:root {
  --bg: #F7F3EC;
  --bg-elevated: #ECDFCC;
  --bg-card-hover: #E2D9C8;
  --border: #CFC7B8;
  --border-subtle: #E8E2D6;
  --text: #181C14;
  --text-secondary: #3C3D37;
  --text-muted: #697565;
  --primary: #697565;
  --primary-soft: rgba(105, 117, 101, 0.12);
  --primary-hover: #4E574B;
  --success: #5A7D50;
  --success-soft: rgba(90, 125, 80, 0.12);
  --warning: #A67C3D;
  --warning-soft: rgba(166, 124, 61, 0.12);
  --danger: #9E4A4A;
  --danger-soft: rgba(158, 74, 74, 0.12);
  --shadow-sm: 0 1px 2px 0 rgba(24, 28, 20, 0.04);
  --shadow: 0 1px 3px 0 rgba(24, 28, 20, 0.06), 0 1px 2px -1px rgba(24, 28, 20, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(24, 28, 20, 0.06), 0 2px 4px -2px rgba(24, 28, 20, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(24, 28, 20, 0.06), 0 4px 6px -4px rgba(24, 28, 20, 0.06);
  --shadow-xl: 0 20px 25px -5px rgba(24, 28, 20, 0.06), 0 8px 10px -6px rgba(24, 28, 20, 0.06);
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

[data-theme="dark"] {
  --bg: #181C14;
  --bg-elevated: #242820;
  --bg-card-hover: #2E3328;
  --border: #3C3D37;
  --border-subtle: #22261C;
  --text: #ECDFCC;
  --text-secondary: #C8C2B4;
  --text-muted: #697565;
  --primary: #ECDFCC;
  --primary-soft: rgba(236, 223, 204, 0.08);
  --primary-hover: #F5F0E8;
  --success: #7FAE75;
  --success-soft: rgba(127, 174, 117, 0.08);
  --warning: #C9A05C;
  --warning-soft: rgba(201, 160, 92, 0.08);
  --danger: #C46E6E;
  --danger-soft: rgba(196, 110, 110, 0.08);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
}

/* ===== Header ===== */
.app-header {
  background: rgba(247, 243, 236, 0.85);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  height: 64px;
  transition: background 0.3s, border-color 0.3s;
}

[data-theme="dark"] .app-header {
  background: rgba(24, 28, 20, 0.85);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.brand-icon svg { width: 20px; height: 20px; }

.brand-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ===== Nav ===== */
.nav-tabs {
  display: flex;
  gap: 4px;
  background: var(--border-subtle);
  padding: 4px;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  max-width: calc(100vw - 120px);
}

.nav-tabs::-webkit-scrollbar { display: none; }

.nav-tabs button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 7px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-tabs button:hover {
  color: var(--text-secondary);
  background: rgba(236, 223, 204, 0.3);
}

[data-theme="dark"] .nav-tabs button:hover {
  background: rgba(236, 223, 204, 0.06);
}

.nav-tabs button.active {
  background: var(--bg-elevated);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* ===== Theme Toggle ===== */
.theme-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.theme-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.theme-btn svg {
  width: 18px;
  height: 18px;
  position: absolute;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s;
}

.theme-btn .moon { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-btn .sun { opacity: 0; transform: rotate(90deg) scale(0.5); }

[data-theme="dark"] .theme-btn .moon { opacity: 0; transform: rotate(-90deg) scale(0.5); }
[data-theme="dark"] .theme-btn .sun { opacity: 1; transform: rotate(0deg) scale(1); }

/* ===== Main ===== */
main {
  max-width: 840px;
  margin: 0 auto;
  padding: 32px 20px 60px;
  animation: fadeUp 0.4s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Cards ===== */
.card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

.card + .card { margin-top: 20px; }

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}

.card-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Prevent inline SVGs from stretching in flex containers */
svg[viewBox] {
  flex-shrink: 0;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
}

.btn-icon svg {
  width: 18px;
  height: 18px;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: var(--bg-elevated);
  box-shadow: 0 4px 14px -2px rgba(105, 117, 101, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px -2px rgba(105, 117, 101, 0.45);
  transform: translateY(-1px);
}

[data-theme="dark"] .btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  box-shadow: 0 4px 14px -2px rgba(236, 223, 204, 0.15);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--text-muted);
  color: var(--text);
}

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.btn-danger:hover {
  background: var(--danger);
  color: var(--bg-elevated);
}

.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: var(--radius-sm); }

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Form ===== */
.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.form-group textarea { min-height: 160px; line-height: 1.7; }

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

/* ===== Readonly textarea ===== */
textarea[readonly] {
  background: var(--bg);
  cursor: text;
  color: var(--text-secondary);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-muted);
}

.empty-state-icon {
  width: 72px;
  height: 72px;
  background: var(--primary-soft);
  border-radius: var(--radius-xl);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.empty-state-icon svg {
  width: 32px;
  height: 32px;
}

.empty-state h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 15px;
  max-width: 400px;
  margin: 0 auto 20px;
  line-height: 1.7;
}

/* ===== Session List ===== */
.session-list { display: grid; gap: 12px; }

.session-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  transition: all var(--transition);
  cursor: default;
}

.session-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.session-info { flex: 1; min-width: 0; }

.session-title {
  font-weight: 700;
  color: var(--text);
  font-size: 15px;
  letter-spacing: -0.2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-meta {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.session-actions { display: flex; gap: 8px; flex-shrink: 0; margin-left: 12px; }

/* ===== Practice Page ===== */
.practice-card {
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.practice-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.practice-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.2px;
}

.practice-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Progress bar */
.progress-track {
  width: 100%;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 12px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary-hover));
  border-radius: 3px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Player Bar */
.player-bar {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-elevated), var(--bg));
}

.player-btn {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  color: var(--bg-elevated);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px -2px rgba(105, 117, 101, 0.35);
  transition: all var(--transition);
  flex-shrink: 0;
}

.player-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 20px -2px rgba(105, 117, 101, 0.45);
}

[data-theme="dark"] .player-btn {
  box-shadow: 0 4px 14px -2px rgba(236, 223, 204, 0.15);
}

.player-btn:active { transform: scale(0.95); }

.player-btn svg { width: 22px; height: 22px; fill: currentColor; }

.player-btn .pause-icon { display: none; }
.player-btn.playing .play-icon { display: none; }
.player-btn.playing .pause-icon { display: block; }

.speed-control {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.speed-control label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.speed-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  min-width: 32px;
  text-align: center;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(105, 117, 101, 0.4);
  border: 2px solid var(--bg-elevated);
  transition: transform var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }

/* Dictation Area */
.dictation-area {
  padding: 32px 24px;
  min-height: 120px;
}

.dictation-full {
  width: 100%;
  padding: 16px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 16px;
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}

.dictation-full:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.dictation-full::placeholder { color: var(--text-muted); }

/* Words Line */
.words-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1.5px solid var(--border);
  min-height: 80px;
}

.word-lock {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  background: var(--success-soft);
  border: 1.5px solid rgba(90, 125, 80, 0.3);
  color: var(--success);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

[data-theme="dark"] .word-lock {
  border-color: rgba(127, 174, 117, 0.2);
}

.word-gap {
  min-width: 56px;
  padding: 8px 12px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  text-align: center;
  background: var(--bg-elevated);
  color: var(--text);
  font-family: inherit;
  font-weight: 500;
  transition: all var(--transition);
}

.word-gap:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.word-gap::placeholder { color: var(--text-muted); opacity: 0.6; }

/* Action Bar */
.action-bar {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  background: var(--bg-elevated);
}

/* Side Panel */
.side-panel {
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.accordion {
  border-bottom: 1px solid var(--border);
}

.accordion:last-child { border-bottom: none; }

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: transparent;
  border: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}

.accordion-header:hover {
  color: var(--text);
  background: rgba(105, 117, 101, 0.03);
}

.accordion-header::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform var(--transition);
}

.accordion-header.expanded::after { transform: rotate(-135deg); }

.accordion-body {
  padding: 0 24px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: block;
}

.accordion-body.hidden { display: none; }

.original-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.translation-text {
  color: var(--success);
  background: var(--success-soft);
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  line-height: 1.7;
  font-weight: 500;
}

/* Word Chips */
.word-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0;
}

.word-chip {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1.5px solid var(--border);
  font-size: 14px;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition);
}

.word-chip:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-1px);
}

#word-trans {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* Result Page */
.result-card {
  text-align: center;
  padding: 56px 32px;
}

.result-card h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

.result-card p {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 28px;
}

.result-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 32px;
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
  font-weight: 500;
}

/* Level badges */
.level-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: var(--bg-card-hover);
  color: var(--text-secondary);
}

.level-a1 { background: #D8E6D4; color: #3C5A35; }
.level-a2 { background: #C8DCC2; color: #2D4A28; }
.level-b1 { background: #D4C8A8; color: #5A4A20; }
.level-b2 { background: #C4B898; color: #4A3A18; }
.level-c1 { background: #C8B8A8; color: #4A3A2A; }
.level-c2 { background: #B8A898; color: #3A2E20; }

[data-theme="dark"] .level-a1 { background: #2A3A24; color: #A8C8A0; }
[data-theme="dark"] .level-a2 { background: #243A20; color: #98C090; }
[data-theme="dark"] .level-b1 { background: #3A3020; color: #C8B880; }
[data-theme="dark"] .level-b2 { background: #322A18; color: #B8A870; }
[data-theme="dark"] .level-c1 { background: #3A2E24; color: #C8B0A0; }
[data-theme="dark"] .level-c2 { background: #322820; color: #B8A090; }

/* Filter tabs */
.level-filter {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.level-filter button {
  transition: all var(--transition);
}

/* Toast */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-elevated);
  color: var(--text);
  padding: 12px 22px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 100;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(12px);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Keyboard hint */
.keyboard-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
}

.keyboard-hint kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-size: 11px;
  font-family: inherit;
  color: var(--text-secondary);
  box-shadow: 0 1px 0 var(--border);
}

/* Voice Toggle */
.voice-toggle {
  display: flex;
  gap: 4px;
  align-items: center;
}

.voice-toggle .voice-chip {
  padding: 6px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: 1.5px solid var(--border);
  cursor: pointer;
  transition: all var(--transition);
}

.voice-toggle .voice-chip:hover {
  border-color: var(--primary);
  color: var(--text-secondary);
}

.voice-toggle .voice-chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--bg-elevated);
}

/* Drill wrong word highlight */
.drill-wrong {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  background: var(--danger-soft);
  border: 1.5px solid rgba(158, 74, 74, 0.3);
  color: var(--danger);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
}

[data-theme="dark"] .drill-wrong {
  border-color: rgba(196, 110, 110, 0.2);
}

/* Animations */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: slideIn 0.3s ease forwards;
}

/* Responsive */
@media (max-width: 640px) {
  .app-header { padding: 0 16px; height: 56px; }
  .brand-text { display: none; }
  .nav-tabs button { padding: 6px 12px; font-size: 13px; }
  main { padding: 20px 16px 40px; }
  .card { padding: 20px; }
  .session-item { flex-direction: column; align-items: flex-start; gap: 12px; }
  .session-actions { margin-left: 0; width: 100%; }
  .session-actions .btn { flex: 1; }
  .practice-header { flex-direction: column; align-items: flex-start; }
  .result-stats { gap: 20px; }
  .stat-value { font-size: 28px; }
}