/* ─── Custom Properties ──────────────────────────────────────────────────── */

:root {
  /* Tarmac-dark base + aviation taxiway yellow (#FFD100 ≈ Pantone 109 C) */
  --color-bg:            #0a0a0a;
  --color-surface:       #111111;
  --color-surface-alt:   #191919;
  --color-border:        #2c2c2c;
  --color-border-hover:  #FFD100;
  --color-accent:        #FFD100;
  --color-accent-dim:    #c9a600;
  --color-text-primary:  #f0efe8;
  --color-text-secondary:#a8a49a;
  --color-text-muted:    #5c5952;
  --color-green:         #3fb950;
  --color-amber:         #d29922;
  --color-muted-badge:   #3a3a3a;

  --cabin-first:          #FFD100;
  --cabin-business:       #58a6ff;
  --cabin-premium-economy:#bc8cff;
  --cabin-economy:        #3fb950;

  --radius:    8px;
  --radius-sm: 4px;
  --gap:       1.5rem;
}

/* ─── Reset & Base ───────────────────────────────────────────────────────── */

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

[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
  /* Faint diagonal taxiway-stripe texture in aviation yellow */
  background-image: repeating-linear-gradient(
    135deg,
    transparent,
    transparent 40px,
    rgba(255, 209, 0, 0.025) 40px,
    rgba(255, 209, 0, 0.025) 41px
  );
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ─── Header ─────────────────────────────────────────────────────────────── */

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  font-size: 1.75rem;
  line-height: 1;
  filter: drop-shadow(0 0 8px rgba(255, 209, 0, 0.6));
}

.brand-text h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.brand-text p {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ─── Status Bar ─────────────────────────────────────────────────────────── */

.status-bar {
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 0.5rem 1.5rem;
  letter-spacing: 0.03em;
}

/* ─── Filter Bar ─────────────────────────────────────────────────────────── */

.filter-bar {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  min-width: 54px;
  flex-shrink: 0;
}

.filter-chip {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background-color 0.12s, border-color 0.12s, color 0.12s;
  white-space: nowrap;
  font-family: inherit;
}

.filter-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-chip.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #000;
  font-weight: 600;
}

.sort-sep {
  width: 1px;
  height: 1rem;
  background: var(--color-border);
  align-self: center;
  flex-shrink: 0;
  margin: 0 0.15rem;
}

.sort-dir-chip {
  font-variant-numeric: tabular-nums;
}

.no-results {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 3rem 0 1rem;
}

/* ─── Main Layout ────────────────────────────────────────────────────────── */

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.flights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: var(--gap);
}

/* ─── Flight Card ────────────────────────────────────────────────────────── */

.flight-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.flight-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-hover);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 209, 0, 0.15);
}

/* ─── Route Header ───────────────────────────────────────────────────────── */

.card-route {
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 1.1rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.route-endpoint {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  flex-shrink: 0;
}

.route-endpoint.dest {
  align-items: flex-end;
}

.iata {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  line-height: 1;
}

.city {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 0.15rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 90px;
}

.route-middle {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  min-width: 0;
  padding: 0 0.5rem;
}

.flight-number {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.route-line {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0;
}

.route-line-track {
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--color-accent) 0px,
    var(--color-accent) 4px,
    transparent 4px,
    transparent 8px
  );
  opacity: 0.5;
}

.route-line-arrow {
  font-size: 0.6rem;
  color: var(--color-accent);
  line-height: 1;
  margin-left: 2px;
  opacity: 0.7;
}

.duration {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ─── Live Status Badge ──────────────────────────────────────────────────── */

.live-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

[data-state="checking"] .status-dot {
  background: var(--color-muted-badge);
  animation: pulse 1.4s ease-in-out infinite;
}
[data-state="checking"] .status-label { color: var(--color-text-muted); }

[data-state="airborne"] .status-dot   { background: var(--color-green); box-shadow: 0 0 6px var(--color-green); }
[data-state="airborne"] .status-label { color: var(--color-green); }

[data-state="on-ground"] .status-dot  { background: var(--color-amber); }
[data-state="on-ground"] .status-label{ color: var(--color-amber); }

[data-state="unknown"] .status-dot    { background: var(--color-muted-badge); }
[data-state="unknown"] .status-label  { color: var(--color-text-muted); }

[data-state="hex-needed"] .status-dot {
  background: transparent;
  border: 1px solid var(--color-muted-badge);
}
[data-state="hex-needed"] .status-label { color: var(--color-text-muted); }

.status-callsign {
  color: var(--color-text-secondary);
  font-weight: 400;
  letter-spacing: 0.04em;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

/* ─── Card Details ───────────────────────────────────────────────────────── */

.card-details {
  padding: 0.25rem 0;
  flex: 1;
}

.detail-row {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.45rem 1.25rem;
  border-bottom: 1px solid rgba(48, 54, 61, 0.5);
  font-size: 0.85rem;
}

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

.detail-row .label {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  min-width: 60px;
  flex-shrink: 0;
}

.detail-row .value {
  color: var(--color-text-secondary);
}

.cabin-first           { color: var(--cabin-first) !important; font-weight: 600; }
.cabin-business        { color: var(--cabin-business) !important; font-weight: 600; }
.cabin-premium-economy { color: var(--cabin-premium-economy) !important; font-weight: 600; }
.cabin-economy         { color: var(--cabin-economy) !important; font-weight: 600; }

/* ─── Track Aircraft Row ─────────────────────────────────────────────────── */

.detail-row--track {
  align-items: flex-start;
}

.track-right {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
  min-width: 0;
}

.detail-row--track .live-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0;
  border: none;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.tracking-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.track-link {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: background-color 0.12s, border-color 0.12s, color 0.12s;
  cursor: pointer;
}

.track-link:hover {
  background-color: var(--color-accent-dim);
  border-color: var(--color-accent);
  color: var(--color-text-primary);
  text-decoration: none;
}

.track-link--disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.track-link--disabled:hover {
  background-color: var(--color-surface-alt);
  border-color: var(--color-border);
  color: var(--color-text-secondary);
}

/* ─── YouTube Embed ──────────────────────────────────────────────────────── */

.video-container {
  position: relative;
  padding-top: 56.25%; /* 16:9 */
  background-color: #000;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ─── Card Footer ────────────────────────────────────────────────────────── */

.card-meta {
  padding: 0.6rem 1.25rem;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface-alt);
}

.review-date {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ─── Site Footer ────────────────────────────────────────────────────────── */

.site-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  margin-top: 2rem;
}

.site-footer a {
  color: var(--color-text-muted);
}

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

/* ─── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 420px) {
  .flights-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    padding: 0.85rem 1rem;
  }

  main {
    padding: 1.25rem 1rem;
  }

  .filter-bar {
    padding: 0.65rem 1rem;
  }

  .filter-group {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px; /* prevent scrollbar clipping */
    -webkit-overflow-scrolling: touch;
  }

  .iata {
    font-size: 1.3rem;
  }

  .city {
    max-width: 70px;
  }
}