/* ============================================
   PROJECT PAGE — single-column academic layout
   Extends style.css variables and base styles
   ============================================ */

/* Override body layout from style.css */
body.project-body {
    display: block;
    background-color: var(--c-bg);
    background-image: none;
}

/* --- Top navigation --- */
.project-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 250, 247, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border);
}

.project-nav__inner {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
}

.project-nav__back {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--c-text);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    transition: color 0.2s;
}

.project-nav__back:hover {
    color: var(--c-accent);
}

.project-nav__links {
    display: flex;
    gap: var(--space-lg);
}

.project-nav__links a {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--c-text-secondary);
    transition: color 0.2s;
}

.project-nav__links a:hover {
    color: var(--c-accent);
}

/* --- Main content --- */
.project-main {
    max-width: 820px;
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

/* --- Hero --- */
.project-hero {
    text-align: center;
    padding: var(--space-xl) 0 var(--space-lg);
    border-bottom: 1px solid var(--c-border);
    margin-bottom: var(--space-xl);
}

.project-hero__venue {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--c-accent);
    letter-spacing: 0.01em;
    margin-bottom: var(--space-md);
}

.project-hero__title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: var(--c-text);
    margin-bottom: var(--space-lg);
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.project-hero__authors {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    color: var(--c-text-secondary);
    margin-bottom: var(--space-xs);
}

.project-hero__affiliations {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    color: var(--c-text-secondary);
    margin-bottom: var(--space-lg);
}

.project-hero__links {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--c-text);
    background: var(--c-surface);
    border: 1.5px solid var(--c-border);
    border-radius: 100px;
    padding: 0.4rem 1rem;
    transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.project-link:hover {
    color: var(--c-accent);
    border-color: var(--c-accent);
    box-shadow: var(--shadow-md);
}

/* --- Teaser --- */
.project-teaser {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.project-teaser__img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--c-border);
    display: block;
    margin: 0 auto var(--space-sm);
}

.project-teaser__caption {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    color: var(--c-text-secondary);
}

/* --- Sections --- */
.project-section {
    margin-bottom: var(--space-xl);
    padding-top: var(--space-lg);
}

.project-section__title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--c-text-secondary);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.project-section__title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--c-border);
}

.project-section p {
    font-size: 1.0625rem;
    line-height: 1.75;
    margin-bottom: var(--space-md);
}

.project-section p:last-child {
    margin-bottom: 0;
}

/* --- Abstract --- */
.project-abstract {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: var(--c-text);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border-left: 3px solid var(--c-accent);
}

/* --- Figures --- */
.project-figure {
    margin: var(--space-lg) 0;
    text-align: center;
}

.project-figure__overlay {
    position: relative;
    display: block;
    width: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--c-border);
    margin: 0 auto var(--space-sm);
}

.project-figure__overlay img {
    display: block;
    width: 100%;
}

.project-figure__overlay img:last-child {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-figure img {
    width: 100%;
    border-radius: var(--radius-lg);
    border: 1px solid var(--c-border);
    display: block;
    margin: 0 auto var(--space-sm);
}

.project-figure__caption {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    color: var(--c-text-secondary);
    line-height: 1.5;
}

/* --- Table --- */
.project-table-wrap {
    overflow-x: auto;
    margin: var(--space-lg) 0;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
}

.project-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-display);
    font-size: 0.875rem;
}

.project-table th {
    padding: 0.625rem 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--c-text-secondary);
    background: var(--c-sidebar);
    border-bottom: 1px solid var(--c-border);
}

.project-table td {
    padding: 0.625rem 1rem;
    border-bottom: 1px solid var(--c-border);
    color: var(--c-text);
}

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

.project-table__ours td {
    background: var(--c-accent-soft);
}

/* --- Video --- */
.project-video {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 */
    height: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--c-border);
}

.project-video iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* --- Video link (when embedding is disabled) --- */
.project-video-link {
    display: block;
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--c-border);
    color: inherit;
    text-decoration: none;
}

.project-video-link img {
    display: block;
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    transition: brightness 0.2s;
}

.project-video-link:hover img {
    brightness: 0.85;
}

.project-video-link:hover img {
    filter: brightness(0.85);
}

.project-video-link__play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.25);
    transition: background 0.2s;
}

.project-video-link:hover .project-video-link__play {
    background: rgba(0, 0, 0, 0.4);
}

.project-video-link__play svg {
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.4));
    transition: transform 0.2s;
}

.project-video-link:hover .project-video-link__play svg {
    transform: scale(1.1);
}

.project-video-link__label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-sm) var(--space-md);
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
    font-family: var(--font-display);
    font-size: 0.8125rem;
    color: white;
}

/* --- BibTeX --- */
.project-bibtex-wrap {
    position: relative;
}

.bibtex-copy {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--c-text-secondary);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 0.25rem 0.625rem;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.bibtex-copy:hover {
    color: var(--c-accent);
    border-color: var(--c-accent);
}

.project-bibtex {
    background: var(--c-sidebar);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    overflow-x: auto;
    margin: 0;
}

.project-bibtex code {
    font-family: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
    font-size: 0.8125rem;
    line-height: 1.7;
    color: var(--c-text);
}

/* --- Footer --- */
.project-footer {
    max-width: 820px;
    margin: 0 auto;
    padding: var(--space-lg);
    border-top: 1px solid var(--c-border);
    text-align: center;
}

.project-footer p {
    font-family: var(--font-display);
    font-size: 0.75rem;
    color: var(--c-text-secondary);
}

/* --- Responsive --- */
@media (max-width: 640px) {
    .project-hero__title {
        font-size: 1.5rem;
    }

    .project-nav__links {
        display: none;
    }

    .project-main {
        padding: var(--space-lg) var(--space-md);
    }
}

/* --- Saliency overlay animation --- */
@keyframes sal-pulse {

    0%,
    100% {
        opacity: 0.5;
    }

    50% {
        opacity: 0.0;
    }
}

.sal-overlay {
    animation: sal-pulse 2s ease-in-out infinite;
}