/* Alt64 signature theme. Fonts: the site's own Uncut Sans (titles) and Inter (text). */
@font-face { font-family: 'Uncut Sans'; font-weight: 500; font-style: normal; font-display: swap; src: url('../fonts/Uncut-Sans-Medium.woff2') format('woff2'), url('../fonts/Uncut-Sans-Medium.woff') format('woff'); }
@font-face { font-family: 'Uncut Sans'; font-weight: 700; font-style: normal; font-display: swap; src: url('../fonts/Uncut-Sans-Bold.woff2') format('woff2'), url('../fonts/Uncut-Sans-Bold.woff') format('woff'); }
@font-face { font-family: 'Uncut Sans'; font-weight: 700; font-style: italic; font-display: swap; src: url('../fonts/Uncut-Sans-BoldOblique.woff2') format('woff2'), url('../fonts/Uncut-Sans-BoldOblique.woff') format('woff'); }
/* Layout: left-weighted editorial grid on a 12-col frame; the 8×8 "64" grid is the only ornament and recurs as a motif. */
:root {
  --paper: #F1F3F5;
  --panel: #FFFFFF;
  --ink: #0D1726;
  --muted: #56627A;
  --line: #D5DAE3;
  --accent: #2440D8;
  --accent-soft: #E3E8FD;
  --cell: #DCE1EA;
  --display: "Uncut Sans", "Segoe UI", system-ui, sans-serif;
  --body: "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  --gutter-l: max(16px, env(safe-area-inset-left, 0px));
  --gutter-r: max(16px, env(safe-area-inset-right, 0px));
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0A111D; --panel: #111A2A; --ink: #E8ECF3; --muted: #93A0B8;
    --line: #22304A; --accent: #8FA3FF; --accent-soft: #1A2550; --cell: #1A2538;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0A111D; --panel: #111A2A; --ink: #E8ECF3; --muted: #93A0B8;
  --line: #22304A; --accent: #8FA3FF; --accent-soft: #1A2550; --cell: #1A2538;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { background: var(--paper); color: var(--ink); font: 400 17px/1.65 var(--body); -webkit-font-smoothing: antialiased; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--paper); }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.05; letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
p { margin: 0; }
.wrap { max-width: 1180px; margin: 0 auto; padding-left: var(--gutter-l); padding-right: var(--gutter-r); }
.label { font: 600 12px/1.4 var(--body); letter-spacing: 0.09em; text-transform: uppercase; color: var(--muted); }
.label b { color: var(--accent); font-weight: 500; }

/* Header */
header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 14px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 20px/1 var(--display); letter-spacing: -0.02em; }
.brand svg { width: 22px; height: 22px; flex: none; }
nav { display: flex; align-items: center; gap: 22px; font-size: 15px; }
nav a { text-decoration: none; color: var(--muted); }
nav a:hover { color: var(--ink); }
.lang { font: 600 12px/1 var(--body); border: 1px solid var(--line); padding: 6px 8px; border-radius: 3px; color: var(--muted); }
.btn { display: inline-flex; align-items: center; gap: 10px; font: 500 15px/1 var(--body); padding: 13px 18px; border-radius: 3px; text-decoration: none; border: 1px solid var(--ink); transition: transform .15s ease; }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.ghost { color: var(--ink); background: transparent; }
.btn:hover { transform: translateY(-1px); }
.btn .arr { font-family: var(--mono); }
@media (max-width: 760px) { nav .hide-sm { display: none; } nav { gap: 14px; } }

/* Hero */
.hero { padding-block: clamp(48px, 8vw, 104px) clamp(40px, 6vw, 72px); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: clamp(44px, 7.4vw, 92px); margin-top: 18px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { font-size: clamp(18px, 1.6vw, 20px); color: var(--muted); max-width: 34em; margin-top: 24px; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.grid64 { position: relative; width: 100%; max-width: 440px; justify-self: end; }
.grid64 canvas { display: block; width: 100%; height: auto; aspect-ratio: 1; max-width: 100%; }
.grid64 figcaption { display: flex; justify-content: space-between; margin-top: 12px; }
@media (max-width: 860px) { .hero-grid { grid-template-columns: 1fr; } .grid64 { justify-self: start; max-width: 360px; } }

.proof { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); margin-top: clamp(40px, 6vw, 72px); }
.proof div { padding: 20px 20px 0 0; display: grid; gap: 6px; }
.proof div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.proof strong { font: 700 19px/1.25 var(--display); }
.proof span { color: var(--muted); font-size: 15px; }
@media (max-width: 760px) { .proof { grid-template-columns: 1fr; } .proof div + div { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); margin-top: 16px; } }

/* Sections */
section { padding-block: clamp(64px, 9vw, 120px); }
.sec-head { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 24px; align-items: end; margin-bottom: clamp(32px, 5vw, 56px); }
.sec-head h2 { font-size: clamp(32px, 4.4vw, 56px); }
.sec-head p { color: var(--muted); max-width: 36em; }
@media (max-width: 860px) { .sec-head { grid-template-columns: 1fr; } }
.band { background: var(--panel); border-block: 1px solid var(--line); }

/* Expertise */
.duo { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 20px; }
.exp { border: 1px solid var(--line); background: var(--panel); padding: clamp(24px, 3vw, 40px); display: grid; gap: 18px; align-content: start; }
.exp.lead { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.exp.lead .label, .exp.lead p { color: color-mix(in srgb, var(--paper) 72%, var(--ink)); }
.exp.lead .label b { color: var(--accent); }
.exp h3 { font-size: clamp(26px, 2.8vw, 36px); }
.exp ul { list-style: none; margin: 4px 0 0; padding: 0; display: grid; gap: 10px; }
.exp li { display: grid; grid-template-columns: 18px minmax(0, 1fr); gap: 10px; font-size: 16px; }
.exp li::before { content: ""; width: 8px; height: 8px; margin-top: 9px; background: var(--accent); }
.exp.saas { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: end; justify-content: space-between; }
.exp.saas h3 { font-size: 24px; }
@media (max-width: 860px) { .duo { grid-template-columns: 1fr; } }

/* AI path */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 2px solid var(--ink); }
.step { padding: 24px 24px 8px 0; display: grid; gap: 12px; align-content: start; }
.step + .step { padding-left: 24px; border-left: 1px solid var(--line); }
.step .n { font: 600 13px/1 var(--body); color: var(--accent); }
.step h3 { font-size: 24px; }
.step p { color: var(--muted); font-size: 16px; }
.step .out { margin-top: 6px; padding-top: 12px; border-top: 1px dashed var(--line); font-size: 14px; }
.step .out span { display: block; font: 600 11px/1.4 var(--body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; }
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); } .step:nth-child(3) { padding-left: 0; border-left: 0; } .step:nth-child(n+3) { border-top: 1px solid var(--line); margin-top: 16px; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } .step + .step { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); margin-top: 8px; } }
.callout { margin-top: clamp(32px, 4vw, 48px); display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; justify-content: space-between; padding: 22px 24px; background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent); }
.callout p { font-size: 17px; max-width: 46em; }
.callout strong { font-family: var(--display); }
.callout a { font: 500 15px/1 var(--body); color: var(--accent); text-decoration: none; white-space: nowrap; }


/* Product and teams */
.offers { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 2px solid var(--ink); }
.offer { padding: 28px 28px 28px 0; display: grid; gap: 10px; align-content: start; border-bottom: 1px solid var(--line); }
.offer:nth-child(even) { padding-left: 28px; border-left: 1px solid var(--line); }
.offer .q { font: 500 15px/1.4 var(--body); color: var(--accent); }
.offer h3 { font-size: clamp(24px, 2.6vw, 32px); }
.offer p:last-child { color: var(--muted); font-size: 16px; max-width: 34em; }
@media (max-width: 760px) { .offers { grid-template-columns: 1fr; } .offer:nth-child(even) { padding-left: 0; border-left: 0; } .offer { padding-right: 0; } }

/* Blockchain */
.chain-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.cases { display: grid; gap: 0; border-top: 1px solid var(--line); }
.case { display: grid; grid-template-columns: 140px minmax(0, 1fr); gap: 16px; padding-block: 20px; border-bottom: 1px solid var(--line); }
.case h3 { font-size: 20px; }
.case p { color: var(--muted); font-size: 16px; }
@media (max-width: 560px) { .case { grid-template-columns: 1fr; gap: 6px; } }
.ledger { display: grid; gap: 0; font-family: var(--mono); font-size: 13px; }
.block { border: 1px solid var(--line); background: var(--panel); padding: 16px 18px; display: grid; gap: 6px; min-width: 0; }
.block .top { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); }
.block .top b { color: var(--ink); font-weight: 500; }
.block .h { overflow-wrap: anywhere; color: var(--muted); }
.block .h i { font-style: normal; color: var(--accent); }
.link { height: 22px; margin-left: 28px; border-left: 2px dashed var(--accent); }
.ledger .note { margin-top: 12px; color: var(--muted); font-size: 12px; }
@media (max-width: 860px) { .chain-grid { grid-template-columns: 1fr; } }

/* Products */
.products { border-top: 2px solid var(--ink); }
.prod { display: grid; grid-template-columns: minmax(0, 3fr) minmax(0, 5fr) minmax(0, 3fr) 32px; gap: 20px; align-items: baseline; padding-block: 22px; border-bottom: 1px solid var(--line); text-decoration: none; transition: padding .2s ease, background .2s ease; }
.prod:hover { background: var(--panel); padding-inline: 12px; }
.prod h3 { font-size: clamp(22px, 2.4vw, 30px); }
.prod p { color: var(--muted); font-size: 16px; }
.prod .dom { font: 400 13px/1.4 var(--mono); color: var(--muted); overflow-wrap: anywhere; }
.prod .go { font-family: var(--mono); color: var(--accent); text-align: right; }
.prod .tag { font: 600 11px/1 var(--body); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); margin-left: 8px; vertical-align: middle; }
@media (max-width: 760px) { .prod { grid-template-columns: minmax(0, 1fr) 24px; gap: 6px 12px; } .prod p, .prod .dom { grid-column: 1; } .prod .go { grid-row: 1; grid-column: 2; } }

/* Contact */
.contact { background: var(--ink); color: var(--paper); }
.contact .wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(32px, 5vw, 72px); align-items: end; }
.contact h2 { font-size: clamp(36px, 5.4vw, 68px); }
.contact h2 em { font-style: normal; color: var(--accent); }
.contact p.sub { margin-top: 18px; color: color-mix(in srgb, var(--paper) 70%, var(--ink)); max-width: 30em; }
.coords { display: grid; gap: 16px; }
.coord { border-top: 1px solid color-mix(in srgb, var(--paper) 22%, var(--ink)); padding-top: 14px; display: grid; gap: 4px; }
.coord .label { color: color-mix(in srgb, var(--paper) 60%, var(--ink)); }
.coord .val { display: flex; align-items: center; justify-content: space-between; gap: 12px; font: 500 clamp(18px, 2vw, 22px)/1.3 var(--display); user-select: all; overflow-wrap: anywhere; }
.copy { font: 600 12px/1 var(--body); background: transparent; color: var(--paper); border: 1px solid color-mix(in srgb, var(--paper) 35%, var(--ink)); padding: 7px 9px; border-radius: 3px; cursor: pointer; user-select: none; flex: none; }
@media (max-width: 860px) { .contact .wrap { grid-template-columns: 1fr; } }

footer { padding-block: 28px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; font: 400 13px/1.5 var(--body); color: var(--muted); }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* Page reset (the mockup host provided these). */
html { scroll-behavior: smooth; }
body { margin: 0; }
img { max-width: 100%; }
[hidden] { display: none !important; }
.lang-form { margin: 0; }
.lang { background: transparent; cursor: pointer; }
.lang:hover { color: var(--ink); }
.coord .val a { color: inherit; text-decoration: none; }
.coord .val a:hover { text-decoration: underline; }
.step + .step, .step { list-style: none; }
.mt-16 { margin-top: 16px; }
.muted { color: var(--muted); }
.saas-text { color: var(--muted); max-width: 38em; }
.contact .label { color: color-mix(in srgb, var(--paper) 60%, var(--ink)); }
.contact h2 { margin-top: 18px; }
.steps { list-style: none; margin: 0; padding: 0; }
.btn.sm { padding: 10px 14px; font-size: 14px; }