@font-face {
font-family: "Scala Sans Pro";
src: url("assets/Scala Sans/scalasanspro-regular.ttf") format("truetype");
font-weight: 400;
font-style: normal;
}

@font-face {
font-family: "Scala Sans Pro";
src: url("assets/Scala Sans/scalasanspro-italic.ttf") format("truetype");
font-weight: 400;
font-style: italic;
}

@font-face {
font-family: "Scala Sans Pro";
src: url("assets/Scala Sans/scalasanspro-bold.ttf") format("truetype");
font-weight: 700;
font-style: normal;
}

@font-face {
font-family: "Scala Sans Pro";
src: url("assets/Scala Sans/scalasanspro-bolditalic.ttf") format("truetype");
font-weight: 700;
font-style: italic;
}

:root {
--bg: #fff;
--text: #333;
--text-muted: #666;
--border: #e0e0e0;
--surface: #f5f5f5;
--btn-bg: #333;
--footer-bg: #f0f0f0;
--max-width: 860px;
--space-xs: 0.5rem;
--space-sm: 1rem;
--space-md: 1.5rem;
--space-lg: 2rem;
--space-xl: 3rem;
--radius: 8px;
--font-sans: "Scala Sans Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
--font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, monospace;
}

*,
*::before,
*::after {
box-sizing: border-box;
}

html {
scrollbar-width: none;
-ms-overflow-style: none;
}

html::-webkit-scrollbar {
display: none;
}

body {
margin: 0;
font-family: var(--font-sans);
font-size: 1rem;
line-height: 1.6;
color: var(--text);
background: var(--bg);
}

.container {
max-width: var(--max-width);
margin: 0 auto;
padding: var(--space-lg) var(--space-md);
}

.hero {
text-align: center;
margin-bottom: var(--space-md);
}

.hero__title {
margin: 0 0 var(--space-xs);
font-size: clamp(1.4rem, 3.5vw, 1.75rem);
font-weight: 700;
letter-spacing: 0.02em;
}

.hero__subtitle {
margin: 0;
font-size: 1.125rem;
color: var(--text-muted);
font-weight: 400;
}

.authors {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: var(--space-sm);
margin-bottom: var(--space-md);
}

.author {
display: flex;
flex-direction: column;
align-items: center;
text-align: center;
min-width: 72px;
}

.author__avatar {
width: 56px;
height: 56px;
border-radius: 50%;
object-fit: cover;
margin-bottom: var(--space-xs);
}

.author__name {
font-weight: 600;
font-size: 0.9rem;
}

.author__affiliation {
font-size: 0.8rem;
color: var(--text-muted);
}

.actions {
display: flex;
flex-wrap: wrap;
justify-content: center;
gap: var(--space-sm);
margin-bottom: var(--space-xl);
}

.btn {
display: inline-flex;
align-items: center;
gap: var(--space-xs);
padding: 0.5rem 0.75rem;
font-family: var(--font-sans);
font-size: 0.875rem;
font-weight: 500;
text-decoration: none;
border-radius: var(--radius);
border: none;
cursor: pointer;
transition: opacity 0.15s ease;
}

.btn:hover {
opacity: 0.9;
}

.btn:focus-visible {
outline: 2px solid var(--text);
outline-offset: 2px;
}

.btn__icon {
width: 1rem;
height: 1rem;
flex-shrink: 0;
}

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

.btn--secondary {
background: var(--btn-bg);
color: #fff;
}

/* Abstract */
.abstract {
margin-bottom: var(--space-xl);
}

.section-title {
margin: 0 0 var(--space-xs);
font-size: 1.25rem;
font-weight: 700;
}

.abstract__text {
margin: 0;
}

.abstract__chart {
margin: var(--space-lg) 0 0;
text-align: center;
}

.abstract__chart-img {
display: block;
width: 100%;
max-width: 560px;
height: auto;
margin: 0 auto;
border-radius: var(--radius);
}

.video-demo {
margin-bottom: var(--space-xl);
}

.video-demo__intro {
margin: 0 0 var(--space-md);
}

.video-placeholder {
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
aspect-ratio: 16 / 9;
display: flex;
align-items: center;
justify-content: center;
margin-bottom: var(--space-md);
}

.video-placeholder__inner {
display: flex;
flex-direction: column;
align-items: center;
gap: var(--space-xs);
color: var(--text-muted);
font-size: 0.9rem;
}

.video-placeholder__label {
font-weight: 600;
}

.video-demo__btn {
margin-top: var(--space-sm);
}

/* BibTeX */
.bibtex {
margin-bottom: var(--space-xl);
}

.bibtex__block {
background: var(--surface);
border: 1px solid var(--border);
border-radius: var(--radius);
padding: var(--space-md);
overflow-x: auto;
scrollbar-width: none;
-ms-overflow-style: none;
}

.bibtex__block::-webkit-scrollbar {
display: none;
}

.bibtex__content {
margin: 0;
font-family: var(--font-mono);
font-size: 0.85rem;
line-height: 1.5;
color: var(--text);
white-space: pre;
}

.footer {
padding: var(--space-md) var(--space-lg);
background: var(--footer-bg);
margin-top: var(--space-xl);
}

.footer__text {
margin: 0;
font-size: 0.875rem;
color: var(--text-muted);
text-align: center;
}

.footer__link {
color: var(--text);
text-decoration: underline;
}

.footer__link:hover {
opacity: 0.8;
}

@media (max-width: 640px) {
.authors {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
    justify-items: center;
}

.author {
    width: 100%;
    min-width: 0;
}

.author__avatar {
    width: 44px;
    height: 44px;
    margin-bottom: 0.25rem;
}

.author__name {
    font-size: 0.7rem;
    line-height: 1.2;
}

.author__affiliation {
    font-size: 0.6rem;
    line-height: 1.2;
}

.actions {
    flex-direction: column;
    align-items: stretch;
}

.btn {
    justify-content: center;
}
}