/* ════════════════════════════════════════════
   Andrey Gizdov — minimal.
   ════════════════════════════════════════════ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --bg: #ffffff;
    --ink: #0a0a0a;
    --dim: #737373;
    --line: #e5e5e5;
    --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --ease: cubic-bezier(.2, .7, .2, 1);
}

html { scroll-behavior: smooth; }
body {
    font: 400 16px/1.65 var(--font);
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--ink); color: var(--bg); }

/* Scroll anchor offset so section tops aren't hidden by the fixed nav. */
#about, #research, #press, #thanks { scroll-margin-top: 96px; }

/* ── Collapsing name ── */
.name {
    position: fixed;
    top: 0; left: 0;
    z-index: 50;
    font-weight: 500;
    font-size: clamp(2.5rem, 13vw, 8.5rem);
    letter-spacing: -0.04em;
    line-height: 1;
    white-space: nowrap;
    color: var(--ink);
    transform-origin: top left;
    will-change: transform;
    padding: 0;
    /* transform and per-letter collapse are driven by JS */
}
.word { display: inline-block; }
.keep { display: inline-block; }
.rest {
    display: inline-block;
    overflow: hidden;
    vertical-align: baseline;
    max-width: 100%;
    opacity: 1;
}
.gap {
    display: inline-block;
    width: 0.3em;
    overflow: hidden;
}

/* ── Nav ── */
.nav {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 60;
    transform: translate3d(0, -140%, 0);
    opacity: 0;
    pointer-events: none;
    transition: transform .55s var(--ease), opacity .35s var(--ease);
}
.nav.visible {
    transform: translate3d(0, 0, 0);
    opacity: 1;
    pointer-events: auto;
}
.nav ul {
    list-style: none;
    display: flex;
    gap: 1.1rem;
    padding: .55rem 1.1rem;
    background: rgba(255, 255, 255, 0.82);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border: 1px solid var(--line);
    border-radius: 999px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02), 0 4px 16px rgba(0,0,0,0.04);
}
.nav a {
    font-size: .85rem;
    font-weight: 500;
    color: var(--dim);
    padding: .15rem 0;
    transition: color .2s var(--ease);
    position: relative;
    display: inline-block;
}
.nav a::after {
    content: '';
    position: absolute;
    left: 0; right: 0; bottom: -2px;
    height: 1px; background: var(--ink);
    transform: scaleX(0);
    transform-origin: right center;
    transition: transform .35s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after, .nav a.active::after {
    transform: scaleX(1);
    transform-origin: left center;
}

/* ── Hero spacer (gives scroll room for the collapse) ── */
.hero {
    height: 100vh;
    min-height: 540px;
}

/* ── Sections ── */
main { position: relative; z-index: 1; }

.section {
    max-width: 680px;
    margin: 0 auto;
    padding: 5rem 1.5rem;
}
.section + .section { padding-top: 3rem; }

.section h2 {
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 2rem;
    display: flex; align-items: center; gap: .7rem;
}

.lede {
    font-size: 1.05rem;
    color: var(--ink);
    line-height: 1.75;
    max-width: 56ch;
}

/* ── Scholar icon ── */
.scholar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px; height: 28px;
    color: var(--dim);
    border-radius: 50%;
    transition: color .2s var(--ease), background-color .2s var(--ease), transform .2s var(--ease);
}
.scholar:hover {
    color: var(--ink);
    background: var(--line);
    transform: translateY(-1px);
}

/* ── Papers ── */
.papers { list-style: none; }
.papers li {
    display: grid;
    grid-template-columns: 3.25rem 1fr;
    gap: 1rem;
    padding: 1.1rem 0;
    border-top: 1px solid var(--line);
    align-items: start;
}
.papers li:last-child { border-bottom: 1px solid var(--line); }
.papers .year {
    font-size: .78rem;
    color: var(--dim);
    padding-top: .2rem;
    font-variant-numeric: tabular-nums;
}
.papers h3 {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: -0.01em;
    margin-bottom: .2rem;
}
.papers p { font-size: .85rem; color: var(--dim); }
.papers em { font-style: normal; color: var(--ink); font-weight: 500; }

/* ── Press ── */
.press { list-style: none; }
.press li { border-top: 1px solid var(--line); }
.press li:last-child { border-bottom: 1px solid var(--line); }

.press a {
    display: grid;
    grid-template-columns: 8rem 1fr 1.5rem;
    gap: 1rem;
    padding: 1.1rem 0;
    align-items: baseline;
    transition: padding-left .3s var(--ease), color .2s var(--ease);
}
.press a:hover { padding-left: .5rem; }
.press .outlet {
    font-size: .95rem;
    font-weight: 500;
    color: var(--ink);
}
.press .desc {
    font-size: .88rem;
    color: var(--dim);
}
.press .arrow {
    justify-self: end;
    font-size: .95rem;
    color: var(--dim);
    opacity: .5;
    transition: transform .3s var(--ease), opacity .2s var(--ease), color .2s var(--ease);
}
.press a:hover .arrow {
    transform: translate(3px, -3px);
    opacity: 1;
    color: var(--ink);
}

/* ── Thanks ── */
.thanks p {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--ink);
}
.thanks strong { font-weight: 600; }

/* ── Footer ── */
.footer {
    text-align: center;
    padding: 3rem 1.5rem;
    font-size: .78rem;
    color: var(--dim);
    margin-top: 3rem;
    border-top: 1px solid var(--line);
}

/* ── Responsive ── */
@media (max-width: 720px) {
    .section { padding: 4rem 1.25rem; }
    .press a { grid-template-columns: 6rem 1fr 1.25rem; gap: .8rem; }
}

@media (max-width: 520px) {
    .nav { top: .75rem; right: .75rem; left: auto; }
    .nav ul { gap: .75rem; padding: .5rem .85rem; }
    .nav a { font-size: .78rem; }
    .section { padding: 3.5rem 1.25rem; }
    .press a {
        grid-template-columns: 1fr 1.25rem;
        row-gap: .1rem;
        padding: 1rem 0;
    }
    .press .outlet { grid-column: 1 / 2; }
    .press .desc   { grid-column: 1 / 2; }
    .press .arrow  { grid-column: 2 / 3; grid-row: 1 / 3; align-self: center; }
}

/* Very narrow: let the pill shrink further and allow tight wrap if needed. */
@media (max-width: 360px) {
    .nav ul { gap: .55rem; padding: .45rem .7rem; }
    .nav a { font-size: .72rem; }
}

/* Accessibility: reduced motion — skip all animation. */
@media (prefers-reduced-motion: reduce) {
    * { transition-duration: .001ms !important; animation-duration: .001ms !important; }
    .name {
        transform: translate3d(1rem, 1rem, 0) scale(0.22) !important;
        transition: none !important;
    }
    .rest, .gap { max-width: 0 !important; opacity: 0 !important; width: 0 !important; }
    .nav { transform: none !important; opacity: 1 !important; pointer-events: auto !important; }
    .hero { height: 40vh; min-height: 200px; }
}

/* Print */
@media print {
    .name, .nav { position: static !important; transform: none !important; opacity: 1 !important; }
    .rest, .gap { max-width: none !important; opacity: 1 !important; width: auto !important; }
    .hero { display: none; }
    body { color: #000; background: #fff; }
}