:root {
  color-scheme: light;
  --paper: #f8f9fa;
  --ink: #0b0d10;
  --edge: rgba(255, 255, 255, 0.76);
  --spectral-blue: rgba(81, 165, 255, 0.26);
  --spectral-amber: rgba(255, 151, 84, 0.2);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  background: var(--paper);
  color: var(--ink);
}

body[data-option="b"] {
  color-scheme: dark;
  --paper: #020305;
  --ink: #eef4f8;
  --edge: rgba(219, 235, 247, 0.32);
  --spectral-blue: rgba(71, 165, 255, 0.4);
  --spectral-amber: rgba(255, 143, 73, 0.26);
  background: #020305;
}

body[data-option="c"] {
  --paper: #fbfcfd;
  --ink: #111419;
  --edge: rgba(255, 255, 255, 0.86);
  --spectral-blue: rgba(96, 174, 255, 0.2);
  --spectral-amber: rgba(255, 159, 95, 0.16);
}

body[data-option="a"],
body[data-option="ad"] {
  --paper: #fbfcfd;
  --ink: #101318;
  --edge: rgba(194, 204, 214, 0.36);
  --spectral-blue: rgba(120, 160, 205, 0.1);
  --spectral-amber: rgba(210, 165, 120, 0.08);
}

body[data-option="d"],
body[data-option="ad"][data-beat="dark"] {
  color-scheme: dark;
  --paper: #010101;
  --ink: #edf0f2;
  --edge: rgba(238, 240, 242, 0.18);
  --spectral-blue: rgba(230, 235, 240, 0.14);
  --spectral-amber: rgba(230, 235, 240, 0.1);
  background: #010101;
}

.landing {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 0.98), rgba(248, 249, 250, 0.84) 38%, rgba(239, 243, 247, 0.7) 100%),
    linear-gradient(180deg, #ffffff, #f4f6f8);
}

body[data-option="b"] .landing {
  background:
    radial-gradient(circle at 50% 48%, rgba(26, 34, 42, 0.62), rgba(4, 6, 9, 0.86) 34%, rgba(0, 0, 0, 1) 100%),
    linear-gradient(180deg, #05080c, #000000);
}

body[data-option="c"] .landing {
  background:
    radial-gradient(circle at 50% 45%, rgba(255, 255, 255, 1), rgba(248, 251, 253, 0.92) 45%, rgba(241, 245, 248, 0.78) 100%),
    linear-gradient(180deg, #ffffff, #f7f9fb);
}

body[data-option="a"] .landing,
body[data-option="ad"] .landing {
  background:
    radial-gradient(circle at 50% 47%, rgba(255, 255, 255, 1), rgba(249, 251, 253, 0.96) 46%, rgba(243, 246, 249, 0.8) 100%),
    linear-gradient(180deg, #ffffff, #f8fafc);
}

body[data-option="d"] .landing,
body[data-option="ad"][data-beat="dark"] .landing {
  background:
    radial-gradient(circle at 50% 50%, rgba(32, 34, 37, 0.68), rgba(8, 8, 9, 0.92) 42%, #000000 100%),
    linear-gradient(180deg, #050505, #000000);
}

body[data-option="ad"],
body[data-option="ad"] .landing,
body[data-option="ad"] .glass,
body[data-option="ad"] h1,
body[data-option="ad"] h1::before {
  transition:
    background 160ms linear,
    color 160ms linear,
    opacity 160ms linear,
    text-shadow 160ms linear,
    -webkit-text-stroke-color 160ms linear;
}

.field,
.glass {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

body[data-option="b"] .glass {
  background:
    radial-gradient(ellipse 60% 18% at 50% 41%, rgba(255, 255, 255, 0.09) 0 24%, rgba(0, 0, 0, 0.18) 52%, transparent 76%),
    radial-gradient(ellipse 66% 18% at 50% 60%, rgba(0, 0, 0, 0.46) 0 32%, rgba(255, 255, 255, 0.08) 58%, transparent 78%),
    linear-gradient(92deg, transparent 0 14%, var(--spectral-blue) 29%, rgba(255, 255, 255, 0.24) 50%, var(--spectral-amber) 71%, transparent 88%);
  mix-blend-mode: screen;
  opacity: 0.68;
}

body[data-option="c"] .glass {
  background:
    radial-gradient(ellipse 48% 13% at 50% 42%, rgba(255, 255, 255, 0.44) 0 39%, rgba(255, 255, 255, 0.88) 53%, transparent 70%),
    radial-gradient(ellipse 56% 15% at 50% 58%, rgba(36, 42, 48, 0.08) 0 22%, rgba(255, 255, 255, 0.82) 48%, transparent 72%),
    linear-gradient(92deg, transparent 0 17%, var(--spectral-blue) 30%, rgba(255, 255, 255, 0.64) 48%, var(--spectral-amber) 68%, transparent 84%);
  opacity: 0.92;
}

body[data-option="a"] .glass,
body[data-option="ad"] .glass {
  background:
    radial-gradient(ellipse 34% 18% at 50% 50%, transparent 0 49%, rgba(140, 150, 160, 0.2) 51%, rgba(255, 255, 255, 0.48) 55%, transparent 68%),
    radial-gradient(ellipse 64% 24% at 50% 50%, rgba(60, 70, 80, 0.06), transparent 66%);
  filter: blur(0.12px) saturate(1.04);
  mix-blend-mode: multiply;
  opacity: 0.72;
}

body[data-option="d"] .glass,
body[data-option="ad"][data-beat="dark"] .glass {
  background:
    linear-gradient(90deg, transparent 0 18%, rgba(255, 255, 255, 0.05) 50%, transparent 82%),
    radial-gradient(ellipse 54% 18% at 50% 50%, rgba(255, 255, 255, 0.04), transparent 70%);
  filter: blur(0.1px);
  mix-blend-mode: screen;
  opacity: 0.72;
}

.field {
  z-index: -3;
  opacity: 1;
}

.glass {
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(ellipse 48% 13% at 50% 42%, rgba(255, 255, 255, 0.12) 0 39%, rgba(255, 255, 255, 0.74) 53%, transparent 70%),
    radial-gradient(ellipse 56% 15% at 50% 58%, rgba(0, 0, 0, 0.24) 0 22%, rgba(255, 255, 255, 0.76) 48%, transparent 72%),
    linear-gradient(92deg, transparent 0 17%, var(--spectral-blue) 30%, rgba(255, 255, 255, 0.52) 48%, var(--spectral-amber) 68%, transparent 84%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), transparent 30%, transparent 70%, rgba(255, 255, 255, 0.72));
  filter: blur(0.2px) saturate(1.24);
  mix-blend-mode: screen;
  opacity: 0.88;
}

.glass::before,
.glass::after {
  content: "";
  position: absolute;
  left: 50%;
  width: min(1180px, 94vw);
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(76, 126, 180, 0.34), var(--edge), rgba(229, 128, 67, 0.3), transparent);
  box-shadow:
    0 0 22px rgba(255, 255, 255, 0.78),
    0 0 44px rgba(79, 157, 255, 0.16);
}

.glass::before {
  top: calc(50% - 74px);
}

.glass::after {
  top: calc(50% + 76px);
}

h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: calc(100vw - 40px);
  color: rgba(7, 8, 11, 0.9);
  font-size: 112px;
  font-weight: 430;
  line-height: 1;
  letter-spacing: 0;
  text-align: center;
  text-rendering: geometricPrecision;
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.78),
    0 18px 58px rgba(7, 8, 11, 0.1);
  transform: translateY(5px);
}

body[data-option="b"] h1 {
  color: rgba(238, 244, 248, 0.9);
  font-weight: 380;
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.18),
    0 0 38px rgba(164, 206, 255, 0.18),
    0 28px 80px rgba(0, 0, 0, 0.42);
}

body[data-option="c"] h1 {
  color: rgba(17, 20, 25, 0.82);
  font-weight: 390;
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.86),
    0 18px 52px rgba(7, 8, 11, 0.08);
}

body[data-option="a"] h1,
body[data-option="ad"] h1 {
  color: rgba(16, 19, 24, 0.78);
  font-weight: 360;
  text-shadow:
    0 1px 0 rgba(255, 255, 255, 0.92),
    0 22px 72px rgba(20, 24, 28, 0.08);
}

body[data-option="d"] h1,
body[data-option="ad"][data-beat="dark"] h1 {
  color: rgba(240, 242, 244, 0.94);
  font-weight: 330;
  text-shadow:
    0 0 18px rgba(235, 238, 242, 0.26),
    0 0 68px rgba(235, 238, 242, 0.12);
}

h1::before {
  content: "zillioneyre";
  position: absolute;
  inset: 0;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.54);
  filter: blur(1px);
  transform: translate3d(1px, -1px, 0);
  z-index: -1;
}

body[data-option="b"] h1::before {
  -webkit-text-stroke: 1px rgba(111, 178, 255, 0.3);
  filter: blur(1.6px);
}

body[data-option="c"] h1::before {
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.68);
  filter: blur(1.1px);
}

body[data-option="a"] h1::before,
body[data-option="ad"] h1::before {
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.74);
  filter: blur(1.5px);
}

body[data-option="d"] h1::before,
body[data-option="ad"][data-beat="dark"] h1::before {
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.24);
  filter: blur(2px);
}

@media (min-width: 1100px) {
  h1 {
    font-size: 136px;
  }
}

@media (max-width: 720px) {
  h1 {
    font-size: 62px;
  }

  .glass::before {
    top: calc(50% - 46px);
  }

  .glass::after {
    top: calc(50% + 48px);
  }
}

@media (max-width: 390px) {
  h1 {
    font-size: 50px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .field {
    opacity: 0.72;
  }
}