/* QNS v2 — logo-centred academic prototype */
:root {
  --ink: #050608;
  --ink-2: #0e1218;
  --paper: #f5f4f1;
  --paper-2: #ebe9e4;
  --text: #121418;
  --muted: #5c616b;
  --line: rgba(18, 20, 24, 0.12);
  --line-light: rgba(245, 244, 241, 0.16);
  --accent: #c8a45a;
  --font-display: "EB Garamond", "Times New Roman", serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --max: 1080px;
  --nav-h: 76px;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 100;
  background: #fff;
  padding: 8px 12px;
}

/* Nav */
.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(16px, 4vw, 36px);
  transition: background 0.35s ease, border-color 0.35s ease;
  border-bottom: 1px solid transparent;
}

.site-nav.is-solid {
  background: rgba(5, 6, 8, 0.9);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--line-light);
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #f5f4f1;
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.nav-brand .nav-mark {
  width: 56px;
  height: 54px;
  flex-shrink: 0;
  display: block;
  line-height: 0;
  background: transparent;
  perspective: 480px;
  transform-style: preserve-3d;
}

.nav-mark-svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
  background: transparent;
  transform-style: preserve-3d;
}

.nav-mark-svg .nav-stage {
  transform-style: preserve-3d;
  transform-box: view-box;
  transform-origin: 210px 188px;
}

.nav-mark-svg .nav-tri {
  transform-style: preserve-3d;
  transform-box: view-box;
  transform-origin: 210px 188px;
  will-change: transform;
}

/* 横向旋转 */
.nav-mark-svg .nav-tri-a {
  animation: navSpinHoriz 11s linear infinite;
}

/* 斜着旋转 */
.nav-mark-svg .nav-tri-b {
  animation: navSpinTilt 15s linear infinite;
}

/* 螺旋旋转 */
.nav-mark-svg .nav-tri-c {
  animation: navSpinSpiral 13s linear infinite;
}

.nav-mark-svg .nav-core-orbit {
  transform-style: preserve-3d;
  transform-box: view-box;
  transform-origin: 210px 188px;
  animation: navCoreTumble 9s ease-in-out infinite;
}

.nav-mark-svg .nav-tri polygon {
  fill: none;
  stroke: rgba(245, 244, 241, 0.92);
  stroke-width: 1.35;
  stroke-linejoin: miter;
}

.nav-mark-svg .nav-v {
  fill: rgba(245, 244, 241, 0.92);
  font-family: var(--font-display);
  font-size: 17px;
}

.nav-mark-svg .nav-v.small {
  fill: rgba(245, 244, 241, 0.84);
  font-size: 12px;
}

.nav-mark-svg .nav-core {
  fill: var(--accent);
  font-family: var(--font-display);
  font-size: 21px;
  font-style: italic;
  transform-origin: 0 0;
  animation: navCorePulse 3.8s ease-in-out infinite;
}

@keyframes navSpinHoriz {
  0%   { transform: rotateY(0deg) rotateX(10deg) translateZ(0); }
  25%  { transform: rotateY(90deg) rotateX(-4deg) translateZ(10px); }
  50%  { transform: rotateY(180deg) rotateX(8deg) translateZ(0); }
  75%  { transform: rotateY(270deg) rotateX(-6deg) translateZ(10px); }
  100% { transform: rotateY(360deg) rotateX(10deg) translateZ(0); }
}

@keyframes navSpinTilt {
  0%   { transform: rotate3d(1, 1, 0.15, 0deg) translateZ(0); }
  25%  { transform: rotate3d(1, 1, 0.15, 90deg) translateZ(8px); }
  50%  { transform: rotate3d(1, 1, 0.15, 180deg) translateZ(-4px); }
  75%  { transform: rotate3d(1, 1, 0.15, 270deg) translateZ(8px); }
  100% { transform: rotate3d(1, 1, 0.15, 360deg) translateZ(0); }
}

@keyframes navSpinSpiral {
  0%   { transform: rotateX(24deg) rotateY(0deg) rotateZ(0deg) translateX(0) translateY(0) scale(1); }
  25%  { transform: rotateX(24deg) rotateY(90deg) rotateZ(12deg) translateX(7px) translateY(-5px) scale(1.06); }
  50%  { transform: rotateX(24deg) rotateY(180deg) rotateZ(0deg) translateX(0) translateY(-9px) scale(0.94); }
  75%  { transform: rotateX(24deg) rotateY(270deg) rotateZ(-12deg) translateX(-7px) translateY(-5px) scale(1.05); }
  100% { transform: rotateX(24deg) rotateY(360deg) rotateZ(0deg) translateX(0) translateY(0) scale(1); }
}

@keyframes navCoreTumble {
  0%, 100% { transform: rotateX(0deg) rotateY(0deg) translateZ(0); }
  30% { transform: rotateX(28deg) rotateY(-22deg) translateZ(6px); }
  60% { transform: rotateX(-18deg) rotateY(30deg) translateZ(-3px); }
  85% { transform: rotateX(12deg) rotateY(10deg) translateZ(4px); }
}

@keyframes navCorePulse {
  0%, 100% { opacity: 0.82; }
  45% { opacity: 1; }
  70% { opacity: 0.9; }
}

.nav-mark-svg .nav-copy {
  fill: rgba(245, 244, 241, 0.4);
  font-family: var(--font-body);
  font-size: 8px;
}

.nav-links {
  display: flex;
  gap: clamp(14px, 2vw, 26px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: rgba(245, 244, 241, 0.78);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(245, 244, 241, 0.25);
  background: transparent;
  color: #f5f4f1;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
}

/* Hero — cosmos video + single transparent mark
   Desktop: height follows content so chroma bar sits just under meta (no tall empty foot) */
.hero {
  position: relative;
  min-height: 0;
  display: grid;
  place-items: center;
  align-content: start;
  overflow: visible;
  color: #f5f4f1;
  background: #070a10;
  padding-bottom: 10px;
}

.hero-video {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.88;
  filter: saturate(0.92) contrast(1.05);
  /* +1/4 vs original; grow upward so bottom doesn't stick into About */
  transform: scale(calc(5 / 4));
  transform-origin: center bottom;
}

.hero-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 50% at 50% 42%, rgba(7, 10, 16, 0.18) 0%, rgba(7, 10, 16, 0.55) 58%, rgba(5, 6, 8, 0.88) 100%),
    linear-gradient(180deg, rgba(5, 6, 8, 0.35) 0%, transparent 28%, rgba(5, 6, 8, 0.55) 100%);
}

#particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  opacity: 0.35;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 3;
  width: min(var(--max), calc(100% - 2 * clamp(16px, 4vw, 36px)));
  text-align: center;
  padding: 0 0 14px;
  overflow: visible;
}

.hero-logo {
  --logo-size: min(86.4vw, 648px);
  width: var(--logo-size);
  /* top of page may crop at most ~1/3 of the mark */
  margin: calc(var(--nav-h) - var(--logo-size) / 3) auto 7px;
  opacity: 0;
  transform: scale(0.96);
  animation: logoIn 1.25s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
  filter: drop-shadow(0 8px 28px rgba(0, 0, 0, 0.45));
  perspective: 700px;
  overflow: visible;
}

.hero-logo img,
.hero-logo .logo-mark-svg {
  width: 100%;
  height: auto;
  display: block;
  background: transparent;
  overflow: visible;
}

.logo-mark-svg .mark-stage {
  transform-box: fill-box;
  transform-origin: center;
  transform-style: preserve-3d;
}

.logo-mark-svg .tri-stroke {
  fill: none;
  stroke: rgba(245, 244, 241, 0.92);
  stroke-width: 1.2;
  stroke-linejoin: miter;
}

.logo-mark-svg .tri-spin {
  transform-origin: 0 0;
  transform-box: fill-box;
}

.logo-mark-svg .tri-a {
  animation: triSpinA 36s linear infinite;
}

.logo-mark-svg .tri-b {
  animation: triSpinB 52s linear infinite;
}

.logo-mark-svg .tri-c {
  animation: triSpinC 68s linear infinite;
}

.logo-mark-svg .mark-copy {
  fill: rgba(245, 244, 241, 0.38);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  /* ~half prior on-screen weight; matches quiet copyright under large mark */
  font-size: 5px;
  letter-spacing: 0.03em;
}

@keyframes triSpinA {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes triSpinB {
  from { transform: rotate(40deg); }
  to { transform: rotate(-320deg); }
}

@keyframes triSpinC {
  from { transform: rotate(80deg); }
  to { transform: rotate(440deg); }
}

.hero-logo.is-static .tri-a {
  animation: none;
  transform: rotate(0deg);
}

.hero-logo.is-static .tri-b {
  animation: none;
  transform: rotate(40deg);
}

.hero-logo.is-static .tri-c {
  animation: none;
  transform: rotate(80deg);
}

.hero-brand {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 5.5vw, 3.4rem);
  letter-spacing: 0.01em;
  line-height: 1.05;
  opacity: 0;
  animation: rise 1s ease 0.35s forwards;
}

.hero h1 {
  margin: 0 auto 22px;
  max-width: min(46rem, 90vw);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.12rem, 2.1vw, 1.4rem);
  line-height: 1.4;
  color: rgba(245, 244, 241, 0.9);
  opacity: 0;
  animation: rise 1s ease 0.5s forwards;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

/* lead + spine box + hero CTAs: shrink by 1/3 (keep at 2/3) — scoped only */
.hero-lead {
  margin: 0 auto calc(18px * 2 / 3);
  max-width: none;
  width: max-content;
  color: rgba(245, 244, 241, 0.55);
  font-size: calc(0.86rem * 2 / 3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
  opacity: 0;
  animation: rise 1s ease 0.58s forwards;
}

.hero-spine {
  list-style: none;
  margin: 0 auto calc(26px * 2 / 3);
  padding: calc(16px * 2 / 3) calc(18px * 2 / 3);
  max-width: calc(520px * 2 / 3);
  text-align: left;
  background: rgba(5, 6, 8, 0.42);
  border: 1px solid rgba(245, 244, 241, 0.12);
  backdrop-filter: blur(6px);
  opacity: 0;
  animation: rise 1s ease 0.66s forwards;
}

.hero-spine li {
  position: relative;
  padding: calc(7px * 2 / 3) 0 calc(7px * 2 / 3) calc(18px * 2 / 3);
  color: rgba(245, 244, 241, 0.72);
  font-size: calc(0.88rem * 2 / 3);
  line-height: 1.4;
  border-bottom: 1px solid rgba(245, 244, 241, 0.08);
}

.hero-spine li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.hero-spine li:first-child {
  padding-top: 0;
}

.hero-spine li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: rgba(200, 164, 90, 0.75);
  font-size: calc(0.78rem * 2 / 3);
  top: 0.55em;
}

.hero-spine li:first-child::before {
  content: "";
}

.hero-spine span {
  display: inline-block;
  min-width: 5.2em;
  margin-right: 0.35em;
  color: rgba(245, 244, 241, 0.95);
  font-weight: 500;
}

.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: calc(12px * 2 / 3);
  opacity: 0;
  animation: rise 1s ease 0.78s forwards;
}

.hero-cta .btn {
  min-height: calc(46px * 2 / 3);
  padding: 0 calc(22px * 2 / 3);
  font-size: calc(0.9rem * 2 / 3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 0.9rem;
  text-decoration: none;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: #f5f4f1;
  color: var(--ink);
}

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

.btn-ghost {
  border-color: rgba(245, 244, 241, 0.35);
  color: #f5f4f1;
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero-meta {
  margin-top: 16px;
  margin-bottom: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(245, 244, 241, 0.42);
  opacity: 0;
  animation: rise 1s ease 0.9s forwards;
}

@media (max-width: 600px) {
  .hero-spine {
    padding: calc(14px * 2 / 3) calc(12px * 2 / 3);
  }

  .hero-spine span {
    display: block;
    min-width: 0;
    margin: 0 0 2px;
    font-size: calc(0.78rem * 2 / 3);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent);
  }
}

@keyframes logoIn {
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* Motif strip under hero — chroma bar (video color reference, no heavy media) */
.motif-strip {
  position: relative;
  height: 12px;
  overflow: hidden;
  border: 0;
  background: #0a0c12;
}

.motif-chroma {
  position: absolute;
  inset: -40% -60%;
  background: linear-gradient(
    105deg,
    #ff2d8a 0%,
    #ff5c3a 16%,
    #ffc107 32%,
    #3dff9a 48%,
    #00d4ff 64%,
    #6b5cff 80%,
    #ff2d8a 100%
  );
  background-size: 220% 100%;
  animation: chromaFlow 9s linear infinite;
  filter: saturate(1.15) contrast(1.05);
  opacity: 0.92;
}

.motif-chroma::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.18) 45%,
    transparent 70%
  );
  background-size: 180% 100%;
  animation: chromaSheen 4.5s ease-in-out infinite;
  mix-blend-mode: soft-light;
}

@keyframes chromaFlow {
  from { background-position: 0% 50%; }
  to { background-position: 200% 50%; }
}

@keyframes chromaSheen {
  0%, 100% { background-position: 120% 50%; opacity: 0.35; }
  50% { background-position: -20% 50%; opacity: 0.7; }
}

/* Sections */
.section {
  padding: clamp(64px, 10vw, 104px) 0;
}

.section-inner {
  width: min(var(--max), calc(100% - 2 * clamp(16px, 4vw, 36px)));
  margin: 0 auto;
}

.section-kicker {
  margin: 0 0 10px;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8a7350;
}

.section h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.85rem, 3.4vw, 2.55rem);
  line-height: 1.12;
  max-width: 16ch;
}

.section-intro {
  margin: 0 0 36px;
  max-width: 56ch;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* About */
.about {
  background: var(--paper);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.about-copy p {
  margin: 0 0 1em;
  max-width: 58ch;
}

.mark-card {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
}

.mark-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
}

.mark-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.55;
}

.mark-card code {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
}

.stance {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 2px solid var(--text);
  background: rgba(18, 20, 24, 0.04);
  font-size: 0.95rem;
}

.contact .stance {
  margin-top: 32px;
}

/* Triad — three time arrows from the mark */
.triad {
  background: var(--paper-2);
}

.triad-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.triad-item {
  background: #fff;
  padding: 28px 24px;
}

.triad-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
}

.triad-item h3 span {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
  font-family: var(--font-body);
}

.triad-item h3 code {
  font-family: var(--font-display);
  font-size: inherit;
  font-weight: 500;
  background: none;
  padding: 0;
  color: inherit;
}

.triad .section-intro code {
  font-size: 0.95em;
}

.triad-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Theory */
.theory {
  background: var(--ink);
  color: #f5f4f1;
}

.theory .section-kicker {
  color: var(--accent);
}

.theory .section-intro {
  color: rgba(245, 244, 241, 0.55);
}

.theory-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
}

.theory-list a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-light);
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.theory-list a:hover {
  color: var(--accent);
  padding-left: 6px;
}

.theory-list .idx {
  color: rgba(245, 244, 241, 0.35);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
}

.theory-list .date {
  color: rgba(245, 244, 241, 0.4);
  font-size: 0.8rem;
  white-space: nowrap;
}

/* Work */
.work-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.work-list li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 22px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.work-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.work-list time {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  padding-top: 3px;
}

.work-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 500;
}

.work-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

/* Visuals */
.visuals {
  background: var(--paper-2);
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.visual-card {
  background: #fff;
  border: 1px solid var(--line);
  overflow: hidden;
}

.visual-card img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  background: #0e1218;
  transition: transform 0.7s ease;
}

.visual-card:hover img {
  transform: scale(1.03);
}

.visual-card figcaption {
  padding: 14px 16px 16px;
}

.visual-card h3 {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
}

.visual-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.note {
  margin-top: 24px;
  font-size: 0.88rem;
  color: var(--muted);
}

/* Contact */
.contact {
  background: #fff;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.contact dl {
  margin: 0;
  display: grid;
  gap: 16px;
}

.contact dt {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.contact dd {
  margin: 0;
  font-size: 1.02rem;
}

.contact a {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

.contact-panel {
  padding: 28px;
  background: var(--ink);
  color: #f5f4f1;
}

.contact-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
}

.contact-panel p {
  margin: 0 0 18px;
  color: rgba(245, 244, 241, 0.62);
}

.site-footer {
  padding: 28px clamp(16px, 4vw, 36px) 40px;
  background: var(--ink);
  color: rgba(245, 244, 241, 0.45);
  font-size: 0.8rem;
}

.site-footer .footer-legal {
  display: grid;
  gap: 16px;
  border-top: 1px solid var(--line-light);
  padding-top: 22px;
}

.site-footer .legal-warn {
  margin: 0;
  max-width: 72rem;
  line-height: 1.65;
  color: rgba(245, 244, 241, 0.58);
  font-size: 0.78rem;
  padding: 12px 14px;
  border-left: 3px solid rgba(255, 140, 90, 0.75);
  background: rgba(255, 120, 80, 0.06);
}

.site-footer .legal-warn strong {
  color: rgba(255, 196, 140, 0.95);
  font-weight: 600;
}

.site-footer .footer-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.site-footer a {
  color: rgba(245, 244, 241, 0.75);
}

@media (max-width: 900px) {
  .about-grid,
  .contact-grid,
  .triad-grid,
  .visual-grid {
    grid-template-columns: 1fr;
  }

  .work-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .hero-logo {
    --logo-size: min(90vw, 504px);
    width: var(--logo-size);
    margin-top: calc(var(--nav-h) - var(--logo-size) / 3);
  }

  .hero-video {
    opacity: 0.8;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 18px 18px;
    background: rgba(5, 6, 8, 0.97);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    border-top: 1px solid var(--line-light);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .hero-logo,
  .hero-brand,
  .hero h1,
  .hero-lead,
  .hero-cta,
  .hero-meta,
  .reveal {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }

  .motif-chroma,
  .motif-chroma::after {
    animation: none;
  }

  .logo-mark-svg .tri-a,
  .logo-mark-svg .tri-b,
  .logo-mark-svg .tri-c {
    animation: none !important;
  }

  .nav-mark-svg animateTransform {
    display: none;
  }

  .nav-mark-svg .nav-core,
  .nav-mark-svg .nav-tri-a,
  .nav-mark-svg .nav-tri-b,
  .nav-mark-svg .nav-tri-c,
  .nav-mark-svg .nav-core-orbit {
    animation: none;
  }

  .logo-mark-svg .tri-a { transform: rotate(0deg); }
  .logo-mark-svg .tri-b { transform: rotate(40deg); }
  .logo-mark-svg .tri-c { transform: rotate(80deg); }
}