:root {
  color-scheme: dark;
  --ink: #e7edf7;
  --muted: #a1b2c8;
  --paper: #090f1c;
  --surface: #101b2d;
  --line: #29384c;
  --cyan: #5be2f2;
  --green: #55cd9b;
  --amber: #ffbd69;
  --purple: #ac94ef;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: radial-gradient(ellipse at 85% 5%, #11303c66, transparent 32rem), var(--paper); color: var(--ink); font: 16px/1.65 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: var(--cyan); text-underline-offset: 4px; }
a:hover { color: #b2f4fa; }
button, select { font: inherit; }
button, .button { border: 1px solid #43566d; background: #17253a; color: var(--ink); border-radius: 8px; padding: .65rem 1rem; transition: background .18s, border-color .18s; }
button { cursor: pointer; }
button:hover, .button:hover { background: #243750; border-color: var(--cyan); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 4px; }
[hidden] { display: none !important; }
.wrap { width: min(1240px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; top: -100px; left: 16px; z-index: 50; background: var(--surface); padding: 12px; }
.skip-link:focus { top: 10px; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: #090f1cf2; backdrop-filter: blur(12px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-block: 19px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 800; font-size: 1.35rem; letter-spacing: -.035em; text-decoration: none; }
.brand-suffix { color: var(--muted); font: .65rem Consolas, monospace; letter-spacing: .13em; }
.brand-mark { border: 1px solid #3d7583; background: #11323e; padding: 3px 8px; border-radius: 6px; color: var(--cyan); font-family: Consolas, monospace; }
nav { display: flex; flex-wrap: wrap; gap: 20px; font-size: .9rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover { color: var(--cyan); }
.hero { padding-block: 76px 38px; }
.hero-grid { display: grid; grid-template-columns: 1.2fr 1fr; align-items: center; gap: 64px; }
.hero-grid > *, .explain-grid > *, .walkthrough-grid > * { min-width: 0; }
.eyebrow { color: var(--muted); text-transform: uppercase; letter-spacing: .13em; font-size: .76rem; font-weight: 700; }
h1 { font-size: clamp(2.6rem, 4.6vw, 4.5rem); line-height: 1.1; letter-spacing: -.05em; margin: 24px 0; font-weight: 700; }
h1 span { color: var(--cyan); }
h2 { font-size: clamp(1.85rem, 3vw, 2.7rem); letter-spacing: -.04em; line-height: 1.2; margin: 8px 0 22px; font-weight: 650; }
h3 { font-size: 1.08rem; margin: 0 0 12px; line-height: 1.4; }
p { margin: 0 0 16px; }
.intro { max-width: 560px; font-size: 1.08rem; color: #b5c5d9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 14px; }
.button { display: inline-block; text-decoration: none; }
.primary { background: var(--cyan); color: #081920; border-color: var(--cyan); font-weight: 700; }
.primary:hover { background: #9ceff8; color: #081920; }
.secondary { background: transparent; }
.disclaimer, .muted { color: var(--muted); font-size: .87rem; }
.status-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--green); margin-right: 7px; }
.hero-console { border: 1px solid #355066; border-radius: 14px; background: #0b1524; box-shadow: 0 24px 70px #0005; overflow: hidden; }
.terminal-head { display: flex; justify-content: space-between; gap: 12px; align-items: center; padding: 13px 18px; background: #132235; border-bottom: 1px solid var(--line); color: var(--muted); font: .72rem Consolas, monospace; }
.terminal-dots { color: #698095; letter-spacing: .1em; }
.terminal-tag { color: var(--cyan); }
.terminal-body { padding: 25px; }
.terminal-command { color: var(--cyan); font: .85rem/1.6 Consolas, monospace; }
.stack { list-style: none; padding: 0; margin: 20px 0; }
.stack li { position: relative; display: flex; justify-content: space-between; gap: 12px; padding: 13px 16px; margin-bottom: 14px; border: 1px solid var(--line); border-radius: 7px; background: #111e30; }
.stack li:not(:last-child)::after { content: "↓"; position: absolute; bottom: -19px; left: 50%; color: #6b859d; line-height: 1; }
.stack li.active { border-color: #398296; background: #10303c; }
.stack strong { font-size: .88rem; }
.stack span { color: var(--muted); font: .75rem/1.9 Consolas, monospace; }
.terminal-foot { border-top: 1px solid var(--line); padding-top: 15px; color: var(--muted); font-size: .78rem; }
.feature-strip { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; padding-top: 28px; margin-top: 60px; border-top: 1px solid var(--line); font-size: .85rem; color: var(--muted); }
.feature-strip strong { color: var(--cyan); margin-right: 8px; }
.article-index { border-block: 1px solid var(--line); padding-block: 22px; align-items: center; gap: 12px 24px; }
.article-index .eyebrow { margin-right: 12px; }
.writeup { padding-block: 62px; border-bottom: 1px solid var(--line); }
section[id], h2[id] { scroll-margin-top: 100px; }
.prose { max-width: 880px; color: #b5c5d9; }
.prose p:last-child { margin-bottom: 0; }
.flow-track { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; padding: 0; margin: 28px 0 20px; list-style: none; }
.flow-track li { padding: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.flow-track strong, .flow-track li > span:last-child { display: block; }
.flow-number, .number { display: block; font: .75rem/1.5 Consolas, monospace; color: var(--cyan); margin-bottom: 12px; letter-spacing: .08em; }
.flow-track li > span:last-child { color: var(--muted); font-size: .87rem; margin-top: 8px; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-block: 28px; }
.cards article, .panel { padding: 26px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.cards p, .panel p, .panel li { color: #b5c5d9; font-size: .94rem; }
.cards p:last-child, .panel p:last-child { margin-bottom: 0; }
.explain-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; margin-block: 26px; }
code, pre { font-family: Consolas, "Cascadia Code", monospace; }
code { font-size: .88em; color: #b4e8f0; overflow-wrap: anywhere; }
pre { margin: 0; padding: 22px; overflow-x: auto; background: #080f1b; border: 1px solid var(--line); border-radius: 9px; font-size: .82rem; line-height: 1.85; }
pre code { color: #c5d5e7; font-size: inherit; overflow-wrap: normal; }
.code-label { margin-top: 22px; font: .72rem/1.5 Consolas, monospace; color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.technical-table { overflow-x: auto; margin-block: 26px; border: 1px solid var(--line); border-radius: 10px; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; text-align: left; }
caption { padding: 15px 20px; text-align: left; color: var(--muted); font-size: .8rem; background: #0c1423; }
th, td { padding: 17px 20px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--ink); background: #132033; font-weight: 600; }
td { color: #b5c5d9; }
tr:last-child td { border-bottom: 0; }
.workspace { background: #0c1423; border-block: 1px solid var(--line); padding-block: 55px; }
.section-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.badge { display: inline-block; border: 1px solid #346371; background: #102e36; color: #91e5ef; border-radius: 30px; padding: 5px 12px; font-size: .75rem; }
.badge.caution { color: var(--amber); background: #292316; border-color: #786139; }
.scenario-controls { display: flex; gap: 10px; flex-wrap: wrap; padding-block: 22px; }
.scenario-controls button { font-size: .86rem; }
.scenario-controls button[aria-pressed="true"] { background: #10303c; color: var(--cyan); border-color: var(--cyan); }
.walkthrough-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; }
.walkthrough-card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 28px; }
.walkthrough-card h3 { font-size: 1.35rem; }
.request-line { display: flex; flex-wrap: wrap; gap: 8px 22px; border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 22px; }
.request-line span { font: .78rem/1.8 Consolas, monospace; color: var(--muted); }
.steps { padding-left: 22px; margin: 0; }
.steps li { padding-left: 6px; padding-bottom: 16px; color: #b5c5d9; font-size: .93rem; }
.steps li::marker { color: var(--cyan); font-family: Consolas, monospace; }
.steps li:last-child { padding-bottom: 0; }
.result { padding: 20px; border-left: 3px solid var(--cyan); background: #102734; border-radius: 0 6px 6px 0; margin-bottom: 20px; }
.result[data-tone="blocked"] { border-color: var(--amber); background: #242219; }
.result[data-tone="skipped"] { border-color: var(--purple); background: #201f33; }
.result strong { display: block; margin-block: 7px; font: .85rem/1.6 Consolas, monospace; overflow-wrap: anywhere; }
.result p { font-size: .9rem; color: #b5c5d9; margin-bottom: 0; }
.note { padding: 22px 25px; border-left: 3px solid var(--amber); border-radius: 0 8px 8px 0; background: #211f1a; color: #d7c9b0; margin-block: 26px; font-size: .94rem; }
.note p:last-child { margin-bottom: 0; }
.checklist { padding-left: 22px; color: #b5c5d9; }
.checklist li { margin-bottom: 13px; padding-left: 7px; }
.checklist li::marker { color: var(--cyan); }
.evidence { display: grid; gap: 12px; margin-top: 24px; }
.evidence > div { display: flex; justify-content: space-between; align-items: center; gap: 18px; border: 1px solid var(--line); border-radius: 8px; padding: 16px 20px; background: var(--surface); }
.evidence span { color: var(--muted); font-size: .9rem; }
.evidence strong { font: .78rem/1.6 Consolas, monospace; color: var(--green); text-align: right; }
.evidence .pending { color: var(--amber); }
.resources { padding-block: 60px; }
.resources a { overflow-wrap: anywhere; }
.site-footer { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 18px; padding-block: 25px 36px; border-top: 1px solid var(--line); font-size: .82rem; color: var(--muted); }
.site-footer p { margin: 0; }
@media (max-width: 1000px) {
  .hero-grid { gap: 32px; }
  .header-inner { gap: 16px; }
  .brand-suffix { display: none; }
  .flow-track { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cards { grid-template-columns: 1fr; }
  .hero-console .stack li { flex-direction: column; gap: 0; }
}
@media (max-width: 760px) {
  .wrap { width: calc(100% - 36px); }
  .site-header { position: static; }
  .header-inner { flex-wrap: wrap; padding-block: 17px; }
  .site-header nav { gap: 12px 20px; font-size: .82rem; }
  .hero { padding-top: 38px; }
  .hero-grid, .explain-grid, .walkthrough-grid { grid-template-columns: 1fr; }
  .hero-console .stack li { flex-direction: row; }
  .feature-strip { margin-top: 34px; gap: 14px; }
  .feature-strip span { flex-basis: 44%; }
  .article-index { gap: 12px 20px; font-size: .82rem; }
  .article-index .eyebrow { flex-basis: 100%; }
  .writeup, .workspace { padding-block: 40px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 0; }
  .section-heading .badge { margin-bottom: 18px; }
  section[id], h2[id] { scroll-margin-top: 24px; }
}
@media (max-width: 440px) {
  .flow-track { grid-template-columns: 1fr; }
  .hero-console .stack li { flex-direction: column; }
  .terminal-body, .walkthrough-card, .cards article, .panel { padding: 20px; }
  .evidence > div { flex-direction: column; align-items: flex-start; gap: 6px; }
  .evidence strong { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}