@font-face {
  font-family: "Tektur";
  src: url("assets/fonts/Tektur-Medium.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/fonts/InstrumentSans-Regular.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/fonts/InstrumentSans-Bold.ttf") format("truetype");
  font-display: swap;
  font-weight: 700;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("assets/fonts/InstrumentSerif-Regular.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Geist Mono";
  src: url("assets/fonts/GeistMono-Regular.ttf") format("truetype");
  font-display: swap;
}

:root {
  --bg: #07111e;
  --bg-elevated: rgba(12, 22, 38, 0.94);
  --bg-soft: rgba(11, 20, 33, 0.82);
  --panel: linear-gradient(180deg, rgba(10, 19, 33, 0.96), rgba(6, 11, 19, 0.98));
  --panel-strong: linear-gradient(145deg, rgba(16, 29, 48, 0.96), rgba(8, 14, 25, 0.98));
  --border: rgba(143, 232, 255, 0.14);
  --border-strong: rgba(255, 138, 61, 0.24);
  --text: #eef6ff;
  --muted: rgba(238, 246, 255, 0.72);
  --muted-soft: rgba(238, 246, 255, 0.52);
  --cyan: #8fe8ff;
  --cyan-soft: rgba(143, 232, 255, 0.16);
  --orange: #ff8a3d;
  --orange-soft: rgba(255, 138, 61, 0.14);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 14%, rgba(143, 232, 255, 0.16), transparent 22%),
    radial-gradient(circle at 84% 14%, rgba(255, 138, 61, 0.16), transparent 20%),
    linear-gradient(180deg, #0a1728 0%, #07111e 46%, #050a13 100%);
  color: var(--text);
  font-family: "Instrument Sans", sans-serif;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

body::before {
  background-image:
    linear-gradient(rgba(143, 232, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 232, 255, 0.08) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
}

body::after {
  background:
    radial-gradient(circle at 18% 24%, rgba(255, 255, 255, 0.1) 0 1.2px, transparent 1.2px),
    radial-gradient(circle at 72% 30%, rgba(255, 255, 255, 0.14) 0 1px, transparent 1px),
    radial-gradient(circle at 58% 64%, rgba(255, 255, 255, 0.1) 0 1px, transparent 1px);
  opacity: 0.5;
}

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

a {
  color: inherit;
}

a,
button,
summary {
  transition:
    transform 180ms ease,
    color 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    opacity 180ms ease;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: #fff;
  color: #000;
}

.skip-link:focus {
  top: 1rem;
}

.site-shell {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

.site-header,
.panel,
.signal-chip {
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.site-header {
  position: sticky;
  top: 1rem;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: 0.9rem 1rem;
  border-radius: 24px;
  backdrop-filter: blur(0px);
}

.site-header.is-scrolled {
  backdrop-filter: blur(22px);
  background: rgba(8, 14, 25, 0.9);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  text-decoration: none;
}

.site-brand-mark {
  width: 3.3rem;
  height: 3.3rem;
  border-radius: 18px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
}

.site-brand-copy {
  display: grid;
  gap: 0.15rem;
}

.site-brand-title {
  font-family: "Tektur", sans-serif;
  font-size: 1.3rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-brand-meta {
  color: var(--muted-soft);
  font-family: "Geist Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.7rem;
}

.site-nav a {
  padding: 0.75rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.02);
  color: var(--muted);
}

.site-nav a.is-active,
.site-nav a:hover {
  color: var(--text);
  border-color: rgba(255, 138, 61, 0.38);
  transform: translateY(-1px);
}

main {
  display: grid;
  gap: 4.5rem;
  margin-top: 2rem;
}

.section,
.hero {
  scroll-margin-top: 7rem;
}

.section-grid,
.quickstart-grid {
  display: grid;
  gap: 1.5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 1.5rem;
}

.panel {
  position: relative;
  overflow: hidden;
  border-radius: 32px;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 22px;
  pointer-events: none;
}

.hero-copy {
  padding: 3.2rem;
  background:
    radial-gradient(circle at top left, rgba(143, 232, 255, 0.18), transparent 28%),
    radial-gradient(circle at right 20%, rgba(255, 138, 61, 0.16), transparent 22%),
    var(--panel-strong);
}

.eyebrow,
.card-kicker,
.signal-label {
  margin: 0 0 0.8rem;
  color: var(--cyan);
  font-family: "Geist Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.narrative-panel h2 {
  margin: 0;
  font-family: "Tektur", sans-serif;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(3rem, 5.6vw, 5rem);
  line-height: 0.88;
}

.hero-subtitle {
  margin: 1.2rem 0 0;
  max-width: 30rem;
  color: var(--text);
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.35rem, 2vw, 1.65rem);
  line-height: 1.25;
}

.hero-body,
.section-heading p,
.info-card p,
.use-card p,
.stack-card strong,
.faq-list p,
.footer-note,
.narrative-panel p {
  color: var(--muted);
  line-height: 1.7;
}

.hero-body {
  max-width: 40rem;
  margin: 1.35rem 0 0;
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-family: "Geist Mono", monospace;
  font-size: 0.86rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(90deg, var(--cyan), #baf3ff);
  color: #04111d;
}

.button-secondary {
  background: rgba(255, 138, 61, 0.12);
  border-color: rgba(255, 138, 61, 0.34);
}

.button-tertiary {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.08);
}

.disclaimer {
  margin: 1.4rem 0 0;
  color: var(--muted-soft);
  font-family: "Geist Mono", monospace;
  font-size: 0.86rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-visual {
  padding: 1.4rem;
  display: grid;
  place-items: stretch;
}

.signal-card {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  gap: 1rem;
  height: 100%;
  padding: 1rem;
  border-radius: 24px;
  background:
    radial-gradient(circle at center, rgba(143, 232, 255, 0.1), transparent 34%),
    linear-gradient(180deg, rgba(8, 15, 24, 0.9), rgba(6, 11, 18, 0.98));
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.signal-mark {
  display: grid;
  place-items: center;
  border-radius: 24px;
  background:
    linear-gradient(rgba(143, 232, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 232, 255, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(13, 25, 41, 0.9), rgba(7, 13, 21, 0.98));
  background-size: 48px 48px, 48px 48px, auto;
  min-height: 360px;
}

.signal-mark img {
  width: min(84%, 430px);
  height: auto;
}

.signal-terminal {
  display: grid;
  gap: 0.75rem;
  padding: 1.1rem 1.15rem;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.03);
  font-family: "Geist Mono", monospace;
}

.terminal-line {
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.5;
}

.terminal-line span {
  color: var(--orange);
  margin-right: 0.65rem;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.signal-chip {
  padding: 1.3rem 1.15rem;
  border-radius: 24px;
}

.signal-chip strong {
  display: block;
  font-size: 1rem;
  line-height: 1.45;
}

.section {
  display: grid;
  gap: 1.5rem;
}

.section-heading {
  max-width: 52rem;
}

.section-heading h2,
.narrative-panel h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 0.96;
}

.section-heading p {
  margin: 1rem 0 0;
  font-size: 1rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
}

.card-grid-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-card,
.use-card,
.narrative-panel,
.stack-panel,
.command-panel,
.steps-panel,
.site-footer {
  padding: 1.6rem;
}

.info-card h3,
.use-card h3 {
  margin: 0 0 0.7rem;
  font-family: "Instrument Serif", serif;
  font-size: 1.5rem;
  font-weight: 400;
}

#why-it-matters {
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
}

.bullet-list,
.step-list {
  margin: 1rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
  line-height: 1.8;
}

.stack-panel {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.stack-card {
  padding: 1.25rem;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background:
    radial-gradient(circle at top right, rgba(255, 138, 61, 0.12), transparent 28%),
    rgba(255, 255, 255, 0.03);
}

.stack-card span {
  display: block;
  margin-bottom: 0.65rem;
  font-family: "Geist Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.quickstart-grid {
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
}

.command-panel pre {
  margin: 0;
  overflow: auto;
  padding: 1.2rem;
  border-radius: 22px;
  background: rgba(0, 0, 0, 0.24);
  color: #d3f6ff;
  font-family: "Geist Mono", monospace;
  font-size: 0.95rem;
  line-height: 1.7;
}

.step-list strong {
  color: var(--text);
}

.faq-list {
  display: grid;
  gap: 1rem;
}

.faq-list details {
  padding: 1.1rem 1.25rem;
}

.faq-list summary {
  cursor: pointer;
  font-family: "Instrument Serif", serif;
  font-size: 1.4rem;
  list-style: none;
}

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

.faq-list p {
  margin: 0.9rem 0 0;
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.footer-branding {
  display: grid;
  gap: 0.85rem;
  justify-items: end;
}

.footer-wordmark {
  width: min(320px, 100%);
  height: 72px;
  object-fit: cover;
  object-position: left center;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(255, 255, 255, 0.02);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-links a {
  padding: 0.75rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.footer-links a:hover {
  border-color: rgba(255, 138, 61, 0.34);
}

.footer-note span {
  color: var(--text);
}

@media (max-width: 1080px) {
  .hero,
  #why-it-matters,
  .quickstart-grid,
  .card-grid-four {
    grid-template-columns: 1fr;
  }

  .signal-strip,
  .card-grid-three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .footer-branding {
    justify-items: start;
  }
}

@media (max-width: 720px) {
  .site-shell {
    width: min(var(--max-width), calc(100% - 1rem));
    padding-top: 0.6rem;
  }

  .site-header {
    top: 0.5rem;
    padding: 0.85rem;
    border-radius: 20px;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .site-brand-copy {
    gap: 0.1rem;
  }

  .site-nav a,
  .button,
  .footer-links a {
    width: 100%;
  }

  .hero-copy,
  .info-card,
  .use-card,
  .narrative-panel,
  .stack-panel,
  .command-panel,
  .steps-panel,
  .site-footer {
    padding: 1.25rem;
  }

  .hero h1 {
    font-size: clamp(2.9rem, 18vw, 4rem);
  }

  .signal-mark {
    min-height: 280px;
  }

  .signal-strip,
  .card-grid-three,
  .card-grid-four {
    grid-template-columns: 1fr;
  }

  .section-heading h2,
  .narrative-panel h2 {
    font-size: clamp(1.75rem, 10vw, 2.4rem);
  }

  .faq-list summary {
    font-size: 1.2rem;
  }
}