/* ============================================================
   QuarkX — Signal Through the Machine
   Dark Claude palette · scroll-driven WebGL experience
   ============================================================ */

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

:root {
  color-scheme: light;

  /* Paper world (the diorama) */
  --paper: #f0e7da;
  --paper-raised: #f4ece3;
  --ink: #221a13;
  --ink-sec: #5f5147;
  --ink-faint: #93836f;
  --ink-line: rgba(34, 26, 19, 0.13);
  --ink-line-strong: rgba(34, 26, 19, 0.24);
  --accent-ink: #7a2f2d;

  /* Dark world (closing sections) */
  --bg-deep: #120d09;
  --bg: #17110c;
  --line: rgba(244, 236, 227, 0.1);
  --line-strong: rgba(244, 236, 227, 0.18);

  --cream: #f4ece3;
  --cream-dim: #cfc2b3;
  --muted: #978876;

  /* Claude accents */
  --coral: #d97757;
  --coral-bright: #ff8a5c;
  --coral-deep: #b8512e;
  --coral-soft: rgba(217, 119, 87, 0.12);
  --coral-bdr: rgba(217, 119, 87, 0.35);
  --copper: #b26c3d;
  --maroon: #7a2f2d;

  /* unified: one display serif + one body sans for everything */
  --font-display: "DM Serif Display", Georgia, "Times New Roman", serif;
  --font-body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --font-mono: "Source Sans 3", "Segoe UI", system-ui, sans-serif;

  --text-xs: clamp(0.68rem, 0.64rem + 0.16vw, 0.78rem);
  --text-sm: clamp(0.84rem, 0.79rem + 0.2vw, 0.92rem);
  --text-base: clamp(1rem, 0.95rem + 0.18vw, 1.08rem);
  --text-lg: clamp(1.08rem, 1rem + 0.55vw, 1.3rem);
  --text-xl: clamp(1.35rem, 1.12rem + 0.95vw, 1.8rem);
  --text-2xl: clamp(1.8rem, 1.35rem + 1.9vw, 2.9rem);
  --text-3xl: clamp(2.4rem, 1.7rem + 3.2vw, 4.4rem);
  --text-4xl: clamp(3rem, 1.9rem + 5.4vw, 6.6rem);

  --space-xs: 0.5rem;
  --space-sm: 0.85rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 6rem;
  --space-3xl: 9rem;

  --max-width: 1320px;
  --gutter: clamp(1.4rem, 1rem + 3vw, 4.5rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 180ms;
  --dur: 420ms;

  --header-h: 76px;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scrollbar-color: rgba(184, 81, 46, 0.55) #f0e7da;
}

body {
  min-width: 320px;
  overflow-x: clip;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
}

::selection {
  background: var(--coral);
  color: #fff6ec;
}

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

a {
  color: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: var(--space-md);
  z-index: 200;
  padding: 0.6rem 1.1rem;
  background: var(--coral);
  color: #17110c;
  font-weight: 600;
  border-radius: 4px;
  text-decoration: none;
  transition: top var(--dur-fast) ease;
}

.skip-link:focus {
  top: var(--space-md);
}

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

/* ============ Loader ============ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: grid;
  place-items: center;
  background: var(--paper);
  transition: opacity 700ms var(--ease), visibility 700ms;
}

.loader.is-done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-mark {
  display: grid;
  justify-items: center;
  gap: 1.1rem;
}

.loader-logo {
  width: clamp(160px, 24vw, 240px);
  height: auto;
}

.loader-bar {
  width: clamp(180px, 30vw, 280px);
  height: 1px;
  background: var(--ink-line);
  overflow: hidden;
}

.loader-fill {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--copper), var(--coral-bright));
  transition: width 300ms ease-out;
}

.loader-status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ============ WebGL stage ============ */
.gl-stage {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

#gl {
  width: 100%;
  height: 100%;
  display: block;
}

.gl-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      120% 90% at 50% 46%,
      transparent 58%,
      rgba(140, 108, 82, 0.16) 100%
    );
}

.gl-stage::after {
  /* film grain */
  content: "";
  position: absolute;
  inset: -50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.05;
  animation: grain 9s steps(10) infinite;
}

@keyframes grain {
  0%, 100% { transform: translate(0, 0); }
  10% { transform: translate(-5%, -8%); }
  30% { transform: translate(4%, 7%); }
  50% { transform: translate(-7%, 3%); }
  70% { transform: translate(6%, -4%); }
  90% { transform: translate(-3%, 6%); }
}

/* ============ Header ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition:
    transform 500ms var(--ease),
    background 400ms ease,
    border-color 400ms ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(240, 231, 218, 0.86);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--ink-line);
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  height: var(--header-h);
  padding-inline: var(--gutter);
  max-width: var(--max-width);
  margin-inline: auto;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.site-logo img {
  height: 30px;
  width: auto;
}

.header-nav {
  display: flex;
  gap: clamp(1.1rem, 2.4vw, 2.4rem);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.header-nav a {
  position: relative;
  text-decoration: none;
  color: var(--ink-sec);
  padding-block: 0.35rem;
  transition: color var(--dur-fast) ease;
}

.header-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--coral-deep);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 350ms var(--ease);
}

.header-nav a:hover,
.header-nav a.is-active {
  color: var(--ink);
}

.header-nav a:hover::after,
.header-nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* ============ Buttons ============ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 1.9rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    background var(--dur-fast) ease,
    color var(--dur-fast) ease,
    border-color var(--dur-fast) ease,
    box-shadow 350ms ease;
  will-change: transform;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: 0 0 0 rgba(184, 81, 46, 0);
}

.btn-primary:hover {
  background: var(--coral-deep);
  color: #fff6ec;
  box-shadow: 0 10px 30px rgba(184, 81, 46, 0.35);
}

.btn-ghost {
  border-color: var(--ink-line-strong);
  color: var(--ink);
}

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

/* dark sections re-skin the buttons */
.faq .btn-ghost,
.contact .btn-ghost {
  border-color: var(--line-strong);
  color: var(--cream);
}

.contact .btn-primary {
  background: var(--coral);
  color: #1a0f08;
}

.contact .btn-primary:hover {
  background: var(--coral-bright);
  box-shadow: 0 6px 32px rgba(217, 119, 87, 0.45);
}

.btn-sm {
  padding: 0.62rem 1.3rem;
  font-size: var(--text-xs);
}

.btn-lg {
  padding: 1.2rem 2.6rem;
  font-size: var(--text-base);
  text-transform: none;
  letter-spacing: 0.02em;
  font-family: var(--font-mono);
}

/* ============ Menu toggle / mobile menu ============ */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 7px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 1px solid var(--ink-line-strong);
  border-radius: 50%;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: var(--ink);
  transition: transform 350ms var(--ease), opacity 250ms ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(4.25px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-4.25px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--gutter);
  background: rgba(240, 231, 218, 0.94);
  -webkit-backdrop-filter: blur(22px);
  backdrop-filter: blur(22px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 450ms var(--ease), visibility 450ms;
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-nav {
  display: grid;
  gap: 0.4rem;
}

.mobile-link {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2rem, 9vw, 3.4rem);
  line-height: 1.25;
  text-decoration: none;
  color: var(--ink);
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease),
    color var(--dur-fast) ease;
}

.mobile-menu.is-open .mobile-link {
  opacity: 1;
  transform: translateY(0);
}

.mobile-link:hover {
  color: var(--coral-deep);
}

.mobile-menu-meta {
  display: grid;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--ink-faint);
}

.mobile-menu-meta a {
  color: var(--coral-deep);
  text-decoration: none;
}

html.menu-open,
body.menu-open {
  overflow: hidden;
}

/* ============ Shared type ============ */
.kicker {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--coral-deep);
  margin-bottom: var(--space-lg);
}

.kicker::before {
  content: "";
  width: 2rem;
  height: 1px;
  background: var(--coral-deep);
  opacity: 0.6;
}

.faq .kicker,
.contact .kicker {
  color: var(--coral);
}

.faq .kicker::before,
.contact .kicker::before {
  background: var(--coral);
}

.section-heading {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-3xl);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 18ch;
  margin-bottom: var(--space-lg);
}

.section-intro {
  font-size: var(--text-lg);
  color: var(--cream-dim);
  max-width: 56ch;
  margin-bottom: var(--space-2xl);
}

/* split-text reveal targets — bottom padding keeps descenders unclipped */
.split-word {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
  padding-bottom: 0.16em;
  margin-bottom: -0.16em;
}

.split-word > span {
  display: inline-block;
}

html.js:not(.reduced-motion) .split-word > span {
  transform: translateY(110%);
}

/* generic reveal */
html.js:not(.reduced-motion) [data-reveal] {
  opacity: 0;
  transform: translateY(36px);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  z-index: 2;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding-top: calc(var(--header-h) + 4vh);
}

.hero-inner {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-lg);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-sec);
}

.eyebrow-dot {
  width: 1.6rem;
  height: 2px;
  background: var(--coral-deep);
}

.hero-headline {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-4xl);
  line-height: 1.02;
  letter-spacing: -0.015em;
  max-width: 14ch;
}

.hero-headline em {
  font-style: italic;
  color: var(--coral-deep);
}

.hl-line {
  display: block;
  overflow: hidden;
  padding-bottom: 0.14em;
  margin-bottom: -0.14em;
}

.hl-line > span {
  display: block;
}

html.js:not(.reduced-motion) .hl-line > span {
  transform: translateY(112%);
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--ink-sec);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-sm);
}

.hero-foot {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-lg) var(--gutter) calc(var(--space-lg) + 1vh);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-lg);
}

.hero-reassurance {
  font-size: var(--text-sm);
  color: var(--ink-faint);
  max-width: 34ch;
}

.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  background: none;
  border: 0;
  color: var(--ink-sec);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--dur-fast) ease;
}

.scroll-cue:hover {
  color: var(--coral-deep);
}

.scroll-cue-track {
  position: relative;
  width: 1px;
  height: 44px;
  background: var(--ink-line-strong);
  overflow: hidden;
}

.scroll-cue-thumb {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 14px;
  background: var(--coral-deep);
  animation: cue-slide 2s var(--ease-io) infinite;
}

@keyframes cue-slide {
  0% {
    transform: translateY(-16px);
  }
  60%,
  100% {
    transform: translateY(48px);
  }
}

/* ============ Journey ============ */
.journey {
  position: relative;
  z-index: 2;
  /* tall scroll runway; the stage pins inside */
  height: 520svh;
}

.journey-stage {
  position: sticky;
  top: 0;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(var(--header-h) + 2.5vh) var(--gutter) 4.5vh;
  max-width: var(--max-width);
  margin-inline: auto;
}

.journey-head {
  pointer-events: none;
}

.journey-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-2xl);
  line-height: 1.05;
  max-width: 14ch;
}

.journey-steps {
  list-style: none;
  width: min(460px, 88vw);
  display: grid;
  gap: 0.35rem;
}

.journey-step {
  border-top: 1px solid var(--ink-line);
  padding-block: 0.55rem;
  transition: border-color 400ms ease;
}

.journey-step.is-active {
  border-top-color: rgba(184, 81, 46, 0.45);
}

.step-head {
  display: flex;
  align-items: baseline;
  gap: 1.1rem;
  width: 100%;
  background: none;
  border: 0;
  padding: 0.35rem 0;
  cursor: pointer;
  text-align: left;
  color: var(--ink-faint);
  transition: color 400ms ease;
}

.step-index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: inherit;
  transition: color 400ms ease;
}

.step-title {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: font-size 450ms var(--ease), color 400ms ease;
}

.journey-step.is-active .step-head {
  color: var(--ink);
}

.journey-step.is-active .step-index {
  color: var(--coral-deep);
}

.journey-step.is-active .step-title {
  font-size: var(--text-xl);
  font-family: var(--font-display);
  font-weight: 400;
}

.step-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 600ms var(--ease);
}

.step-body > p {
  overflow: hidden;
  min-height: 0;
  max-width: 42ch;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--ink-sec);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 450ms ease 80ms, transform 450ms var(--ease) 80ms;
}

.journey-step.is-active .step-body {
  grid-template-rows: 1fr;
}

.journey-step.is-active .step-body > p {
  opacity: 1;
  transform: translateY(0);
  padding-top: 0.45rem;
  padding-bottom: 0.55rem;
}

.journey-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.journey-zone {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  font-family: var(--font-mono);
}

.zone-label {
  font-size: var(--text-xs);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.zone-name {
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--coral-deep);
}

.journey-track {
  position: relative;
  flex: 1;
  max-width: 420px;
  height: 1px;
  background: var(--ink-line);
}

.journey-track-fill {
  position: absolute;
  inset: 0;
  transform-origin: left;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--copper), var(--coral-deep));
  box-shadow: 0 0 10px rgba(184, 81, 46, 0.5);
}

/* ============ Statement ============ */
.statement {
  position: relative;
  z-index: 2;
  padding: var(--space-3xl) 0 calc(var(--space-3xl) * 1.2);
}

/* soft paper wash so the statement stays legible over the diorama */
.statement .container {
  position: relative;
}

.statement .container::before {
  content: "";
  position: absolute;
  inset: -8% -12%;
  z-index: -1;
  background: radial-gradient(
    75% 70% at 38% 45%,
    rgba(240, 231, 218, 0.88) 35%,
    rgba(240, 231, 218, 0) 75%
  );
  pointer-events: none;
}

.statement-text {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-2xl);
  line-height: 1.22;
  max-width: 30ch;
  color: var(--ink);
  margin-bottom: var(--space-2xl);
}


.statement-proof {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.proof-item {
  display: grid;
  gap: 0.6rem;
  padding-top: var(--space-md);
  border-top: 1px solid var(--ink-line);
}

.proof-value {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--coral-deep);
}

.proof-label {
  font-size: var(--text-sm);
  color: var(--ink-sec);
  max-width: 34ch;
}

/* ============ Paper (light world) ============ */
.paper {
  position: relative;
  z-index: 3;
  background:
    radial-gradient(
      circle at 12% 0%,
      rgba(178, 108, 61, 0.08),
      transparent 32%
    ),
    radial-gradient(
      circle at 88% 12%,
      rgba(122, 47, 45, 0.05),
      transparent 30%
    ),
    var(--paper-raised);
  color: var(--ink);
  border-radius: 28px 28px 0 0;
  box-shadow: 0 -24px 60px rgba(122, 88, 60, 0.18);
}

.paper .kicker {
  color: var(--accent-ink);
}

.paper .kicker::before {
  background: var(--accent-ink);
}

.paper .section-intro {
  color: var(--ink-sec);
}

.paper ::selection {
  background: var(--accent-ink);
  color: var(--paper);
}

/* Deployments */
.deployments {
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.deploy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  counter-reset: deploy;
}

.deploy-card::before {
  counter-increment: deploy;
  content: "0" counter(deploy);
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--accent-ink);
  opacity: 0.45;
  margin-bottom: var(--space-md);
}

.deploy-card {
  position: relative;
  padding: var(--space-lg) var(--space-lg) var(--space-xl);
  border-left: 1px solid var(--ink-line);
  transition: background 400ms ease;
}

.deploy-card:last-child {
  border-right: 1px solid var(--ink-line);
}

.deploy-card:hover {
  background: rgba(255, 255, 255, 0.35);
}

.deploy-icon {
  display: inline-grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-lg);
  border: 1px solid var(--ink-line);
  border-radius: 50%;
  color: var(--accent-ink);
  transition: transform 500ms var(--ease), background 400ms ease,
    color 400ms ease;
}

.deploy-card:hover .deploy-icon {
  transform: translateY(-4px) rotate(-6deg);
  background: var(--accent-ink);
  color: var(--paper);
}

.deploy-card h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-xl);
  line-height: 1.15;
  margin-bottom: var(--space-sm);
  max-width: 16ch;
}

.deploy-card p {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--ink-sec);
}

/* About */
.about {
  padding: var(--space-2xl) 0 var(--space-xl);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
  gap: clamp(var(--space-xl), 6vw, 7rem);
  align-items: start;
  margin-top: var(--space-xl);
}

.about-text p {
  margin-bottom: var(--space-md);
  color: var(--ink-sec);
  max-width: 62ch;
}

.about-text p.lead {
  font-size: var(--text-lg);
  color: var(--ink);
}

.about-text strong {
  color: var(--ink);
  font-weight: 600;
}

.about-sidebar {
  display: grid;
  gap: var(--space-xl);
  position: sticky;
  top: calc(var(--header-h) + 2rem);
}

.about-portrait-wrap {
  position: relative;
  max-width: 300px;
}

.about-portrait {
  width: 100%;
  height: auto;
  border-radius: 6px;
  filter: saturate(0.92);
  box-shadow: 0 24px 60px rgba(83, 54, 37, 0.25);
}

.portrait-meta {
  display: grid;
  gap: 0.15rem;
  padding-top: var(--space-sm);
}

.portrait-name {
  font-weight: 600;
  color: var(--ink);
}

.portrait-role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-ink);
}

.career-timeline {
  display: grid;
  gap: 0;
  position: relative;
}

.timeline-item {
  position: relative;
  display: flex;
  gap: 1rem;
  padding: 0.7rem 0 0.7rem 1.4rem;
  border-left: 1px solid var(--ink-line);
}

.timeline-dot {
  position: absolute;
  left: -3.5px;
  top: 1.35rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-sec);
}

.timeline-current .timeline-dot {
  background: var(--accent-ink);
  box-shadow: 0 0 0 4px rgba(122, 47, 45, 0.18);
}

.timeline-content {
  display: grid;
  gap: 0.1rem;
}

.timeline-org {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--ink);
}

.timeline-current .timeline-org {
  color: var(--accent-ink);
}

.timeline-role {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--ink-sec);
}

/* Research */
.research {
  padding: var(--space-xl) 0 var(--space-3xl);
}

.paper-card {
  margin-top: var(--space-xl);
  max-width: 880px;
  padding: clamp(1.6rem, 4vw, 3rem);
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--ink-line);
  border-radius: 10px;
  transition: box-shadow 450ms ease, transform 450ms var(--ease);
}

.paper-card:hover {
  box-shadow: 0 30px 70px rgba(83, 54, 37, 0.16);
  transform: translateY(-4px);
}

.paper-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.paper-badge {
  display: inline-block;
  padding: 0.32rem 0.85rem;
  border-radius: 999px;
  background: var(--accent-ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.paper-year {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--ink-sec);
}

.paper-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-xl);
  line-height: 1.2;
  max-width: 30ch;
  margin-bottom: var(--space-md);
}

.paper-authors {
  font-size: var(--text-sm);
  color: var(--ink-sec);
  max-width: 70ch;
  margin-bottom: 0.3rem;
}

.paper-authors strong {
  color: var(--accent-ink);
}

.paper-journal {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--ink-sec);
  margin-bottom: var(--space-lg);
}

.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.paper-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--dur-fast) ease, color var(--dur-fast) ease;
  will-change: transform;
}

.paper-link:hover {
  background: var(--accent-ink);
}

.paper-link-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink-line);
}

.paper-link-secondary:hover {
  background: transparent;
  border-color: var(--accent-ink);
  color: var(--accent-ink);
}

/* ============ FAQ (dark) ============ */
.faq {
  position: relative;
  z-index: 3;
  background: var(--bg-deep);
  color: var(--cream);
  padding: var(--space-3xl) 0 var(--space-2xl);
}

.faq-list {
  margin-top: var(--space-xl);
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: 1.4rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--cream-dim);
  transition: color var(--dur-fast) ease;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question:hover,
.faq-item[open] .faq-question {
  color: var(--cream);
}

.faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color var(--dur-fast) ease, background var(--dur-fast) ease,
    transform 450ms var(--ease);
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 1.5px;
  background: var(--cream);
  transform: translate(-50%, -50%);
  transition: transform 450ms var(--ease), background var(--dur-fast) ease;
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item[open] .faq-icon {
  background: var(--coral);
  border-color: var(--coral);
  transform: rotate(135deg);
}

.faq-item[open] .faq-icon::before,
.faq-item[open] .faq-icon::after {
  background: #1a0f08;
}

.faq-answer {
  overflow: hidden;
}

.faq-answer p {
  max-width: 64ch;
  padding-bottom: 1.5rem;
  color: var(--cream-dim);
}

/* ============ Contact ============ */
.contact {
  position: relative;
  z-index: 3;
  background:
    radial-gradient(
      90% 70% at 50% 110%,
      rgba(217, 119, 87, 0.16),
      transparent 60%
    ),
    var(--bg-deep);
  color: var(--cream);
  padding: var(--space-3xl) 0 var(--space-2xl);
  text-align: center;
}

.contact .kicker {
  justify-content: center;
}

.contact-headline {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-3xl);
  line-height: 1.05;
  margin-inline: auto;
  max-width: 16ch;
  margin-bottom: var(--space-md);
}

.contact-sub {
  color: var(--cream-dim);
  max-width: 52ch;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

.contact-cta {
  margin-bottom: var(--space-lg);
}

.footer-contact {
  padding-block: var(--space-xl) var(--space-lg);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: left;
}

.contact-entry {
  display: grid;
  gap: 0.35rem;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-value {
  font-size: var(--text-sm);
  color: var(--cream);
}

.contact-value a {
  color: var(--cream);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color var(--dur-fast) ease, border-color var(--dur-fast) ease;
}

.contact-value a:hover {
  color: var(--coral-bright);
  border-color: var(--coral);
}

.contact-social {
  display: flex;
  gap: var(--space-md);
}

/* ============ Footer ============ */
.site-footer {
  position: relative;
  z-index: 3;
  background: var(--bg-deep);
  color: var(--cream);
  overflow: hidden;
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding-block: var(--space-lg);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ============ Responsive ============ */
@media (max-width: 1080px) {
  .about-grid {
    grid-template-columns: 1fr;
  }

  .about-sidebar {
    position: static;
    grid-template-columns: minmax(220px, 300px) 1fr;
    align-items: start;
  }

  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 880px) {
  .header-nav {
    display: none;
  }

  .header-actions .btn {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .deploy-grid {
    grid-template-columns: 1fr;
  }

  .deploy-card {
    border-left: 0;
    border-top: 1px solid var(--ink-line);
    padding-inline: 0;
  }

  .deploy-card:last-child {
    border-right: 0;
  }

  .statement-proof {
    grid-template-columns: 1fr;
  }

  .journey-stage {
    padding-bottom: 3vh;
  }

  .journey-steps {
    width: 100%;
  }

  .journey-step.is-active {
    background: rgba(240, 231, 218, 0.72);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    padding-inline: 0.9rem;
    margin-inline: -0.9rem;
  }

  .step-body > p {
    max-width: 56ch;
  }

  .journey-title {
    font-size: var(--text-xl);
  }

  .hero-foot {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .about-sidebar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .journey {
    height: 460svh;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
}