:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --border: #e2e6f0;
  --text: #1a1f36;
  --text-muted: #6b7280;
  --primary: #ff5a3c;
  --primary-dark: #e6461f;
  --accent: #2b6bff;
  --success: #1ba55c;
  --warn: #b4740e;
  --danger: #d1352f;
  --radius: 14px;
  --shadow: 0 4px 20px rgba(20, 30, 60, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 32px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { font-size: 22px; font-weight: 800; letter-spacing: -0.02em; }
.brand span { color: var(--primary); }

.user-box { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-muted); }
.link-btn {
  background: none; border: none; color: var(--accent); cursor: pointer;
  font-size: 13px; text-decoration: underline; padding: 0;
}

main { max-width: 920px; margin: 0 auto; padding: 40px 20px 80px; }

.search-panel {
  background: linear-gradient(135deg, #1a1f36 0%, #2b3563 100%);
  border-radius: var(--radius);
  padding: 36px;
  color: white;
  box-shadow: var(--shadow);
}
.search-panel h1 { margin: 0 0 22px; font-size: 26px; font-weight: 700; }

.search-form {
  display: grid;
  grid-template-columns: 1fr auto 1fr 200px auto;
  gap: 14px;
  align-items: end;
}
.mode-field { grid-row: 2; grid-column: 1 / -1; }
.mode-toggle { max-width: 320px; }
.search-form .primary-btn { grid-row: 1; grid-column: 5; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; opacity: 0.75; }
.field select, .field input {
  padding: 12px 14px;
  border-radius: 10px;
  border: none;
  font-size: 15px;
  background: rgba(255,255,255,0.95);
  color: var(--text);
}

.mode-toggle {
  display: flex;
  background: rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 3px;
  gap: 2px;
}
.mode-opt {
  flex: 1;
  border: none;
  background: transparent;
  color: rgba(255,255,255,0.8);
  padding: 10px 0;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.mode-opt:hover { background: rgba(255,255,255,0.1); }
.mode-opt.active { background: rgba(255,255,255,0.95); color: var(--text); }
.swap { display: flex; align-items: center; padding-bottom: 10px; }
.swap button {
  width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.1); color: white; font-size: 16px; cursor: pointer;
}
.swap button:hover { background: rgba(255,255,255,0.2); }

.primary-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 13px 22px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s;
}
.primary-btn:hover { background: var(--primary-dark); }
.primary-btn:disabled { opacity: 0.6; cursor: default; }

@media (max-width: 760px) {
  .search-form { grid-template-columns: 1fr; }
  .swap { display: none; }
  .mode-field, .search-form .primary-btn { grid-row: auto; grid-column: auto; }
  .mode-toggle { max-width: none; }
}

.status-area { margin-top: 28px; text-align: center; color: var(--text-muted); padding: 30px; }
.status-area .spinner {
  width: 28px; height: 28px; border: 3px solid var(--border); border-top-color: var(--primary);
  border-radius: 50%; margin: 0 auto 12px; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.status-area.error { color: var(--danger); }

.results-area { margin-top: 32px; }
.results-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; flex-wrap: wrap; gap: 8px; }
.results-header h2 { font-size: 17px; font-weight: 600; color: var(--text-muted); margin: 0; }
.degraded-notice {
  background: #fff4e5; color: var(--warn); border: 1px solid #ffe0ad;
  padding: 6px 12px; border-radius: 8px; font-size: 13px;
}

.results-list { display: flex; flex-direction: column; gap: 14px; }

.trip-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
}
.trip-top { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: 8px; }
.trip-op { font-weight: 700; font-size: 15px; }
.trip-vehicle { color: var(--text-muted); font-size: 13px; }

.mode-badge {
  display: inline-block; font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.04em; padding: 2px 7px; border-radius: 999px; margin-right: 6px;
  vertical-align: middle;
}
.mode-badge.bus { background: #eef3ff; color: var(--accent); }
.mode-badge.train { background: #fff0e6; color: #c2622a; }
.mode-badge.flight { background: #eefaf1; color: var(--success); }

.trip-times {
  display: flex; align-items: center; gap: 18px; margin-top: 12px; font-size: 15px;
}
.trip-times .time { font-weight: 700; font-size: 19px; }
.trip-times .date-sub { display: block; font-size: 11px; color: var(--text-muted); font-weight: 400; }
.trip-times .duration { flex: 1; text-align: center; color: var(--text-muted); font-size: 13px; position: relative; }
.trip-times .duration::before {
  content: ""; display: block; height: 1px; background: var(--border); margin-bottom: 6px;
}

.classes-row { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.class-chip {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  background: #fafbfe;
  transition: border-color 0.15s, background 0.15s;
  min-width: 120px;
}
.class-chip:hover { border-color: var(--accent); background: #eef3ff; }
.class-chip .cls-name { font-size: 12px; text-transform: capitalize; color: var(--text-muted); }
.class-chip .cls-fare { font-weight: 700; font-size: 16px; margin-top: 2px; }
.class-chip .cls-seats { font-size: 11px; color: var(--success); margin-top: 2px; }
.class-chip.sold-out { opacity: 0.5; cursor: not-allowed; }
.class-chip.sold-out .cls-seats { color: var(--danger); }

.empty-state { text-align: center; padding: 50px 20px; color: var(--text-muted); }
.empty-state .big { font-size: 40px; margin-bottom: 10px; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(20, 24, 40, 0.55);
  display: flex; align-items: center; justify-content: center; z-index: 100; padding: 20px;
}
/* display:flex above is an author rule and beats the browser's built-in
   [hidden] { display: none }, so setting element.hidden = true had no
   visual effect - the modal stayed on screen forever even though the JS
   underneath was working correctly. Higher-specificity override: */
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--surface); border-radius: var(--radius); padding: 28px;
  width: 100%; max-width: 480px; max-height: 85vh; overflow-y: auto; position: relative;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}
.modal.small { max-width: 360px; }
.modal-close {
  position: absolute; top: 14px; right: 16px; background: none; border: none;
  font-size: 22px; cursor: pointer; color: var(--text-muted); line-height: 1;
}
.modal h3 { margin-top: 0; }
.modal .muted { color: var(--text-muted); font-size: 13px; }
.modal input[type=text] {
  width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--border);
  font-size: 15px; margin: 14px 0; box-sizing: border-box;
}

.seat-grid { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.seat-chip {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 12px;
  cursor: pointer; font-size: 13px; font-weight: 600; background: #fafbfe;
}
.seat-chip.selected { background: var(--primary); color: white; border-color: var(--primary); }

.summary-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 14px; }
.summary-row.total { font-weight: 700; font-size: 16px; border-top: 1px dashed var(--border); margin-top: 6px; padding-top: 12px; }

.booking-result { text-align: center; padding: 10px 0; }
.booking-result .icon { font-size: 44px; margin-bottom: 10px; }
.pnr-box {
  background: #f4f6fb; border: 1px dashed var(--border); border-radius: 10px;
  padding: 14px; margin: 16px 0; font-family: monospace; font-size: 20px; letter-spacing: 2px;
}
.status-badge {
  display: inline-block; padding: 4px 12px; border-radius: 999px; font-size: 12px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.03em;
}
.status-badge.confirmed { background: #e6f7ec; color: var(--success); }
.status-badge.failed, .status-badge.cancelled { background: #fdeceb; color: var(--danger); }
.status-badge.held, .status-badge.paid, .status-badge.refunding, .status-badge.pending { background: #fff4e5; color: var(--warn); }

.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: white; padding: 12px 20px; border-radius: 10px;
  font-size: 14px; z-index: 200; box-shadow: var(--shadow);
}
.toast.error { background: var(--danger); }