/* Sherpa Voice Assistant - Responsive Stylesheet */
:root {
  --primary: #1976D2;
  --primary-dark: #0D47A1;
  --primary-light: #E3F2FD;
  --bg: #F5F7FA;
  --card-bg: #FFFFFF;
  --input-bg: #F8FAFC;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --divider: #E2E8F0;
  --danger: #E53935;
  --danger-light: #FFEBEE;
  --success: #2E7D32;
  --success-light: #E8F5E9;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --primary: #38BDF8;
  --primary-dark: #0284C7;
  --primary-light: #0C4A6E;
  --bg: #121316;
  --card-bg: #1E2026;
  --input-bg: #262930;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border: #2D3139;
  --divider: #2D3139;
  --danger: #EF4444;
  --danger-light: #451A1A;
  --success: #22C55E;
  --success-light: #052E16;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--bg);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  max-width: 860px;
  margin: 0 auto;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 28px;
  height: 28px;
  fill: #FFFFFF;
}

.app-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.theme-toggle-btn {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #FFFFFF;
  font-size: 16px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Tab Navigation */
.tab-nav {
  display: flex;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 6px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.tab-btn {
  flex: 1;
  padding: 11px 4px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  text-align: center;
  transition: var(--transition);
}

.tab-btn:hover {
  color: #FFFFFF;
}

.tab-btn.active {
  color: #FFFFFF;
  font-weight: 700;
}

.tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 20%;
  right: 20%;
  height: 3px;
  background-color: #FFFFFF;
  border-radius: 3px 3px 0 0;
}

/* iOS PWA Banner */
.ios-pwa-tip {
  background-color: var(--primary-light);
  color: var(--primary);
  padding: 8px 16px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.ios-pwa-tip span {
  flex: 1;
}

.close-tip-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 16px;
  cursor: pointer;
  padding-left: 8px;
}

/* Main Container */
.main-content {
  flex: 1;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 16px;
}

.tab-panel {
  display: none;
  animation: fadeIn 0.25s ease forwards;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Textarea & Inputs */
.transcript-box {
  width: 100%;
  min-height: 140px;
  background-color: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-primary);
  resize: vertical;
  outline: none;
  transition: var(--transition);
}

.transcript-box:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

.box-actions-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
  padding-top: 6px;
}

.word-count-badge {
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--input-bg);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
}

.action-buttons-group {
  display: flex;
  gap: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-tonal {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: transparent;
}

.btn-tonal:hover {
  filter: brightness(0.95);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border);
  color: var(--text-primary);
}

.btn-outline:hover {
  background-color: var(--input-bg);
}

.btn-danger-text {
  background-color: transparent;
  color: var(--danger);
  border: none;
}

/* STT Mode Selector Toolbar */
.stt-toolbar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 12px 0 10px 0;
  padding: 8px 12px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.stt-mode-pills {
  display: inline-flex;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 4px;
}

.mode-pill {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
}

.mode-pill:hover {
  color: var(--text-primary);
}

.mode-pill.active {
  background-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(25, 118, 210, 0.35);
}

.stt-lang-select-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-select {
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 12.5px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 5px 8px;
  outline: none;
  cursor: pointer;
}

/* Waveform Visualizer */
.waveform-container {
  width: 100%;
  max-width: 540px;
  margin: 14px auto 6px auto;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.3s ease;
}

#waveformCanvas {
  width: 100%;
  height: 70px;
  border-radius: var(--radius-sm);
}

.audio-level-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
}

.live-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--danger);
  animation: liveBlink 1.2s infinite;
}

@keyframes liveBlink {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.85); }
}

/* Big Mic Action Button */
.mic-control-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px 0 12px 0;
}

.mic-btn-wrapper {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mic-btn {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #FFFFFF;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 4px 14px rgba(25, 118, 210, 0.35);
  transition: var(--transition);
  z-index: 2;
}

.mic-btn:hover {
  transform: scale(1.05);
}

.mic-btn.recording {
  background: linear-gradient(135deg, #EF4444, #B91C1C);
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.4);
}

.mic-pulse-ring {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: var(--radius-full);
  background-color: var(--danger);
  opacity: 0;
  z-index: 1;
  pointer-events: none;
}

.mic-btn.recording ~ .mic-pulse-ring {
  animation: pulseRing 1.5s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulseRing {
  0% { transform: scale(0.9); opacity: 0.8; }
  50% { opacity: 0.4; }
  100% { transform: scale(1.4); opacity: 0; }
}

.record-timer {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 10px;
}

.status-hint {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 6px;
  text-align: center;
}

/* Inline Review Player */
.review-player-card {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.review-player-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.review-player-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

.player-controls-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.audio-slider {
  flex: 1;
  accent-color: var(--primary);
  cursor: pointer;
}

.player-time-display {
  font-size: 12px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

/* Capsule Tag */
.capsule-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background-color: var(--primary-light);
  border: 1px solid var(--primary);
  color: var(--primary);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.capsule-tag:hover {
  filter: brightness(0.95);
  transform: translateY(-1px);
}

/* History List & Cards */
.history-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 6px 12px 6px;
}

.history-count-text {
  font-size: 13px;
  color: var(--text-secondary);
}

.history-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
}

.history-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 12px;
}

.history-meta-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.source-badge {
  background: var(--primary-light);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 11px;
}

.history-date {
  color: var(--text-secondary);
}

.history-meta-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.history-duration {
  font-weight: 700;
  color: var(--text-primary);
}

.history-size {
  color: var(--text-muted);
}

.history-text-content {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 10px;
  word-break: break-word;
}

.history-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid var(--divider);
}

.history-actions-left {
  display: flex;
  gap: 6px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--text-secondary);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 12px;
  opacity: 0.6;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}

.modal-overlay.open {
  display: flex;
  animation: fadeIn 0.2s ease;
}

.modal-box {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 440px;
  padding: 20px;
  box-shadow: var(--shadow-lg);
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.modal-input {
  width: 100%;
  min-height: 80px;
  padding: 10px;
  border: 1px solid var(--border);
  background-color: var(--input-bg);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  margin-bottom: 16px;
  outline: none;
}

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

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

/* Readme Tab Styling */
.readme-list {
  list-style: none;
}

.readme-list li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 8px;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  .header-top {
    padding: 10px 14px;
  }
  .app-title {
    font-size: 16px;
  }
  .tab-btn {
    font-size: 13px;
    padding: 10px 2px;
  }
  .main-content {
    padding: 12px;
  }
}