:root {
    --xw-primary: #1a5c8a;
    --xw-secondary: #2e8b57;
    --xw-accent: #f0ad4e;
}

body {
    background-color: #f5f6fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.footer {
    margin-top: auto;
}

.navbar-brand {
    font-weight: 600;
    letter-spacing: 1px;
}

.card {
    border-radius: 12px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

.card-header {
    border-radius: 12px 12px 0 0 !important;
}

.subject-card .card-header {
    font-weight: 600;
}

.subject-card .card-body {
    max-height: 700px;
    overflow-y: auto;
}

.subject-card h6 {
    margin-top: 1rem;
}

.subject-card h6:first-child {
    margin-top: 0;
}

/* Login tabs */
.nav-tabs .nav-link {
    font-weight: 500;
    padding: 12px;
    border: none;
    color: #6c757d;
}

.nav-tabs .nav-link.active {
    color: var(--xw-primary);
    border-bottom: 3px solid var(--xw-primary);
    background: transparent;
}

.nav-tabs .nav-link:hover:not(.active) {
    border-bottom: 3px solid #dee2e6;
}

/* Survey */
.option-btn {
    cursor: pointer;
    transition: all 0.15s ease;
}

.option-btn:hover {
    background-color: #e9ecef;
}

.option-btn.active {
    background-color: #198754 !important;
    color: white !important;
    border-color: #198754 !important;
}

.jump-btn {
    transition: all 0.15s ease;
}

/* Course selection */
.course-select:disabled {
    background-color: #e9ecef;
    cursor: not-allowed;
}

/* Admin tables */
.table th {
    white-space: nowrap;
}

.btn-sm {
    margin: 2px;
}

/* Dashboard cards */
.badge.fs-6 {
    font-size: 1rem !important;
}

/* Flash message position */
.alert {
    border-radius: 8px;
}

/* Chart container */
canvas#result-chart {
    max-height: 300px;
}

/* Responsive */
@media (max-width: 768px) {
    .card:hover {
        transform: none;
    }
    .subject-card .card-body {
        max-height: 400px;
    }
}