:root {
  --bg: #0b1220;
  --panel: #121b2e;
  --panel-2: #1a2540;
  --text: #e8edf7;
  --muted: #9aa6bf;
  --accent: #fbbf24;
  --accent-2: #38bdf8;
  --good: #4ade80;
  --warn: #f97316;
  --border: #243049;
}
* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
}
.topbar {
  padding: env(safe-area-inset-top) 16px 8px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: baseline;
}
.topbar h1 { font-size: 18px; margin: 8px 0; }
.muted { color: var(--muted); font-size: 13px; }

.share-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 12px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.share-bar .share-label {
  flex: 0 0 auto; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.share-bar .share-url {
  flex: 1 1 auto; min-width: 0;
  color: var(--accent-2); font-family: monospace;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.share-bar .share-copy {
  flex: 0 0 auto; min-width: auto;
  padding: 4px 12px; font-size: 12px;
}

.tabs {
  display: flex;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 5;
}
.tab-btn {
  flex: 1; padding: 12px 4px;
  background: transparent; color: var(--muted);
  border: none; border-bottom: 2px solid transparent;
  font-size: 13px; font-weight: 600;
}
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

main { padding: 12px; padding-bottom: env(safe-area-inset-bottom); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.controls {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 12px;
  display: flex; flex-direction: column; gap: 10px;
}
.controls label {
  display: flex; flex-direction: column; gap: 4px;
  font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em;
}
.controls input, .controls select, .controls textarea {
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 10px; font-size: 15px;
}
.controls .row { display: flex; gap: 8px; flex-wrap: wrap; }

button {
  background: var(--accent); color: #1a1a1a;
  border: none; border-radius: 8px;
  padding: 10px 14px; font-weight: 600; font-size: 14px;
  flex: 1; min-width: 110px;
}
button.secondary { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
button.danger { background: #2a1626; color: #fda4af; border: 1px solid #5b1f33; }

.destinations { font-size: 12px; }
.chip {
  display: inline-block; margin: 4px 4px 0 0;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--panel-2); color: var(--muted);
  border: 1px solid var(--border);
  font-size: 13px; cursor: pointer;
}
.chip.on { background: var(--accent-2); color: #082338; border-color: var(--accent-2); }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; margin-bottom: 10px;
}
.card h3 { margin: 0 0 6px; font-size: 15px; }
.card .price { font-size: 22px; font-weight: 700; color: var(--accent); }
.card .price.none { color: var(--warn); font-size: 14px; font-weight: normal; }
.card .meta { color: var(--muted); font-size: 13px; }
.card a.deeplink { color: var(--accent-2); font-size: 13px; }
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  background: var(--panel-2); color: var(--muted);
  font-size: 11px; margin-left: 6px;
}
.badge.api { color: var(--good); }
.badge.playwright { color: var(--accent-2); }
.badge.deeplink { color: var(--warn); }
.badge.cache { color: var(--muted); }

.opt-list { margin: 6px 0; }
.opt-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto auto;
  gap: 8px; align-items: center;
  padding: 6px 0; border-bottom: 1px dashed var(--border);
  font-size: 13px;
}
.opt-row:last-child { border-bottom: none; }
.opt-price { color: var(--accent); font-weight: 700; min-width: 56px; }
.opt-times { color: var(--text); font-variant-numeric: tabular-nums; }
.opt-fnum { color: var(--muted); font-size: 11px; }
.opt-pick { min-width: auto; padding: 4px 10px; font-size: 11px; }

/* Calendar matrix */
.calendar-scroll { overflow-x: auto; }
table.cal {
  border-collapse: collapse; min-width: 100%;
}
table.cal th, table.cal td {
  border: 1px solid var(--border);
  padding: 6px 8px; font-size: 12px;
  white-space: nowrap; text-align: center;
}
table.cal th { background: var(--panel); position: sticky; top: 0; }
table.cal td.dest { background: var(--panel); font-weight: 600; text-align: left; position: sticky; left: 0; z-index: 2; }
table.cal td.cell { background: var(--panel-2); }
table.cal td.cell.cheap { background: #0f3322; color: var(--good); font-weight: 600; }
table.cal td.cell.mid   { background: #2a2510; color: var(--accent); }
table.cal td.cell.dear  { background: #2a1414; color: #fda4af; }
table.cal td.cell.none  { color: var(--muted); }
table.cal td.cell { vertical-align: top; }
table.cal td.cell a { color: inherit; text-decoration: none; display: block; }
table.cal td.cell .cprice { display: block; font-weight: 700; }
table.cal td.cell .ctimes {
  display: block; margin-top: 2px;
  font-size: 10px; line-height: 1.3;
  color: var(--muted); font-variant-numeric: tabular-nums;
}
table.cal td.cell.pickable { cursor: pointer; }
table.cal td.cell.pickable:hover { filter: brightness(1.25); }
table.cal td.cell.sel {
  outline: 2px solid var(--accent-2); outline-offset: -2px;
  box-shadow: inset 0 0 0 9999px rgba(56, 189, 248, 0.16);
}
.cal-grid-title {
  margin: 14px 0 6px; font-size: 14px; color: var(--accent-2);
}
.cal-grid-title:first-child { margin-top: 0; }

/* Round-trip selection summary */
.rt-card {
  background: var(--panel); border: 1px solid var(--accent-2);
  border-radius: 12px; padding: 12px; margin-bottom: 12px;
}
.rt-leg { font-size: 13px; padding: 3px 0; }
.rt-total {
  margin-top: 8px; padding-top: 8px;
  border-top: 1px solid var(--border);
  font-size: 15px; color: var(--good);
}
.rt-total .deeplink { color: var(--accent-2); font-size: 13px; margin-left: 8px; }
.rt-warn { margin-top: 8px; color: var(--warn); font-size: 13px; }

/* Planner tab */
#pl-results { overflow-x: auto; }
.pl-summary-card {
  background: var(--panel); border: 1px solid var(--good);
  border-radius: 12px; padding: 12px; margin-bottom: 12px;
}
.pl-summary-card .winner { color: var(--good); font-weight: 700; font-size: 17px; }
.pl-summary-card .meta { color: var(--muted); font-size: 13px; margin-top: 4px; }
.pl-summary-card .meta .deeplink { color: var(--accent-2); margin-left: 8px; }
.pl-hide-toggle {
  display: flex; align-items: center; gap: 6px;
  margin-top: 10px; font-size: 12px; color: var(--muted);
  text-transform: none; letter-spacing: normal;
}
.pl-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.pl-table th, .pl-table td {
  border-bottom: 1px solid var(--border);
  padding: 6px 8px; text-align: left; white-space: nowrap;
}
.pl-table th {
  background: var(--panel); color: var(--muted);
  position: sticky; top: 0; font-size: 11px;
}
.pl-table tbody tr:hover { background: var(--panel-2); }
.pl-table tr.excluded { opacity: 0.4; }
.pl-table tr.excluded td:not(.pl-actions) { text-decoration: line-through; }
.pl-table tr.deal { background: rgba(74, 222, 128, 0.09); }
.pl-table tr.deal:hover { background: rgba(74, 222, 128, 0.16); }
.pl-table tr.deal .pl-total { color: var(--good); }
.pl-table .pl-rank { color: var(--muted); }
.pl-table .pl-nights { color: var(--muted); }
.pl-leg-route { color: var(--accent-2); font-weight: 700; }

/* Chain tab */
.ch-path { font-size: 17px; font-weight: 700; margin: 4px 0 2px; }
.ch-path .ch-city { color: var(--accent-2); }
.ch-path .ch-arrow { color: var(--muted); }
.card.ch-top { border-color: var(--good); }
.ch-itin-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.ch-itin-total { font-size: 20px; font-weight: 700; color: var(--accent); }
.ch-leg-line {
  display: flex; gap: 10px; align-items: baseline;
  padding: 4px 0; font-size: 13px;
}
.ch-leg-line .ch-leg-route { font-weight: 700; color: var(--accent-2); min-width: 84px; }
.ch-leg-line .ch-leg-price { color: var(--accent); font-weight: 700; margin-left: auto; }
.ch-layover {
  font-size: 12px; color: var(--muted);
  padding: 2px 0 2px 16px; border-left: 2px solid var(--border); margin-left: 6px;
}
.pl-table .pl-total { color: var(--accent); font-weight: 700; }
.pl-leg-price { color: var(--text); }
.pl-leg-deal { color: var(--good); font-weight: 700; }
.controls label.pl-opt {
  flex-direction: row; align-items: center; gap: 6px;
  text-transform: none; letter-spacing: normal;
  font-size: 13px; color: var(--text);
}
.controls label.pl-opt input { flex: 0 0 auto; }
.pl-table .pl-actions { display: flex; gap: 8px; align-items: center; }
.pl-table .pl-actions .deeplink { color: var(--accent-2); }
.pl-table .pl-totrip { min-width: auto; padding: 3px 8px; font-size: 11px; flex: 0 0 auto; }
.pl-table input[type="checkbox"] { transform: scale(1.15); }

/* Trip builder */
.leg {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; margin-bottom: 10px;
}
.leg h4 { margin: 0 0 8px; }
.leg .grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.leg .grid label { font-size: 11px; color: var(--muted); display: flex; flex-direction: column; gap: 2px; }
.leg input[type="number"], .leg input[type="date"], .leg input[type="text"], .leg select {
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px; font-size: 14px;
}
.leg .toggle { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text); }
.leg .totals { margin-top: 8px; font-size: 14px; color: var(--accent); }

#t-summary {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 12px; margin-top: 12px;
}
#t-summary .winner {
  color: var(--good); font-weight: 700; font-size: 18px;
}
#t-summary table { width: 100%; border-collapse: collapse; margin-top: 8px; }
#t-summary th, #t-summary td { padding: 6px 4px; border-bottom: 1px solid var(--border); font-size: 13px; text-align: right; }
#t-summary th:first-child, #t-summary td:first-child { text-align: left; }

/* Watch tab */
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 8px 0; }
details summary { padding: 6px 0; cursor: pointer; color: var(--accent-2); font-weight: 600; }
.wl-card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.wl-card h3 { margin: 0 0 4px; }
.wl-card .row { gap: 6px; }
.wl-card .deal { display: flex; justify-content: space-between; padding: 4px 0; border-bottom: 1px dashed var(--border); font-size: 13px; }
.wl-card .deal:last-child { border-bottom: none; }
.wl-card .deal .p { color: var(--accent); font-weight: 700; }
.alert-card { background: var(--panel-2); border-left: 4px solid var(--accent); border-radius: 6px; padding: 8px 12px; margin-bottom: 8px; font-size: 13px; }
.alert-card.threshold { border-left-color: var(--good); }
.alert-card.drop { border-left-color: var(--accent-2); }
.alert-card a { color: var(--accent-2); }

/* Optimize tab */
.leg-row {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 8px; align-items: center;
  padding: 6px 8px; font-size: 13px;
  border-bottom: 1px solid var(--border);
}
.leg-row input[type="checkbox"] { transform: scale(1.2); }
.leg-row .price { color: var(--accent); font-weight: 700; }
.leg-row .price.zero { color: var(--warn); font-weight: normal; }
.leg-row .badge { font-size: 10px; }

.rules-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.rules-table th, .rules-table td { border: 1px solid var(--border); padding: 4px 6px; text-align: left; }
.rules-table th { background: var(--panel-2); }
.rules-table input { width: 100%; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); padding: 3px; font-size: 12px; }

.itin-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px; margin-bottom: 8px;
}
.itin-card.top { border-color: var(--good); }
.itin-card .itin-head {
  display: flex; justify-content: space-between; gap: 8px; font-size: 14px; font-weight: 600;
}
.itin-card .itin-head .score { color: var(--accent); }
.itin-card .itin-head .cash { color: var(--muted); font-weight: normal; }
.itin-card .itin-meta { color: var(--muted); font-size: 12px; margin: 4px 0; }
.itin-card .itin-breakdown { font-size: 12px; color: var(--muted); }
.itin-card a.deeplink { color: var(--accent-2); font-size: 12px; margin-right: 12px; }