:root {
  --bg: #f4f6fb;
  --card-bg: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --present: #16a34a;
  --late: #d97706;
  --absent: #dc2626;
  --leave: #7c3aed;
  --weekend: #94a3b8;
  --pending: #64748b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: #334155;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Malgun Gothic", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 18px; }
.topbar nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.topbar nav a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}
.topbar nav a:hover { background: var(--bg); }
.user { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--muted); }
.container { max-width: 1000px; margin: 0 auto; padding: 24px 16px 64px; }
h1 { font-size: 24px; margin: 0 0 20px; }
h2 { font-size: 18px; margin: 32px 0 12px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 8px; }
.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.card-label { color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.card-value { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.tag { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 13px; font-weight: 600; background: var(--bg); color: var(--muted); }
.tag-present { background: rgb(22 163 74 / .12); color: var(--present); }
.tag-late { background: rgb(217 119 6 / .12); color: var(--late); }
.tag-absent { background: rgb(220 38 38 / .12); color: var(--absent); }
.tag-leave { background: rgb(124 58 237 / .12); color: var(--leave); }
.tag-weekend { background: rgb(148 163 184 / .12); color: var(--weekend); }
.tag-pending { background: rgb(100 116 139 / .12); color: var(--pending); }
.data-table { width: 100%; border-collapse: collapse; background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; font-size: 14px; }
.data-table th, .data-table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { color: var(--muted); font-weight: 600; font-size: 13px; }
.data-table tr:last-child td { border-bottom: none; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 20px; align-items: end; }
.form-grid label, .auth-card label, .filter-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.form-grid input, .form-grid select, .auth-card input, .filter-form input, .filter-form select {
  padding: 9px 10px; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text); font-size: 14px;
}
.span-2 { grid-column: span 2; }
.btn-primary, .btn-ghost, .btn-danger {
  padding: 9px 16px; border-radius: 8px; border: none; font-size: 14px; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-block;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: rgb(220 38 38 / .1); color: var(--danger); }
.inline-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.auth-card { max-width: 380px; margin: 60px auto; background: var(--card-bg); border: 1px solid var(--border); border-radius: 16px; padding: 32px; }
.auth-card form { display: flex; flex-direction: column; gap: 14px; margin-top: 16px; }
.error { color: var(--danger); font-size: 14px; }
.muted { color: var(--muted); font-size: 13px; }
.filter-form { margin-bottom: 16px; }
.actions { display: flex; gap: 8px; }
@media (max-width: 640px) {
  .topbar { flex-direction: column; align-items: flex-start; }
  .data-table { display: block; overflow-x: auto; }
}