body {
    color: #212529;
}

.hero-section {
    background: linear-gradient(
            135deg,
            #f8f9fa 0%,
            #eef3ff 100%
    );
}

.hero-title {
    letter-spacing: -1px;
}

.series-card,
.test-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.series-card:hover,
.test-card:hover {
    transform: translateY(-3px);
}

.series-icon {
    width: 52px;
    height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background-color: #e9f0ff;
    color: #0d6efd;
    font-weight: 700;
}

.footer-brand {
    font-size: 1.25rem;
    font-weight: 700;
}

@media (min-width: 992px) {
    .w-lg-auto {
        width: auto !important;
    }
}

.navbar-toggler {
    border: 1px solid #dee2e6;
    padding: 6px 8px;
    width: 44px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 22px;
    height: 18px;
}

.hamburger-icon span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #212529;
    border-radius: 2px;
}

.badge-paid {
    background-color: #ffc107 !important;
    color: #212529 !important;
}

.badge-free {
    background-color: #198754 !important;
    color: #fff !important;
}

.role-user {
    background-color: #0d6efd !important;
    color: #fff !important;
}

.role-subscribed {
    background-color: #198754 !important;
    color: #fff !important;
}

.role-admin {
    background-color: #dc3545 !important;
    color: #fff !important;
}

.status-active {
    background-color: #198754 !important;
    color: #fff !important;
}

.status-inactive {
    background-color: #6c757d !important;
    color: #fff !important;
}