:root {
  --bg: #eef2f6;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #dbe2ea;
  --primary: #0f6a56;
  --primary-2: #14967a;
  --danger: #b42318;
  --ok: #067647;
  --warn: #b54708;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Noto Sans TC", sans-serif;
  background: linear-gradient(180deg, #e8eef5 0%, var(--bg) 40%, #e7ece8 100%);
  color: var(--text);
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between;
  padding: 14px 20px; background: #0b3d33; color: #fff;
}
.topbar .brand { font-weight: 700; font-size: 1.15rem; letter-spacing: .02em; }
.topbar nav { display: flex; flex-wrap: wrap; gap: 14px; }
.topbar a { color: #d9f5ee; }

.container { max-width: 980px; margin: 24px auto; padding: 0 16px 40px; }
.footer { text-align: center; color: var(--muted); padding: 24px; font-size: .85rem; }

.card, .auth-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 24px rgba(15, 40, 60, .06);
}
.auth-body { display: grid; place-items: center; padding: 24px; }
.auth-card { width: min(480px, 100%); }

h1,h2,h3 { margin: 0 0 12px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 16px 0; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.stat .n { font-size: 1.8rem; font-weight: 700; color: var(--primary); }

.form label { display: block; margin: 10px 0; font-size: .95rem; }
.form input, .form select, .form textarea {
  display: block; width: 100%; margin-top: 6px;
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font: inherit;
}
.btn {
  display: inline-block; border: 0; border-radius: 10px; padding: 10px 16px;
  background: #e5e7eb; color: #111; cursor: pointer; font: inherit;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.danger { background: var(--danger); color: #fff; }
.btn + .btn { margin-left: 8px; }

.alert { padding: 12px 14px; border-radius: 10px; margin: 12px 0; }
.alert.error, .alert.danger { background: #fef3f2; color: var(--danger); }
.alert.ok, .alert.success { background: #ecfdf3; color: var(--ok); }
.alert.warn { background: #fffaeb; color: var(--warn); }

table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 12px; overflow: hidden; }
th, td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: .92rem; }
th { background: #f3f6f9; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .78rem; background: #eef2ff; }
.badge.pending { background: #fffaeb; color: var(--warn); }
.badge.claimed { background: #eff8ff; color: #175cd3; }
.badge.done { background: #ecfdf3; color: var(--ok); }
.badge.failed { background: #fef3f2; color: var(--danger); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 700px) { .grid-2 { grid-template-columns: 1fr; } }