:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #e2e5ea;
  --color-text: #1f2328;
  --color-text-muted: #6b7280;
  --color-primary: #2f7d4f;
  --color-primary-hover: #256640;
  --color-danger: #d1453b;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* 상단 네비게이션 */
.topnav {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 24px;
  height: 56px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.topnav .brand {
  font-weight: 700;
  font-size: 16px;
}

.topnav .nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
}

.topnav .nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text-muted);
}

.topnav .nav-links a:hover,
.topnav .nav-links a.active {
  background: var(--color-bg);
  color: var(--color-text);
}

.topnav .user-area {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--color-text-muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 14px;
  cursor: pointer;
}

.btn:hover {
  background: var(--color-bg);
}

.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-text {
  border: none;
  background: none;
  color: var(--color-primary);
  padding: 4px 8px;
}

/* 레이아웃 */
.page-body {
  padding: 32px 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.with-sidebar {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  max-width: 1300px;
  margin: 0 auto;
  padding: 24px;
}

.sidebar {
  width: 200px;
  flex-shrink: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
}

.sidebar a {
  display: block;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 4px;
}

.sidebar a:hover,
.sidebar a.active {
  background: var(--color-bg);
  font-weight: 600;
}

.content {
  flex: 1;
  min-width: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.card-grid a.tile {
  display: block;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-weight: 600;
  text-align: center;
}

.card-grid a.tile:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* 로그인 페이지 */
.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-box {
  width: 340px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.filter-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 34px;
}

.filter-btn {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 13px;
  cursor: pointer;
}

.filter-btn:hover {
  border-color: var(--color-primary);
}

.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.filter-btn-empty {
  color: var(--color-text-muted);
  font-size: 13px;
  padding: 6px 0;
}

.filter-btn-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 999px;
  font-size: 11px;
  background: var(--color-text-muted);
  color: var(--color-surface);
  vertical-align: middle;
}

.filter-btn.active .filter-btn-badge {
  background: rgba(255, 255, 255, 0.35);
  color: #fff;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.admin-table th,
.admin-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  white-space: nowrap;
}

.admin-table th {
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-weight: 600;
}

.admin-table td.center {
  text-align: center;
}

.admin-table input[type="text"],
.admin-table input[type="password"] {
  width: 140px;
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
}

.admin-table select {
  padding: 6px 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 13px;
}

.auth-box h1 {
  font-size: 18px;
  margin: 0 0 20px;
  text-align: center;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
}

.form-error {
  color: var(--color-danger);
  font-size: 13px;
  margin: 8px 0;
  min-height: 16px;
}

.auth-box .btn {
  width: 100%;
}

.auth-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* 모달 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-overlay[hidden] {
  display: none;
}

.modal-box {
  width: 340px;
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 24px;
}

.modal-box h2 {
  font-size: 16px;
  margin: 0 0 16px;
}

.modal-actions {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}

.modal-actions .btn {
  flex: 1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #17181c;
    --color-surface: #202126;
    --color-border: #33353b;
    --color-text: #eceef1;
    --color-text-muted: #9aa0aa;
    --color-primary: #4caf7d;
    --color-primary-hover: #5cc490;
  }
}