:root {
    --bg: #ffffff;
    --text: #1a1a1a;
    --text-secondary: #555;
    --accent: #4a6cf7;
    --border: #e5e7eb;
    --card-bg: #fafafa;
}

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

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    font-size: 16px;
}

h1,
h2,
h3 {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ─── Header ─── */
header {
    padding: 5rem 0 3rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

header h1 {
    font-size: 2.65rem;
    line-height: 1.08;
    max-width: 920px;
    margin: 0 auto 0.65rem;
    color: var(--text);
}

.subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 0.8rem;
}

.authors {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0.45rem auto 0.35rem;
}

.authors sup,
.affiliations sup,
.author-notes sup {
    font-size: 0.72em;
    vertical-align: super;
}

.affiliations,
.author-notes {
    color: var(--text-secondary);
    max-width: 900px;
    margin: 0 auto;
}

.affiliations {
    font-size: 0.96rem;
    line-height: 1.55;
}

.author-notes {
    font-size: 0.92rem;
    margin-top: 0.15rem;
    margin-bottom: 1.5rem;
}

.hero-video {
    max-width: 560px;
    margin: 0 auto 1.5rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    background: #000;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.hero-video video {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    background: #000;
}

.links {
    display: flex;
    gap: 0.8rem;
    justify-content: center;
    flex-wrap: wrap;
}

.resource-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.55rem;
    max-width: 860px;
    margin: 1.8rem auto 0;
}

.resource-pill {
    display: inline-flex;
    align-items: stretch;
    overflow: hidden;
    border-radius: 6px;
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.resource-pill:hover {
    transform: translateY(-2px);
    box-shadow: 0 7px 18px rgba(0, 0, 0, 0.16);
}

.resource-pill.resource-disabled {
    cursor: default;
}

.resource-pill.resource-disabled:hover {
    transform: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.resource-prefix,
.resource-value {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0.55rem 0.75rem;
    white-space: nowrap;
}

.resource-prefix {
    background: #4a4a4a;
}

.resource-red .resource-value {
    background: #b31b1b;
}

.resource-green .resource-value {
    background: #7dbd00;
}

.resource-indigo .resource-value {
    background: #4f6bdc;
}

.resource-gold .resource-value {
    background: #c9a600;
}

.resource-blue .resource-value {
    background: #0084c8;
}

.resource-slate .resource-value {
    background: #697386;
}

.btn {
    padding: 0.55rem 1.4rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.btn.primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* ─── Sections ─── */
section {
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
}

section:last-child {
    border-bottom: none;
}

section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
    text-align: center;
}

/* ─── Teaser ─── */
.teaser-img {
    width: 100%;
    max-width: 900px;
    display: block;
    margin: 2rem auto 0.5rem;
    border-radius: 8px;
}

.caption {
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* ─── Abstract ─── */
#abstract p {
    max-width: 780px;
    margin: 0 auto;
    text-align: justify;
    color: #333;
}

/* ─── Video Grid ─── */
.category {
    margin-bottom: 2.5rem;
}

.category h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.video-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: box-shadow 0.2s ease;
}

.video-item:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
}

.video-item video {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    display: block;
    background: #f0f0f0;
}

.video-item p {
    padding: 0.7rem 0.8rem;
    font-size: 0.85rem;
    text-align: center;
    color: var(--text-secondary);
}

/* ─── Task Details ─── */
.section-intro {
    max-width: 760px;
    margin: 0 auto 1.3rem;
    text-align: center;
    color: var(--text-secondary);
}

.task-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: #fff;
}

.task-table {
    width: 100%;
    min-width: 920px;
    border-collapse: collapse;
    font-size: 0.83rem;
    line-height: 1.45;
}

.task-table th,
.task-table td {
    padding: 0.7rem 0.75rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
}

.task-table th {
    background: #f6f7fb;
    color: var(--text);
    font-weight: 700;
    white-space: nowrap;
}

.task-table tbody tr:last-child td {
    border-bottom: none;
}

.task-table tbody tr:not(.suite-row):nth-child(odd) {
    background: #fcfcfd;
}

.suite-row td {
    background: #eef2ff;
    color: #2d3a75;
    font-weight: 700;
    letter-spacing: 0;
}

.memory-type {
    color: var(--accent);
    font-weight: 700;
    white-space: nowrap;
}

.steps {
    text-align: right;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* ─── Method ─── */
.method-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.method-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
}

.method-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.method-card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

/* ─── Results ─── */
.results-content {
    display: flex;
    gap: 2rem;
    align-items: center;
    max-width: 900px;
    margin: 0 auto;
}

.results-text {
    flex: 1;
}

.results-text p {
    color: #333;
}

/* ─── BibTeX ─── */
pre {
    background: #f5f5f5;
    padding: 1.2rem 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 0.85rem;
    max-width: 700px;
    margin: 0 auto;
    border: 1px solid var(--border);
}

code {
    color: #333;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

/* ─── Footer ─── */
footer {
    text-align: center;
    padding: 2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

footer a {
    color: var(--text-secondary);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
        max-width: 100%;
    }

    .video-grid {
        grid-template-columns: 1fr;
    }

    .resource-links {
        gap: 0.45rem;
        max-width: 420px;
    }

    .resource-pill {
        font-size: 0.86rem;
    }

    .resource-prefix,
    .resource-value {
        min-height: 36px;
        padding: 0.5rem 0.62rem;
    }

    .method-grid {
        grid-template-columns: 1fr;
    }

    .results-content {
        flex-direction: column;
    }

}