Squiggleverse/src/app.css

:root {
  color-scheme: dark;
  --color-bg-deep: #070014;
  --color-bg-space: #160030;
  --color-purple-dark: #2a0f56;
  --color-purple: #6b3fb3;
  --color-purple-light: #b58cff;
  --color-lavender: #f1e7ff;
  --color-white: #ffffff;
  --color-cyan-accent: #43d8ff;
  --font-copy: Nunito, Lexend, ui-sans-serif, system-ui, sans-serif;
  --glow-purple: 0 0 32px rgba(159, 95, 255, 0.45);
  --border-purple: rgba(190, 143, 255, 0.42);
  font-family:
    Atkinson Hyperlegible,
    Lexend,
    Nunito Sans,
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    Segoe UI,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--color-bg-deep);
  color: var(--color-white);
  text-rendering: optimizeLegibility;
}

img,
video {
  max-width: 100%;
}

a {
  color: inherit;
}

.landing-page {
  min-height: 100svh;
  position: relative;
  isolation: isolate;
  overflow: clip;
  background: var(--color-bg-deep);
}

.space-backdrop,
.space-backdrop::before,
.space-backdrop::after,
.star-layer {
  pointer-events: none;
  inset: 0;
  z-index: -1;
}

.space-backdrop {
  position: fixed;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% -8%, rgba(209, 183, 255, 0.1), transparent 23rem),
    radial-gradient(ellipse at 18% 48%, rgba(112, 14, 181, 0.13), transparent 35rem),
    radial-gradient(ellipse at 84% 50%, rgba(88, 8, 156, 0.12), transparent 34rem),
    radial-gradient(ellipse at 50% 88%, rgba(111, 0, 185, 0.18), transparent 42rem),
    linear-gradient(180deg, #020007 0%, #03000a 30%, #060011 58%, #0d001d 82%, #020007 100%);
}

.space-backdrop::before {
  content: '';
  position: absolute;
  inset: -16svh -8vw;
  background:
    radial-gradient(ellipse at 12% 32%, rgba(111, 42, 173, 0.08), transparent 28rem),
    radial-gradient(ellipse at 88% 28%, rgba(102, 54, 176, 0.07), transparent 24rem),
    radial-gradient(ellipse at 50% 83%, rgba(113, 0, 178, 0.12), transparent 35rem);
  filter: blur(18px);
  transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.14), 0);
  will-change: transform;
}

.space-backdrop::after {
  content: '';
  position: absolute;
  opacity: 0.2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 13rem 13rem;
  mask-image: linear-gradient(to bottom, transparent, black 15%, black 86%, transparent);
}

.star-layer {
  position: absolute;
  inset: -18svh -10vw;
  background-repeat: repeat;
  transform-origin: center top;
  will-change: transform;
}

.star-layer-dust {
  opacity: 0.72;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.74) 0 0.8px, transparent 1.4px),
    radial-gradient(circle, rgba(223, 207, 255, 0.62) 0 0.7px, transparent 1.3px),
    radial-gradient(circle, rgba(255, 255, 255, 0.5) 0 0.6px, transparent 1.2px);
  background-position:
    1rem 2rem,
    6rem 8rem,
    11rem 4rem;
  background-size:
    9rem 11rem,
    13rem 17rem,
    19rem 23rem;
  transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.16), 0);
}

.star-layer-far {
  opacity: 0.78;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.86) 0 1px, transparent 1.8px),
    radial-gradient(circle, rgba(222, 204, 255, 0.72) 0 1px, transparent 1.7px),
    radial-gradient(circle, rgba(255, 255, 255, 0.55) 0 0.8px, transparent 1.5px);
  background-position:
    2rem 4rem,
    8rem 13rem,
    16rem 7rem;
  background-size:
    17rem 19rem,
    23rem 29rem,
    31rem 37rem;
  transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.24), 0);
}

.star-layer-near {
  opacity: 0.9;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.98) 0 1.4px, rgba(202, 181, 255, 0.48) 2.2px, transparent 8px),
    radial-gradient(circle, rgba(255, 255, 255, 0.9) 0 1px, rgba(180, 132, 255, 0.36) 2px, transparent 6px),
    radial-gradient(circle, rgba(255, 255, 255, 0.78) 0 1px, transparent 2px);
  background-position:
    4rem 6rem,
    14rem 18rem,
    24rem 10rem;
  background-size:
    24rem 31rem,
    36rem 42rem,
    19rem 23rem;
  transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.48), 0);
}

.hero {
  width: min(1120px, 100%);
  min-height: 100svh;
  margin-inline: auto;
  padding: clamp(1.25rem, 4vw, 2.75rem) clamp(1rem, 3vw, 2rem) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.site-footer {
  position: relative;
  width: min(1120px, 100%);
  margin: clamp(5rem, 8vw, 7.5rem) auto 0;
  padding: 0 clamp(1rem, 3vw, 2rem) clamp(1.4rem, 3vw, 2rem);
  text-align: center;
}

.site-footer p {
  margin: 0;
  color: rgba(241, 231, 255, 0.74);
  font-family: var(--font-copy);
  font-size: clamp(0.85rem, 1.3vw, 1rem);
  font-weight: 500;
  letter-spacing: 0;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.42);
}

.hero-logo {
  display: flex;
  justify-content: center;
  width: 100%;
}

.hero-logo img {
  width: min(720px, 88vw);
  height: auto;
  filter: drop-shadow(0 0 28px rgba(159, 95, 255, 0.45));
}

.video-card {
  width: min(940px, 92vw);
  margin: clamp(0.9rem, 2.4vw, 1.65rem) auto 0;
  padding: clamp(0.45rem, 1vw, 0.75rem);
  border: 1px solid var(--border-purple);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(28, 10, 72, 0.78), rgba(12, 4, 38, 0.84));
  box-shadow:
    var(--glow-purple),
    inset 0 0 38px rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
}

.video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 16px;
  background: #090019;
}

.intro {
  width: min(900px, 88vw);
  margin: clamp(5.5rem, 8vw, 7.5rem) auto 0;
  text-align: center;
}

.intro p {
  max-width: 37ch;
  margin: 0 auto;
  color: var(--color-lavender);
  font-family: var(--font-copy);
  font-size: clamp(1.2rem, 2.2vw, 2rem);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: 0;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.5);
  text-wrap: pretty;
}

.star-divider {
  width: min(24rem, 72vw);
  margin: clamp(4.75rem, 7vw, 6.5rem) auto 0;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1.1rem;
  color: var(--color-purple-light);
}

.star-divider span {
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(181, 140, 255, 0.9), transparent);
  filter: drop-shadow(0 0 8px rgba(181, 140, 255, 0.7));
}

.star-divider strong {
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  line-height: 1;
  font-weight: 900;
  text-shadow:
    0 0 12px rgba(181, 140, 255, 0.9),
    0 0 28px rgba(159, 95, 255, 0.58);
}

.star-divider span:first-child {
  background: linear-gradient(90deg, transparent, rgba(181, 140, 255, 0.9));
}

.star-divider span:last-child {
  background: linear-gradient(90deg, rgba(181, 140, 255, 0.9), transparent);
}

:focus-visible {
  outline: 3px solid var(--color-cyan-accent);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.error-page {
  min-height: 100svh;
  display: grid;
  place-content: center;
  gap: 1rem;
  padding: 2rem;
  text-align: center;
  background: var(--color-bg-space);
}

.error-page h1,
.error-page p {
  margin: 0;
}

@media (max-width: 768px) {
  .space-backdrop {
    background:
      radial-gradient(circle at 50% -4%, rgba(170, 132, 232, 0.1), transparent 17rem),
      radial-gradient(ellipse at 6% 42%, rgba(76, 10, 130, 0.11), transparent 18rem),
      radial-gradient(ellipse at 94% 48%, rgba(56, 5, 107, 0.1), transparent 19rem),
      radial-gradient(ellipse at 50% 86%, rgba(89, 0, 151, 0.16), transparent 27rem),
      linear-gradient(180deg, #020007 0%, #03000a 30%, #060011 58%, #0d001d 82%, #020007 100%);
  }

  .space-backdrop::before {
    background:
      radial-gradient(ellipse at 8% 32%, rgba(95, 35, 154, 0.08), transparent 18rem),
      radial-gradient(ellipse at 92% 34%, rgba(82, 38, 145, 0.07), transparent 17rem),
      radial-gradient(ellipse at 52% 86%, rgba(102, 0, 176, 0.12), transparent 25rem);
    transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.12), 0);
  }

  .star-layer {
    inset: -16svh -20vw;
  }

  .star-layer-far {
    transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.2), 0);
  }

  .star-layer-dust {
    opacity: 0.68;
    transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.12), 0);
  }

  .star-layer-near {
    transform: translate3d(0, calc(var(--parallax-y, 0px) * -0.38), 0);
  }

  .hero {
    padding-top: 1rem;
  }

  .hero-logo img {
    width: min(86vw, 520px);
  }

  .video-card {
    width: 92vw;
    border-radius: 18px;
  }

  .video-card video {
    border-radius: 12px;
  }

  .intro {
    width: min(34rem, 88vw);
    margin-top: clamp(4.25rem, 14vw, 5.5rem);
  }

  .intro p {
    font-size: clamp(1.12rem, 5vw, 1.5rem);
  }

  .star-divider {
    margin-top: clamp(4rem, 13vw, 5.25rem);
  }

  .site-footer {
    margin-top: clamp(4.5rem, 15vw, 6rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .space-backdrop::before,
  .star-layer-dust,
  .star-layer-far,
  .star-layer-near {
    transform: none;
    will-change: auto;
  }
}