:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --danger-bg: #fee2e2;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --border: #e2e8f0;
  --text: #1e293b;
  --muted: #64748b;
  --bg: #f8fafc;
}

* { box-sizing: border-box; }

body {
  font-family: "Segoe UI", "Microsoft JhengHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
}

.topbar {
  background: white;
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  font-weight: bold;
  font-size: 1.1rem;
  color: var(--primary);
  text-decoration: none;
}

.topbar nav {
  display: flex;
  gap: 1rem;
  flex: 1;
}

.topbar a {
  color: var(--text);
  text-decoration: none;
}

.topbar nav a:hover, .brand:hover {
  color: var(--primary);
}

.user-info {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1.5rem;
}

.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.5rem;
  max-width: 700px;
}

.card.narrow {
  max-width: 380px;
  margin: 3rem auto;
}

form label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

form input[type=text], form input[type=password], form input[type=url],
form input[type=email], form input[type=date], form input[type=file], form textarea {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 1rem;
  color: var(--text);
}

form .checkbox-line {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

form .checkbox-line input { width: auto; }

button, .btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 0.55rem 1.1rem;
  border-radius: 4px;
  font-size: 0.95rem;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

button:hover, .btn:hover { background: var(--primary-dark); }

.btn-secondary {
  background: white;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  padding: 0;
  font-size: 0.9rem;
  text-decoration: underline;
  cursor: pointer;
}

h1 { font-size: 1.4rem; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.list-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.list-table th, .list-table td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 0.9rem;
}

.list-table th {
  background: #f1f5f9;
  color: var(--muted);
  font-weight: 600;
}

.overdue-row { background: var(--danger-bg); }
.inactive-row { color: var(--muted); }

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: #e2e8f0;
}

.tag-overdue { background: var(--danger-bg); color: var(--danger); }
.tag-done { background: var(--success-bg); color: var(--success); }

.flash {
  padding: 0.6rem 1rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.flash-error { background: var(--danger-bg); color: var(--danger); }
.flash-success { background: var(--success-bg); color: var(--success); }

.hint { color: var(--muted); font-size: 0.9rem; }

fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-bottom: 1rem;
}

.quick-select {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.quick-select button {
  background: #f1f5f9;
  color: var(--text);
  padding: 0.2rem 0.6rem;
  font-size: 0.8rem;
}

.staff-checklist {
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem;
}

.staff-item {
  display: block;
  font-size: 0.9rem;
  padding: 0.15rem 0;
  color: var(--text);
}

.staff-item input { width: auto; margin-right: 0.4rem; }

code {
  background: #f1f5f9;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
}