:root {
  --sky-top: #3b278a; --sky-mid: #2c1b6b; --sky-bottom: #1a1048;
  --card: rgba(62, 42, 138, 0.92); --card-border: rgba(176, 148, 255, 0.22);
  --text: #ffffff; --muted: #b9a6e8; --accent: #c9b6ff; --glow: #e8d9ff;
}
* { box-sizing: border-box; }
html { background: var(--sky-bottom); }
body {
  margin: 0; color: var(--text); line-height: 1.6;
  font-family: ui-rounded, "SF Pro Rounded", "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, var(--sky-top) 0%, var(--sky-mid) 45%, var(--sky-bottom) 100%) fixed;
  min-height: 100vh;
}
a { color: var(--glow); }
.top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px; max-width: 840px; margin: 0 auto; padding: 18px 20px 8px; }
.brand { color: var(--text); font-weight: 700; font-size: 22px; text-decoration: none; }
nav { display: flex; flex-wrap: wrap; gap: 4px 16px; }
nav a { color: var(--muted); text-decoration: none; font-weight: 500; padding: 4px 0; }
nav a[aria-current="page"], nav a:hover { color: var(--text); }
main { max-width: 840px; margin: 0 auto; padding: 12px 20px 40px; }
h1 { font-size: clamp(30px, 6vw, 42px); line-height: 1.15; margin: 20px 0 8px; }
h2 { font-size: 24px; margin: 36px 0 8px; }
h3 { font-size: 19px; margin: 24px 0 4px; }
p, li { font-size: 17px; }
.lead { font-size: 20px; color: var(--glow); }
.small { font-size: 14px; color: var(--muted); }
.crumb { color: var(--muted); font-size: 14px; margin: 8px 0 0; }
.hero { text-align: center; padding-top: 8px; }
.hero img { max-width: 100%; height: auto; border-radius: 24px; }
.hero h1 { margin-top: 24px; }
.button { display: inline-block; background: var(--accent); color: #2c1b6b; font-weight: 700; padding: 12px 22px; border-radius: 999px; text-decoration: none; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin-top: 14px; }
.card { background: var(--card); border: 1px solid var(--card-border); border-radius: 20px; padding: 18px 20px; }
a.card { text-decoration: none; color: var(--text); display: block; }
a.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 4px; color: var(--glow); }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.note, .callout { background: var(--card); border: 1px solid var(--card-border); border-radius: 20px; padding: 6px 22px 16px; margin-top: 36px; }
.callout { padding: 14px 20px; margin: 8px 0; }
.steps { padding-left: 22px; }
.steps li { margin: 8px 0; }
.lines { list-style: none; padding: 0; display: grid; gap: 10px; }
.lines li { background: var(--card); border: 1px solid var(--card-border); border-radius: 16px; padding: 12px 16px; display: flex; flex-direction: column; }
.lines span { color: var(--muted); font-size: 14px; }
.sources { padding-left: 20px; }
.sources li { font-size: 14px; margin: 8px 0; }
.tutorial { background: var(--card); border: 1px solid var(--card-border); border-radius: 20px; padding: 4px 22px 18px; margin: 18px 0; }
.tutorial h2 { margin-top: 18px; }
footer { max-width: 840px; margin: 0 auto; padding: 8px 20px 40px; color: var(--muted); font-size: 14px; border-top: 1px solid var(--card-border); }