/* ─── Fiszki — Appwrite-inspired theme ───────────────────────────────── */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #0f0f23;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --accent-pink: #f02e65;
  --accent-purple: #7c3aed;
  --accent-gradient: linear-gradient(135deg, #f02e65, #7c3aed);
  --accent-glow: rgba(240, 46, 101, 0.25);
  --text-primary: #e4e4e7;
  --text-secondary: #a1a1aa;
  --text-muted: #52525b;
  --text-accent: #f02e65;
  --success: #22c55e;
  --error: #ef4444;
  --warning: #eab308;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px;
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(124, 58, 237, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(240, 46, 101, 0.05) 0%, transparent 50%);
}

/* ─── Headers ─── */
.app-header {
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}

.app-header .logo {
  font-size: 2rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.app-header .sub {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

/* ─── Section containers ─── */
.section {
  width: 100%;
  max-width: 520px;
  margin-bottom: 32px;
}

.section-title {
  font-size: 0.7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::before {
  content: '';
  width: 3px;
  height: 14px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

/* ─── Appwrite-style cards ─── */
.card-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-primary);
  margin-bottom: 10px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.card-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.card-link:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.card-link:hover::before {
  opacity: 1;
}

.card-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

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

.card-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.card-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-count {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-accent);
  background: rgba(240, 46, 101, 0.08);
  border: 1px solid rgba(240, 46, 101, 0.15);
  border-radius: 20px;
  padding: 4px 12px;
  flex-shrink: 0;
}

/* ─── Episode page ─── */
.ep-header {
  text-align: center;
  margin-bottom: 24px;
}

.ep-header h1 {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 3px;
}

.ep-header .ep-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 1px;
}

.selects-row {
  display: flex;
  gap: 10px;
  width: 100%;
  max-width: 540px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.selects-row select {
  flex: 1;
  min-width: 140px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color 0.2s;
  font-family: var(--font);
}

.selects-row select:focus {
  outline: none;
  border-color: var(--accent-pink);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.rate-row {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  max-width: 540px;
  margin-bottom: 10px;
}

.rate-row .rate-lbl-head {
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.rate-row input[type=range] {
  flex: 1;
  max-width: 120px;
  accent-color: var(--accent-pink);
  cursor: pointer;
}

.rate-row .rate-lbl {
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 34px;
}

.voice-sel {
  flex: 1;
  min-width: 140px;
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  font-size: 0.76rem;
  cursor: pointer;
  font-family: var(--font);
}

.voice-sel:focus {
  outline: none;
  border-color: var(--accent-pink);
}

/* ─── Progress ─── */
.progress-wrap {
  width: 100%;
  max-width: 540px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.progress-bar-bg {
  flex: 1;
  height: 4px;
  background: var(--bg-glass);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-gradient);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.progress-text {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ─── Card ─── */
.card-container {
  perspective: 1200px;
  width: 100%;
  max-width: 540px;
  height: 250px;
  cursor: pointer;
  margin-bottom: 20px;
}

.card {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.card.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 32px;
  text-align: center;
}

.card-front {
  background: linear-gradient(145deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}

.card-back {
  background: linear-gradient(145deg, rgba(124, 58, 237, 0.2) 0%, rgba(240, 46, 101, 0.14) 100%);
  border: 1px solid rgba(124, 58, 237, 0.4);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 40px rgba(124, 58, 237, 0.08);
  transform: rotateY(180deg);
  backdrop-filter: blur(12px);
}

.card-label {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 700;
}

.card-back .card-label {
  color: rgba(240, 46, 101, 0.85);
  font-size: 0.7rem;
}

.card-cat {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  letter-spacing: 1px;
  opacity: 0.5;
}

.card-text {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
}

.card-back .card-text {
  background: linear-gradient(135deg, #f02e65, #a855f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.15rem;
  text-shadow: 0 0 40px rgba(240, 46, 101, 0.15);
}

.card-hint {
  margin-top: 16px;
  font-size: 0.68rem;
  color: var(--text-muted);
  opacity: 0.4;
}

/* ─── Text Size ─── */
.card-text.size-2 { font-size: 1.85rem !important; }
.card-text.size-3 { font-size: 2.6rem !important; line-height: 1.3; }
.card-text.size-4 { font-size: 3.4rem !important; line-height: 1.2; }

.btn-size {
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 10px;
  font-family: var(--font);
  transition: all 0.15s;
}
.btn-size:hover { color: var(--text-primary); border-color: var(--border-hover); }
.btn-size.active { background: var(--accent-pink); color: #fff; border-color: var(--accent-pink); }

/* ─── Voice source toggle ─── */
.src-toggle {
  display: flex;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  font-size: 10px;
}
.src-toggle button {
  padding: 3px 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: 10px;
  transition: all 0.15s;
}
.src-toggle button.active {
  background: rgba(124,58,237,0.2);
  color: #a78bfa;
}
.src-toggle button:first-child { border-right: 1px solid var(--border-subtle); }

.word-hot {
  cursor: pointer;
  border-bottom: 1px dashed rgba(240, 46, 101, 0.3);
  transition: color 0.15s, border-color 0.15s;
}

.word-hot:hover {
  color: rgba(240, 46, 101, 0.8);
  border-bottom-color: var(--accent-pink);
}

#wordTip {
  position: fixed;
  z-index: 300;
  background: var(--bg-secondary);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  font-size: 0.88rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s;
  max-width: 220px;
  text-align: center;
  box-shadow: var(--shadow-card);
}

#wordTip .wt-en {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

#wordTip .wt-pl {
  font-size: 0.82rem;
  color: var(--text-accent);
}

#wordTip.show {
  opacity: 1;
}

/* ─── Buttons ─── */
.controls {
  display: flex;
  gap: 10px;
  max-width: 540px;
  width: 100%;
  margin-bottom: 16px;
}

.btn {
  flex: 1;
  padding: 12px 14px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
  font-family: var(--font);
}

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

.btn-wrong {
  background: rgba(239, 68, 68, 0.08);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-wrong:hover {
  background: rgba(239, 68, 68, 0.14);
}

.btn-flip {
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  flex: 1.3;
}

.btn-flip:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-correct {
  background: rgba(34, 197, 94, 0.08);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.btn-correct:hover {
  background: rgba(34, 197, 94, 0.14);
}

/* ─── TTS ─── */
.tts-row {
  display: flex;
  justify-content: center;
  width: 100%;
  max-width: 540px;
  margin-bottom: 8px;
}

.btn-speak {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 20px;
  border-radius: 20px;
  background: var(--bg-glass);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font);
}

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

.btn-speak.speaking {
  color: var(--text-accent);
  border-color: rgba(240, 46, 101, 0.3);
  animation: pulse 0.8s infinite;
}

/* ─── Voice UI ─── */
.voice-ui {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 540px;
  margin-bottom: 16px;
  padding: 16px 20px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
}

.voice-status {
  display: flex;
  align-items: center;
  gap: 12px;
}

.vs-icon {
  font-size: 1.5rem;
  min-width: 2rem;
  text-align: center;
}

.vs-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.vs-text.listening {
  color: var(--warning);
  animation: pulse 0.7s infinite;
}

.vs-text.correct {
  color: var(--success);
}

.vs-text.wrong {
  color: var(--error);
}

.voice-result {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  min-height: 22px;
  line-height: 1.5;
}

.btn-pause {
  padding: 6px 18px;
  border-radius: 20px;
  background: var(--bg-glass);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.18s;
  font-family: var(--font);
}

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

/* ─── Stats ─── */
.stats {
  display: flex;
  gap: 32px;
  margin-bottom: 14px;
}

.stat {
  text-align: center;
}

.stat-val {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.stat-lbl {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-correct .stat-val {
  color: var(--success);
}

.stat-wrong .stat-val {
  color: var(--error);
}

.stat-pct .stat-val {
  color: #fbbf24;
}

/* ─── Keyboard hints ─── */
.kbd-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  opacity: 0.3;
  text-align: center;
  margin-bottom: 8px;
}

kbd {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.68rem;
  color: var(--text-secondary);
  font-family: var(--font);
}

/* ─── Finished screen ─── */
.finished {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 440px;
  gap: 20px;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.finished-title {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.finished-score {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.btn-restart {
  padding: 12px 32px;
  background: var(--accent-gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s;
  font-family: var(--font);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-restart:hover {
  opacity: 0.88;
}

/* ─── Animations ─── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.3s ease;
}

/* ─── Fixed buttons ─── */
.lang-toggle {
  position: fixed;
  top: 12px;
  right: 44px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 5px 10px;
  font-size: 1rem;
  cursor: pointer;
  z-index: 100;
  transition: all 0.2s;
}
.lang-toggle:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.theme-toggle {
  position: fixed;
  top: 12px;
  right: 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 1rem;
  cursor: pointer;
  z-index: 100;
  transition: all 0.2s;
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.btn-reset-fixed {
  position: fixed;
  top: 12px;
  left: 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 0.8rem;
  cursor: pointer;
  z-index: 100;
  color: var(--text-secondary);
  font-weight: 600;
  transition: all 0.2s;
}

.btn-reset-fixed:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* ─── Home button (generator, etc.) ─── */
.home-toggle {
  position: fixed;
  top: 12px;
  left: 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 5px 14px;
  font-size: 0.82rem;
  cursor: pointer;
  z-index: 100;
  color: var(--text-secondary);
  font-weight: 600;
  transition: all 0.2s;
  font-family: var(--font);
  display: flex;
  align-items: center;
  gap: 4px;
}
.home-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* ─── Extra layout classes ─── */
.subtitle {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  text-align: center;
}

.ep-count {
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0.5;
  margin-bottom: 18px;
  text-align: center;
}

/* ─── Category & mode buttons ─── */
.cats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-width: 580px;
  width: 100%;
  justify-content: center;
  margin-bottom: 16px;
}

.cat-btn {
  padding: 5px 13px;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  cursor: pointer;
  background: var(--bg-glass);
  color: var(--text-muted);
  transition: all 0.2s;
  font-family: var(--font);
}

.cat-btn.active {
  background: rgba(240, 46, 101, 0.1);
  color: var(--text-accent);
  border-color: rgba(240, 46, 101, 0.3);
}

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

.mode-toggle {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.btn-mode {
  padding: 6px 16px;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  cursor: pointer;
  background: var(--bg-glass);
  color: var(--text-muted);
  transition: all 0.2s;
  font-family: var(--font);
}

.btn-mode.active {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
  border-color: rgba(34, 197, 94, 0.3);
}

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

/* ─── Part navigation ─── */
.part-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.part-link {
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-glass);
  cursor: default;
}

.part-link.current {
  border-color: rgba(240, 46, 101, 0.3);
  color: var(--text-accent);
  background: rgba(240, 46, 101, 0.08);
}

/* ─── Card category alias ─── */
.card-category {
  font-size: 0.65rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  letter-spacing: 1px;
  opacity: 0.5;
}