/* ----------------------------------------------------------------------------
   Shvetank Prakash — personal site
   Minimalist academic style. Harvard Crimson accent.
   ---------------------------------------------------------------------------- */

:root {
    --crimson: #8E1A2C;
    --crimson-dark: #6B121F;
    --text: #1d1d1f;
    --text-muted: #555;
    --text-light: #777;
    --border: #e5e5e5;
    --bg: #ffffff;
    --bg-soft: #fafafa;
    --max-width: 1080px;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    color: var(--text);
    background: var(--bg);
    font-family: "Charter", "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
    font-size: 17px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Sans-serif for headings, nav, sidebar meta */
h1, h2, h3, h4, nav, .sidebar, .nav-bar, .news-date, .award-date, .pub-venue {
    font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
}

a {
    color: var(--crimson);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s ease;
}

a:hover {
    border-bottom-color: var(--crimson);
}

/* ---------- Top navigation ---------- */
.nav-bar {
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 18px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.nav-name {
    font-weight: 600;
    font-size: 16px;
    color: var(--crimson);
    letter-spacing: 0.01em;
}

.nav-name a {
    color: var(--crimson);
}

.nav-name a:hover {
    border-bottom-color: var(--crimson);
}

.nav-links {
    display: flex;
    gap: 26px;
    font-size: 15px;
}

.nav-links a {
    color: var(--text-muted);
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--crimson);
    border-bottom-color: var(--crimson);
}

/* ---------- Page wrapper ---------- */
.wrap {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 48px 32px 80px;
}

.layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 56px;
    align-items: start;
}

/* ---------- Sidebar ---------- */
.sidebar {
    position: sticky;
    top: 32px;
    font-size: 15px;
}

.sidebar img.profile {
    width: 100%;
    max-width: 220px;
    height: auto;
    border-radius: 14px;
    display: block;
    margin-bottom: 18px;
}

.sidebar .name {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 6px;
    color: var(--text);
    letter-spacing: -0.01em;
}

.sidebar .title {
    color: var(--crimson);
    font-size: 14px;
    line-height: 1.5;
    margin: 0 0 4px;
    font-weight: 500;
}

.sidebar .affiliation {
    color: var(--crimson);
    font-size: 14px;
    line-height: 1.5;
    margin: 0 0 18px;
    font-weight: 500;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.sidebar .seas-logo {
    width: 16px;
    height: auto;
    flex-shrink: 0;
    margin-top: 1px;
}

.sidebar .advisors {
    font-size: 13.5px;
    color: var(--text-muted);
    line-height: 1.55;
    margin: 0 0 22px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}

.sidebar .advisors .label {
    color: var(--text-light);
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.08em;
    display: block;
    margin-bottom: 4px;
}

.sidebar .links {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 14px;
}

.sidebar .links li {
    margin: 0 0 7px;
}

.sidebar .links a {
    color: var(--text-muted);
    border-bottom: none;
}

.sidebar .links a:hover {
    color: var(--crimson);
}

.sidebar .links .icon {
    display: inline-flex;
    width: 18px;
    height: 18px;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    margin-right: 10px;
    vertical-align: middle;
}

.sidebar .links .icon svg {
    width: 15px;
    height: 15px;
    fill: currentColor;
    display: block;
}

.sidebar .links li {
    display: flex;
    align-items: center;
    margin: 0 0 9px;
}

.sidebar .links a:hover .icon,
.sidebar .links li:hover .icon {
    color: var(--crimson);
}

/* ---------- Main column ---------- */
main {
    min-width: 0;
}

main h1 {
    font-size: 26px;
    font-weight: 600;
    margin: 0 0 24px;
    letter-spacing: -0.01em;
}

main h1.page-title {
    color: var(--crimson);
}

main h2 {
    font-size: 13px;
    font-weight: 600;
    margin: 44px 0 18px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-light);
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
}

main h2:first-child {
    margin-top: 0;
}

main p {
    margin: 0 0 16px;
}

main p.bio {
    font-size: 17px;
    line-height: 1.7;
}

/* ---------- Research area boxes ---------- */
.research-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 8px;
    align-items: start;
}

.research-box {
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 22px 24px;
    background: var(--bg);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.research-box:hover {
    border-color: var(--crimson);
    box-shadow: 0 2px 16px rgba(165, 28, 48, 0.06);
}

.research-box h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 10px;
    color: var(--crimson);
    letter-spacing: -0.005em;
}

.research-box .blurb {
    font-size: 15px;
    line-height: 1.55;
    color: var(--text);
    margin: 0 0 16px;
    min-height: 4.65em;
}

.research-box details {
    border-top: 1px solid var(--border);
    padding-top: 12px;
}

.research-box summary {
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
    list-style: none;
    user-select: none;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", sans-serif;
    letter-spacing: 0.02em;
}

.research-box summary::-webkit-details-marker {
    display: none;
}

.research-box summary::before {
    content: "▸ ";
    color: var(--crimson);
    margin-right: 4px;
    transition: transform 0.15s ease;
    display: inline-block;
}

.research-box details[open] summary::before {
    content: "▾ ";
}

.research-box ul {
    margin: 12px 0 0;
    padding-left: 18px;
    font-size: 14px;
    line-height: 1.55;
    color: var(--text-muted);
}

.research-box ul li {
    margin-bottom: 6px;
}

.research-box ul li .venue {
    color: var(--text-light);
    font-size: 12.5px;
    font-style: italic;
}

/* ---------- News list ---------- */
.news-wrap {
    position: relative;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg);
    overflow: hidden;
}

.news-wrap::after {
    content: "";
    position: absolute;
    left: 1px;
    right: 10px;
    bottom: 1px;
    height: 32px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.95));
    pointer-events: none;
    border-radius: 0 0 6px 6px;
}

.news {
    list-style: none;
    margin: 0;
    padding: 4px 18px 24px 18px;
    max-height: 340px;
    overflow-y: scroll;
    scrollbar-width: thin;
    scrollbar-color: #c5c5c5 #f0f0f0;
    scrollbar-gutter: stable;
}

.news::-webkit-scrollbar {
    width: 8px;
    background-color: #f0f0f0;
}

.news::-webkit-scrollbar-track {
    background: #f0f0f0;
    border-radius: 0 6px 6px 0;
}

.news::-webkit-scrollbar-thumb {
    background-color: #c5c5c5;
    border-radius: 4px;
    border: 2px solid #f0f0f0;
}

.news::-webkit-scrollbar-thumb:hover {
    background-color: #a0a0a0;
}

.news li {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 20px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15.5px;
    line-height: 1.55;
}

.news li:last-child {
    border-bottom: none;
}

.news-date {
    color: var(--text-light);
    font-size: 13px;
    font-weight: 500;
    padding-top: 1px;
    letter-spacing: 0.01em;
}

/* ---------- Publications list ---------- */
.pub-list {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: pub-counter;
}

.pub-list li {
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    counter-increment: pub-counter;
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 8px;
    font-size: 15.5px;
    line-height: 1.55;
}

.pub-list li:last-child {
    border-bottom: none;
}

.pub-list li::before {
    content: counter(pub-counter) ".";
    color: var(--text-light);
    font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
    font-size: 14px;
    padding-top: 1px;
}

.pub-title {
    font-weight: 600;
    color: var(--text);
    display: block;
    margin-bottom: 4px;
}

.pub-title a {
    color: var(--text);
    border-bottom: 1px solid transparent;
}

.pub-title a:hover {
    color: var(--crimson);
    border-bottom-color: var(--crimson);
}

.pub-venue {
    color: var(--crimson);
    font-size: 13px;
    font-weight: 600;
    font-style: italic;
    letter-spacing: 0.02em;
    margin-right: 6px;
}

.pub-venue.under-review {
    color: var(--text-light);
}

.pub-authors {
    color: var(--text-muted);
    font-size: 14.5px;
    line-height: 1.5;
    display: block;
}

.pub-authors .me {
    color: var(--text);
    font-weight: 600;
}

/* ---------- Awards list ---------- */
.award-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.award-list li {
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
}

.award-list li:last-child {
    border-bottom: none;
}

.award-list h3 {
    font-size: 16px;
    margin: 0 0 4px;
    font-weight: 600;
    color: var(--text);
}

.award-date {
    color: var(--crimson);
    font-size: 13px;
    font-weight: 600;
    font-style: italic;
    margin-bottom: 6px;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
}

.award-list p {
    margin: 0;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.55;
}

/* ---------- Generic content list (teaching, talks) ---------- */
.entry-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.entry-list > li {
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
}

.entry-list > li:last-child {
    border-bottom: none;
}

.entry-list h3 {
    font-size: 16px;
    margin: 0 0 4px;
    font-weight: 600;
    color: var(--text);
}

.entry-list .meta {
    color: var(--text-light);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 8px;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
}

.entry-list .venue-meta {
    color: var(--crimson);
    font-size: 13px;
    font-weight: 600;
    font-style: italic;
    margin-bottom: 8px;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
}

.entry-list p {
    margin: 0 0 6px;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.55;
}

.entry-list ul {
    margin: 8px 0 0;
    padding-left: 20px;
    color: var(--text-muted);
    font-size: 14.5px;
    line-height: 1.55;
}

.entry-list ul li {
    margin-bottom: 4px;
}

.tag {
    display: inline-block;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
    font-size: 11px;
    font-weight: 600;
    color: var(--crimson);
    background: rgba(165, 28, 48, 0.06);
    padding: 2px 8px;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-right: 6px;
    vertical-align: middle;
}

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--border);
    margin-top: 80px;
    padding: 24px 32px;
    text-align: center;
    color: var(--text-light);
    font-size: 13px;
    font-family: -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
}

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
    .layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .sidebar {
        position: static;
        text-align: left;
        max-width: 320px;
    }

    .sidebar img.profile {
        max-width: 180px;
    }

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

    .nav-inner {
        padding: 16px 24px;
    }

    .nav-links {
        gap: 18px;
        font-size: 14px;
    }

    .wrap {
        padding: 32px 24px 60px;
    }

    .news li {
        grid-template-columns: 90px 1fr;
        gap: 14px;
        font-size: 15px;
    }
}

@media (max-width: 540px) {
    body {
        font-size: 16px;
    }

    .nav-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 14px 20px;
    }

    .nav-links {
        gap: 16px;
        flex-wrap: wrap;
    }

    .wrap {
        padding: 24px 20px 48px;
    }

    main h1 {
        font-size: 22px;
    }

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

    .pub-list li {
        grid-template-columns: 28px 1fr;
        font-size: 15px;
    }
}