/* ===== CSS Variables ===== */
:root {
  --primary: #6366F1;
  --primary-light: #8B5CF6;
  --primary-glow: rgba(99, 102, 241, 0.4);
  --primary-glow-strong: rgba(99, 102, 241, 0.6);
  --bg-dark: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-elevated: #242442;
  --bg-input: #16162b;
  --text-primary: #f0f0f5;
  --text-secondary: #9898b0;
  --text-muted: #5a5a7a;
  --border: #2a2a45;
  --danger: #ef4444;
  --success: #22c55e;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.2s ease;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.hidden { display: none !important; }

/* ===== App Container ===== */
#app {
  height: 100%;
  display: flex;
  flex-direction: column;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}

/* ===== Header ===== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  flex-shrink: 0;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo-icon {
  color: var(--primary);
  font-size: 22px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.language-select {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}

.language-select:focus {
  border-color: var(--primary);
}

/* ===== Main ===== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  gap: 24px;
  overflow-y: auto;
  min-height: 0;
}

/* ===== Status Text ===== */
.status-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  transition: all var(--transition);
  min-height: 24px;
}

.status-text.recording {
  color: var(--danger);
}

.status-text.processing {
  color: var(--primary-light);
}

/* ===== Waveform ===== */
.visualizer-container {
  width: 100%;
  max-width: 320px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.waveform-canvas {
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.waveform-canvas.active {
  opacity: 1;
}

/* ===== Mic Button ===== */
.mic-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mic-ripple {
  position: absolute;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 2px solid var(--primary-glow);
  opacity: 0;
  pointer-events: none;
}

.mic-ripple.active {
  animation: ripple 1.5s ease-out infinite;
}

@keyframes ripple {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  100% {
    transform: scale(2.2);
    opacity: 0;
  }
}

.mic-btn {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  box-shadow: 0 4px 24px var(--primary-glow);
  position: relative;
  z-index: 1;
}

.mic-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 32px var(--primary-glow-strong);
}

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

.mic-btn.recording {
  background: linear-gradient(135deg, #ef4444, #f87171);
  box-shadow: 0 4px 24px rgba(239, 68, 68, 0.4);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 24px rgba(239, 68, 68, 0.4); }
  50% { box-shadow: 0 4px 40px rgba(239, 68, 68, 0.7); }
}

.mic-btn.processing {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  pointer-events: none;
  opacity: 0.7;
}

/* ===== Timer ===== */
.timer {
  font-size: 28px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text-primary);
  letter-spacing: 2px;
}

/* ===== Output Area ===== */
.output-area {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  animation: fadeUp 0.3s ease;
}

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

.output-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: var(--primary-light);
  min-height: 20px;
}

.output-status .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--primary-glow);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.output-text {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  min-height: 60px;
  white-space: pre-wrap;
  word-wrap: break-word;
  user-select: text;
  -webkit-user-select: text;
}

.output-text:empty {
  display: none;
}

.output-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.action-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

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

.action-btn.copied {
  color: var(--success);
  border-color: var(--success);
}

/* ===== Panels (Settings & History) ===== */
.panel {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.panel-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.panel-content {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  background: var(--bg-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-header h2 {
  font-size: 18px;
  font-weight: 600;
}

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

.panel-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 24px;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
  border-radius: 6px;
  transition: all var(--transition);
}

.panel-close:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

.panel-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

/* ===== Settings ===== */
.setting-group {
  margin-bottom: 20px;
}

.setting-group > label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.setting-input {
  width: 100%;
  padding: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition);
}

.setting-input:focus {
  border-color: var(--primary);
}

.setting-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 6px;
}

.setting-hint a {
  color: var(--primary-light);
  text-decoration: none;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-weight: 400;
}

.toggle input { display: none; }

.toggle-slider {
  width: 44px;
  height: 24px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 12px;
  position: relative;
  transition: all var(--transition);
  flex-shrink: 0;
}

.toggle-slider::after {
  content: '';
  width: 18px;
  height: 18px;
  background: var(--text-secondary);
  border-radius: 50%;
  position: absolute;
  top: 2px;
  left: 2px;
  transition: all var(--transition);
}

.toggle input:checked + .toggle-slider {
  background: var(--primary);
  border-color: var(--primary);
}

.toggle input:checked + .toggle-slider::after {
  transform: translateX(20px);
  background: white;
}

.toggle-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.primary-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: none;
  border-radius: 10px;
  color: white;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
}

.primary-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.text-btn {
  background: none;
  border: none;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: all var(--transition);
}

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

.text-btn.danger:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* ===== History ===== */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  padding: 40px 0;
}

.history-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.history-item:hover {
  border-color: var(--primary);
}

.history-item-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.history-item-time {
  font-size: 12px;
  color: var(--text-muted);
}

.history-item-lang {
  font-size: 11px;
  color: var(--primary-light);
  background: rgba(99, 102, 241, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

.history-item-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.history-item-delete {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  font-size: 16px;
  line-height: 1;
  border-radius: 4px;
  transition: color var(--transition);
}

.history-item-delete:hover {
  color: var(--danger);
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
  #app {
    max-width: 520px;
  }

  .mic-btn {
    width: 112px;
    height: 112px;
  }

  .mic-ripple {
    width: 112px;
    height: 112px;
  }

  .mic-btn svg {
    width: 40px;
    height: 40px;
  }
}

/* ===== Safe area for notched phones ===== */
@supports (padding-top: env(safe-area-inset-top)) {
  .header {
    padding-top: calc(16px + env(safe-area-inset-top));
  }
}