:root {
  --bg: #f4f7ff;
  --surface: #ffffff;
  --surface-alt: #f8fafc;
  --border: #dbe4ef;
  --text: #0f172a;
  --muted: #475569;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #f59e0b;
  --radius: 18px;
  font-family: Inter, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #eef4ff 0%, #f8fbff 100%);
  color: var(--text);
}

img {
  max-width: 100%;
  display: block;
}

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

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.page-header {
  padding: 24px 28px 14px;
  max-width: 1220px;
  margin: 0 auto;
}

.page-header h1 {
  margin: 0;
  font-size: 2.2rem;
  letter-spacing: -0.02em;
}

.page-header p {
  margin: 10px 0 0;
  color: var(--muted);
  max-width: 760px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  padding: 0 20px 18px;
  margin: 0 auto;
  max-width: 1220px;
}

.site-nav a {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 16px;
  color: var(--text);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  transform: translateY(-1px);
}

.admin-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.admin-sidebar {
  position: sticky;
  top: 20px;
  align-self: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 16px 45px rgba(15, 23, 42, 0.08);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.sidebar-brand .logo {
  width: 48px;
  border-radius: 14px;
}

.sidebar-brand div h2 {
  margin: 0;
  font-size: 1.05rem;
}

.sidebar-brand div p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.section-list {
  display: grid;
  gap: 8px;
}

.section-list button {
  width: 100%;
  border: 1px solid transparent;
  border-radius: 14px;
  background: #f8fafc;
  color: var(--text);
  text-align: left;
  padding: 14px 16px;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.section-list button.active,
.section-list button:hover {
  background: #eff6ff;
  border-color: var(--primary);
}

.admin-main {
  display: grid;
  gap: 24px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
}

.panel.hidden {
  display: none;
}

.panel h2 {
  margin-top: 0;
  font-size: 1.45rem;
}

.panel-grid {
  display: grid;
  gap: 22px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 18px;
}

.stat-card {
  background: var(--surface-alt);
  border-radius: 18px;
  padding: 22px;
  border: 1px solid var(--border);
}

.stat-card h3 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  color: var(--muted);
}

.stat-card p {
  margin: 0;
  font-size: 2rem;
  color: var(--primary);
}

.form-grid {
  display: grid;
  gap: 18px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.input-group {
  display: grid;
  gap: 8px;
}

label {
  font-weight: 600;
  color: var(--muted);
}

input[type='text'],
input[type='date'],
input[type='url'],
textarea,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-alt);
  padding: 14px 16px;
  color: var(--text);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

button.primary-btn {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 14px;
  padding: 14px 22px;
  font-weight: 600;
}

button.secondary-btn {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--border);
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 8px;
}

.status-message {
  margin-top: 8px;
  font-weight: 600;
}

.status-message.success {
  color: var(--success);
}

.status-message.error {
  color: var(--danger);
}

.list-card {
  background: var(--surface-alt);
  border-radius: 18px;
  padding: 18px;
  border: 1px solid var(--border);
}

.list-card .item-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.list-card .item-row:last-child {
  border-bottom: none;
}

.item-summary {
  display: grid;
  gap: 8px;
}

.item-summary h3 {
  margin: 0;
  font-size: 1.05rem;
}

.item-summary p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.item-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eef2ff;
  color: #312e81;
  font-size: 0.83rem;
}

.action-buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.action-buttons button {
  border-radius: 14px;
  border: 1px solid transparent;
  padding: 10px 14px;
  font-weight: 600;
}

.action-buttons button.edit {
  background: #ffffff;
  color: var(--primary);
  border-color: var(--border);
}

.action-buttons button.delete {
  background: var(--danger);
  color: white;
}

.empty-state {
  color: var(--muted);
  padding: 18px 0;
}

.filter-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  margin-bottom: 18px;
}

.filter-bar.compact-filter-bar {
  gap: 12px;
  margin-top: 12px;
}

.filter-bar input,
.filter-bar select {
  width: 100%;
}

.spaced-top-24 {
  margin-top: 24px;
}

.spaced-top-18 {
  margin-top: 18px;
}

.panel-top-spacing {
  margin-top: 20px;
}

.summary-header-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.hidden {
  display: none !important;
}

@media (max-width: 960px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    position: static;
  }
}

@media (max-width: 720px) {
  .form-row,
  .stats-grid,
  .filter-bar {
    grid-template-columns: 1fr;
  }

  .item-row {
    grid-template-columns: 1fr;
  }

  .action-buttons {
    justify-content: flex-start;
  }
}