:root {
  color-scheme: dark;
  --bg: #111a16;
  --bg-deep: #0b120f;
  --surface: #1c2823;
  --surface-raised: #22302a;
  --text: #f4f6f4;
  --muted: #aeb9b3;
  --faint: #748078;
  --line: rgba(255, 255, 255, .12);
  --line-soft: rgba(255, 255, 255, .06);
  --grid: rgba(255, 255, 255, .035);
  --yellow: #ffd84d;
  --yellow-hover: #ffe477;
  --yellow-ink: #1e2117;
  --menu-bg: #f2f2f0;
  --menu-text: #171918;
  --menu-muted: #5b615e;
  --container: 1210px;
  --radius: 30px;
  --shadow: 0 30px 80px rgba(0, 0, 0, .27);
  --ease: 220ms ease;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #edf1ec;
  --bg-deep: #e2e8e2;
  --surface: #f8faf7;
  --surface-raised: #ffffff;
  --text: #17201b;
  --muted: #526058;
  --faint: #7b877f;
  --line: rgba(22, 42, 31, .15);
  --line-soft: rgba(22, 42, 31, .08);
  --grid: rgba(22, 42, 31, .055);
  --yellow: #e1ad00;
  --yellow-hover: #f0c226;
  --yellow-ink: #171a12;
  --shadow: 0 30px 80px rgba(45, 67, 54, .14);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--bg);
  font-family: "Clash Grotesk", "Helvetica Neue", Arial, "PingFang TC", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: color var(--ease), background var(--ease);
}

body.nav-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; max-width: 100%; }
iframe { color-scheme: normal; }

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 15px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 10px 14px;
  color: var(--yellow-ink);
  background: var(--yellow);
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  top: 18px;
  right: 0;
  left: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding-inline: 24px;
  pointer-events: none;
}

.header-shell {
  display: flex;
  align-items: center;
  width: min(940px, 100%);
  min-height: 60px;
  padding: 7px 10px 7px 24px;
  color: var(--menu-text);
  background: var(--menu-bg);
  border: 1px solid rgba(255,255,255,.62);
  border-radius: 999px;
  box-shadow: 0 14px 38px rgba(0,0,0,.13);
  pointer-events: auto;
  transition: box-shadow var(--ease), transform var(--ease);
}

.site-header.is-scrolled .header-shell {
  box-shadow: 0 16px 46px rgba(0,0,0,.2);
  transform: translateY(-4px);
}

.brand {
  flex: 0 0 auto;
  margin-right: auto;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.035em;
  white-space: nowrap;
}

.brand span { color: #d8a600; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 3px;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 14px;
  color: var(--menu-muted);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: color var(--ease), background var(--ease), transform var(--ease);
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--yellow-ink);
  background: var(--yellow);
}

.site-nav a:hover { transform: translateY(-1px); }

.site-nav .site-nav__portfolio {
  gap: 10px;
  margin-left: 7px;
  padding-inline: 20px;
  color: #f6d75e;
  background: #28342f;
}

.site-nav .site-nav__portfolio:hover,
.site-nav .site-nav__portfolio:focus-visible {
  color: #18201c;
  background: var(--yellow);
}

.nav-toggle { display: none; }

.hero {
  position: relative;
  min-height: auto;
  padding: 150px 0 88px;
  overflow: hidden;
  isolation: isolate;
}

.grid-background {
  position: absolute;
  inset: 0;
  z-index: -3;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
}

.hero-glow {
  position: absolute;
  top: 17%;
  right: 7%;
  z-index: -2;
  width: clamp(230px, 33vw, 520px);
  aspect-ratio: 1;
  background: radial-gradient(circle, color-mix(in srgb, var(--yellow) 16%, transparent), transparent 68%);
  border: 1px solid color-mix(in srgb, var(--yellow) 15%, transparent);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(390px, 1.08fr);
  align-items: center;
  gap: clamp(48px, 7vw, 96px);
}

.hero-content { position: relative; z-index: 2; }

.eyebrow {
  margin: 0 0 24px;
  color: var(--yellow);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 560px;
  margin: 0;
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -.045em;
}

.hero h1 span { color: var(--yellow); }

.hero-copy {
  max-width: 540px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.45vw, 18px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 48px;
  padding: 0 17px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: color var(--ease), background var(--ease), border-color var(--ease), transform var(--ease);
}

.hero-cta:hover,
.hero-cta:focus-visible { transform: translateY(-2px); }

.hero-cta--outline {
  color: var(--text);
  background: color-mix(in srgb, var(--surface) 65%, transparent);
}

.hero-cta--outline:hover,
.hero-cta--outline:focus-visible {
  color: var(--yellow);
  border-color: color-mix(in srgb, var(--yellow) 55%, transparent);
}

.hero-cta--surprise {
  color: var(--yellow-ink);
  background: var(--yellow);
  border-color: var(--yellow);
}

.hero-cta--surprise:hover,
.hero-cta--surprise:focus-visible {
  background: var(--yellow-hover);
  border-color: var(--yellow-hover);
}

.experiment-orbit {
  position: relative;
  width: min(100%, 500px);
  aspect-ratio: 1;
  margin-left: auto;
  border-radius: 50%;
  isolation: isolate;
}

.experiment-orbit::before {
  content: "";
  position: absolute;
  inset: 9%;
  z-index: -1;
  background: radial-gradient(circle, color-mix(in srgb, var(--yellow) 8%, transparent), transparent 66%);
  border: 1px solid color-mix(in srgb, var(--yellow) 28%, transparent);
  border-radius: 50%;
  box-shadow: inset 0 0 80px color-mix(in srgb, var(--yellow) 5%, transparent), 0 0 70px color-mix(in srgb, var(--yellow) 4%, transparent);
}

.orbit-ring {
  position: absolute;
  inset: 22%;
  z-index: -1;
  border: 1px solid color-mix(in srgb, var(--text) 12%, transparent);
  border-radius: 50%;
}

.orbit-ring::before,
.orbit-ring::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: color-mix(in srgb, var(--text) 8%, transparent);
  transform: translate(-50%, -50%);
}

.orbit-ring::before { width: 140%; height: 1px; }
.orbit-ring::after { width: 1px; height: 140%; }

.orbit-satellite-track {
  position: absolute;
  inset: 9%;
  z-index: 1;
  border-radius: 50%;
  pointer-events: none;
  animation: labSatelliteOrbit 28s linear infinite;
}

.orbit-satellite {
  position: absolute;
  top: -6px;
  left: 50%;
  display: block;
  width: 12px;
  height: 12px;
  background: var(--bg);
  border: 2px solid var(--yellow);
  border-radius: 50%;
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--yellow) 10%, transparent), 0 0 24px color-mix(in srgb, var(--yellow) 42%, transparent);
  transform: translateX(-50%);
}

.orbit-satellite::after {
  content: "";
  position: absolute;
  top: 3px;
  right: 7px;
  width: 22px;
  height: 2px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--yellow) 58%, transparent));
  border-radius: 999px;
}

.orbit-center {
  position: absolute;
  top: 50%;
  left: 50%;
  display: flex;
  align-items: center;
  flex-direction: column;
  justify-content: center;
  width: 44%;
  aspect-ratio: 1;
  padding: 20px;
  color: var(--text);
  background: color-mix(in srgb, var(--surface-raised) 72%, transparent);
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: 0 20px 55px rgba(0,0,0,.18);
  text-align: center;
  transform: translate(-50%, -50%);
  backdrop-filter: blur(14px);
  pointer-events: none;
}

.orbit-center span {
  color: var(--yellow);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.orbit-center strong {
  max-width: 150px;
  margin-top: 10px;
  font-size: clamp(17px, 2vw, 23px);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -.035em;
  transition: opacity 140ms ease, transform 140ms ease;
}

.orbit-center.is-changing strong {
  opacity: .25;
  transform: translateY(4px);
}

.orbit-node {
  position: absolute;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  transition: color var(--ease), transform var(--ease);
  will-change: translate, rotate;
}

.orbit-node span {
  padding: 5px 7px;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-radius: 999px;
  backdrop-filter: blur(8px);
}

.orbit-node i {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  background: var(--yellow);
  border: 2px solid var(--bg);
  border-radius: 50%;
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--yellow) 14%, transparent);
  transition: box-shadow var(--ease), transform var(--ease);
}

.orbit-node:hover,
.orbit-node:focus-visible,
.orbit-node.is-active { color: var(--yellow); }

.orbit-node:hover i,
.orbit-node:focus-visible i,
.orbit-node.is-active i {
  box-shadow: 0 0 0 8px color-mix(in srgb, var(--yellow) 18%, transparent), 0 0 24px color-mix(in srgb, var(--yellow) 48%, transparent);
  transform: scale(1.18);
}

.orbit-node--skill {
  top: 7%;
  right: 15%;
  flex-direction: column;
  animation: orbitNodeFloatA 7.4s ease-in-out -.8s infinite;
}

.orbit-node--parallax {
  top: 47%;
  left: 0;
  transform: translateY(-50%);
  animation: orbitNodeFloatB 8.6s ease-in-out -3.1s infinite;
}

.orbit-node--parallax:hover,
.orbit-node--parallax:focus-visible { transform: translateY(-50%) translateX(3px); }

.orbit-node--ico {
  top: 47%;
  right: 0;
  flex-direction: row-reverse;
  transform: translateY(-50%);
  animation: orbitNodeFloatA 8.1s ease-in-out -4.7s infinite reverse;
}

.orbit-node--ico:hover,
.orbit-node--ico:focus-visible { transform: translateY(-50%) translateX(-3px); }

.orbit-node--universe {
  bottom: 6%;
  left: 50%;
  flex-direction: column-reverse;
  transform: translateX(-50%);
  animation: orbitNodeFloatB 7.9s ease-in-out -1.9s infinite reverse;
}

.orbit-node--universe:hover,
.orbit-node--universe:focus-visible { transform: translateX(-50%) translateY(-3px); }

.hero-side-label {
  position: absolute;
  right: 24px;
  bottom: 30px;
  margin: 0;
  color: var(--faint);
  font-size: 10px;
  letter-spacing: .18em;
  writing-mode: vertical-rl;
}

.project-list {
  position: relative;
  padding: 0 15px clamp(88px, 10vw, 136px);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 40px 40px;
}

.browser-project {
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(300px, .78fr);
  align-items: stretch;
  gap: clamp(34px, 5vw, 68px);
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: clamp(18px, 2.4vw, 30px);
  background: color-mix(in srgb, var(--text) 5.5%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  scroll-margin-top: 100px;
}

.browser-project + .browser-project {
  margin-top: clamp(28px, 4vw, 46px);
}

.browser-project--tool {
  border-color: color-mix(in srgb, var(--yellow) 30%, var(--line));
}

.browser-window {
  min-width: 0;
  overflow: hidden;
  background: #0d1310;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 22px;
  box-shadow: 0 24px 60px rgba(0,0,0,.3);
}

.browser-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  min-height: 52px;
  padding: 9px 12px 9px 16px;
  background: #29342f;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.browser-dots { display: flex; gap: 7px; }
.browser-dots i { width: 9px; height: 9px; background: #7b837f; border-radius: 50%; }
.browser-dots i:first-child { background: #f17864; }
.browser-dots i:nth-child(2) { background: #e8bd50; }
.browser-dots i:last-child { background: #5bc88d; }

.browser-address {
  min-width: 0;
  margin: 0;
  padding: 9px 14px;
  overflow: hidden;
  color: #aeb7b2;
  background: rgba(7,11,9,.45);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 10px;
  font-size: 11px;
  line-height: 1;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.browser-actions { display: flex; gap: 4px; }

.browser-actions button,
.browser-actions a {
  display: grid;
  width: 34px;
  height: 34px;
  padding: 0;
  place-items: center;
  color: #dce5e0;
  background: transparent;
  border: 0;
  border-radius: 50%;
  cursor: pointer;
  transition: color var(--ease), background var(--ease), transform var(--ease);
}

.browser-actions svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.browser-actions button:hover,
.browser-actions button:focus-visible,
.browser-actions a:hover,
.browser-actions a:focus-visible {
  color: var(--yellow-ink);
  background: var(--yellow);
  transform: translateY(-1px);
}

.browser-viewport {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0d1310;
}

.browser-viewport--universe {
  background: radial-gradient(circle at 50% 50%, #284f41, #0d1310 58%);
}

.browser-viewport--ico {
  background: #dbe3dc url('../images/lab/ico-converter-placeholder.jpg') center / cover no-repeat;
}

.browser-viewport iframe {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  background: transparent;
  border: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 350ms ease;
}

.browser-viewport.is-loaded iframe { opacity: 1; }
.browser-viewport.is-interactive iframe { pointer-events: auto; }

.browser-loader {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-content: center;
  gap: 14px;
  color: #89968f;
  background: rgba(11,18,15,.82);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .14em;
  text-align: center;
  text-transform: uppercase;
  transition: opacity 250ms ease;
}

.browser-loader i {
  width: 24px;
  height: 24px;
  margin: auto;
  border: 2px solid rgba(255,255,255,.13);
  border-top-color: var(--yellow);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}

.browser-viewport.is-loaded .browser-loader { opacity: 0; pointer-events: none; }

.interaction-gate {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: grid;
  width: 100%;
  height: 100%;
  padding: 0;
  place-items: center;
  color: #f4f7f5;
  background: transparent;
  border: 0;
  cursor: pointer;
  opacity: 0;
  touch-action: pan-y;
  transition: opacity var(--ease), background var(--ease);
}

.interaction-gate span {
  padding: 12px 18px;
  background: rgba(12, 19, 16, .86);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  box-shadow: 0 14px 34px rgba(0,0,0,.22);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .03em;
  backdrop-filter: blur(10px);
}

.browser-viewport.is-loaded:hover .interaction-gate,
.interaction-gate:focus-visible {
  opacity: 1;
}

.browser-viewport:not(.is-loaded) .interaction-gate {
  pointer-events: none;
  opacity: 0;
}

.browser-viewport.is-interactive .interaction-gate,
.browser-viewport.is-interactive:hover .interaction-gate,
.browser-viewport.is-interactive .interaction-gate:focus-visible {
  visibility: hidden;
  pointer-events: none;
  opacity: 0;
}

.interactive-status {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 5;
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: 3px;
  padding: 8px 10px;
  color: #f4f7f5;
  background: rgba(12, 19, 16, .9);
  border: 1px solid color-mix(in srgb, var(--yellow) 45%, transparent);
  border-radius: 10px;
  box-shadow: 0 14px 34px rgba(0,0,0,.28);
  cursor: pointer;
  opacity: .88;
  backdrop-filter: blur(12px);
  transition: opacity var(--ease), border-color var(--ease);
}

.interactive-status:hover,
.interactive-status:focus-visible {
  border-color: var(--yellow);
  opacity: 1;
}

.interactive-status[hidden] { display: none; }

.interactive-status strong {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--yellow);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: .11em;
  line-height: 1;
}

.interactive-status strong i {
  width: 7px;
  height: 7px;
  background: var(--yellow);
  border-radius: 50%;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--yellow) 12%, transparent);
}

.interactive-status span {
  color: #9eaaa4;
  font-size: 8px;
  line-height: 1.2;
}

@media (hover: none), (pointer: coarse) {
  .browser-viewport.is-loaded .interaction-gate { opacity: 1; }
  .browser-viewport.is-interactive .interaction-gate {
    visibility: hidden;
    pointer-events: none;
    opacity: 0;
  }
}

.project-content {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(16px, 2.5vw, 28px) clamp(8px, 1vw, 16px);
}

.project-status {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  margin-bottom: 28px;
  color: var(--faint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
}

.project-status span:first-child {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--yellow);
}

.project-status i {
  width: 7px;
  height: 7px;
  background: currentColor;
  border-radius: 50%;
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--yellow) 12%, transparent);
}

.project-content h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -.04em;
}

.project-lead {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.project-hint {
  margin: 15px 0 0;
  color: var(--faint);
  font-size: 13px;
  line-height: 1.6;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.tags span {
  padding: 7px 11px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
}

.project-open {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  min-width: 218px;
  margin-top: 38px;
  padding: 15px 18px;
  color: var(--yellow-ink);
  background: var(--yellow);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  transition: background var(--ease), transform var(--ease);
}

.project-open:hover,
.project-open:focus-visible {
  background: var(--yellow-hover);
  transform: translateY(-2px);
}

.about {
  padding: clamp(88px, 10vw, 136px) 0;
  background: var(--bg-deep);
}

.about-grid {
  display: grid;
  grid-template-columns: .6fr 1.4fr;
  gap: 70px;
}

.about .eyebrow { padding-top: 12px; }

.about h2 {
  margin: 0;
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: -.045em;
}

.about-copy p {
  max-width: 650px;
  margin: 34px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.45vw, 18px);
  line-height: 1.75;
}

.about-copy a {
  display: inline-flex;
  gap: 40px;
  margin-top: 36px;
  padding-bottom: 5px;
  color: var(--yellow);
  border-bottom: 1px solid currentColor;
  font-size: 13px;
  font-weight: 700;
}

.site-footer {
  padding: 66px 0 28px;
  color: #edf4ef;
  background: #070c0a;
}

.footer-main {
  display: flex;
  justify-content: space-between;
  gap: 50px;
  padding-bottom: 64px;
}

.footer-brand {
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -.04em;
}

.footer-main p { margin: 12px 0 0; color: #75827a; font-size: 12px; }
.footer-main nav { display: flex; align-items: flex-start; gap: 28px; }
.footer-main nav a { color: #9ba8a0; font-size: 12px; }
.footer-main nav a:hover, .footer-main nav a:focus-visible { color: #ffd84d; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  color: #5d6961;
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 10px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.theme-toggle {
  position: fixed;
  left: 22px;
  bottom: 22px;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 10px;
  color: var(--text);
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.theme-toggle > span {
  position: relative;
  width: 34px;
  height: 18px;
  background: color-mix(in srgb, var(--text) 10%, transparent);
  border-radius: 999px;
}

.theme-toggle > span i {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 12px;
  height: 12px;
  background: var(--yellow);
  border-radius: 50%;
  transition: transform var(--ease);
}

html[data-theme="light"] .theme-toggle > span i { transform: translateX(16px); }

.theme-icon {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 80;
  display: grid;
  width: 46px;
  height: 46px;
  padding: 0;
  place-items: center;
  color: var(--yellow-ink);
  background: var(--yellow);
  border: 0;
  border-radius: 50%;
  box-shadow: var(--shadow);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--ease), transform var(--ease);
}

.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 680ms ease, transform 680ms ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

.custom-cursor { display: none; }

@media (hover: hover) and (pointer: fine) {
  body, a, button { cursor: none; }

  .custom-cursor {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    display: block;
    pointer-events: none;
    opacity: 0;
    will-change: transform;
  }

  .custom-cursor--dot {
    width: 7px;
    height: 7px;
    margin: -3.5px 0 0 -3.5px;
    background: var(--yellow);
    border-radius: 50%;
  }

  .custom-cursor--ring {
    width: 48px;
    height: 48px;
    margin: -24px 0 0 -24px;
    background: color-mix(in srgb, var(--yellow) 18%, transparent);
    border: 1px solid color-mix(in srgb, var(--yellow) 55%, transparent);
    border-radius: 50%;
    transition: width var(--ease), height var(--ease), margin var(--ease), background var(--ease), opacity var(--ease);
  }

  body.cursor-ready .custom-cursor { opacity: 1; }
  body.cursor-hover .custom-cursor--ring {
    width: 72px;
    height: 72px;
    margin: -36px 0 0 -36px;
    background: color-mix(in srgb, var(--yellow) 28%, transparent);
  }
  body.cursor-hidden .custom-cursor { opacity: 0; }
}

:focus-visible { outline: 2px solid var(--yellow); outline-offset: 4px; }

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes orbitNodeFloatA {
  0%, 100% { translate: 0 0; rotate: -.45deg; }
  34% { translate: 3px -5px; rotate: .55deg; }
  68% { translate: -2px 3px; rotate: -.2deg; }
}

@keyframes orbitNodeFloatB {
  0%, 100% { translate: 0 0; rotate: .35deg; }
  42% { translate: -4px -3px; rotate: -.6deg; }
  74% { translate: 3px 4px; rotate: .18deg; }
}

@keyframes labSatelliteOrbit {
  to { transform: rotate(360deg); }
}

@media (max-width: 1100px) {
  .site-nav a { padding-inline: 15px; }
  .site-nav .site-nav__portfolio { padding-inline: 20px; }
}

@media (max-width: 900px) {
  .site-header { top: 12px; padding-inline: 12px; }

  .header-shell {
    position: relative;
    min-height: 52px;
    padding: 5px 9px 5px 20px;
  }

  .brand { font-size: 16px; }

  .nav-toggle {
    position: relative;
    z-index: 3;
    display: grid;
    flex: 0 0 auto;
    width: 46px;
    height: 46px;
    padding: 0;
    place-content: center;
    gap: 5px;
    color: #171918;
    background: var(--yellow);
    border: 0;
    border-radius: 50%;
    cursor: pointer;
  }

  .nav-toggle span { width: 17px; height: 1.5px; background: currentColor; transition: transform var(--ease), opacity var(--ease); }
  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-6.5px) rotate(-45deg); }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    left: 0;
    display: grid;
    gap: 4px;
    padding: 10px;
    overflow: hidden;
    background: var(--menu-bg);
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 28px;
    box-shadow: 0 22px 55px rgba(0,0,0,.22);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(.985);
    transform-origin: top;
    transition: opacity var(--ease), transform var(--ease);
  }

  .site-nav.is-open { opacity: 1; pointer-events: auto; transform: translateY(0) scale(1); }

  .site-nav a {
    justify-content: space-between;
    width: 100%;
    min-height: 52px;
    padding: 0 18px;
    font-size: 15px;
  }

  .site-nav .site-nav__portfolio { margin: 4px 0 0; padding-inline: 18px; }

  .hero { min-height: auto; padding: 130px 0 62px; }
  .hero-inner { grid-template-columns: 1fr; gap: 34px; }
  .hero-content { max-width: 650px; }
  .hero h1 { font-size: clamp(42px, 8vw, 60px); }
  .hero-copy br { display: none; }
  .experiment-orbit { width: min(480px, 78vw); margin: 0 auto; }
  .hero-glow { top: 48%; right: 50%; transform: translateX(50%); }

  .project-list { padding-inline: 20px; }
  .browser-project { grid-template-columns: 1fr; gap: 14px; }
  .project-content { padding: 26px 10px 12px; }
  .project-content h2 br { display: none; }
  .project-lead { max-width: 720px; }
  .project-open { margin-top: 30px; }

  .about-grid { grid-template-columns: 1fr; gap: 22px; }
  .about .eyebrow { padding-top: 0; }
}

@media (max-width: 600px) {
  .site-header { padding-inline: 10px; }
  .header-shell { min-height: 58px; padding-left: 18px; }
  .brand { max-width: calc(100% - 56px); overflow: hidden; font-size: 15px; text-overflow: ellipsis; }
  .nav-toggle { width: 44px; height: 44px; }

  .hero { min-height: auto; padding: 118px 0 52px; }
  .hero h1 { font-size: clamp(42px, 12vw, 54px); line-height: 1.04; }
  .hero-copy { margin-top: 22px; font-size: 16px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; margin-top: 28px; }
  .hero-cta { width: 100%; }
  .experiment-orbit { width: min(330px, calc(100vw - 38px)); margin-top: 16px; }
  .orbit-center { padding: 14px; }
  .orbit-center span { font-size: 8px; letter-spacing: .1em; }
  .orbit-center strong { max-width: 104px; margin-top: 7px; font-size: 16px; }
  .orbit-node { gap: 6px; font-size: 10px; }
  .orbit-node span { padding: 4px 6px; }
  .orbit-node i { width: 10px; height: 10px; box-shadow: 0 0 0 4px color-mix(in srgb, var(--yellow) 14%, transparent); }
  .orbit-node--skill { top: 5%; right: 12%; }
  .orbit-node--parallax { left: 0; }
  .orbit-node--ico { right: 0; }
  .orbit-node--universe { bottom: 4%; }
  .hero-side-label { display: none; }

  .project-list { padding: 0 10px 100px; }
  .browser-project { gap: 8px; padding: 9px; border-radius: 23px; }
  .browser-project + .browser-project { margin-top: 38px; }
  .browser-window { border-radius: 16px; }
  .browser-bar { gap: 8px; min-height: 48px; padding: 7px 8px 7px 11px; }
  .browser-dots { gap: 4px; }
  .browser-dots i { width: 7px; height: 7px; }
  .browser-address { padding: 7px 8px; font-size: 9px; }
  .browser-actions button { display: none; }
  .browser-actions a { width: 32px; height: 32px; }
  .browser-viewport { aspect-ratio: 4 / 3; }
  .interaction-gate span { padding: 10px 14px; font-size: 11px; }
  .interactive-status { top: 8px; right: 8px; padding: 8px 10px; }
  .interactive-status strong { font-size: 8px; }
  .interactive-status span { font-size: 8px; }

  .project-content { padding: 24px 12px 16px; }
  .project-status { margin-bottom: 24px; }
  .project-content h2 { font-size: clamp(32px, 10vw, 42px); line-height: 1.02; }
  .project-lead { margin-top: 22px; }
  .project-open { width: 100%; }

  .about { padding: 78px 0 86px; }
  .about h2 { font-size: clamp(38px, 11vw, 52px); }
  .footer-main, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-main nav { flex-direction: column; gap: 14px; }
  .footer-bottom { gap: 4px; }
  .theme-toggle { left: 12px; bottom: 12px; height: 42px; }
  .back-to-top { right: 12px; bottom: 12px; width: 42px; height: 42px; }
}

@media (max-width: 360px) {
  .brand { font-size: 14px; }
  .header-shell { padding-left: 15px; }
  .hero h1 { font-size: 40px; }
  .project-status { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
  .reveal { opacity: 1; transform: none; }
  .orbit-node,
  .orbit-satellite-track { animation: none !important; }
  .custom-cursor { display: none !important; }
  body, a, button { cursor: auto; }
}