:root {
  --ink: #071313;
  --ink-soft: #102221;
  --paper: #f4f5ef;
  --paper-soft: #e8ebe1;
  --muted: #66716d;
  --line: #cbd0c6;
  --teal: #1fc2ae;
  --teal-dark: #0d6f67;
  --acid: #d7ff5f;
  --orange: #ff9f68;
  --blue: #79a7ff;
  --white: #fffef9;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, Aptos, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.6;
}

a { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 0.9rem;
  background: var(--acid);
  color: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.site-header {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--max), calc(100% - 3rem));
  margin: 0 auto;
  padding: 1.4rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--white);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 0.45rem;
  color: var(--acid);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.75rem;
  font-weight: 800;
}

.site-nav { display: flex; align-items: center; gap: 1.75rem; font-size: 0.9rem; }
.site-nav a { color: #c8d1cd; text-decoration: none; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--acid); }
.site-nav__primary { padding: 0.55rem 0.85rem; border: 1px solid #50605d; border-radius: 999px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(390px, 0.75fr);
  gap: clamp(3rem, 8vw, 7rem);
  min-height: 760px;
  margin-top: -5.5rem;
  padding: 11rem max(1.5rem, calc((100vw - var(--max)) / 2)) 7rem;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 22%, rgba(31, 194, 174, 0.16), transparent 27%),
    linear-gradient(145deg, #071313 0%, #0a1918 64%, #0c201e 100%);
  color: var(--white);
}

.hero__copy { position: relative; z-index: 1; }
.kicker, .section__label { margin: 0 0 1.25rem; color: var(--teal-dark); font-size: 0.73rem; font-weight: 800; letter-spacing: 0.15em; text-transform: uppercase; }
.kicker { display: flex; align-items: center; gap: 0.55rem; color: #9db1aa; }
.signal { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--acid); box-shadow: 0 0 0 5px rgba(215,255,95,.1); }

h1, h2, h3 { margin-top: 0; font-family: "Aptos Display", Aptos, "Segoe UI", sans-serif; letter-spacing: -0.045em; }
h1 { max-width: 14ch; margin-bottom: 1.5rem; font-size: clamp(3.35rem, 7.2vw, 6.7rem); line-height: 0.94; }
h1 span { color: var(--acid); }
h2 { margin-bottom: 1rem; font-size: clamp(2.25rem, 4.2vw, 4rem); line-height: 1.03; }
h3 { font-size: 1.3rem; }

.hero__lede { max-width: 42rem; margin: 0; color: #b8c4c0; font-size: clamp(1.08rem, 2vw, 1.32rem); }
.actions { display: flex; flex-wrap: wrap; gap: 0.8rem; margin: 2.25rem 0 1.2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 0.75rem; min-height: 3.15rem; padding: 0.78rem 1.1rem; border: 1px solid transparent; border-radius: 0.45rem; font-size: 0.92rem; font-weight: 750; text-decoration: none; transition: transform 160ms ease, background 160ms ease; }
.button:hover { transform: translateY(-2px); }
.button--primary { background: var(--acid); color: var(--ink); }
.button--quiet { border-color: #485754; color: var(--white); }
.button--light { background: var(--white); color: var(--ink); }
.hero__proof { max-width: 38rem; color: #788c85; font-size: 0.82rem; }

.system-card {
  position: relative;
  padding: 1rem;
  border: 1px solid #354744;
  border-radius: 0.9rem;
  background: rgba(3, 15, 14, 0.78);
  box-shadow: 0 35px 90px rgba(0,0,0,.34);
  font-family: "Cascadia Mono", Consolas, monospace;
}
.system-card::before { content: ""; position: absolute; inset: -1.3rem; z-index: -1; border: 1px solid rgba(31,194,174,.12); border-radius: 1.3rem; }
.system-card__top, .system-card__footer { display: flex; justify-content: space-between; gap: 1rem; color: #71847e; font-size: 0.7rem; }
.system-card__top { padding: 0.1rem 0.2rem 1rem; }
.system-card__state { color: var(--acid); }
.node { display: flex; align-items: center; justify-content: space-between; min-height: 5rem; padding: 0.9rem 1rem; border: 1px solid #31433f; border-left: 3px solid var(--teal); border-radius: 0.5rem; background: #102220; }
.node--server { border-left-color: var(--acid); }
.node--report { border-left-color: var(--blue); }
.node strong, .node__target { display: block; }
.node strong { margin-top: 0.28rem; color: #eef3ef; font-size: 0.85rem; }
.node__target { color: #7e938c; font-size: 0.68rem; }
.node__lang { padding: 0.27rem 0.45rem; border: 1px solid #3a4e49; border-radius: 0.3rem; color: #9eb0aa; font-size: 0.65rem; }
.edge { position: relative; height: 3.25rem; margin-left: 2rem; border-left: 1px dashed #45635b; }
.edge::after { content: ""; position: absolute; bottom: -1px; left: -4px; width: 7px; height: 7px; border-right: 1px solid var(--teal); border-bottom: 1px solid var(--teal); transform: rotate(45deg); }
.edge span { position: absolute; top: 50%; left: 0.75rem; color: #627871; font-size: 0.62rem; transform: translateY(-50%); }
.system-card__footer { padding: 1rem 0.2rem 0.1rem; }

.section { width: min(var(--max), calc(100% - 3rem)); margin: 0 auto; padding: 7rem 0; }
.section--statement { display: grid; grid-template-columns: 0.35fr 2fr 1fr; gap: 2rem; align-items: start; border-bottom: 1px solid var(--line); }
.section--statement h2 { max-width: 18ch; margin: 0; font-size: clamp(2rem, 3.8vw, 3.55rem); }
.section--statement > p:last-child { margin: 0; color: var(--muted); }
.section__heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.5rem; }
.section__heading h2 { margin-bottom: 0; }
.text-link { color: var(--teal-dark); font-size: 0.9rem; font-weight: 750; text-decoration: none; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.steps li { min-height: 15rem; padding: 1.4rem; border-right: 1px solid var(--line); }
.steps li:first-child { border-left: 1px solid var(--line); }
.steps span, .card-index { color: var(--teal-dark); font-family: "Cascadia Mono", Consolas, monospace; font-size: 0.7rem; }
.steps strong { display: block; margin: 3.5rem 0 0.4rem; font-size: 1.15rem; }
.steps p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.levels-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.level-card { min-height: 20rem; padding: 1.7rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.level-card__tag { display: inline-flex; padding: 0.35rem 0.55rem; border: 1px solid var(--line); border-radius: 999px; color: var(--teal-dark); font-family: "Cascadia Mono", Consolas, monospace; font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.08em; }
.level-card h3 { margin: 4.5rem 0 0.75rem; font-size: 1.4rem; }
.level-card p { color: var(--muted); font-size: 0.92rem; }
.level-card a { color: var(--teal-dark); font-size: 0.84rem; font-weight: 750; text-decoration: none; }
.level-card--beginner { background: color-mix(in srgb, var(--acid) 8%, transparent); }
.level-card--intermediate { background: color-mix(in srgb, var(--teal) 6%, transparent); }
.level-card--expert { background: color-mix(in srgb, var(--ink) 3%, transparent); }

.section--code { display: grid; grid-template-columns: 0.85fr 1.15fr; width: 100%; max-width: none; padding: 7rem max(1.5rem, calc((100vw - var(--max)) / 2)); align-items: center; gap: clamp(3rem, 8vw, 8rem); background: var(--teal-dark); color: var(--white); }
.code-copy p:not(.section__label) { max-width: 34rem; color: #bcd4cf; }
.code-copy .section__label { color: var(--acid); }
.terminal { overflow: hidden; border: 1px solid rgba(255,255,255,.16); border-radius: 0.75rem; background: var(--ink); box-shadow: 0 28px 60px rgba(0,0,0,.2); }
.terminal__bar { display: flex; align-items: center; gap: 0.4rem; padding: 0.75rem 1rem; border-bottom: 1px solid #263937; }
.terminal__bar span { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: #475b57; }
.terminal__bar b { margin-left: auto; color: #687c77; font: 500 0.65rem "Cascadia Mono", Consolas, monospace; }
.terminal pre { margin: 0; padding: 1.5rem; overflow-x: auto; color: #cad5d1; font: 0.8rem/1.85 "Cascadia Mono", Consolas, monospace; }
.prompt { color: var(--teal); }
.ok, .output { color: var(--acid); }

.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.platform-grid article { min-height: 18rem; padding: 1.45rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.platform-grid h3 { margin: 4rem 0 0.7rem; }
.platform-grid p { color: var(--muted); font-size: 0.9rem; }
.platform-grid a { color: var(--teal-dark); font-size: 0.84rem; font-weight: 750; text-decoration: none; }

.status-section { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 5rem; border-top: 1px solid var(--line); }
.status-section__intro p:not(.section__label) { color: var(--muted); }
.status-list > div { display: grid; grid-template-columns: auto 0.8fr 1.4fr; gap: 0.8rem; padding: 1.35rem 0; align-items: baseline; border-bottom: 1px solid var(--line); }
.status-list p { margin: 0; color: var(--muted); font-size: 0.88rem; }
.status-dot { width: 0.55rem; height: 0.55rem; border-radius: 50%; background: var(--teal); }
.status-dot--partial { background: var(--orange); }
.status-dot--planned { background: #89918d; }

.final-cta { padding: 8rem 1.5rem; text-align: center; background: var(--paper-soft); }
.final-cta h2 { max-width: 14ch; margin-right: auto; margin-left: auto; }
.site-footer { display: grid; grid-template-columns: 1fr 1fr 1fr; padding: 2.5rem max(1.5rem, calc((100vw - var(--max)) / 2)); align-items: center; background: var(--ink); color: #8fa09a; font-size: 0.78rem; }
.site-footer .brand { color: var(--white); }
.site-footer p:nth-child(2) { text-align: center; }
.site-footer p:last-child { text-align: right; }

:focus-visible { outline: 3px solid var(--acid); outline-offset: 3px; }

@media (max-width: 920px) {
  .site-nav a:not(.site-nav__primary) { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 10rem; }
  .system-card { width: min(100%, 35rem); }
  .section--statement { grid-template-columns: 1fr; }
  .steps, .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .levels-grid { grid-template-columns: 1fr; }
  .level-card { min-height: auto; }
  .level-card h3 { margin-top: 2rem; }
  .section--code, .status-section { grid-template-columns: 1fr; }
}

@media (max-width: 580px) {
  body { font-size: 16px; }
  .site-header { width: min(100% - 2rem, var(--max)); }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-right: 1rem; padding-bottom: 4rem; padding-left: 1rem; }
  h1 { font-size: clamp(3rem, 17vw, 4.4rem); }
  .system-card::before { display: none; }
  .section { width: min(100% - 2rem, var(--max)); padding: 4.5rem 0; }
  .section__heading { display: block; }
  .steps, .platform-grid { grid-template-columns: 1fr; }
  .steps li { min-height: 11rem; border-left: 1px solid var(--line); }
  .steps strong { margin-top: 2rem; }
  .section--code { width: 100%; padding: 4.5rem 1rem; }
  .status-list > div { grid-template-columns: auto 1fr; }
  .status-list p { grid-column: 2; }
  .site-footer { grid-template-columns: 1fr; gap: 1rem; text-align: left; }
  .site-footer p:nth-child(2), .site-footer p:last-child { margin: 0; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}