:root {
  color-scheme: dark;
  --background: #080808;
  --surface: rgba(255, 255, 255, 0.045);
  --surface-hover: rgba(255, 255, 255, 0.075);
  --text: #f4f2ed;
  --muted: #9b9b93;
  --line: rgba(255, 255, 255, 0.12);
  --accent: #d5ff3f;
  --accent-ink: #101500;
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--background);
  background-size: 48px 48px;
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.5;
}

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

.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(
    720px circle at var(--pointer-x, 72%) var(--pointer-y, 18%),
    rgba(213, 255, 63, 0.11),
    transparent 58%
  );
}

.site-header,
main,
footer {
  width: min(calc(100% - 48px), var(--max-width));
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 88px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.brand span,
.five,
.section-number {
  color: var(--accent);
}

nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 0.9rem;
}

nav a {
  transition: color 160ms ease;
}

nav a:hover,
nav a:focus-visible {
  color: var(--text);
}

.hero {
  min-height: calc(100svh - 88px);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 0 120px;
}

.eyebrow,
.section-number,
.chip,
.card-state,
.card-meta {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.13em;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: var(--muted);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 5px rgba(213, 255, 63, 0.1);
}

h1 {
  display: flex;
  margin: 0;
  font-size: clamp(7rem, 24vw, 17rem);
  font-weight: 900;
  line-height: 0.76;
  letter-spacing: -0.1em;
}

h1 span {
  display: inline-block;
  animation: rise 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

h1 span:nth-child(2) {
  animation-delay: 80ms;
}

h1 span:nth-child(3) {
  animation-delay: 160ms;
}

.nickname {
  margin: 42px 0 8px;
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.intro {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease;
}

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

.button-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
}

.button-ghost:hover,
.button-ghost:focus-visible {
  border-color: rgba(255, 255, 255, 0.35);
  background: var(--surface);
}

.section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 72px;
  padding: 120px 0;
  border-top: 1px solid var(--line);
}

.section-number {
  margin: 0 0 24px;
}

h2 {
  margin: 0;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.about-copy {
  align-self: end;
  max-width: 620px;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
}

.about-copy p {
  margin: 0 0 22px;
}

.muted {
  color: var(--muted);
}

.lab {
  display: block;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 56px;
}

.chip {
  flex: none;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  min-height: 310px;
  display: flex;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  backdrop-filter: blur(12px);
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.24);
  background: var(--surface-hover);
}

.card-featured {
  border-color: rgba(213, 255, 63, 0.36);
  background: linear-gradient(150deg, rgba(213, 255, 63, 0.11), var(--surface));
}

.card-top,
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-icon {
  font-size: 1.45rem;
}

.card-state {
  color: var(--accent);
}

.card-state-soon {
  color: var(--muted);
}

.card h3 {
  margin: auto 0 8px;
  font-size: 1.8rem;
  letter-spacing: -0.04em;
}

.card p {
  min-height: 48px;
  margin: 0 0 30px;
  color: var(--muted);
}

.card-meta {
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  letter-spacing: 0.06em;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 36px 0 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
}

footer p {
  margin: 0;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(48px) rotate(2deg);
  }

  to {
    opacity: 1;
    transform: translateY(0) rotate(0);
  }
}

@media (max-width: 800px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 32px), var(--max-width));
  }

  .hero {
    min-height: 760px;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 88px 0;
  }

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

  .card {
    min-height: 260px;
  }
}

@media (max-width: 480px) {
  nav {
    gap: 18px;
  }

  h1 {
    font-size: 33vw;
  }

  .nickname {
    margin-top: 34px;
  }

  .section-heading,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}