:root {
  color-scheme: dark;
  --bg: #0b0c0d;
  --paper: #fff;
  --muted: #77797c;
  --accent: #f0b428;
  --secondary-yellow: color-mix(in srgb, var(--accent) 55%, #737373);
  --square-bg: #141517;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  position: relative;
  margin: 0;
  background: var(--bg);
  color: var(--paper);
  font-family: "Bahnschrift", "Arial", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
.hero { height: calc(132svh + 60px); }
.hero-content { position: sticky; top: 0; height: 100svh; padding-top: 8svh; text-align: center; }
h1 { margin: 0; line-height: 0; }
.wordmark { display: block; width: min(70vw, 100svh, 980px); height: auto; margin: 0 auto; }
#scrollLetter { fill: color-mix(in srgb, var(--accent) calc(var(--scroll-progress, 0) * 100%), #fff); }
.tagline { margin: 26px 0 0; font-size: clamp(17px, 1.8vw, 25px); font-weight: 400; letter-spacing: 4px; }
.card-stage {
  --row-width: min(90vw, 900px);
  --card-gap: clamp(3px, .7vw, 8px);
  --card-width: calc((var(--row-width) - var(--card-gap) * 24) / 25);
  --card-height: var(--card-width);
  --card-step: calc(var(--card-width) + var(--card-gap));
  position: absolute;
  top: 50svh;
  left: 50%;
  width: var(--row-width);
  height: calc(var(--card-height) * 2 + 66px);
  transform: translateX(-50%);
  overflow: hidden;
}
.target-line { position: absolute; top: calc(var(--card-height) + 28px); inset-inline: 0; height: 1px; background: var(--accent); }
.sort-card {
  position: absolute;
  top: calc(var(--card-height) + 50px);
  left: calc(50% - var(--card-width) / 2);
  width: var(--card-width);
  height: var(--card-height);
  border: 1px solid #1a1b1d;
  background: var(--square-bg);
  transform: translateX(calc(var(--slot) * var(--card-step)));
}
.lift-card { z-index: 1; transform: translateY(calc(-1 * (var(--card-height) + 38px) * var(--scroll-progress, 0))); }
.follow-card { transform: translateX(calc((var(--slot) - var(--follow-progress, 0)) * var(--card-step))); }
.hero-content.is-above-line .lift-card {
  background: var(--secondary-yellow);
  border-color: var(--secondary-yellow);
}
.release {
  position: absolute;
  top: 86svh;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-inline: 24px;
  opacity: var(--scroll-progress, 0);
  visibility: hidden;
  transform: translateY(calc(12px * (1 - var(--scroll-progress, 0))));
}
.hero-content.has-scroll .release { visibility: visible; }
.download-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 56px;
  min-width: 246px;
  padding: 19px 22px;
  border: 1px solid #6b6d70;
  background: transparent;
  font-size: 14px;
  transition: border-color .15s, background .15s, color .15s;
}
.download-button span { font: 23px Arial, sans-serif; line-height: 1; }
.download-button:hover { border-color: var(--paper); background: var(--paper); color: var(--bg); }
.download-button[aria-disabled="true"] { opacity: .4; }
#releaseMeta { margin: 15px 0 0; font: 10px monospace; letter-spacing: .4px; color: var(--muted); }
footer { position: absolute; bottom: 0; inset-inline: 0; display: flex; justify-content: space-between; gap: 24px; padding: 22px 40px; color: var(--muted); font-size: 10px; }
footer button { padding: 0; border: 0; background: none; color: inherit; font-size: 10px; }
footer button:hover { color: var(--paper); }
dialog { position: fixed; width: min(660px, calc(100% - 40px)); max-height: 90svh; padding: 44px 32px 30px; border: 1px solid #393a3c; background: #101112; color: var(--paper); }
dialog::backdrop { background: #000d; }
.close-dialog { position: absolute; right: 14px; top: 10px; border: 0; background: none; padding: 4px 8px; color: var(--muted); font-size: 12px; }
.close-dialog:hover { color: var(--paper); }
dialog h2 { margin: 0 0 22px; font-size: 23px; font-weight: 500; }
#privacyText { white-space: pre-wrap; color: #b8b8b8; font-size: 13px; line-height: 1.9; }
body:has(dialog[open]) { overflow: hidden; }
@media (max-width: 540px) {
  .hero-content { padding-top: 18svh; }
  .wordmark { width: 88vw; }
  .tagline { margin-top: 25px; font-size: 16px; letter-spacing: 2px; }
  footer { padding: 20px 22px; }
  dialog { padding-inline: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .download-button, .lift-card, .follow-card, #scrollLetter, .release { transition: none; }
}