body {
    background-color: #f5f5f5;
    font-family: 'Open Sans', sans-serif;
}

.page-header {
    background: linear-gradient(135deg, #1a3a5c 0%, #2c5f8a 100%);
    color: #fff;
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.page-header h1 {
    font-family: 'Oswald', sans-serif;
    font-size: 1.75rem;
    margin: 0;
    letter-spacing: 0.5px;
}

.search-card {
    background: #fff;
    border: 1px solid #dfdfdf;
    border-radius: 4px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.search-card label {
    font-weight: 600;
    color: #333;
    margin-bottom: 0.4rem;
}

.results-card {
    border: 1px solid #dfdfdf;
    border-radius: 4px;
    background: #fff;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.results-card .list-group-item {
    border-left: none;
    border-right: none;
    padding: 0.75rem 1.25rem;
}

.results-card .list-group-item:first-child {
    border-top: none;
}

.results-card .list-group-item i {
    color: #2c5f8a;
    margin-right: 0.5rem;
}

.results-card .certificate-image {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

#message-area {
    margin-bottom: 1.5rem;
}

#loading {
    text-align: center;
    padding: 2rem;
    color: #666;
}

@media (max-width: 767px) {
    .search-card .btn-search {
        width: 100%;
        margin-top: 0.5rem;
    }
}