/* ===== Admin CSS ===== */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700&display=swap');

:root {
  --primary: #2563EB; --primary-dark: #1d4ed8;
  --success: #16A34A; --danger: #DC2626; --warning: #D97706;
  --gray-50: #F9FAFB; --gray-100: #F3F4F6; --gray-200: #E5E7EB;
  --gray-600: #4B5563; --gray-900: #111827;
  --sidebar-w: 240px; --radius: 10px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Outfit', sans-serif; }
a { color: var(--primary); text-decoration: none; }
.admin-body { background: var(--gray-50); }
.admin-wrapper { display: grid; grid-template-columns: var(--sidebar-w) 1fr; min-height: 100vh; }

/* Sidebar */
.admin-sidebar { background: var(--gray-900); color: #fff; display: flex; flex-direction: column; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.sidebar-brand { padding: 1.5rem 1.2rem; font-size: 1.15rem; font-weight: 800; border-bottom: 1px solid #374151; }
.sidebar-nav { display: flex; flex-direction: column; padding: 1rem 0; flex: 1; }
.sidebar-nav a { padding: .7rem 1.2rem; color: #d1d5db; font-size: .9rem; font-weight: 500; display: flex; align-items: center; gap: .5rem; border-left: 3px solid transparent; transition: all .15s; }
.sidebar-nav a:hover, .sidebar-nav a.active { color: #fff; background: rgba(255,255,255,.06); border-left-color: var(--primary); text-decoration: none; }
.badge { background: var(--danger); color: #fff; font-size: .7rem; padding: .1rem .4rem; border-radius: 20px; margin-left: auto; }
.sidebar-footer { padding: 1rem 1.2rem; border-top: 1px solid #374151; font-size: .85rem; color: #9ca3af; }
.btn-logout { background: none; border: 1px solid #374151; color: #9ca3af; padding: .3rem .8rem; border-radius: 6px; cursor: pointer; font-family: inherit; font-size: .82rem; margin-top: .5rem; display: block; width: 100%; text-align: center; }
.btn-logout:hover { background: rgba(255,255,255,.05); color: #fff; }

/* Main */
.admin-main { display: flex; flex-direction: column; min-height: 100vh; }
.admin-topbar { background: #fff; border-bottom: 1px solid var(--gray-200); padding: 1rem 1.5rem; display: flex; align-items: center; gap: 1rem; position: sticky; top: 0; z-index: 50; }
.sidebar-toggle { background: none; border: none; font-size: 1.3rem; cursor: pointer; }
.page-title { font-size: 1.15rem; font-weight: 700; }
.admin-content { padding: 2rem 1.5rem; flex: 1; }
.admin-flash { padding: .8rem 1.5rem; font-weight: 600; font-size: .9rem; }
.admin-flash-success { background: #d1fae5; color: #065f46; }
.admin-flash-error   { background: #fee2e2; color: #991b1b; }

/* Stat cards */
.admin-stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; margin-bottom: 2rem; }
.admin-stat-card { background: #fff; border-radius: var(--radius); padding: 1.3rem; box-shadow: 0 2px 12px rgba(0,0,0,.07); display: flex; align-items: center; gap: 1rem; border-left: 4px solid; }
.admin-stat-card.blue   { border-left-color: var(--primary); }
.admin-stat-card.indigo { border-left-color: #6366f1; }
.admin-stat-card.green  { border-left-color: var(--success); }
.admin-stat-card.red    { border-left-color: var(--danger); }
.asc-icon { font-size: 1.8rem; }
.asc-num  { display: block; font-size: 1.8rem; font-weight: 800; }
.asc-label{ font-size: .8rem; color: var(--gray-600); }
.admin-dash-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.admin-table-card { background: #fff; border-radius: var(--radius); padding: 1.5rem; box-shadow: 0 2px 12px rgba(0,0,0,.07); }
.atc-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.atc-header h2 { font-size: 1rem; font-weight: 700; }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.data-table th, .data-table td { padding: .65rem 1rem; text-align: left; border-bottom: 1px solid var(--gray-200); }
.data-table th { font-weight: 700; color: var(--gray-600); background: var(--gray-50); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.data-table tr:hover td { background: var(--gray-50); }
.unread-row td { font-weight: 700; }
.table-wrapper { overflow-x: auto; }

/* Forms */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: .35rem; color: var(--gray-900); }
.form-input, .form-select, .form-textarea { width: 100%; font-family: inherit; font-size: .9rem; border: 2px solid var(--gray-200); border-radius: 8px; padding: .55rem .9rem; outline: none; background: #fff; transition: border-color .2s; }
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--primary); }
.form-textarea { resize: vertical; }
.form-error { color: var(--danger); font-size: .8rem; margin-top: .2rem; display: block; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .55rem 1.2rem; border-radius: 7px; font-family: inherit; font-size: .88rem; font-weight: 600; cursor: pointer; border: 2px solid transparent; transition: all .2s; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; color: #fff; }
.btn-outline { background: transparent; color: var(--gray-600); border-color: var(--gray-200); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; text-decoration: none; color: #fff; }
.btn-sm { padding: .3rem .75rem; font-size: .8rem; }
.btn-block { width: 100%; justify-content: center; }

/* Admin login */
.admin-login-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%); }
.admin-login-card { background: #fff; border-radius: 14px; padding: 2.5rem; width: 100%; max-width: 400px; box-shadow: 0 20px 60px rgba(0,0,0,.3); }
.admin-login-card .brand { font-size: 1.5rem; font-weight: 800; text-align: center; margin-bottom: .25rem; }
.admin-login-card .sub { text-align: center; color: var(--gray-600); font-size: .88rem; margin-bottom: 2rem; }

/* Card / Section wrappers */
.admin-card { background: #fff; border-radius: var(--radius); padding: 1.5rem; box-shadow: 0 2px 12px rgba(0,0,0,.07); margin-bottom: 1.5rem; }
.admin-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.2rem; }
.admin-card-header h2 { font-size: 1rem; font-weight: 700; }
.action-bar { display: flex; gap: .75rem; align-items: center; margin-bottom: 1.5rem; flex-wrap: wrap; }

/* Status/badges */
.status-badge { padding: .2rem .65rem; border-radius: 20px; font-size: .75rem; font-weight: 700; }
.badge-active   { background: #d1fae5; color: #065f46; }
.badge-inactive { background: #fee2e2; color: #991b1b; }
.badge-easy     { background: #d1fae5; color: #065f46; }
.badge-medium   { background: #fef3c7; color: #92400e; }
.badge-hard     { background: #fee2e2; color: #991b1b; }
.badge-admin    { background: rgba(37,99,235,.1); color: var(--primary); }
.badge-super    { background: #f3e8ff; color: #7c3aed; }
.badge-unread   { background: var(--danger); color: #fff; }
.badge-read     { background: var(--gray-200); color: var(--gray-600); }

/* Pagination */
.pagination-wrap { display: flex; justify-content: center; gap: .4rem; margin-top: 1.5rem; flex-wrap: wrap; }
.pagination-wrap a, .pagination-wrap span { padding: .4rem .8rem; border-radius: 6px; border: 1px solid var(--gray-200); font-size: .82rem; background: #fff; color: var(--gray-600); }
.pagination-wrap .active span { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Responsive */
@media (max-width: 900px) {
  .admin-wrapper { grid-template-columns: 1fr; }
  .admin-sidebar { position: fixed; left: -260px; top: 0; bottom: 0; z-index: 200; transition: left .25s; }
  .admin-sidebar.open { left: 0; }
  .admin-stats-grid { grid-template-columns: 1fr 1fr; }
  .admin-dash-grid { grid-template-columns: 1fr; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .admin-stats-grid { grid-template-columns: 1fr; }
}