/* Linebuffer site: minimalist, dark by default, light on request (header switch, remembered per browser).
   Navy and paper grounds from the studio apps, gold only in the mark and the small rules. */
:root {
  --bg: #0B0F18;
  --paper: #151B2B;
  --ink: #DCE3EE;
  --ink-2: #8A94A8;
  --ink-3: #727E92;
  --line: #232A38;
  --line-strong: #DCE3EE;
  --accent: #D9A521;       /* gold: the pointer cell, eyebrow rules */
  --link: #DCE3EE;         /* links are ink, underlined */
  --sans: 'Overpass', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: 'Overpass Mono', 'IBM Plex Mono', Consolas, 'Liberation Mono', Menlo, monospace;
  --measure: 64ch;
  --wrap: 960px;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg: #FFFFFF;
  --paper: #F4F6FA;
  --ink: #1B2733;
  --ink-2: #5F6B7E;
  --ink-3: #6E7789;
  --line: #E1E6EE;
  --line-strong: #1B2733;
  --accent: #CC9A1E;
  --link: #1B2733;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 16px; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration: underline; text-decoration-color: var(--ink-3); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--accent); }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -0.015em; text-wrap: balance; font-weight: 600; }
h1, h2 { font-size: clamp(22px, 2.8vw, 30px); }
h3 { font-size: 17px; }
h4 { font-size: 16px; }
p { margin: 0; }
p + p { margin-top: 0.9em; }
ul { margin: 0; padding-left: 1.1em; }
li + li { margin-top: 3px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.prose { max-width: var(--measure); }
.muted { color: var(--ink-2); }
.small { font-size: 14px; }
.mono { font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em; }
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-3); display: flex; gap: 12px; align-items: center;
}
.eyebrow::before { content: ""; width: 18px; height: 2px; background: var(--accent); }
.lede { font-size: 18px; line-height: 1.45; color: var(--ink-2); }
.pill { display: inline-block; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.04em; padding: 1px 8px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--ink); white-space: nowrap; }
.pill.acc { border-color: var(--line-strong); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* Lockup */
.lockup .mk-static, svg .mk-static { display: none; }
@media (prefers-reduced-motion: reduce) { .lockup .mk-anim, svg .mk-anim { display: none; } .lockup .mk-static { display: block; } svg .mk-static { display: inline; } }
.lockup { display: inline-flex; align-items: center; gap: 0.36em; line-height: 1; color: inherit; text-decoration: none; }
.lockup svg { height: 0.44em; width: auto; display: block; }
.lockup .wm { font-weight: 700; letter-spacing: -0.025em; line-height: 1; font-variant-ligatures: none; }  /* Overpass merges the ff crossbars in a ligature */

/* Header */
.site-hdr { border-bottom: 1px solid var(--line); }
.site-hdr .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 58px; }
.site-hdr .lockup { font-size: 22px; }
.site-hdr .right { display: flex; align-items: center; gap: 22px; }
.site-hdr nav { display: flex; gap: 22px; }
.theme-toggle { display: inline-grid; place-items: center; width: 30px; height: 30px; padding: 0; color: var(--ink-2); background: none; border: 1px solid var(--line); border-radius: 999px; cursor: pointer; }
.theme-toggle:hover { color: var(--accent); border-color: var(--ink-3); }
.theme-toggle svg { display: block; }
.theme-toggle .ico-moon { display: none; }
:root[data-theme="light"] .theme-toggle .ico-sun { display: none; }
:root[data-theme="light"] .theme-toggle .ico-moon { display: block; }
.site-hdr nav a { color: var(--ink-2); text-decoration: none; font-size: 14px; padding: 4px 0; border-bottom: 2px solid transparent; }
.site-hdr nav a:hover { color: var(--ink); }
.site-hdr nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }
@media (max-width: 560px) { .site-hdr nav { gap: 14px; } .site-hdr nav a { font-size: 14px; } }

/* Sections */
main { display: block; }
section { padding: 36px 0; }
section + section { border-top: 1px solid var(--line); }
.sec-head { display: grid; gap: 8px; margin-bottom: 22px; max-width: var(--measure); }
.grid { display: grid; gap: 18px 32px; }
.g2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.g3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.g4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }
.g2fixed { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 680px) { .g2fixed { grid-template-columns: 1fr; } }

/* Service figures */
.fig { color: var(--ink); margin: 2px 0 10px; }
.fig svg { display: block; width: 100%; max-width: 140px; height: auto; }

/* Collapsible service cards: small figure left, title and subtitle always visible, bullets on demand */
.svc { gap: 0; }
.svc-head { all: unset; display: grid; grid-template-columns: 84px 1fr 14px; gap: 6px 16px; align-items: start; width: 100%; cursor: pointer; box-sizing: border-box; padding: 4px 0 6px; }
.svc-head:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }
.svc-head .fig { margin: 2px 0 0; }
.svc-head .fig svg { max-width: 84px; }
.svc-text { display: grid; gap: 4px; min-width: 0; }
.svc-text h3 { font-size: 16px; }
.svc-ind { position: relative; width: 14px; height: 14px; margin-top: 4px; }
.svc-ind::before, .svc-ind::after { content: ""; position: absolute; left: 0; top: 6px; width: 14px; height: 2px; background: var(--ink-3); transition: transform .3s ease, background .2s ease; }
.svc-ind::after { transform: rotate(90deg); }
.svc-head:hover .svc-ind::before, .svc-head:hover .svc-ind::after { background: var(--accent); }
.svc.open .svc-ind::after { transform: rotate(0deg); }
.svc.open .svc-ind::before, .svc.open .svc-ind::after { background: var(--accent); }
.svc-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .3s ease; }
.svc-inner { overflow: hidden; min-height: 0; display: grid; gap: 8px; padding-left: 100px; }
.svc-inner > :first-child { margin-top: 2px; }
.svc-inner > :last-child { margin-bottom: 6px; }
.svc.open .svc-body { grid-template-rows: 1fr; }
@media (max-width: 560px) { .svc-head { grid-template-columns: 64px 1fr 14px; } .svc-head .fig svg { max-width: 64px; } .svc-inner { padding-left: 0; } }

/* "Cards" are rule-topped entries, not boxes */
.card { border-top: 1px solid var(--line-strong); padding-top: 12px; display: grid; gap: 6px; align-content: start; min-width: 0; }
.card h3 { letter-spacing: -0.01em; }
.card .more { margin-top: 0; font-size: 14px; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn { display: inline-block; font-size: 14px; font-weight: 500; padding: 9px 14px; border: 1px solid var(--line-strong); background: transparent; color: var(--ink); text-decoration: none; border-radius: 2px; }
.btn:hover { background: var(--paper); }
.btn.primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: #1B2733; }

/* Hero */
.hero { padding: 36px 0 32px; }
.hero.with-figure .inner { max-width: none; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr); gap: 24px 44px; align-items: center; }
.hero.with-figure .htext { display: grid; gap: 14px; min-width: 0; }
.hfig { min-width: 0; }
.sysfig { display: block; width: 100%; max-width: 520px; height: auto; color: var(--ink); }
.sysfig .hf-lbl text { font-family: var(--mono); font-size: 11px; fill: var(--ink-3); letter-spacing: 0.03em; }
@media (max-width: 860px) { .hero.with-figure .inner { grid-template-columns: 1fr; } .sysfig { max-width: 440px; } }
@media (max-width: 460px) { .sysfig .hf-lbl { display: none; } }
.hero .inner { display: grid; gap: 14px; max-width: 760px; }
.hero h1 { max-width: 28ch; }
.hero .lede { max-width: 60ch; }

/* Process (ordered) */
.steps { display: grid; gap: 0; }
.step { display: grid; grid-template-columns: 40px 1fr; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); }
.step:last-child { border-bottom: 1px solid var(--line); }
.step .n { font-family: var(--mono); font-size: 12px; color: var(--accent); padding-top: 4px; }
.step h3 { margin-bottom: 2px; }

/* Work items */
.work { display: grid; gap: 0; }
.work .item { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 16px 40px; padding: 16px 0; border-top: 1px solid var(--line); }
.work .item:last-child { border-bottom: 1px solid var(--line); }
.work .item h3 { margin-bottom: 4px; }
.work .item .delivered h4 { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin-bottom: 4px; }
@media (max-width: 720px) { .work .item { grid-template-columns: 1fr; gap: 14px; } }

/* Tools: one row per tool, screenshot beside larger text */
.tools { display: grid; gap: 28px; }
.tool { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 20px 32px; align-items: start; padding-top: 16px; border-top: 1px solid var(--line-strong); }
.tool-shot { display: block; }
.tool-shot img { width: 100%; height: auto; border: 1px solid var(--line); background: var(--paper); }
.tool-shot-empty { aspect-ratio: 750 / 475; border: 1px solid var(--line); background: var(--paper); display: grid; place-items: center; color: var(--ink-3); }
.tool-shot-empty svg { width: 30%; height: auto; }
.tool-text { display: grid; gap: 10px; justify-items: start; }
.tool-text p, .tool-text .head { justify-self: stretch; }
.tool-text .head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.tool-text h3 { font-size: 24px; letter-spacing: -0.015em; }
.tool-text h3 a { text-decoration: none; }
.tool-text h3 a:hover { text-decoration: underline; text-decoration-color: var(--accent); }
.tool-text .ver { font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.tool-text p { font-size: 17px; line-height: 1.5; }
.tool-text .more { font-size: 15px; }
@media (max-width: 720px) { .tool { grid-template-columns: 1fr; } }
.tool-hero { display: grid; gap: 14px; max-width: 760px; }
.tool-hero .head { display: flex; align-items: baseline; gap: 14px; flex-wrap: wrap; }
.tool-hero .ver { font-family: var(--mono); font-size: 13px; color: var(--ink-3); }
.gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 16px; }
.gallery figure { margin: 0; display: grid; gap: 8px; }
.gallery img { border: 1px solid var(--line); }
.gallery figcaption { font-size: 13px; color: var(--ink-2); }
.features { display: grid; gap: 0; }
.features .row { display: grid; grid-template-columns: 140px 1fr; gap: 14px; padding: 10px 0; border-top: 1px solid var(--line); }
.features .row:last-child { border-bottom: 1px solid var(--line); }
.features .k { font-weight: 600; }
@media (max-width: 640px) { .features .row { grid-template-columns: 1fr; gap: 4px; } }

/* Key points under a tool's lede: four headed statements, no markers */
.points { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); gap: 14px 28px; max-width: 900px; margin-top: 4px; }
.point { display: grid; gap: 4px; align-content: start; }
.point h3 { font-size: 15px; }

/* Ways to run a tool: three options side by side */
.opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 18px 28px; }
.opt { display: grid; gap: 8px; align-content: start; justify-items: start; }
.opt h3 { font-size: 17px; }
.opt p { justify-self: stretch; }
.opt .btn { margin-top: 4px; }
.tool-hero { max-width: 900px; }
.tool-hero.with-image { max-width: none; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 20px 40px; align-items: start; }
.tool-hero.with-image .tool-intro { display: grid; gap: 14px; }
.tool-paras { display: grid; gap: 10px; max-width: 60ch; }
.tool-paras p { font-size: 15px; line-height: 1.55; }
.tool-hero-img { display: block; align-self: center; }
.tool-hero-img img { width: 100%; height: auto; border: 1px solid var(--line); background: var(--paper); }
@media (max-width: 860px) { .tool-hero.with-image { grid-template-columns: 1fr; } }

/* Interface diagram */
.io-wrap { max-width: 760px; color: var(--ink); }
.io-wrap svg { width: 100%; height: auto; display: block; }
.io-notes { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 16px 32px; margin-top: 18px; max-width: 900px; }
.io-notes h4 { margin-bottom: 4px; }

/* FAQ */
.faq { display: grid; gap: 18px; max-width: var(--measure); }
.qa { display: grid; gap: 4px; }
.qa h3 { font-size: 16px; }

/* Contact card page (QR target) */
.vcard { display: grid; gap: 18px; max-width: 480px; }
.vlines { display: grid; gap: 6px; font-size: 15px; }
.vlines a { text-decoration: none; }
.vlines a:hover { text-decoration: underline; text-decoration-color: var(--accent); }

/* Blog */
.posts { display: grid; gap: 0; }
.post-item { padding: 18px 0; border-top: 1px solid var(--line); display: grid; gap: 5px; max-width: var(--measure); }
.post-item:last-child { border-bottom: 1px solid var(--line); }
.post-link { text-decoration: none; }
.post-link h2 { font-size: 20px; }
.post-link:hover h2 { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 4px; }
.post-meta { color: var(--ink-3); }

.post-head { padding: 44px 0 0; }
.post-head h1 { max-width: 24ch; margin-bottom: 10px; }
.post-head .post-meta { margin-bottom: 14px; }
.post-head .lede { max-width: var(--measure); }
.toc { padding: 22px 0 0; }
.toc ul { list-style: none; padding: 0; display: grid; gap: 4px; max-width: var(--measure); border-left: 2px solid var(--accent); padding-left: 14px; }
.toc a { font-size: 14px; color: var(--ink-2); text-decoration: none; }
.toc a:hover { color: var(--ink); }

.post-body { padding: 8px 0 44px; }
.post-body .wrap > * { max-width: var(--measure); }
.post-body h2 { margin: 34px 0 10px; }
.post-body h3 { margin: 24px 0 6px; }
.post-body p { margin: 0 0 14px; }
.post-body ul, .post-body ol { margin: 0 0 14px; padding-left: 1.2em; }
.post-body li { margin-bottom: 4px; }
.post-body blockquote { margin: 0 0 16px; padding: 2px 0 2px 16px; border-left: 2px solid var(--accent); color: var(--ink-2); }
.post-body hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }
.post-body code { font-family: var(--mono); font-size: 0.9em; background: var(--paper); padding: 1px 5px; border-radius: 2px; }
.post-body pre.code { max-width: none; background: var(--paper); border: 1px solid var(--line); padding: 14px 16px; overflow-x: auto; margin: 0 0 16px; }
.post-body pre.code code { background: none; padding: 0; font-size: 13px; line-height: 1.55; }
.post-body pre.code[data-lang]::before { content: attr(data-lang); display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.post-body figure { margin: 0 0 18px; max-width: none; display: grid; gap: 7px; }
.post-body figure img { border: 1px solid var(--line); width: 100%; }
.post-body figcaption { font-size: 14px; color: var(--ink-2); max-width: var(--measure); }
.post-body .tbl { max-width: none; overflow-x: auto; margin: 0 0 16px; }
.post-body table { border-collapse: collapse; font-size: 15px; }
.post-body th, .post-body td { text-align: left; padding: 7px 14px 7px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.post-body th { font-family: var(--mono); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; }

/* Contact strip */
.contact { border-top: 1px solid var(--line); }
.contact .inner { display: grid; gap: 8px; max-width: var(--measure); }
.contact .email { font-size: clamp(18px, 2.6vw, 24px); font-weight: 600; letter-spacing: -0.01em; text-decoration: none; color: var(--ink); }
.contact .email:hover { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 6px; }

/* Footer */
.site-ftr { padding: 24px 0 40px; color: var(--ink-2); font-size: 13px; border-top: 1px solid var(--line); }
.site-ftr .wrap { display: grid; gap: 18px; grid-template-columns: 1fr auto; align-items: end; }
.site-ftr .lockup { font-size: 18px; color: var(--ink); }
.site-ftr .col { display: grid; gap: 3px; }
.site-ftr a { color: var(--ink-2); text-decoration: none; }
.site-ftr a:hover { color: var(--ink); }
@media (max-width: 640px) { .site-ftr .wrap { grid-template-columns: 1fr; } }

/* Draft banner (only in --draft builds) */
.draft-banner { background: var(--accent); color: #1B2733; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; text-align: center; padding: 6px 12px; }

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