@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@500&family=IBM+Plex+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@500;700&display=swap");

:root {
  --bg: #0d1117;
  --bg-elevated: rgba(18, 25, 36, 0.72);
  --bg-strong: rgba(16, 22, 32, 0.9);
  --panel: rgba(13, 18, 28, 0.76);
  --panel-soft: rgba(255, 255, 255, 0.04);
  --text: #edf2f7;
  --muted: #9ca9bb;
  --line: rgba(255, 255, 255, 0.09);
  --accent: #f6a13d;
  --accent-2: #51c8c3;
  --accent-3: #7f8cff;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(127, 140, 255, 0.12), transparent 24%),
    radial-gradient(circle at 82% 12%, rgba(246, 161, 61, 0.15), transparent 18%),
    radial-gradient(circle at 70% 90%, rgba(81, 200, 195, 0.12), transparent 22%),
    linear-gradient(180deg, #091018 0%, #0d1117 100%);
  font-family: "IBM Plex Sans", sans-serif;
  line-height: 1.6;
  scroll-snap-type: y proximity;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.background-layer,
.background-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

.background-a {
  background: radial-gradient(circle at 15% 18%, rgba(127, 140, 255, 0.1), transparent 30%);
  animation: drift-a 16s ease-in-out infinite alternate;
}

.background-b {
  background: radial-gradient(circle at 80% 22%, rgba(246, 161, 61, 0.09), transparent 26%);
  animation: drift-b 18s ease-in-out infinite alternate;
}

.background-grid {
  z-index: -1;
  opacity: 0.45;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 88%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: min(var(--max-width), calc(100vw - 32px));
  margin: 0 auto;
  padding: 18px 0 0;
}

.brand,
.header-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 10, 16, 0.72);
  backdrop-filter: blur(14px);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, #ffcf80 100%);
  color: #141312;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.brand-text,
.header-link,
.site-nav a {
  font-size: 0.95rem;
  font-weight: 600;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 10, 16, 0.72);
  backdrop-filter: blur(14px);
}

.site-nav a {
  color: var(--muted);
  padding: 10px 14px;
  border-radius: 999px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a:hover,
.project-links a:hover,
.footer-links a:hover {
  color: var(--text);
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.05);
}

.page-shell {
  width: min(var(--max-width), calc(100vw - 32px));
  margin: 0 auto;
  padding: 20px 0 56px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(17, 23, 35, 0.82), rgba(11, 16, 25, 0.88));
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.snap-section {
  scroll-snap-align: start;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.78fr);
  gap: 24px;
  min-height: calc(100svh - 96px);
  padding: 42px;
  align-items: stretch;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 28px;
}

.eyebrow,
.signal-label,
.panel-kicker,
.project-status,
.project-host,
.rail-title,
.footer-title {
  margin: 0;
  color: var(--accent);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", sans-serif;
  line-height: 1;
  letter-spacing: -0.04em;
}

h1 {
  max-width: 13ch;
  margin-bottom: 18px;
  font-size: clamp(3.4rem, 8vw, 6.2rem);
}

h2 {
  max-width: 18ch;
  margin-bottom: 0;
  font-size: clamp(2.2rem, 4.8vw, 3.6rem);
}

h3 {
  margin-bottom: 12px;
  font-size: 1.7rem;
}

.hero-intro,
.about-copy p,
.project-body p,
.project-points li,
.mini-panel p,
.principle-card p,
.rail-card p,
.footer-copy {
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-intro {
  max-width: 58ch;
}

.hero-actions,
.project-links,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
}

.button-primary {
  color: #101216;
  background: linear-gradient(135deg, var(--accent) 0%, #ffd190 100%);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.hero-signals {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.signal-card,
.rail-card,
.mini-panel,
.project-card,
.principle-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel-soft);
}

.signal-card {
  padding: 18px;
}

.signal-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1rem;
  line-height: 1.45;
}

.hero-rail {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.rail-card {
  padding: 24px;
}

.rail-list {
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.rail-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.rail-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.rail-list span {
  color: var(--muted);
  font-size: 0.92rem;
}

.rail-list a,
.project-links a,
.footer-links a {
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.25);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 2px;
}

.section-block {
  margin-top: 22px;
  padding: 36px;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 26px;
}

.about-grid,
.platform-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 22px;
  align-items: start;
}

.about-panels,
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.mini-panel,
.principle-card {
  padding: 22px;
}

.mini-panel h3,
.principle-card h3 {
  margin-top: 10px;
  margin-bottom: 10px;
}

.project-stack {
  display: grid;
  gap: 18px;
}

.project-card {
  display: grid;
  grid-template-columns: minmax(220px, 0.4fr) minmax(0, 1fr);
  gap: 22px;
  padding: 24px;
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.project-host {
  color: var(--accent-2);
  letter-spacing: 0.04em;
}

.project-body p {
  max-width: 62ch;
}

.project-points {
  padding-left: 18px;
  margin-bottom: 22px;
}

.platform-copy p + p {
  margin-top: 14px;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  width: min(var(--max-width), calc(100vw - 32px));
  margin: 22px auto 0;
  padding: 0 4px 28px;
}

.footer-copy {
  max-width: 48ch;
  margin-bottom: 0;
}

@keyframes drift-a {
  from {
    transform: translate3d(-2%, -2%, 0) scale(1);
  }
  to {
    transform: translate3d(2%, 1%, 0) scale(1.06);
  }
}

@keyframes drift-b {
  from {
    transform: translate3d(1%, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-2%, 2%, 0) scale(1.04);
  }
}

@media (max-width: 1120px) {
  .hero,
  .about-grid,
  .platform-layout,
  .project-card {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-signals,
  .principles-grid,
  .about-panels,
  .platform-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  h1 {
    max-width: 14ch;
  }
}

@media (max-width: 760px) {
  body {
    scroll-snap-type: none;
  }

  .site-header,
  .site-footer {
    width: min(var(--max-width), calc(100vw - 20px));
  }

  .page-shell {
    width: min(var(--max-width), calc(100vw - 20px));
    padding-top: 14px;
  }

  .site-header {
    position: static;
    flex-direction: column;
    align-items: stretch;
    padding-top: 14px;
  }

  .site-nav {
    justify-content: space-between;
  }

  .hero,
  .section-block {
    padding: 22px;
  }

  .hero-signals,
  .principles-grid,
  .about-panels,
  .platform-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.8rem, 14vw, 4.6rem);
  }

  h2 {
    max-width: none;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}