:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1b1f24;
  --sub: #5f6b7a;
  --line: #d9dee5;
  --accent: #1f3a5f;
  --accent-text: #ffffff;
  --chip: #eef1f5;
  --danger: #c62828;
  --overdue: #c62828;
  --overdue-bg: #fdecec;
  --pin: #b7791f;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121417;
    --panel: #1c2026;
    --text: #e8ebef;
    --sub: #9aa5b3;
    --line: #2e343c;
    --accent: #7fa7d9;
    --accent-text: #0e1a2a;
    --chip: #262c34;
    --danger: #ef6b6b;
    --overdue: #ff8a8a;
    --overdue-bg: #3a1f22;
    --pin: #e0b15a;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  -webkit-text-size-adjust: 100%;
}
button, input, select, textarea { font: inherit; color: inherit; }

.top {
  position: sticky; top: 0; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; background: var(--accent); color: var(--accent-text);
}
.top h1 { font-size: 18px; margin: 0; }
.top .ghost { color: var(--accent-text); border-color: transparent; }

main { padding: 12px 16px 40px; max-width: 720px; margin: 0 auto; }

.capture, .sheet {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 12px;
  display: flex; flex-direction: column; gap: 10px;
}
input[type=text], input[type=search], textarea, select, input[type=date] {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg);
  font-size: 16px; /* iPhone で入力時に拡大されないよう16px以上 */
}
textarea { resize: vertical; min-height: 96px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--line); background: var(--chip); border-radius: 999px; padding: 6px 12px; min-height: 36px;
}
.chip[aria-checked=true] { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }

.row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.row .primary { margin-left: auto; }
.due { display: flex; align-items: center; gap: 6px; color: var(--sub); }
.due input { width: auto; }
.pin { display: flex; align-items: center; gap: 6px; color: var(--sub); }

button { border: 1px solid var(--line); background: var(--panel); border-radius: 10px; padding: 8px 14px; min-height: 40px; cursor: pointer; }
.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
.danger { color: var(--danger); border-color: var(--danger); }
.ghost { background: transparent; }

.msg { margin: 0; min-height: 1.2em; color: var(--sub); font-size: 14px; }

.filters { display: flex; gap: 8px; margin: 14px 0 8px; }
.filters select { width: 9em; flex: none; }

.tabs { display: flex; overflow-x: auto; scrollbar-width: none; border-bottom: 1px solid var(--line); margin-bottom: 8px; }
.tabs::-webkit-scrollbar { display: none; }
.tab { flex: 1 1 auto; border: none; border-bottom: 3px solid transparent; border-radius: 0; background: none; padding: 8px 2px; font-size: 14px; white-space: nowrap; color: var(--sub); }
.tab[aria-selected=true] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.tab .count { font-size: 12px; margin-left: 2px; }

.list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; cursor: pointer;
}
.card.overdue { border-color: var(--overdue); background: var(--overdue-bg); }
.card .head { display: flex; gap: 6px; align-items: baseline; }
.card .title { font-weight: 600; flex: 1; word-break: break-word; }
.card .pinmark { color: var(--pin); }
.card .snippet { color: var(--sub); font-size: 14px; margin-top: 2px; white-space: pre-wrap; word-break: break-word;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card .tags { display: flex; gap: 6px; margin-top: 6px; font-size: 12px; color: var(--sub); flex-wrap: wrap; }
.tag { background: var(--chip); border-radius: 999px; padding: 1px 8px; }
.tag.late { color: var(--overdue); font-weight: 600; }
.empty { color: var(--sub); text-align: center; margin-top: 24px; }

dialog { border: none; padding: 0; background: transparent; width: min(720px, 100vw); max-height: 92vh; color: var(--text); }
dialog::backdrop { background: rgba(0,0,0,.45); }
dialog .sheet { max-height: 92vh; overflow-y: auto; }
dialog h2 { font-size: 18px; margin: 0; }
dialog h3 { font-size: 15px; margin: 8px 0 0; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.meta { color: var(--sub); font-size: 13px; margin: 0; }
.note { font-size: 14px; margin: 0; }
.preview { background: var(--chip); border-radius: 10px; padding: 10px; font-size: 14px; display: flex; flex-direction: column; gap: 8px; }
.snapshots { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.snapshots li { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.snapshots li span { flex: 1; }