:root {
  color-scheme: light dark;
  --bg: #f5f6f2;
  --bg-deep: #eef1eb;
  --text: #101512;
  --muted: #687169;
  --accent: #1f883d;
  --code: #2a332d;
  --grid: rgba(16, 21, 18, 0.02);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070a08;
    --bg-deep: #0b100d;
    --text: #e6eee8;
    --muted: #89948c;
    --accent: #3fb950;
    --code: #b9c5bc;
    --grid: rgba(230, 238, 232, 0.03);
  }
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-gutter: stable;
}

::selection {
  background: rgba(63, 185, 80, 0.2);
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 24px 18px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 0%, rgba(63, 185, 80, 0.035), transparent 34%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  color: var(--text);
  font: 15px/1.6 ui-monospace, SFMono-Regular, Menlo, Monaco, "Cascadia Mono", monospace;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.94) 28%, rgba(0, 0, 0, 0.72) 68%, transparent 100%);
  pointer-events: none;
}

body::after {
  content: "";
  position: fixed;
  inset: -20%;
  background:
    radial-gradient(circle at 18% 22%, rgba(63, 185, 80, 0.035), transparent 24%),
    radial-gradient(circle at 78% 18%, rgba(46, 160, 67, 0.024), transparent 22%),
    radial-gradient(circle at 56% 78%, rgba(88, 166, 255, 0.02), transparent 26%);
  filter: blur(40px);
  animation: drift 34s ease-in-out infinite alternate;
  pointer-events: none;
}

.repo-link,
.shell {
  position: relative;
  z-index: 1;
}

.repo-link {
  position: fixed;
  top: 18px;
  right: 18px;
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.shell {
  width: min(860px, 100%);
  display: grid;
  min-height: calc(100vh - 48px);
  margin: 0 auto;
  align-content: center;
  gap: 22px;
  justify-items: center;
}

.toolbar,
.embed {
  width: min(100%, 780px);
  display: grid;
  gap: 10px;
  align-items: center;
}

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

.username {
  min-width: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px;
  align-items: center;
}

.prefix,
.copy-button {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

input {
  width: 100%;
  min-width: 0;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--text);
  outline: 0;
  font: inherit;
}

input::placeholder {
  color: var(--muted);
}

.preview {
  width: min(100%, 1000px);
  display: block;
}

.embed {
  grid-template-columns: 1fr auto;
}

.embed-code {
  color: var(--code);
  font-size: 13px;
}

.copy-button {
  border: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.shell-404 {
  gap: 6px;
}

.status,
.title,
.home-link {
  margin: 0;
}

.status,
.home-link {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.title {
  font: inherit;
  font-size: 24px;
}

.home-link {
  text-decoration: none;
}

@keyframes drift {
  0% {
    transform: translate3d(-2%, -1%, 0) scale(1);
  }

  50% {
    transform: translate3d(2%, 1%, 0) scale(1.04);
  }

  100% {
    transform: translate3d(-1%, 2%, 0) scale(1.01);
  }
}

@media (max-width: 720px) {
  body {
    padding: 18px 12px;
  }

  .repo-link {
    top: 12px;
    right: 12px;
  }

  .shell {
    min-height: calc(100vh - 36px);
    gap: 18px;
  }

  .username,
  .embed {
    gap: 8px;
  }

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

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

  .copy-button {
    justify-self: start;
  }
}