@font-face {
  font-family: "Instrument Serif";
  src: url("/assets/fonts/instrument-serif.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("/assets/fonts/instrument-serif-italic.woff2") format("woff2");
  font-weight: 400; font-style: italic; font-display: swap;
}

:root {
  --paper: #F3F0E8;
  --card: #FBFAF6;
  --ink: #15171C;
  --muted: #5C606B;
  --line: rgba(21, 23, 28, .13);
  --grid: rgba(21, 23, 28, .07);
  --accent: #C03E19;
  --live: #1E7A4C;
  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0E1013;
    --card: #15181D;
    --ink: #ECE9E1;
    --muted: #9B9EA7;
    --line: rgba(236, 233, 225, .14);
    --grid: rgba(236, 233, 225, .06);
    --accent: #FF6B3D;
    --live: #4CC38A;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--paper) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 650; letter-spacing: -.01em; }
.mark { width: 28px; height: 28px; color: var(--ink); }
.mark-tip { fill: var(--accent); }
nav { display: flex; gap: 24px; }
nav a { text-decoration: none; color: var(--muted); font-size: 15px; }
nav a:hover { color: var(--ink); }

/* type */
.label { font: 12.5px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 22px; }
h1 { font: 400 clamp(46px, 6.6vw, 84px)/1 var(--serif); letter-spacing: -.02em; margin: 0 0 22px; }
h1 em { color: var(--accent); }
h2 { font: 400 clamp(36px, 4.4vw, 52px)/1.05 var(--serif); margin: 0; letter-spacing: -.01em; }
h3 { font-size: 20px; line-height: 1.25; margin: 0; letter-spacing: -.01em; }
.lede { font-size: 19px; color: var(--muted); max-width: 34ch; margin: 0 0 30px; }

/* buttons */
.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 600; font-size: 15.5px; text-decoration: none; border: 1px solid var(--ink); transition: transform .15s ease; }
.btn:hover { transform: translateY(-1px); }
.btn-ink { background: var(--ink); color: var(--paper); }
.btn-line { color: var(--ink); background: transparent; }

/* hero */
.hero { padding: 72px 0 40px; background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 40px 40px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
.stairs { margin: 0; }
.stairs svg { width: 100%; height: auto; overflow: visible; }
.stairs .grid path { stroke: var(--line); stroke-dasharray: 3 6; fill: none; }
.step-line { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linejoin: round; stroke-dasharray: 900; stroke-dashoffset: 900; animation: draw 1.4s .2s cubic-bezier(.6, 0, .2, 1) forwards; }
.north-stem { stroke: var(--accent); stroke-width: 3; fill: none; }
.north-tip { fill: var(--accent); }
.north-n { font: 600 18px var(--mono); fill: var(--accent); }
.north { opacity: 0; animation: rise .6s 1.5s ease-out forwards; }
.step-tag { opacity: 0; animation: rise .5s var(--d) ease-out forwards; }
.step-tag circle { fill: var(--paper); stroke: var(--ink); stroke-width: 3; }
.step-tag .t-num { font: 12px var(--mono); fill: var(--muted); letter-spacing: .08em; }
.step-tag .t-name { font: 600 16px var(--sans); fill: var(--ink); }
.step-tag .t-live { font: 600 12px var(--mono); fill: var(--live); letter-spacing: .04em; }
.step-tag.is-soon .t-name { fill: var(--muted); font-weight: 500; }
.step-tag.is-soon circle { stroke: var(--muted); stroke-dasharray: 3 3; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .step-line { animation: none; stroke-dashoffset: 0; }
  .north, .step-tag { animation: none; opacity: 1; }
  html { scroll-behavior: auto; }
}

/* sections */
.section { padding: 88px 0; border-bottom: 1px solid var(--line); }
.section-head { display: flex; align-items: baseline; gap: 18px; margin-bottom: 40px; }
.num { font: 13px var(--mono); color: var(--accent); letter-spacing: .08em; border: 1px solid currentColor; border-radius: 999px; padding: 3px 10px; }

/* product */
.product { display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 28px; padding: 44px; }
.product-id { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.app-icon { border-radius: 16px; width: 64px; height: 64px; }
.product-kind { margin: 4px 0 0; color: var(--muted); font-size: 15px; }
.product-copy > p { margin: 0 0 24px; max-width: 52ch; }
.facts { list-style: none; padding: 0; margin: 0 0 28px; border-top: 1px solid var(--line); }
.facts li { display: grid; grid-template-columns: 110px 1fr; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; }
.facts span { font: 12px/2 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.live { color: var(--live); font-weight: 650; }
.product-shot { display: flex; justify-content: center; }
.product-shot img { width: 100%; max-width: 280px; border-radius: 26px; box-shadow: 0 24px 60px rgba(0, 0, 0, .16); }
.more { margin: 28px 0 0; color: var(--muted); font-size: 15.5px; }

/* status labels */
.status { display: inline-flex; align-items: center; gap: 7px; font: 12px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.status-live { color: var(--live); }
.status-soon { color: var(--muted); }

/* compact product cards: every product after the flagship */
.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 20px; }
.product-card { display: flex; flex-direction: column; gap: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 28px; }
.product-card .product-id { margin-bottom: 0; }
.product-card .app-icon { width: 52px; height: 52px; border-radius: 13px; }
.product-card h3 { font-size: 19px; }
.product-card p { margin: 0; color: var(--muted); font-size: 15.5px; }
.product-card .links { margin-top: auto; padding-top: 6px; display: flex; flex-wrap: wrap; gap: 18px; font-size: 15px; font-weight: 600; }
.product-card .links a { text-underline-offset: 4px; }

/* principles */
.principles { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.principles li { padding: 26px 24px 8px 0; border-right: 1px solid var(--line); }
.principles li + li { padding-left: 24px; }
.principles li:last-child { border-right: 0; }
.p-num { display: block; font: 12px var(--mono); color: var(--muted); letter-spacing: .08em; margin-bottom: 36px; }
.principles h3 { margin-bottom: 10px; }
.principles p { margin: 0; color: var(--muted); font-size: 15.5px; }

/* contact */
.contact-line { font: 400 clamp(26px, 3.2vw, 38px)/1.25 var(--serif); margin: 0; max-width: 30ch; }
.contact-line a { color: var(--accent); text-underline-offset: 5px; }
.contact-sub { margin: 22px 0 0; color: var(--muted); font-size: 15.5px; }
.contact-sub a { color: var(--ink); text-underline-offset: 3px; }

/* footer */
.foot { padding: 40px 0 56px; }
.foot-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.brand-sm { font-size: 15px; }
.brand-sm .mark { width: 22px; height: 22px; }
.foot-note { margin: 0; font: 12px var(--mono); color: var(--muted); letter-spacing: .04em; }
.legal { margin: 0 0 6px; color: var(--muted); font-size: 13px; max-width: 80ch; }

/* small screens */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .stairs { max-width: 520px; }
  .product { grid-template-columns: 1fr; padding: 28px; }
  .product-shot { order: -1; }
  .product-shot img { max-width: 220px; }
  .product-grid { grid-template-columns: 1fr; }
  .principles { grid-template-columns: 1fr 1fr; }
  .principles li { border-right: 0; border-bottom: 1px solid var(--line); padding: 22px 16px 22px 0; }
  .principles li + li { padding-left: 0; }
  .principles li:nth-child(odd) { border-right: 1px solid var(--line); }
  .principles li:nth-child(even) { padding-left: 16px; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  nav { gap: 16px; }
  nav a[href="#how"] { display: none; }
  .hero { padding-top: 48px; }
  .section { padding: 64px 0; }
  .principles { grid-template-columns: 1fr; }
  .principles li:nth-child(odd) { border-right: 0; }
  .principles li:nth-child(even) { padding-left: 0; }
  .p-num { margin-bottom: 14px; }
  .facts li { grid-template-columns: 1fr; gap: 0; }
  .product { padding: 22px; border-radius: 22px; }
}