:root {
  color-scheme: dark;
  --bg: #07130f;
  --panel: rgba(255, 255, 255, 0.075);
  --panel-strong: rgba(255, 255, 255, 0.12);
  --text: #f5fbf7;
  --muted: #b7c7bd;
  --line: rgba(255, 255, 255, 0.16);
  --accent: #8fdc9a;
  --accent-strong: #d9f99d;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  line-height: 1.55;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 18% 0%, rgba(143, 220, 154, 0.18), transparent 32rem),
    linear-gradient(180deg, #07130f 0%, #0d1614 52%, #07130f 100%);
}

a {
  color: var(--accent-strong);
}

.page {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

.masthead {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0 34px;
}

.app-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  box-shadow: 0 16px 42px rgba(0, 0, 0, 0.35);
}

.brand {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0;
}

.tagline {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}

main {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(20px);
}

h1 {
  margin: 0 0 6px;
  font-size: clamp(32px, 6vw, 56px);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin: 32px 0 10px;
  font-size: 22px;
  letter-spacing: 0;
}

h3 {
  margin: 22px 0 8px;
  font-size: 17px;
  letter-spacing: 0;
}

p {
  margin: 0 0 14px;
}

ul, ol {
  margin: 0 0 18px;
  padding-left: 24px;
}

li + li {
  margin-top: 6px;
}

.meta {
  color: var(--muted);
  font-size: 14px;
}

.callout {
  margin: 22px 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
}

.footer {
  margin-top: 26px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 640px) {
  .page {
    width: min(100% - 24px, 880px);
    padding-top: 24px;
  }

  main {
    padding: 22px;
  }

  .app-icon {
    width: 52px;
    height: 52px;
    border-radius: 13px;
  }
}