:root {
  --bg: #f2f8fd;
  --surface: #ffffff;
  --text: #2e3a45;
  --muted: #718390;
  --border: #dce8ef;
  --primary: #367fae;
  --primary-soft: #e1f0fb;
  --danger: #b42318;
  --danger-soft: #fee4e2;
  --success: #287a63;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 1.2em; }
.panel { max-width: 420px; margin: 4rem auto; padding: 2rem; background: var(--surface); border-radius: 10px; }
.login-panel label { display: block; margin: 1rem 0 0.35rem; font-size: 14px; }
.login-panel input {
  width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
}
button {
  min-height: 44px; border: none; border-radius: 8px; padding: 10px 16px; cursor: pointer; font-size: 14px;
}
button:disabled { cursor: wait; opacity: 0.62; }
button.primary { background: var(--primary); color: var(--surface); width: 100%; margin-top: 1rem; }
button.ghost { background: var(--border); color: var(--text); }
button.danger { background: var(--danger-soft); color: var(--danger); }
button.small { padding: 6px 10px; font-size: 12px; }
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 12px 20px;
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.topbar nav { flex: 1; display: flex; gap: 8px; overflow-x: auto; }
.tab { background: transparent; }
.tab.active { background: var(--primary-soft); color: var(--primary); }
main { padding: 20px; max-width: 960px; margin: 0 auto; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
.stat-card {
  background: var(--surface); border-radius: 10px; padding: 16px;
}
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-card .label { font-size: 13px; color: var(--muted); margin-top: 4px; }
.toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.list { display: flex; flex-direction: column; gap: 10px; }
.card {
  background: var(--surface); border-radius: 10px; padding: 14px 16px;
  display: flex; gap: 12px; align-items: flex-start; justify-content: space-between;
}
.card-main { flex: 1; }
.card-title { font-weight: 600; margin-bottom: 6px; }
.card-meta { font-size: 12px; color: var(--muted); line-height: 1.5; }
.card-actions { display: flex; flex-direction: column; gap: 6px; align-items: flex-end; }
.badge {
  display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 6px;
}
.badge.pending { background: #f0f3f6; color: var(--muted); }
.badge.in_progress { background: var(--primary-soft); color: var(--primary); }
.badge.done { background: #e8f8f4; color: var(--success); }
select { min-height: 44px; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); }

@media (max-width: 640px) {
  .panel { max-width: none; margin: 0; min-height: 100vh; border-radius: 0; padding: 24px 20px; }
  .topbar { align-items: stretch; flex-wrap: wrap; padding: 10px 12px; }
  .topbar strong { width: 100%; }
  .topbar nav { order: 3; width: 100%; }
  main { padding: 14px 12px; }
  .card { flex-direction: column; }
  .card-actions { width: 100%; align-items: stretch; }
  .toolbar { justify-content: space-between; }
}