/* Refiner — layout: a drawing-set feel. Plaster ground, ink type, dimension-line rules, one masking-tape highlight. */
:root {
  --bg: #f2f3f0;          /* plaster */
  --surface: #fbfbf9;
  --ink: #1b2220;          /* graphite green-black */
  --muted: #59625e;
  --line: #cfd4cf;
  --accent: #2e6a4f;       /* builder's level green */
  --accent-ink: #f4f7f5;
  --tape: #e9c84a;         /* masking tape */
  --tape-ink: #2a2410;
  --display: "Bricolage Grotesque", "Arial Narrow", system-ui, sans-serif;
  --body: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --s-1: .8125rem; --s0: 1.0625rem; --s1: 1.25rem; --s2: 1.6rem; --s3: 2.2rem; --s4: clamp(2.4rem, 5.4vw, 4.2rem);
  --wrap: 72rem;
  --radius: 4px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121715; --surface: #19201d; --ink: #e6ebe8; --muted: #a2aca7; --line: #2d3733;
    --accent: #7cc19e; --accent-ink: #0f1a14; --tape: #e9c84a; --tape-ink: #2a2410; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121715; --surface: #19201d; --ink: #e6ebe8; --muted: #a2aca7; --line: #2d3733;
  --accent: #7cc19e; --accent-ink: #0f1a14; --tape: #e9c84a; --tape-ink: #2a2410; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--body); font-size: var(--s0); line-height: 1.6; }
img, svg { max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--display); font-weight: 650; line-height: 1.08; letter-spacing: -.015em; text-wrap: balance; margin: 0; }
h1 { font-size: var(--s4); font-variation-settings: "opsz" 96; }
h2 { font-size: var(--s3); }
h3 { font-size: var(--s1); letter-spacing: -.005em; }
p { margin: 0; }
.prose > * + * { margin-top: 1em; }
.prose { max-width: 40rem; }
.prose h2 { margin-top: 2.2rem; }
.prose h3 { margin-top: 1.6rem; }
.prose ul { padding-left: 1.2em; }
.prose li + li { margin-top: .35em; }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--surface); padding: .5rem 1rem; z-index: 50; }

.label { font-family: var(--mono); font-size: var(--s-1); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.dim { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* Header */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--bg); }
.site-header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; gap: 1.5rem; padding-block: .85rem; }
.brand { display: inline-flex; align-items: baseline; gap: .5rem; color: var(--ink); text-decoration: none; font-family: var(--display); font-weight: 700; font-size: 1.45rem; letter-spacing: -.03em; }
.brand-mark { width: 1.6rem; height: 1.6rem; align-self: center; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 1.4rem; }
.nav a { color: var(--ink); text-decoration: none; font-size: .975rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); }
.nav a[aria-current="page"] { text-decoration: underline; }
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .7rem 1.15rem; border-radius: var(--radius); background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; border: 1px solid var(--accent); font-family: var(--body); font-size: 1rem; cursor: pointer; }
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--ink); }
.nav .btn { color: var(--accent-ink); }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: var(--radius); padding: .45rem .7rem; font: 600 .95rem var(--body); }
@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 100%; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: .5rem max(20px, env(safe-area-inset-right, 0px)) 1rem max(20px, env(safe-area-inset-left, 0px)); }
  .nav.open { display: flex; }
  .nav a { padding: .75rem 0; border-top: 1px solid var(--line); }
  .nav .btn { margin-top: .75rem; justify-content: center; }
}

/* Hero */
.hero { padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(2.5rem, 6vw, 4.5rem); border-bottom: 1px solid var(--line); }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero .wrap > * { min-width: 0; }
.hero p.lede { font-size: var(--s1); color: var(--muted); max-width: 34rem; margin-top: 1.25rem; }
.hero .actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.75rem; }
.hero .label { display: block; margin-bottom: 1rem; }
.tape { background: var(--tape); color: var(--tape-ink); padding: 0 .18em; box-decoration-break: clone; -webkit-box-decoration-break: clone; }
.plan { color: var(--ink); }
.plan .wall { fill: none; stroke: currentColor; stroke-width: 6; }
.plan .thin { fill: none; stroke: currentColor; stroke-width: 1.2; }
.plan .fixture { fill: var(--surface); stroke: currentColor; stroke-width: 1.5; }
.plan .new { fill: var(--tape); stroke: var(--tape-ink); stroke-width: 1.5; }
.plan .dimline { stroke: var(--muted); stroke-width: 1; fill: none; }
.plan text { font-family: var(--mono); font-size: 11px; fill: var(--muted); }
.plan text.note { fill: var(--tape-ink); font-weight: 600; }
.plan-caption { margin-top: .75rem; font-size: var(--s-1); color: var(--muted); font-family: var(--mono); }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } }

/* Page header (inner pages) */
.page-head { padding-block: clamp(2.25rem, 6vw, 4rem) clamp(1.75rem, 4vw, 2.75rem); border-bottom: 1px solid var(--line); }
.page-head p.lede { font-size: var(--s1); color: var(--muted); max-width: 40rem; margin-top: 1rem; }
.crumbs { font-size: var(--s-1); color: var(--muted); margin-bottom: 1.25rem; display: flex; flex-wrap: wrap; gap: .4rem; list-style: none; padding: 0; }
.crumbs li + li::before { content: "/"; margin-right: .4rem; color: var(--line); }
.crumbs a { color: var(--muted); }

/* Sections */
.section { padding-block: clamp(2.75rem, 7vw, 5rem); }
.section + .section { border-top: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: 14rem 1fr; gap: 2rem; margin-bottom: 2.25rem; }
.section-head > * { min-width: 0; }
.section-head p { color: var(--muted); max-width: 38rem; margin-top: .75rem; }
@media (max-width: 760px) { .section-head { grid-template-columns: 1fr; gap: .5rem; } }

/* Services grid */
.services { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.service { padding: 1.6rem 1.6rem 1.8rem 0; border-bottom: 1px solid var(--line); display: grid; gap: .6rem; align-content: start; text-decoration: none; color: inherit; }
.service:nth-child(2n) { padding-left: 1.6rem; padding-right: 0; border-left: 1px solid var(--line); }
.service h3 { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.service h3 .arrow { color: var(--accent); font-family: var(--mono); font-size: 1rem; transition: transform .2s; }
.service:hover h3 .arrow { transform: translateX(4px); }
.service p { color: var(--muted); }
.service .dim { font-size: var(--s-1); color: var(--muted); }
@media (max-width: 680px) { .services { grid-template-columns: 1fr; } .service, .service:nth-child(2n) { padding-left: 0; padding-right: 0; border-left: 0; } }

/* Stages — a real sequence */
.stages { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--ink); counter-reset: stage; }
.stages li { padding: 1.4rem 1.4rem 1.6rem 0; border-bottom: 1px solid var(--line); display: grid; gap: .5rem; align-content: start; counter-increment: stage; }
.stages li:not(:nth-child(3n+1)) { padding-left: 1.4rem; border-left: 1px solid var(--line); }
.stages li::before { content: "Stage " counter(stage); font-family: var(--mono); font-size: var(--s-1); letter-spacing: .06em; text-transform: uppercase; color: var(--accent); }
.stages p { color: var(--muted); }
@media (max-width: 860px) { .stages { grid-template-columns: 1fr; } .stages li, .stages li:not(:nth-child(3n+1)) { padding-left: 0; padding-right: 0; border-left: 0; } }

/* Compare table */
.table-wrap { overflow-x: auto; border-top: 1px solid var(--ink); }
table { border-collapse: collapse; width: 100%; min-width: 34rem; font-size: .975rem; }
th, td { text-align: left; vertical-align: top; padding: .9rem 1rem .9rem 0; border-bottom: 1px solid var(--line); }
th { font-family: var(--mono); font-size: var(--s-1); letter-spacing: .05em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
td.num { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
tbody th { font-family: var(--body); font-size: 1rem; text-transform: none; letter-spacing: 0; color: var(--ink); font-weight: 600; }

/* Two column content */
.split { display: grid; grid-template-columns: minmax(0, 1fr) 20rem; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.split > * { min-width: 0; }
.aside { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 5.5rem); border: 1px solid var(--line); background: var(--surface); padding: 1.4rem; border-radius: var(--radius); display: grid; gap: .9rem; }
.aside ul { margin: 0; padding-left: 1.1em; color: var(--muted); }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .aside { position: static; } }

/* Checklist */
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: .6rem; }
.ticks li { padding-left: 1.6rem; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: .55em; width: .75rem; height: .4rem; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }

/* Areas */
.areas { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1.75rem 2rem; }
.areas h3 { font-size: 1.1rem; margin-bottom: .4rem; }
.areas p { color: var(--muted); font-size: .975rem; }

/* FAQ */
.faq { border-top: 1px solid var(--ink); max-width: 48rem; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 1.15rem 2rem 1.15rem 0; font-weight: 600; font-size: 1.075rem; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 0; top: 1rem; font-family: var(--mono); font-size: 1.3rem; color: var(--accent); }
.faq details[open] summary::after { content: "−"; }
.faq details > div { padding-bottom: 1.25rem; color: var(--muted); max-width: 42rem; }
.faq details > div > * + * { margin-top: .75em; }

/* CTA band */
.cta { background: var(--ink); color: var(--bg); }
.cta .wrap { padding-block: clamp(2.75rem, 7vw, 4.5rem); display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: end; }
.cta .wrap > * { min-width: 0; }
.cta h2 { color: var(--bg); }
.cta p { color: color-mix(in srgb, var(--bg) 75%, var(--ink)); margin-top: .75rem; max-width: 36rem; }
.cta .btn { background: var(--tape); border-color: var(--tape); color: var(--tape-ink); }
@media (max-width: 760px) { .cta .wrap { grid-template-columns: 1fr; } }

/* Form */
.form { display: grid; gap: 1.1rem; max-width: 40rem; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem; }
.form .row > * { min-width: 0; }
@media (max-width: 600px) { .form .row { grid-template-columns: 1fr; } }
.field { display: grid; gap: .35rem; }
.field label { font-weight: 600; font-size: .95rem; }
.field .hint { font-size: var(--s-1); color: var(--muted); }
input, select, textarea { font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: .7rem .8rem; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
textarea { min-height: 9rem; resize: vertical; }
.form-status { padding: .9rem 1rem; border-radius: var(--radius); border: 1px solid var(--accent); background: var(--surface); }

/* Footer */
.site-footer { border-top: 1px solid var(--ink); padding-block: 3rem 2.5rem; font-size: .95rem; }
.site-footer .wrap { display: grid; grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: 2rem; }
.site-footer .wrap > * { min-width: 0; }
.site-footer ul { list-style: none; padding: 0; margin: .6rem 0 0; display: grid; gap: .35rem; }
.site-footer a { color: var(--ink); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer p { color: var(--muted); margin-top: .6rem; max-width: 22rem; }
.legal { grid-column: 1 / -1; border-top: 1px solid var(--line); padding-top: 1.25rem; color: var(--muted); font-size: var(--s-1); display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr 1fr; } .site-footer .wrap > :first-child { grid-column: 1 / -1; } }
.brand-logo { height: 30px; width: auto; display: block; color: var(--ink); }
.site-footer .brand-logo { height: 26px; }