/* ==========================================================================
   Sara Rostami · portfolio
   Tokens → base → layout → components → sections → lens → responsive
   ========================================================================== */

:root {
  color-scheme: light;
  --bg: #f7f6f2;
  --bg-tint-n: #f0eee8;
  --surface: #ffffff;
  --surface-2: #f4f3ef;
  --ink: #12141c;
  --ink-2: #3f4453;
  --muted: #5f6474;
  --line: #e4e1d9;
  --line-2: #d3cfc4;

  --academia: #5b47d1;
  --academia-ink: #4936bd;
  --academia-soft: #eeebfc;
  --academia-tint: #f3f1fc;
  --industry: #00917f;
  --industry-ink: #006f61;
  --industry-soft: #def3ee;
  --industry-tint: #eef7f4;
  --amber: #b97800;

  --shadow-sm: 0 1px 2px rgba(18, 20, 28, 0.05);
  --shadow: 0 1px 2px rgba(18, 20, 28, 0.04), 0 10px 30px rgba(18, 20, 28, 0.07);
  --shadow-lg: 0 24px 60px rgba(18, 20, 28, 0.18);
  --radius: 18px;
  --radius-sm: 10px;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Fraunces", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --header-h: 64px;
  --gutter: clamp(16px, 4vw, 32px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0d1016;
    --bg-tint-n: #10141b;
    --surface: #151a23;
    --surface-2: #1a202a;
    --ink: #eef0f6;
    --ink-2: #c4c8d4;
    --muted: #9399ab;
    --line: #242b37;
    --line-2: #323a49;
    --academia: #8b7ef0;
    --academia-ink: #ada3f7;
    --academia-soft: rgba(139, 126, 240, 0.16);
    --academia-tint: #13132a;
    --industry: #14a796;
    --industry-ink: #44cdb9;
    --industry-soft: rgba(20, 167, 150, 0.16);
    --industry-tint: #0d1a1d;
    --amber: #e3a531;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1016;
  --bg-tint-n: #10141b;
  --surface: #151a23;
  --surface-2: #1a202a;
  --ink: #eef0f6;
  --ink-2: #c4c8d4;
  --muted: #9399ab;
  --line: #242b37;
  --line-2: #323a49;
  --academia: #8b7ef0;
  --academia-ink: #ada3f7;
  --academia-soft: rgba(139, 126, 240, 0.16);
  --academia-tint: #13132a;
  --industry: #14a796;
  --industry-ink: #44cdb9;
  --industry-soft: rgba(20, 167, 150, 0.16);
  --industry-tint: #0d1a1d;
  --amber: #e3a531;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
}

/* ---------------------------------------------------------------- base */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
p a, li a { color: var(--ink); font-weight: 500; }
h1, h2, h3 { margin: 0; line-height: 1.15; }
h1, h2 { font-family: var(--font-serif); font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 1.08rem; font-weight: 600; letter-spacing: -0.005em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--academia); outline-offset: 3px; border-radius: 6px; }
::selection { background: var(--academia-soft); }

.sr-only, .sprite { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 12px; top: -48px; z-index: 100; background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 8px; }
.skip-link:focus { top: 12px; }

.i { width: 18px; height: 18px; flex: none; }
.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 var(--gutter); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}
.eyebrow-academia { color: var(--academia-ink); }
.eyebrow-industry { color: var(--industry-ink); }
.mini-head { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  font-weight: 500; font-size: 0.95rem; line-height: 1.2; text-decoration: none;
  transition: transform 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-academia { background: var(--academia); color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--academia) 30%, transparent); }
.btn-industry { background: var(--industry); color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--industry) 30%, transparent); }
:root[data-theme="dark"] .btn-academia, :root[data-theme="dark"] .btn-industry { color: #0b0d12; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-academia, :root:not([data-theme="light"]) .btn-industry { color: #0b0d12; } }
.btn-ghost { border-color: var(--line-2); background: transparent; color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink-2); }

.icon-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface); cursor: pointer;
}
.icon-btn:hover { border-color: var(--line-2); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; }
.chips li {
  font-size: 0.82rem; line-height: 1.2; padding: 6px 11px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--ink-2);
}
.chips-academia li { background: var(--surface); }

/* ---------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; gap: 20px; height: var(--header-h); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; flex: none; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  font-family: var(--font-serif); font-size: 0.95rem; color: #fff;
  background: linear-gradient(135deg, var(--academia) 0 50%, var(--industry) 50% 100%);
}
.nav { display: flex; gap: 2px; margin-left: auto; }
.nav a {
  text-decoration: none; font-size: 0.9rem; color: var(--ink-2);
  padding: 6px 10px; border-radius: 8px;
}
.nav a:hover { color: var(--ink); background: var(--surface-2); }
.nav a.is-active { color: var(--ink); background: var(--surface-2); }
.header-tools { display: flex; align-items: center; gap: 8px; }
.menu-toggle { display: none; }
.theme-toggle .i-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .i-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .i-sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .i-moon { display: none; }
}

/* segmented controls (lens + filters) */
.lens, .filter {
  display: inline-flex; padding: 3px; gap: 2px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--line);
}
.lens-btn, .filter-btn {
  border: 0; background: transparent; cursor: pointer;
  font-size: 0.84rem; font-weight: 500; color: var(--ink-2);
  padding: 6px 12px; border-radius: 999px; line-height: 1.2;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.lens-btn:hover, .filter-btn:hover { color: var(--ink); }
.lens-btn[aria-pressed="true"], .filter-btn[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: var(--shadow-sm); }
.lens-btn[data-lens="academia"][aria-pressed="true"], .filter-btn[data-filter="academia"][aria-pressed="true"] { background: var(--academia); color: #fff; }
.lens-btn[data-lens="industry"][aria-pressed="true"], .filter-btn[data-filter="industry"][aria-pressed="true"] { background: var(--industry); color: #fff; }

/* ---------------------------------------------------------------- hero */
.hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(40px, 6vw, 72px);
  overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 140%; z-index: -1;
  background:
    radial-gradient(40% 50% at 70% 30%, color-mix(in srgb, var(--academia) 14%, transparent), transparent 70%),
    radial-gradient(35% 45% at 95% 55%, color-mix(in srgb, var(--industry) 14%, transparent), transparent 70%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(24px, 5vw, 64px); align-items: center; }
.hero-id { display: flex; align-items: center; gap: 16px; margin-bottom: 18px; }
.hero-id .eyebrow { margin: 0; }
.avatar {
  width: 88px; height: 88px; border-radius: 50%; object-fit: cover; flex: none;
  padding: 3px; background: linear-gradient(135deg, var(--academia), var(--industry));
}
.hero h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); margin-bottom: 18px; }
.lead { font-size: clamp(1.1rem, 1.6vw, 1.3rem); line-height: 1.55; color: var(--ink-2); max-width: 36ch; }
.lead em { font-style: normal; color: var(--ink); background: linear-gradient(transparent 62%, color-mix(in srgb, var(--industry) 22%, transparent) 62%); }
.hero-meta { font-size: 0.92rem; color: var(--muted); }
.hero-meta span { display: block; }
.hero-meta a { color: var(--ink-2); font-weight: 500; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0 26px; }

.hero-art { margin: 0; }
.hero-art figcaption { text-align: center; font-size: 0.85rem; color: var(--muted); margin-top: 6px; }
.fork { width: 100%; max-width: 480px; margin: 0 auto; overflow: visible; }
.fork-trunk, .fork-path { fill: none; stroke-width: 3.5; stroke-linecap: round; }
.fork-trunk { stroke: var(--line-2); }
.fork-commit circle { fill: var(--surface); stroke: var(--ink-2); stroke-width: 2.5; }
.fork-split circle { fill: var(--surface); stroke: var(--ink); stroke-width: 3; }
.fork-year { font-family: var(--font-mono); font-size: 12px; fill: var(--muted); letter-spacing: 0.08em; }
.fork-note { font-family: var(--font-sans); font-size: 13px; font-weight: 500; fill: var(--ink-2); }
.fork-branch { cursor: pointer; outline: none; transition: opacity 0.3s ease; }
.fork-branch[data-branch="academia"] .fork-path { stroke: var(--academia); }
.fork-branch[data-branch="industry"] .fork-path { stroke: var(--industry); }
.neurons path { fill: none; stroke: var(--academia); stroke-width: 2.4; stroke-linecap: round; opacity: 0.75; }
.neurons circle { fill: var(--academia); stroke: var(--bg); stroke-width: 2; }
.ann path { fill: none; stroke: var(--industry); stroke-width: 1.3; opacity: 0.45; }
.ann circle { fill: var(--industry); stroke: var(--bg); stroke-width: 2; }
.fork-label { font-family: var(--font-serif); font-size: 20px; font-weight: 600; fill: var(--ink); }
.fork-sub { font-family: var(--font-mono); font-size: 10.5px; fill: var(--muted); letter-spacing: 0.04em; }
.fork-branch:hover .fork-path, .fork-branch:focus-visible .fork-path { stroke-width: 5; }
.fork-branch:focus-visible .fork-label { text-decoration: underline; }
.fork-branch .neurons, .fork-branch .ann { transform-box: fill-box; transform-origin: center; transition: transform 0.35s ease; }
.fork-branch:hover .neurons, .fork-branch:hover .ann, .fork-branch:focus-visible .neurons, .fork-branch:focus-visible .ann { transform: scale(1.06); }
.pulse-a { fill: var(--academia); }
.pulse-b { fill: var(--industry); }
:root[data-lens="academia"] .fork-branch[data-branch="industry"],
:root[data-lens="industry"] .fork-branch[data-branch="academia"] { opacity: 0.32; }
:root[data-lens="academia"] .pulse-b, :root[data-lens="industry"] .pulse-a { display: none; }

/* ---------------------------------------------------------------- sections */
.section { padding: clamp(56px, 8vw, 104px) 0; }
.section-tint-a { background: var(--academia-tint); }
.section-tint-b { background: var(--industry-tint); }
.section-tint-n { background: var(--bg-tint-n); }
.section-head { max-width: 720px; margin-bottom: clamp(28px, 4vw, 44px); }
.section-head h2 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); margin-bottom: 12px; }
.section-intro { color: var(--ink-2); font-size: 1.05rem; margin: 0; }
.section-head-row { max-width: none; display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }
.section-head-row > div { max-width: 720px; }

/* reveal on scroll (only when JS is active) */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- about / paths */
.paths { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.path {
  position: relative; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: clamp(22px, 3vw, 32px); box-shadow: var(--shadow-sm);
  transition: opacity 0.35s ease, transform 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}
.path::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; border-radius: var(--radius) var(--radius) 0 0; }
.path-academia::before { background: var(--academia); }
.path-industry::before { background: var(--industry); }
.path-top { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.path-icon { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; }
.path-icon .i { width: 22px; height: 22px; }
.path-academia .path-icon { background: var(--academia-soft); color: var(--academia-ink); }
.path-industry .path-icon { background: var(--industry-soft); color: var(--industry-ink); }
.path-kicker { margin: 0; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; }
.path-academia .path-kicker { color: var(--academia-ink); }
.path-industry .path-kicker { color: var(--industry-ink); }
.path h3 { font-family: var(--font-serif); font-size: 1.45rem; margin-bottom: 14px; }
.path p { color: var(--ink-2); font-size: 0.97rem; }
.path p strong { color: var(--ink); font-weight: 600; }
.path .chips { margin: 4px 0 22px; }
.path-ctas { display: flex; flex-wrap: wrap; gap: 10px; margin-top: auto; }

.bridge {
  display: grid; grid-template-columns: auto 1fr; gap: 22px; align-items: center;
  margin-top: 20px; padding: 18px 24px; border-radius: var(--radius);
  border: 1px dashed var(--line-2); color: var(--ink-2);
}
.bridge p { margin: 0; font-size: 0.95rem; }
.bridge p strong { color: var(--ink); }
.bridge-art { width: 180px; }
.bridge-a { fill: none; stroke: var(--academia); stroke-width: 2.5; stroke-linecap: round; }
.bridge-b { fill: none; stroke: var(--industry); stroke-width: 2; stroke-linejoin: round; }
.bridge-link { stroke: var(--line-2); stroke-width: 2; stroke-dasharray: 3 4; }
.dot-a { fill: var(--academia); }
.dot-b { fill: var(--industry); }

/* ---------------------------------------------------------------- research */
.themes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.theme { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.theme-art { width: 120px; height: 72px; margin-bottom: 16px; }
.theme-art .ln { fill: none; stroke: var(--line-2); stroke-width: 2; }
.theme-art .ln-a { fill: none; stroke: var(--academia); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.theme-art .ln-b { fill: none; stroke: var(--industry); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.theme-art .fa { fill: var(--academia); }
.theme-art .fb { fill: var(--amber); }
.theme-art .fa-box { fill: var(--academia-soft); stroke: var(--academia); stroke-width: 2; }
.theme h3 { margin-bottom: 8px; }
.theme p { color: var(--ink-2); font-size: 0.95rem; }
.theme-where { margin: 0; font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted) !important; }
.methods { margin-top: 36px; }
.labs { list-style: none; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--line); }
.labs li { display: flex; flex-direction: column; gap: 2px; font-size: 0.92rem; color: var(--muted); }
.labs a, .labs-name { color: var(--ink); font-weight: 600; text-decoration: none; }
.labs a:hover { text-decoration: underline; }
.labs-year { font-family: var(--font-mono); font-size: 0.75rem; color: var(--academia-ink); }

/* ---------------------------------------------------------------- applied AI */
.applied-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 20px; align-items: start; }
.stack-card, .sectors-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.stack { list-style: none; display: grid; gap: 8px; }
.stack-layer {
  display: grid; gap: 2px; padding: 12px 16px; border-radius: 12px;
  background: var(--surface-2); border: 1px solid var(--line);
}
.stack-name { font-weight: 600; font-size: 0.95rem; display: inline-flex; align-items: center; gap: 6px; }
.stack-name em { font-style: normal; font-weight: 500; color: var(--industry-ink); }
.stack-items { font-size: 0.85rem; color: var(--muted); }
.stack-focus {
  background: var(--industry-soft); border-color: color-mix(in srgb, var(--industry) 55%, transparent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--industry) 10%, transparent);
  transform: scale(1.02);
}
.stack-focus .stack-items { color: var(--ink-2); }
.stack-focus .i { color: var(--industry-ink); }

.sector-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.sector-tab {
  border: 1px solid var(--line-2); background: transparent; cursor: pointer;
  padding: 7px 13px; border-radius: 999px; font-size: 0.86rem; font-weight: 500; color: var(--ink-2);
  transition: all 0.15s ease;
}
.sector-tab:hover { border-color: var(--industry); color: var(--ink); }
.sector-tab[aria-selected="true"] { background: var(--industry); border-color: var(--industry); color: #fff; }
.sector-panel { border-top: 1px solid var(--line); padding-top: 18px; }
.sector-panel h4 { margin: 0 0 6px; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.sector-panel p { color: var(--ink-2); font-size: 0.95rem; }
.sector-next { padding: 12px 14px; border-radius: 12px; background: var(--surface-2); border-left: 3px solid var(--industry); }
.sector-next p { margin: 0; }
.sector-projects { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 18px; list-style: none; }
.sector-projects button {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer; text-align: left;
  border: 1px solid var(--line); background: var(--surface-2); color: var(--ink);
  padding: 6px 12px; border-radius: 10px; font-size: 0.85rem; font-weight: 500;
}
.sector-projects button:hover { border-color: var(--industry); }
.sector-projects .i { width: 14px; height: 14px; color: var(--industry-ink); }

/* ---------------------------------------------------------------- projects */
.project-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.card {
  grid-column: span 2; display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line-2); }
.card[hidden] { display: none; }
.card-media {
  position: relative; display: block; width: 100%; padding: 0; border: 0; cursor: zoom-in;
  aspect-ratio: 16 / 10; background: #15133a; overflow: hidden;
}
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .card-media img { transform: scale(1.035); }
.card-media::after {
  content: "View project"; position: absolute; right: 12px; bottom: 12px;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em;
  padding: 6px 10px; border-radius: 999px; color: #fff;
  background: rgba(10, 12, 20, 0.62); backdrop-filter: blur(6px);
  opacity: 0; transform: translateY(6px); transition: all 0.2s ease;
}
.card-media:hover::after, .card-media:focus-visible::after { opacity: 1; transform: none; }
.card-flag {
  position: absolute; left: 12px; top: 12px; z-index: 1;
  font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em;
  padding: 5px 9px; border-radius: 999px; color: #fff; background: rgba(10, 12, 20, 0.6); backdrop-filter: blur(6px);
}
.card-flag::before { content: "◆ "; color: #ffc164; }
.card-body { display: flex; flex-direction: column; gap: 8px; padding: 18px 20px 20px; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.04em; }
.track-dots { display: inline-flex; gap: 4px; }
.track-dot { width: 8px; height: 8px; border-radius: 50%; }
.track-dot.academia { background: var(--academia); }
.track-dot.industry { background: var(--industry); }
.card h3 { font-size: 1.08rem; }
.card h3 button { all: unset; cursor: pointer; }
.card h3 button:hover { text-decoration: underline; text-underline-offset: 3px; }
.card h3 button:focus-visible { outline: 2px solid var(--academia); outline-offset: 3px; border-radius: 4px; }
.card-context { margin: 0; font-size: 0.88rem; color: var(--muted); }
.card .chips { margin-top: auto; padding-top: 8px; }
.card .chips li { font-size: 0.75rem; padding: 4px 9px; }

.card.span-wide { grid-column: span 3; }
.card-archive { grid-column: span var(--span, 6); background: var(--surface-2); padding: 22px 24px; gap: 4px; }
.card-archive:hover { transform: none; }
.card-archive h3 { font-family: var(--font-serif); font-size: 1.25rem; margin-bottom: 4px; }
.card-archive > p { margin: 0 0 10px; font-size: 0.9rem; color: var(--muted); }
.archive-list { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 0 24px; margin-bottom: 14px; }
.archive-list li { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); font-size: 0.9rem; }
.archive-list .term { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); white-space: nowrap; }
.card-archive .link-arrow { margin-top: auto; align-self: flex-start; }

/* ---------------------------------------------------------------- experience */
.exp-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: clamp(24px, 4vw, 48px); align-items: start; }
.timeline { list-style: none; position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: var(--line-2); border-radius: 2px; }
.tl-item { position: relative; padding-bottom: 26px; transition: opacity 0.3s ease; }
.tl-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute; left: -28px; top: 6px; width: 16px; height: 16px; border-radius: 50%;
  border: 3px solid var(--bg-tint-n); background: var(--ink-2);
}
.tl-item.t-academia .tl-dot { background: var(--academia); }
.tl-item.t-industry .tl-dot { background: var(--industry); }
.tl-item.t-academia.t-industry .tl-dot { background: linear-gradient(135deg, var(--academia) 0 50%, var(--industry) 50% 100%); }
.tl-period { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); letter-spacing: 0.04em; }
.tl-item h3 { font-size: 1.02rem; margin: 2px 0; }
.tl-org { font-size: 0.93rem; color: var(--ink-2); margin: 0 0 6px; }
.tl-org a { font-weight: 500; }
.tl-item ul { padding-left: 18px; color: var(--ink-2); font-size: 0.9rem; }
.tl-item ul li { margin: 2px 0; }
.edu-list { list-style: none; display: grid; gap: 12px; }
.edu-list li { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }
.edu-period { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); }
.edu-list h4 { margin: 2px 0 4px; font-size: 0.98rem; }
.edu-list p { margin: 0; font-size: 0.88rem; color: var(--ink-2); }
.edu-note { color: var(--muted) !important; margin-top: 4px !important; }

.link-arrow { display: inline-flex; align-items: center; gap: 4px; font-size: 0.88rem; font-weight: 500; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line-2); }
.link-arrow:hover { border-bottom-color: var(--ink); }
.link-arrow .i { width: 14px; height: 14px; }

/* ---------------------------------------------------------------- recognition */
.recog-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 48px); }
.recog-list { list-style: none; display: grid; gap: 12px; }
.recog-list li { display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; padding: 16px 18px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.recog-list h4 { margin: 0; font-size: 0.98rem; }
.recog-list p { grid-column: 1 / -1; margin: 0; font-size: 0.88rem; color: var(--ink-2); }
.recog-year { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); white-space: nowrap; }
.recog-links { grid-column: 1 / -1; display: flex; gap: 12px; margin-top: 4px; }

/* ---------------------------------------------------------------- contact + footer */
.contact { background: linear-gradient(135deg, var(--academia-tint), var(--industry-tint)); }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
.contact h2 { font-size: clamp(2rem, 4vw, 2.8rem); margin-bottom: 12px; }
.contact-links { list-style: none; display: grid; grid-template-columns: 1fr; gap: 10px; }
.contact-link {
  display: flex; align-items: center; gap: 12px; padding: 16px; height: 100%;
  background: var(--surface); border: 1px solid var(--line); border-radius: 14px; text-decoration: none;
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.contact-link:hover { transform: translateY(-2px); border-color: var(--line-2); }
.contact-link .i { width: 22px; height: 22px; color: var(--ink-2); }
.contact-link span { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--muted); min-width: 0; overflow-wrap: anywhere; }
.contact-link strong { color: var(--ink); font-size: 0.95rem; }
.site-footer { border-top: 1px solid var(--line); padding: 28px 0; font-size: 0.85rem; color: var(--muted); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; }
.footer-inner p { margin: 0; }

/* ---------------------------------------------------------------- dialog */
.project-dialog {
  width: min(960px, calc(100vw - 32px)); max-height: calc(100vh - 48px); padding: 0;
  border: 1px solid var(--line); border-radius: 22px; background: var(--surface); color: var(--ink);
  box-shadow: var(--shadow-lg); overflow: hidden;
}
.project-dialog::backdrop { background: rgba(8, 10, 16, 0.55); backdrop-filter: blur(4px); }
.project-dialog[open] { animation: dlg-in 0.25s ease; }
@keyframes dlg-in { from { opacity: 0; transform: translateY(12px) scale(0.985); } }
.dlg-inner { position: relative; max-height: calc(100vh - 48px); overflow-y: auto; overscroll-behavior: contain; }
.dlg-close { position: sticky; top: 14px; float: right; margin: 14px 14px -52px 0; z-index: 2; background: color-mix(in srgb, var(--surface) 85%, transparent); backdrop-filter: blur(6px); }
.dlg-hero { aspect-ratio: 16 / 9; background: #15133a; overflow: hidden; }
.dlg-hero img { width: 100%; height: 100%; object-fit: cover; }
.dlg-content { padding: clamp(20px, 3.5vw, 36px); }
.dlg-content h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 6px 0 6px; }
.dlg-context { color: var(--muted); margin-bottom: 18px; font-size: 0.95rem; }
.dlg-summary { font-size: 1.05rem; color: var(--ink-2); }
.dlg-cols { display: grid; grid-template-columns: 1.5fr 1fr; gap: 28px; margin-top: 8px; }
.dlg-cols ul { padding-left: 18px; color: var(--ink-2); font-size: 0.95rem; }
.dlg-cols ul.chips { padding-left: 0; }
.dlg-cols li { margin: 6px 0; }
.dlg-side { display: grid; gap: 18px; align-content: start; }
.dlg-side p { margin: 0; font-size: 0.92rem; color: var(--ink-2); }
.dlg-links { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.dlg-section { margin: 0 0 22px; }
.dlg-section p, .dlg-section ul { color: var(--ink-2); font-size: 0.95rem; }
.dlg-section p { margin: 0 0 8px; }
.dlg-section ul { margin: 0; padding-left: 18px; }
.dlg-section li { margin: 6px 0; }
.dlg-callout { padding: 18px 20px; border-radius: 14px; background: var(--industry-soft); border-left: 3px solid var(--industry); }
.dlg-callout .mini-head { color: var(--industry-ink); }
.dlg-viz { margin-top: 28px; padding: 20px; border-radius: 16px; background: var(--surface-2); border: 1px solid var(--line); }

/* ---------------------------------------------------------------- interactive figures (viz.js) */
.viz-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.viz-title { margin: 0; font-weight: 600; font-size: 0.98rem; }
.viz-sub { margin: 2px 0 0; font-size: 0.82rem; color: var(--muted); }
.viz-note { margin: 12px 0 0; font-size: 0.8rem; color: var(--muted); }
.viz-svg { width: 100%; height: auto; overflow: visible; }
.viz-svg text { font-family: var(--font-sans); fill: var(--muted); font-size: 12px; }
.viz-svg .tick text { font-variant-numeric: tabular-nums; }
.viz-svg .grid line { stroke: var(--line); stroke-width: 1; }
.viz-svg .axis { stroke: var(--line-2); stroke-width: 1; }
.viz-svg .bar { fill: var(--industry); transition: opacity 0.15s ease; }
.viz-svg .bar-hit { fill: transparent; cursor: default; }
.viz-svg .bar-group:hover .bar, .viz-svg .bar-group:focus .bar { opacity: 0.8; }
.viz-svg .bar-group:focus { outline: none; }
.viz-svg .bar-group:focus .bar { stroke: var(--ink); stroke-width: 1.5; }
.viz-svg .val { fill: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.viz-svg .cat { fill: var(--ink-2); font-size: 13px; }
.viz-svg .best { fill: var(--industry-ink); font-size: 11px; font-family: var(--font-mono); }
.viz-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 0.86rem; font-variant-numeric: tabular-nums; }
.viz-table th, .viz-table td { text-align: right; padding: 6px 10px; border-bottom: 1px solid var(--line); }
.viz-table th:first-child, .viz-table td:first-child { text-align: left; }
.viz-table th { font-weight: 600; color: var(--muted); font-size: 0.78rem; }
.viz-tip {
  position: fixed; z-index: 1000; pointer-events: none; padding: 8px 10px; border-radius: 10px;
  background: var(--ink); color: var(--bg); font-size: 0.82rem; line-height: 1.35; box-shadow: var(--shadow);
  opacity: 0; transition: opacity 0.12s ease;
}
.viz-tip strong { display: block; font-size: 0.95rem; }
.viz-tip.is-on { opacity: 1; }
.seg { display: inline-flex; padding: 3px; gap: 2px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); }
.seg button { border: 0; background: transparent; cursor: pointer; padding: 5px 11px; border-radius: 999px; font-size: 0.8rem; font-weight: 500; color: var(--ink-2); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }

.erp-std { fill: none; stroke: var(--muted); stroke-width: 2; }
.erp-dev { fill: none; stroke: var(--academia); stroke-width: 2; }
.erp-diff { fill: none; stroke: var(--amber); stroke-width: 2.5; }
.erp-win { fill: var(--amber); opacity: 0.12; }
.erp-zero { stroke: var(--line-2); stroke-width: 1; }
.erp-key { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; font-size: 0.82rem; color: var(--ink-2); }
.erp-key span { display: inline-flex; align-items: center; gap: 6px; }
.erp-key i { display: inline-block; width: 16px; height: 2px; border-radius: 2px; }

.mont-head { fill: var(--surface); stroke: var(--line-2); stroke-width: 2; }
.mont-guide { fill: none; stroke: var(--line); stroke-width: 1; }
.mont-eeg { fill: var(--academia); stroke: var(--surface); stroke-width: 2; transition: opacity 0.25s ease; }
.mont-src { fill: var(--amber); transition: opacity 0.25s ease; }
.mont-det { fill: var(--industry); transition: opacity 0.25s ease; }
.mont-ch { stroke: var(--amber); stroke-width: 2.5; stroke-linecap: round; opacity: 0.7; transition: opacity 0.25s ease; }
.mont-dim { opacity: 0.12 !important; }
.mont-grid { display: grid; grid-template-columns: 240px 1fr; gap: 24px; align-items: center; }
.mont-facts { display: grid; gap: 10px; }
.mont-fact { padding: 12px 14px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); transition: border-color 0.2s ease, opacity 0.25s ease; }
.mont-fact strong { display: block; font-size: 1.15rem; }
.mont-fact span { font-size: 0.85rem; color: var(--ink-2); }
.mont-fact.is-eeg { border-left: 3px solid var(--academia); }
.mont-fact.is-nirs { border-left: 3px solid var(--amber); }

.pipe { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; counter-reset: step; }
.pipe button {
  position: relative; text-align: left; cursor: pointer; padding: 14px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--line); color: var(--ink);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}
.pipe button::before { counter-increment: step; content: "0" counter(step); display: block; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); margin-bottom: 4px; }
.pipe button strong { display: block; font-size: 0.95rem; }
.pipe button span { font-size: 0.78rem; color: var(--muted); }
.pipe button[aria-pressed="true"] { border-color: var(--industry); background: var(--industry-soft); }
.pipe-detail { margin-top: 12px; padding: 14px 16px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); font-size: 0.92rem; color: var(--ink-2); min-height: 72px; }
.pipe-detail strong { color: var(--ink); }

/* ---------------------------------------------------------------- lens emphasis */
:root[data-lens="academia"] .path-industry,
:root[data-lens="industry"] .path-academia { opacity: 0.55; }
:root[data-lens="academia"] .path-industry:hover,
:root[data-lens="industry"] .path-academia:hover,
:root[data-lens="academia"] .path-industry:focus-within,
:root[data-lens="industry"] .path-academia:focus-within { opacity: 1; }
:root[data-lens="academia"] .path-academia { border-color: color-mix(in srgb, var(--academia) 50%, var(--line)); box-shadow: 0 18px 40px color-mix(in srgb, var(--academia) 14%, transparent); }
:root[data-lens="industry"] .path-industry { border-color: color-mix(in srgb, var(--industry) 50%, var(--line)); box-shadow: 0 18px 40px color-mix(in srgb, var(--industry) 14%, transparent); }
:root[data-lens="academia"] .tl-item:not(.t-academia),
:root[data-lens="industry"] .tl-item:not(.t-industry) { opacity: 0.45; }

/* ---------------------------------------------------------------- responsive */
@media (max-width: 1080px) {
  .nav a { padding: 6px 7px; font-size: 0.86rem; }
}
@media (max-width: 980px) {
  .menu-toggle { display: inline-grid; }
  .nav {
    position: absolute; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; gap: 0; margin: 0; padding: 8px var(--gutter) 16px;
    background: var(--bg); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 4px; font-size: 1rem; border-bottom: 1px solid var(--line); border-radius: 0; }
  .header-tools { margin-left: auto; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 460px; margin: 0 auto; width: 100%; }
  .paths, .applied-grid, .exp-grid, .recog-grid, .contact-inner { grid-template-columns: 1fr; }
  .themes { grid-template-columns: 1fr; }
  .labs { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .card, .card.span-wide { grid-column: span 1; }
  .card-archive { grid-column: 1 / -1; }
  .dlg-cols { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  :root { --header-h: 58px; }
  .brand-name { display: none; }
  .header-inner { gap: 10px; }
  .lens-btn { padding: 6px 9px; font-size: 0.8rem; }
  .theme-toggle { display: none; }
  .nav .nav-theme { display: flex; }
  .nav-theme .i-sun { display: none; }
  .project-grid { grid-template-columns: 1fr; }
  .avatar { width: 68px; height: 68px; }
  .fork-sub { font-size: 12.5px; }
  .fork-note { font-size: 15px; }
  .fork-year { font-size: 13px; }
  .bridge { grid-template-columns: 1fr; }
  .bridge-art { width: 150px; }
  .mont-grid { grid-template-columns: 1fr; }
  .mont-grid svg { max-width: 240px; margin: 0 auto; }
  .pipe { grid-template-columns: 1fr 1fr; }
  .project-dialog { width: 100vw; max-width: 100vw; max-height: 100dvh; height: 100dvh; border-radius: 0; margin: 0; }
  .dlg-inner { max-height: 100dvh; }
}
.nav-theme { display: none; align-items: center; gap: 8px; padding: 12px 4px; border: 0; background: none; cursor: pointer; font-size: 1rem; color: var(--ink-2); text-align: left; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .pulses { display: none; }
  .js .reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .hero-art, .filter, .project-dialog, .sector-tabs { display: none !important; }
  .section { padding: 24px 0; }
  .js .reveal { opacity: 1; transform: none; }
}