:root {
  --bg: #ffffff;
  --panel: #f8fafc;
  --line: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --accent-soft: #eef2ff;
  --danger: #dc2626;
  --radius: 8px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --panel: #1e293b;
    --line: #334155;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --accent: #6366f1;
    --accent-soft: #1e1b4b;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font: 13px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button {
  font: inherit;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}
button.primary:hover:not(:disabled) { filter: brightness(1.1); }

button.link {
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  text-decoration: underline;
}

textarea, input {
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 8px;
  width: 100%;
}
textarea:focus, input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
textarea { resize: vertical; }

.tags { display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.chip {
  display: inline-flex;
  align-items: center;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: 12px;
}
.chip button {
  border: none;
  background: none;
  color: inherit;
  padding: 1px 4px 1px 9px;
}
.chip button.chip-x { padding: 1px 8px 1px 2px; opacity: 0.7; }
.chip button.chip-x:hover { opacity: 1; }
.tag-input {
  border: 1px dashed var(--line);
  border-radius: 999px;
  padding: 1px 9px;
  width: 80px;
  font-size: 12px;
}
.chip-static {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 1px 9px;
  font-size: 12px;
}

.toast {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  background: #111827;
  color: #fff;
  padding: 8px 12px;
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}
.toast.error { background: var(--danger); }