:root {
  --bg: #f6f4ef;
  --card: #ffffff;
  --ink: #1b2430;
  --muted: #667085;
  --line: #e4e0d6;
  --accent: #2f6f8f;
  --p0: #1f8a8a;       /* first person  */
  --p1: #c4632f;       /* second person */
  --info: #2f6f8f;
  --warning: #b7791f;
  --urgent: #c2410c;
  --critical: #b42318;
  --ok: #2e7d4f;
  --radius: 14px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1720;
    --card: #17212c;
    --ink: #e6e9ee;
    --muted: #93a0b2;
    --line: #263241;
    --accent: #6fb3d2;
    --p0: #4fc1c1;
    --p1: #f0915a;
    --info: #6fb3d2;
    --warning: #e0a43a;
    --urgent: #f07a3a;
    --critical: #ff5a4f;
    --ok: #5bc48a;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
body { padding-bottom: calc(72px + env(safe-area-inset-bottom)); }
button, input, select, textarea { font: inherit; color: inherit; }

.top { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 10px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px; background: var(--bg);
  border-bottom: 1px solid var(--line); }
.top h1 { font-size: 18px; margin: 0; flex: 1; letter-spacing: .2px; }
.offline { font-size: 12px; color: var(--warning); border: 1px solid var(--warning);
  border-radius: 99px; padding: 1px 8px; }
.icon-btn { background: none; border: 0; color: var(--muted); padding: 6px; border-radius: 8px; }

main { padding: 12px 14px 96px; max-width: 720px; margin: 0 auto; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: .6px; color: var(--muted);
  margin: 22px 4px 8px; font-weight: 600; }
h2:first-child { margin-top: 6px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px 14px; margin-bottom: 10px; }
.card.tap { cursor: pointer; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.row { display: flex; align-items: center; gap: 10px; }
.row.between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.mono { font-family: ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace; letter-spacing: .5px; }

/* alerts */
.alert { border-left: 5px solid var(--info); }
.alert.warning { border-left-color: var(--warning); }
.alert.urgent { border-left-color: var(--urgent); }
.alert.critical { border-left-color: var(--critical);
  background: color-mix(in srgb, var(--critical) 9%, var(--card)); }
.alert .title { font-weight: 650; }
.alert .lvl { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .6px; }
.alert.info .lvl { color: var(--info); }
.alert.warning .lvl { color: var(--warning); }
.alert.urgent .lvl { color: var(--urgent); }
.alert.critical .lvl { color: var(--critical); }
.alert .body { margin: 4px 0 8px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }

.btn { border: 1px solid var(--line); background: var(--card); border-radius: 10px;
  padding: 7px 12px; cursor: pointer; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #0f1720; } }
.btn.danger { color: var(--critical); border-color: color-mix(in srgb, var(--critical) 45%, var(--line)); }
.btn.ghost { border-color: transparent; color: var(--muted); }
.btn.sel { outline: 2px solid var(--accent); }

/* where-are-we */
.where .person { display: flex; gap: 10px; align-items: baseline; padding: 4px 0; }
.dot { width: 10px; height: 10px; border-radius: 50%; flex: none; transform: translateY(1px); }
.p0 { color: var(--p0); } .p1 { color: var(--p1); }
.bg-p0 { background: var(--p0); } .bg-p1 { background: var(--p1); }
.where .place { font-weight: 650; }
.together { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--line); }

/* trips */
.leg { display: grid; grid-template-columns: 56px 1fr; gap: 10px; }
.leg .date { text-align: center; line-height: 1.15; }
.leg .date .dnum { font-size: 22px; font-weight: 700; }
.leg .date .dmon { font-size: 12px; text-transform: uppercase; color: var(--muted); }
.leg .date .dwk { font-size: 12px; color: var(--muted); }
.route { font-weight: 650; font-size: 16px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chip { font-size: 12px; border: 1px solid var(--line); border-radius: 99px; padding: 1px 8px;
  white-space: nowrap; }
.chip.person.p0 { border-color: var(--p0); }
.chip.person.p1 { border-color: var(--p1); }
.chip.cancelled { text-decoration: line-through; opacity: .6; }
.chip.flown { color: var(--ok); border-color: var(--ok); }
.chip.alt { color: var(--warning); border-color: var(--warning); }
.chip.alt.crit { color: var(--critical); border-color: var(--critical); }
.chip.verify { color: var(--warning); border-color: var(--warning); }
.leg.is-cancelled .route { text-decoration: line-through; opacity: .6; }
.copy { cursor: pointer; border-bottom: 1px dotted var(--muted); }

/* credits */
.totals { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.total { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 8px 12px; }
.total .amt { font-size: 20px; font-weight: 700; }
.amount { font-size: 20px; font-weight: 700; }
.exp.soon { color: var(--urgent); font-weight: 600; }
.exp.mid { color: var(--warning); }
.uses { margin: 6px 0 0; padding-left: 18px; }
details summary { cursor: pointer; color: var(--muted); margin: 14px 4px; }

/* tabs + fab */
.tabs { position: fixed; bottom: 0; left: 0; right: 0; z-index: 6; display: flex;
  background: var(--card); border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom); }
.tabs button { flex: 1; background: none; border: 0; padding: 14px 0 12px; color: var(--muted);
  font-weight: 600; }
.tabs button.active { color: var(--accent); box-shadow: inset 0 3px 0 var(--accent); }
.fab { position: fixed; right: 18px; bottom: calc(84px + env(safe-area-inset-bottom)); z-index: 6;
  width: 54px; height: 54px; border-radius: 50%; border: 0; background: var(--accent); color: #fff;
  font-size: 30px; line-height: 1; box-shadow: 0 6px 18px rgba(0,0,0,.25); cursor: pointer; }
@media (prefers-color-scheme: dark) { .fab { color: #0f1720; } }

/* sheet */
dialog { border: 1px solid var(--line); border-radius: 18px 18px 0 0; padding: 0; width: 100%;
  max-width: 720px; margin: auto auto 0; max-height: 92vh; background: var(--card); color: var(--ink); }
dialog::backdrop { background: rgba(0,0,0,.45); }
#sheet-body { padding: 16px 16px calc(18px + env(safe-area-inset-bottom)); overflow-y: auto; max-height: 92vh; }
.sheet-title { font-size: 17px; font-weight: 700; margin: 0 0 10px; }
.field { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
.field label { font-size: 12px; color: var(--muted); font-weight: 600; }
.field input, .field select, .field textarea { border: 1px solid var(--line); border-radius: 10px;
  padding: 9px 10px; background: var(--bg); width: 100%; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.checks { display: flex; gap: 14px; padding: 6px 0; }
.kv { display: grid; grid-template-columns: 110px 1fr; gap: 4px 10px; margin: 8px 0 12px; }
.kv .k { color: var(--muted); font-size: 13px; }
.trav { border-top: 1px solid var(--line); padding: 10px 0; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.seg button { border: 0; background: none; padding: 6px 10px; cursor: pointer; }
.seg button.on { background: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .seg button.on { color: #0f1720; } }

.toast { position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(90px + env(safe-area-inset-bottom)); background: var(--ink); color: var(--bg);
  padding: 8px 14px; border-radius: 10px; z-index: 20; font-size: 14px; }
.empty { text-align: center; color: var(--muted); padding: 30px 0; }

.mt { margin-top: 12px; }
.crit-text { color: var(--critical); }
.login { max-width: 420px; margin: 40px auto; }
body.logged-out .tabs, body.logged-out .fab { display: none; }