:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
}

body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.hero-section {
    background: linear-gradient(135deg, #0d6efd 0%, #0099ff 100%);
    color: white;
    padding: 80px 0;
    border-radius: 0 0 50px 50px;
    margin-bottom: 40px;
}

.search-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    padding: 30px;
    margin-top: -60px;
}

.cert-result-card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    overflow: hidden;
}

.status-valid {
    background-color: #198754;
    color: white;
}

.status-expired {
    background-color: #ffc107;
    color: black;
}

.status-revoked {
    background-color: #dc3545;
    color: white;
}

.watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-45deg);
    font-size: 8rem;
    font-weight: bold;
    opacity: 0.1;
    z-index: 0;
    pointer-events: none;
}