/* ==========================================================================
   bryanchen.net · shared stylesheet (every page uses this one file)

   To change a colour, edit the hex values in the PALETTE block right below.
   Light and dark versions sit side by side; the site picks one automatically
   from the visitor's system setting, or from the toggle in the header.
   ========================================================================== */

@layer reset, base, layout, components, sections, utilities;

/* ---------- Fonts (self-hosted: no visitor IP goes to a third party) ---------- */
@font-face {
  font-family: "Newsreader";
  font-style: normal;
  font-weight: 200 800;
  font-display: swap;
  src: url("../assets/fonts/newsreader.woff2") format("woff2");
}
@font-face {
  font-family: "Newsreader";
  font-style: italic;
  font-weight: 200 800;
  font-display: swap;
  src: url("../assets/fonts/newsreader-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Geist";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../assets/fonts/geist.woff2") format("woff2");
}
@font-face {
  font-family: "Geist Mono";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../assets/fonts/geist-mono.woff2") format("woff2");
}

/* ---------- PALETTE ---------- */
:root {
  /* Tier 1: raw colours, light | dark */
  --paper-l: #F4F1EA;   --paper-d: #121211;   /* page background        */
  --raised-l: #FBF9F4;  --raised-d: #1B1A18;  /* cards, panels           */
  --ink-l: #1A1916;     --ink-d: #EDE9E1;     /* headings, main text     */
  --soft-l: #4A463E;    --soft-d: #BDB6A8;    /* paragraphs              */
  --faint-l: #6A6458;   --faint-d: #9C9587;   /* labels, dates           */
  --rule-l: #D6CFC0;    --rule-d: #302E2A;    /* hairlines               */
  --accent-l: #5B3FA6;  --accent-d: #B6A3F5;  /* crystal violet: links   */
  --tint-l: #E7E0F5;    --tint-d: #262036;    /* accent wash             */
  --on-accent-l: #FFFFFF; --on-accent-d: #15121F;

  /* Tier 2: what the rest of the CSS uses (light by default) */
  --paper: var(--paper-l);
  --raised: var(--raised-l);
  --ink: var(--ink-l);
  --soft: var(--soft-l);
  --faint: var(--faint-l);
  --rule: var(--rule-l);
  --accent: var(--accent-l);
  --tint: var(--tint-l);
  --on-accent: var(--on-accent-l);
  --shadow: 0 1px 0 rgb(26 25 22 / 0.04), 0 24px 48px -28px rgb(40 30 80 / 0.45);

  /* The microscope panels are always dark, like the real instruments. */
  --scope-bg: #07080A;
  --scope-text: #A29EB2;

  --font-display: "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-body: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --wrap: 76rem;
  --gutter: clamp(1rem, 0.4rem + 3vw, 3.5rem);
  --radius: 0.5rem;
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: var(--paper-d);
    --raised: var(--raised-d);
    --ink: var(--ink-d);
    --soft: var(--soft-d);
    --faint: var(--faint-d);
    --rule: var(--rule-d);
    --accent: var(--accent-d);
    --tint: var(--tint-d);
    --on-accent: var(--on-accent-d);
    --shadow: 0 0 0 1px rgb(255 255 255 / 0.07), 0 24px 48px -28px rgb(0 0 0 / 0.7);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: var(--paper-d);
  --raised: var(--raised-d);
  --ink: var(--ink-d);
  --soft: var(--soft-d);
  --faint: var(--faint-d);
  --rule: var(--rule-d);
  --accent: var(--accent-d);
  --tint: var(--tint-d);
  --on-accent: var(--on-accent-d);
  --shadow: 0 0 0 1px rgb(255 255 255 / 0.07), 0 24px 48px -28px rgb(0 0 0 / 0.7);
}

:root[data-theme="light"] {
  color-scheme: light;
}

/* ========================================================================== */

@layer reset {
  :where(html) { box-sizing: border-box; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
  :where(*, *::before, *::after) { box-sizing: inherit; }
  :where(body, h1, h2, h3, h4, p, figure, blockquote, dl, dd, ol, ul) { margin: 0; }
  :where(ol, ul) { padding: 0; }
  :where(img, svg, video, canvas) { display: block; max-width: 100%; }
  :where(img, video) { height: auto; }
  :where(button) { font: inherit; color: inherit; }
}

@layer base {
  html {
    background: var(--paper);
    color: var(--ink);
    scroll-padding-top: 5.5rem;
    accent-color: var(--accent);
  }

  @media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
  }

  body {
    font-family: var(--font-body);
    font-size: 1.0625rem;
    line-height: 1.6;
    font-size-adjust: from-font;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--paper);
    overflow-x: clip;
  }

  h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-size-adjust: from-font;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.012em;
    text-wrap: balance;
  }

  p, li, dd, figcaption { text-wrap: pretty; }

  a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
  }
  a:hover { text-decoration-thickness: 2px; }

  :focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
  }

  ::selection { background: var(--tint); color: var(--ink); }

  sup { font-size: 0.7em; line-height: 0; }

  code, kbd, .mono { font-family: var(--font-mono); font-size-adjust: from-font; }
}

/* ============================== LAYOUT ============================== */

@layer layout {
  .wrap {
    width: min(100% - 2 * var(--gutter), var(--wrap));
    margin-inline: auto;
  }

  .section {
    padding-block: clamp(4rem, 2.5rem + 6vw, 8rem) 0;
  }
}

/* ============================ COMPONENTS ============================ */

@layer components {

  /* Skip link: first stop for keyboard users. */
  .skip-link {
    position: fixed;
    inset-block-start: 0.75rem;
    inset-inline-start: 0.75rem;
    z-index: 100;
    padding: 0.6rem 1rem;
    background: var(--ink);
    color: var(--paper);
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
  }

  /* ---------- Header ---------- */
  .site-header {
    position: sticky;
    inset-block-start: 0;
    z-index: 20;
    background: var(--paper);
    background: color-mix(in oklab, var(--paper) 86%, transparent);
    -webkit-backdrop-filter: saturate(1.4) blur(12px);
    backdrop-filter: saturate(1.4) blur(12px);
    border-block-end: 1px solid var(--rule);
  }

  .header-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    min-block-size: 4rem;
  }

  .wordmark {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--ink);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 1.3rem;
    letter-spacing: -0.01em;
    white-space: nowrap;
    margin-inline-end: auto;
  }
  .wordmark svg { inline-size: 1.6rem; block-size: 1.6rem; color: var(--accent); flex: none; }

  .nav ul {
    display: flex;
    gap: 1.75rem;
    list-style: none;
  }
  .nav a {
    color: var(--soft);
    text-decoration: none;
    font-size: 0.9375rem;
    padding-block: 0.4rem;
  }
  .nav a:hover { color: var(--ink); }

  .header-tools {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }

  .progress {
    display: none;
    position: absolute;
    inset-inline: 0;
    inset-block-end: -1px;
    block-size: 2px;
    background: var(--accent);
    transform-origin: 0 50%;
  }

  /* ---------- Buttons ---------- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    min-block-size: 2.75rem;
    padding: 0 1.15rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s, translate 0.2s var(--ease-out);
  }
  .btn svg { inline-size: 1.05rem; block-size: 1.05rem; flex: none; }

  .btn-primary { background: var(--ink); color: var(--paper); }
  .btn-primary:hover { background: var(--accent); color: var(--on-accent); }

  .btn-quiet { background: transparent; color: var(--ink); border-color: var(--faint); }
  .btn-quiet:hover { background: var(--raised); border-color: var(--ink); }

  .btn-small { min-block-size: 2.25rem; padding: 0 0.85rem; font-size: 0.875rem; }

  .btn-meta {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    opacity: 0.7;
  }

  .icon-btn {
    display: inline-grid;
    place-items: center;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    border-radius: 50%;
    border: 1px solid transparent;
    background: transparent;
    color: var(--ink);
    cursor: pointer;
  }
  .icon-btn:hover { background: var(--raised); border-color: var(--rule); }
  .icon-btn svg { inline-size: 1.15rem; block-size: 1.15rem; }

  /* The toggle shows the theme you would switch TO. */
  [data-theme-toggle] .i-sun { display: none; }
  [data-theme-toggle][data-state="dark"] .i-sun { display: block; }
  [data-theme-toggle][data-state="dark"] .i-moon { display: none; }
  html:not(.js) [data-theme-toggle] { display: none; }

  /* ---------- Phone menu (native <details>, works with no JavaScript) ---------- */
  .menu { display: none; }
  .menu summary { list-style: none; }
  .menu summary::-webkit-details-marker { display: none; }
  .menu .i-close { display: none; }
  .menu[open] .i-close { display: block; }
  .menu[open] .i-open { display: none; }

  .menu-panel {
    position: absolute;
    inset-inline: 0;
    inset-block-start: 100%;
    background: var(--paper);
    border-block-end: 1px solid var(--rule);
    box-shadow: var(--shadow);
    padding: 0.5rem var(--gutter) 1.25rem;
  }
  .menu-panel ul { list-style: none; }
  .menu-panel a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-block-size: 3rem;
    border-block-end: 1px solid var(--rule);
    color: var(--ink);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: 1.4rem;
  }
  .menu-panel a span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--faint);
  }

  /* ---------- Small typographic pieces ---------- */
  .eyebrow, .kicker, .fig-label, .section-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    line-height: 1.4;
  }
  .eyebrow, .kicker, .section-num { color: var(--faint); }
  .fig-label { color: var(--accent); margin-inline-end: 0.5rem; white-space: nowrap; }

  .lead {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 1.05rem + 0.55vw, 1.45rem);
    line-height: 1.45;
    color: var(--ink);
  }

  .chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    list-style: none;
  }
  .chips li {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    line-height: 1;
    padding: 0.45rem 0.6rem;
    border-radius: 999px;
    background: var(--tint);
    color: var(--ink);
  }

  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-weight: 500;
    min-block-size: 1.5rem;
  }
  .text-link svg { inline-size: 0.95rem; block-size: 0.95rem; }

  /* Pause / play for anything that moves on its own. */
  .media-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-block-size: 2rem;
    padding: 0 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--faint);
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    cursor: pointer;
    white-space: nowrap;
  }
  .media-toggle:hover { border-color: var(--ink); }
  .media-toggle svg { inline-size: 0.8rem; block-size: 0.8rem; }
  .media-toggle .i-play { display: none; }
  .media-toggle[data-paused] .i-play { display: block; }
  .media-toggle[data-paused] .i-pause { display: none; }
  html:not(.js) .media-toggle { display: none; }

  /* ---------- Section heading ---------- */
  .section-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 22rem);
    align-items: end;
    gap: 0.75rem 2rem;
    padding-block-start: 1rem;
    border-block-start: 1px solid var(--ink);
    margin-block-end: clamp(1.5rem, 1rem + 2vw, 3rem);
  }
  .section-head .section-num { grid-column: 1 / -1; }
  .section-head h2 {
    font-size: clamp(2.4rem, 1.4rem + 3.6vw, 4.5rem);
    line-height: 0.98;
    letter-spacing: -0.025em;
  }
  .section-intro {
    color: var(--soft);
    font-size: 1rem;
    max-inline-size: 22rem;
    justify-self: end;
  }

  @media (max-width: 56rem) {
    .section-head { grid-template-columns: minmax(0, 1fr); }
    .section-intro { justify-self: start; }
  }

  /* ---------- Footer ---------- */
  .site-footer {
    margin-block-start: clamp(4rem, 3rem + 5vw, 8rem);
    border-block-start: 1px solid var(--ink);
    padding-block: 1.75rem 2.5rem;
    font-size: 0.875rem;
    color: var(--faint);
  }
  .footer-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 2rem;
  }
  .footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
    list-style: none;
  }
  .footer-links a {
    color: var(--soft);
    display: inline-block;
    padding-block: 0.3rem;
  }
  .colophon { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.02em; }

  /* ---------- Plain text pages (accessibility, privacy, 404, tip jar) ---------- */
  .page-main { padding-block: clamp(3rem, 2rem + 5vw, 6rem) 0; }
  .prose { max-inline-size: 42rem; }
  .prose h1 {
    font-size: clamp(2.6rem, 1.6rem + 4vw, 4.75rem);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-block: 0.75rem 1.25rem;
  }
  .prose h2 {
    font-size: 1.6rem;
    margin-block: 2.75rem 0.75rem;
    padding-block-start: 1rem;
    border-block-start: 1px solid var(--rule);
  }
  .prose p, .prose li { color: var(--soft); }
  .prose p + p { margin-block-start: 1rem; }
  .prose ul { padding-inline-start: 1.25rem; display: grid; gap: 0.5rem; }
  .prose strong { color: var(--ink); font-weight: 600; }
  .prose .lead { margin-block-end: 1.5rem; color: var(--ink); }
  .reviewed { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--faint); }
}

/* ============================ HOME SECTIONS ============================ */

@layer sections {

  /* ---------- Hero ---------- */
  .hero { padding-block: clamp(2.25rem, 1rem + 4.5vw, 5rem) 0; }

  .hero-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(1rem, 2.5vw, 2.5rem);
    align-items: start;
  }
  .hero .eyebrow { grid-column: 1 / -1; }

  .hero-name {
    grid-column: 1 / -1;
    font-size: clamp(3.4rem, 1rem + 9.6vw, 10rem);
    font-weight: 370;
    line-height: 0.9;
    letter-spacing: -0.045em;
    margin-block: clamp(0.75rem, 0.4rem + 1vw, 1.5rem) 0;
    margin-inline-start: -0.04em;
  }

  .hero-rule {
    grid-column: 1 / -1;
    inline-size: 100%;
    margin-inline: 0;
    border: 0;
    border-block-start: 1px solid var(--ink);
    margin-block: clamp(1.25rem, 1rem + 1.5vw, 2.25rem) clamp(1.25rem, 1rem + 1.5vw, 2rem);
  }

  .hero-copy { grid-column: 1 / span 5; display: grid; gap: 1.25rem; align-content: start; }

  .deck {
    font-family: var(--font-display);
    font-size: clamp(1.55rem, 1.1rem + 1.3vw, 2.3rem);
    line-height: 1.15;
    letter-spacing: -0.015em;
    color: var(--ink);
    text-wrap: balance;
  }
  .deck em { color: var(--accent); }

  .hero-body { color: var(--soft); max-inline-size: 34rem; }

  .actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-block-start: 0.25rem; }

  /* ---------- Fig. 1: the nanoparticle tracking simulation ---------- */
  .scope { grid-column: 6 / -1; }

  .scope-frame {
    position: relative;
    aspect-ratio: 16 / 10;
    background: var(--scope-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    color-scheme: dark;
  }
  .scope-frame canvas { inline-size: 100%; block-size: 100%; }

  .scope-hud {
    position: absolute;
    inset: 0.8rem 0.9rem auto;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--scope-text);
    pointer-events: none;
  }

  .figure-caption {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-block-start: 0.85rem;
    font-size: 0.875rem;
    line-height: 1.55;
    color: var(--soft);
  }
  .figure-caption output { color: var(--ink); font-family: var(--font-mono); font-size: 0.8125rem; }

  @media (max-width: 60rem) {
    .hero-copy, .scope { grid-column: 1 / -1; }
    .scope { margin-block-start: 2.5rem; }
  }
  @media (max-width: 36rem) {
    .scope-frame { aspect-ratio: 4 / 3.4; }
    .figure-caption { flex-direction: column; }
  }

  /* ---------- Research entries ---------- */
  .entry {
    display: grid;
    grid-template-columns: 12rem minmax(0, 1fr);
    gap: 1rem clamp(1.5rem, 4vw, 3.5rem);
    padding-block: clamp(2rem, 1.5rem + 2vw, 3rem);
    border-block-start: 1px solid var(--rule);
  }
  .entry:first-of-type { border-block-start: 0; padding-block-start: 0.5rem; }

  .entry-meta {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.75;
    color: var(--faint);
  }
  .entry-meta p:first-child { color: var(--ink); }

  .entry h3 { font-size: clamp(1.6rem, 1.25rem + 1.2vw, 2.25rem); letter-spacing: -0.02em; }
  .entry-org { color: var(--soft); margin-block-start: 0.4rem; }
  .entry .lead { margin-block-start: 1.25rem; max-inline-size: 44rem; }
  .entry > .notes { grid-column: 2; margin-block-start: 0.5rem; }

  .notes {
    margin-block-start: 1.75rem;
    display: grid;
    gap: 0.6rem;
    list-style: none;
    max-inline-size: 44rem;
  }
  .notes li {
    position: relative;
    padding-inline-start: 1.25rem;
    color: var(--soft);
  }
  .notes li::before {
    content: "";
    position: absolute;
    inset-inline-start: 0;
    inset-block-start: 0.7em;
    inline-size: 0.5rem;
    border-block-start: 1px solid var(--accent);
  }

  @media (max-width: 48rem) {
    .entry { grid-template-columns: minmax(0, 1fr); }
    .entry > .notes { grid-column: 1; }
    .entry-meta { display: flex; flex-wrap: wrap; column-gap: 1.25rem; }
  }

  /* ---------- Fig. 2: the isolation pipeline ---------- */
  .pipeline { grid-column: 1 / -1; margin-block-start: 1.25rem; }

  .pipeline ol {
    position: relative;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    counter-reset: step;
  }
  .pipeline ol::before,
  .pipeline ol::after {
    content: "";
    position: absolute;
    inset-inline: 1.25rem 0;
    inset-block-start: 1.25rem;
    border-block-start: 1px dashed var(--faint);
  }
  .pipeline ol::after {
    display: none;
    border-block-start: 2px solid var(--accent);
    inset-block-start: calc(1.25rem - 0.5px);
    transform-origin: 0 50%;
  }

  .pipeline li { position: relative; padding-inline-end: 1rem; }

  .step-icon {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    inline-size: 2.5rem;
    block-size: 2.5rem;
    border-radius: 50%;
    border: 1px solid var(--faint);
    background: var(--paper);
    color: var(--accent);
  }
  .step-icon svg { inline-size: 1.25rem; block-size: 1.25rem; }

  .step-n {
    display: block;
    margin-block-start: 0.9rem;
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    color: var(--faint);
  }
  .pipeline h4 { font-size: 1.2rem; margin-block-start: 0.15rem; }
  .pipeline li p { font-size: 0.875rem; line-height: 1.5; color: var(--soft); margin-block-start: 0.35rem; }

  .pipeline > figcaption {
    margin-block-start: 1.5rem;
    font-size: 0.875rem;
    color: var(--soft);
  }

  @media (max-width: 64rem) {
    .pipeline ol { grid-template-columns: minmax(0, 1fr); gap: 1.4rem; }
    .pipeline ol::before, .pipeline ol::after {
      inset-inline: 1.25rem auto;
      inset-block: 1.25rem 1.25rem;
      border-block-start: 0;
      border-inline-start: 1px dashed var(--faint);
    }
    .pipeline ol::after { border-inline-start: 2px solid var(--accent); transform-origin: 50% 0; inset-inline-start: calc(1.25rem - 0.5px); }
    .pipeline li {
      display: grid;
      grid-template-columns: 2.5rem minmax(0, 1fr);
      column-gap: 1rem;
      padding-inline-end: 0;
    }
    .step-icon { grid-row: 1 / span 3; }
    .step-n { margin-block-start: 0; }
    .pipeline li > :not(.step-icon) { grid-column: 2; }
  }

  /* ---------- iGEM seasons ---------- */
  .seasons { list-style: none; margin-block-start: 1.75rem; display: grid; }
  .seasons > li {
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 1fr);
    gap: 1rem;
    padding-block: 1.4rem;
    border-block-start: 1px solid var(--rule);
  }
  .season-year {
    font-family: var(--font-display);
    font-size: 1.6rem;
    line-height: 1;
    color: var(--faint);
    font-variant-numeric: lining-nums;
  }
  .seasons h4 { font-size: 1.35rem; }
  .seasons div > p { color: var(--soft); margin-block: 0.4rem 0.9rem; max-inline-size: 44rem; }

  /* ---------- Work ---------- */
  .feature {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(1.5rem, 4vw, 4rem);
    align-items: center;
    padding-block-end: clamp(2.5rem, 2rem + 2vw, 4rem);
  }

  .plate-dark {
    position: relative;
    background: var(--scope-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    color-scheme: dark;
  }
  .video-wrap { position: relative; aspect-ratio: 16 / 9; }
  .video-wrap video {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
    scale: 1.3;
    transform-origin: 42% 47%;
  }
  .video-wrap .media-toggle {
    position: absolute;
    inset-inline-end: 0.75rem;
    inset-block-end: 0.75rem;
    background: rgb(7 8 10 / 0.6);
    color: #E7E3F2;
    border-color: rgb(255 255 255 / 0.35);
  }

  .feature h3 { font-size: clamp(1.8rem, 1.3rem + 1.6vw, 2.6rem); letter-spacing: -0.02em; margin-block: 0.6rem 0.9rem; }
  .feature p { color: var(--soft); }

  .metrics {
    list-style: none;
    display: grid;
    gap: 0.5rem;
    margin-block-start: 1.4rem;
    padding-block-start: 1.1rem;
    border-block-start: 1px solid var(--rule);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--soft);
  }
  .metrics strong { color: var(--ink); font-weight: 500; }

  .cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1.25rem, 3vw, 2.5rem);
  }
  .card {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    padding-block-start: 1.25rem;
    border-block-start: 1px solid var(--ink);
  }
  .card-fig {
    aspect-ratio: 16 / 10;
    margin-block-end: 0.75rem;
    border-radius: var(--radius);
    background: var(--raised);
    border: 1px solid var(--rule);
    display: grid;
    place-items: center;
    overflow: hidden;
  }
  .card-fig svg { inline-size: 100%; block-size: 100%; }
  .card h3 { font-size: 1.65rem; letter-spacing: -0.015em; }
  .card p:not(.kicker) { color: var(--soft); font-size: 0.97rem; }
  .card .kicker:last-child { margin-block-start: 0.25rem; color: var(--accent); }
  .card .text-link { margin-block-start: auto; padding-block-start: 0.5rem; }

  @media (max-width: 60rem) {
    .feature { grid-template-columns: minmax(0, 1fr); }
  }
  @media (max-width: 60rem) {
    .cards { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  }
  @media (max-width: 60rem) and (min-width: 36rem) {
    .card {
      display: grid;
      grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
      column-gap: clamp(1.25rem, 3vw, 2rem);
      row-gap: 0.55rem;
      align-content: start;
    }
    .card > * { grid-column: 2; }
    .card > .card-fig { grid-column: 1; grid-row: 1 / span 5; margin: 0; align-self: start; }
  }

  .work-more {
    margin-block-start: clamp(2.25rem, 1.5rem + 2vw, 3.25rem);
    padding-block-start: 1.1rem;
    border-block-start: 1px solid var(--rule);
  }

  /* Line illustrations inside the cards */
  .ill-ink { stroke: var(--soft); fill: none; }
  .ill-faint { stroke: var(--faint); fill: none; }
  .ill-rule { stroke: var(--rule); fill: none; }
  .ill-accent { stroke: var(--accent); fill: none; }
  .ill-accent-fill { fill: var(--accent); }
  .ill-wash { fill: var(--accent); opacity: 0.14; }
  .ill-dot { fill: var(--soft); }
  .ill-text { fill: var(--faint); font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.04em; }
  .ill-text-ink { fill: var(--ink); font-family: var(--font-display); font-size: 15px; }

  /* ---------- Methods ---------- */
  .methods {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 clamp(2rem, 6vw, 6rem);
  }
  .method { padding-block: 1.5rem 2rem; border-block-start: 1px solid var(--rule); }
  .method-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
  .method h3 { font-size: 1.55rem; }
  .method-note {
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    white-space: nowrap;
  }
  .method ul {
    list-style: none;
    margin-block-start: 0.9rem;
    columns: 2 12rem;
    column-gap: 1.5rem;
  }
  .method li {
    break-inside: avoid;
    padding-block: 0.3rem;
    color: var(--soft);
    font-size: 0.97rem;
    line-height: 1.45;
  }
  .languages {
    margin-block-start: 0.5rem;
    padding-block-start: 1.25rem;
    border-block-start: 1px solid var(--rule);
    color: var(--soft);
  }
  .languages strong { color: var(--ink); font-weight: 500; }

  @media (max-width: 52rem) {
    .methods { grid-template-columns: minmax(0, 1fr); }
  }

  /* ---------- About ---------- */
  .about-grid {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: clamp(2rem, 6vw, 6rem);
    align-items: start;
  }

  .portrait { position: sticky; inset-block-start: 6rem; }
  .plate-light {
    position: relative;
    aspect-ratio: 4 / 5;
    display: grid;
    place-items: end center;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--paper-l);
    box-shadow: var(--shadow);
  }
  .plate-light::before {
    content: "";
    position: absolute;
    inline-size: 84%;
    aspect-ratio: 1;
    inset-block-start: 7%;
    inset-inline-start: 8%;
    border-radius: 50%;
    border: 1px solid var(--rule-l);
    box-shadow: inset 0 0 0 10px var(--paper-l), inset 0 0 0 11px var(--rule-l);
  }
  .plate-light img { position: relative; inline-size: 100%; }
  .portrait figcaption { margin-block-start: 0.85rem; font-size: 0.875rem; color: var(--soft); }

  .about-body > * + * { margin-block-start: 1.25rem; }
  .about-body p { color: var(--soft); max-inline-size: 42rem; }
  .about-body .lead { color: var(--ink); }
  .about-body h3 {
    font-size: 1.55rem;
    margin-block-start: 2.75rem;
    padding-block-start: 1rem;
    border-block-start: 1px solid var(--rule);
  }

  .edu { display: grid; gap: 1.5rem; margin-block-start: 1rem; }
  .edu-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0.25rem 1.5rem; }
  .edu-item h4 { font-size: 1.3rem; }
  .edu-when { font-family: var(--font-mono); font-size: 0.8125rem; color: var(--faint); white-space: nowrap; padding-block-start: 0.3rem; }
  .edu-item p:not(.edu-when) { grid-column: 1 / -1; color: var(--soft); font-size: 0.97rem; }

  @media (max-width: 52rem) {
    .about-grid { grid-template-columns: minmax(0, 1fr); }
    .portrait { position: static; max-inline-size: 22rem; }
    .edu-item { grid-template-columns: minmax(0, 1fr); }
    .edu-when { padding-block-start: 0; }
  }

  /* ---------- Contact ---------- */
  .contact { padding-block: clamp(5rem, 3rem + 8vw, 10rem) 0; }
  .contact-title {
    font-size: clamp(3.2rem, 1rem + 9vw, 9rem);
    line-height: 0.92;
    letter-spacing: -0.04em;
    margin-block: 1rem 1.5rem;
  }
  .contact-title em { color: var(--accent); }
  .contact-copy { max-inline-size: 36rem; font-size: 1.15rem; color: var(--soft); }
  .contact .actions { margin-block-start: 2rem; }
  .contact-aside { margin-block-start: 1.5rem; font-size: 0.9375rem; color: var(--faint); }

  /* ---------- Tip jar ---------- */
  .tip-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
    gap: 1.25rem;
    margin-block-start: 2.5rem;
  }
  .tip-card {
    display: grid;
    gap: 0.9rem;
    align-content: start;
    padding: 1.4rem;
    border-radius: 0.75rem;
    border: 1px solid var(--rule);
    background: var(--raised);
  }
  .tip-card h2 { font-size: 1.6rem; }
  .qr {
    inline-size: min(100%, 12rem);
    padding: 0.7rem;
    border-radius: var(--radius);
    background: #FFFFFF;
    color-scheme: light;
  }
  .qr svg, .qr img { inline-size: 100%; block-size: auto; }
  .handle {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--ink);
    overflow-wrap: anywhere;
  }
  .tip-note { font-size: 0.8125rem; color: var(--faint); }
  .tip-note strong { color: var(--ink); font-weight: 600; }
  .tip-card .chips li { font-size: 0.6875rem; }
  html:not(.js) [data-copy] { display: none; }
  .tip-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
}

/* ============================ MOTION ============================
   Everything is visible by default. Motion only runs when the browser
   supports it AND the visitor hasn't asked for reduced motion. */

@media (prefers-reduced-motion: no-preference) {
  .hero-in { animation: rise 0.9s var(--ease-out) both; }
  .hero-in.d1 { animation-delay: 70ms; }
  .hero-in.d2 { animation-delay: 160ms; }
  .hero-in.d3 { animation-delay: 250ms; }
  .hero-in.d4 { animation-delay: 340ms; }

  .btn:hover { translate: 0 -1px; }

  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    .reveal {
      animation: rise linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 75%;
    }
    .pipeline ol::after {
      display: block;
      animation: draw-x linear both;
      animation-timeline: view();
      animation-range: entry 60% cover 55%;
    }
  }

  @supports ((animation-timeline: scroll()) and (animation-range: 0% 100%)) {
    .progress {
      display: block;
      animation: draw-x linear both;
      animation-timeline: scroll(root block);
    }
  }
}

@media (prefers-reduced-motion: no-preference) and (max-width: 64rem) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    .pipeline ol::after {
      animation-name: draw-y;
      animation-timeline: view();
      animation-range: entry 40% cover 60%;
    }
  }
}

@keyframes rise {
  from { opacity: 0; translate: 0 1.25rem; }
}
@keyframes draw-x {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
@keyframes draw-y {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

/* ============================ UTILITIES ============================ */

@layer utilities {
  .visually-hidden:where(:not(:focus-within, :active)) {
    position: absolute !important;
    clip-path: inset(50%) !important;
    overflow: hidden !important;
    width: 1px !important;
    height: 1px !important;
    margin: -1px !important;
    padding: 0 !important;
    border: 0 !important;
    white-space: nowrap !important;
  }

  @media (max-width: 56rem) {
    .nav { display: none; }
    .menu { display: block; }
    .header-row { gap: 0.75rem; }
  }

  @media (max-width: 22.5rem) {
    .header-cv { display: none; }
    .header-tools { gap: 0.25rem; }
  }

  html:not(.js) .scope-frame {
    background: var(--scope-bg) url("../assets/nta-still.webp") center / cover no-repeat;
  }
  html:not(.js) .scope-hud { display: none; }

  @media (pointer: coarse), (max-width: 64rem) {
    .icon-btn, .menu summary { inline-size: 2.75rem; block-size: 2.75rem; }
    .btn-small { min-block-size: 2.75rem; }
    .media-toggle { min-block-size: 2.75rem; padding-inline: 0.9rem; }
    .footer-links a { padding-block: 0.7rem; }
  }

  @media (forced-colors: active) {
    .btn, .icon-btn, .media-toggle { border: 1px solid ButtonText; }
    .progress { display: none; }
  }

  @media print {
    .site-header, .scope, .media-toggle, .skip-link { display: none !important; }
    body { font-size: 11pt; }
  }
}