:root {
  --ink: #0E1A24;
  --ink-2: #16283A;
  --ink-line: #3A5266;
  --paper: #F4F2EC;
  --paper-2: #ECE8DE;
  --card: #FBFAF6;
  --line: #DDD8CC;
  --text-soft: #4A5260;
  --text-soft-dark: #B9C4CE;
  --muted: #5B6270;
  --accent: #E8833A;
  --accent-ink: #A34E15;
  --blue: #2F6DB5;
  --radius: 16px;
  --font-head: 'Space Grotesk', Arial, sans-serif;
  --font-body: 'Inter', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--font-head); line-height: 1.1; margin: 0; }
p { margin: 0; }

.wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* nav */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(14, 26, 36, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(58, 82, 102, 0.6);
  color: var(--paper);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--font-head); font-weight: 700; font-size: 22px; letter-spacing: -0.3px; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { text-decoration: none; font-size: 15px; color: var(--text-soft-dark); }
.nav-links a:hover { color: var(--paper); }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--paper); margin: 5px 0; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font: 600 16px/1 var(--font-body);
  padding: 15px 24px; border-radius: 12px; border: 2px solid transparent;
  cursor: pointer; text-decoration: none; transition: transform .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: var(--ink); }
.btn-primary:hover { background: #F0954F; }
.btn-ghost { border-color: var(--ink-line); color: var(--paper); }
.btn-ghost-light { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-sm { padding: 10px 16px; font-size: 14px; }
.btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }

/* sections */
.section { padding: 104px 0; }
.dark { background: var(--ink); color: var(--paper); }
.light { background: var(--paper); }
.light.alt { background: var(--paper-2); }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 2.5px; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 14px; }
.dark .eyebrow { color: var(--accent); }
.section h2 { font-size: clamp(32px, 4.4vw, 52px); font-weight: 600; letter-spacing: -0.8px; max-width: 900px; margin-bottom: 48px; }
.accent { color: var(--accent); }
.muted { color: var(--text-soft); }
.muted-dark { color: var(--text-soft-dark); }
.dark .muted-dark { margin-top: 32px; }

/* hero */
.hero { padding: 120px 0 104px; background: radial-gradient(circle at 85% 30%, #1F3A4F 0%, var(--ink) 55%); }
.hero h1 { font-size: clamp(42px, 7vw, 88px); font-weight: 700; letter-spacing: -2px; margin-bottom: 28px; }
.lead { font-size: clamp(18px, 2vw, 21px); color: var(--text-soft-dark); max-width: 760px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }

.chain { list-style: none; padding: 0; margin: 64px 0 0; display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.chain li {
  font-family: var(--font-mono); font-size: 15px;
  padding: 10px 16px; border: 1.5px solid var(--ink-line); border-radius: 10px;
  position: relative; margin-right: 26px;
}
.chain li::after { content: ''; position: absolute; right: -28px; top: 50%; width: 18px; height: 2px; background: var(--accent); }
.chain li::before { content: ''; position: absolute; right: -29px; top: calc(50% - 4px); border: 5px solid transparent; border-left-color: var(--accent); border-right: 0; }
.chain li:last-child { margin-right: 0; }
.chain li:last-child::after, .chain li:last-child::before { display: none; }
.chain li.end { background: var(--accent); border-color: var(--accent); color: var(--ink); font-weight: 600; }
.chain-light { margin: 0 0 40px; }
.chain-light li { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chain-light li::after { background: var(--accent-ink); }
.chain-light li::before { border-left-color: var(--accent-ink); }

/* grids & cards */
.grid { display: grid; gap: 20px; }
.grid.two { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four { grid-template-columns: repeat(4, 1fr); }
.span-2 { grid-column: span 2; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.card h3 { font-size: 22px; font-weight: 600; margin-bottom: 10px; }
.card p { color: var(--text-soft); }
.card-dark { background: transparent; border: 1.5px solid var(--ink-line); }
.card-dark p { color: var(--text-soft-dark); }
.card.hot, .card-dark.hot { border-color: var(--accent); background: var(--ink-2); }
.card-accent { background: var(--accent); border-color: var(--accent); }
.card-accent p, .card-accent .tag { color: var(--ink); }
.tag { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.5px; text-transform: uppercase; color: var(--accent-ink); margin-bottom: 12px; }
.dark .tag { color: var(--accent); }
.dark .card-accent .tag { color: var(--ink); }
.tag-blue { color: var(--blue); }

.band { margin-top: 20px; background: var(--ink); color: var(--paper); border-radius: var(--radius); padding: 24px 28px; }
.band p { color: var(--paper); }

/* statement */
.statement { background: var(--accent); color: var(--ink); padding: 112px 0; }
.statement .eyebrow { color: var(--ink); }
.statement-big { font-family: var(--font-head); font-weight: 700; font-size: clamp(36px, 6vw, 76px); line-height: 1.05; letter-spacing: -1.5px; max-width: 1000px; }
.statement-sub { font-size: clamp(18px, 2.2vw, 24px); margin-top: 28px; max-width: 820px; }

/* flow */
.flow { list-style: none; padding: 0; margin: 0 0 24px; display: grid; grid-template-columns: repeat(5, 1fr); gap: 28px; }
.flow li { border: 1.5px solid var(--ink-line); border-radius: var(--radius); padding: 22px; position: relative; }
.flow li:not(:last-child)::after { content: '→'; position: absolute; right: -22px; top: 50%; transform: translateY(-50%); color: var(--accent); font-weight: 700; }
.flow h3 { font-size: 20px; margin-bottom: 8px; }
.flow p { font-size: 15px; color: var(--text-soft-dark); }
.flow li.hot { border-color: var(--accent); background: var(--ink-2); }
.flow li.end { background: var(--accent); border-color: var(--accent); }
.flow li.end h3, .flow li.end p { color: var(--ink); }
.note { background: var(--ink-2); border-radius: var(--radius); padding: 20px 24px; }

/* split */
.split { display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: start; }
.split h2 { margin-bottom: 32px; }
.points { list-style: none; padding: 0; margin: 0; display: grid; gap: 20px; font-size: 19px; }
.points li { color: var(--text-soft); }
.points strong { color: var(--ink); }
.side h3 { margin-bottom: 18px; }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 10px 20px; margin: 0 0 20px; }
.kv dt { font-weight: 600; }
.kv dd { margin: 0; color: var(--text-soft); }

/* evidence rows */
.rows { margin: 0; border-top: 1px solid var(--line); }
.rows div { display: grid; grid-template-columns: 220px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.rows dt { font-weight: 600; }
.rows dd { margin: 0; color: var(--text-soft); }
.callout { margin-top: 32px; font-size: 19px; color: var(--text-soft); }
.callout strong { color: var(--ink); }

/* QA decisions */
.sub-h { font-size: 28px; margin: 64px 0 24px; }
.decisions { list-style: none; padding: 0; margin: 0 0 20px; display: grid; gap: 14px; }
.decisions li { display: grid; grid-template-columns: minmax(220px, 360px) 1fr; gap: 28px; align-items: center; }
.cond { border: 1.5px solid var(--line); background: var(--card); border-radius: 12px; padding: 14px 18px; font-weight: 600; position: relative; }
.cond::after { content: '→'; position: absolute; right: -22px; color: var(--accent-ink); }
.cond-hot { border-color: var(--accent-ink); }
.cond-end { background: var(--accent); border-color: var(--accent); }
.out { color: var(--text-soft); }
.out strong { color: var(--ink); }

/* steps */
.steps { list-style: none; padding: 0; margin: 0; }
.num { display: block; font-family: var(--font-head); font-weight: 700; font-size: 48px; line-height: 1; color: var(--accent-ink); margin-bottom: 16px; }
.quote { font-family: var(--font-head); font-size: clamp(22px, 3vw, 32px); font-weight: 500; margin-top: 48px; }

/* table */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); }
.compare { width: 100%; border-collapse: collapse; min-width: 720px; }
.compare th, .compare td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--line); vertical-align: top; }
.compare tr:last-child th, .compare tr:last-child td { border-bottom: 0; }
.compare thead th { font-size: 14px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); }
.compare td { color: var(--text-soft); }
.compare .us { color: var(--ink); font-weight: 600; background: rgba(232, 131, 58, 0.10); }
.compare thead .us { color: var(--accent-ink); }

/* proof */
.proof { background: radial-gradient(circle at 85% 70%, #1F3A4F 0%, var(--ink) 55%); }
.display { font-size: clamp(44px, 7vw, 92px) !important; font-weight: 700 !important; letter-spacing: -2px !important; margin-bottom: 24px !important; }

/* footer */
.footer { background: var(--ink); color: var(--paper); border-top: 1px solid var(--ink-line); padding: 32px 0; font-size: 15px; }
.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }
.footer a { color: var(--text-soft-dark); }

/* dialog */
.lead-dialog { border: 0; padding: 0; border-radius: 20px; width: min(560px, calc(100vw - 32px)); background: var(--paper); color: var(--ink); }
.lead-dialog::backdrop { background: rgba(14, 26, 36, 0.7); }
.lead-form { position: relative; padding: 36px; }
.lead-body { display: grid; gap: 16px; }
.lead-body h2 { font-size: 28px; padding-right: 32px; }
.lead-form label { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.lead-form .opt { font-weight: 400; color: var(--muted); }
.lead-form input, .lead-form textarea { font: 400 16px/1.4 var(--font-body); padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--ink); width: 100%; }
.lead-form [aria-invalid="true"] { border-color: #B3261E; }
.lead-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-error { color: #B3261E; font-size: 14px; }
.close { position: absolute; top: 16px; right: 16px; background: none; border: 0; font-size: 28px; line-height: 1; cursor: pointer; color: var(--muted); padding: 4px 8px; }
.lead-form .btn[disabled] { opacity: 0.6; cursor: wait; }

/* responsive */
@media (max-width: 1000px) {
  .grid.four { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: 1fr; gap: 14px; }
  .flow li:not(:last-child)::after { content: '↓'; right: auto; left: 22px; top: auto; bottom: -19px; transform: none; }
  .split { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 760px) {
  .section { padding: 72px 0; }
  .wrap { padding: 0 16px; }
  .grid.two, .grid.three, .grid.four { grid-template-columns: 1fr; }
  .span-2 { grid-column: auto; }
  .rows div { grid-template-columns: 1fr; gap: 4px; }
  .decisions li { grid-template-columns: 1fr; gap: 8px; }
  .cond::after { display: none; }
  .lead-form .row { grid-template-columns: 1fr; }
  .lead-form { padding: 28px 20px; }
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 18px;
    background: var(--ink); padding: 20px 16px 24px; border-bottom: 1px solid var(--ink-line);
  }
  .nav-links.open { display: flex; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
}