/* =========================================================
   CBT Admin Panel — Stylesheet
   ========================================================= */

/* ---- Admin Login Page ---- */
.admin-login-page {
    min-height: 100vh;
    background: var(--gray-900);
    display: flex; align-items: center; justify-content: center;
    padding: 24px 16px;
}
.admin-login-container { width: 100%; max-width: 400px; }
.admin-login-card {
    background: white; border-radius: var(--radius-xl);
    padding: 40px 36px; box-shadow: 0 20px 60px rgba(0,0,0,.4);
    animation: fadeUp 0.35s ease;
}
.admin-login-header { text-align: center; margin-bottom: 32px; }
.admin-logo { display: inline-flex; margin-bottom: 16px; }
.admin-login-header h1 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: 4px; }
.admin-login-header p  { color: var(--gray-500); font-size: 0.9rem; }

.admin-login-form .form-group { margin-bottom: 18px; }
.btn-admin-login {
    width: 100%; padding: 13px;
    background: var(--gray-900); color: white;
    border-radius: var(--radius); font-size: 0.95rem; font-weight: 600;
    transition: background var(--transition), transform var(--transition);
    margin-top: 8px;
    display: flex; align-items: center; justify-content: center;
}
.btn-admin-login:hover {
    background: var(--gray-700); transform: translateY(-1px);
}
.admin-login-footer { text-align: center; margin-top: 20px; font-size: 0.82rem; }
.admin-login-footer a { color: var(--gray-400); }
.admin-login-footer a:hover { color: var(--gray-600); }

/* ---- Admin Layout ---- */
.admin-page {
    display: flex; height: 100vh; background: var(--gray-100);
}

/* Sidebar */
.admin-sidebar {
    width: 220px; background: var(--gray-900); color: white;
    display: flex; flex-direction: column;
    flex-shrink: 0; overflow: hidden;
}
.sidebar-brand {
    display: flex; align-items: center; gap: 12px;
    padding: 20px 18px; border-bottom: 1px solid rgba(255,255,255,.08);
    font-size: 0.9rem; font-weight: 700; color: white;
}
.sidebar-nav { flex: 1; padding: 12px 10px; }
.sidebar-link {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: var(--radius-sm);
    font-size: 0.88rem; font-weight: 600; color: rgba(255,255,255,.6);
    transition: all var(--transition);
}
.sidebar-link:hover { background: rgba(255,255,255,.08); color: white; }
.sidebar-link.active { background: rgba(37,99,235,.4); color: white; }

.sidebar-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 18px; border-top: 1px solid rgba(255,255,255,.08);
}
.sidebar-user { display: flex; align-items: center; gap: 10px; overflow: hidden; }
.sidebar-avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--primary); display: flex; align-items: center; justify-content: center;
    font-size: 0.8rem; font-weight: 700; color: white; flex-shrink: 0;
}
.sidebar-user span { font-size: 0.85rem; color: rgba(255,255,255,.8); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-logout {
    color: rgba(255,255,255,.4); display: flex; align-items: center;
    padding: 6px; border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
    flex-shrink: 0;
}
.sidebar-logout:hover { color: white; background: rgba(255,255,255,.08); }

/* Admin Main */
.admin-main { flex: 1; overflow-y: auto; padding: 28px 28px 40px; }

.admin-page-header {
    display: flex; align-items: flex-start; justify-content: space-between;
    margin-bottom: 24px; gap: 16px; flex-wrap: wrap;
}
.admin-page-title { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); margin-bottom: 2px; }
.admin-page-subtitle { font-size: 0.88rem; color: var(--gray-500); }
.btn-view-exam {
    display: flex; align-items: center; gap: 7px;
    padding: 9px 16px; background: white; color: var(--gray-700);
    border: 1.5px solid var(--gray-200); border-radius: var(--radius);
    font-size: 0.85rem; font-weight: 600;
    transition: all var(--transition);
}
.btn-view-exam:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px; margin-bottom: 24px;
}
.stat-card {
    background: white; border-radius: var(--radius-lg);
    padding: 20px; display: flex; align-items: center; gap: 16px;
    box-shadow: var(--shadow-sm); border: 1px solid var(--gray-200);
    transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-card-icon {
    width: 48px; height: 48px; border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.stat-icon-blue   { background: #EFF6FF; color: var(--primary); }
.stat-icon-green  { background: #ECFDF5; color: var(--success); }
.stat-icon-yellow { background: #FFFBEB; color: var(--warning); }
.stat-icon-purple { background: #F5F3FF; color: #7C3AED; }

.stat-card-body { min-width: 0; }
.stat-number { font-size: 1.75rem; font-weight: 800; color: var(--gray-900); line-height: 1; }
.stat-label  { font-size: 0.8rem; color: var(--gray-500); margin-top: 4px; }

/* Filter bar */
.filter-bar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.filter-form { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-search {
    position: relative; display: flex; align-items: center;
}
.search-icon { position: absolute; left: 12px; color: var(--gray-400); pointer-events: none; }
.filter-input {
    padding: 9px 14px 9px 36px; border: 1.5px solid var(--gray-200);
    border-radius: var(--radius); font-size: 0.88rem; width: 240px;
    background: white; color: var(--gray-800); outline: none;
    transition: border-color var(--transition);
}
.filter-input:focus { border-color: var(--primary); }
.filter-select {
    padding: 9px 14px; border: 1.5px solid var(--gray-200);
    border-radius: var(--radius); font-size: 0.88rem;
    background: white; color: var(--gray-700); outline: none;
    cursor: pointer;
}
.btn-filter {
    padding: 9px 18px; background: var(--primary); color: white;
    border-radius: var(--radius); font-size: 0.88rem; font-weight: 600;
    transition: background var(--transition);
}
.btn-filter:hover { background: var(--primary-dark); }
.btn-clear-filter {
    padding: 9px 14px; color: var(--gray-500); font-size: 0.88rem;
    border: 1.5px solid var(--gray-200); border-radius: var(--radius); background: white;
    transition: all var(--transition);
}
.btn-clear-filter:hover { color: var(--danger); border-color: var(--danger); }
.filter-count { font-size: 0.85rem; color: var(--gray-500); white-space: nowrap; }

/* Table Card */
.table-card {
    background: white; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); border: 1px solid var(--gray-200);
    overflow: hidden;
}
.table-responsive { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
.data-table thead th {
    padding: 13px 16px; text-align: left;
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .06em; color: var(--gray-500);
    background: var(--gray-50); border-bottom: 1px solid var(--gray-200);
    white-space: nowrap;
}
.data-table tbody .table-row { transition: background var(--transition); }
.data-table tbody .table-row:hover { background: var(--gray-50); }
.data-table td { padding: 13px 16px; border-bottom: 1px solid var(--gray-100); vertical-align: middle; }
.data-table tbody tr:last-child td { border-bottom: none; }

.td-number { color: var(--gray-400); font-weight: 600; width: 48px; }
.td-name { display: flex; align-items: center; gap: 10px; min-width: 160px; font-weight: 600; color: var(--gray-800); }
.table-avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--primary-light); color: var(--primary);
    font-size: 0.8rem; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.td-subjects { min-width: 280px; }
.score-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.score-chip {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 3px 9px; background: var(--gray-100);
    border-radius: 99px; border: 1px solid var(--gray-200);
    font-size: 0.78rem;
}
.chip-code { font-weight: 700; color: var(--gray-500); }
.chip-score { font-weight: 600; color: var(--gray-700); }

.td-total strong { font-size: 1rem; color: var(--gray-800); }
.td-poss { font-size: 0.82rem; color: var(--gray-400); }
.pct-badge {
    display: inline-block; padding: 4px 10px;
    border-radius: 99px; font-size: 0.8rem; font-weight: 700;
    border: 1px solid; white-space: nowrap;
}
.td-duration { color: var(--gray-500); white-space: nowrap; }
.td-date { color: var(--gray-600); white-space: nowrap; }
.td-time { display: block; font-size: 0.78rem; color: var(--gray-400); }

/* Empty state */
.empty-state {
    padding: 60px 20px; text-align: center;
    display: flex; flex-direction: column; align-items: center; gap: 12px;
    color: var(--gray-500);
}
.empty-state p { font-size: 0.95rem; }

/* Pagination */
.pagination {
    display: flex; align-items: center; gap: 6px;
    padding: 16px 20px; border-top: 1px solid var(--gray-100);
    flex-wrap: wrap;
}
.page-btn {
    display: flex; align-items: center; justify-content: center;
    min-width: 36px; height: 36px; padding: 0 6px;
    border: 1.5px solid var(--gray-200); border-radius: var(--radius-sm);
    font-size: 0.85rem; font-weight: 600; color: var(--gray-600);
    background: white; transition: all var(--transition);
}
.page-btn:hover:not(.disabled):not(.active) { border-color: var(--primary); color: var(--primary); }
.page-btn.active { background: var(--primary); border-color: var(--primary); color: white; }
.page-btn.disabled { opacity: 0.4; pointer-events: none; }
.page-info { font-size: 0.82rem; color: var(--gray-400); margin-left: 8px; }

/* Responsive Admin */
@media (max-width: 900px) {
    .admin-sidebar { width: 56px; }
    .sidebar-brand span, .sidebar-link span, .sidebar-user span,
    .sidebar-brand svg + span { display: none; }
    .sidebar-brand { justify-content: center; padding: 16px; }
    .sidebar-link { justify-content: center; padding: 12px; }
    .sidebar-footer { justify-content: center; padding: 12px; }
    .sidebar-user { justify-content: center; }
    .sidebar-logout { margin-left: 0; }
    .admin-main { padding: 20px 16px; }
}
@media (max-width: 600px) {
    .admin-sidebar { display: none; }
    .admin-page { display: block; }
    .admin-main { padding: 16px; overflow-y: auto; height: 100vh; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .filter-input { width: 180px; }
}