:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --accent: #16a34a;
  --danger: #ef4444;
  --border: #e2e8f0;
  --sidebar: #0f172a;
  --sidebar-ink: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

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

.admin-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  background: linear-gradient(180deg, #0f172a 0%, #111827 100%);
  color: var(--sidebar-ink);
  padding: 24px 18px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nav a {
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--sidebar-ink);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.2s ease;
}

.nav a.active,
.nav a:hover {
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-footer {
  margin-top: auto;
  font-size: 12px;
  color: #94a3b8;
}

.main {
  flex: 1;
  padding: 28px 32px 40px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.topbar h1 {
  margin: 0;
  font-size: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s ease;
}

.button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

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

.button.danger {
  background: #fee2e2;
  border-color: #fecaca;
  color: var(--danger);
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.grid {
  display: grid;
  gap: 20px;
}

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 12px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 14px;
}

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

.badge {
  display: inline-block;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #e0f2fe;
  color: #0369a1;
}

.text-muted {
  color: var(--muted);
  font-size: 13px;
  margin: 6px 0 0;
}

.image-preview {
  display: block;
  margin-top: 10px;
  max-width: 220px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.image-preview-sm {
  width: 48px;
  height: 48px;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.image-placeholder-sm {
  width: 48px;
  height: 48px;
  background: #f1f5f9;
  border-radius: 10px;
  border: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 10px;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.image-grid img {
  width: 100px;
  height: 100px;
  border-radius: 12px;
  border: 1px solid var(--border);
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.form-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full {
  grid-column: 1 / -1;
}

input,
select,
textarea {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 14px;
}

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

.notice {
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 14px;
}

.notice.error {
  background: #fee2e2;
  color: #b91c1c;
}

.notice.success {
  background: #dcfce7;
  color: #15803d;
}

.progress-wrap {
  width: 100%;
  height: 14px;
  border-radius: 999px;
  background: #e2e8f0;
  overflow: hidden;
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, #0ea5e9, #22c55e);
  transition: width 0.3s ease;
}

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--panel);
  border-radius: 18px;
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.1);
}

.login-card h1 {
  margin-top: 0;
  margin-bottom: 8px;
}

.login-card p {
  color: var(--muted);
  margin-top: 0;
}

@media (max-width: 960px) {
  .admin-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    flex-direction: row;
    align-items: center;
    overflow-x: auto;
    height: auto;
    position: static;
    overflow-y: visible;
  }

  .nav {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .main {
    padding: 20px;
  }

  .grid.cols-3 {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}