:root {
  color-scheme: dark;
  --bg: #0d1117;
  --panel: #151d27;
  --text: #e8eef5;
  --muted: #9aaabd;
  --line: #293746;
  --accent: #76e4bc;
  --accent-text: #092219;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: radial-gradient(circle at 80% 0, #193c40 0, transparent 35%), var(--bg);
  color: var(--text);
  font:
    16px/1.6 system-ui,
    sans-serif;
}
.top,
main,
footer {
  max-width: 1040px;
  margin: auto;
}
.top {
  display: flex;
  justify-content: space-between;
  padding: 24px 22px;
}
.top a {
  color: var(--muted);
  text-decoration: none;
}
.brand {
  font-weight: 700;
  color: var(--text) !important;
}
.hero {
  padding: 72px 22px 38px;
  max-width: 760px;
}
.eyebrow {
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
  font-weight: 700;
}
.hero h1 {
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: 1.02;
  margin: 14px 0;
}
.lead {
  font-size: 1.2rem;
  color: var(--muted);
}
.notice,
.panel,
.grid article {
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--panel) 90%, transparent);
  border-radius: 18px;
  padding: 18px;
}
.notice {
  font-size: 0.9rem;
  color: #c3d1de;
}
.panel {
  margin: 20px 22px;
  padding: 28px;
  max-width: 700px;
}
.panel-head,
.result-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.panel h2 {
  margin-top: 0;
}
label {
  display: block;
  font-weight: 600;
  margin: 24px 0 8px;
}
select,
button {
  font: inherit;
  border-radius: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: #101720;
  color: var(--text);
}
select {
  width: 100%;
}
button {
  cursor: pointer;
}
button:focus-visible,
a:focus-visible,
select:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}
.primary {
  width: 100%;
  margin-top: 22px;
  background: var(--accent);
  color: var(--accent-text);
  border: 0;
  font-weight: 700;
}
.icon-button {
  border: 0;
  background: transparent;
}
.hint,
.status {
  color: var(--muted);
  font-size: 0.9rem;
}
.status {
  min-height: 25px;
}
.pill {
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 0.75rem;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
pre {
  overflow: auto;
  padding: 16px;
  background: #0a0f14;
  border-radius: 10px;
  font-size: 0.78rem;
}
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  padding: 20px 22px;
}
.grid h2 {
  font-size: 1.1rem;
}
li {
  margin: 8px 0;
}
footer {
  padding: 34px 22px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
}
@media (max-width: 650px) {
  .hero {
    padding-top: 42px;
  }
  .panel {
    margin: 20px 14px;
    padding: 20px;
  }
  .grid {
    grid-template-columns: 1fr;
    padding: 14px;
  }
  .top {
    padding: 18px 14px;
  }
  footer {
    padding: 28px 14px;
    display: block;
  }
  footer span {
    display: block;
    margin-top: 8px;
  }
}