/* ==========================================
   KI Tracker - Design System & Styles
   ========================================== */

:root {
  /* Color Palette - Dark Theme */
  --bg-primary: #0f0f14;
  --bg-secondary: #1a1a24;
  --bg-card: #24243a;
  --bg-card-hover: #2e2e4a;

  /* Accent Colors */
  --accent-lead: #6366f1;
  --accent-lead-light: #818cf8;
  --accent-boulder: #f59e0b;
  --accent-boulder-light: #fbbf24;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;

  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #a1a1b5;
  --text-muted: #6b6b80;

  /* Gradients */
  --gradient-lead: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-boulder: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  --gradient-card: linear-gradient(145deg, #24243a 0%, #1a1a24 100%);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow-lead: 0 0 30px rgba(99, 102, 241, 0.3);
  --shadow-glow-boulder: 0 0 30px rgba(245, 158, 11, 0.3);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ==========================================
   Base Styles
   ========================================== */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}

/* ==========================================
   Container
   ========================================== */

.container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-md);
  padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom, 0));
}

/* ==========================================
   Header
   ========================================== */

.header {
  text-align: center;
  padding: var(--spacing-lg) 0;
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: var(--spacing-xs);
}

/* ==========================================
   Status Cards
   ========================================== */

.current-status {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.status-card {
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), opacity var(--transition-normal), filter var(--transition-normal);
  cursor: pointer;
  user-select: none;
}

.status-card.inactive {
  opacity: 0.5;
  filter: grayscale(0.8);
  box-shadow: none !important;
  transform: scale(0.98);
}

.status-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.status-card.lead::before {
  background: var(--gradient-lead);
}

.status-card.boulder::before {
  background: var(--gradient-boulder);
}

.status-card:hover {
  transform: translateY(-2px);
}

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

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

.status-card .label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.status-card .value {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
}

.status-card.lead .value {
  color: var(--accent-lead-light);
}

.status-card.boulder .value {
  color: var(--accent-boulder-light);
}

.status-card .unit {
  font-size: 1.5rem;
  font-weight: 500;
  opacity: 0.7;
}

.progress-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  margin-top: var(--spacing-md);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width var(--transition-slow);
}

.status-card.lead .progress-fill {
  background: var(--gradient-lead);
}

.status-card.boulder .progress-fill {
  background: var(--gradient-boulder);
}

/* ==========================================
   Last Updated
   ========================================== */

.last-updated {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: var(--spacing-lg);
}

.refresh-btn {
  background: transparent;
  border: 1px solid var(--text-muted);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1rem;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.refresh-btn.loading {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

/* ==========================================
   Time Filter
   ========================================== */

.time-filter {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  background: var(--bg-secondary);
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
}

.filter-btn {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.filter-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ==========================================
   Chart
   ========================================== */

.chart-container {
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

#occupancy-chart {
  width: 100%;
  height: 250px;
}

/* Multi-chart Layouts */
.charts-container {
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.charts-container.two-day {
  flex-direction: row;
}

.charts-container.week {
  flex-direction: column;
}

/* Individual Chart Wrapper */
.day-chart-wrapper {
  background: rgba(255, 255, 255, 0.03);
  /* Subtle background for each day */
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  flex: 1;
  min-width: 0;
  /* Prevent flex overflow */
  position: relative;
}

.day-chart-wrapper .date-label {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-size: 1rem;
  padding-left: var(--spacing-xs);
  letter-spacing: 0.01em;
}

/* Chart Canvas Sizing */
.day-chart-wrapper canvas {
  width: 100% !important;
  height: 250px !important;
  /* Default height for single day */
}

.charts-container.week .day-chart-wrapper canvas {
  height: 120px !important;
}

.charts-container.two-day .day-chart-wrapper canvas {
  height: 200px !important;
}

@media (max-width: 600px) {
  .charts-container.two-day {
    flex-direction: column;
  }
}

/* ==========================================
   Best Times
   ========================================== */

.best-times {
  background: var(--gradient-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.best-times h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.times-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--spacing-sm);
}

.time-slot {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
  text-align: center;
}

.time-slot.good {
  border-left: 3px solid var(--accent-success);
}

.time-slot.medium {
  border-left: 3px solid var(--accent-warning);
}

.time-slot.busy {
  border-left: 3px solid var(--accent-danger);
}

.time-slot .time {
  font-weight: 600;
  font-size: 0.95rem;
}

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

/* ==========================================
   Footer
   ========================================== */

.footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer a {
  color: var(--accent-lead-light);
  text-decoration: none;
  display: block;
  margin-top: var(--spacing-sm);
  transition: color var(--transition-fast);
}

.footer a:hover {
  color: var(--text-primary);
}

/* ==========================================
   Responsive
   ========================================== */

@media (max-width: 400px) {
  .status-card .value {
    font-size: 2.5rem;
  }

  .filter-btn {
    font-size: 0.8rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

/* ==========================================
   Dark Mode Scrollbar
   ========================================== */

::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--bg-card);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--bg-card-hover);
}