:root {
  --bg:#f7f8fb;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:#e5e7eb;
  --accent:#2563eb;
  --accent-contrast:#ffffff;
  --warn-bg:#fff7ed;
  --warn-text:#9a3412;
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,PingFang SC,Helvetica Neue,Noto Sans SC,Arial,sans-serif}
.container{max-width:1100px;margin:0 auto;padding:24px}
.card{background:var(--card);padding:16px 18px;border-radius:var(--radius);border:1px solid var(--border);box-shadow:0 1px 2px rgba(0,0,0,.04);margin:12px 0}
.card.warn{background:var(--warn-bg);color:var(--warn-text);border-color:#fed7aa}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.toolbar{display:flex;gap:12px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.toolbar .controls{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.hidden{display:none}
.muted{color:var(--muted)}
#resetNote{font-size:12px}
input,select,button{height:40px;padding:0 12px;border-radius:10px;border:1px solid var(--border);background:#fff;color:var(--text);font-size:14px}
input[type="datetime-local"]{height:40px}
button{background:var(--accent);border:none;color:var(--accent-contrast);cursor:pointer}
button.secondary{background:#e5e7eb;color:#111827}
button:disabled{opacity:.6;cursor:not-allowed}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px 8px;border-bottom:1px solid var(--border);text-align:left}
thead th{position:sticky;top:0;background:var(--card)}
h1{font-size:28px;margin:8px 0 16px}
.plan-filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.plan-filters button{height:auto;padding:4px 12px;border-radius:999px;background:#f3f4f6;color:var(--text);border:1px solid var(--border);font-size:13px;line-height:1.4}
.plan-filters button.active{background:var(--accent);border-color:var(--accent);color:var(--accent-contrast)}
button.small{height:28px;padding:0 10px;font-size:12px}
.plan-list{margin-top:12px}
.plan-list table{margin-top:6px}
.plan-list button.small{height:26px;padding:0 8px;font-size:12px}
.plan-list .plan-actions{display:flex;gap:6px;}
.plan-list tr.selected{background:#eef2ff;}