:root {
  color-scheme: light;
  --bg: #0b1220;
  --bg2: #0f1a2f;
  --card: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.14);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --link: #7dd3fc;
  --link-hover: #bae6fd;
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial,
    "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.55;
  background: linear-gradient(180deg, var(--bg), var(--bg2));
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: -40px;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(1200px 600px at 15% 0%, rgba(59, 130, 246, 0.24), transparent 55%),
    radial-gradient(900px 500px at 85% 10%, rgba(16, 185, 129, 0.18), transparent 55%),
    radial-gradient(900px 520px at 50% 110%, rgba(168, 85, 247, 0.12), transparent 60%);
  filter: blur(28px) saturate(120%);
  transform: translateZ(0);
}

a {
  color: var(--link);
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--link-hover);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New",
    monospace;
  font-size: 0.95em;
}

.container {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text);
  transform: translateY(-140%);
  transition: transform 120ms ease;
}

.skip-link:focus {
  transform: translateY(0);
  outline: none;
}

.header {
  padding: 52px 0 26px;
}

.kicker {
  margin: 0 0 10px;
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3rem);
  line-height: 1.12;
}

.subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: baseline;
}

.sep {
  opacity: 0.55;
}

main.container {
  padding: 18px 0 56px;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  margin: 16px 0;
  backdrop-filter: blur(8px);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 1.35rem;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
}

.list {
  margin: 10px 0 0;
  padding-left: 18px;
}

.list li {
  margin: 6px 0;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 12px;
}

@media (min-width: 860px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

.panel {
  border-radius: calc(var(--radius) - 6px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 16px;
  background: rgba(0, 0, 0, 0.12);
}

.note {
  margin: 14px 0 0;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--muted);
}

.footer {
  padding: 18px 0 44px;
  color: var(--muted);
}

.footer p {
  margin: 0;
}