/* Layout: a "slab" site. Flat concrete-grey bands stacked like poured sections, one live flake panel as the signature, cobalt as the single signal colour. */
:root {
  --bg: #eef0f1;          /* fresh-ground concrete */
  --slab: #e1e5e7;        /* second pour, for bands */
  --card: #f8f9f9;
  --ink: #15181b;
  --muted: #545c63;
  --line: #c8ced2;
  --accent: #2350b8;      /* cobalt, the one signal colour */
  --accent-ink: #ffffff;
  --accent-soft: #dfe7f8;
  --draft: #fff3c4;
  --draft-ink: #5a4500;
  --f-display: "Big Shoulders Display", "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  --f-body: "Public Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  --f-data: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --s1: 0.875rem; --s2: 1rem; --s3: 1.125rem; --s4: 1.5rem; --s5: 2.25rem; --s6: clamp(2.6rem, 7vw, 4.6rem);
  --wrap: 72rem;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121416; --slab: #1a1d20; --card: #1f2326; --ink: #eceef0; --muted: #9ba3aa; --line: #2e3337;
    --accent: #7fa2ff; --accent-ink: #0d1530; --accent-soft: #1d2945; --draft: #3a3112; --draft-ink: #f2dc8e;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121416; --slab: #1a1d20; --card: #1f2326; --ink: #eceef0; --muted: #9ba3aa; --line: #2e3337;
  --accent: #7fa2ff; --accent-ink: #0d1530; --accent-soft: #1d2945; --draft: #3a3112; --draft-ink: #f2dc8e;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { background: var(--bg); color: var(--ink); font-family: var(--f-body); font-size: var(--s2); line-height: 1.6; }
h1, h2, h3 { font-family: var(--f-display); font-weight: 800; line-height: 1.02; letter-spacing: 0.005em; text-wrap: balance; margin: 0; }
h1 { font-size: var(--s6); text-transform: uppercase; }
h2 { font-size: clamp(1.9rem, 4.5vw, 2.8rem); text-transform: uppercase; }
h3 { font-size: var(--s4); text-transform: uppercase; }
p { margin: 0; max-width: 65ch; }
a { color: var(--accent); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.band { padding-block: clamp(2.5rem, 6vw, 4.5rem); border-top: 1px solid var(--line); }
.band.alt { background: var(--slab); }
.stack { display: grid; gap: 1rem; }
.eyebrow { font-family: var(--f-data); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: var(--s3); color: var(--muted); }

/* draft strip */
.draft { background: var(--draft); color: var(--draft-ink); font-size: 0.8rem; }
.draft .wrap { padding-block: 0.4rem; }

/* header */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 0.7rem; }
.brand { font-family: var(--f-display); font-weight: 900; font-size: 1.45rem; text-transform: uppercase; color: var(--ink); text-decoration: none; letter-spacing: 0.02em; }
.brand span { color: var(--accent); }
.nav { display: flex; gap: 1.1rem; flex-wrap: wrap; align-items: center; font-size: var(--s1); }
.nav a { color: var(--ink); text-decoration: none; }
.nav a:hover { color: var(--accent); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 4px; padding: 0.75rem 1.2rem; font-family: var(--f-body); font-weight: 700; font-size: var(--s2); text-decoration: none; cursor: pointer; }
.btn:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--ink); }
.nav .btn { padding: 0.5rem 0.9rem; font-size: var(--s1); color: var(--accent-ink); }

/* hero */
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; padding-block: clamp(2rem, 5vw, 4rem); }
.hero-copy { display: grid; gap: 1.2rem; min-width: 0; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.specs { display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem; font-family: var(--f-data); font-size: 0.82rem; color: var(--muted); }
.specs b { color: var(--ink); font-weight: 600; }

/* flake panel */
.panel { display: grid; gap: 0.75rem; min-width: 0; }
.panel canvas { width: 100%; max-width: 100%; aspect-ratio: 4 / 3; display: block; border-radius: 6px; border: 1px solid var(--line); }
.blends { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.blend { display: inline-flex; align-items: center; gap: 0.45rem; background: var(--card); color: var(--ink); border: 1.5px solid var(--line); border-radius: 999px; padding: 0.35rem 0.8rem 0.35rem 0.4rem; font-size: var(--s1); cursor: pointer; font-family: var(--f-body); }
.blend i { width: 1.1rem; height: 1.1rem; border-radius: 50%; display: block; border: 1px solid var(--line); }
.blend[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.caption { font-size: 0.78rem; color: var(--muted); }

/* offer */
.offer { background: var(--accent); color: var(--accent-ink); }
.offer .wrap { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; flex-wrap: wrap; padding-block: 1.6rem; }
.offer h2 { font-size: clamp(1.6rem, 3.6vw, 2.2rem); }
.offer p { opacity: 0.92; }
.offer .btn { background: var(--accent-ink); color: var(--accent); }

/* process: a real sequence, so numbered */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; background: var(--card); }
.steps li { padding: 1.2rem 1rem 1.3rem; border-right: 1px solid var(--line); display: grid; gap: 0.5rem; align-content: start; min-width: 0; }
.steps li:last-child { border-right: 0; }
.steps .n { font-family: var(--f-data); font-size: 0.78rem; color: var(--accent); }
.steps h3 { font-size: 1.25rem; }
.steps p { font-size: var(--s1); color: var(--muted); }

/* two column text */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.split > * { min-width: 0; }
.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.ticks li { padding-left: 1.4rem; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 0.6rem; height: 0.6rem; background: var(--accent); transform: rotate(45deg); border-radius: 1px; }

/* estimator */
.est { background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 1.4rem; display: grid; gap: 1rem; }
.est .row { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.est label { font-size: var(--s1); font-weight: 600; display: grid; gap: 0.3rem; }
.est input, .est select, .form input, .form select, .form textarea { font: inherit; color: var(--ink); background: var(--bg); border: 1.5px solid var(--line); border-radius: 4px; padding: 0.6rem 0.7rem; width: 100%; }
.size-btn { font-family: var(--f-body); background: var(--bg); color: var(--ink); border: 1.5px solid var(--line); border-radius: 4px; padding: 0.5rem 0.8rem; cursor: pointer; font-size: var(--s1); }
.size-btn[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); font-weight: 700; }
.result { font-family: var(--f-display); font-size: clamp(2rem, 6vw, 3rem); font-weight: 800; font-variant-numeric: tabular-nums; }
.note { font-size: 0.8rem; color: var(--muted); }

/* tables */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: var(--card); }
table { border-collapse: collapse; width: 100%; min-width: 40rem; font-size: var(--s1); }
th, td { text-align: left; padding: 0.75rem 0.9rem; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { font-family: var(--f-data); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); font-weight: 600; background: var(--slab); }
tbody th { font-weight: 700; }
td.num { font-family: var(--f-data); font-variant-numeric: tabular-nums; white-space: nowrap; }
tr.us { background: var(--accent-soft); }
tr:last-child td, tr:last-child th { border-bottom: 0; }

/* areas */
.areas { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1rem; }
.areas div { display: grid; gap: 0.3rem; min-width: 0; }
.areas h3 { font-size: 1.15rem; }
.areas p { font-size: var(--s1); color: var(--muted); }

/* faq */
.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding-block: 0.9rem; }
.faq summary { cursor: pointer; font-weight: 700; font-size: var(--s3); list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--f-data); color: var(--accent); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 0.6rem; color: var(--muted); }

/* quote form */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.form label { display: grid; gap: 0.3rem; font-size: var(--s1); font-weight: 600; min-width: 0; }
.form .full { grid-column: 1 / -1; }
.form-done { background: var(--accent-soft); border-radius: 6px; padding: 1rem; }

/* article pages */
.article .wrap { display: grid; gap: 1.4rem; }
.article h2 { font-size: clamp(1.6rem, 3.6vw, 2.2rem); margin-top: 0.8rem; }
.crumbs { font-size: var(--s1); color: var(--muted); }
.crumbs a { color: var(--muted); }

/* services row */
.svc { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.svc a { display: grid; gap: 0.5rem; align-content: start; background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 1.2rem; color: var(--ink); text-decoration: none; min-width: 0; }
.svc a:hover { border-color: var(--accent); }
.svc p { font-size: var(--s1); color: var(--muted); }
.svc span { font-size: var(--s1); font-weight: 700; color: var(--accent); }
.answer { background: var(--accent-soft); border-radius: 6px; padding: 1rem 1.2rem; max-width: 65ch; }
.answer p { color: var(--ink); }
.article ol.plain { margin: 0; padding-left: 1.3rem; display: grid; gap: 0.6rem; max-width: 65ch; }
.foot-links { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; }

footer { border-top: 1px solid var(--line); background: var(--slab); }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; padding-block: 2rem; font-size: var(--s1); color: var(--muted); }
footer a { color: var(--muted); }

@media (max-width: 860px) {
  .hero .wrap, .split { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .steps li { border-right: 0; border-bottom: 1px solid var(--line); }
  .steps li:last-child { border-bottom: 0; }
  .areas { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .svc { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }