/* ================================================================
   Owl's Academy — Main Stylesheet
   ================================================================ */

/* ── RESET & ROOT ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --cream:        #faf7f2;
  --cream-dark:   #f2ede4;
  --ink:          #1a1410;
  --ink-60:       rgba(26,20,16,.6);
  --ink-30:       rgba(26,20,16,.3);
  --amber:        #d4800a;
  --amber-light:  #f5c842;
  --amber-bg:     #fff8e8;
  --teal:         #2a7c76;
  --teal-light:   #e8f5f4;
  --coral:        #e85d3a;
  --coral-light:  #fdf0ec;
  --purple:       #5b3fa6;
  --purple-light: #f0ecfb;
  --green:        #2a7c76;
  --red:          #e85d3a;
  --blue-mid:     #d4800a;
  --border:       #e2dcd4;
  --card-shadow:  0 2px 16px rgba(26,20,16,.07);
  --card-shadow-lg: 0 8px 32px rgba(26,20,16,.12);
  --radius:       16px;
  --radius-sm:    10px;
  --font-serif:   'Playfair Display', Georgia, serif;
  --font-sans:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;
}

/* ── BASE ─────────────────────────────────────────────────────── */
body {
  font-family: var(--font-sans);
  background: var(--cream);
  color: var(--ink);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4 { font-family: var(--font-serif); line-height: 1.2; }

a { color: var(--amber); }
a:hover { color: var(--teal); }

img { max-width: 100%; display: block; border-radius: var(--radius-sm); }

button { cursor: pointer; font-family: var(--font-sans); }

input, textarea, select {
  font-family: var(--font-sans);
  font-size: .9rem;
  color: var(--ink);
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--amber);
  outline-offset: 1px;
}

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


/* ═══════════════════════════════════════════════════════════════
   INDEX PAGE (student portal)
   ═══════════════════════════════════════════════════════════════ */

.portal-hero {
  background: linear-gradient(135deg, var(--ink) 0%, #2d1e14 60%, #3d2a1a 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
}

.portal-hero-inner {
  text-align: center;
  width: 100%;
  max-width: 440px;
}

.portal-logo {
  font-size: 3.5rem;
  margin-bottom: .5rem;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%,100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

.portal-title {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  color: white;
  margin-bottom: .4rem;
}

.portal-sub {
  color: rgba(255,255,255,.6);
  font-size: 1rem;
  margin-bottom: 2.5rem;
}

.login-card {
  background: rgba(255,255,255,.09);
  border: 1.5px solid rgba(255,255,255,.18);
  border-radius: var(--radius);
  padding: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.login-card label {
  display: block;
  color: rgba(255,255,255,.85);
  font-weight: 600;
  font-size: .9rem;
  margin-bottom: .6rem;
  text-align: left;
}

.login-card input {
  width: 100%;
  padding: 13px 16px;
  background: rgba(255,255,255,.12);
  border: 1.5px solid rgba(255,255,255,.25);
  border-radius: var(--radius-sm);
  color: white;
  font-size: 1.05rem;
  transition: border .2s;
}
.login-card input::placeholder { color: rgba(255,255,255,.4); }
.login-card input:focus { border-color: var(--amber-light); outline: none; }

.login-btn {
  display: block;
  width: 100%;
  margin-top: 1rem;
  padding: 13px;
  background: var(--amber-light);
  color: var(--ink);
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: .02em;
  transition: all .2s;
}
.login-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.25); }
.login-btn:active { transform: translateY(0); }
.login-btn:disabled { opacity: .6; transform: none; }

.login-err {
  color: #ffb3b3;
  font-size: .86rem;
  margin-top: .7rem;
  display: none;
  text-align: left;
  font-weight: 600;
}

.portal-note {
  color: rgba(255,255,255,.4);
  font-size: .8rem;
  margin-top: 1.5rem;
}

/* Dashboard */
.dashboard { max-width: 900px; margin: 0 auto; padding: 2rem 1.5rem 5rem; }

.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 2px solid var(--border);
}

.dash-greeting { font-size: 1.5rem; color: var(--ink); }
.dash-greeting span { color: var(--amber); }

.logout-btn {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 16px;
  font-weight: 600;
  font-size: .85rem;
  color: var(--ink-60);
  transition: all .2s;
}
.logout-btn:hover { border-color: var(--coral); color: var(--coral); }

/* Stats strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 2rem;
}

.stat-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.2rem 1rem;
  text-align: center;
  box-shadow: var(--card-shadow);
}
.stat-card .stat-val {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--amber);
  display: block;
  line-height: 1;
  margin-bottom: .25rem;
}
.stat-card .stat-lbl { font-size: .78rem; color: var(--ink-60); font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }

/* SRS review banner */
.srs-banner {
  background: linear-gradient(135deg, var(--teal) 0%, #1d5e59 100%);
  border-radius: var(--radius);
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.8rem;
  flex-wrap: wrap;
}
.srs-banner p { color: white; font-weight: 600; }
.srs-banner p span { color: var(--amber-light); font-size: 1.3em; }
.srs-go-btn {
  background: var(--amber-light);
  color: var(--ink);
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 20px;
  font-weight: 800;
  font-size: .9rem;
  white-space: nowrap;
  transition: all .2s;
}
.srs-go-btn:hover { transform: scale(1.04); }

/* Lessons section */
.section-hdr {
  font-size: 1.15rem;
  color: var(--ink);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}

.lesson-card {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 1.3rem 1.5rem;
  margin-bottom: .85rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  text-decoration: none;
  color: inherit;
  transition: all .2s;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
}
.lesson-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--border);
  transition: background .2s;
}
.lesson-card:hover { border-color: var(--amber); transform: translateY(-2px); box-shadow: var(--card-shadow-lg); }
.lesson-card:hover::before { background: var(--amber); }

.lesson-card.done::before { background: var(--teal); }
.lesson-card.locked { opacity: .55; pointer-events: none; }

.lc-emoji { font-size: 1.8rem; flex-shrink: 0; }
.lc-info { flex: 1; min-width: 0; }
.lc-title { font-weight: 700; font-size: 1.05rem; margin-bottom: .2rem; }
.lc-sub { font-size: .84rem; color: var(--ink-60); margin-bottom: .5rem; }
.lc-meta { display: flex; flex-wrap: wrap; gap: .4rem; }
.lc-progress { margin-left: auto; flex-shrink: 0; text-align: right; }
.lc-pct { font-weight: 800; font-size: 1.1rem; color: var(--amber); }
.lc-due { font-size: .75rem; color: var(--coral); font-weight: 600; }

.chip {
  display: inline-flex;
  align-items: center;
  background: var(--cream-dark);
  color: var(--ink);
  border-radius: 20px;
  padding: 2px 10px;
  font-size: .74rem;
  font-weight: 600;
  white-space: nowrap;
}
.chip.level { background: var(--teal-light); color: var(--teal); }
.chip.amber { background: var(--amber-bg); color: var(--amber); }
.chip.coral { background: var(--coral-light); color: var(--coral); }

.no-lessons { text-align: center; padding: 3rem 1rem; color: var(--ink-60); }
.no-lessons p { font-size: 1.1rem; margin-bottom: .5rem; }


/* ═══════════════════════════════════════════════════════════════
   LESSON PAGE
   ═══════════════════════════════════════════════════════════════ */

.nav-bar {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--ink);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-bar::-webkit-scrollbar { display: none; }

.nav-back {
  color: rgba(255,255,255,.5);
  background: transparent;
  border: none;
  border-radius: 8px;
  padding: 7px 12px;
  font-size: .82rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all .2s;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-back:hover { background: rgba(255,255,255,.1); color: white; }

.nav-divider { width: 1px; height: 20px; background: rgba(255,255,255,.15); flex-shrink: 0; margin: 0 4px; }

.nav-tabs { display: flex; flex: 1; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.nav-tabs::-webkit-scrollbar { display: none; }

.nav-tab {
  background: transparent;
  color: rgba(255,255,255,.5);
  border: none;
  border-radius: 8px;
  padding: 7px 14px;
  font-size: .82rem;
  font-family: var(--font-sans);
  font-weight: 500;
  white-space: nowrap;
  transition: all .2s;
}
.nav-tab:hover { background: rgba(255,255,255,.08); color: rgba(255,255,255,.85); }
.nav-tab.active { background: var(--amber); color: var(--ink); font-weight: 700; }

.save-indicator {
  color: rgba(255,255,255,.4);
  font-size: .72rem;
  padding: 0 8px;
  white-space: nowrap;
  font-weight: 500;
  transition: opacity .5s;
  flex-shrink: 0;
}

.tab-panel { display: none; max-width: 860px; margin: 0 auto; padding: 40px 24px 100px; }
.tab-panel.active { display: block; }

.lesson-header { text-align: center; margin-bottom: 48px; }
.lesson-header .badge { margin-bottom: 12px; }
.lesson-header h1 { font-size: clamp(1.9rem, 5vw, 2.9rem); margin-bottom: .75rem; }
.lesson-header p { font-size: 1rem; color: var(--ink-60); max-width: 520px; margin: 0 auto; }

/* ── BLOCK WRAPPER ─────────────────────────────────────────────── */
.block-wrap { margin-bottom: 28px; }

/* ── CARDS ─────────────────────────────────────────────────────── */
.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--card-shadow);
}
.card h3 { font-size: 1.05rem; margin-bottom: 14px; color: var(--ink); }
.card h3 small { font-size: .78rem; font-family: var(--font-sans); color: var(--ink-60); font-weight: 400; margin-left: .5rem; }
.card.green  { border-top: 3px solid var(--teal); }
.card.teal   { border-top: 3px solid var(--teal); }
.card.yellow { border-top: 3px solid var(--amber-light); }
.card.amber  { border-top: 3px solid var(--amber); }
.card.red    { border-top: 3px solid var(--coral); }
.card.coral  { border-top: 3px solid var(--coral); }
.card.purple { border-top: 3px solid var(--purple); }
.card.orange { border-top: 3px solid var(--amber); }

/* ── BADGE ─────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  background: var(--amber);
  color: var(--ink);
  font-weight: 700;
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  font-family: var(--font-sans);
}
.badge.teal { background: var(--teal); color: white; }
.badge.coral { background: var(--coral); color: white; }
.badge.purple { background: var(--purple); color: white; }

/* ── QUOTE BLOCK ───────────────────────────────────────────────── */
.quote-block {
  background: linear-gradient(135deg, var(--ink) 0%, #2d1e14 100%);
  border-radius: var(--radius);
  padding: 2rem 2.5rem;
  position: relative;
  overflow: hidden;
}
.quote-block::before {
  content: '\201C';
  position: absolute;
  top: -10px; left: 16px;
  font-size: 8rem;
  color: rgba(255,255,255,.07);
  font-family: Georgia, serif;
  line-height: 1;
}
.quote-block p { font-family: Georgia, serif; font-size: 1.15rem; color: white; line-height: 1.6; position: relative; }
.quote-block cite { display: block; margin-top: 12px; font-size: .82rem; color: var(--amber-light); font-style: normal; font-weight: 600; }

/* ── ARTICLE / READING BOX ─────────────────────────────────────── */
.reading-box {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--card-shadow);
  border-left: 4px solid var(--amber);
}
.reading-box h3 { font-size: 1.1rem; margin-bottom: 6px; }
.reading-text { font-size: .95rem; line-height: 1.9; color: var(--ink); }
.reading-text .hl { background: #fff3b0; border-radius: 3px; padding: 0 2px; }
.reading-text .hl-green { background: #c8f5c0; border-radius: 3px; padding: 0 2px; }

/* ── VOCAB GRID ─────────────────────────────────────────────────── */
.vocab-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(145px, 1fr)); gap: 12px; }
.vocab-item {
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  position: relative;
}
.vocab-item:hover { border-color: var(--amber); background: var(--amber-bg); transform: translateY(-2px); }
.vocab-item .vi-emoji { font-size: 1.8rem; margin-bottom: 4px; display: block; }
.vocab-item .vi-pl { font-weight: 700; font-size: .92rem; }
.vocab-item .vi-en { font-size: .78rem; color: var(--teal); margin-top: 4px; display: none; }
.vocab-item .vi-hint { font-size: .75rem; color: var(--ink-60); font-style: italic; margin-top: 3px; display: none; }
.vocab-item .vi-flip-hint { font-size: .68rem; color: var(--ink-30); margin-top: 4px; }
.vocab-item.revealed .vi-en { display: block; }
.vocab-item.revealed .vi-hint { display: block; }
.vocab-item.revealed .vi-flip-hint { display: none; }
.vocab-item.revealed { border-color: var(--teal); }

.save-word-btn {
  position: absolute;
  top: 5px; right: 5px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 5px;
  font-size: .65rem;
  color: var(--ink-30);
  opacity: 0;
  transition: all .2s;
}
.vocab-item:hover .save-word-btn { opacity: 1; }
.save-word-btn.saved { background: var(--teal); color: white; border-color: var(--teal); opacity: 1; }

/* ── FLASHCARDS (SM-2) ─────────────────────────────────────────── */
.flashcard-scene {
  width: 100%;
  max-width: 480px;
  height: 280px;
  margin: 0 auto 1.5rem;
  perspective: 1000px;
  cursor: pointer;
}
.flashcard {
  width: 100%; height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform .5s cubic-bezier(.4,0,.2,1);
}
.flashcard.flipped { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--card-shadow-lg);
}
.flashcard-front {
  background: var(--ink);
  color: white;
}
.flashcard-front .fc-emoji { font-size: 2.5rem; margin-bottom: .75rem; }
.flashcard-front .fc-word { font-family: var(--font-serif); font-size: 1.7rem; margin-bottom: .5rem; }
.flashcard-front .fc-hint { font-size: .8rem; color: rgba(255,255,255,.45); }
.flashcard-back {
  background: white;
  border: 2px solid var(--border);
  transform: rotateY(180deg);
}
.flashcard-back .fc-def { font-size: 1.05rem; color: var(--ink); margin-bottom: .75rem; font-weight: 600; }
.flashcard-back .fc-ex { font-size: .88rem; color: var(--ink-60); font-style: italic; }

.fc-counter { text-align: center; font-size: .82rem; color: var(--ink-60); margin-bottom: .75rem; }
.fc-progress-bar { height: 4px; background: var(--border); border-radius: 2px; margin-bottom: 1.2rem; }
.fc-progress-fill { height: 100%; background: var(--amber); border-radius: 2px; transition: width .4s; }

.fc-rating { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 1rem; }
.fc-rating button {
  padding: 9px 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: white;
  font-size: .82rem;
  font-weight: 700;
  transition: all .2s;
}
.fc-rating .btn-blackout { border-color: var(--coral); color: var(--coral); }
.fc-rating .btn-hard     { border-color: var(--amber); color: var(--amber); }
.fc-rating .btn-good     { border-color: var(--teal);  color: var(--teal); }
.fc-rating .btn-easy     { border-color: var(--purple); color: var(--purple); }
.fc-rating button:hover  { transform: translateY(-2px); }

.fc-srs-label { font-size: .68rem; color: var(--ink-30); display: block; margin-top: 3px; }
.fc-done-screen { text-align: center; padding: 2.5rem 1rem; }
.fc-done-screen .fc-done-emoji { font-size: 3rem; margin-bottom: 1rem; }
.fc-done-screen h3 { margin-bottom: .5rem; }
.fc-done-screen p { color: var(--ink-60); font-size: .92rem; }

/* ── EXERCISES ─────────────────────────────────────────────────── */
.check-btn {
  background: var(--amber);
  color: var(--ink);
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 24px;
  font-weight: 700;
  font-size: .88rem;
  transition: all .2s;
  margin-top: 12px;
}
.check-btn:hover { background: var(--ink); color: var(--amber-light); transform: translateY(-1px); }
.check-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.exercise-feedback {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: .88rem;
  font-weight: 600;
  display: none;
}
.exercise-feedback.correct { background: var(--teal-light); color: var(--teal); border: 1px solid var(--teal); }
.exercise-feedback.incorrect { background: var(--coral-light); color: var(--coral); border: 1px solid var(--coral); }
.exercise-feedback.show { display: block; }

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 11px 16px;
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-size: .92rem;
  transition: all .2s;
}
.quiz-option:hover { border-color: var(--amber); background: var(--amber-bg); }
.quiz-option.correct { background: var(--teal-light); border-color: var(--teal); color: var(--teal); }
.quiz-option.incorrect { background: var(--coral-light); border-color: var(--coral); color: var(--coral); }

.gap-input {
  border: none;
  border-bottom: 2px solid var(--amber);
  padding: 2px 8px;
  background: transparent;
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--ink);
  min-width: 80px;
  text-align: center;
  transition: border-color .2s;
}
.gap-input:focus { outline: none; border-color: var(--teal); }
.gap-input.correct { border-color: var(--teal); color: var(--teal); }
.gap-input.incorrect { border-color: var(--coral); color: var(--coral); }

.word-chip {
  display: inline-block;
  padding: 4px 12px;
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: .86rem;
  font-weight: 600;
  margin: 4px;
  transition: all .2s;
  cursor: pointer;
}
.word-chip:hover { border-color: var(--amber); background: var(--amber-bg); }
.word-chip.selected { background: var(--amber); border-color: var(--amber); color: var(--ink); }
.word-chip.used { opacity: .35; pointer-events: none; }

.drag-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: .86rem;
  font-weight: 600;
  margin: 4px;
  cursor: grab;
  transition: all .2s;
  user-select: none;
}
.drag-chip:active { cursor: grabbing; opacity: .7; }
.drag-chip.drag-over { border-color: var(--amber); background: var(--amber-bg); }

.matching-col { display: flex; flex-direction: column; gap: 8px; }
.match-item {
  padding: 10px 14px;
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  cursor: pointer;
  transition: all .2s;
}
.match-item:hover { border-color: var(--amber); background: var(--amber-bg); }
.match-item.selected { background: var(--amber-bg); border-color: var(--amber); }
.match-item.matched.correct { background: var(--teal-light); border-color: var(--teal); cursor: default; }
.match-item.matched.incorrect { background: var(--coral-light); border-color: var(--coral); }

/* ── TF ────────────────────────────────────────────────────────── */
.tf-btns { display: flex; gap: 6px; margin-top: 8px; }
.tf-btn {
  padding: 6px 14px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 700;
  background: white;
  transition: all .2s;
}
.tf-btn:hover { border-color: var(--amber); }
.tf-btn.selected.correct { background: var(--teal); border-color: var(--teal); color: white; }
.tf-btn.selected.incorrect { background: var(--coral); border-color: var(--coral); color: white; }

/* ── SPEAKING ──────────────────────────────────────────────────── */
.speak-card {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  margin-bottom: 12px;
  box-shadow: var(--card-shadow);
}
.speak-num {
  width: 28px; height: 28px;
  background: var(--ink);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: .82rem; font-weight: 700;
  margin-bottom: 8px; flex-shrink: 0;
}

.timer-display {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  color: var(--amber);
  text-align: center;
  margin: 1rem 0;
}
.timer-display.running { color: var(--teal); }
.timer-display.finished { color: var(--coral); }

.wyr-wrap { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: center; margin-bottom: 12px; }
.wyr-option {
  background: white;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  text-align: center;
  font-weight: 600;
  font-size: .95rem;
  cursor: pointer;
  transition: all .2s;
}
.wyr-option:hover { border-color: var(--amber); background: var(--amber-bg); transform: scale(1.02); }
.wyr-vs { font-weight: 900; color: var(--ink-60); font-size: .9rem; text-align: center; }

/* ── PROGRESS BAR ──────────────────────────────────────────────── */
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--amber); border-radius: 3px; transition: width .4s ease; }

/* ── TTS BUTTON ────────────────────────────────────────────────── */
.tts-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
  font-size: .82rem;
  color: var(--ink-60);
  transition: all .2s;
  line-height: 1.4;
}
.tts-btn:hover { background: var(--amber-bg); border-color: var(--amber); color: var(--amber); }

/* ── LIGHTBOX ──────────────────────────────────────────────────── */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  animation: fadeIn .2s;
}
.lightbox-overlay img {
  max-width: 90vw;
  max-height: 88vh;
  border-radius: var(--radius);
  cursor: default;
  box-shadow: 0 20px 60px rgba(0,0,0,.5);
}
.lightbox-close {
  position: fixed;
  top: 1rem; right: 1.2rem;
  color: white;
  font-size: 1.8rem;
  background: none;
  border: none;
  cursor: pointer;
  opacity: .7;
  transition: opacity .2s;
}
.lightbox-close:hover { opacity: 1; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ── MYWORDS SECTION ───────────────────────────────────────────── */
.mywords-wrap { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 10px; }
.myword-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: .9rem;
}
.myword-card .mw-en { font-weight: 700; margin-bottom: 3px; }
.myword-card .mw-pl { font-size: .8rem; color: var(--ink-60); }

/* ── NOTES ─────────────────────────────────────────────────────── */
.notes-textarea {
  width: 100%;
  min-height: 100px;
  padding: 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  resize: vertical;
  background: white;
  transition: border-color .2s;
}
.notes-textarea:focus { border-color: var(--amber); outline: none; }

/* ── INSTRUCT BLOCK ────────────────────────────────────────────── */
.instruction-banner {
  background: var(--teal-light);
  border-left: 3px solid var(--teal);
  border-radius: 0 8px 8px 0;
  padding: 9px 14px;
  font-size: .86rem;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 14px;
}

/* ── OWN SENTENCES ─────────────────────────────────────────────── */
.own-textarea {
  width: 100%;
  min-height: 60px;
  padding: 10px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  resize: vertical;
  margin-top: 6px;
}

/* ── CTA BLOCK ─────────────────────────────────────────────────── */
.cta-block {
  background: linear-gradient(135deg, var(--ink) 0%, #3d2a1a 100%);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.cta-block .cta-label { font-size: .75rem; font-weight: 700; color: var(--amber-light); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 4px; }
.cta-block .cta-text { font-size: .95rem; color: white; font-weight: 600; }
.cta-action-btn {
  background: var(--amber-light);
  color: var(--ink);
  border: none;
  border-radius: var(--radius-sm);
  padding: 10px 22px;
  font-weight: 800;
  font-size: .9rem;
  white-space: nowrap;
  transition: all .2s;
}
.cta-action-btn:hover { transform: scale(1.04); }

/* ── COLLOCATION ───────────────────────────────────────────────── */
.colloc-options { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0; }
.colloc-chip {
  padding: 6px 14px;
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  font-size: .86rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
}
.colloc-chip.selected { background: var(--amber-bg); border-color: var(--amber); }
.colloc-chip.correct  { background: var(--teal-light); border-color: var(--teal); color: var(--teal); }
.colloc-chip.incorrect { background: var(--coral-light); border-color: var(--coral); color: var(--coral); }

/* ── WORD FORM TABLE ───────────────────────────────────────────── */
.wordform-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.wordform-table th { background: var(--ink); color: var(--cream); padding: 8px 12px; text-align: left; font-size: .8rem; letter-spacing: .05em; }
.wordform-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); }
.wordform-table tr:nth-child(even) td { background: var(--cream); }
.wordform-table .wf-given { font-weight: 600; color: var(--teal); }
.wordform-table .wf-dash { color: var(--ink-30); }
.wordform-input { border: none; border-bottom: 2px solid var(--amber); padding: 2px 6px; background: transparent; font-size: .88rem; width: 100%; }

/* ── PAIRS TABLE ───────────────────────────────────────────────── */
.pairs-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.pairs-table th { background: var(--teal); color: white; padding: 10px 14px; text-align: left; font-size: .82rem; }
.pairs-table td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.pairs-table tr:nth-child(even) td { background: var(--cream); }

/* ── FOOTER (lesson) ───────────────────────────────────────────── */
.lesson-footer {
  text-align: center;
  padding: 2rem;
  color: var(--ink-30);
  font-size: .8rem;
}


/* ═══════════════════════════════════════════════════════════════
   ADMIN PANEL
   ═══════════════════════════════════════════════════════════════ */

.admin-layout { display: flex; height: 100vh; overflow: hidden; }

.admin-sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--ink);
  color: white;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.sidebar-logo {
  padding: 1.5rem 1.2rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-logo span { font-size: 1.5rem; }
.sidebar-logo h2 { font-family: var(--font-serif); font-size: 1rem; color: white; margin-top: 4px; }
.sidebar-logo p { font-size: .72rem; color: rgba(255,255,255,.35); margin-top: 2px; }

.sidebar-nav { flex: 1; padding: .75rem 0; }
.nav-item {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .65rem 1.2rem;
  color: rgba(255,255,255,.55);
  font-size: .88rem;
  font-weight: 500;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: all .2s;
  text-decoration: none;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: rgba(255,255,255,.9); }
.nav-item.active { background: rgba(212,128,10,.15); color: var(--amber-light); }
.nav-item .ni-icon { font-size: 1rem; width: 20px; text-align: center; }

.sidebar-footer { padding: 1rem 1.2rem; border-top: 1px solid rgba(255,255,255,.08); }
.admin-email { font-size: .75rem; color: rgba(255,255,255,.3); margin-bottom: 8px; word-break: break-all; }
.logout-btn-sm {
  font-size: .78rem;
  color: rgba(255,255,255,.4);
  background: none;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
  transition: all .2s;
}
.logout-btn-sm:hover { border-color: var(--coral); color: var(--coral); }

/* Admin main content */
.admin-main { flex: 1; overflow-y: auto; background: var(--cream); }

.admin-section { display: none; padding: 2rem 2rem 4rem; max-width: 1100px; }
.admin-section.active { display: block; }

.admin-section-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.8rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border);
}
.admin-section-hdr h2 { font-size: 1.5rem; }

/* Admin cards */
.admin-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.2rem;
  box-shadow: var(--card-shadow);
}
.admin-card h3 { font-size: 1.05rem; margin-bottom: 1rem; color: var(--ink); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: 9px 18px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: .86rem;
  cursor: pointer;
  transition: all .2s;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--amber); color: var(--ink); }
.btn-primary:hover { background: var(--ink); color: var(--amber-light); }
.btn-success { background: var(--teal); color: white; }
.btn-success:hover { background: #1d5e59; }
.btn-danger  { background: var(--coral); color: white; }
.btn-danger:hover  { background: #c44020; }
.btn-ghost {
  background: none;
  border: 1.5px solid var(--border);
  color: var(--ink-60);
}
.btn-ghost:hover { border-color: var(--amber); color: var(--amber); }
.btn-sm { padding: 5px 12px; font-size: .78rem; }
.btn-xs { padding: 3px 8px; font-size: .72rem; }

/* Form fields */
.field { margin-bottom: 1rem; }
.field label {
  display: block;
  font-weight: 600;
  font-size: .82rem;
  color: var(--ink-60);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .4rem;
}
.field input, .field textarea, .field select {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  background: white;
  transition: border-color .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--amber); outline: none; }
.field textarea { min-height: 80px; resize: vertical; }
.two-field { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.three-field { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

/* Tab manager */
.tab-manager { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 2rem; align-items: flex-start; }
.tab-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: white;
  border: 2px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
}
.tab-pill.active { border-color: var(--amber); background: var(--amber-bg); color: var(--amber); }
.tab-pill .tp-icon { font-size: .85rem; }
.tab-pill .tp-name { min-width: 40px; }
.tab-pill .tp-del { color: var(--ink-30); font-size: .9rem; cursor: pointer; margin-left: 2px; }
.tab-pill .tp-del:hover { color: var(--coral); }
.tab-pill .tab-handle { cursor: grab; color: var(--ink-30); font-size: .8rem; }

.add-tab-btn {
  background: none;
  border: 2px dashed var(--border);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: .86rem;
  color: var(--ink-60);
  cursor: pointer;
  transition: all .2s;
}
.add-tab-btn:hover { border-color: var(--amber); color: var(--amber); }

/* Block editor */
.block-editor {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.block-editor-hdr {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: 10px 14px;
  background: var(--cream-dark);
  border-bottom: 1px solid var(--border);
  cursor: grab;
}
.block-editor-hdr:active { cursor: grabbing; }
.block-editor-hdr .be-handle { color: var(--ink-30); font-size: .9rem; }
.block-editor-hdr .be-type {
  font-size: .72rem;
  font-weight: 800;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: .1em;
}
.block-editor-hdr .be-title { flex: 1; font-size: .86rem; font-weight: 600; color: var(--ink); }
.block-editor-hdr .be-del { background: none; border: none; color: var(--ink-30); cursor: pointer; font-size: .9rem; transition: color .2s; }
.block-editor-hdr .be-del:hover { color: var(--coral); }

.block-editor-body { padding: 14px; }
.block-editor.dragging { opacity: .4; }
.block-editor.drag-over { border: 2px dashed var(--amber); }

/* Block picker */
.block-picker { margin-bottom: 1.5rem; }
.picker-group { margin-bottom: 1rem; }
.picker-group-label {
  font-size: .72rem;
  font-weight: 800;
  color: var(--ink-60);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: .5rem;
}
.picker-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.picker-btn {
  background: white;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 5px 12px;
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
  color: var(--ink);
}
.picker-btn:hover { border-color: var(--amber); background: var(--amber-bg); color: var(--amber); }

/* Admin list items */
.item-row { margin-bottom: .5rem; }
.add-btn {
  background: none;
  border: 1.5px dashed var(--border);
  border-radius: 8px;
  padding: 6px 14px;
  font-size: .82rem;
  color: var(--ink-60);
  cursor: pointer;
  margin-top: 6px;
  transition: all .2s;
}
.add-btn:hover { border-color: var(--amber); color: var(--amber); }
.del-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: .8rem;
  color: var(--ink-30);
  cursor: pointer;
  flex-shrink: 0;
  transition: all .2s;
}
.del-btn:hover { background: var(--coral-light); border-color: var(--coral); color: var(--coral); }
.del-btn.abs { position: absolute; top: 6px; right: 6px; }

.sec-label {
  display: block;
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--ink-60);
  margin: .75rem 0 .4rem;
}
.img-thumb { max-height: 80px; border-radius: 6px; object-fit: cover; }
.img-upload-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }

/* Student table */
.student-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.student-table th {
  background: var(--ink);
  color: var(--cream);
  padding: 9px 12px;
  text-align: left;
  font-size: .8rem;
  letter-spacing: .05em;
}
.student-table td { padding: 9px 12px; border-bottom: 1px solid var(--border); }
.student-table tr:hover td { background: var(--cream); }

/* Lesson index */
.lesson-index-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all .2s;
}
.lesson-index-item:hover { border-color: var(--amber); }
.lii-emoji { font-size: 1.4rem; }
.lii-info { flex: 1; }
.lii-title { font-weight: 700; font-size: .95rem; }
.lii-meta { font-size: .78rem; color: var(--ink-60); }
.lii-actions { display: flex; gap: 6px; }

/* Preview overlay */
.preview-overlay {
  position: fixed;
  inset: 0;
  background: var(--cream);
  z-index: 5000;
  overflow-y: auto;
  display: none;
}
.preview-overlay.open { display: block; }
.preview-close {
  position: fixed;
  top: 1rem; right: 1rem;
  z-index: 5001;
  background: var(--ink);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-weight: 700;
  font-size: .85rem;
  cursor: pointer;
  transition: all .2s;
}
.preview-close:hover { background: var(--amber); color: var(--ink); }

/* AI Generator modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  z-index: 4000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  display: none;
}
.modal-overlay.open { display: flex; }
.modal-box {
  background: white;
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 580px;
  width: 100%;
  box-shadow: var(--card-shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-box h3 { font-size: 1.3rem; margin-bottom: 1.5rem; }
.modal-actions { display: flex; gap: 10px; margin-top: 1.5rem; flex-wrap: wrap; }

/* Import JSON */
.json-drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
  cursor: pointer;
  transition: all .2s;
  background: var(--cream);
  margin-bottom: 1rem;
}
.json-drop-zone:hover, .json-drop-zone.drag-over { border-color: var(--amber); background: var(--amber-bg); }
.json-drop-zone p { color: var(--ink-60); font-size: .92rem; margin-top: .5rem; }

/* Progress table */
.progress-row { cursor: pointer; }
.progress-detail {
  display: none;
  background: var(--cream);
  padding: 12px;
  border-radius: 8px;
  margin-top: 4px;
  font-size: .85rem;
}
.progress-detail.open { display: block; }

/* Toast notification */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--ink);
  color: white;
  border-radius: var(--radius-sm);
  padding: 10px 18px;
  font-size: .86rem;
  font-weight: 600;
  z-index: 9990;
  box-shadow: var(--card-shadow-lg);
  animation: slideUp .3s ease;
  pointer-events: none;
}
.toast.success { background: var(--teal); }
.toast.error { background: var(--coral); }
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

/* Admin login screen */
.admin-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--ink) 0%, #2d1e14 100%);
  padding: 2rem;
}
.admin-login-box {
  background: white;
  border-radius: var(--radius);
  padding: 2.5rem;
  max-width: 420px;
  width: 100%;
  box-shadow: var(--card-shadow-lg);
}
.admin-login-box h1 { font-size: 1.5rem; margin-bottom: .5rem; }
.admin-login-box p { color: var(--ink-60); font-size: .9rem; margin-bottom: 2rem; }

/* Config section */
.config-info { background: var(--amber-bg); border: 1px solid var(--amber); border-radius: 8px; padding: 10px 14px; font-size: .86rem; margin-bottom: 1.2rem; }

/* Info button + popover */
.info-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--ink-30); color: white;
  border: none; cursor: pointer; font-size: .72rem; font-weight: 700;
  font-family: var(--font-sans); line-height: 1;
  transition: background .15s;
  flex-shrink: 0;
}
.info-btn:hover { background: var(--amber); }

.info-popover-wrap { position: relative; display: inline-block; }

.info-popover {
  display: none;
  position: absolute; left: 50%; top: calc(100% + 10px);
  transform: translateX(-50%);
  width: 300px;
  background: white; border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--card-shadow-lg);
  padding: 1rem 1.1rem;
  font-size: .84rem; line-height: 1.55;
  z-index: 900;
}
.info-popover::before {
  content: '';
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  border: 7px solid transparent;
  border-bottom-color: var(--border);
}
.info-popover::after {
  content: '';
  position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
  border: 6px solid transparent;
  border-bottom-color: white;
}
.info-popover.open { display: block; }
.info-popover ol { padding-left: 1.2rem; margin: .5rem 0 0; }
.info-popover li { margin-bottom: .35rem; }
.info-popover a { color: var(--amber); text-decoration: underline; word-break: break-all; }
.info-popover strong { color: var(--ink); }

/* ── RESPONSIVE ─────────────────────────────────────────────────── */
/* ── OFFLINE BANNER ─────────────────────────────────────────────── */
#offlineBanner {
  position: sticky;
  top: 0;
  z-index: 600;
  padding: 9px 16px;
  background: #c97c10;
  color: white;
  text-align: center;
  font-size: .84rem;
  font-weight: 600;
  letter-spacing: .01em;
}

/* ── RESPONSIVE ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .admin-layout { flex-direction: column; height: auto; overflow: visible; }
  .admin-sidebar { width: 100%; flex-direction: row; height: auto; overflow-x: auto; }
  .admin-main { overflow-y: visible; }
  .admin-section { padding: 1rem 1rem 3rem; }
  .two-field, .three-field { grid-template-columns: 1fr; }
  .wyr-wrap { grid-template-columns: 1fr; }
  .wyr-vs { display: none; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
  .tab-panel { padding: 24px 16px 80px; }
  .flashcard-scene { height: 240px; }
  .cta-block { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .vocab-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .fc-rating { flex-direction: column; }
  .fc-rating button { width: 100%; }
}