/* ============================================================
   Brainix Tuition — Admin Panel Styles
   (uses CSS variables defined in style.css)
   ============================================================ */

body.admin-body {
    background: #F3F4F6;
    font-family: 'Inter', sans-serif;
}

/* ---- Login ---- */
.admin-auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    padding: 24px;
}
.admin-auth-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
}
.admin-auth-card .navbar-logo { margin: 0 auto 16px; }
.admin-auth-card h1 { text-align: center; font-size: 1.4rem; margin-bottom: 4px; }
.admin-auth-card p.subtitle { text-align: center; color: var(--gray); margin-bottom: 24px; font-size: 0.9rem; }

/* ---- Layout ---- */
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 260px;
    background: var(--dark);
    color: #D1D5DB;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.admin-sidebar .brand {
    display: flex; align-items: center; gap: 12px;
    padding: 24px 20px;
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--white);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.admin-nav { padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; }
.admin-nav a {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 16px;
    border-radius: var(--radius-sm);
    color: #D1D5DB;
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--transition);
}
.admin-nav a:hover { background: rgba(255,255,255,0.06); color: var(--white); }
.admin-nav a.active { background: var(--gradient-primary); color: var(--white); }
.admin-nav .nav-section-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; color: #6B7280; padding: 16px 16px 6px; }

.admin-main { flex-grow: 1; min-width: 0; }
.admin-topbar {
    display: flex; align-items: center; justify-content: space-between;
    background: var(--white);
    padding: 16px 28px;
    box-shadow: var(--shadow-sm);
    position: sticky; top: 0; z-index: 10;
}
.admin-topbar h1 { font-size: 1.2rem; }
.admin-user { display: flex; align-items: center; gap: 12px; }
.admin-user .avatar {
    width: 38px; height: 38px; border-radius: 50%;
    background: var(--gradient-soft);
    color: var(--primary-blue);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-family: 'Poppins', sans-serif;
}
.admin-content { padding: 28px; }

/* ---- Stat cards ---- */
.stat-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}
.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 16px;
}
.stat-card .icon-circle {
    width: 52px; height: 52px;
    border-radius: var(--radius-md);
    background: var(--gradient-soft);
    color: var(--primary-blue);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}
.stat-card .value { font-family: 'Poppins', sans-serif; font-size: 1.6rem; font-weight: 700; }
.stat-card .label { color: var(--gray); font-size: 0.85rem; }

/* ---- Panels / Tables ---- */
.admin-panel {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}
.admin-panel h2 { font-size: 1.05rem; margin-bottom: 16px; }
table.admin-table { width: 100%; border-collapse: collapse; }
table.admin-table th, table.admin-table td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid #EEF0F4;
    font-size: 0.9rem;
}
table.admin-table th { color: var(--gray); font-weight: 600; }
table.admin-table tr:hover td { background: #FAFAFB; }

.alert { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 0.9rem; margin-bottom: 16px; }
.alert-success { background: var(--green-tint); color: var(--primary-green); }
.alert-error { background: #FEE2E2; color: #B91C1C; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.hidden { display: none; }

@media (max-width: 992px) {
    .admin-sidebar { display: none; }
}
@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}