/* ─── Reset & base ─────────────────────────────────────────────────────────── */

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

:root {
  --bg: #121212;
  --bg-card: #1e1e1e;
  --bg-card-hover: #252525;
  --bg-input: #2a2a2a;
  --border: #333;
  --text: #e0e0e0;
  --text-muted: #888;
  --accent: #e74c3c;
  --accent-hover: #c0392b;
  --accent-secondary: #3498db;
  --success: #27ae60;
  --danger: #c0392b;
  --tag-bg: #2c3e50;
  --tag-text: #7fb3d3;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  --transition: 0.2s ease;
  font-size: 16px;
}

html, body {
  height: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue',
    'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── App layout ───────────────────────────────────────────────────────────── */

.app {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 16px 64px;
}

/* ─── Header ───────────────────────────────────────────────────────────────── */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.app-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: 'SFMono-Regular', Consolas, monospace;
}

.btn-lang {
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.btn-lang:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

/* ─── Record section ───────────────────────────────────────────────────────── */

.record-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 32px 0;
}

.record-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  background: var(--bg-card);
  color: var(--accent);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.4);
}

.record-btn:hover {
  background: rgba(231, 76, 60, 0.1);
  transform: scale(1.04);
}

.record-btn.recording {
  background: var(--accent);
  color: #fff;
  animation: pulse-ring 1.5s infinite;
}

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.5); }
  70% { box-shadow: 0 0 0 18px rgba(231, 76, 60, 0); }
  100% { box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); }
}

.record-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: currentColor;
  transition: border-radius var(--transition);
}

.record-btn.recording .record-icon {
  border-radius: var(--radius-sm);
}

.record-btn-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-align: center;
}

/* Recording indicator */

.recording-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 600;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* Timer */

.timer-display {
  font-size: 2rem;
  font-variant-numeric: tabular-nums;
  font-family: 'SFMono-Regular', Consolas, monospace;
  color: var(--accent);
  letter-spacing: 0.05em;
}

/* Live waveform canvas */

.live-waveform {
  width: 100%;
  max-width: 600px;
  height: 80px;
  border-radius: var(--radius);
  background: var(--bg-card);
  display: block;
}

/* ─── Storage display ──────────────────────────────────────────────────────── */

.storage-display {
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

/* ─── Memo list ────────────────────────────────────────────────────────────── */

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 48px 16px;
  font-size: 0.95rem;
}

.memo-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ─── Memo item card ───────────────────────────────────────────────────────── */

.memo-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: border-color var(--transition);
}

.memo-item:hover {
  border-color: #444;
}

/* Header row */

.memo-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.memo-label {
  flex: 1;
  min-width: 160px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 10px;
  transition: border-color var(--transition);
}

.memo-label:focus {
  outline: none;
  border-color: var(--accent-secondary);
}

.memo-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.memo-duration {
  font-variant-numeric: tabular-nums;
  font-family: 'SFMono-Regular', Consolas, monospace;
  color: var(--accent);
  font-weight: 600;
}

/* Tags */

.memo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 12px;
  padding: 2px 10px 2px 10px;
  font-size: 0.75rem;
}

.tag-remove {
  background: none;
  border: none;
  color: var(--tag-text);
  cursor: pointer;
  font-size: 0.85rem;
  line-height: 1;
  padding: 0;
  opacity: 0.6;
}

.tag-remove:hover {
  opacity: 1;
}

.btn-tag-add {
  background: none;
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  padding: 2px 10px;
  transition: color var(--transition), border-color var(--transition);
}

.btn-tag-add:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.tag-input {
  background: var(--bg-input);
  border: 1px solid var(--accent-secondary);
  border-radius: 12px;
  color: var(--text);
  font-size: 0.75rem;
  padding: 2px 10px;
  width: 100px;
}

.tag-input:focus {
  outline: none;
}

/* Waveform thumbnail */

.memo-waveform {
  width: 100%;
  max-width: 100%;
  height: 48px;
  border-radius: var(--radius-sm);
  background: #1a1a1a;
  display: block;
}

/* Playback row */

.memo-playback {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-icon {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text);
  font-size: 0.8rem;
  flex-shrink: 0;
  transition: background var(--transition);
}

.btn-icon:hover {
  background: var(--border);
}

.memo-scrubber {
  flex: 1;
  height: 4px;
  accent-color: var(--accent);
  cursor: pointer;
}

.playback-time {
  font-size: 0.75rem;
  font-variant-numeric: tabular-nums;
  font-family: 'SFMono-Regular', Consolas, monospace;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 80px;
}

/* Transcription */

.memo-transcription {
  background: #1a1a1a;
  border-left: 3px solid var(--accent-secondary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 8px 12px;
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.5;
  white-space: pre-wrap;
}

/* Action buttons */

.memo-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-sm {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.78rem;
  padding: 5px 12px;
  transition: color var(--transition), border-color var(--transition);
}

.btn-sm:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.btn-sm:disabled {
  opacity: 0.5;
  cursor: default;
}

.btn-danger {
  color: var(--danger);
  border-color: rgba(192, 57, 43, 0.4);
}

.btn-danger:hover {
  background: rgba(192, 57, 43, 0.15);
  border-color: var(--danger);
  color: #e74c3c;
}

/* ─── Toast notifications ──────────────────────────────────────────────────── */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 20px;
  font-size: 0.85rem;
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 1000;
  pointer-events: none;
  white-space: nowrap;
}

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

.toast.toast-success {
  border-color: var(--success);
}

.toast.toast-error {
  border-color: var(--danger);
  color: #e74c3c;
}

/* ─── Scrollbar ────────────────────────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 3px;
}

/* ─── Range input ──────────────────────────────────────────────────────────── */

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

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

/* ─── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 480px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .memo-header {
    flex-direction: column;
  }

  .record-btn {
    width: 100px;
    height: 100px;
  }

  .timer-display {
    font-size: 1.5rem;
  }
}