:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #5e6878;
  --line: #d9e0ea;
  --green: #0f7b63;
  --blue: #2457d6;
  --amber: #b45f06;
  --shadow: 0 18px 48px rgba(23, 32, 51, 0.08);
}
* { box-sizing: border-box; }
html { background: var(--bg); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.5; }
body { margin: 0; min-width: 320px; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, 0.94); backdrop-filter: blur(14px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; max-width: 1180px; min-height: 64px; margin: 0 auto; padding: 0 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 780; }
.brand-mark { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 8px; background: #172033; color: #fff; font-size: 12px; letter-spacing: 0; }
.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; font-size: 14px; }
.nav a { color: var(--muted); }
.main { max-width: 1180px; margin: 0 auto; padding: 36px 22px 58px; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 28px; align-items: end; margin-bottom: 22px; }
.eyebrow { margin: 0 0 10px; color: var(--green); font-size: 13px; font-weight: 760; text-transform: uppercase; }
h1, h2, h3 { margin: 0; letter-spacing: 0; }
h1 { max-width: 820px; font-size: 44px; line-height: 1.06; }
h2 { font-size: 23px; line-height: 1.18; }
.lede { max-width: 790px; margin: 14px 0 0; color: var(--muted); font-size: 17px; }
.hero-aside { display: grid; grid-template-columns: 1fr; gap: 10px; }
.metric { display: grid; grid-template-columns: 72px 1fr; align-items: center; gap: 14px; padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.metric span { font-size: 30px; font-weight: 780; }
.metric small { color: var(--muted); font-size: 13px; }
.tool-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr); gap: 18px; align-items: stretch; margin: 22px 0; }
.panel { border: 1px solid var(--line); border-radius: 8px; background: var(--surface); box-shadow: var(--shadow); }
.panel-header { padding: 18px 20px; border-bottom: 1px solid var(--line); }
.panel-header p { margin: 6px 0 0; color: var(--muted); font-size: 14px; }
.form-body { display: grid; gap: 14px; padding: 20px; }
label { display: grid; gap: 6px; color: #344154; font-size: 13px; font-weight: 650; }
input, textarea { width: 100%; min-height: 42px; padding: 9px 10px; border: 1px solid #c9d3e0; border-radius: 6px; background: #fff; color: var(--ink); font: inherit; }
textarea { min-height: 92px; resize: vertical; }
fieldset { display: grid; gap: 8px; margin: 0; padding: 12px; border: 1px solid var(--line); border-radius: 8px; }
fieldset label { display: flex; align-items: center; gap: 8px; font-weight: 520; }
fieldset input { width: auto; min-height: auto; }
button, .button-link { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 9px 14px; border-radius: 7px; border: 1px solid transparent; font: inherit; font-weight: 720; cursor: pointer; }
.primary { background: var(--green); color: #fff; }
.secondary, .button-link { border-color: #c8d2df; background: #fff; color: var(--ink); }
.output-panel { display: grid; grid-template-rows: auto 1fr auto; min-height: 100%; }
.tabs { display: flex; gap: 8px; padding: 12px; border-bottom: 1px solid var(--line); }
.tab { min-height: 34px; background: #eef3f1; color: var(--muted); }
.tab.is-active { background: var(--ink); color: #fff; }
.output { display: none; min-height: 390px; margin: 0; padding: 18px; overflow: auto; color: #e9edf5; background: #111827; font-size: 13px; white-space: pre-wrap; }
.output.is-active { display: block; }
.output-panel .secondary { margin: 12px; }
.band { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 22px; margin: 26px 0; padding: 24px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.band p { margin: 10px 0 0; color: var(--muted); }
.decision-list { display: grid; gap: 10px; }
.decision-list article { display: grid; gap: 4px; padding: 14px; border: 1px solid var(--line); border-radius: 8px; background: #fbfcfe; }
.decision-list span { color: var(--muted); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
th { color: #344154; background: #f2f5f8; font-size: 12px; text-transform: uppercase; }
code { padding: 2px 5px; border-radius: 5px; background: #eef3f1; color: #155c4a; }
.sources { margin-top: 28px; }
.sources ul, .side-panel ul { display: grid; gap: 10px; padding: 0; list-style: none; }
.sources li, .side-panel li { display: grid; gap: 2px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.sources span, .side-panel span { color: var(--muted); font-size: 13px; }
.article-head { margin-bottom: 22px; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 18px; align-items: start; }
.article, .side-panel, .example-stack article { padding: 22px; border: 1px solid var(--line); border-radius: 8px; background: #fff; box-shadow: var(--shadow); }
.article { display: grid; gap: 16px; }
.article p, .article li, .side-panel p { color: var(--muted); }
.article ul { margin: 0; padding-left: 20px; }
.code-block { margin: 0; padding: 16px; overflow-x: auto; border-radius: 8px; background: #111827; color: #e9edf5; font-size: 13px; white-space: pre-wrap; }
.link-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.link-grid a { padding: 10px; border: 1px solid var(--line); border-radius: 7px; background: #f8fafc; }
.example-stack { display: grid; gap: 16px; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; max-width: 1180px; margin: 0 auto; padding: 24px 22px 40px; color: var(--muted); font-size: 14px; }
.footer div { display: grid; gap: 3px; }
.footer-links { display: flex; align-items: center; gap: 14px; }
@media (max-width: 860px) {
  .header-inner, .hero, .tool-grid, .band, .content-grid { grid-template-columns: 1fr; }
  .header-inner { align-items: flex-start; padding-top: 14px; padding-bottom: 14px; }
  h1 { font-size: 34px; }
  .main { padding-top: 26px; }
  .footer { align-items: flex-start; flex-direction: column; }
  .footer-links { align-items: flex-start; flex-direction: column; gap: 8px; }
}
@media (max-width: 520px) {
  .link-grid { grid-template-columns: 1fr; }
  .metric { grid-template-columns: 58px 1fr; }
}