/* ── CSS Variables ─────────────────────────────────────────── */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-bg: #eef2ff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    --sidebar-bg: #0f172a;
    --sidebar-w: 240px;
    --sidebar-w-col: 64px;
    --topbar-h: 60px;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --border-dark: #cbd5e1;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --shadow: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
    --shadow-md: 0 4px 24px rgba(0,0,0,.10);
    --transition: .18s ease;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.btn-update-password {
    background: transparent;
    color: var(--primary);
    padding: 3px 5px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 4px;
    font-weight:bold;
    text-align:right;
    width: max-content;
    position: absolute;
    right:0px;
    margin-bottom:5px;
    bottom:-15px;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ── Page Header ───────────────────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
}

    .page-header > div {
        display: flex;
        flex-direction: column;
    }

.page-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 6px;
}

.page-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 2px;
}

.title-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--primary);
}

/* ── Class Tabs Wrapper ────────────────────────────────────── */
/* Outer wrapper clips overflow and shows scrollbar */
.class-tabs-wrapper {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
    /* Custom scrollbar */
    scrollbar-width: thin;
    scrollbar-color: var(--border-dark) transparent;
    padding: 8px 0px !important;
}

    .class-tabs-wrapper::-webkit-scrollbar {
        height: 4px;
    }

    .class-tabs-wrapper::-webkit-scrollbar-track {
        background: transparent;
    }

    .class-tabs-wrapper::-webkit-scrollbar-thumb {
        background: var(--border-dark);
        border-radius: 99px;
    }

    .class-tabs-wrapper .text-muted, .school-tabs-wrapper .text-muted{
        font-weight: bolder !important;
        color: black !important;
        text-transform: uppercase !important;
        letter-spacing: 0.2px !important;
        font-size: 12px !important;
    }

/* ── Class Tabs Row ───────────────────────────────────────── */
.class-tabs {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px;
    /* Prevent wrapping so tabs stay in a single row and trigger scroll */
    white-space: nowrap;
    width: max-content;
    min-width: 100%;
}

/* ── Tab Button ───────────────────────────────────────────── */
.class-tab {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

    .class-tab:hover {
        background: var(--primary-bg);
        color: var(--primary);
    }

    /* Active state */
    .class-tab.active {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        box-shadow: 0 4px 12px rgba(99, 102, 241, 0.30);
    }

        .class-tab.active:hover {
            opacity: 0.92;
        }

/* ── Skeleton Loading ─────────────────────────────────────── */
.tab-skeleton {
    display: inline-flex;
    width: 100px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: linear-gradient(90deg, var(--border) 25%, #f1f5f9 50%, var(--border) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    flex-shrink: 0;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* ── Empty State ──────────────────────────────────────────── */
.tab-empty {
    font-size: 13px;
    color: var(--text-light);
    padding: 8px 12px;
}

/* ── student Grid ─────────────────────────────────────────────── */
.student-grid {
    margin-top: 15px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

/* ── Card ─────────────────────────────────────────────────── */
.student-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

    .student-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }

.modal-body label {
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.form-group-checkbox {
    display: flex;
    justify-content: start;
    align-items: center;
}

.form-input-checkbox {
    cursor:pointer;
    margin-right:10px;
    width: 18px;
    height: 18px;
}
/* ── Mobile ───────────────────────────────────────────────── */
@media (max-width: 480px) {
    .page-title {
        font-size: 20px;
    }

    .page-subtitle {
        font-size: 13px;
    }

    .class-tab {
        padding: 7px 14px;
        font-size: 12px;
    }

    .student-grid {
        grid-template-columns: 1fr;
        padding-bottom: 80px;
    }
}