:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --border: #dfe3e8;
  --text: #1a1d21;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #e8effc;
  --danger: #c0392b;
  --ok: #15803d;
  --warn: #b45309;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --card: #171b21;
    --border: #2a3038;
    --text: #e6e9ee;
    --muted: #93a0b0;
    --accent: #5b9bff;
    --accent-soft: #1c2a41;
    --danger: #ff7a6b;
    --ok: #56d47f;
    --warn: #e0a952;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom, 0px));
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; text-decoration: none; color: var(--text); }
header nav { display: flex; gap: 14px; }
header nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
header nav a:hover { color: var(--accent); }

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 16px 16px 96px;
}

h1 { font-size: 22px; margin: 4px 0 16px; }
h2 { font-size: 17px; margin: 0; }

.row { display: flex; align-items: center; gap: 10px; }
.between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.muted { color: var(--muted); font-size: 13px; }
.stack > * + * { margin-top: 12px; }
.right { margin-left: auto; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}

a.card { display: block; text-decoration: none; color: inherit; }
a.card:hover { border-color: var(--accent); }

button, .btn {
  font: inherit;
  padding: 9px 14px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:hover, .btn:hover { border-color: var(--accent); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { filter: brightness(1.08); }
.btn-danger { color: var(--danger); }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn-icon {
  padding: 4px 8px;
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 15px;
  line-height: 1;
}
.btn-icon:hover { color: var(--danger); }

input[type="text"], input[type="date"], textarea, select {
  font: inherit;
  width: 100%;
  padding: 10px 12px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
label.field { display: block; }
label.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }

/* Trip type picker */
.types { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.type {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  cursor: pointer;
}
.type:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.type input { width: 20px; height: 20px; margin: 1px 0 0; accent-color: var(--accent); flex: none; }
.type.locked { opacity: 0.75; cursor: default; }
.type b { font-weight: 600; }

/* Progress */
.bar { height: 8px; border-radius: 99px; background: var(--border); overflow: hidden; }
.bar > div { height: 100%; background: var(--accent); transition: width 0.2s; }
.bar.done > div { background: var(--ok); }

/* Checklist */
.group { margin-top: 18px; }
.group > h2 { padding: 0 2px 6px; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; }
.items { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--card); }
.item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  user-select: none;
}
.item:last-child { border-bottom: 0; }
.item input { width: 22px; height: 22px; flex: none; accent-color: var(--accent); }
.item.checked .label { text-decoration: line-through; color: var(--muted); }
.item .label { line-height: 1.3; }
.item .note { display: block; font-size: 12px; color: var(--warn); }
.item.important .label { font-weight: 600; }
.item .btn-icon { opacity: 0; }
.item:hover .btn-icon, .touch .item .btn-icon { opacity: 1; }

.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pill {
  font-size: 12px;
  padding: 2px 9px;
  border-radius: 99px;
  background: var(--accent-soft);
  color: var(--accent);
  white-space: nowrap;
}

.empty { text-align: center; color: var(--muted); padding: 40px 16px; }

.sticky-actions {
  position: sticky;
  bottom: 0;
  padding: 12px 0 calc(12px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(to top, var(--bg) 70%, transparent);
}

details.tmpl > summary {
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 600;
  list-style: none;
}
details.tmpl > summary::-webkit-details-marker { display: none; }
details.tmpl > summary::before { content: "▸ "; color: var(--muted); }
details.tmpl[open] > summary::before { content: "▾ "; }
details.tmpl { padding: 0; }
details.tmpl .items { border: 0; border-top: 1px solid var(--border); border-radius: 0; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 9px 16px;
  border-radius: 99px;
  font-size: 14px;
  z-index: 50;
}