:root {
  --ink: #0b0908;
  --raised: #100d0b;
  --accent: #F98E0A;
  --text: #f7f3ee;
  --text-2: #c3bab0;
  --text-3: #a89f95;
  --text-4: #8a817a;
  --text-5: #6f665e;
  --hair-1: rgba(255, 255, 255, 0.1);
  --hair-2: rgba(255, 255, 255, 0.14);
  --hair-3: rgba(255, 255, 255, 0.16);
  --outline: rgba(255, 255, 255, 0.22);

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --container: 1320px;
  --header-h: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-display);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: #ffffff;
}

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

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

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 40px;
  padding-right: 40px;
}

.section {
  padding-top: 104px;
  padding-bottom: 104px;
}

/* focus visibility for keyboard users */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* anchor targets shouldn't hide under the sticky header */
section[id] {
  scroll-margin-top: var(--header-h);
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 9, 8, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hair-1);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  color: var(--text);
}

.brand:hover {
  color: var(--text);
}

.brand-mark {
  height: 32px;
}

.brand span {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--text-4);
}

.site-nav a:hover {
  color: #ffffff;
}

.nav-cta {
  background: var(--accent);
  color: var(--ink) !important;
  font-weight: 700;
  padding: 9px 15px;
}

.nav-cta:hover {
  color: var(--ink) !important;
  background: #ffffff;
}

/* ---------- shared type ---------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 36px;
}

.eyebrow-ink {
  color: var(--ink);
  font-weight: 700;
  opacity: 0.7;
  margin-bottom: 28px;
}

h2 {
  font-size: clamp(34px, 4.6vw, 62px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 700;
  text-transform: uppercase;
  margin: 0 0 64px;
}

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

.hero {
  padding-top: 88px;
  padding-bottom: 72px;
}

.hero-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 40px;
}

.hero h1 {
  font-size: clamp(52px, 8vw, 120px);
  line-height: 0.88;
  letter-spacing: -0.045em;
  font-weight: 700;
  margin: 0;
  text-transform: uppercase;
  text-wrap: balance;
}

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

.hero-mark {
  height: clamp(120px, 17vw, 250px);
  flex: 0 0 auto;
}

.hero-foot {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: end;
  border-top: 1px solid var(--hair-2);
  padding-top: 36px;
}

.hero-lede {
  font-size: 21px;
  line-height: 1.5;
  color: var(--text-2);
  margin: 0;
  max-width: 48ch;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

.button {
  display: inline-block;
  font-weight: 700;
  font-size: 16px;
}

.button-primary {
  background: var(--accent);
  color: var(--ink) !important;
  padding: 17px 30px;
}

.button-primary:hover {
  background: #ffffff;
  color: var(--ink) !important;
}

.button-outline {
  color: var(--text) !important;
  font-weight: 500;
  padding: 17px 26px;
  border: 1px solid var(--outline);
}

.button-outline:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

/* ---------- marquee ---------- */

.marquee {
  border-top: 1px solid var(--hair-1);
  border-bottom: 1px solid var(--hair-1);
  background: var(--raised);
  padding: 18px 0;
  overflow: hidden;
  white-space: nowrap;
}

.marquee-track {
  display: inline-block;
  animation: slips-marquee 42s linear infinite;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-5);
}

.marquee .dot {
  color: var(--accent);
}

@keyframes slips-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track {
    animation: none;
  }
}

/* ---------- how it decides ---------- */

.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 48px;
}

.how-card {
  border-top: 3px solid var(--hair-2);
  padding-top: 24px;
}

.how-card-lead {
  border-top-color: var(--accent);
}

.how-num {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  margin-bottom: 20px;
}

.how-card-lead .how-num {
  color: var(--accent);
}

.how-card h3 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  text-transform: uppercase;
}

.how-card p {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-3);
  margin: 0;
}

.evidence-block {
  margin-top: 56px;
  border: 1px solid var(--hair-2);
  padding: 36px 40px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 32px;
  align-items: center;
}

.evidence-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

.evidence-text {
  font-size: clamp(19px, 2vw, 27px);
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--text);
}

/* ---------- quick start ---------- */

.run-section {
  background: var(--accent);
  color: var(--ink);
  padding-top: 104px;
  padding-bottom: 104px;
}

.run-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
  align-items: start;
}

.run-section h2 {
  font-size: clamp(38px, 5vw, 72px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin: 0 0 24px;
}

.run-lede {
  font-size: 19px;
  line-height: 1.5;
  margin: 0 0 28px;
  max-width: 38ch;
  font-weight: 500;
}

.os-tabs {
  display: flex;
  gap: 2px;
  margin-bottom: 20px;
}

.os-tab {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 11px 16px;
  cursor: pointer;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
}

.os-tab.active {
  background: var(--ink);
  color: var(--accent);
}

.install-alts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  border-top: 1px solid rgba(11, 9, 8, 0.25);
  padding-top: 16px;
}

.install-alts a {
  color: var(--ink);
}

.install-alts a:hover {
  color: #ffffff;
}

.terminal {
  background: var(--ink);
  color: var(--text);
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.35);
}

.terminal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--hair-2);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-4);
}

.copy-button {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  border: 1px solid var(--hair-2);
  color: var(--text-3);
  padding: 5px 10px;
  cursor: pointer;
}

.copy-button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.terminal-body {
  margin: 0;
  padding: 20px 18px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.8;
  color: #e9e1d8;
  white-space: pre-wrap;
  word-break: break-word;
}

.terminal-body .prompt {
  color: var(--accent);
}

.terminal-note {
  margin: 0;
  padding: 0 18px 20px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-4);
}

.terminal-note code {
  font-family: var(--font-mono);
  color: var(--text-3);
}

/* ---------- features ---------- */

.features-section {
  border-bottom: 1px solid var(--hair-1);
}

.features-wrap {
  padding-bottom: 104px;
}

.features-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--hair-2);
  border: 1px solid var(--hair-2);
}

.feature-card {
  background: var(--ink);
  padding: 36px 32px 40px;
  flex: 1 1 320px;
}

.feature-card:hover {
  background: var(--accent);
  color: var(--ink);
}

.feature-card:hover p,
.feature-card:hover .feature-kicker {
  opacity: 1;
}

.feature-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 16px;
  opacity: 0.6;
}

.feature-card h3 {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}

.feature-card p {
  font-size: 16px;
  line-height: 1.55;
  margin: 0;
  opacity: 0.75;
}

.feature-card code {
  font-family: var(--font-mono);
}

/* ---------- on stage ---------- */

.stage-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 24px 4px;
  border-top: 1px solid var(--hair-2);
  color: var(--text);
}

.stage-row-last {
  border-bottom: 1px solid var(--hair-2);
}

.stage-row:hover {
  color: var(--accent);
}

.stage-year {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--text-5);
}

.stage-title {
  font-size: clamp(19px, 2vw, 26px);
  letter-spacing: -0.02em;
  font-weight: 500;
}

.stage-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-5);
}

/* ---------- contribute ---------- */

.contribute-section {
  background: var(--raised);
  border-top: 1px solid var(--hair-1);
  padding-top: 96px;
  padding-bottom: 96px;
}

.contribute-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.contribute-grid h2 {
  font-size: clamp(30px, 3.6vw, 50px);
  line-height: 1;
  letter-spacing: -0.035em;
  margin: 0 0 20px;
}

.contribute-lede {
  font-size: 18px;
  line-height: 1.55;
  color: var(--text-3);
  margin: 0 0 28px;
  max-width: 44ch;
}

.credits {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-3);
}

.credits-name {
  color: var(--text);
}

.credits-more {
  color: var(--text-5);
}

/* ---------- funders ---------- */

.funders-section {
  border-top: 1px solid var(--hair-1);
  padding-top: 96px;
  padding-bottom: 96px;
}

.funders-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
  margin-bottom: 52px;
}

.funders-head h2 {
  font-size: clamp(30px, 3.6vw, 50px);
  line-height: 1;
  letter-spacing: -0.035em;
  margin: 0;
}

.funders-lede {
  font-size: 19px;
  line-height: 1.55;
  color: var(--text-2);
  margin: 0;
  max-width: 46ch;
  text-wrap: pretty;
}

.funder-lead {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: end;
  border: 1px solid var(--hair-3);
  background: var(--raised);
  padding: 40px 40px 44px;
  color: var(--text);
  margin-bottom: 16px;
}

.funder-lead:hover {
  border-color: var(--accent);
  color: var(--text);
}

.funder-kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.funder-name {
  display: block;
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 14px;
}

.funder-desc {
  display: block;
  font-size: 17px;
  line-height: 1.55;
  color: var(--text-3);
  max-width: 64ch;
}

.funder-link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-5);
  white-space: nowrap;
}

.funders-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.funder-card {
  flex: 1 1 250px;
  border: 1px solid var(--hair-3);
  background: var(--raised);
  padding: 30px 28px 32px;
  color: var(--text);
  display: block;
}

.funder-card:hover {
  border-color: var(--accent);
  color: var(--text);
}

.funder-card-name {
  display: block;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 10px;
}

.funder-card-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--text-4);
}

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

.site-footer {
  border-top: 1px solid var(--hair-1);
}

.site-footer .wrap {
  padding-top: 56px;
  padding-bottom: 56px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--text-5);
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero-foot,
  .run-grid,
  .contribute-grid,
  .funders-head {
    grid-template-columns: 1fr;
  }

  .hero-foot {
    align-items: start;
    gap: 28px;
  }

  .contribute-grid {
    gap: 40px;
  }

  .funders-head {
    gap: 24px;
  }
}

@media (max-width: 760px) {
  .header-inner {
    gap: 12px;
  }

  .site-nav {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .site-nav a:not(.nav-cta) {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .hero-mark {
    height: clamp(90px, 30vw, 140px);
  }

  .wrap {
    padding-left: 20px;
    padding-right: 20px;
  }

  .section,
  .contribute-section,
  .funders-section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .run-section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .evidence-block {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .stage-row {
    grid-template-columns: auto 1fr;
    row-gap: 6px;
  }

  .stage-tag {
    grid-column: 2;
  }
}