:root { color: #172033; background: #f7fbff; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; line-height: 1.65; }
a { color: #0f5fce; }
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 18px max(24px, calc((100% - 1080px) / 2)); border-bottom: 1px solid #dce7f4; background: #fff; }
.brand { color: #172033; font-weight: 800; font-size: 19px; text-decoration: none; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; }
.site-header nav a { text-decoration: none; }
.hero { padding: 64px max(24px, calc((100% - 900px) / 2)) 40px; background: linear-gradient(135deg, #eef7ff, #fff); }
.eyebrow { margin: 0 0 8px; color: #0f5fce; font-size: 14px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
h1 { max-width: 820px; margin: 0; font-size: clamp(34px, 5vw, 52px); line-height: 1.12; }
.lede { max-width: 760px; margin: 18px 0 0; color: #475569; font-size: 19px; }
main { width: min(100% - 48px, 900px); margin: 44px auto 70px; }
h2 { margin-top: 42px; font-size: 27px; line-height: 1.25; }
h3 { margin-top: 24px; font-size: 20px; }
.callout { margin: 28px 0; padding: 22px; border: 1px solid #bfd9f8; border-radius: 10px; background: #f0f7ff; }
.button { display: inline-block; margin-top: 8px; padding: 11px 16px; border-radius: 7px; background: #1266d6; color: #fff; font-weight: 750; text-decoration: none; }
.related { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 20px; }
.related a { display: block; padding: 16px; border: 1px solid #d7e4f1; border-radius: 8px; background: #fff; font-weight: 700; text-decoration: none; }
.tutorial-figure { margin: 30px 0; overflow: hidden; border: 1px solid #d7e4f1; border-radius: 10px; background: #fff; box-shadow: 0 10px 24px rgba(23, 32, 51, .08); }
.tutorial-figure img { display: block; width: 100%; height: auto; }
.tutorial-figure figcaption { padding: 14px 18px; color: #475569; font-size: 14px; }
.example-data { margin: 24px 0; padding: 20px; border-left: 4px solid #1266d6; background: #f0f7ff; }
.example-data p { margin: 0 0 12px; }
.example-data p:last-child { margin-bottom: 0; }
footer { padding: 30px 24px; border-top: 1px solid #dce7f4; text-align: center; color: #64748b; }
@media (max-width: 700px) { .site-header { align-items: flex-start; flex-direction: column; } .hero { padding-top: 42px; } .related { grid-template-columns: 1fr; } }