:root {
  --color-bg: #141512;
  --color-surface: #1f211b;
  --color-surface-alt: #29261e;
  --color-text: #f4efe3;
  --color-muted: #b8b09d;
  --color-primary: #e8a84c;
  --color-primary-dark: #9f6224;
  --color-secondary: #7fd6c2;
  --color-accent: #ff6f61;
  --color-border: #454134;
  --font-heading: "Iowan Old Style", "Georgia", serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Mono", "Roboto Mono", monospace;
  --radius-sm: 8px;
  --radius-md: 18px;
  --radius-lg: 32px;
  --shadow-soft: 0 22px 70px rgba(0, 0, 0, .35);
  --shadow-panel: 0 1px 0 rgba(255,255,255,.06) inset, 0 26px 80px rgba(0,0,0,.32);
  --max: 1160px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 18% 10%, rgba(232,168,76,.12), transparent 28rem),
    radial-gradient(circle at 82% 18%, rgba(127,214,194,.10), transparent 26rem),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255,255,255,.025) 1px, transparent 1px),
    var(--color-bg);
  background-size: auto, auto, 42px 42px, 42px 42px, auto;
  color: var(--color-text);
  line-height: 1.65;
  min-width: 320px;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(244,239,227,.035) 0 1px, transparent 1px 5px);
  mix-blend-mode: overlay;
  opacity: .28;
  z-index: 100;
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--color-secondary); text-decoration: none; transition: color .2s ease, border-color .2s ease, transform .2s ease; }
a:hover { color: var(--color-primary); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 4px;
}

p { margin: 0 0 1rem; color: var(--color-muted); }
strong { color: var(--color-text); }

h1, h2, h3, h4 {
  color: var(--color-text);
  font-family: var(--font-heading);
  line-height: 1.05;
  letter-spacing: -.02em;
  margin: 0 0 1rem;
}

h1 { font-size: clamp(2.7rem, 7vw, 6.7rem); max-width: 980px; }
h2 { font-size: clamp(2rem, 4vw, 4.2rem); }
h3 { font-size: clamp(1.35rem, 2vw, 2rem); }

.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.section { padding: clamp(64px, 8vw, 120px) 0; position: relative; }
.section-tight { padding: clamp(42px, 6vw, 76px) 0; }
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .18em;
}
.section-kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  border: 1px solid var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(232,168,76,.08);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: rgba(20,21,18,.78);
  border-bottom: 1px solid rgba(244,239,227,.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--color-text);
  font-weight: 760;
  letter-spacing: -.03em;
}
.logo-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(232,168,76,.55);
  background: radial-gradient(circle at 50% 48%, rgba(232,168,76,.25), rgba(127,214,194,.08) 68%, transparent 70%);
  box-shadow: 0 0 0 7px rgba(232,168,76,.055);
  position: relative;
}
.logo-mark::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 18px rgba(127,214,194,.75);
}
.logo small { display: block; color: var(--color-muted); font-weight: 500; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: clamp(.55rem, 2vw, 1.35rem); flex-wrap: wrap; justify-content: flex-end; }
.main-nav a {
  color: var(--color-muted);
  font-size: .95rem;
  padding: .45rem .25rem;
  border-bottom: 1px solid transparent;
}
.main-nav a[aria-current="page"], .main-nav a:hover { color: var(--color-text); border-color: var(--color-primary); }

.hero {
  padding: clamp(72px, 10vw, 140px) 0 clamp(54px, 8vw, 100px);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "OPEN / HUMAN / LOOP";
  position: absolute;
  right: -8vw;
  top: 18%;
  font-family: var(--font-mono);
  font-size: clamp(2rem, 8vw, 8rem);
  line-height: .9;
  max-width: 580px;
  color: rgba(244,239,227,.025);
  letter-spacing: .06em;
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(330px, .85fr); gap: clamp(32px, 7vw, 86px); align-items: center; }
.hero-copy { position: relative; z-index: 1; }
.hero-lead {
  font-size: clamp(1.05rem, 1.8vw, 1.45rem);
  max-width: 690px;
  color: #d8d0be;
  margin-bottom: 1.7rem;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  min-height: 48px;
  padding: .86rem 1.15rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(232,168,76,.44);
  color: var(--color-text);
  background: linear-gradient(180deg, rgba(232,168,76,.24), rgba(159,98,36,.24));
  box-shadow: 0 12px 30px rgba(232,168,76,.09);
  font-weight: 720;
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); color: var(--color-text); border-color: var(--color-primary); }
.btn-secondary { background: rgba(244,239,227,.04); border-color: rgba(127,214,194,.38); box-shadow: none; }
.btn-secondary:hover { border-color: var(--color-secondary); }
.btn-ghost { background: transparent; border-color: rgba(244,239,227,.18); box-shadow: none; }

.console-panel {
  position: relative;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid rgba(244,239,227,.13);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.015)),
    linear-gradient(90deg, rgba(127,214,194,.07) 1px, transparent 1px),
    linear-gradient(180deg, rgba(127,214,194,.05) 1px, transparent 1px),
    var(--color-surface);
  background-size: auto, 25px 25px, 25px 25px, auto;
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}
.console-panel::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px dashed rgba(232,168,76,.18);
  border-radius: calc(var(--radius-lg) - 10px);
  pointer-events: none;
}
.console-panel img { display: block; margin: 0 auto 1.35rem; filter: drop-shadow(0 18px 30px rgba(0,0,0,.32)); }
.console-status { display: flex; flex-wrap: wrap; gap: .6rem; position: relative; z-index: 1; }
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  border: 1px solid rgba(244,239,227,.13);
  background: rgba(20,21,18,.6);
  color: var(--color-muted);
  padding: .45rem .65rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .75rem;
}
.status-pill::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--color-secondary); box-shadow: 0 0 13px rgba(127,214,194,.75); }
.status-pill.warning::before { background: var(--color-primary); box-shadow: 0 0 13px rgba(232,168,76,.8); }

.split { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(28px, 6vw, 74px); align-items: start; }
.split-reverse { grid-template-columns: 1.15fr .85fr; }
.section-note {
  border-left: 3px solid var(--color-primary);
  background: rgba(232,168,76,.08);
  padding: 1rem 1.15rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: #ddd3be;
}

/* Theme components */
.agent-loop {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border: 1px solid rgba(244,239,227,.14);
  background: rgba(244,239,227,.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}
.loop-cell {
  min-height: 210px;
  padding: 1.25rem;
  background: linear-gradient(180deg, rgba(31,33,27,.96), rgba(41,38,30,.96));
  position: relative;
}
.loop-cell::after {
  content: attr(data-step);
  position: absolute;
  right: 1rem;
  bottom: .85rem;
  color: rgba(232,168,76,.18);
  font-family: var(--font-mono);
  font-size: 2.4rem;
  line-height: 1;
}
.loop-cell h3 { font-size: 1.28rem; margin-bottom: .7rem; }
.loop-cell p { font-size: .95rem; }
.loop-line {
  position: absolute;
  left: 1.25rem;
  right: 1.25rem;
  top: 1rem;
  height: 2px;
  background: linear-gradient(90deg, var(--color-secondary), transparent 72%);
  opacity: .45;
}
.loop-node {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--color-secondary);
  background: var(--color-surface);
  box-shadow: 0 0 0 7px rgba(127,214,194,.08);
  margin-bottom: 1.2rem;
}

.human-signal {
  border: 1px solid rgba(255,111,97,.24);
  background:
    linear-gradient(135deg, rgba(255,111,97,.09), transparent 45%),
    rgba(31,33,27,.82);
  border-radius: 28px 28px 28px 8px;
  padding: 1.35rem;
  position: relative;
}
.human-signal::before {
  content: "human check";
  position: absolute;
  top: -11px;
  left: 1rem;
  padding: .1rem .45rem;
  border: 1px solid rgba(255,111,97,.35);
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-accent);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .64rem;
}

.trust-ledger {
  border: 1px solid rgba(244,239,227,.14);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: rgba(31,33,27,.8);
}
.ledger-row {
  display: grid;
  grid-template-columns: 150px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.1rem;
  border-top: 1px solid rgba(244,239,227,.1);
}
.ledger-row:first-child { border-top: 0; }
.ledger-row code { color: var(--color-primary); font-family: var(--font-mono); font-size: .82rem; }
.ledger-row span { color: var(--color-muted); }
.ledger-row b { color: var(--color-text); font-weight: 700; }
.ledger-tag { border: 1px solid rgba(127,214,194,.28); color: var(--color-secondary); padding: .25rem .5rem; border-radius: 999px; font-size: .75rem; white-space: nowrap; }

.intent-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.intent-card {
  border: 1px solid rgba(244,239,227,.13);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  min-height: 240px;
  background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
  position: relative;
  overflow: hidden;
}
.intent-card::after {
  content: "";
  position: absolute;
  width: 80px;
  height: 80px;
  right: -25px;
  bottom: -25px;
  border: 1px solid rgba(232,168,76,.2);
  border-radius: 50%;
}
.intent-card h3 { font-size: 1.35rem; }
.intent-card ul, .check-list { padding: 0; margin: 1rem 0 0; list-style: none; }
.intent-card li, .check-list li {
  position: relative;
  padding-left: 1.55rem;
  margin: .72rem 0;
  color: var(--color-muted);
}
.intent-card li::before, .check-list li::before {
  content: "↳";
  position: absolute;
  left: 0;
  color: var(--color-secondary);
  font-family: var(--font-mono);
}

.handoff-card {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 1rem;
  align-items: center;
  border: 1px solid rgba(244,239,227,.14);
  border-radius: 26px;
  padding: 1rem;
  background: rgba(41,38,30,.72);
}
.handoff-card + .handoff-card { margin-top: 1rem; }
.handoff-icon {
  height: 72px;
  width: 72px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  background: rgba(127,214,194,.08);
  border: 1px solid rgba(127,214,194,.18);
  font-family: var(--font-mono);
  color: var(--color-secondary);
}

.signal-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: var(--radius-md); }
.signal-table th, .signal-table td { padding: 1rem; border-bottom: 1px solid rgba(244,239,227,.11); text-align: left; vertical-align: top; }
.signal-table th { color: var(--color-primary); font-family: var(--font-mono); font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; }
.signal-table td { color: var(--color-muted); }
.signal-table tr:hover td { background: rgba(127,214,194,.045); }

.article-shell {
  display: grid;
  grid-template-columns: minmax(0, 760px) 280px;
  gap: clamp(28px, 6vw, 80px);
  align-items: start;
}
.article-body {
  background: rgba(31,33,27,.62);
  border: 1px solid rgba(244,239,227,.12);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 5vw, 54px);
}
.article-body h2 { font-size: clamp(1.8rem, 3vw, 3rem); margin-top: 2.4rem; }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { margin-top: 1.8rem; }
.article-aside { position: sticky; top: 100px; }
.toc-card {
  border: 1px solid rgba(244,239,227,.12);
  border-radius: var(--radius-md);
  padding: 1rem;
  background: rgba(41,38,30,.72);
}
.toc-card a { display: block; padding: .55rem 0; color: var(--color-muted); border-bottom: 1px solid rgba(244,239,227,.08); }
.toc-card a:last-child { border-bottom: 0; }

.qa-stack { max-width: 940px; margin: 0 auto; }
.qa-item {
  border: 1px solid rgba(244,239,227,.13);
  border-radius: var(--radius-md);
  background: rgba(31,33,27,.72);
  padding: 1.3rem;
  margin-bottom: 1rem;
}
.qa-item h2 { font-size: 1.45rem; display: flex; gap: .75rem; align-items: baseline; }
.qa-item h2::before { content: "Q"; font-family: var(--font-mono); color: var(--color-primary); font-size: .9rem; }
.qa-item p { margin-bottom: 0; }

.brief-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(28px, 6vw, 72px); align-items: start; }
.brief-form {
  border: 1px solid rgba(244,239,227,.14);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.045), rgba(255,255,255,.012));
  padding: clamp(22px, 4vw, 38px);
  box-shadow: var(--shadow-soft);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
label { display: grid; gap: .4rem; color: var(--color-text); font-weight: 650; margin-bottom: 1rem; }
label span { color: var(--color-muted); font-weight: 500; font-size: .85rem; }
input, textarea, select {
  width: 100%;
  border: 1px solid rgba(244,239,227,.16);
  border-radius: 14px;
  padding: .88rem 1rem;
  color: var(--color-text);
  background: rgba(20,21,18,.7);
  font: inherit;
}
textarea { min-height: 128px; resize: vertical; }
.form-note { font-size: .88rem; color: var(--color-muted); margin-top: .8rem; }

.metric-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.metric {
  border: 1px solid rgba(244,239,227,.13);
  border-radius: var(--radius-md);
  padding: 1rem;
  background: rgba(20,21,18,.38);
}
.metric b { font-family: var(--font-heading); font-size: 2rem; color: var(--color-primary); display: block; }
.metric span { color: var(--color-muted); font-size: .92rem; }

.footer {
  border-top: 1px solid rgba(244,239,227,.09);
  padding: 42px 0;
  background: rgba(12,13,11,.54);
}
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: start; }
.footer-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-nav a { color: var(--color-muted); }
.footer small { display: block; color: rgba(184,176,157,.7); margin-top: 1rem; }

.breadcrumbs { font-family: var(--font-mono); font-size: .78rem; color: var(--color-muted); margin-bottom: 1.2rem; }
.breadcrumbs a { color: var(--color-muted); }
.page-hero { padding: clamp(56px, 8vw, 110px) 0 clamp(36px, 6vw, 72px); border-bottom: 1px solid rgba(244,239,227,.08); }
.page-hero h1 { max-width: 980px; }
.page-hero p { max-width: 760px; font-size: clamp(1.03rem, 1.6vw, 1.28rem); }

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.surface-card {
  border: 1px solid rgba(244,239,227,.13);
  border-radius: var(--radius-md);
  background: rgba(31,33,27,.72);
  padding: 1.25rem;
}
.surface-card h3 { font-size: 1.35rem; }
.surface-card:hover { border-color: rgba(232,168,76,.38); transform: translateY(-2px); transition: .2s ease; }

.timeline { counter-reset: item; display: grid; gap: 1rem; }
.timeline-item {
  counter-increment: item;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1rem;
  align-items: start;
}
.timeline-item::before {
  content: counter(item, decimal-leading-zero);
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  border: 1px solid rgba(232,168,76,.34);
  color: var(--color-primary);
  font-family: var(--font-mono);
  background: rgba(232,168,76,.06);
}
.timeline-item > div { border-bottom: 1px solid rgba(244,239,227,.1); padding-bottom: 1.1rem; }

@media (prefers-reduced-motion: no-preference) {
  .console-panel img { animation: breathe 5.8s ease-in-out infinite; }
  .status-pill::before { animation: pulse 2.8s ease-in-out infinite; }
  @keyframes breathe { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
  @keyframes pulse { 0%, 100% { opacity: .55; transform: scale(.88); } 50% { opacity: 1; transform: scale(1.08); } }
}

@media (max-width: 980px) {
  .hero-grid, .split, .split-reverse, .brief-grid, .article-shell { grid-template-columns: 1fr; }
  .agent-loop { grid-template-columns: repeat(2, 1fr); }
  .intent-map, .card-grid, .metric-strip { grid-template-columns: 1fr 1fr; }
  .article-aside { position: static; }
}

@media (max-width: 740px) {
  .container { width: min(100% - 28px, var(--max)); }
  .header-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
  .main-nav { justify-content: flex-start; gap: .6rem 1rem; }
  .main-nav a { font-size: .9rem; padding: .15rem 0; }
  .hero { padding-top: 48px; }
  .agent-loop, .intent-map, .card-grid, .metric-strip, .form-row { grid-template-columns: 1fr; }
  .loop-cell { min-height: auto; }
  .ledger-row { grid-template-columns: 1fr; gap: .35rem; }
  .handoff-card { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .signal-table, .signal-table tbody, .signal-table tr, .signal-table td, .signal-table th { display: block; width: 100%; }
  .signal-table th { display: none; }
  .signal-table td { padding: .8rem 1rem; }
  .timeline-item { grid-template-columns: 1fr; }
}