body {
  min-height: 100vh;
  overflow-x: hidden;
}

[hidden] {
  display: none !important;
}

.site-ambient {
  position: fixed;
  z-index: -2;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12% 10%, rgb(108 233 223 / .13), transparent 31rem),
    radial-gradient(circle at 88% 24%, rgb(189 141 240 / .13), transparent 34rem),
    radial-gradient(circle at 50% 100%, rgb(233 184 108 / .08), transparent 32rem),
    linear-gradient(180deg, #060916 0%, var(--bg) 58%);
}

.site-ambient::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: .28;
  background-image:
    linear-gradient(rgb(108 233 223 / .08) 1px, transparent 1px),
    linear-gradient(90deg, rgb(108 233 223 / .08) 1px, transparent 1px);
  background-size: 58px 58px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

.site-ambient::after {
  position: absolute;
  top: 18%;
  left: 50%;
  width: min(72vw, 920px);
  height: min(72vw, 920px);
  border: 1px solid rgb(108 233 223 / .08);
  border-radius: 50%;
  content: "";
  transform: translateX(-50%);
  box-shadow:
    0 0 0 9vw rgb(189 141 240 / .025),
    0 0 0 18vw rgb(108 233 223 / .018);
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: var(--space-3);
  left: var(--space-3);
  padding: .65rem 1rem;
  border-radius: var(--radius-pill);
  color: var(--bg);
  background: var(--cyan);
  transform: translateY(-180%);
  transition: transform .18s ease;
}

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

.site-header {
  position: relative;
  z-index: 10;
  width: min(calc(100% - 2rem), var(--shell-width));
  margin: 0 auto;
  padding-top: var(--space-4);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: .65rem .7rem .65rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgb(3 5 12 / .72);
  box-shadow: var(--shadow-panel);
  backdrop-filter: blur(24px);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .7rem;
  min-height: 44px;
  flex: 0 0 auto;
  text-decoration: none;
}

.site-brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid rgb(108 233 223 / .55);
  border-radius: 50%;
  color: var(--cyan);
  font: 700 .72rem/1 var(--font-mono);
  box-shadow: var(--glow-cyan), inset 0 0 16px rgb(108 233 223 / .08);
}

.site-brand-copy {
  display: grid;
  line-height: 1.08;
}

.site-brand-name {
  font-weight: 700;
  letter-spacing: .12em;
}

.site-brand-subtitle {
  margin-top: .25rem;
  color: var(--muted);
  font: 500 .58rem/1 var(--font-mono);
  letter-spacing: .18em;
}

.site-nav-list {
  display: flex;
  align-items: center;
  gap: .25rem;
  margin: 0 0 0 auto;
  padding: 0;
  list-style: none;
}

.site-nav-link {
  display: grid;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: .72rem 1rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  color: var(--muted);
  font: 600 .7rem/1 var(--font-mono);
  letter-spacing: .1em;
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}

.site-nav-link:hover,
.site-nav-link:focus-visible {
  border-color: var(--line);
  color: var(--text);
  outline: none;
  background: rgb(238 240 246 / .04);
}

.site-nav-link[aria-current="page"] {
  border-color: rgb(108 233 223 / .35);
  color: var(--cyan);
  background: rgb(108 233 223 / .09);
  box-shadow: inset 0 0 18px rgb(108 233 223 / .05), var(--glow-cyan);
}

.site-main {
  width: min(calc(100% - 2rem), var(--shell-width));
  margin: 0 auto;
  padding: clamp(4.5rem, 9vw, 8rem) 0 5rem;
}

.page-hero {
  position: relative;
  display: grid;
  gap: var(--space-4);
  max-width: 900px;
  padding: clamp(1rem, 3vw, 2.5rem) 0 clamp(3rem, 8vw, 6rem);
}

.page-kicker,
.panel-label,
.signal-label {
  color: var(--cyan);
  font: 600 .68rem/1.4 var(--font-mono);
  letter-spacing: .18em;
  text-transform: uppercase;
}

.page-kicker::before,
.panel-label::before {
  content: "// ";
  color: var(--violet);
}

.page-title {
  max-width: 16ch;
  margin: 0;
  font-size: clamp(3rem, 9vw, 7.5rem);
  font-weight: 650;
  letter-spacing: -.065em;
  line-height: .92;
}

.page-title-accent {
  color: transparent;
  background: linear-gradient(100deg, var(--cyan), #c9fff8 43%, var(--violet));
  background-clip: text;
  -webkit-background-clip: text;
}

.page-intro {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.page-intro strong {
  color: var(--text);
  font-weight: 550;
}

.signal-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.signal {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .55rem .8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--muted);
  background: rgb(8 13 24 / .46);
  font: 500 .66rem/1 var(--font-mono);
  letter-spacing: .08em;
}

.signal::before {
  width: .42rem;
  height: .42rem;
  border-radius: 50%;
  content: "";
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}

.library-panel {
  position: relative;
  padding: clamp(1.25rem, 4vw, 2.5rem);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background: var(--panel);
  box-shadow: var(--shadow-panel), var(--glow-violet);
  backdrop-filter: blur(20px);
}

.library-panel::before {
  position: absolute;
  top: 0;
  right: 12%;
  left: 12%;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--cyan), var(--violet), transparent);
  opacity: .55;
}

.panel-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.panel-title {
  margin: .55rem 0 0;
  font-size: clamp(1.5rem, 4vw, 2.35rem);
  line-height: 1.1;
}

.panel-note {
  max-width: 36ch;
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
}

.portal-grid,
.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.portal-card,
.collection-card {
  position: relative;
  min-height: 13rem;
  padding: 1.35rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: linear-gradient(145deg, rgb(238 240 246 / .045), rgb(238 240 246 / .012));
}

.portal-card {
  display: flex;
  min-height: 16rem;
  flex-direction: column;
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.portal-card:hover,
.portal-card:focus-visible {
  border-color: var(--line-strong);
  outline: none;
  box-shadow: var(--glow-cyan);
  transform: translateY(-4px);
}

.portal-index {
  color: var(--muted);
  font: 500 .66rem/1 var(--font-mono);
  letter-spacing: .12em;
}

.portal-title,
.collection-title {
  margin: auto 0 .45rem;
  font-size: 1.25rem;
  line-height: 1.2;
}

.portal-copy,
.collection-copy {
  margin: 0;
  color: var(--muted);
  font-size: .88rem;
}

.portal-arrow {
  position: absolute;
  top: 1.15rem;
  right: 1.15rem;
  color: var(--cyan);
  font-family: var(--font-mono);
}

.collection-card {
  display: grid;
  align-content: end;
}

.collection-card::before {
  position: absolute;
  top: 1.25rem;
  left: 1.25rem;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  content: "";
  box-shadow: inset 0 0 12px rgb(108 233 223 / .12), var(--glow-cyan);
}

.collection-card-wide {
  grid-column: span 2;
}

.shell-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  width: min(calc(100% - 2rem), var(--shell-width));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 500 .65rem/1.5 var(--font-mono);
  letter-spacing: .08em;
}

@media (max-width: 860px) {
  .site-nav {
    align-items: flex-start;
    border-radius: var(--radius-panel);
  }

  .site-nav-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-nav-link {
    text-align: center;
  }

  .portal-grid,
  .collection-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .site-header,
  .site-main,
  .shell-footer {
    width: min(calc(100% - 1.25rem), var(--shell-width));
  }

  .site-nav {
    display: grid;
    gap: var(--space-3);
    padding: .85rem;
  }

  .site-nav-list {
    width: 100%;
    margin: 0;
  }

  .site-nav-link {
    padding-inline: .5rem;
    font-size: .61rem;
  }

  .site-main {
    padding-top: 3.5rem;
  }

  .page-title {
    font-size: clamp(2.9rem, 18vw, 5rem);
  }

  .panel-head,
  .shell-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .portal-grid,
  .collection-grid {
    grid-template-columns: 1fr;
  }

  .collection-card-wide {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
  }
}