:root {
  --primary: #1d5b8a;
  --primary-dark: #163f5f;
  --accent: #f2a900;
  --bg: #f4f6f8;
  --card-bg: #ffffff;
  --border: #dfe4ea;
  --text: #1f2937;
  --text-muted: #6b7280;
  --danger: #c0392b;
  --success: #2e7d32;
  --warn: #b8860b;

  --sidebar-bg: #142433;
  --sidebar-hover: #1f3a52;
  --sidebar-border: #24425c;
  --sidebar-text: #cbd5e1;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Microsoft JhengHei", "PingFang TC", -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 210px;
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  padding: 0 0 20px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.sidebar .topbar { display: flex; align-items: center; justify-content: space-between; }
.sidebar .brand {
  padding: 22px 20px 18px;
  border-bottom: 1px solid var(--sidebar-border);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}
.sidebar .brand .brand-text { font-size: 14px; line-height: 1.5; color: #fff; letter-spacing: 0.5px; }
.sidebar .brand .brand-text .sub { color: var(--accent); font-size: 11px; display: block; }
.sidebar .links { display: flex; flex-direction: column; flex: 1; }
.sidebar .account-box { margin-top: auto; padding: 16px 20px; border-top: 1px solid var(--sidebar-border); }
.sidebar a {
  display: block;
  padding: 12px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar a:hover { background: var(--sidebar-hover); color: #fff; }
.sidebar a.active { background: var(--sidebar-hover); color: #fff; font-weight: bold; border-left-color: var(--accent); }

.content { flex: 1; padding: 28px 36px; max-width: 1200px; }

h1 { font-size: 22px; margin: 0 0 20px; }
h2 { font-size: 17px; margin: 24px 0 12px; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.stat-card .label { font-size: 13px; color: var(--text-muted); }
.stat-card .value { font-size: 26px; font-weight: bold; margin-top: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { background: #eef2f6; color: var(--text-muted); font-weight: 600; }
tr:hover td { background: #eef2f6; }
table.compact th, table.compact td { padding: 6px 8px; }

.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #6b7280; }
.btn.danger { background: var(--danger); }
.btn.small { padding: 4px 10px; font-size: 12px; }
.btn.outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn.block { display: block; width: 100%; text-align: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 10px; flex-wrap: wrap; }

form.inline { display: inline; }

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 20px; }
.form-grid.single { grid-template-columns: 1fr; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 13px; color: var(--text-muted); }
.field input, .field select, .field textarea {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.actions-row { margin-top: 18px; display: flex; gap: 10px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge.pending { background: #f3e3c4; color: var(--warn); }
.badge.signed { background: #dcedc8; color: var(--success); }
.badge.void { background: #efe9dc; color: var(--text-muted); }
.badge.active { background: #dbe9f5; color: var(--primary-dark); }
.badge.completed { background: #dcedc8; color: var(--success); }
.badge.closed { background: #efe9dc; color: var(--text-muted); }
.badge.revoked { background: #f2dad1; color: var(--danger); }

.flash { background: #dbe9f5; color: var(--primary-dark); padding: 10px 16px; border-radius: 6px; margin-bottom: 16px; }
.error-box { background: #f9dcd6; color: var(--danger); padding: 10px 16px; border-radius: 6px; margin-bottom: 16px; }
.help-text { color: var(--text-muted); font-size: 13px; margin-top: 4px; }
.muted { color: var(--text-muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }

a.link { color: var(--primary); text-decoration: none; }
a.link:hover { text-decoration: underline; }

.copy-group { display: flex; gap: 8px; }
.copy-group input { flex: 1; }

.qr-box { display: inline-block; background: #fff; padding: 10px; border: 1px solid var(--border); border-radius: 8px; }
.qr-box img { display: block; width: 180px; height: 180px; }

/* ---- 手機版排版 ---- */
.menu-toggle { display: none; }

@media (max-width: 768px) {
  .app-shell { flex-direction: column; }

  .sidebar {
    width: 100%;
    height: auto;
    position: sticky;
    top: 0;
    z-index: 20;
  }
  .sidebar .brand {
    border-bottom: none;
    margin-bottom: 0;
    padding: 12px 16px;
  }
  .menu-toggle {
    display: block;
    background: none;
    border: none;
    color: #fff;
    font-size: 22px;
    padding: 12px 16px;
    cursor: pointer;
  }
  .sidebar .links {
    display: none;
    border-top: 1px solid var(--sidebar-border);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  .sidebar.open .links { display: flex; }
  .sidebar a { padding: 14px 20px; }
  .sidebar .account-box { margin-top: 0; }

  .content { padding: 16px; }
  h1 { font-size: 19px; }

  .form-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }

  table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  table th, table td { white-space: nowrap; }

  .toolbar { flex-direction: column; align-items: stretch; }
  .actions-row { flex-wrap: wrap; }
  .actions-row .btn, .actions-row form { flex: 1 1 auto; }
}