* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Helvetica, Helvetica Neue, Arial, sans-serif;
    background: linear-gradient(135deg, #0a1628 0%, #1a2332 100%);
    color: #2c3e50;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: #f8f9fa;
    min-height: 100vh;
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.3);
}

header {
    background: linear-gradient(135deg, #1a3a52 0%, #2c5f7f 100%);
    padding: 2rem;
    border-bottom: 3px solid #34495e;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: nowrap;
}

.header-logo {
    height: 100px;
    width: auto;
    flex-shrink: 0;
}

header h1 {
    color: #ecf0f1;
    font-size: 2.5rem;
    font-weight: 500;
    letter-spacing: 1px;
    margin: 0;
}

section {
    padding: 2rem;
}

.intro p {
    font-size: 1.1rem;
    color: #2c3e50;
    line-height: 1.8;
}

section h2 {
    color: #1a3a52;
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 400;
    border-bottom: 2px solid #34495e;
    padding-bottom: 0.5rem;
}

/* For sections that need the light background */
section.highlight {
    background-color: #e8edf1;
    border-radius: 8px;
    margin: 2rem;
}

section p {
    color: #2c3e50;
    font-size: 1.05rem;
    line-height: 1.8;
}

.dataset {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 2rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

.dataset:hover {
    box-shadow: 0 4px 16px rgba(26, 58, 82, 0.2);
}

.dataset-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 120px;
    width: auto;
    object-fit: contain;
}

.placeholder-logo {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #2c5f7f 0%, #1a3a52 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ecf0f1;
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.placeholder-logo:has(img) {
    background: transparent;
}


.placeholder-logo img,
.placeholder-logo-small img {
    width: auto;
    height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.dataset-content h3 {
    color: #1a3a52;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.dataset-content p {
    color: #34495e;
    font-size: 1rem;
    line-height: 1.7;
}

.dataset-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.dataset-link:hover .dataset {
    box-shadow: 0 4px 16px rgba(26, 58, 82, 0.3);
}

.dataset-link:visited {
    color: inherit;
}

/* Link styling */

a {
    color: #2c5f7f;
    text-decoration: none;
    /* border-bottom: 1px solid transparent; */
    border-bottom: 1px solid #2c5f7f;
    transition: border-bottom-color 0.3s ease, color 0.3s ease;
}

a:hover {
    color: #1a3a52;
    border-bottom-color: #2c5f7f;
}

a:visited {
    color: #34495e;
}

/* Keep your existing .dataset-link styles to override these defaults */
.dataset-link {
    color: inherit;
    border-bottom: none;
}

.dataset-link:visited {
    color: inherit;
}



footer {
    /* background-color: #2c3e50; */
    padding: 2rem;
    margin-top: 3rem;
}

.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.partner-logo {
    height: 80px;
    width: auto;
    object-fit: contain;
}

.placeholder-logo-small {
    width: 100px;
    height: 80px;
    background-color: #ecf0f1;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2c3e50;
    font-size: 0.85rem;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

@media (max-width: 768px) {
    .dataset {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .placeholder-logo {
        width: 100px;
        height: 100px;
    }

    header h1 {
        font-size: 2rem;
    }

    .flagship-datasets h2,
    .additional-datasets h2 {
        font-size: 1.5rem;
    }
}