition: background var(--trans);
}
.vocab-item:hover { background: var(--bg3); }
.vi-word { padding: 10px 8px; min-width: 0; }
.vi-word strong { font-size: .95rem; font-weight: 700; display: block; }
.vi-word small  { font-size: .75rem; color: var(--text3); display: block; margin-top: 1px; }
.vi-tr   { padding: 10px 8px; font-size: .9rem; color: var(--text2); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vi-pos  { padding: 10px 8px; font-size: .8rem; color: var(--text2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.vi-level{ padding: 10px 8px; }
.vi-level-badge {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 3px 10px; border-radius: 20px; font-size: .78rem; font-weight: 800;
  background: rgba(88,204,2,.18); color: var(--green); border: 1.5px solid rgba(88,204,2,.4);
}
.vi-level-badge.lvl-b { background: rgba(28,176,246,.14); color: var(--blue); border-color: rgba(28,176,246,.4); }
.vi-level-badge.lvl-c { background: rgba(255,176,32,.14); color: var(--gold); border-color: rgba(255,176,32,.4); }
.vi-actions { padding: 4px 6px; display: flex; gap: 4px; align-items: center; justify-content: flex-end; }
.vi-btn {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .88rem; background: transparent; border: 1px solid transparent;
  transition: all var(--trans); cursor: pointer; flex-shrink: 0;
}
.vi-btn:hover { background: var(--border); border-color: var(--border); }
.vi-btn.vi-star { opacity: 0.2; }
.vi-btn.vi-star.vi-star-on { opacity: 1; color: var(--gold); }
.vi-btn.vi-del:hover { color: var(--red); }
.vi-btn.vi-del-confirm { color: #fff !important; background: var(--red); border-color: var(--red); font-size: .65rem; width: 40px; border-radius: 10px; }

/* Add Word Bottom Sheet */
.aw-overlay {
  display: none; position: fixed; inset: 0; z-index: 300;
  background: rgba(0,0,0,.6); backdrop-filter: blur(4px);
  align-items: flex-end; justify-content: center;
}
.aw-overlay.open { display: flex; }
.aw-sheet {
  background: var(--bg2); border-top: 1px solid var(--border);
  border-top-left-radius: 22px; border-top-right-radius: 22px;
  width: 100%; max-width: 600px;
  animation: sheetUp .28s cubic-bezier(.32,0,.67,0);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  box-shadow: 0 -8px 40px rgba(0,0,0,.35);
}
@keyframes sheetUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
.aw-handle {
  width: 36px; height: 4px; background: var(--border2); border-radius: 2px;
  margin: 10px auto 0;
}
.aw-hdr {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px 10px; border-bottom: 1px solid var(--border);
}
.aw-title { font-size: 1.1rem; font-weight: 800; letter-spacing: -.3px; }
.aw-close {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--bg3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; cursor: pointer; transition: background var(--trans);
}
.aw-close:hover { background: var(--border); }
.aw-body { padding: 16px 20px 20px; display: flex; flex-direction: column; gap: 4px; }
.aw-lbl {
  font-size: .72rem; font-weight: 700; color: var(--text3);
  text-transform: uppercase; letter-spacing: .08em; margin-top: 12px;
}
.aw-inp {
  width: 100%; padding: 14px 16px; border-radius: 14px; font-size: 1rem;
  background: var(--card); border: 2px solid var(--border); color: var(--text);
  transition: border-color var(--trans);
}
.aw-inp:focus { border-color: var(--green); outline: none; }
/* Level selector */
/* POS selector */
.aw-pos-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 2px; }
.aw-pos-btn {
  padding: 6px 14px; border-radius: 20px; font-size: .82rem; font-weight: 600;
  background: var(--bg3); border: 1.5px solid var(--border); color: var(--text2);
  cursor: pointer; transition: all var(--trans);
}
.aw-pos-btn:hover { border-color: var(--gold); color: var(--gold); }
.aw-pos-btn.active { background: rgba(255,176,32,.12); border-color: var(--gold); color: var(--gold); }
/* Level selector */
.aw-levels { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 2px; }
.aw-level-btn {
  padding: 6px 14px; border-radius: 20px; font-size: .85rem; font-weight: 700;
  background: var(--bg3); border: 1.5px solid var(--border); color: var(--text2);
  cursor: pointer; transition: all var(--trans);
}
.aw-level-btn:hover { border-color: var(--blue); color: var(--blue); }
.aw-level-btn.active { background: rgba(28,176,246,.15); border-color: var(--blue); color: var(--blue); }
.aw-save-btn { width: 100%; padding: 15px; border-radius: 14px; font-size: 1rem; font-weight: 700; margin-top: 16px; }

/* ─── Stats Screen (inside home) ─────────────────────────────── */
.stats-bar {
  display: flex; gap: 12px; padding: 16px 20px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.stats-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 14px 20px; min-width: 120px; text-align: center; flex-shrink: 0;
}
.stats-card .sc-val { font-size: 1.6rem; font-weight: 800; line-height: 1; }
.stats-card .sc-lbl { font-size: .75rem; color: var(--text2); margin-top: 4px; }

/* ─── Animations ─────────────────────────────────────────────── */
@keyframes pop {
  0%   { transform: scale(.5); opacity: 0; }
  70%  { transform: scale(1.15); }
  100% { transform: scale(1);   opacity: 1; }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  20%     { transform: translateX(-8px); }
  40%     { transform: translateX(8px); }
  60%     { transform: translateX(-5px); }
  80%     { transform: translateX(5px); }
}
@keyframes xpflash {
  0%   { transform: scale(1); }
  30%  { transform: scale(1.4); color: var(--gold); }
  100% { transform: scale(1); }
}
@keyframes heartlost {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.5); filter: brightness(1.5); }
  100% { transform: scale(1); opacity: .3; }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
/* Toast-specific animation: preserves translateX(-50%) centering */
@keyframes toastIn {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}
.anim-in { animation: fadeIn .35s ease; }

/* ─── Confetti ───────────────────────────────────────────────── */
.confetti-piece {
  position: fixed; width: 10px; height: 14px; border-radius: 2px;
  animation: confettiFall linear forwards;
  pointer-events: none; z-index: 9999;
}
@keyframes confettiFall {
  0%   { transform: translateY(-20px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* ─── Responsive ─────────────────────────────────────────────── */
@media (min-width: 600px) {
  .lang-grid       { grid-template-columns: repeat(3, 1fr); max-width: 500px; }
  .options-grid    { grid-template-columns: 1fr 1fr; }
  .exercise-wrap   { padding: 40px 32px; }
}
@media (max-width: 360px) {
  .lang-grid       { grid-template-columns: 1fr 1fr; }
  .options-grid    { grid-template-columns: 1fr; }
  .fc-word         { font-size: 1.9rem; }
}

/* ─── Settings screen ────────────────────────────────────────────────── */
.settings-group { margin-bottom: 28px; }
.settings-label { display: block; font-weight: 700; font-size: .95rem; margin-bottom: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: .5px; font-size: .8rem; }
.settings-input { width: 100%; padding: 14px 16px; border-radius: 12px; background: var(--card); border: 2px solid var(--border); color: var(--text); font-size: 1rem; transition: border-color .2s; }
.settings-input:focus { border-color: var(--blue); outline: none; }
.radio-group { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-option { display: flex; align-items: center; gap: 8px; padding: 12px 18px; border-radius: 12px; background: var(--card); border: 2px solid var(--border); cursor: pointer; transition: border-color .2s; font-size: .95rem; }
.radio-option:has(input:checked) { border-color: var(--green); background: rgba(88,204,2,.1); }
.radio-option input { accent-color: var(--green); }

/* ─── Chat screen ────────────────────────────────────────────────────── */
.chat-history-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.chat-history-card { display: flex; align-items: center; gap: 6px; }
.chat-hist-continue {
  flex: 1; display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 12px;
  background: var(--card); border: 1.5px solid var(--border);
  cursor: pointer; text-align: left; transition: all .2s;
}
.chat-hist-continue:hover { border-color: var(--green); background: rgba(88,204,2,.07); }
.chat-hist-icon { font-size: 1.5rem; flex-shrink: 0; }
.chat-hist-info { flex: 1; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.chat-hist-label { font-weight: 700; font-size: .9rem; color: var(--text1); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-hist-meta  { font-size: .75rem; color: var(--text2); }
.chat-hist-arrow { font-size: .8rem; color: var(--green); flex-shrink: 0; }
.chat-hist-delete {
  flex-shrink: 0; width: 32px; height: 32px; border-radius: 8px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text2); font-size: .8rem; cursor: pointer; transition: all .2s;
}
.chat-hist-delete:hover { background: rgba(255,60,60,.12); border-color: #f55; color: #f55; }

.scenario-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.scenario-btn { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 16px 12px; border-radius: 14px; background: var(--card); border: 2px solid var(--border); cursor: pointer; font-size: .9rem; font-weight: 600; transition: all .2s; }
.scenario-btn:hover { background: var(--bg3); border-color: var(--blue); }
.scenario-btn.active { border-color: var(--green); background: rgba(88,204,2,.08); color: var(--green); }
.chat-messages { display: flex; flex-direction: column; gap: 10px; padding: 4px 0; }
.chat-msg { padding: 12px 16px; border-radius: 16px; font-size: .95rem; line-height: 1.5; max-width: 85%; }
.chat-msg-user     { background: var(--green); color: #fff; align-self: flex-end; border-bottom-right-radius: 4px; }
.chat-msg-assistant{ background: var(--card); border: 1px solid var(--border); align-self: flex-start; border-bottom-left-radius: 4px; }
.chat-msg-system   { background: rgba(255,176,32,.1); border: 1px solid rgba(255,176,32,.3); color: var(--gold); font-size: .85rem; align-self: center; text-align: center; border-radius: 10px; }
.chat-msg-loading  { background: var(--bg3); align-self: flex-start; }
.chat-msg-error    { background: rgba(255,75,75,.1); border: 1px solid var(--red); color: var(--red); align-self: center; font-size: .85rem; }
.chat-note { margin-top: 8px; padding: 8px 12px; background: rgba(206,130,255,.1); border-left: 3px solid var(--purple); border-radius: 0 8px 8px 0; font-size: .85rem; color: var(--purple); }
.chat-breakdown { margin-top: 8px; padding: 8px 12px; background: rgba(74,144,217,.1); border-left: 3px solid var(--blue); border-radius: 0 8px 8px 0; font-size: .85rem; color: var(--blue); line-height: 1.7; }
.chat-tr { font-size: .88rem; color: var(--text2); margin: 1px 0 6px 0; font-style: italic; }
.btn-speak-inline { background: none; border: none; cursor: pointer; font-size: 1rem; padding: 0 4px; opacity: .6; vertical-align: middle; line-height: 1; }
.btn-speak-inline:hover { opacity: 1; }
.chat-typing { letter-spacing: 4px; animation: blink 1s infinite; }
@keyframes blink { 0%,100%{opacity:.2}50%{opacity:1} }
.chat-input-row {
  display: flex; gap: 10px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: var(--bg2); border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ─── Video screen ────────────────────────────────────────────────────── */
.video-card { display: flex; align-items: center; gap: 14px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 14px 16px; }
.vc-info { flex: 1; }
.vc-title { font-weight: 700; font-size: .95rem; margin-bottom: 4px; }
.vc-desc  { font-size: .8rem; color: var(--text2); }
.vc-level { display: inline-block; margin-top: 6px; padding: 2px 10px; border-radius: 20px; font-size: .75rem; font-weight: 700; background: var(--green); color: #fff; }
.vc-btn   { padding: 10px 16px; font-size: .85rem; flex-shrink: 0; text-decoration: none; border-radius: 10px; }

/* ─── Radio :has fix for older browsers ─────────────────────────────── */
@supports not selector(:has(input)) {
  .radio-option.selected { border-color: var(--green); background: rgba(88,204,2,.1); }
}

/* ─── Video Player ────────────────────────────────────────────────── */
.vp-urlbar {
  display: flex; gap: 10px; padding: 12px 16px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
}
.vp-langbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; background: var(--bg2); border-bottom: 1px solid var(--border);
}
.vp-langpair { display: flex; flex-direction: column; gap: 4px; }
.vp-langlbl  { font-size: .75rem; font-weight: 700; color: var(--text2); text-transform: uppercase; letter-spacing: .5px; }
.vp-select   { background: var(--card); border: 1px solid var(--border); color: var(--text); padding: 6px 10px; border-radius: 8px; font-size: .9rem; }

.sub-status             { font-size: .82rem; margin-left: auto; }
.sub-status-ok          { color: var(--green); }
.sub-status-loading     { color: var(--gold); }
.sub-status-warn        { color: var(--gold); }
.sub-status-error       { color: var(--red); }

/* split layout */
.vp-body {
  flex: 1; display: flex; flex-direction: column; overflow: hidden;
  min-height: 0;
}
@media (min-width: 900px) {
  .vp-body { flex-direction: row; }
  /* left col: 55% wide but never wider than what fits in height */
  .vp-left  { width: min(55%, calc((100dvh - 260px) * 16 / 9)); flex-shrink: 0; }
  .vp-right { flex: 1; min-width: 0; }
}

.vp-left  { display: flex; flex-direction: column; min-height: 0; flex-shrink: 0; }
.vp-right { display: flex; flex-direction: column; overflow: hidden; border-left: 1px solid var(--border); min-height: 0; flex: 1; }

/* 16:9 wrapper */
.vp-player-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  flex-shrink: 0;
  max-height: calc(100dvh - 340px);
  overflow: hidden;
}
@media (max-width: 899px) {
  .vp-player-wrap { max-height: clamp(160px, 40vw, 260px); }
  .vp-tr-header { display: none; }
  .vp-right { border-left: none; border-top: 1px solid var(--border); }
}
.vp-player-wrap #yt-player-inner {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
}

/* subtitle bar */
.vp-sub-bar {
  background: var(--bg2); border-top: 2px solid var(--border);
  display: flex; flex-direction: column; flex-shrink: 0;
}
.vp-sub {
  padding: 12px 20px; font-size: 1.1rem; line-height: 1.55; min-height: 50px;
  text-align: center; transition: opacity .15s;
}
.vp-sub:empty { opacity: .25; }
.vp-sub-a     { color: var(--blue); font-weight: 700; letter-spacing: .01em; }
.vp-sub-b     { color: var(--gold); font-weight: 500; }
.vp-sub-divider { height: 1px; background: var(--border); margin: 0; }

/* transcript */
.vp-tr-header {
  display: flex; padding: 8px 12px; gap: 8px;
  background: var(--bg3); border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.transcript-list {
  flex: 1; overflow-y: auto; font-size: .88rem;
}
.tr-empty { padding: 24px 16px; color: var(--text2); text-align: center; }
.tr-row {
  display: grid; grid-template-columns: 42px 1fr 1fr; gap: 6px;
  padding: 7px 10px; border-bottom: 1px solid rgba(46,50,80,.4);
  cursor: pointer; transition: background .15s;
}
.tr-row:hover  { background: var(--bg3); }
.tr-row.active {
  background: rgba(28,176,246,.15);
  border-left: 3px solid var(--blue);
  padding-left: 7px;
}
.tr-row.active .tr-a { color: #fff; font-weight: 700; }
.tr-row.active .tr-b { color: var(--gold); font-weight: 600; }
.tr-row.active .tr-time { color: var(--blue); font-weight: 600; }
.tr-time { color: var(--text2); font-size: .78rem; font-variant-numeric: tabular-nums; align-self: start; padding-top: 1px; }
.tr-cell { line-height: 1.45; }
.tr-a    { color: var(--blue); }
.tr-b    { color: var(--gold); }

/* Library modal */
.vlib-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 200;
  align-items: center; justify-content: center; padding: 20px;
}
.vlib-modal {
  background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius);
  width: 100%; max-width: 560px; max-height: 80vh; display: flex; flex-direction: column;
  box-shadow: var(--shadow);
}
.vlib-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.vlib-header h3 { font-size: 1rem; }
.vlib-list  { overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.vlib-row   { display: flex; align-items: center; gap: 12px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; }
.vlib-info  { flex: 1; }
.vlib-title { font-weight: 700; font-size: .9rem; }
.vlib-desc  { font-size: .8rem; color: var(--text2); margin-top: 2px; }
.vhist-thumb { width: 80px; height: 56px; border-radius: 8px; object-fit: cover; flex-shrink: 0; background: var(--bg); }
.vhist-row   { align-items: center; }

/* ─── Bottom Navigation ──────────────────────────────────────── */
.bottom-nav {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: 60px; display: flex; align-items: stretch;
  background: var(--bg2); border-top: 1px solid var(--border);
  z-index: 20; padding-bottom: env(safe-area-inset-bottom);
}
.bn-item {
  flex: 1; display: flex; flex-direction: column; position: relative;
  align-items: center; justify-content: center; gap: 2px;
  font-size: .62rem; font-weight: 600; color: var(--text2);
  transition: color var(--trans); padding: 6px 0;
}
.bn-item.active::after {
  content: '';
  position: absolute; bottom: 6px;
  width: 18px; height: 3px; border-radius: 2px;
  background: var(--green); opacity: .6;
}
.bn-item .bn-icon { font-size: 1.4rem; line-height: 1; transition: transform var(--trans); }
.bn-item.active { color: var(--green); }
.bn-item.active .bn-icon { transform: scale(1.1); }

/* ─── App header ─────────────────────────────────────────────── */
.app-header-btn { font-size: 1.25rem; }
.header-lang-wrap { flex: 1; text-align: center; font-weight: 700; font-size: .95rem; padding: 0 4px; }
.hdr-xp-pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 11px; border-radius: 20px;
  background: rgba(255,176,32,.12); border: 1.5px solid rgba(255,176,32,.3);
  color: var(--gold); font-size: .78rem; font-weight: 800;
  white-space: nowrap; flex-shrink: 0; line-height: 1;
}

/* ─── Home layout ────────────────────────────────────────────── */
.home-body { flex: 1; display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
.home-main { flex: 1; display: flex; flex-direction: column; min-height: 0; overflow: hidden; }
/* Header level badge */
.stat-badge.level-badge-hdr {
  background: rgba(88,204,2,.15); color: var(--green);
  border: 1.5px solid rgba(88,204,2,.4); border-radius: 20px;
  padding: 3px 11px; font-size: .82rem; font-weight: 800;
}
/* Practice panel — mobile: horizontal scroll bar below stats */
.home-practice {
  flex-shrink: 0; border-top: 1px solid var(--border);
  background: var(--bg2);
}
.hp-title {
  padding: 10px 20px 4px; font-size: .72rem; font-weight: 700;
  color: var(--text3); text-transform: uppercase; letter-spacing: .07em;
}
/* Mobile tiles: horizontal scroll */
.home-tiles {
  display: flex; gap: 10px; padding: 6px 16px 12px;
  overflow-x: auto; scrollbar-width: none;
}
.home-tiles::-webkit-scrollbar { display: none; }
.home-tile {
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 10px 16px; font-size: .75rem; font-weight: 700; color: var(--text2);
  white-space: nowrap; flex-shrink: 0; min-width: 72px;
  transition: all var(--trans); cursor: pointer;
}
.home-tile-icon { font-size: 1.4rem; line-height: 1; }
.home-tile:hover { border-color: var(--green); color: var(--text); background: var(--bg3); transform: translateY(-2px); box-shadow: 0 4px 16px rgba(88,204,2,.12); }
.home-tile:active { transform: translateY(0); }

/* ─── Practice panel stats ───────────────────────────────── */
.hp-stats { display: flex; flex-direction: column; gap: 6px; padding: 4px 12px 12px; }
.hp-stat-card { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: var(--card); border: 1px solid var(--border); border-radius: 12px; }
.hp-sc-val { font-size: .95rem; font-weight: 700; }
.hp-sc-lbl { font-size: .72rem; color: var(--text2); }
/* Sidebar level badge */
.sb-level-badge { display: inline-flex; align-items: center; justify-content: center; padding: 2px 9px; border-radius: 20px; font-size: .78rem; font-weight: 800; background: rgba(88,204,2,.15); color: var(--green); border: 1.5px solid rgba(88,204,2,.4); }

/* ─── Vocab Tabs ─────────────────────────────────────────────── */
.vocab-tabs {
  display: flex; border-bottom: 1px solid var(--border); background: var(--bg2); flex-shrink: 0;
}
.vtab {
  flex: 1; display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 12px 8px; font-size: .88rem; font-weight: 600; color: var(--text2);
  border-bottom: 2px solid transparent; transition: color var(--trans), border-color var(--trans);
}
.vtab:hover { color: var(--text); }
.vtab.active { color: var(--green); border-bottom-color: var(--green); }

/* ─── Vocab panel layout ─────────────────────────────────────── */
#vocab-words-panel { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
#vocab-alpha-panel { flex: 1; overflow-y: auto; padding: 16px 20px; }

/* ─── Bottom-nav padding on main screens ─────────────────────── */
#screen-home .course-map   { padding-bottom: 12px; }
.home-practice             { padding-bottom: 64px; }
/* ─── Settings redesigned ─────────────────────────────────────── */
#screen-settings { overflow: hidden; }
.sett-wrap { display: flex; flex-direction: column; flex: 1; overflow: hidden; height: 100%; }

/* Mobile: horizontal pill tabs */
.sett-tabs {
  display: flex; gap: 4px; padding: 10px 16px;
  border-bottom: 1px solid var(--border); background: var(--bg2);
  overflow-x: auto; scrollbar-width: none; flex-shrink: 0;
}
.sett-tabs::-webkit-scrollbar { display: none; }
.sett-tab {
  padding: 7px 14px; border-radius: 20px; font-size: .8rem; font-weight: 600;
  color: var(--text2); background: transparent; border: 1px solid transparent;
  white-space: nowrap; flex-shrink: 0; cursor: pointer; transition: all var(--trans);
}
.sett-tab.active { background: rgba(88,204,2,.12); border-color: rgba(88,204,2,.25); color: var(--green); }

/* Desktop: left sub-nav, hide tabs */
.sett-sidenav { display: none; }
@media (min-width: 680px) {
  .sett-tabs { display: none; }
  .sett-wrap { flex-direction: row; }
  .sett-sidenav {
    display: flex; flex-direction: column; gap: 3px;
    width: 200px; flex-shrink: 0; background: var(--bg2);
    border-right: 1px solid var(--border); padding: 18px 12px;
  }
  .sett-sidenav-hdr {
    font-size: .62rem; font-weight: 800; color: var(--text3);
    text-transform: uppercase; letter-spacing: .1em;
    padding: 0 12px; margin-bottom: 8px;
  }
}
.sett-nav-item {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px;
  border-radius: 9px; font-size: .875rem; cursor: pointer;
  color: var(--text2); font-weight: 500; border: 1px solid transparent;
  text-align: left; width: 100%; transition: all var(--trans);
}
.sett-nav-item:hover { background: var(--bg3); color: var(--text); }
.sett-nav-item.active { background: rgba(88,204,2,.12); border-color: rgba(88,204,2,.25); color: var(--green); font-weight: 700; }

/* Content pane */
.sett-content { flex: 1; overflow-y: auto; position: relative; }
.sett-section {
  display: none; padding: 28px 28px 80px;
  flex-direction: column; gap: 24px; max-width: 760px;
}
.sett-section.active { display: flex; animation: screenIn .2s ease; }
@media (max-width: 679px) { .sett-section { padding: 20px 16px 100px; } }

.sett-section-hdr { margin-bottom: 4px; }
.sett-section-hdr h2 { font-size: 1.25rem; font-weight: 800; margin-bottom: 3px; }
.sett-section-hdr p  { font-size: .85rem; color: var(--text2); }
.sett-grp { display: flex; flex-direction: column; gap: 10px; }
.sett-grp-lbl { font-size: .72rem; font-weight: 700; color: var(--text3); text-transform: uppercase; letter-spacing: .06em; }

/* Theme preset buttons */
.theme-preset-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; }
@media (max-width: 479px) { .theme-preset-grid { grid-template-columns: repeat(2,1fr); } }
.theme-preset-btn {
  background: var(--card); border: 1.5px solid var(--border2);
  color: var(--text); border-radius: 10px; padding: 14px 8px;
  font-size: .85rem; font-weight: 600; font-family: inherit; cursor: pointer;
  transition: all var(--trans);
}
.theme-preset-btn:hover { border-color: var(--green); }
.theme-preset-btn.active { border-color: var(--green); color: var(--green); background: rgba(88,204,2,.08); }

/* Custom theme editor */
.custom-theme-editor {
  display: none; background: var(--card); border: 1px solid rgba(88,204,2,.4);
  border-radius: 14px; padding: 20px; flex-direction: column; gap: 20px;
  animation: screenIn .25s ease;
}
.custom-theme-editor.visible { display: flex; }
.palette-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; }
@media (max-width: 479px) { .palette-grid { grid-template-columns: repeat(2,1fr); } }
.palette-btn {
  border-radius: 10px; padding: 10px 10px 9px; cursor: pointer;
  border: 2px solid transparent; transition: border-color var(--trans); text-align: left;
}
.palette-btn:hover { border-color: rgba(255,255,255,.25); }
.palette-btn.active { border-color: var(--green) !important; }
.palette-swatches { display: flex; gap: 3px; margin-bottom: 7px; }
.palette-swatch { width: 13px; height: 13px; border-radius: 3px; border: 1px solid rgba(255,255,255,.1); }
.palette-name { font-size: .72rem; font-weight: 700; }
.color-picker-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 8px; }
@media (max-width: 479px) { .color-picker-grid { grid-template-columns: repeat(2,1fr); } }
.color-pick-item {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 10px;
}
.color-pick-item input[type=color] {
  width: 28px; height: 28px; border: none; background: none;
  cursor: pointer; border-radius: 4px; padding: 0; flex-shrink: 0;
}
.color-pick-label { font-size: .78rem; color: var(--text2); flex: 1; }

/* UI Language options (full-width list buttons) */
.uilang-group { display: flex; flex-direction: column; gap: 8px; }
.uilang-option {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px;
  border-radius: 11px; background: var(--card); border: 1.5px solid var(--border2);
  cursor: pointer; font-size: .95rem; font-weight: 600;
  transition: border-color var(--trans), background var(--trans);
}
.uilang-option:has(input:checked) { border-color: var(--green); background: rgba(88,204,2,.08); color: var(--green); }
.uilang-option input { accent-color: var(--green); }

/* Profile card */
.profile-card {
  display: flex; align-items: center; gap: 18px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px;
}
.profile-avatar {
  width: 60px; height: 60px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--green), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; font-weight: 700;
}
.profile-details { flex: 1; min-width: 0; }
.profile-name-input {
  font-size: 1.05rem; font-weight: 700; color: var(--text);
  background: transparent; border: none; border-bottom: 1.5px solid var(--border);
  outline: none; padding: 2px 0 4px; width: 100%; font-family: inherit;
  transition: border-color .2s;
}
.profile-name-input:focus { border-color: var(--green); }
.profile-name-input::placeholder { color: var(--text3); font-weight: 400; }
.profile-meta { font-size: .78rem; color: var(--text2); margin-top: 6px; }

/* Account learning lang card */
.account-lang-card {
  display: flex; align-items: center; gap: 14px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 14px 16px;
}
.account-lang-flag { font-size: 1.6rem; flex-shrink: 0; }
.account-lang-info { flex: 1; min-width: 0; }
.account-lang-name { font-size: .95rem; font-weight: 700; }
.account-lang-stats { font-size: .78rem; color: var(--text2); margin-top: 3px; }

/* Full-width action buttons */
.sett-action-btn {
  width: 100%; padding: 15px 20px; border-radius: 12px; font-size: .95rem;
  font-weight: 600; font-family: inherit; text-align: left; cursor: pointer;
  background: var(--bg3); border: 1.5px solid var(--border2); color: var(--text);
  transition: all var(--trans); display: flex; align-items: center; gap: 10px;
}
.sett-action-btn:hover { border-color: var(--border); background: var(--card); }
.sett-action-danger { background: rgba(255,75,75,.08); border-color: rgba(255,75,75,.3); color: var(--red); }
.sett-action-danger:hover { background: rgba(255,75,75,.14); border-color: var(--red); }
#screen-chat { height: 100vh; height: 100dvh; padding-bottom: 60px; box-sizing: border-box; }
.chat-panel-messages { flex: 1; overflow-y: auto; display: flex; flex-direction: column; padding: 12px 20px; min-height: 0; }
#screen-vocab #vocab-list-wrap,
#screen-vocab #vocab-alpha-panel { padding-bottom: 76px; }

/* ─── Ollama tip tooltip ─────────────────────────────────────── */
.ollama-tip-wrap { position: relative; display: inline-flex; }
.ollama-tip-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent, #6366f1); color: #fff;
  font-size: .7rem; font-weight: 700; cursor: pointer;
  user-select: none; flex-shrink: 0;
}
.ollama-tip-box {
  display: none; position: absolute; left: 50%; bottom: calc(100% + 8px);
  transform: translateX(-50%);
  background: var(--card, #1e1e2e); color: var(--text, #e2e8f0);
  border: 1px solid var(--border, #334155);
  border-radius: 8px; padding: 10px 12px;
  font-size: .78rem; line-height: 1.5;
  width: 230px; z-index: 100; white-space: normal;
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
}
/* Adaptive positions set by JS */
.ollama-tip-box.tip-below  { bottom: auto; top: calc(100% + 8px); }
.ollama-tip-box.tip-left   { left: auto; right: 0; transform: none; }
.ollama-tip-box.tip-right  { left: 0; transform: none; }
.ollama-tip-box code { background: rgba(255,255,255,.08); padding: 1px 5px; border-radius: 4px; font-size: .76rem; }
.ollama-tip-icon:hover .ollama-tip-box,
.ollama-tip-icon:focus .ollama-tip-box { display: block; }

/* ─── Ollama model picker ────────────────────────────────────── */
.model-pick-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 8px; padding: 8px 10px; border-radius: 8px;
  border: 1px solid var(--border); margin-bottom: 6px;
  background: var(--card);
}
.model-pick-row.recommended { border-color: var(--accent, #6366f1); }
.model-pick-info { flex: 1; min-width: 0; }
.model-pick-name { font-size: .82rem; font-weight: 600; }
.model-pick-meta { font-size: .72rem; color: var(--text2); margin-top: 2px; }
.model-pick-badge {
  font-size: .65rem; padding: 2px 6px; border-radius: 10px;
  background: var(--accent, #6366f1); color: #fff; white-space: nowrap;
}
.model-pick-badge.badge-warn { background: #f59e0b; }
.model-pick-btn { flex-shrink: 0; font-size: .75rem; padding: 5px 12px; }

/* ─── Ollama model manager ───────────────────────────────────── */
.model-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border);
  margin-bottom: 6px; background: var(--card);
}
.model-row.installed { border-color: #22c55e; }
.model-row.downloading { border-color: var(--accent, #6366f1); opacity: .8; }
.model-row-info { flex: 1; min-width: 0; }
.model-row-name { font-size: .82rem; font-weight: 600; display: flex; align-items: center; gap: 5px; }
.model-row-meta { font-size: .72rem; color: var(--text2); margin-top: 2px; }
.model-status-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.model-status-dot.on  { background: #22c55e; }
.model-status-dot.off { background: var(--border); }
.btn-danger { background: #ef4444 !important; color: #fff !important; }
.btn-danger:hover { background: #dc2626 !important; }

/* ─── Picture exercises ──────────────────────────────────────── */
.img-exercise-box {
  display: flex; align-items: center; justify-content: center;
  width: 100%; max-width: 320px; margin: 12px auto;
  border-radius: var(--radius); overflow: hidden;
  background: var(--card); border: 1px solid var(--border);
  min-height: 160px;
}
.lesson-img {
  width: 100%; max-height: 220px; object-fit: cover;
  display: block; border-radius: var(--radius);
}
.img-missing {
  font-size: 3rem; color: var(--text2);
  display: flex; align-items: center; justify-content: center;
  width: 100%; height: 160px;
}

/* ─── Input row (input + mic + kbd inline) ───────────────────── */
.input-row {
  display: flex; align-items: center; gap: 10px;
  width: 100%; max-width: 600px; margin: 16px auto 0;
}
.input-row .type-input { flex: 1; min-width: 0; }

/* Compact icon buttons (mic + keyboard toggle) */
.btn-assist-icon {
  flex-shrink: 0; width: 48px; height: 48px;
  border-radius: 12px; font-size: 1.25rem;
  background: var(--bg3); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background .15s, border-color .15s;
  user-select: none;
}
.btn-assist-icon:hover { background: var(--border); }
.btn-assist-icon.active { border-color: #6366f1; background: rgba(99,102,241,.14); }
.btn-assist-icon.recording {
  border-color: #ef4444; background: rgba(239,68,68,.14);
  animation: mic-pulse .7s ease infinite;
}
@keyframes mic-pulse { 0%,100%{opacity:1} 50%{opacity:.5} }

/* ─── Virtual keyboard panel ─────────────────────────────────── */
.vkbd-panel {
  margin-top: 8px; padding: 10px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); max-width: 600px; margin-left: auto; margin-right: auto;
}
.vkbd-row { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 5px; justify-content: center; }
.vkbd-util { margin-top: 6px; justify-content: flex-start; }
.vkbd-key {
  min-width: 36px; height: 38px; padding: 0 6px;
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: 7px; font-size: .95rem; cursor: pointer;
  transition: background .08s, transform .06s;
  user-select: none; display: flex; align-items: center; justify-content: center;
}
.vkbd-key:hover { background: var(--border); }
.vkbd-key:active { transform: scale(.9); }
.vkbd-bs { min-width: 54px; font-size: .82rem; color: var(--text2); }
.vkbd-space { min-width: 90px; }
.vkbd-caps { min-width: 46px; font-size: .9rem; }
.vkbd-caps.active { border-color: #6366f1; background: rgba(99,102,241,.18); color: #818cf8; }
.vkbd-punct { flex-wrap: wrap; margin-top: 2px; }

/* ─── Windows OSK-style layout ──────────────────────────────── */
.vkbd-panel--osk .vkbd-key {
  box-shadow: 0 3px 0 var(--border);
  border-bottom-width: 2px;
  border-radius: 6px;
  font-weight: 500;
}
.vkbd-panel--osk .vkbd-key:active {
  box-shadow: none;
  transform: translateY(2px);
}
.vkbd-row--s0 { padding-left: 12px; }
.vkbd-row--s1 { padding-left: 30px; }
.vkbd-row--s2 { padding-left: 54px; }
.vkbd-row--extras { flex-wrap: wrap; justify-content: flex-start; padding-top: 2px; }
.vkbd-key--w2 { min-width: 62px; flex-shrink: 0; }
.vkbd-key--num { font-size: .82rem; color: var(--text2); min-width: 32px; }
.vkbd-key--accent {
  background: color-mix(in srgb, var(--accent) 12%, var(--bg3));
  color: var(--accent); font-weight: 600;
}
.vkbd-key--accent:hover { background: color-mix(in srgb, var(--accent) 22%, var(--bg3)); }

/* ─── Japanese hiragana grid (15 cols × 5 rows, no scroll) ──── */
.vkbd-ja-grid {
  display: grid;
  grid-template-columns: repeat(15, 1fr);
  gap: 4px;
}
.vkbd-key-sm {
  min-width: 0; height: 34px; padding: 0 2px; font-size: .85rem;
}

/* ─── AI speaking animation (sound bars) ────────────────────── */
.ai-speaking-anim {
  display: flex; align-items: flex-end; gap: 5px; height: 44px;
  background: var(--bg3); border-radius: 12px; padding: 8px 14px;
  border: 1px solid var(--border);
}
.ai-speaking-anim span {
  display: block; width: 6px; background: var(--accent);
  border-radius: 3px;
  animation: anim-bar 0.85s ease-in-out infinite;
}
.ai-speaking-anim span:nth-child(1) { animation-delay: 0s; }
.ai-speaking-anim span:nth-child(2) { animation-delay: 0.14s; }
.ai-speaking-anim span:nth-child(3) { animation-delay: 0.28s; }
.ai-speaking-anim span:nth-child(4) { animation-delay: 0.42s; }
.ai-speaking-anim span:nth-child(5) { animation-delay: 0.56s; }
@keyframes anim-bar {
  0%, 100% { height: 5px; opacity: 0.4; }
  50% { height: 30px; opacity: 1; }
}

/* ─── Voice chat mic button ──────────────────────────────────── */
.voice-mic-btn {
  width: 90px; height: 90px; border-radius: 50%;
  background: var(--bg3); border: 2px solid var(--border);
  font-size: 2.4rem; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background .2s, border-color .2s;
  user-select: none;
}
.voice-mic-btn:hover { background: var(--border); }
.voice-mic-btn.recording {
  background: rgba(239,68,68,.12); border-color: #ef4444;
  animation: voice-ring 1.2s ease-out infinite;
}
@keyframes voice-ring {
  0%   { box-shadow: 0 0 0 0 rgba(239,68,68,.45); }
  70%  { box-shadow: 0 0 0 26px rgba(239,68,68,0); }
  100% { box-shadow: 0 0 0 0 rgba(239,68,68,0); }
}
.voice-transcript-hint {
  color: var(--text2); font-size: .9rem; min-height: 1.5em;
  text-align: center; max-width: 340px;
}

/* ─── Writing / Tracing screen ─────────────────────────────────────────── */
.writing-card{display:flex;flex-direction:column;align-items:center;padding:20px 16px;gap:16px;}
.wc-label{text-align:center;}
.wc-big{font-size:2.8rem;font-weight:800;color:var(--text1);line-height:1.1;}
.wc-read{font-size:1rem;color:var(--text2);margin-top:4px;}
.writing-canvas-wrap{position:relative;border:2px solid var(--border);border-radius:20px;overflow:hidden;background:var(--card);box-shadow:var(--shadow);}
.wc-ref,.wc-draw{position:absolute;top:0;left:0;width:100%;height:100%;}
.wc-draw{cursor:crosshair;touch-action:none;}
.wc-ctrl{display:flex;gap:8px;width:100%;max-width:380px;}
.wc-ctrl .btn{padding:11px 6px;font-size:.82rem;box-shadow:none;line-height:1.2;}
.wc-fb{padding:10px 14px;border-radius:10px;text-align:center;font-weight:600;font-size:.9rem;display:flex;flex-direction:column;align-items:center;gap:4px;}
.wc-fb-warn{background:rgba(239,68,68,.12);color:var(--red,#ef4444);}
.wc-fb-retry{background:rgba(251,146,60,.12);color:#f97316;}
.wc-fb-good{background:rgba(74,222,128,.12);color:var(--green,#4ade80);}
.btn-ghost{background:transparent;border:1px solid currentColor;opacity:.7;padding:4px 12px;border-radius:8px;cursor:pointer;color:inherit;}
.wc-examples{width:100%;max-width:380px;background:var(--surface);border-radius:14px;padding:12px 16px;display:flex;flex-direction:column;gap:6px;}
.wc-ex-title{font-size:.72rem;color:var(--text2);text-transform:uppercase;letter-spacing:.6px;margin-bottom:2px;}
.wc-ex-row{font-size:.95rem;padding:3px 0;border-bottom:1px solid var(--border);display:flex;gap:8px;align-items:baseline;}
.wc-ex-row:last-child{border:none;}
.wc-ex-word{font-weight:700;}
.wc-ex-hl{color:var(--accent);}
.wc-ex-tr{color:var(--text2);font-size:.88rem;}
/* ─── Reading exercise ──────────────────────────────────────────────────── */
.reading-wrap{display:flex;flex-direction:column;gap:16px;padding:4px 0;}
.reading-book{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px 20px;position:relative;}
.reading-book::before{content:'📖';position:absolute;top:12px;right:14px;font-size:1.1rem;opacity:.5;}
.reading-src{font-size:.72rem;color:var(--text2);margin-bottom:10px;font-style:italic;}
.reading-sentence{font-size:1.12rem;line-height:1.7;color:var(--text1);}
.reading-blank{display:inline-block;min-width:80px;border-bottom:2px solid var(--accent);padding:0 4px;text-align:center;font-weight:700;color:var(--accent);cursor:pointer;}

/* ─── Voice AI Screen ──────────────────────────────────────────────────────── */
.screen-voice{display:flex;flex-direction:column;}
.voice-screen-body{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:20px 20px 28px;gap:16px;overflow:hidden;}

/* Orb container */
.ai-container{position:relative;width:220px;height:220px;display:flex;align-items:center;justify-content:center;flex-shrink:0;}

/* Core orb */
.ai-container .orb{position:absolute;width:100px;height:100px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#a78bfa,#7c3aed 60%,#4c1d95);box-shadow:0 0 30px rgba(124,58,237,.5),0 0 60px rgba(124,58,237,.25);z-index:3;transition:transform .3s;}

/* Wave rings */
.ai-container .wave{position:absolute;border-radius:50%;border:2px solid rgba(167,139,250,.4);animation:none;z-index:1;}
.ai-container .wave:nth-child(1){width:120px;height:120px;}
.ai-container .wave:nth-child(2){width:150px;height:150px;border-color:rgba(167,139,250,.25);}
.ai-container .wave:nth-child(3){width:185px;height:185px;border-color:rgba(167,139,250,.12);}

/* Energy rings */
.ai-container .energy-ring{position:absolute;border-radius:50%;border:1px solid transparent;z-index:2;}
.ai-container .energy-ring:nth-child(4){width:112px;height:112px;}
.ai-container .energy-ring:nth-child(5){width:130px;height:130px;}
.ai-container .energy-ring:nth-child(6){width:148px;height:148px;}

/* Droplets */
.ai-container .droplets{position:absolute;width:100%;height:100%;z-index:4;}
.ai-container .drop{position:absolute;width:8px;height:8px;border-radius:50%;background:#a78bfa;opacity:0;top:50%;left:50%;transform:translate(-50%,-50%);}

/* Particles */
.ai-container .particles{position:absolute;width:100%;height:100%;z-index:5;}
.ai-container .particles span{position:absolute;width:4px;height:4px;border-radius:50%;background:#c4b5fd;opacity:0;}

/* ─── IDLE state ─── */
@keyframes idlePulse{0%,100%{transform:scale(1);box-shadow:0 0 30px rgba(124,58,237,.5),0 0 60px rgba(124,58,237,.25);}50%{transform:scale(1.04);box-shadow:0 0 40px rgba(124,58,237,.7),0 0 80px rgba(124,58,237,.35);}}
@keyframes idleWave{0%,100%{transform:scale(1);opacity:.6;}50%{transform:scale(1.06);opacity:.3;}}
.ai-container.idle .orb{animation:idlePulse 3s ease-in-out infinite;}
.ai-container.idle .wave{animation:idleWave 3s ease-in-out infinite;}
.ai-container.idle .wave:nth-child(2){animation-delay:.6s;}
.ai-container.idle .wave:nth-child(3){animation-delay:1.2s;}

/* ─── LISTENING state ─── */
@keyframes listenOrb{0%,100%{transform:scale(1);}25%{transform:scale(1.08);}75%{transform:scale(.96);}}
@keyframes listenWave{0%{transform:scale(1);opacity:.7;}50%{transform:scale(1.2);opacity:0;}100%{transform:scale(1);opacity:.7;}}
@keyframes dropOrbit{0%{transform:translate(-50%,-50%) rotate(0deg) translateX(65px) scale(1);opacity:.9;}50%{transform:translate(-50%,-50%) rotate(180deg) translateX(65px) scale(.6);opacity:.5;}100%{transform:translate(-50%,-50%) rotate(360deg) translateX(65px) scale(1);opacity:.9;}}
.ai-container.listening .orb{animation:listenOrb 1.2s ease-in-out infinite;background:radial-gradient(circle at 35% 35%,#6ee7b7,#10b981 60%,#065f46);;box-shadow:0 0 30px rgba(16,185,129,.5),0 0 60px rgba(16,185,129,.25);}
.ai-container.listening .wave{animation:listenWave 1.2s ease-out infinite;}
.ai-container.listening .wave:nth-child(2){animation-delay:.4s;}
.ai-container.listening .wave:nth-child(3){animation-delay:.8s;}
.ai-container.listening .drop{animation:dropOrbit 2s linear infinite;opacity:.9;}
.ai-container.listening .drop:nth-child(1){animation-delay:0s;}
.ai-container.listening .drop:nth-child(2){animation-delay:.33s;}
.ai-container.listening .drop:nth-child(3){animation-delay:.66s;}
.ai-container.listening .drop:nth-child(4){animation-delay:1s;}
.ai-container.listening .drop:nth-child(5){animation-delay:1.33s;}
.ai-container.listening .drop:nth-child(6){animation-delay:1.66s;}

/* ─── THINKING state ─── */
@keyframes thinkOrb{0%,100%{transform:scale(1) rotate(0deg);}50%{transform:scale(1.05) rotate(180deg);}}
@keyframes energyPulse{0%{transform:scale(1);opacity:.8;border-color:rgba(251,191,36,.6);}50%{transform:scale(1.15);opacity:.3;border-color:rgba(251,191,36,.2);}100%{transform:scale(1);opacity:.8;border-color:rgba(251,191,36,.6);}}
@keyframes floatParticle{0%{transform:translate(0,0);opacity:0;}20%{opacity:.8;}80%{opacity:.6;}100%{transform:translate(var(--tx,20px),var(--ty,-40px));opacity:0;}}
.ai-container.thinking .orb{animation:thinkOrb 2s ease-in-out infinite;background:radial-gradient(circle at 35% 35%,#fde68a,#f59e0b 60%,#92400e);box-shadow:0 0 30px rgba(245,158,11,.5),0 0 60px rgba(245,158,11,.25);}
.ai-container.thinking .energy-ring{animation:energyPulse 1.5s ease-in-out infinite;border-color:rgba(251,191,36,.6);}
.ai-container.thinking .energy-ring:nth-child(5){animation-delay:.5s;}
.ai-container.thinking .energy-ring:nth-child(6){animation-delay:1s;}
.ai-container.thinking .particles span{animation:floatParticle 2s ease-out infinite;}
.ai-container.thinking .particles span:nth-child(1){top:40%;left:60%;--tx:30px;--ty:-50px;animation-delay:0s;}
.ai-container.thinking .particles span:nth-child(2){top:55%;left:35%;--tx:-25px;--ty:-45px;animation-delay:.5s;}
.ai-container.thinking .particles span:nth-child(3){top:45%;left:55%;--tx:20px;--ty:-55px;animation-delay:1s;}
.ai-container.thinking .particles span:nth-child(4){top:50%;left:45%;--tx:-30px;--ty:-40px;animation-delay:1.5s;}

/* ─── SPEAKING state ─── */
@keyframes speakOrb{0%,100%{transform:scaleY(1);}20%{transform:scaleY(1.1);}40%{transform:scaleY(.93);}60%{transform:scaleY(1.07);}80%{transform:scaleY(.97);}}
@keyframes speakWave{0%,100%{transform:scale(1);opacity:.5;}30%{transform:scale(1.15);opacity:.8;}70%{transform:scale(1.08);opacity:.6;}}
.ai-container.speaking .orb{animation:speakOrb .6s ease-in-out infinite;background:radial-gradient(circle at 35% 35%,#93c5fd,#3b82f6 60%,#1e3a8a);box-shadow:0 0 30px rgba(59,130,246,.5),0 0 60px rgba(59,130,246,.25);}
.ai-container.speaking .wave{animation:speakWave .6s ease-in-out infinite;}
.ai-container.speaking .wave:nth-child(2){animation-duration:.8s;animation-delay:.1s;}
.ai-container.speaking .wave:nth-child(3){animation-duration:1s;animation-delay:.2s;}

/* ─── Voice screen UI ─── */
.voice-status-label{font-size:.95rem;color:var(--text2);text-align:center;min-height:1.4em;transition:color .3s;}
.voice-transcript-area{flex:1;width:100%;overflow-y:auto;display:flex;flex-direction:column;gap:8px;padding:4px 0;}
.vt-bubble{padding:10px 14px;border-radius:14px;font-size:.9rem;line-height:1.45;max-width:90%;word-break:break-word;}
.vt-bubble.user{background:rgba(124,58,237,.15);color:var(--text1);align-self:flex-end;border-bottom-right-radius:4px;}
.vt-bubble.ai{background:var(--surface);color:var(--text1);align-self:flex-start;border-bottom-left-radius:4px;}
.voice-main-mic{width:64px;height:64px;border-radius:50%;border:none;font-size:1.6rem;cursor:pointer;background:var(--accent);color:#fff;box-shadow:0 4px 18px rgba(124,58,237,.45);transition:transform .15s,background .2s;flex-shrink:0;}
.voice-main-mic:hover{transform:scale(1.08);}
.voice-main-mic.recording{background:#ef4444;box-shadow:0 4px 18px rgba(239,68,68,.5);animation:micPulse 1s ease-in-out infinite;}
@keyframes micPulse{0%,100%{transform:scale(1);}50%{transform:scale(1.12);}}
.reading-q{font-size:.88rem;color:var(--text2);margin-top:8px;}

/* ─── Chat Mode Picker ──────────────────────────────────────────────────────── */
.chat-mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.chat-mode-card{display:flex;flex-direction:column;align-items:center;gap:6px;padding:20px 12px;border-radius:16px;border:2px solid var(--border);background:var(--card);cursor:pointer;transition:all .2s;text-align:center;color:var(--text1);}
.chat-mode-card:hover{border-color:var(--accent);background:rgba(124,58,237,.06);transform:translateY(-2px);}
.chat-mode-card.selected{border-color:var(--accent);background:rgba(124,58,237,.1);box-shadow:0 0 0 1px var(--accent);}
.chat-mode-icon{font-size:2rem;line-height:1;}
.chat-mode-label{font-size:.9rem;font-weight:700;}
.chat-mode-desc{font-size:.75rem;color:var(--text2);}
/* History mode badge */
.chat-hist-mode{font-size:.75rem;padding:1px 6px;border-radius:6px;background:var(--bg3);color:var(--text2);flex-shrink:0;}

/* ─── Mobile Touch ──────────────────────────────────────────────── */
* { -webkit-tap-highlight-color: transparent; }
button { touch-action: manipulation; }
input, textarea { touch-action: manipulation; }

/* ─── Sidebar (desktop) ──────────────────────────────────────────── */
#sidebar {
  display: none;
  flex-direction: column;
  width: 240px;
  flex-shrink: 0;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width .22s cubic-bezier(.4,0,.2,1);
}
/* Collapse toggle button — sits below Settings inside .sb-nav */
.sb-collapse-btn {
  display: flex; align-items: center; gap: 11px;
  padding: 8px 12px; border-radius: 9px; font-size: .8rem; font-weight: 500;
  color: var(--text3); background: transparent; border: 1px solid transparent;
  cursor: pointer; transition: all var(--trans); text-align: left; width: 100%;
  margin-top: 4px;
}
.sb-collapse-btn:hover { background: var(--bg3); color: var(--text2); }
.sb-collapse-icon { font-size: 1.1rem; display: inline-block; transition: transform .22s cubic-bezier(.4,0,.2,1); }
/* Collapsed state */
#sidebar.collapsed { width: 64px; }
#sidebar.collapsed .sb-logo { padding: 16px 0; justify-content: center; }
#sidebar.collapsed .sb-logo-text { display: none; }
#sidebar.collapsed .sb-nav { padding: 10px 8px; }
#sidebar.collapsed .sb-item { justify-content: center; padding: 10px 6px; gap: 0; }
#sidebar.collapsed .sb-item-lbl { display: none; }
#sidebar.collapsed .sb-collapse-lbl { display: none; }
#sidebar.collapsed .sb-collapse-btn { justify-content: center; padding: 10px 6px; gap: 0; }
#sidebar.collapsed .sb-collapse-icon { transform: rotate(180deg); }
#sidebar.collapsed .sb-user { padding: 10px 0; justify-content: center; gap: 0; }
#sidebar.collapsed .sb-user-info { display: none; }
.sb-logo {
  display: flex; align-items: center; gap: 9px;
  padding: 18px 20px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.sb-logo-text {
  font-size: 1.1rem; font-weight: 800; letter-spacing: -.5px; color: var(--text);
}
.sb-logo-text span { color: var(--green); }
.sb-lang-section {
  padding: 14px 16px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
.sb-lang-caption {
  font-size: .62rem; font-weight: 800; color: var(--text3);
  text-transform: uppercase; letter-spacing: .1em; margin-bottom: 7px;
}
.sb-lang-btn {
  width: 100%; background: var(--bg3); border: 1px solid var(--border2);
  border-radius: 10px; padding: 9px 11px; display: flex; align-items: center;
  gap: 9px; font-size: .85rem; font-weight: 600; color: var(--text);
  cursor: pointer; transition: all var(--trans);
}
.sb-lang-btn:hover { background: var(--border); }
.sb-lang-arrow { font-size: .6rem; color: var(--text3); margin-left: auto; }
.sb-nav {
  flex: 1; padding: 14px 12px; display: flex; flex-direction: column; gap: 3px;
}
.sb-item {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: 9px; font-size: .875rem; font-weight: 500;
  color: var(--text2); background: transparent; border: 1px solid transparent;
  cursor: pointer; transition: all var(--trans); text-align: left; width: 100%;
}
.sb-item:hover { background: var(--bg3); color: var(--text); }
.sb-item.active {
  font-weight: 700; color: var(--green);
  background: rgba(88,204,2,.12); border-color: rgba(88,204,2,.25);
}
.sb-item-icon { font-size: 1.05rem; }
.sb-user {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; border-top: 1px solid var(--border); flex-shrink: 0;
}
.sb-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--blue));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.sb-user-info { flex: 1; min-width: 0; }
.sb-user-name { font-size: .82rem; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sb-user-xp { font-size: .7rem; color: var(--text2); margin-top: 2px; }
/* Sidebar logo — theme-aware */
.sb-logo-text {
  font-size: 1rem; font-weight: 900; letter-spacing: -.5px;
  background: linear-gradient(120deg, var(--blue), var(--green));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sb-logo-text span { -webkit-text-fill-color: transparent; }

/* Desktop layout (sidebar + main) */
@media (min-width: 680px) {
  #app.sb-active {
    flex-direction: row;
  }
  #app.sb-active #sidebar { display: flex; }
  #app.sb-active .screen.active {
    flex: 1; min-width: 0;
  }
  #app.sb-active .bottom-nav { display: none !important; }
  #app.sb-active #screen-home .course-map { padding-bottom: 24px; }
  #app.sb-active .sett-section { padding-bottom: 24px; }

  /* Home: two-column layout on desktop */
  #screen-home .home-body { flex-direction: row; }
  #screen-home .home-main { flex: 1; overflow: hidden; }
  #screen-home .home-practice {
    width: 220px; flex-shrink: 0; border-top: none;
    border-left: 1px solid var(--border); display: flex;
    flex-direction: column; overflow-y: auto;
  }
  #screen-home .hp-title { padding: 20px 16px 8px; }
  #screen-home .home-tiles {
    flex-direction: column; overflow-x: visible;
    padding: 4px 12px 16px; gap: 6px;
  }
  #screen-home .home-tile {
    flex-direction: row; justify-content: flex-start; width: 100%;
    min-width: unset; padding: 10px 14px; gap: 10px; border-radius: 12px;
  }
  #screen-home .home-tile-icon { font-size: 1.2rem; }
  /* Course-map scroll fix inside home-main */
  #screen-home .course-map { min-height: 0; }
}

/* ─── Mobile safe areas ─────────────────────────────────────────── */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .bottom-nav { padding-bottom: max(env(safe-area-inset-bottom), 4px); height: calc(60px + env(safe-area-inset-bottom)); }
  .home-practice { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  #screen-chat { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  #screen-vocab #vocab-list-wrap,
  #screen-vocab #vocab-alpha-panel { padding-bottom: calc(76px + env(safe-area-inset-bottom)); }
  .sett-section { padding-bottom: calc(96px + env(safe-area-inset-bottom)); }
}

/* ─── Responsive touch targets ───────────────────────────────────── */
@media (max-width: 480px) {
  .btn { padding: 16px 24px; }
  .option-btn { padding: 18px 12px; min-height: 56px; }
  .match-btn { min-height: 60px; }
  .topic-card { padding: 18px 8px 14px; }
  .tc-icon { font-size: 2.1rem; }
  .lang-card { padding: 20px 8px 16px; }
}

/* ══ MOBILE SETTINGS: tabs fit without scroll ═══════════════════════════════ */
@media (max-width: 679px) {
  .sett-tabs {
    overflow-x: visible;
    flex-wrap: nowrap;
    padding: 8px 10px;
    gap: 6px;
  }
  .sett-tab {
    flex: 1;
    text-align: center;
    padding: 7px 4px;
    font-size: .72rem;
    white-space: nowrap;
    min-width: 0;
  }
  .sett-content { overflow: hidden; }
  .sett-section.active {
    overflow-y: auto;
    padding: 16px 14px calc(80px + env(safe-area-inset-bottom));
    gap: 16px;
  }
  .sett-section .sett-row { flex-shrink: 0; }
}

/* ══ MOBILE HOME: practice panel collapsible ════════════════════════════════ */
@media (max-width: 679px) {
  .home-practice { flex-shrink: 0; }
  .hp-toggle-btn {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 16px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: .72rem;
    font-weight: 700;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: .07em;
  }
  .hp-toggle-icon { transition: transform .25s; display: inline-block; }
  .home-practice.collapsed .hp-toggle-icon { transform: rotate(-90deg); }
  .home-practice.collapsed .hp-body { display: none; }
  .hp-title { display: none; }
}
@media (min-width: 680px) {
  .hp-toggle-btn { display: none; }
}