/* ND International School - Main Stylesheet */
:root {
    --primary-color: #ffc107;
    --primary-dark: #e0a800;
    --sidebar-width: 260px;
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-active: #ffc107;
}

/* Sidebar */
#sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: sticky;
    top: 0;
    flex-shrink: 0;
    overflow-y: auto;
    transition: all 0.3s;
    z-index: 1000;
}
#sidebar .sidebar-brand {
    padding: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
#sidebar .sidebar-brand h5 {
    color: #fff;
    font-size: 1rem;
    margin: 0;
}
#sidebar .sidebar-brand small {
    color: var(--sidebar-text);
    font-size: 0.7rem;
}
#sidebar .nav-link {
    color: var(--sidebar-text);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border-left: 3px solid transparent;
    transition: all 0.2s;
}
#sidebar .nav-link:hover {
    color: #fff;
    background: rgba(255,255,255,0.05);
}
#sidebar .nav-link.active {
    color: var(--sidebar-active);
    background: rgba(255,193,7,0.1);
    border-left-color: var(--sidebar-active);
    font-weight: 600;
}
#sidebar .nav-link i {
    width: 1.5rem;
    text-align: center;
}
#sidebar .sidebar-section {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(148,163,184,0.5);
    padding: 0.75rem 1rem 0.25rem;
    margin-top: 0.5rem;
}

/* Main Content */
#mainContent {
    min-height: 100vh;
    background: #f8f9fa;
}

/* Cards */
.card {
    border: none;
    border-radius: 0.5rem;
}
.card-header {
    background: transparent;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Buttons */
.btn-warning {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #212529;
}
.btn-warning:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #212529;
}
.btn-outline-warning {
    color: var(--primary-dark);
    border-color: var(--primary-color);
}
.btn-outline-warning:hover {
    background-color: var(--primary-color);
    color: #212529;
}

/* Tables */
.table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    font-weight: 600;
    white-space: nowrap;
}
.table td {
    vertical-align: middle;
    font-size: 0.875rem;
}

/* Forms */
.form-label {
    font-size: 0.85rem;
    font-weight: 500;
}
.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(255,193,7,0.25);
}

/* Badges */
.badge {
    font-weight: 500;
    font-size: 0.75rem;
}

/* Alert */
.alert {
    border-radius: 0.5rem;
    font-size: 0.9rem;
}

/* Navbar */
.navbar {
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

/* Stats Cards */
.stats-card {
    transition: transform 0.2s;
}
.stats-card:hover {
    transform: translateY(-2px);
}

/* Print Styles */
@media print {
    #sidebar, .navbar, .btn, .no-print {
        display: none !important;
    }
    #mainContent {
        margin: 0;
        padding: 0;
    }
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* Responsive */
@media (max-width: 991.98px) {
    #sidebar {
        position: fixed;
        left: -100%;
        z-index: 1050;
    }
    #sidebar.show {
        left: 0;
    }
}

/* Scrollbar for sidebar */
#sidebar::-webkit-scrollbar {
    width: 4px;
}
#sidebar::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

/* Misc */
.text-primary { color: var(--primary-dark) !important; }
.bg-primary { background-color: var(--primary-color) !important; }
.border-primary { border-color: var(--primary-color) !important; }
a { color: var(--primary-dark); }
.page-link.active { background-color: var(--primary-color); border-color: var(--primary-color); color: #212529; }