:root {
    --verlab-red: #E31D2D;
    --verlab-black: #1A1A1A;
    --light-gray: #f9f9f9;
    --border-gray: #ececec;
}

body {
    margin: 0;
    font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: #ffffff;
    color: var(--verlab-black);
    line-height: 1.6;
}

/* HEADER & LOGO */
header {
    background: #ffffff;
    padding: 60px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-gray);
}

.logo {
    max-width: 210px;
    margin-bottom: 25px;
}

header h1 {
    font-size: 3rem;
    margin: 10px 0;
    font-weight: 800;
    color: var(--verlab-black);
}

header p {
    max-width: 700px;
    margin: auto;
    font-size: 1.2rem;
    color: #555;
}

/* AUTHORS SECTION */
.authors {
    margin: 25px auto;
    max-width: 700px;
    font-size: 1rem;
    color: #555;
}

.authors p {
    margin: 10px 0;
}

.author {
    font-weight: 500;
}

.author a {
    color: var(--verlab-black);
    text-decoration: none;
    transition: 0.2s;
}

.author a:hover {
    color: var(--verlab-red);
    text-decoration: underline;
}

.affiliations {
    font-size: 0.95rem;
    color: #888;
    line-height: 1.8;
}

.affiliations a {
    color: var(--verlab-red);
    text-decoration: none;
    transition: 0.2s;
}

.affiliations a:hover {
    text-decoration: underline;
    color: var(--verlab-black);
}

/* BUTTONS */
.links {
    margin-top: 35px;
}

.links a {
    margin: 8px;
    padding: 12px 24px;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    color: white;
    background: var(--verlab-black);
    display: inline-block;
    transition: 0.3s;
}

.links a:hover {
    background: var(--verlab-red);
}

/* GRID & CARDS */
section {
    max-width: 1100px;
    margin: auto;
    padding: 60px 20px;
}

h2 {
    color: var(--verlab-black);
    border-left: 5px solid var(--verlab-red);
    padding-left: 15px;
    margin-bottom: 30px;
}

h3.section-title {
    margin-top: 40px;
    color: var(--verlab-black);
    border-left: 3px solid var(--verlab-red);
    padding-left: 12px;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    background: var(--light-gray);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
}

.stat h3 {
    color: var(--verlab-red);
    font-size: 2.2rem;
    margin: 0;
}

.downloads {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.access-notice {
    background-color: #fef3cd;
    border: 2px solid #ffc107;
    border-left: 5px solid var(--verlab-red);
    padding: 18px 20px;
    border-radius: 6px;
    margin-bottom: 30px;
    color: #333;
}

.access-notice p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.6;
}

.access-notice strong {
    color: var(--verlab-red);
}

.card {
    border: 1px solid var(--border-gray);
    padding: 25px;
    border-radius: 10px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    border-color: var(--verlab-red);
}

.btn-download {
    display: inline-block;
    margin-top: 15px;
    color: var(--verlab-red);
    text-decoration: none;
    font-weight: bold;
    border: 1px solid var(--verlab-red);
    padding: 8px 16px;
    border-radius: 4px;
    transition: 0.3s;
}

.btn-download:hover {
    background: var(--verlab-red);
    color: white;
}

.file-size {
    font-size: 0.95rem;
    color: #888;
    margin-top: 12px;
    font-weight: 500;
}

.file-size .size-value {
    color: var(--verlab-red);
    font-weight: 700;
}

.download-snippet {
    margin-top: 14px;
    background: #000000;
    color: #ffffff;
    border-radius: 10px;
    padding: 12px;
    font-size: 0.82rem;
    overflow-x: auto;
}

.download-snippet pre {
    margin: 0;
    background: #000000;
    color: #ffffff;
}

.download-snippet code {
    white-space: pre-wrap;
    word-break: break-word;
    display: block;
    line-height: 1.4;
    background: #000000;
    color: #ffffff;
}

.btn-copy {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
    padding: 8px 12px;
    background: var(--verlab-red);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}

.btn-copy:hover {
    background: #c41a24;
    transform: scale(1.05);
}

.btn-copy:active {
    transform: scale(0.98);
}

.btn-copy i {
    font-size: 0.9rem;
}


/* CITATION SECTION */
.citation-section {
    background: var(--light-gray);
    border-top: 1px solid var(--border-gray);
}


.citation-section .btn-copy {
    display: inline-flex;
}

/* FOOTER */
footer {
    background: var(--verlab-black);
    color: white;
    text-align: center;
    padding: 40px 20px;
    margin-top: 60px;
}

pre {
    background: #f4f4f4;
    padding: 20px;
    border-radius: 6px;
    overflow-x: auto;
}