/* ═══════════════════════════════════════════════════════
   DriveSense AI — Premium Dark Theme
   ═══════════════════════════════════════════════════════ */

/* ── Google Font ────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Design Tokens ──────────────────────────────────── */
:root {
  --bg-primary: #060a13;
  --bg-secondary: #0c1220;
  --bg-card: rgba(12, 18, 35, 0.75);
  --bg-card-hover: rgba(18, 27, 50, 0.85);

  --border: rgba(99, 102, 241, 0.12);
  --border-glow: rgba(99, 102, 241, 0.3);

  --accent: #6366f1;
  --accent-light: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.4);

  --success: #00e676;
  --success-glow: rgba(0, 230, 118, 0.3);
  --warning: #ffa726;
  --warning-glow: rgba(255, 167, 38, 0.3);
  --danger: #ef5350;
  --danger-glow: rgba(239, 83, 80, 0.4);

  --text-primary: #e2e8f0;
  --text-secondary: rgba(226, 232, 240, 0.55);
  --text-muted: rgba(226, 232, 240, 0.3);

  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 64px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px var(--accent-glow);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Background Ambiance ───────────────────────────── */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 230, 118, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(239, 83, 80, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
  animation: ambiance 20s ease-in-out infinite alternate;
}

@keyframes ambiance {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-2%, 1%) rotate(1deg); }
}

/* ── App Container ──────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 12px 16px;
  gap: 12px;
}

/* ── Header ─────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.header__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header__logo {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  box-shadow: 0 0 20px var(--accent-glow);
}

.header__title {
  font-size: 1.3rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.header__subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.header__clock {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 6px 14px;
  background: rgba(255,255,255,0.04);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ── Status Indicator ──────────────────────────────── */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 12px var(--success-glow);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-dot.warning { background: var(--warning); box-shadow: 0 0 12px var(--warning-glow); }
.status-dot.danger { background: var(--danger); box-shadow: 0 0 12px var(--danger-glow); animation: pulse-dot-fast 0.8s ease-in-out infinite; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.3); }
}

@keyframes pulse-dot-fast {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

/* ── Control Buttons ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-glow);
  box-shadow: 0 0 16px var(--accent-glow);
}

.btn.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent);
  color: var(--accent-light);
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  border-color: transparent;
  color: #fff;
}

.btn--primary:hover {
  box-shadow: 0 4px 24px var(--accent-glow);
  transform: translateY(-1px);
}

.btn--danger {
  background: rgba(239, 83, 80, 0.15);
  border-color: rgba(239, 83, 80, 0.3);
  color: var(--danger);
}

/* ── Select Dropdown ───────────────────────────────── */
.select {
  padding: 8px 14px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  outline: none;
  transition: var(--transition);
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236366f1' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 32px;
}

.select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.select:hover, .select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ── Speed Control ─────────────────────────────────── */
.speed-control {
  display: flex;
  align-items: center;
  gap: 4px;
}

.speed-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.speed-btn:hover, .speed-btn.active {
  background: rgba(99, 102, 241, 0.2);
  border-color: var(--accent);
  color: var(--accent-light);
}

/* ── Dashboard Grid ────────────────────────────────── */
.dashboard {
  display: grid;
  grid-template-columns: 320px 1fr 320px;
  grid-template-rows: 1fr auto;
  gap: 12px;
  flex: 1;
}

/* ── Card Base ─────────────────────────────────────── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
  opacity: 0;
  transition: var(--transition);
}

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

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.card__title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.card__badge {
  padding: 3px 10px;
  font-size: 0.65rem;
  font-weight: 600;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.card__badge.safe {
  background: rgba(0, 230, 118, 0.12);
  color: var(--success);
  border: 1px solid rgba(0, 230, 118, 0.25);
}

.card__badge.warning {
  background: rgba(255, 167, 38, 0.12);
  color: var(--warning);
  border: 1px solid rgba(255, 167, 38, 0.25);
}

.card__badge.danger {
  background: rgba(239, 83, 80, 0.12);
  color: var(--danger);
  border: 1px solid rgba(239, 83, 80, 0.25);
  animation: badge-pulse 1.5s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ── Driver Monitor Panel ──────────────────────────── */
.driver-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.face-monitor {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
}

.face-canvas {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

/* ── Metric Row (in driver panel) ──────────────────── */
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.metric {
  padding: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition);
}

.metric:hover {
  border-color: var(--border-glow);
  background: rgba(255, 255, 255, 0.05);
}

.metric__label {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.metric__value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.metric__value.safe { color: var(--success); }
.metric__value.warning { color: var(--warning); }
.metric__value.danger { color: var(--danger); }

/* ── Center Panel ──────────────────────────────────── */
.center-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Safety Score Display ──────────────────────────── */
.score-display {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px;
}

.score-gauge {
  position: relative;
  width: 150px;
  height: 150px;
  flex-shrink: 0;
}

.score-gauge canvas {
  width: 150px;
  height: 150px;
}

.score-gauge__value {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.score-gauge__number {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
}

.score-gauge__letter {
  font-size: 1rem;
  font-weight: 700;
  margin-top: 2px;
}

.score-details {
  flex: 1;
}

.score-detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.score-detail-row:last-child { border-bottom: none; }

.score-detail-row__label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.score-detail-row__value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}

.score-detail-row__bar {
  width: 60px;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  overflow: hidden;
  margin-left: 8px;
}

.score-detail-row__bar-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.5s ease;
}

/* ── Chart Container ───────────────────────────────── */
.chart-container {
  flex: 1;
  min-height: 220px;
  position: relative;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ── Prediction Panel ──────────────────────────────── */
.prediction-panel {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
}

.prediction__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.prediction__icon.safe { 
  background: rgba(0, 230, 118, 0.12);
  border: 1px solid rgba(0, 230, 118, 0.2);
}

.prediction__icon.warning { 
  background: rgba(255, 167, 38, 0.12);
  border: 1px solid rgba(255, 167, 38, 0.2);
}

.prediction__icon.danger { 
  background: rgba(239, 83, 80, 0.12);
  border: 1px solid rgba(239, 83, 80, 0.2);
}

.prediction__text {
  flex: 1;
}

.prediction__title {
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.prediction__desc {
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.prediction__eta {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  text-align: right;
}

.prediction__eta-label {
  font-size: 0.6rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Alert Panel (Right) ──────────────────────────── */
.alert-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.alert-feed {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 500px;
  overflow-y: auto;
  padding-right: 4px;
}

.alert-feed::-webkit-scrollbar {
  width: 4px;
}

.alert-feed::-webkit-scrollbar-track {
  background: transparent;
}

.alert-feed::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

.alert-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  animation: alert-slide-in 0.3s ease-out;
  transition: var(--transition);
}

.alert-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

.alert-item.info { border-left: 3px solid #42a5f5; }
.alert-item.warning { border-left: 3px solid var(--warning); }
.alert-item.critical { border-left: 3px solid var(--danger); }

@keyframes alert-slide-in {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

.alert-item__icon {
  font-size: 1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert-item__content {
  flex: 1;
  min-width: 0;
}

.alert-item__message {
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.4;
}

.alert-item__time {
  font-size: 0.6rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 3px;
}

/* ── Session Stats ─────────────────────────────────── */
.session-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.session-stat {
  padding: 10px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 6px;
  text-align: center;
}

.session-stat__label {
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.session-stat__value {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
}

/* ── Bottom Bar ────────────────────────────────────── */
.bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.trip-stats {
  display: flex;
  gap: 32px;
}

.trip-stat {
  display: flex;
  align-items: center;
  gap: 8px;
}

.trip-stat__icon {
  font-size: 1.1rem;
  opacity: 0.7;
}

.trip-stat__label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.trip-stat__value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
}

.powered-by {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.03em;
}

.powered-by span {
  color: var(--accent-light);
  font-weight: 600;
}

/* ── Critical Alert Overlay ────────────────────────── */
.critical-overlay {
  position: fixed;
  inset: 0;
  background: rgba(239, 83, 80, 0.08);
  z-index: 1000;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  animation: none;
}

.critical-overlay.active {
  opacity: 1;
  animation: screen-pulse 1.2s ease-in-out infinite;
  pointer-events: auto;
}

.critical-overlay__content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: auto;
}

.critical-overlay__text {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--danger);
  text-shadow: 0 0 60px var(--danger-glow), 0 0 120px rgba(239, 83, 80, 0.3);
  letter-spacing: 0.1em;
  animation: text-pulse 0.8s ease-in-out infinite alternate;
}

.critical-overlay__sub {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 12px;
  font-weight: 500;
}

.critical-overlay__dismiss {
  margin-top: 24px;
  padding: 10px 28px;
  font-size: 0.85rem;
  font-weight: 600;
  background: rgba(239, 83, 80, 0.2);
  border: 2px solid var(--danger);
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  pointer-events: auto;
  transition: var(--transition);
}

.critical-overlay__dismiss:hover {
  background: var(--danger);
}

@keyframes screen-pulse {
  0%, 100% { background: rgba(239, 83, 80, 0.05); }
  50% { background: rgba(239, 83, 80, 0.12); }
}

@keyframes text-pulse {
  0% { transform: scale(1); }
  100% { transform: scale(1.04); }
}

/* ── Empty State ───────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state__icon {
  font-size: 2rem;
  opacity: 0.5;
}

.empty-state__text {
  font-size: 0.75rem;
}

/* ── Scenario Description ──────────────────────────── */
.scenario-info {
  padding: 12px 16px;
  background: rgba(99, 102, 241, 0.06);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.scenario-info strong {
  color: var(--accent-light);
  font-weight: 600;
}

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 1200px) {
  .dashboard {
    grid-template-columns: 280px 1fr 280px;
  }
}

@media (max-width: 960px) {
  .dashboard {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  
  .header {
    flex-wrap: wrap;
    gap: 12px;
  }

  .trip-stats {
    gap: 16px;
    flex-wrap: wrap;
  }
}

/* ── Attention Heatmap ─────────────────────────────── */
.heatmap-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.3);
}

.heatmap-container canvas {
  width: 100%;
  height: 100%;
}

/* ── Toasts ────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  padding: 14px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  animation: toast-in 0.4s ease-out;
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 280px;
}

.toast.info { border-left: 3px solid #42a5f5; }
.toast.warning { border-left: 3px solid var(--warning); }
.toast.critical { border-left: 3px solid var(--danger); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

.toast-exit {
  animation: toast-out 0.3s ease-in forwards;
}

@keyframes toast-out {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(40px); }
}