:root{
  /* dark (default fallback — used when there's no saved choice and no light system preference) */
  --color-bg:#1c1a18;
  --color-surface:#272321;
  --color-text:#f1ece2;
  --color-neutral-100:#211d1b;
  --color-neutral-300:#3a352f;
  --color-accent-100:#3a1c11;
  --color-accent-700:#ff8a6c;
  --color-accent-800:#ffd2c0;
  --matte:#111010;
  --matte-ink:#f1ece2;
  --ink:#0a0908;
  color-scheme:dark;

  --color-accent:#ec3013;
  --color-divider:color-mix(in srgb,var(--color-text) 40%,transparent);
  --paper:#f4efe4;
  --font-heading:"Besley","Georgia",serif;
  --font-body:"Archivo",system-ui,sans-serif;
  --pad-x:clamp(20px,4.5vw,56px);
  --fs-hero:clamp(38px,7.5vw,76px);
  --fs-h-lg:clamp(30px,5vw,44px);
  --fs-h-md:clamp(24px,4vw,36px);
  --fs-cta:clamp(34px,7vw,60px);
  --fs-stat:clamp(28px,4vw,44px);
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --color-bg:#f6f1e6;
    --color-surface:#ece3d0;
    --color-text:#201e1d;
    --color-neutral-100:#f2ead9;
    --color-neutral-300:#ddd2b8;
    --color-accent-100:#fbe6da;
    --color-accent-700:#ae1800;
    --color-accent-800:#7c1405;
    --matte:#d6c7a1;
    --matte-ink:#201e1d;
    --ink:#201e1d;
    color-scheme:light;
  }
}
:root[data-theme="light"]{
  --color-bg:#f6f1e6;
  --color-surface:#ece3d0;
  --color-text:#201e1d;
  --color-neutral-100:#f2ead9;
  --color-neutral-300:#ddd2b8;
  --color-accent-100:#fbe6da;
  --color-accent-700:#ae1800;
  --color-accent-800:#7c1405;
  --matte:#d6c7a1;
  --matte-ink:#201e1d;
  --ink:#201e1d;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --color-bg:#1c1a18;
  --color-surface:#272321;
  --color-text:#f1ece2;
  --color-neutral-100:#211d1b;
  --color-neutral-300:#3a352f;
  --color-accent-100:#3a1c11;
  --color-accent-700:#ff8a6c;
  --color-accent-800:#ffd2c0;
  --matte:#111010;
  --matte-ink:#f1ece2;
  --ink:#0a0908;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
html{scroll-behavior:smooth}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);text-wrap:pretty;-webkit-font-smoothing:antialiased;transition:background-color .35s ease,color .35s ease}
a{color:var(--color-accent-700)}
a:hover{color:var(--color-accent)}
img,svg{display:block;max-width:100%}
::selection{background:color-mix(in srgb,var(--color-accent) 30%,transparent)}

.page{max-width:1800px;margin:0 auto;background:var(--color-bg);color:var(--color-text);transition:background-color .35s ease,color .35s ease}

hr.div{height:2px;border:0;margin:0;background:var(--color-divider);transition:background-color .35s ease}

/* hero */
.hero{padding:clamp(56px,9vw,104px) var(--pad-x) clamp(48px,7vw,88px)}
.hero-eyebrow{font:13px/14px var(--font-body);font-weight:400;letter-spacing:.08em;text-transform:uppercase;color:var(--color-accent-700);margin:0 0 22px}
.hero-quote{font-family:var(--font-heading);font-weight:800;font-size:var(--fs-hero);line-height:1.06;letter-spacing:-.025em;margin:0 0 0 -.058em;max-width:19ch}
.hero-intro{font:19px/30px var(--font-body);max-width:58ch;margin:38px 0 0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}

/* section rows */
.row{display:grid;grid-template-columns:160px minmax(0,1fr);gap:0}
.rail{border-right:2px solid var(--color-divider);padding:64px 0 64px var(--pad-x);transition:border-color .35s ease}
.rail p{font:12px/16px ui-monospace,Menlo,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent);margin:0}
.content{padding:64px var(--pad-x)}
h2{font-family:var(--font-heading);font-weight:800;letter-spacing:-.02em;margin:0 0 24px}
.h-lg{font-size:var(--fs-h-lg);line-height:1.14}
.h-md{font-size:var(--fs-h-md);line-height:1.17}
.lede{font:18px/29px var(--font-body);max-width:74ch;margin:0 0 20px}
.body-p{font:16px/27px var(--font-body);color:color-mix(in srgb,var(--color-text) 78%,transparent);max-width:74ch;margin:0 0 20px}
.handoff{font:15px/24px var(--font-body);color:var(--color-accent-700);margin:32px 0 0;padding-top:20px;border-top:2px solid var(--color-divider);max-width:74ch}
.source-note{font:13px/20px var(--font-body);color:color-mix(in srgb,var(--color-text) 55%,transparent);margin:20px 0 0;max-width:74ch}

/* 02 stats */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0 40px;padding-top:32px;border-top:2px solid var(--color-divider)}
.stat-num{font-family:var(--font-heading);font-weight:800;font-size:var(--fs-stat);line-height:1.18;color:var(--color-accent);margin:0 0 0 -.045em}
.stat-label{font:14px/21px var(--font-body);color:color-mix(in srgb,var(--color-text) 74%,transparent);margin:12px 0 0}

/* 03 compare */
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px;font:15px/22px var(--font-body)}
.compare-row{display:grid;grid-template-columns:1fr 1.2fr;gap:20px;padding:12px 0;border-bottom:1px solid var(--color-neutral-300)}
.compare-row:last-child{border-bottom:0}
.compare-row span:first-child{font-weight:700}
.compare-row span:last-child{color:color-mix(in srgb,var(--color-text) 72%,transparent)}

/* 04 blind spots */
.blind-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:2px;background:var(--color-divider);border:2px solid var(--color-divider);border-radius:16px;overflow:hidden}
.blind-cell{background:var(--color-bg);padding:24px 18px;transition:background .2s ease}
.blind-cell:hover{background:var(--color-accent-100)}
.blind-cell h3{font-family:var(--font-heading);font-weight:800;font-size:17px;line-height:23px;margin:0 0 8px}
.blind-cell p{font:14px/21px var(--font-body);color:color-mix(in srgb,var(--color-text) 76%,transparent);margin:0}

/* 05 claims */
.claims-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0 40px}
.claim{border-top:2px solid var(--color-divider);padding:22px 0}
.claim.is-accent{border-top-color:var(--color-accent)}
.claim .num{font:12px/20px ui-monospace,Menlo,monospace;color:var(--color-accent);margin:0 0 10px}
.claim h3{font-family:var(--font-heading);font-weight:800;font-size:19px;line-height:25px;margin:0 0 8px}
.claim p{font:14px/22px var(--font-body);color:color-mix(in srgb,var(--color-text) 76%,transparent);margin:0}

/* 06 steps */
.step{display:grid;grid-template-columns:96px minmax(0,1fr);gap:0 48px;align-items:start;padding:24px 0;border-top:2px solid var(--color-divider)}
.step:last-of-type{border-bottom:2px solid var(--color-divider)}
.step .tag-step{grid-column:1;font-family:var(--font-heading);font-weight:800;font-size:14px;line-height:26px;margin:0}
.step h3{grid-column:2;font-family:var(--font-heading);font-weight:800;font-size:22px;line-height:28px;margin:0}
.step p{grid-column:2;font:15px/25px var(--font-body);color:color-mix(in srgb,var(--color-text) 78%,transparent);margin:0}
.step .field-key{grid-column:2;font:12px/20px ui-monospace,Menlo,monospace;color:var(--color-accent-700);margin:8px 0 0}

/* 07 output */
.output-wrap{padding:64px var(--pad-x);display:grid;grid-template-columns:minmax(0,1fr) 440px;gap:56px;align-items:start}
.checklist{display:grid;grid-template-columns:1fr 1fr;gap:12px 40px;font:14.5px/22px var(--font-body)}
.check-item{display:flex;gap:12px;padding-bottom:11px;border-bottom:1px solid var(--color-neutral-300)}
.check-item span:first-child{font-family:ui-monospace,Menlo,monospace;font-size:11px;color:var(--color-accent);padding-top:4px}
.packet{border:2px solid var(--color-text);border-radius:16px;overflow:hidden;background:var(--color-neutral-100);transition:transform .3s ease,box-shadow .3s ease}
.packet:hover{transform:translateY(-4px);box-shadow:0 16px 32px rgba(0,0,0,.15)}
.packet-head{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;border-bottom:2px solid var(--ink);background:var(--ink);color:var(--paper);font:11px/14px ui-monospace,Menlo,monospace;letter-spacing:.1em;text-transform:uppercase}
.packet-body{padding:18px;font:12px/18px ui-monospace,Menlo,monospace}
.packet-row{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid var(--color-neutral-300)}
.packet-row:last-child{border-bottom:0}
.packet-row span:first-child{color:color-mix(in srgb,var(--color-text) 60%,transparent)}
.packet-row .ok{color:var(--color-accent-700);font-weight:600}
.packet-foot{border-top:2px solid var(--color-text);background:var(--color-accent);color:var(--paper);padding:18px;display:flex;justify-content:space-between;align-items:baseline}
.packet-foot .verified{font-family:var(--font-heading);font-weight:800;font-size:24px;line-height:28px}
.packet-foot .meta{font:11px/14px ui-monospace,Menlo,monospace;letter-spacing:.08em;text-transform:uppercase}
.output-note{grid-column:2;padding:0 var(--pad-x) 56px}

/* 08 changes */
.changes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--color-divider);border:2px solid var(--color-divider);border-radius:16px;overflow:hidden}
.change-cell{background:var(--color-bg);padding:30px 26px}
.change-cell .kicker{font:12px/16px ui-monospace,Menlo,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent-700);margin:0 0 16px}
.change-cell h3{font-family:var(--font-heading);font-weight:800;font-size:24px;line-height:30px;margin:0 0 14px}
.change-cell p{font:15px/24px var(--font-body);color:color-mix(in srgb,var(--color-text) 78%,transparent);margin:0 0 16px}

/* 09 table */
.table{width:100%;border-collapse:collapse;font:15px/22px var(--font-body)}
.table th{text-align:left;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:color-mix(in srgb,var(--color-text) 60%,transparent);padding:10px;border-bottom:2px solid var(--color-divider)}
.table td{padding:14px 10px;border-bottom:1px solid var(--color-divider)}
.table tbody tr{transition:background .15s ease}
.table tbody tr:hover{background:color-mix(in srgb,var(--color-text) 4%,transparent)}
.tag{display:inline-flex;align-items:center;font-size:11px;letter-spacing:.02em;padding:3px 10px;border-radius:999px;background:var(--color-accent-100);color:var(--color-accent-800);margin-left:8px}

/* 10 diagram */
.sits-wrap{padding:64px var(--pad-x);display:grid;grid-template-columns:minmax(0,1fr) 420px;gap:56px;align-items:center}
.note-dim{font:15px/24px var(--font-body);color:color-mix(in srgb,var(--color-text) 65%,transparent);margin:0}
.diagram{border:2px solid var(--color-text);border-radius:16px;overflow:hidden;padding:22px}
.diagram-box{background:var(--color-surface);border-radius:12px;padding:16px 18px;margin-bottom:12px}
.diagram-box.mid{border:2px solid var(--color-accent);background:transparent}
.diagram-box.end{background:var(--ink);color:var(--paper)}
.diagram-box p:first-child{font-family:var(--font-heading);font-weight:800;font-size:16px;margin:0 0 4px}
.diagram-box p:last-child{font:13px/20px var(--font-body);color:color-mix(in srgb,var(--color-text) 70%,transparent);margin:0}
.diagram-box.end p:last-child{color:color-mix(in srgb,var(--paper) 75%,transparent)}
.diagram-arrow{display:flex;justify-content:center;color:var(--color-accent);font-size:20px;line-height:1;margin-bottom:12px}

/* 11 limits */
.limit-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:0 40px;padding:20px 0;border-top:2px solid var(--color-divider)}
.limit-row:last-child{border-bottom:2px solid var(--color-divider)}
.limit-row h3{font-family:var(--font-heading);font-weight:800;font-size:18px;line-height:25px;margin:0}
.limit-row p{font:15px/24px var(--font-body);color:color-mix(in srgb,var(--color-text) 78%,transparent);margin:0}

/* 12 roadmap */
.roadmap{display:flex;align-items:stretch;border:2px solid var(--color-text);border-radius:16px;overflow:hidden}
.rm-cell{flex:1;padding:24px 20px;border-right:2px solid var(--color-divider)}
.rm-cell:last-child{border-right:0;flex:1.2;background:var(--color-accent);color:var(--paper)}
.rm-cell.done{background:var(--color-accent-100)}
.rm-cell .kicker{font:11px/14px ui-monospace,Menlo,monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--color-accent-700);margin:0 0 12px}
.rm-cell:last-child .kicker{color:var(--paper)}
.rm-cell:not(.done):not(:last-child) .kicker{color:color-mix(in srgb,var(--color-text) 60%,transparent)}
.rm-cell h3{font-family:var(--font-heading);font-weight:800;font-size:19px;line-height:25px;margin:0 0 8px}
.rm-cell p{font:13.5px/21px var(--font-body);color:color-mix(in srgb,var(--color-text) 76%,transparent);margin:0}
.rm-cell:last-child p{color:color-mix(in srgb,var(--paper) 88%,transparent)}
.support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px;margin-top:36px;padding-top:32px;border-top:2px solid var(--color-divider)}
.support-grid h3{font:12px/16px var(--font-body);letter-spacing:.08em;text-transform:uppercase;color:var(--color-accent-700);margin:0 0 10px}
.support-grid p{font:14.5px/23px var(--font-body);color:color-mix(in srgb,var(--color-text) 80%,transparent);margin:0}

/* 13 faq */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 56px}
.faq details{border-top:2px solid var(--color-divider)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:24px;align-items:baseline;padding:20px 0;font-family:var(--font-heading);font-weight:700;font-size:19px;line-height:28px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-weight:400;font-size:22px;color:var(--color-accent);flex:none}
.faq details[open] summary::after{content:"\2013"}
.faq p{margin:0 0 22px;font-size:15.5px;line-height:26px;max-width:62ch;color:color-mix(in srgb,var(--color-text) 78%,transparent)}

/* cta band */
.cta{background:var(--color-accent);color:var(--paper);padding:clamp(48px,8vw,84px) var(--pad-x);display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:64px;align-items:end}
.cta h2{font-family:var(--font-heading);font-weight:800;font-size:var(--fs-cta);line-height:1.07;letter-spacing:-.02em;margin:0 0 0 -.058em}
.cta h2 span{display:block}
.cta p{font:18px/28px var(--font-body);max-width:50ch;margin:28px 0 0}
.cta-copy a{color:var(--paper);text-decoration:underline;text-underline-offset:3px}
.cta .btn-ghost{color:var(--paper);border-color:var(--paper)}

.site-footer{padding:40px var(--pad-x);font:13px/22px var(--font-body);color:color-mix(in srgb,var(--color-text) 65%,transparent);display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}

@media (max-width:900px){
  .row{grid-template-columns:1fr}
  .rail{border-right:0;border-bottom:2px solid var(--color-divider);padding:28px var(--pad-x) 16px;display:flex;gap:8px}
  .rail p{display:flex;gap:6px}
  .rail p br{display:none}
  .stat-grid,.claims-grid{grid-template-columns:1fr 1fr}
  .blind-grid{grid-template-columns:1fr 1fr}
  .compare-grid,.faq-grid{grid-template-columns:1fr}
  .step{grid-template-columns:1fr;gap:6px;padding:20px 0}
  .step > *{grid-column:auto}
  .step .field-key{order:99}
  .output-wrap,.sits-wrap{grid-template-columns:1fr}
  .output-note{grid-column:1;padding:0 var(--pad-x) 40px}
  .changes-grid{grid-template-columns:1fr}
  .roadmap{flex-direction:column}
  .rm-cell{border-right:0;border-bottom:2px solid var(--color-divider)}
  .rm-cell:last-child{border-bottom:0}
  .support-grid{grid-template-columns:1fr;gap:24px}
  .cta{grid-template-columns:1fr}
  .table{font-size:13px}
  .table th:nth-child(3),.table td:nth-child(3){display:none}
}