/* ==========================================================================
   CSS Design Tokens & Theme Variables (Light / Dark Support)
   ========================================================================== */
:root {
  /* Common Brand Colors */
  --emerald-500: #10b981;
  --emerald-400: #34d399;
  --cyan-500: #06b6d4;
  --cyan-400: #22d3ee;
  --blue-500: #3b82f6;
  --amber-500: #f59e0b;
  --purple-500: #8b5cf6;
  --pink-500: #ec4899;

  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'Outfit', sans-serif;

  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Dark Theme (Default)
   ========================================================================== */
[data-theme="dark"] {
  --bg-main: #090d16;
  --bg-card: rgba(16, 23, 38, 0.75);
  --bg-card-hover: rgba(23, 33, 54, 0.85);
  --bg-subtle: rgba(255, 255, 255, 0.04);
  --bg-input: rgba(15, 23, 42, 0.6);

  --border-main: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-focus: rgba(16, 185, 129, 0.4);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --shadow-card: 0 16px 36px -12px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  --shadow-hover: 0 20px 44px -10px rgba(0, 0, 0, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.12);

  --glow-1: rgba(16, 185, 129, 0.22);
  --glow-2: rgba(6, 182, 212, 0.22);
  --glow-3: rgba(139, 92, 246, 0.15);
  --chart-grid: rgba(255, 255, 255, 0.06);
  --chart-text: #94a3b8;
}

/* ==========================================================================
   Light Theme
   ========================================================================== */
[data-theme="light"] {
  --bg-main: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-subtle: rgba(0, 0, 0, 0.03);
  --bg-input: rgba(241, 245, 249, 0.8);

  --border-main: rgba(0, 0, 0, 0.08);
  --border-subtle: rgba(0, 0, 0, 0.04);
  --border-focus: rgba(16, 185, 129, 0.5);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --shadow-card: 0 12px 28px -8px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.02);
  --shadow-hover: 0 20px 36px -8px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.04);

  --glow-1: rgba(16, 185, 129, 0.15);
  --glow-2: rgba(6, 182, 212, 0.15);
  --glow-3: rgba(139, 92, 246, 0.10);
  --chart-grid: rgba(0, 0, 0, 0.06);
  --chart-text: #64748b;
}

/* ==========================================================================
   Base Reset
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal),
              color var(--transition-normal),
              box-shadow var(--transition-normal);
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Background Ambient Glows */
.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
  animation: auraFloat 16s ease-in-out infinite alternate;
}

.glow-1 {
  width: 500px;
  height: 500px;
  background: var(--glow-1);
  top: 5%;
  left: 10%;
}

.glow-2 {
  width: 550px;
  height: 550px;
  background: var(--glow-2);
  bottom: 5%;
  right: 10%;
  animation-delay: -8s;
}

.glow-3 {
  width: 400px;
  height: 400px;
  background: var(--glow-3);
  top: 45%;
  left: 45%;
}

@keyframes auraFloat {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-30px, 30px) scale(1.1); }
}

/* Main Wrapper */
.dashboard-wrapper {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 60px 24px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ==========================================================================
   Header Component
   ========================================================================== */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 20px;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--emerald-500);
  width: fit-content;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--emerald-500);
  box-shadow: 0 0 10px var(--emerald-500);
  animation: pulseAnim 2s infinite;
}

@keyframes pulseAnim {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

.dashboard-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.dashboard-subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* Controls: Theme Switch + Tabs */
.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* Theme Toggle Button (Light/Dark Mode) */
.theme-toggle-wrap {
  display: flex;
  align-items: center;
}

.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-main);
  padding: 8px 14px;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-card);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-focus);
}

.theme-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.sun-icon { color: var(--amber-500); }
.moon-icon { color: var(--cyan-400); }

[data-theme="dark"] .sun-icon { opacity: 0.4; }
[data-theme="dark"] .moon-icon { opacity: 1; }
[data-theme="light"] .sun-icon { opacity: 1; }
[data-theme="light"] .moon-icon { opacity: 0.4; }

/* Filter Tabs */
.filter-tabs {
  display: flex;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-main);
  gap: 4px;
  box-shadow: var(--shadow-card);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--emerald-500);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
}

/* ==========================================================================
   1. KPI Card Grid (4 Cards)
   ========================================================================== */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.kpi-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.kpi-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-hover);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-green { background: rgba(16, 185, 129, 0.12); color: var(--emerald-500); }
.icon-cyan { background: rgba(6, 182, 212, 0.12); color: var(--cyan-500); }
.icon-amber { background: rgba(245, 158, 11, 0.12); color: var(--amber-500); }
.icon-purple { background: rgba(139, 92, 246, 0.12); color: var(--purple-500); }

.badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.badge-cyan { background: rgba(6, 182, 212, 0.1); color: var(--cyan-500); border-color: rgba(6, 182, 212, 0.2); }
.badge-amber { background: rgba(245, 158, 11, 0.1); color: var(--amber-500); border-color: rgba(245, 158, 11, 0.2); }
.badge-purple { background: rgba(139, 92, 246, 0.1); color: var(--purple-500); border-color: rgba(139, 92, 246, 0.2); }

.card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kpi-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.kpi-value-wrapper {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.kpi-value {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.1;
}

.kpi-unit {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
}

.kpi-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Peak Time Spec */
.peak-time-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0;
}

.peak-item {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.peak-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.peak-hour {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--amber-500);
}

.peak-divider {
  color: var(--text-muted);
  font-weight: 300;
}

/* Ratio Num */
.ratio-bar-wrap {
  margin: 4px 0;
}

.ratio-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ratio-num strong { color: var(--blue-500); }
.ratio-num span { color: var(--pink-500); }

/* Progress & Card Footer */
.card-footer {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

.progress-bar-bg {
  width: 100%;
  height: 5px;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.8s ease;
}

.fill-green { background: linear-gradient(90deg, var(--emerald-500), var(--emerald-400)); }

.segmented-progress {
  display: flex;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  overflow: hidden;
  background: var(--bg-subtle);
}

.seg-fill { height: 100%; }
.fill-weekday { background: var(--blue-500); }
.fill-weekend { background: var(--pink-500); }

.footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.mini-stat-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.mini-label { color: var(--text-muted); }
.mini-value { font-weight: 700; color: var(--text-primary); }

.status-tag {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.tag-green { color: var(--emerald-500); }
.tag-cyan { color: var(--cyan-500); }
.tag-amber { color: var(--amber-500); }

/* ==========================================================================
   2. Charts Section (24H Hourly + Ratio Donut)
   ========================================================================== */
.charts-section {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
}

.chart-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chart-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
}

.chart-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.chart-subtitle {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Custom Chart Legend */
.chart-legend-custom {
  display: flex;
  align-items: center;
  gap: 10px;
}

.legend-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.dot-emerald { background-color: var(--emerald-500); }
.dot-blue { background-color: var(--blue-500); }
.dot-pink { background-color: var(--pink-500); }

.chart-canvas-container {
  position: relative;
  width: 100%;
  height: 280px;
}

.donut-container {
  height: 230px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.donut-center-info {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
}

.center-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.center-value {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

.chart-callout {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 14px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.callout-icon {
  font-size: 1rem;
}

.ratio-breakdown-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
}

.ratio-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.ratio-row strong {
  color: var(--text-primary);
  font-family: var(--font-display);
}

.ratio-row-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.color-indicator {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.bg-weekday { background-color: var(--blue-500); }
.bg-weekend { background-color: var(--pink-500); }

/* ==========================================================================
   3. TOP 10 Stations Section
   ========================================================================== */
.top10-section {
  width: 100%;
}

.top10-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.top10-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.top10-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--emerald-500);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-full);
}

.top10-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 12px;
}

.station-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition-fast);
}

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

.station-main-info {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.station-rank-name {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.rank-badge {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.rank-1 { background: #fef08a; color: #854d0e; border-color: #fde047; }
.rank-2 { background: #e2e8f0; color: #334155; border-color: #cbd5e1; }
.rank-3 { background: #fed7aa; color: #9a3412; border-color: #fdba74; }

.station-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.station-vol {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--emerald-500);
  flex-shrink: 0;
}

.station-bar-container {
  width: 100%;
  height: 6px;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.station-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--emerald-500), var(--cyan-400));
  border-radius: var(--radius-full);
  transition: width 0.8s ease;
}

.station-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Footer Component
   ========================================================================== */
.dashboard-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-main);
  border-radius: var(--radius-md);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.info-note {
  display: flex;
  align-items: center;
  gap: 8px;
}

.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border-main);
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.refresh-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-primary);
  border-color: var(--border-focus);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .charts-section {
    grid-template-columns: 1fr;
  }
  .dashboard-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 768px) {
  .dashboard-header {
    flex-direction: column;
    align-items: stretch;
  }
  .header-controls {
    justify-content: space-between;
  }
  .kpi-grid {
    grid-template-columns: 1fr;
  }
  .top10-grid {
    grid-template-columns: 1fr;
  }
  .dashboard-footer {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}