:root {
  --bg: #f6f3ee;
  --surface: #ffffff;
  --ink: #221f1a;
  --ink-muted: #645e53;
  --border: #e3ddd0;
  --accent: #3c6a5a;
  --accent-strong: #284a3e;
  --danger: #9c4b3f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Noto Sans TC", sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { color: var(--accent-strong); }

.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { font-weight: 700; color: var(--ink); text-decoration: none; margin-right: 8px; }
.topnav { display: flex; gap: 14px; flex-wrap: wrap; flex: 1; }
.topnav a { text-decoration: none; color: var(--ink-muted); font-size: 14px; }
.topnav a:hover { color: var(--accent-strong); }
.logout-form { display: flex; align-items: center; gap: 8px; }
.whoami { font-size: 13px; color: var(--ink-muted); }
.logout-form button { background: none; border: 1px solid var(--border); border-radius: 6px; padding: 6px 12px; cursor: pointer; }

.page { max-width: 960px; margin: 0 auto; padding: 24px 16px 60px; }

.login-box { max-width: 360px; margin: 80px auto; background: var(--surface); padding: 32px; border-radius: 12px; border: 1px solid var(--border); }
.login-box h1 { font-size: 18px; text-align: center; margin-bottom: 20px; }
.login-box form { display: flex; flex-direction: column; gap: 14px; }
.login-box label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.login-box input { padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; }
.login-box button { margin-top: 8px; padding: 10px; background: var(--accent); color: white; border: none; border-radius: 6px; font-size: 15px; cursor: pointer; }
.error { color: var(--danger); font-size: 14px; }

.list-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.list-head-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn { background: var(--accent); color: white; text-decoration: none; padding: 8px 14px; border-radius: 6px; font-size: 14px; }
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; min-width: 480px; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--ink-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.row-actions { display: flex; gap: 10px; }
.row-actions form { display: inline; }
.link-danger { background: none; border: none; color: var(--danger); cursor: pointer; padding: 0; font-size: 14px; }
.empty { color: var(--ink-muted); text-align: center; }

.form-page { max-width: 560px; }
.form-page form { display: flex; flex-direction: column; gap: 14px; background: var(--surface); padding: 20px; border-radius: 10px; border: 1px solid var(--border); }
.field label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.field input[type=text], .field input[type=number], .field input[type=date], .field input[type=datetime-local], .field textarea, .field select {
  padding: 9px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; font-family: inherit;
}
.field input[type=checkbox] { width: 18px; height: 18px; margin-left: 8px; }
.req { color: var(--danger); }
.form-actions { display: flex; gap: 12px; margin-top: 8px; }
.form-actions button { background: var(--accent); color: white; border: none; padding: 10px 20px; border-radius: 6px; cursor: pointer; font-size: 14px; }
.btn-secondary { padding: 10px 20px; border: 1px solid var(--border); border-radius: 6px; text-decoration: none; color: var(--ink-muted); font-size: 14px; }
.error-list { color: var(--danger); font-size: 14px; }

.dashboard .cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; margin-top: 20px; }
.card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 20px; text-decoration: none; color: var(--ink); font-size: 14px; }
.card:hover { border-color: var(--accent); }
.muted { color: var(--ink-muted); font-size: 14px; }

@media (max-width: 500px) {
  .page { padding: 16px 12px 40px; }
}