/* ========================================================================
   Hyperscale AI Labs — design system
   Dark museum ground, hairline column rules, high-contrast serif display,
   monospace micro-labels. Scroll-driven reveals.
   ======================================================================== */

:root {
  --bg:        #07080a;
  --bg-raise:  #0c0e12;
  --fg:        #f4f5f7;
  --fg-dim:    #8b9199;
  --fg-faint:  #464c55;
  --rule:      rgba(255, 255, 255, .07);
  --rule-lit:  rgba(255, 255, 255, .16);
  --accent:    #5b83ff;
  --accent-dim:#2a3c73;

  --serif: "Instrument Serif", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --gutter: clamp(1.25rem, 4vw, 4rem);
  --maxw: 1600px;
  --nav-h: 4.5rem;

  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .3s var(--ease);
}

::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--accent);
  color: #fff;
  padding: .75rem 1.25rem;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.skip-link:focus { left: 0; }

/* ---------------------------------------------------------------- layout */

.shell {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* Fixed hairline columns — the museum grid, drawn behind everything. */
.grid-rules {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.grid-rules span {
  border-left: 1px solid var(--rule);
}
.grid-rules span:last-child {
  border-right: 1px solid var(--rule);
}
@media (max-width: 720px) {
  .grid-rules { grid-template-columns: repeat(2, 1fr); }
}

/* ------------------------------------------------------------------- nav */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: linear-gradient(to bottom, rgba(7,8,10,.88), rgba(7,8,10,.4) 70%, transparent);
  transition: transform .5s var(--ease);
}
.nav[data-hidden="true"] { transform: translateY(-100%); }

.nav .shell {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  font-family: var(--serif);
  font-size: 1.375rem;
  letter-spacing: .02em;
  white-space: nowrap;
}
.brand em {
  font-style: normal;
  color: var(--fg-dim);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 3rem);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  position: relative;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fg-dim);
  padding: .5rem 0;
  display: block;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .45s var(--ease);
}
.nav-links a:hover { color: var(--fg); }
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after { transform: scaleX(1); }
.nav-links a[aria-current="page"] { color: var(--fg); }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: var(--fg);
  cursor: pointer;
  padding: .5rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: rgba(7,8,10,.97);
    backdrop-filter: blur(20px);
    padding: 1rem var(--gutter) 2rem;
    border-bottom: 1px solid var(--rule);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s var(--ease), transform .3s var(--ease);
  }
  .nav-links[data-open="true"] {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }
  .nav-links a { font-size: .8125rem; padding: .9rem 0; }
}

/* ---------------------------------------------------------------- typography */

.display {
  font-family: var(--serif);
  font-weight: 400;
  line-height: .95;
  letter-spacing: -.02em;
  margin: 0;
}
.d1 { font-size: clamp(3rem, 11vw, 10.5rem); }
.d2 { font-size: clamp(2.5rem, 7.5vw, 6.5rem); }
.d3 { font-size: clamp(1.875rem, 4vw, 3.5rem); line-height: 1.05; }

.label {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0;
}
.label--accent { color: var(--accent); }

.lede {
  font-size: clamp(1.0625rem, 1.5vw, 1.375rem);
  line-height: 1.5;
  color: var(--fg-dim);
  max-width: 46ch;
}

.body-col {
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--fg-dim);
  max-width: 42ch;
}
.body-col p + p { margin-top: 1.2em; }
.body-col strong { color: var(--fg); font-weight: 500; }

/* Word-by-word scroll reveal (see site.js). */
.reveal-words .w {
  color: var(--fg-faint);
  transition: color .5s var(--ease);
}
.reveal-words .w[data-lit="1"] { color: var(--fg); }

/* Simple fade-and-rise for blocks. */
.rise {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.rise[data-in="1"] { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- hero */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding-bottom: clamp(3rem, 8vh, 7rem);
  padding-top: calc(var(--nav-h) + 2rem);
  z-index: 1;
}

#globe {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: auto;
}
#globe canvas { display: block; }

/* Keeps hero copy legible where it crosses the globe. Sits above the canvas
   (z-index 0) but below the hero content, and never swallows drag events. */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(to bottom,
    transparent 0%,
    rgba(7, 8, 10, .55) 38%,
    rgba(7, 8, 10, .88) 68%,
    var(--bg) 100%);
}
@media (min-width: 900px) {
  .hero::before {
    background: linear-gradient(to bottom, transparent 40%, rgba(7, 8, 10, .72) 82%, var(--bg) 100%);
  }
}

.hero .shell {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: end;
}
@media (min-width: 900px) {
  .hero .shell { grid-template-columns: 1.6fr 1fr; gap: 4rem; }
}

.hero-title {
  font-size: clamp(2.25rem, 6.4vw, 6.5rem);
  margin-bottom: .5rem;
}
@media (max-height: 760px) and (min-width: 900px) {
  .hero-title { font-size: clamp(2rem, 4.6vw, 4.5rem); }
  .hero-meta { margin-top: 1.25rem; padding-top: 1rem; }
}
.hero-title > span { display: block; }
.hero-title .sub { color: var(--fg-dim); }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}
.hero-meta div { min-width: 7rem; }
.hero-meta dt {
  font-family: var(--mono);
  font-size: .625rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0 0 .4rem;
}
.hero-meta dd {
  margin: 0;
  font-size: .875rem;
  color: var(--fg);
}

.scroll-cue {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: .5625rem;
  letter-spacing: .25em;
  text-transform: uppercase;
  color: var(--fg-faint);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  z-index: 2;
}
.scroll-cue::after {
  content: "";
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(to bottom, var(--fg-faint), transparent);
  animation: cue 2.4s var(--ease) infinite;
}
@keyframes cue {
  0%   { transform: scaleY(0); transform-origin: top; }
  45%  { transform: scaleY(1); transform-origin: top; }
  55%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* Scrim so text stays legible over the globe. */
.scrim {
  position: relative;
  z-index: 1;
  background: linear-gradient(to bottom, transparent, var(--bg) 18%, var(--bg));
}

/* ---------------------------------------------------------------- sections */

section { position: relative; z-index: 1; }

.sec {
  padding: clamp(5rem, 14vh, 11rem) 0;
  border-top: 1px solid var(--rule);
}
.sec:first-of-type { border-top: 0; }

.sec-head {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
  align-items: start;
  margin-bottom: clamp(3rem, 7vh, 6rem);
}
@media (min-width: 900px) {
  .sec-head { grid-template-columns: 1fr 1fr; gap: 4rem; }
}

.sec-index {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.sec-index .num {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--accent);
}
.sec-index .rule {
  flex: 1;
  height: 1px;
  background: var(--rule);
}

/* ---------------------------------------------------------------- capability grid */

.cap-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (min-width: 640px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .cap-grid { grid-template-columns: repeat(4, 1fr); } }

.cap {
  background: var(--bg);
  padding: 2rem 1.75rem 2.5rem;
  transition: background .5s var(--ease);
}
.cap:hover { background: var(--bg-raise); }
.cap h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.5rem;
  line-height: 1.15;
  margin: 1.75rem 0 .75rem;
}
.cap p {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.65;
  color: var(--fg-dim);
}

/* ---------------------------------------------------------------- metrics */

.metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem 1rem;
}
@media (min-width: 900px) { .metrics { grid-template-columns: repeat(4, 1fr); } }

.metric .fig {
  font-family: var(--serif);
  font-size: clamp(2.75rem, 6vw, 5rem);
  line-height: 1;
  letter-spacing: -.02em;
  display: block;
}
.metric .fig sup {
  font-size: .35em;
  vertical-align: super;
  color: var(--accent);
  letter-spacing: 0;
}
.metric p {
  margin: 1rem 0 0;
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--fg-dim);
  max-width: 24ch;
}

/* ---------------------------------------------------------------- work / CV */

.role {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding: clamp(2.5rem, 6vh, 4.5rem) 0;
  border-top: 1px solid var(--rule);
}
@media (min-width: 900px) {
  .role { grid-template-columns: 1fr 1.4fr; gap: 4rem; }
}

.role-id .org {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3.2vw, 3rem);
  line-height: 1.05;
  margin: .5rem 0 1rem;
  display: block;
}
.role-id .title {
  font-size: .875rem;
  color: var(--fg);
  display: block;
  margin-bottom: .35rem;
}
.role-id .years {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--fg-faint);
}

.role-body > p:first-child {
  color: var(--fg);
  font-size: 1.0625rem;
  line-height: 1.55;
  margin: 0 0 1.75rem;
  max-width: 50ch;
}

.bullets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}
.bullets li {
  position: relative;
  padding-left: 2rem;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--fg-dim);
  max-width: 62ch;
}
.bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 1rem;
  height: 1px;
  background: var(--accent-dim);
}
.bullets strong { color: var(--fg); font-weight: 500; }

/* ---------------------------------------------------------------- projects */

.proj-list {
  border-top: 1px solid var(--rule);
}

.proj {
  display: block;
  position: relative;
  border-bottom: 1px solid var(--rule);
  padding: clamp(1.75rem, 4vh, 3rem) 0;
  transition: padding-left .6s var(--ease);
}
.proj:hover { padding-left: 1.5rem; }
.proj::before {
  content: "";
  position: absolute;
  left: -100vw; right: -100vw;
  top: 0; bottom: 0;
  background: var(--bg-raise);
  opacity: 0;
  transition: opacity .5s var(--ease);
  z-index: -1;
}
.proj:hover::before { opacity: 1; }

.proj-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: baseline;
}
@media (min-width: 900px) {
  .proj-row { grid-template-columns: 3rem 1.1fr 1.4fr auto; gap: 2rem; }
}

.proj .idx {
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--fg-faint);
}
.proj h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 2.6vw, 2.25rem);
  line-height: 1.1;
  margin: 0;
  transition: color .4s var(--ease);
}
.proj:hover h3 { color: var(--accent); }
.proj .desc {
  margin: 0;
  font-size: .875rem;
  line-height: 1.6;
  color: var(--fg-dim);
  max-width: 48ch;
}
.proj-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: .85rem;
}
.tag {
  font-family: var(--mono);
  font-size: .5938rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--fg-faint);
  border: 1px solid var(--rule-lit);
  border-radius: 999px;
  padding: .3rem .6rem;
}
.proj .arrow {
  font-family: var(--mono);
  font-size: .875rem;
  color: var(--fg-faint);
  transition: transform .5s var(--ease), color .4s var(--ease);
  display: inline-block;
}
.proj:hover .arrow { transform: translate(4px, -4px); color: var(--accent); }

/* ---------------------------------------------------------------- links / buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  font-family: var(--mono);
  font-size: .6875rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--fg);
  border: 1px solid var(--rule-lit);
  padding: .95rem 1.6rem;
  border-radius: 999px;
  transition: border-color .4s var(--ease), background .4s var(--ease), color .4s var(--ease);
}
.btn:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}
.btn .arrow { transition: transform .4s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.link-u {
  color: var(--fg);
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 1px;
  transition: border-color .4s var(--ease), color .4s var(--ease);
}
.link-u:hover { border-color: var(--accent); color: var(--accent); }

/* ---------------------------------------------------------------- footer */

.foot {
  position: relative;
  z-index: 1;
  background: var(--bg);
  border-top: 1px solid var(--rule);
  padding: clamp(4rem, 10vh, 7rem) 0 2.5rem;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}
@media (min-width: 900px) {
  .foot-grid { grid-template-columns: 1.5fr 1fr 1fr; gap: 4rem; }
}
.foot h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1;
  margin: 1.5rem 0 2rem;
}
.foot-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}
.foot-list a {
  font-size: .875rem;
  color: var(--fg-dim);
}
.foot-list a:hover { color: var(--fg); }

.foot-base {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: .625rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

/* ---------------------------------------------------------------- misc */

.page-head {
  padding: calc(var(--nav-h) + clamp(4rem, 14vh, 9rem)) 0 clamp(3rem, 8vh, 6rem);
}

.loader {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: var(--bg);
  display: grid;
  place-items: center;
  transition: opacity .8s var(--ease), visibility .8s;
}
.loader[data-done="1"] { opacity: 0; visibility: hidden; }
.loader-arc {
  width: 6rem; height: 6rem;
  border-radius: 50%;
  border: 1px solid var(--rule);
  border-top-color: var(--fg);
  animation: spin 1.1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* The cue collides with the hero meta on short screens. */
@media (max-width: 720px), (max-height: 860px) {
  .scroll-cue { display: none; }
}
@media (max-width: 480px) {
  .hero .label { letter-spacing: .12em; font-size: .625rem; }
  .hero-meta { gap: 1.1rem 1.75rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .rise { opacity: 1; transform: none; }
  .reveal-words .w { color: var(--fg); }
}