@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=Instrument+Sans:wght@400;500;600&display=swap");

:root {
    --bg: #f6f4ef;
    --paper: #fffdf8;
    --ink: #1d2833;
    --muted: #434280;
    --line: #d7dde2;
    --accent: #4c3e9b;
    --accent-soft: #5d53971f;
    --shadow: 0 10px 30px rgba(60, 67, 120, 0.155);
    --radius: 16px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Instrument Sans", "Segoe UI", sans-serif;
    color: var(--ink);
    background: linear-gradient(165deg, var(--bg) 0%, #bdbbca 55%, #2a235e 100%);
    line-height: 1.6;
}

h1,
h2,
h3 {
    font-family: "Fraunces", Georgia, serif;
    line-height: 1.2;
    letter-spacing: 0;
    margin-top: 0;
}

a {
    color: var(--accent);
}

.content {
    max-width: 760px;
    margin: 0 auto;
    width: 100%;
}

.background-shape {
    position: fixed;
    pointer-events: none;
    z-index: -1;
    filter: blur(40px);
}

.shape-a {
    top: -40px;
    left: -80px;
    width: 360px;
    height: 300px;
    background: rgba(95, 89, 151, 0.425);
}

.shape-b {
    right: -100px;
    bottom: -90px;
    width: 420px;
    height: 360px;
    background: rgba(81, 81, 145, 0.301);
}

.site-header {
    position: sticky;
    top: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: rgba(203, 206, 223, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(124, 140, 150, 0.2);
    z-index: 20;
}

.brand {
    font-family: "Fraunces", Georgia, serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
}

.site-nav {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.site-nav a {
    color: var(--muted);
    font-size: 0.95rem;
    text-decoration: none;
}

.site-nav a:hover {
    color: var(--accent);
}

.container {
    max-width: 920px;
    margin: 0 auto;
    padding: 1.5rem;
}

.section {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 1.25rem;
    padding: 1.25rem;
    opacity: 0;
    transform: translateY(10px);
    animation: rise 0.55s ease forwards;
}

.section:nth-of-type(2) {
    animation-delay: 0.08s;
}

.section:nth-of-type(3) {
    animation-delay: 0.14s;
}

.section:nth-of-type(4) {
    animation-delay: 0.2s;
}

.section:nth-of-type(5) {
    animation-delay: 0.26s;
}

.section:nth-of-type(6) {
    animation-delay: 0.32s;
}

@keyframes rise {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero .section {
    width: 100%;
}

.hero h1 {
    font-size: clamp(1.75rem, 3.2vw, 2.5rem);
    margin-bottom: 0.7rem;
}

.hero-content {
    width: 100%;
}

#abstract {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 40px;
}

#abstract .media-slot {
    max-width: 520px;
    margin: 1.25rem auto;
}

#abstract .media-slot img {
    border-radius: 8px;
}

.eyebrow {
    margin: 0 0 0.7rem;
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.authors {
    margin: 0 0 0.35rem;
    color: var(--ink);
    font-weight: 500;
    font-size: 0.7rem;
}

.authors a {
    color: var(--ink);
    text-decoration: none;
}

.authors a:hover {
    color: var(--accent);
}

.affiliations {
    margin: 0 0 1.1rem;
    color: var(--muted);
    font-size: 0.65rem;
}

.author-note {
    margin: -0.45rem 0 1.1rem;
    color: var(--muted);
    font-size: 0.6rem;
}

.author-note a {
    color: inherit;
}

.author-note a:hover {
    color: var(--accent);
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-bottom: 1.15rem;
}

.btn {
    text-decoration: none;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0.45rem 0.85rem;
    color: var(--ink);
    background: #fff;
    font-size: 0.92rem;
}

.btn:hover {
    border-color: #574b72;
}

.btn-primary {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: #6f668f;
}

.hero-intro,
.section-copy {
    margin: 0 0 0.9rem;
    color: var(--muted);
    font-size: 0.9rem;
    text-align: justify;
}

.grid {
    display: grid;
    gap: 0.9rem;
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.span-2 {
    grid-column: span 2;
}

.media-slot {
    max-width: 700px;
    margin: 1rem auto;
}

figure:not(.media-slot) {
    margin: 1.25rem auto;
    text-align: center;
}

figure:not(.media-slot) img {
    display: block;
    width: min(100%, 480px);
    height: auto;
    margin: 0 auto;
}

.media-slot img,
.media-slot video {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
}

.media-slot {
    width: 100%;
    max-width: none;
    margin: 0;
}

.media-slot a {
    display: block;
}

.media-slot figcaption {
    font-size: 0.75rem;
    color: var(--muted);
    padding: 0.6rem 0.75rem;
    border-top: 1px solid var(--line);
    text-align: justify;
}

.video-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
}

.video-wrapper iframe {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 0;
}

.table-container {
    width: min(100%, 640px);
    margin: 1.5rem auto;
    overflow-x: auto;
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(76, 61, 109, 0.06);
}

.table-container table {
    width: 100%;
    border-collapse: collapse;
    min-width: 420px;
}

.table-container thead {
    background: var(--accent-soft);
}

.table-container th,
.table-container td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--line);
    font-size: 0.92rem;
}

.table-container th {
    color: #413054;
    font-weight: 600;
    text-align: center;
}

.table-container th:first-child,
.table-container td:first-child {
    text-align: left;
    white-space: nowrap;
}

.table-container td:not(:first-child) {
    text-align: center;
}

.table-container tbody tr:nth-child(even) {
    background: rgba(236, 216, 242, 0.24);
}

.table-container tbody tr:last-child td {
    border-bottom: 0;
}

pre {
    margin: 0;
    background: #1c182b;
    color: #eef4f8;
    border-radius: 10px;
    padding: 0.9rem;
    overflow-x: auto;
}

code {
    font-family: "SFMono-Regular", Menlo, Monaco, Consolas, monospace;
    font-size: 0.9rem;
}

.footer-note {
    margin: 1.5rem 0 2rem;
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
    color: #eef4f8;
}

.footer-note a,
.footer-note a:visited,
.footer-note a:hover {
    color: #eef4f8;
    text-decoration-color: rgba(255, 255, 255, 0.7);
}


@media (max-width: 900px) {
    .grid-2 {
        grid-template-columns: 1fr;
    }

    .span-2 {
        grid-column: auto;
    }
}

@media (max-width: 640px) {
    #abstract {
        flex-direction: column;
        align-items: center;
    }

    .container {
        padding: 0.8rem;
    }

    .section {
        padding: 1rem;
    }

    .site-header {
        padding: 0.75rem 0.9rem;
    }

    .site-nav {
        gap: 0.6rem;
    }
}