:root {
  color-scheme: light;
  --ink: #0d2438;
  --muted: #5a6c7c;
  --paper: #f4f8fa;
  --surface: #ffffff;
  --line: #d7e2e8;
  --navy: #0a3049;
  --teal: #007f78;
  --teal-dark: #00625e;
  --aqua: #dff5f2;
  --amber: #f2b84b;
  --shadow: 0 20px 60px rgba(8, 45, 67, 0.12);
  --radius: 22px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); }
a { color: inherit; }
button, code, pre { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: 0.65; }
.shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 20; padding: 10px 14px; color: white; background: var(--navy); }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 12px max(24px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(215, 226, 232, 0.9);
  background: rgba(244, 248, 250, 0.92);
  backdrop-filter: blur(14px);
}
.brand { display: inline-flex; align-items: center; min-height: 44px; gap: 12px; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 42px; aspect-ratio: 1; border-radius: 12px; color: white; background: var(--teal); font-weight: 800; letter-spacing: -0.04em; }
.brand strong, .brand small { display: block; }
.brand strong { line-height: 1.1; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }
.site-header nav { display: flex; gap: 6px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: white; }
.site-header nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 6px 11px; border-radius: 999px; color: var(--muted); font-size: 0.86rem; text-decoration: none; }
.site-header nav a[aria-current="page"] { color: white; background: var(--navy); }

.hero { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 42px; align-items: center; min-height: 620px; padding-block: 78px 64px; }
.hero h1 { max-width: 800px; margin: 12px 0 20px; font-size: clamp(2.7rem, 6vw, 5.4rem); line-height: 0.98; letter-spacing: -0.055em; }
.eyebrow { margin: 0; color: var(--teal-dark); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }
.lede { max-width: 720px; margin: 0; color: var(--muted); font-size: 1.14rem; }
.status-strip { display: flex; align-items: center; gap: 10px; margin-top: 28px; padding: 13px 16px; border: 1px solid #b9ddd9; border-radius: 14px; background: var(--aqua); font-size: 0.92rem; font-weight: 700; }
.status-dot { flex: 0 0 10px; width: 10px; height: 10px; border-radius: 999px; background: var(--amber); box-shadow: 0 0 0 5px rgba(242, 184, 75, 0.18); }
[data-native-status][data-state="ready"] + .status-dot, .status-dot:has(+ [data-native-status][data-state="ready"]) { background: var(--teal); }
.dataset-status { margin: 12px 0 0; color: var(--muted); font-size: 0.84rem; }
.tool-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none; }
.tool-chips li { padding: 6px 12px; border: 1px solid #b9ddd9; border-radius: 999px; background: var(--surface); }
.tool-chips code { color: var(--teal-dark); font-size: 0.82rem; font-weight: 700; }
.browser-hint { max-width: 720px; margin: 12px 0 0; color: var(--muted); font-size: 0.84rem; line-height: 1.6; }
.browser-hint strong { color: var(--ink); }
.lede-sub { margin-top: 14px; font-size: 1.02rem; }
.browser-hint code { padding: 1px 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); font-size: 0.78rem; overflow-wrap: anywhere; }
.browser-hint a { color: var(--teal-dark); font-weight: 700; }
.browser-setup { max-width: 720px; margin-top: 12px; color: var(--muted); font-size: .84rem; }
.browser-setup summary { min-height: 44px; padding: 10px 0; color: var(--teal-dark); font-weight: 800; cursor: pointer; }
.browser-setup .browser-hint { margin-top: 4px; padding: 12px 14px; border-left: 3px solid var(--teal); background: rgba(255,255,255,.65); }
.prompt-card { position: relative; padding: 30px; border-radius: var(--radius); color: white; background: linear-gradient(145deg, #0a3049, #0c4e63); box-shadow: var(--shadow); overflow: hidden; }
.prompt-card::before { content: ""; position: absolute; right: -70px; bottom: -90px; width: 240px; height: 240px; border-radius: 50%; background: rgba(87, 211, 197, 0.14); }
.prompt-card > * { position: relative; }
.prompt-card > span { display: inline-block; padding: 5px 9px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px; color: #ccefeb; font-size: 0.72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.prompt-card blockquote { margin: 28px 0 24px; font-size: 1.25rem; line-height: 1.55; }
.prompt-card p { margin: 0; color: #bbd3df; font-size: 0.85rem; }

.metrics { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: 100px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: 0 14px 40px rgba(8,45,67,.07); overflow: hidden; }
.metrics article { padding: 24px; border-right: 1px solid var(--line); }
.metrics article:last-child { border-right: 0; }
.metrics strong, .metrics span { display: block; }
.metrics strong { font-size: 2.2rem; line-height: 1; }
.metrics span { margin-top: 8px; color: var(--muted); font-size: .84rem; }

.journey, .boundary { padding-block: 16px 100px; }
.section-heading { max-width: 760px; margin-bottom: 36px; }
.section-heading h2, .console h2, .evidence h2 { margin: 8px 0 12px; font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.05; letter-spacing: -.04em; }
.section-heading > p:last-child { color: var(--muted); }
.tool-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.tool-card { display: flex; flex-direction: column; min-height: 310px; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); transition: transform .18s ease, box-shadow .18s ease; }
.tool-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tool-card .step { color: var(--teal-dark); font-size: .73rem; font-weight: 800; letter-spacing: .1em; }
.tool-card h3 { margin: 18px 0 8px; font-size: 1.25rem; }
.tool-card p { margin: 0 0 18px; color: var(--muted); }
.input-example { margin-top: auto; border: 1px solid #d7e7eb; border-radius: 12px; background: #f4f9fa; overflow: hidden; }
.input-example > summary { min-height: 42px; padding: 11px 12px; color: #255064; font-size: .8rem; font-weight: 750; cursor: pointer; }
.input-example[open] > summary { border-bottom: 1px solid #d7e7eb; }
.input-preview { display: block; padding: 12px; color: #255064; background: #f4f9fa; font-size: .78rem; overflow-wrap: anywhere; }
.tool-card button { margin-top: 14px; padding: 12px 16px; border: 0; border-radius: 12px; color: white; background: var(--teal); font-weight: 800; text-align: left; }
.tool-card button:hover { background: var(--teal-dark); }
.tool-card button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--navy); outline-offset: 3px; }
.site-header nav a[aria-current="page"]:focus-visible { outline-color: var(--amber); }

.console { margin-bottom: 100px; border-radius: 26px; color: #e7f3f7; background: #071e2c; box-shadow: var(--shadow); overflow: hidden; }
.console-head { display: flex; justify-content: space-between; gap: 30px; align-items: flex-end; padding: 32px; border-bottom: 1px solid #1d3a49; }
.console-head h2 { margin-bottom: 0; font-size: clamp(1.8rem, 3vw, 2.6rem); }
.console-head h2:focus { outline: 3px solid #70d2c7; outline-offset: 6px; }
.console-head > span { color: #8eabb8; font-size: .78rem; }
.console .eyebrow { color: #70d2c7; }
.console-grid { display: grid; grid-template-columns: .85fr 1.15fr; }
.console-grid section { min-width: 0; padding: 28px 32px 34px; }
.console-grid section + section { border-left: 1px solid #1d3a49; }
.console h3 { margin: 0 0 12px; color: #8eabb8; font-size: .76rem; letter-spacing: .09em; text-transform: uppercase; }
.console pre { min-height: 260px; max-height: 520px; margin: 0; padding: 18px; border: 1px solid #214150; border-radius: 14px; color: #c7f0ea; background: #03141e; font-size: .78rem; line-height: 1.65; white-space: pre-wrap; overflow: auto; }
.technical-details { border: 1px solid #214150; border-radius: 12px; background: rgba(3, 20, 30, .55); }
.technical-details > summary { min-height: 44px; padding: 12px 14px; color: #9fdcd4; font-size: .82rem; font-weight: 750; cursor: pointer; }
.technical-details[open] > summary { border-bottom: 1px solid #214150; }
.technical-details pre { border: 0; border-radius: 0 0 12px 12px; }

.evidence { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; margin-bottom: 100px; padding: 36px; border: 1px solid #b9ddd9; border-radius: 26px; background: var(--aqua); }
.evidence h2 { font-size: clamp(2rem, 3vw, 3rem); }
.evidence p { max-width: 720px; }
.evidence-note { color: var(--muted); font-size: .85rem; }
.counter { display: grid; place-items: center; min-width: 180px; aspect-ratio: 1; border-radius: 50%; color: white; background: var(--teal); text-align: center; }
.counter[data-state="unavailable"] { background: var(--navy); }
.counter[data-state="unavailable"] strong { font-size: 3rem; }
.counter strong { display: block; font-size: 4rem; line-height: 1; }
.counter span { display: block; max-width: 100px; margin-top: 4px; font-size: .72rem; }
.event-list { grid-column: 1 / -1; display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.event-list li { display: grid; grid-template-columns: 100px 1fr auto; gap: 12px; padding: 10px 12px; border-radius: 10px; background: rgba(255,255,255,.65); font-size: .8rem; }
.event-list time, .event-list span { color: var(--muted); }
.event-list details { grid-column: 1 / -1; }
.event-list summary { cursor: pointer; color: var(--teal); font-weight: 700; }
.event-list pre { max-height: 260px; margin: 8px 0 0; padding: 12px; overflow: auto; border-radius: 8px; color: #dff7f4; background: var(--navy); white-space: pre-wrap; overflow-wrap: anywhere; }

.boundary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.boundary-grid article { padding: 24px; border-left: 4px solid var(--teal); border-radius: 0 16px 16px 0; background: white; }
.boundary-grid h3 { margin: 0 0 10px; }
.boundary-grid p { margin: 0; color: var(--muted); font-size: .9rem; }
.source-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.source-links a { padding: 10px 14px; border: 1px solid var(--line); border-radius: 999px; color: var(--teal-dark); background: white; font-weight: 700; text-decoration: none; }

.site-footer { display: flex; justify-content: space-between; gap: 20px; padding-block: 28px 44px; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-links a { color: var(--teal-dark); font-weight: 700; text-decoration: none; border-bottom: 1px solid rgba(0, 98, 94, .35); }
.footer-links a:hover, .footer-links a:focus-visible { color: var(--navy); border-bottom-color: var(--navy); }

.brief { display: grid; grid-template-columns: 1.35fr 1fr; gap: 40px; align-items: center; margin-bottom: 100px; padding: 38px 40px; border: 1px solid #b9ddd9; border-radius: 26px; background: linear-gradient(140deg, #ffffff, var(--aqua)); }
.brief h2 { margin: 6px 0 14px; font-size: clamp(1.7rem, 2.4vw, 2.3rem); }
.brief p { max-width: 640px; margin: 0; color: var(--muted); }
.brief .brief-summary { margin-top: 16px; color: var(--ink); font-weight: 750; }
.brief strong { color: var(--ink); }
.brief-reqs { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.brief-reqs li { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); font-size: .9rem; }
.brief-reqs span { color: var(--muted); }
.brief-reqs strong { color: var(--teal-dark); font-size: .84rem; letter-spacing: .02em; text-transform: uppercase; }

.output-note { margin: 0 0 14px; padding: 14px 16px; border-left: 3px solid var(--teal); border-radius: 0 10px 10px 0; background: rgba(0, 127, 120, .12); color: #d3f2ed; font-size: .86rem; line-height: 1.65; }

.contrast { margin-bottom: 100px; }
.contrast-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.contrast-grid article { padding: 30px 32px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: 0 14px 40px rgba(8,45,67,.07); }
.contrast-grid h3 { margin: 0 0 14px; font-size: 1.05rem; }
.contrast-grid p { margin: 0; color: var(--muted); font-size: .93rem; line-height: 1.7; }
.contrast-grid code { padding: 1px 6px; border-radius: 6px; background: var(--paper); font-size: .82rem; overflow-wrap: anywhere; }
.contrast-before { border-top: 4px solid #d99a3c; }
.contrast-after { border-top: 4px solid var(--teal); }
.contrast-verdict { margin-top: 16px !important; font-weight: 700; }
.contrast-before .contrast-verdict { color: #8a570e; }
.contrast-after .contrast-verdict { color: var(--teal-dark); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 60px; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .metrics article:nth-child(2) { border-right: 0; }
  .metrics article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .console-grid { grid-template-columns: 1fr; }
  .console-grid section + section { border-left: 0; border-top: 1px solid #1d3a49; }
  .boundary-grid { grid-template-columns: 1fr; }
  .brief { grid-template-columns: 1fr; gap: 28px; padding: 30px 26px; }
  .brief-reqs li { flex-wrap: wrap; }
  .contrast-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 24px, 1180px); }
  .site-header { padding-inline: 12px; }
  .brand small { display: none; }
  .hero h1 { font-size: clamp(2.45rem, 15vw, 4rem); }
  .tool-grid { grid-template-columns: 1fr; }
  .console-head { display: block; }
  .console-head > span { display: block; margin-top: 12px; }
  .evidence { grid-template-columns: 1fr; padding: 24px; }
  .counter { min-width: 150px; width: 150px; }
  .event-list li { grid-template-columns: 1fr; }
  .site-footer { display: grid; }
  .footer-links { gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}