:root {
    --zk-black: #000000;
    --zk-red: #dc3545;
    --zk-white: #ffffff;
    --zk-gray: #212529;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    padding-top: 70px;
}

.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.hero-section {
    background: linear-gradient(135deg, #000000 0%, #212529 100%);
    min-height: 400px;
}

.page-header {
    background: linear-gradient(135deg, #000000 0%, #212529 100%);
}

.btn-danger {
    background-color: var(--zk-red);
    border-color: var(--zk-red);
    transition: all 0.3s ease;
}

.btn-danger:hover {
    background-color: #bb2d3b;
    border-color: #bb2d3b;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(220, 53, 69, 0.3);
}

.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.text-danger {
    color: var(--zk-red) !important;
}

.social-links a {
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--zk-red) !important;
}

.bg-danger {
    background-color: var(--zk-red) !important;
}

.border-danger {
    border-color: var(--zk-red) !important;
}

footer {
    background: linear-gradient(135deg, #000000 0%, #212529 100%);
}

@media (max-width: 768px) {
    .hero-section {
        min-height: 300px;
    }

    .display-4 {
        font-size: 2rem;
    }

    .navbar-brand {
        font-size: 1rem;
    }
    
    .navbar-brand span {
        display: none;
    }
    
    .nav-link {
        font-size: 0.9rem;
        padding: 0.5rem 0.75rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 0.9rem;
    }
    
    .navbar-brand img {
        height: 35px;
    }
}

.table-hover tbody tr:hover {
    background-color: rgba(220, 53, 69, 0.05);
}

.nav-link {
    transition: color 0.3s ease;
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.3px;
    padding: 0.5rem 0.5rem;
}

.nav-link:hover {
    color: var(--zk-white) !important;
}

.nav-link.active {
    color: var(--zk-red) !important;
    font-weight: 600;
}

.nav-link.active:hover {
    color: var(--zk-red) !important;
}

/* Dropdown menu styling */
.navbar-nav .dropdown-menu {
    background-color: var(--zk-gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 0;
}

.navbar-nav .dropdown-menu .dropdown-item {
    color: rgba(255, 255, 255, 0.75);
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

.navbar-nav .dropdown-menu .dropdown-item:hover {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--zk-white);
}

.navbar-nav .dropdown-menu .dropdown-item:focus {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--zk-white);
}