:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1d2129;
  --muted: #6b7280;
  --line: #e4e7ec;
  --accent: #3b5bdb;
  --accent-weak: #edf2ff;
  --danger: #e03131;
  --ok: #2f9e44;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 16px rgba(16, 24, 40, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --panel: #1a1d23;
    --text: #e6e8ec;
    --muted: #9aa1ad;
    --line: #2b3039;
    --accent: #748ffc;
    --accent-weak: #232a40;
    --danger: #ff6b6b;
    --ok: #51cf66;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", Meiryo, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
h1, h2, h3 { margin: 0; line-height: 1.3; }
button, input, select, textarea { font: inherit; color: inherit; }
input, select, textarea {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  width: 100%;
  min-width: 0;
}
input[type=checkbox], input[type=radio] { width: auto; accent-color: var(--accent); }
input[type=color] { padding: 2px; height: 34px; width: 44px; }
textarea { resize: vertical; min-height: 70px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  padding: 7px 14px;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  color: var(--text);
}
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.btn.small { padding: 3px 9px; font-size: 12.5px; }
.btn:disabled { opacity: .5; cursor: default; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.chip {
  display: inline-flex; align-items: center; gap: 4px;
  border-radius: 999px; padding: 1px 9px; font-size: 12px;
  border: 1px solid var(--line); background: var(--panel);
  cursor: default; user-select: none;
}
.chip .dot, .dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; flex: none; }
.chip.selectable { cursor: pointer; }
.chip.on { background: var(--accent-weak); border-color: var(--accent); }
.field { display: grid; gap: 4px; margin-bottom: 12px; }
.field > span { font-size: 12.5px; color: var(--muted); }
.row { display: flex; gap: 10px; align-items: center; }
.row > * { flex: 1; }
.row > .none { flex: none; }
.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  background: #1d2129; color: #fff; padding: 10px 18px; border-radius: 10px; z-index: 1000;
  box-shadow: var(--shadow); max-width: calc(100% - 32px);
}
.toast.error { background: var(--danger); }