/* ============================================================
 * Ran Yi homepage — styles.css
 * Palette + components inherited from the master branch design,
 * adapted to the data-driven template + renderer.
 * ============================================================ */

:root {
    color-scheme: light;
    --bg: #f7f8f4;
    --surface: #ffffff;
    --surface-muted: #eef4f1;
    --ink: #1c2528;
    --muted: #647174;
    --line: #d9e0dc;
    --accent: #0b6f69;
    --accent-strong: #084f4a;
    --accent-soft: #dff0ec;
    --warm: #c06d32;
    --warn: #b0443d;
    --shadow: 0 18px 45px rgba(35, 53, 54, 0.10);
    --radius: 8px;
    --max-width: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.62;
    text-rendering: optimizeLegibility;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: url("homeback.jpg") top center / cover no-repeat;
    opacity: 0.16;
}

a {
    color: var(--accent);
    text-decoration: none;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--accent-strong);
    text-decoration: underline;
}

img { max-width: 100%; height: auto; border: 0; }

p { margin: 0 0 1rem; }

ul { margin: 0; padding: 0; }
li { margin: 0; }

strong { font-weight: 700; }

/* ---------- layout ---------------------------------------- */

.site-header,
main,
.site-footer {
    width: min(var(--max-width), calc(100% - 40px));
    margin: 0 auto;
}

.site-header { padding: 0; }

/* ---------- top nav --------------------------------------- */

.top-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: min(var(--max-width), calc(100% - 40px));
    min-height: 58px;
    margin: 0 auto;
    padding: 10px 0;
    background: rgba(247, 248, 244, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(217, 224, 220, 0.82);
}

.top-nav::before {
    content: "";
    position: absolute;
    inset: 0 calc((100vw - 100%) / -2);
    z-index: -1;
    background: rgba(247, 248, 244, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(217, 224, 220, 0.82);
}

.brand-link {
    color: var(--ink);
    font-weight: 800;
    font-size: 1.03rem;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.nav-links a,
.year-nav a {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 6px 10px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    color: var(--ink);
    font-size: 0.91rem;
    line-height: 1.2;
}

.nav-links a:hover,
.year-nav a:hover {
    border-color: var(--line);
    background: var(--surface);
    text-decoration: none;
}

/* ---------- hero ------------------------------------------ */

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 28px;
    align-items: center;
    min-height: 220px;
    padding: 14px 0 18px;
    border-bottom: 1px solid var(--line);
}

.hero-copy { max-width: 760px; }

.eyebrow {
    margin: 0 0 10px;
    color: var(--warm);
    font-size: 0.88rem;
    font-weight: 800;
}

h1, h2, h3 {
    margin: 0;
    color: var(--ink);
    line-height: 1.12;
}

h1 {
    font-size: clamp(1.8rem, 4vw, 2.65rem);
    font-weight: 850;
}

h1 span {
    display: inline-block;
    color: var(--accent);
    font-weight: 750;
}

h2 {
    font-size: clamp(1.45rem, 3vw, 2.2rem);
    font-weight: 820;
}

.hero-title {
    margin: 8px 0 0;
    color: var(--accent-strong);
    font-size: clamp(0.98rem, 1.8vw, 1.12rem);
    font-weight: 700;
}

.hero-affiliation {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 0.98rem;
    font-weight: 650;
}

.hero-summary {
    max-width: 720px;
    margin-top: 10px;
    color: #354345;
    font-size: 0.96rem;
}

.contact-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    margin-top: 10px;
    color: var(--muted);
}

.contact-list span,
.contact-list a {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 8px 13px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72);
    color: var(--ink);
    font-weight: 750;
    line-height: 1.2;
}

.button:hover {
    border-color: var(--accent);
    color: var(--accent-strong);
    text-decoration: none;
}

.button.primary {
    border-color: var(--accent);
    background: var(--accent);
    color: #ffffff;
}

.button.primary:hover {
    background: var(--accent-strong);
    color: #ffffff;
}

.portrait-wrap {
    margin: 0;
    justify-self: end;
}

.portrait-wrap img {
    display: block;
    width: 160px;
    aspect-ratio: 11 / 13;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ---------- generic section ------------------------------- */

.section {
    padding: 34px 0;
    border-bottom: 1px solid var(--line);
    scroll-margin-top: 36px;
}

main > .section:first-child { padding-top: 18px; }
main > .section:last-child { padding-bottom: 34vh; }

.section-heading { margin-bottom: 18px; }

.split-section {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 34px;
}

.split-section .section-heading { margin-bottom: 0; }

.section-body { max-width: 820px; }

.lead {
    max-width: 760px;
    color: #354345;
    font-size: 1.08rem;
    margin: 0;
}

/* ---------- metrics --------------------------------------- */

.metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 28px;
}

.metrics div {
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.66);
}

.metrics strong {
    display: block;
    color: var(--accent-strong);
    font-size: 1.65rem;
    line-height: 1;
}

.metrics span {
    display: block;
    margin-top: 7px;
    color: var(--muted);
    font-size: 0.92rem;
}

/* ---------- news / timelines ------------------------------ */

.news-list,
.timeline-list,
.clean-list { list-style: none; }

.news-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    max-height: 430px;
    overflow: auto;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.68);
    scrollbar-width: thin;
    scrollbar-color: rgba(11, 111, 105, 0.42) transparent;
}

.news-list::-webkit-scrollbar { width: 8px; }
.news-list::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(11, 111, 105, 0.36);
}
.news-list::-webkit-scrollbar-track { background: transparent; }

.news-list li {
    position: relative;
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 16px;
    min-width: 0;
    padding: 0 0 0 24px;
    color: #344245;
}

.news-list li::before,
.timeline-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.73em;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
}

.news-list time {
    display: block;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
}

.news-list .highlight {
    display: block;
    padding: 14px 18px;
    border: 1px solid rgba(176, 68, 61, 0.28);
    border-radius: var(--radius);
    background: #fff3ef;
    color: #6d2e28;
    grid-template-columns: 1fr;
    padding-left: 18px;
}

.news-list .highlight::before { display: none; }

.news-list .highlight-tag {
    margin-right: 8px;
    color: var(--warn);
    font-weight: 800;
}

/* ---------- tag list (interests) -------------------------- */

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
    list-style: none;
}

.tag-list li {
    display: inline-flex;
    align-items: center;
    min-height: 38px;
    padding: 8px 13px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    color: #344245;
    font-weight: 700;
}

/* ---------- accent (openings) ----------------------------- */

.accent-section {
    padding: 26px 24px;
    border: 1px solid rgba(11, 111, 105, 0.22);
    border-radius: var(--radius);
    background: var(--accent-soft);
    box-shadow: 0 14px 34px rgba(11, 111, 105, 0.08);
}

.opening-content { max-width: 900px; }

/* ---------- publications ---------------------------------- */

.publications-section { border-bottom: 1px solid var(--line); }

.year-nav {
    position: sticky;
    top: 58px;
    z-index: 90;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: -4px 0 24px;
    padding: 10px 0;
    background: rgba(247, 248, 244, 0.92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(217, 224, 220, 0.82);
}

.year-nav a {
    border-color: var(--line);
    background: rgba(255, 255, 255, 0.74);
    color: var(--accent-strong);
    font-weight: 760;
}

.publication-meta {
    margin-bottom: 18px;
    color: var(--muted);
    font-size: 0.92rem;
}

.publication-section {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin: 34px 0 14px;
}

.publication-section:first-of-type { margin-top: 10px; }

.publication-section h3 {
    font-size: 1.35rem;
    scroll-margin-top: 138px;
}

.publication-count {
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
    margin-left: 8px;
}

.publication-list {
    display: grid;
    gap: 14px;
}

.publication-item {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 18px;
    align-items: center;        /* image vertically centered with text */
    min-width: 0;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.84);
    box-shadow: 0 10px 26px rgba(31, 48, 49, 0.06);
}

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

.publication-image img {
    display: block;
    width: 112px;
    height: 92px;
    object-fit: contain;        /* show full image without cropping */
    border-radius: 6px;
    background: var(--surface-muted);
    border: 1px solid var(--line);
}

.publication-image .ph {
    width: 112px;
    height: 92px;
    border-radius: 6px;
    background:
        linear-gradient(135deg, var(--surface-muted) 25%, transparent 25%) -6px 0/12px 12px,
        linear-gradient(225deg, var(--surface-muted) 25%, transparent 25%) -6px 0/12px 12px,
        linear-gradient(315deg, var(--surface-muted) 25%, transparent 25%) 0 0/12px 12px,
        linear-gradient(45deg, var(--surface-muted) 25%, transparent 25%) 0 0/12px 12px,
        #f3f6f3;
    border: 1px solid var(--line);
}

.publication-content {
    min-width: 0;
    color: #2f3d40;
    font-size: 0.96rem;
    line-height: 1.48;
}

.publication-title {
    font-weight: 800;
    color: var(--ink);
    margin-bottom: 4px;
}

.publication-authors { margin: 2px 0; }

.publication-authors .me {
    color: var(--accent-strong);
    font-weight: 800;
}

.publication-venue {
    color: #435255;
    font-style: italic;
    margin-top: 2px;
}

.publication-venue-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 6px 0 4px;
}

.publication-venue-row .publication-venue {
    margin: 0;
}

.publication-badges {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 6px;
    font-style: normal;
}

.pub-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.78rem;
    font-style: normal;
    font-weight: 750;
    line-height: 1.45;
    border: 1px solid currentColor;
    color: var(--muted);
}

/* Venue badge — filled, prominent (CVPR 2026, TPAMI 2024, ...) */
.pub-badge.venue {
    color: #ffffff;
    background: var(--accent);
    border-color: var(--accent);
}

.pub-badge.ccf-a    { color: var(--warn); }
.pub-badge.ccf-b    { color: var(--warm); }
.pub-badge.ccf-c    { color: var(--muted); }
.pub-badge.oral     { color: var(--accent-strong); }
.pub-badge.spotlight{ color: #7352a3; }

.publication-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 12px;
    padding-top: 10px;
}

.publication-action {
    --action-color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 30px;
    padding: 4px 9px 4px 5px;
    border: 1px solid rgba(28, 37, 40, 0.12);
    border-radius: 6px;
    background: #ffffff;
    color: #263538;
    font-size: 0.84rem;
    font-weight: 750;
    line-height: 1.2;
}

.publication-action:hover {
    border-color: var(--action-color);
    color: var(--action-color);
    text-decoration: none;
}

.publication-action-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 5px;
    background: color-mix(in srgb, var(--action-color) 12%, #ffffff);
    color: var(--action-color);
}

.publication-action-icon svg {
    width: 15px;
    height: 15px;
    display: block;
}

.publication-action-demo    { --action-color: #9f5130; }
.publication-action-project { --action-color: #0b6f69; }
.publication-action-paper   { --action-color: #365f91; }
.publication-action-arxiv   { --action-color: #6a4c93; }
.publication-action-code    { --action-color: #3f6b37; }
.publication-action-blog    { --action-color: #9a5a27; }
.publication-action-dataset { --action-color: #6a5d38; }

/* ---------- awards / timeline / clean lists --------------- */

.timeline-list {
    columns: 2 360px;
    column-gap: 48px;
}

.timeline-list li,
.clean-list li {
    position: relative;
    break-inside: avoid;
    padding: 0 0 12px 22px;
    color: #344245;
}

.timeline-list time {
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    margin-right: 8px;
}

/* ---------- compact grid (edu / work / teach / svc) ------- */

.compact-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.info-block {
    min-width: 0;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72);
    scroll-margin-top: 40px;
}

.info-block .section-heading { margin-bottom: 16px; }
.info-block h2 { font-size: 1.28rem; }

/* ---------- footer ---------------------------------------- */

.site-footer {
    display: flex;
    justify-content: flex-end;
    padding: 26px 0 42px;
    color: var(--muted);
}

.site-footer a { font-weight: 760; }

/* ---------- responsive ------------------------------------ */

@media (max-width: 860px) {
    .site-header,
    .top-nav,
    main,
    .site-footer {
        width: min(100% - 28px, var(--max-width));
    }

    .top-nav {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .nav-links { justify-content: flex-start; }

    .year-nav { top: 102px; }

    .section,
    .info-block { scroll-margin-top: 78px; }

    .publication-section h3 { scroll-margin-top: 190px; }

    .hero {
        grid-template-columns: 1fr;
        gap: 16px;
        min-height: auto;
        padding: 12px 0 16px;
    }

    .portrait-wrap { justify-self: start; }

    .portrait-wrap img {
        width: 140px;
        aspect-ratio: 1 / 1;
    }

    .split-section,
    .compact-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .news-list {
        max-height: 360px;
        padding: 12px;
    }

    .news-list li {
        grid-template-columns: 1fr;
        gap: 2px;
    }

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

    .accent-section { padding: 28px 20px; }
}

@media (max-width: 620px) {
    body { font-size: 15px; }

    .section { padding: 32px 0; }

    .nav-links a,
    .year-nav a {
        min-height: 32px;
        padding: 5px 8px;
        font-size: 0.88rem;
    }

    .hero-actions,
    .contact-list {
        flex-direction: column;
        align-items: stretch;
    }

    .button { width: 100%; }

    .publication-item {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 14px;
    }

    .publication-image img,
    .publication-image .ph {
        width: 100%;
        height: auto;
        aspect-ratio: 16 / 10;
        max-height: 190px;
    }

    .timeline-list { columns: 1; }
}