/* Fuel Log — mobile first, high contrast for cockpit use. */
:root {
  --bg: #f3f5f8;
  --surface: #ffffff;
  --text: #0e1726;
  --muted: #5b6678;
  --border: #d6dbe3;
  --primary: #0b5cd5;
  --primary-text: #ffffff;
  --ok: #0f7a3d;
  --ok-bg: #e2f5ea;
  --warn: #8a5a00;
  --warn-bg: #fff3d6;
  --err: #b42318;
  --err-bg: #fde8e6;
  --arrival: #5b3cc4;
  --arrival-text: #ffffff;
  --arrival-bg: #ece6fb;
  --radius: 14px;
  --tap: 52px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #131c2e;
    --text: #eef2f8;
    --muted: #9aa6ba;
    --border: #26324a;
    --primary: #3d8bff;
    --ok: #4ade80;
    --ok-bg: #0f2a1b;
    --warn: #fbbf24;
    --warn-bg: #2d2309;
    --err: #ff8a80;
    --err-bg: #2f1414;
    --arrival: #8b6cff;
    --arrival-bg: #221a3d;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--primary); }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; }
h2 { font-size: 1.15rem; margin: 0 0 .5rem; }
.small { font-size: .85rem; }
.muted { color: var(--muted); }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
  padding: .75rem 1rem; padding-top: max(.75rem, env(safe-area-inset-top));
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; color: var(--text); text-decoration: none; font-size: 1.1rem; }
.clock { font-variant-numeric: tabular-nums; font-weight: 600; color: var(--muted); }

.container { padding: 1rem; max-width: 640px; margin: 0 auto; }
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1rem; margin-bottom: 1rem;
}

/* Buttons */
.btn {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: var(--tap); width: 100%; padding: .75rem 1rem;
  border: 0; border-radius: var(--radius);
  font: inherit; font-weight: 700; text-decoration: none; text-align: center;
  cursor: pointer;
}
.btn small { font-weight: 400; font-size: .85rem; opacity: .85; }
.btn-primary { background: var(--primary); color: var(--primary-text); }
.btn-primary:active { filter: brightness(.9); }
.btn-big { min-height: 72px; font-size: 1.2rem; }
.btn-arrival { background: var(--arrival); color: var(--arrival-text); }
.btn-arrival:active { filter: brightness(.9); }
.btn-disabled { background: var(--border); color: var(--muted); cursor: not-allowed; }
.event-buttons { display: grid; gap: .75rem; }
@media (min-width: 480px) { .event-buttons { grid-template-columns: 1fr 1fr; } }
button[disabled], input[disabled] + * { opacity: .6; }

/* Steps */
.step h2 { display: flex; align-items: center; gap: .5rem; }
.step-num {
  display: inline-grid; place-items: center; width: 1.8rem; height: 1.8rem;
  border-radius: 50%; background: var(--primary); color: var(--primary-text); font-size: .95rem;
}
.reading { margin-top: .75rem; }
.thumb { width: 100%; max-height: 220px; object-fit: cover; border-radius: 10px; border: 1px solid var(--border); }
.fields { display: grid; gap: .75rem; grid-template-columns: 1fr 1fr; margin-top: .5rem; }
.fields label { font-size: .9rem; font-weight: 600; color: var(--muted); }
.unit { font-weight: 400; }
.fields input {
  display: block; width: 100%; margin-top: .25rem; min-height: var(--tap);
  padding: .5rem .75rem; font: inherit; font-size: 1.5rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--text); background: var(--bg);
  border: 2px solid var(--border); border-radius: 10px;
}
.fields input:focus { outline: none; border-color: var(--primary); }

/* Status */
.chip { display: inline-block; padding: .35rem .75rem; border-radius: 999px; font-size: .9rem; font-weight: 600; margin: 0 0 1rem; }
.chip-ok { background: var(--ok-bg); color: var(--ok); }
.chip-wait { background: var(--warn-bg); color: var(--warn); }
.chip-bad { background: var(--err-bg); color: var(--err); }
.flash { padding: .6rem .8rem; border-radius: 10px; margin: .5rem 0; }
.flash.ok { background: var(--ok-bg); color: var(--ok); }
.flash.warn { background: var(--warn-bg); color: var(--warn); }
.flash.err { background: var(--err-bg); color: var(--err); }
.confidence { margin: .5rem 0; font-size: .95rem; }
.conf-high { color: var(--ok); }
.conf-medium, .conf-low { color: var(--warn); }
.spinner { margin: .75rem 0 0; color: var(--muted); }
.htmx-indicator { display: none; }
.htmx-request.htmx-indicator, .htmx-request .htmx-indicator { display: block; }

/* Event list */
.events { list-style: none; margin: 0; padding: 0; }
.event { padding: .75rem 0; border-top: 1px solid var(--border); }
.event:first-child { border-top: 0; }
.event-head { display: flex; gap: .5rem; align-items: center; font-variant-numeric: tabular-nums; }
.tag { text-transform: uppercase; font-size: .75rem; font-weight: 700; padding: .15rem .5rem; border-radius: 6px; background: var(--border); }
.tag-departure { background: var(--ok-bg); color: var(--ok); }
.tag-arrival { background: var(--arrival-bg); color: var(--arrival); }
.values { display: grid; grid-template-columns: repeat(2, 1fr); gap: .25rem .75rem; margin: .5rem 0; }
@media (min-width: 480px) { .values { grid-template-columns: repeat(4, 1fr); } }
.values dt { font-size: .8rem; color: var(--muted); }
.values dd { margin: 0; font-weight: 700; font-variant-numeric: tabular-nums; }
.event-foot { color: var(--muted); }

/* Arrival: since-departure summary */
#trip-summary .values dd + dd { font-weight: 400; }
#trip-summary .neg { color: var(--warn); }