@font-face {
  font-family: "Tektur";
  src: url("assets/fonts/Tektur-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Tektur";
  src: url("assets/fonts/Tektur-Medium.ttf") format("truetype");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/fonts/InstrumentSans-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("assets/fonts/InstrumentSerif-Regular.ttf") format("truetype");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #090b10;
  --bg-soft: rgba(17, 20, 28, 0.88);
  --panel: rgba(18, 22, 31, 0.72);
  --panel-strong: rgba(24, 29, 40, 0.94);
  --line: rgba(162, 175, 202, 0.18);
  --text: #f4f6fb;
  --text-soft: rgba(244, 246, 251, 0.7);
  --signal: #dfff4f;
  --signal-soft: #8af3cf;
  --metal: #7a8098;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shell-width: min(1180px, calc(100vw - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Instrument Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(138, 243, 207, 0.12), transparent 24%),
    radial-gradient(circle at 85% 18%, rgba(223, 255, 79, 0.18), transparent 22%),
    linear-gradient(180deg, #07090d 0%, #0a0d13 54%, #06080c 100%);
}

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

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

button,
summary {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 18px;
  top: 18px;
  padding: 12px 16px;
  border-radius: 999px;
  background: var(--signal);
  color: #06080c;
  transform: translateY(-180%);
  transition: transform 180ms ease;
  z-index: 20;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-shell {
  position: relative;
  overflow: clip;
}

.ambient,
.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.ambient-one {
  background:
    radial-gradient(circle at 10% 20%, rgba(223, 255, 79, 0.08), transparent 24%),
    radial-gradient(circle at 80% 10%, rgba(122, 128, 152, 0.18), transparent 30%);
  filter: blur(10px);
}

.ambient-two {
  background:
    radial-gradient(circle at 80% 78%, rgba(138, 243, 207, 0.08), transparent 24%),
    radial-gradient(circle at 12% 86%, rgba(110, 122, 180, 0.1), transparent 28%);
}

.grid-overlay {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.42), rgba(0, 0, 0, 0));
}

.topbar,
.section,
.footer {
  width: var(--shell-width);
  margin-inline: auto;
}

.topbar {
  position: sticky;
  top: 12px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 18px;
  padding: 16px 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 22px;
  background: rgba(8, 10, 16, 0.74);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.topbar.is-scrolled {
  border-color: rgba(223, 255, 79, 0.22);
}

.brand {
  width: min(280px, 52vw);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.nav a {
  position: relative;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--text-soft);
  transition:
    color 180ms ease,
    background-color 180ms ease,
    transform 180ms ease;
}

.nav a:hover,
.nav a[aria-current="true"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.section {
  position: relative;
  padding-block: 42px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 48px;
  align-items: center;
  padding-top: 70px;
  min-height: calc(100vh - 120px);
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 14px;
  font-family: "Tektur", sans-serif;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--signal);
}

h1,
h2,
h3,
.hero-label,
.footer-label,
.stat-card dd {
  font-family: "Tektur", sans-serif;
}

h1 {
  margin: 0;
  font-size: clamp(3.8rem, 10vw, 7.6rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
  text-transform: uppercase;
}

.hero-dek,
.section-heading p,
.story-copy p,
.signal-card p,
.faq-item p,
.footer-copy,
.system-card p,
.hero-note,
.system-list li {
  color: var(--text-soft);
  line-height: 1.7;
}

.hero-dek {
  max-width: 42rem;
  margin: 22px 0 0;
  font-size: clamp(1.08rem, 1.6vw, 1.24rem);
}

.hero-note {
  max-width: 42rem;
  margin: 18px 0 0;
}

.hero-note strong {
  color: var(--signal);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.status-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.status-links a,
.system-list a {
  color: var(--signal-soft);
}

.status-links a {
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  transition:
    transform 180ms ease,
    border-color 180ms ease;
}

.status-links a:hover,
.status-links a:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(138, 243, 207, 0.3);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

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

.button-primary {
  color: #06080c;
  background: linear-gradient(135deg, var(--signal) 0%, #f1ff8f 100%);
  box-shadow: 0 16px 34px rgba(223, 255, 79, 0.2);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 32px 0 0;
}

.stat-card {
  margin: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(10px);
}

.stat-card dt {
  margin: 0 0 8px;
  color: var(--text-soft);
  font-size: 0.88rem;
}

.stat-card dd {
  margin: 0;
  font-size: 1.06rem;
  letter-spacing: 0.02em;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-orbit {
  position: relative;
  width: min(36rem, 84vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, rgba(223, 255, 79, 0.18), transparent 18%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  box-shadow: var(--shadow);
}

.hero-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-ring-outer {
  inset: 4%;
}

.hero-ring-mid {
  inset: 15%;
}

.hero-ring-inner {
  inset: 30%;
}

.hero-core {
  position: absolute;
  inset: 26%;
  display: grid;
  place-items: center;
  border-radius: 28%;
  background:
    linear-gradient(180deg, rgba(10, 12, 18, 0.98), rgba(21, 25, 34, 0.98)),
    #0b0d13;
  border: 1px solid rgba(223, 255, 79, 0.2);
}

.hero-core img {
  width: 60%;
  filter: drop-shadow(0 0 22px rgba(223, 255, 79, 0.18));
}

.hero-sweep {
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  border-top: 2px solid rgba(223, 255, 79, 0.68);
  border-right: 2px solid transparent;
  transform: rotate(28deg);
  animation: sweep 8s linear infinite;
}

.hero-label {
  position: absolute;
  color: rgba(244, 246, 251, 0.56);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.hero-label-top {
  top: 10%;
  right: 12%;
}

.hero-label-bottom {
  bottom: 12%;
  left: 10%;
}

.section-heading {
  display: grid;
  gap: 12px;
  max-width: 48rem;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1;
  text-transform: uppercase;
}

.signal-grid,
.system-grid {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

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

.signal-card,
.story-panel,
.system-card,
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(24, 28, 38, 0.82), rgba(15, 18, 27, 0.74));
  box-shadow: var(--shadow);
}

.signal-card {
  position: relative;
  padding: 22px;
  overflow: hidden;
}

.signal-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -30% auto;
  width: 180px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(223, 255, 79, 0.14), transparent 65%);
}

.signal-index {
  display: inline-flex;
  margin-bottom: 48px;
  font-family: "Instrument Serif", serif;
  font-size: 2.2rem;
  color: rgba(223, 255, 79, 0.84);
}

.signal-card h3,
.system-card h3 {
  margin: 0 0 12px;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
}

.story-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 18px;
  margin-top: 28px;
}

.story-panel {
  padding: 26px;
}

.quote-mark {
  margin: 0 0 14px;
  font-family: "Instrument Serif", serif;
  font-size: 4rem;
  line-height: 1;
  color: var(--signal);
}

.quote-text {
  margin: 0;
  font-family: "Instrument Serif", serif;
  font-size: clamp(1.55rem, 2.6vw, 2.2rem);
  line-height: 1.24;
}

.system-grid {
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
}

.system-card {
  padding: 24px;
}

.system-card-mark {
  display: grid;
  align-content: start;
}

.system-card-mark img {
  width: min(220px, 100%);
  margin-top: 12px;
}

.system-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.palette-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.palette-list li {
  display: flex;
  align-items: center;
  gap: 12px;
}

.palette-list span {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--swatch);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
}

.surface-stack {
  display: grid;
  gap: 12px;
}

.surface-chip {
  padding: 14px 16px;
  border: 1px solid rgba(223, 255, 79, 0.18);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  font-family: "Tektur", sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.faq-item {
  padding: 20px 22px;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-family: "Tektur", sans-serif;
  letter-spacing: 0.04em;
}

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

.faq-item p {
  margin: 14px 0 0;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px 28px;
  padding: 12px 0 38px;
}

.footer-label {
  margin: 0;
  font-size: 0.96rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
}

.footer-copy {
  margin: 0;
  max-width: 40rem;
}

@keyframes sweep {
  from {
    transform: rotate(28deg);
  }

  to {
    transform: rotate(388deg);
  }
}

@media (max-width: 1080px) {
  .hero,
  .story-layout,
  .system-grid,
  .signal-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    order: -1;
  }
}

@media (max-width: 760px) {
  .topbar {
    top: 10px;
    padding: 14px 16px;
  }

  .brand {
    width: min(220px, 62vw);
  }

  h1 {
    font-size: clamp(3.15rem, 18vw, 4.7rem);
  }

  h2 {
    font-size: clamp(1.7rem, 10vw, 2.4rem);
  }

  .hero {
    gap: 28px;
    padding-top: 42px;
  }

  .section {
    padding-block: 28px;
  }

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

  .hero-orbit {
    width: min(27rem, calc(100vw - 56px));
  }
}