/* Vocab app — scoped to [data-app="vocab"] */

/* --- Brand trong vocab (logo to hơn, có border-bottom) --- */
[data-app="vocab"] .brand {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--accent-light);
}
[data-app="vocab"] .logo {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: 12px;
  font-size: 30px;
  color: #fff;
  box-shadow: var(--shadow);
}
[data-app="vocab"] .brand h1 { font-size: 20px; margin: 0; font-weight: 700; }
[data-app="vocab"] .tagline { font-size: 12px; color: var(--text-soft); margin: 0; opacity: 1; }

[data-app="vocab"] .hero { text-align: center; margin: 8px 0 22px; }
[data-app="vocab"] .hero .hint { color: var(--text); font-size: 14px; line-height: 1.6; }
[data-app="vocab"] .hero strong { color: var(--accent); }

/* --- Home: big CTA + mini stats --- */
[data-app="vocab"] .big-cta { display: flex; justify-content: center; margin: 16px 0 24px; }
[data-app="vocab"] .btn.btn-cram {
  background: linear-gradient(135deg, var(--cram-orange) 0%, var(--accent) 100%);
  color: #fff; border: 0;
  flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  padding: 22px 36px;
  box-shadow: 0 6px 18px rgba(255, 107, 53, .35);
  min-width: 320px;
  max-width: 100%;
  text-align: center;
}
[data-app="vocab"] .btn.btn-cram:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255, 107, 53, .5); }
[data-app="vocab"] .btn.btn-cram strong { font-size: 22px; font-weight: 700; letter-spacing: 0.5px; }
[data-app="vocab"] .btn.btn-cram small { font-size: 13px; opacity: .9; font-weight: 400; display: block; }
[data-app="vocab"] .btn.btn-cram .cta-stack { display: flex; flex-direction: column; align-items: center; gap: 4px; }
[data-app="vocab"] .btn-icon { font-size: 32px; }

[data-app="vocab"] .mini-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
[data-app="vocab"] .mini-stats > div {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 8px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
}
[data-app="vocab"] .mini-stats span { font-size: 24px; font-weight: 700; color: var(--accent); line-height: 1.1; }
[data-app="vocab"] .mini-stats small { font-size: 11px; color: var(--text-soft); margin-top: 4px; }

/* --- Study bar + progress --- */
[data-app="vocab"] .study-bar {
  display: flex; align-items: center; gap: 12px;
}
[data-app="vocab"] .progress-wrap { flex: 1; display: flex; align-items: center; gap: 8px; }
[data-app="vocab"] .progress-bar { flex: 1; height: 6px; background: #e6e0dd; border-radius: 999px; overflow: hidden; }
[data-app="vocab"] .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cram-orange) 0%, var(--accent) 100%);
  width: 0%; transition: width .25s;
}
[data-app="vocab"] .progress-text { font-size: 12px; color: var(--text-soft); min-width: 60px; text-align: right; }
[data-app="vocab"] .study-mode {
  font-size: 11px; font-weight: 600; color: var(--cram-orange);
  padding: 4px 10px; background: #fff3ed;
  border: 1px solid #ffd4be; border-radius: 999px;
  letter-spacing: 1px;
}

[data-app="vocab"] .btn { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--border); border-radius: var(--radius); font-size: 14px; font-weight: 500; background: #fff; color: var(--text); padding: 10px 16px; transition: all .12s; }
[data-app="vocab"] .btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
[data-app="vocab"] .btn:active { transform: none; }
[data-app="vocab"] .btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
[data-app="vocab"] .btn-primary:hover { background: var(--accent-dark); }
[data-app="vocab"] .btn-ghost { background: transparent; border-color: transparent; color: var(--text-soft); }
[data-app="vocab"] .btn-ghost:hover { background: var(--card-bg); }
[data-app="vocab"] .btn-secondary { background: #fff; color: var(--accent); border-color: var(--accent-light); }
[data-app="vocab"] .btn-xl { padding: 14px 22px; font-size: 16px; }

/* --- Card flip --- */
[data-app="vocab"] .card-stage {
  perspective: 1200px;
  -webkit-perspective: 1200px;
  margin: 24px auto;
  max-width: 480px;
}
[data-app="vocab"] .flip-card {
  position: relative; width: 100%; min-height: 360px;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: transform .55s cubic-bezier(.4,.2,.2,1);
  cursor: pointer;
}
[data-app="vocab"] .flip-card.no-transition { transition: none; }
[data-app="vocab"] .flip-card.flipped { transform: rotateY(180deg); }
[data-app="vocab"] .flip-face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 32px 24px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
}
/* Khi CHƯA lật: mặt trước nằm trên, mặt sau bị che bởi backface-visibility */
[data-app="vocab"] .flip-card:not(.flipped) .flip-front { z-index: 2; }
[data-app="vocab"] .flip-card:not(.flipped) .flip-back  { z-index: 1; }
/* Khi ĐÃ lật: đảo z-index để mặt sau nằm trên (vì nó giờ quay mặt về user) */
[data-app="vocab"] .flip-card.flipped .flip-front { z-index: 1; }
[data-app="vocab"] .flip-card.flipped .flip-back  { z-index: 2; }

[data-app="vocab"] .flip-front { transform: rotateY(0deg) translateZ(1px); }
[data-app="vocab"] .flip-back {
  transform: rotateY(180deg) translateZ(1px);
  background: linear-gradient(180deg, #fff 0%, #fff8f4 100%);
}
[data-app="vocab"] .flip-label {
  position: absolute; top: 14px; left: 50%; transform: translateX(-50%);
  font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase;
  padding: 3px 10px;
  background: var(--accent-light); color: var(--accent);
  border-radius: 999px;
}
[data-app="vocab"] .hanzi-xl { font-size: 96px; font-weight: 600; line-height: 1; color: #1a1a1a; font-family: "PingFang SC", "Microsoft YaHei", "STHeiti", serif; margin: 12px 0; }
[data-app="vocab"] .pinyin-lg { font-size: 28px; color: var(--accent); font-weight: 500; margin: 6px 0; font-style: italic; }
[data-app="vocab"] .meaning-lg { font-size: 20px; color: var(--text); margin: 8px 0; }
[data-app="vocab"] .pos { font-size: 13px; color: var(--text-soft); margin-top: 4px; }

/* --- Study controls --- */
[data-app="vocab"] .study-controls { display: flex; flex-direction: column; align-items: center; gap: 12px; margin-top: 16px; }
[data-app="vocab"] .rating-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  width: 100%;
  max-width: 480px;
}
[data-app="vocab"] .btn-rate {
  flex-direction: column; align-items: stretch; padding: 12px 8px; text-align: center;
  border: 1px solid var(--border); background: #fff; gap: 4px; position: relative;
}
[data-app="vocab"] .btn-rate .rate-label { font-size: 14px; font-weight: 600; }
[data-app="vocab"] .btn-rate .rate-interval { font-size: 11px; color: var(--text-soft); font-weight: 400; }
[data-app="vocab"] .btn-rate kbd { position: absolute; top: 6px; right: 6px; }
[data-app="vocab"] .btn-again { color: var(--error); border-color: var(--error-bg); background: var(--error-bg); }
[data-app="vocab"] .btn-again:hover { background: #fbd0d6; }
[data-app="vocab"] .btn-hard { color: var(--warning); border-color: var(--warning-bg); background: var(--warning-bg); }
[data-app="vocab"] .btn-hard:hover { background: #fbe8b8; }
[data-app="vocab"] .btn-good { color: var(--info); border-color: var(--info-bg); background: var(--info-bg); }
[data-app="vocab"] .btn-good:hover { background: #c8e3f0; }

/* --- Done view --- */
[data-app="vocab"] .done-card {
  text-align: center;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 20px;
  margin-top: 40px;
  box-shadow: var(--shadow);
}
[data-app="vocab"] .done-emoji { font-size: 56px; margin-bottom: 8px; }
[data-app="vocab"] .done-card h2 { font-size: 22px; }
[data-app="vocab"] .done-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 12px; margin: 22px 0;
}
[data-app="vocab"] .done-stats > div { display: flex; flex-direction: column; font-size: 26px; font-weight: 700; color: var(--accent); }
[data-app="vocab"] .done-stats small { font-size: 11px; color: var(--text-soft); font-weight: 400; }
[data-app="vocab"] .done-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }