/* LaserPrintGuide: technical editorial design. Graphite and clean white, with restrained electric-blue "laser" accents.
   Square geometry (2px radius), ruled lines instead of cards, monospace labels and index numbers. System fonts only. */
:root {
  --graphite-950: #0f1114;
  --graphite-900: #16191e;
  --graphite-800: #20242b;
  --graphite-700: #2f343d;
  --graphite-500: #6b7380;
  --ink: #15181d;
  --text: #2b3038;
  --muted: #5b6472;
  --line: #dde1e7;
  --line-2: #c5cbd4;
  --paper: #ffffff;
  --paper-2: #f4f5f7;
  --paper-3: #eceef2;
  --blue: #1f5eff;
  --blue-ink: #1748cc;
  --blue-bright: #6c9dff;
  --blue-soft: #eaf0ff;
  --setup: #1f5eff;
  --connect: #0b7285;
  --fix: #b4500b;
  --learn: #4a5260;
  --warn-bg: #fff6ec;
  --warn-line: #e08a2e;
  --focus: #1f5eff;
  --radius: 2px;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 24px; }
body { margin: 0; font-family: var(--sans); font-size: 17px; line-height: 1.65; color: var(--text); background: var(--paper); text-rendering: optimizeLegibility; }
img, svg { max-width: 100%; }
a { color: var(--blue-ink); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: var(--radius); }
h1, h2, h3 { color: var(--ink); line-height: 1.15; letter-spacing: -0.022em; }
h1 { font-size: clamp(2.05rem, 4.6vw, 3.25rem); margin: 0 0 .6rem; font-weight: 800; }
h2 { font-size: clamp(1.4rem, 2.5vw, 1.85rem); margin: 0 0 .75rem; font-weight: 750; }
h3 { font-size: 1.1rem; margin: 0 0 .35rem; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0 0 1rem; }
.icon { width: 1.2em; height: 1.2em; flex: none; vertical-align: -0.2em; }
.marker { width: 11px; height: 11px; flex: none; }
.marker-setup { color: var(--setup); }
.marker-connect { color: var(--connect); }
.marker-fix { color: var(--fix); }
.marker-learn { color: var(--learn); }
.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.wrap { width: min(1200px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(780px, 100% - 32px); }
.center { text-align: center; }
.small { font-size: .9rem; color: var(--muted); }
.idx { font-family: var(--mono); font-size: .78em; font-weight: 600; letter-spacing: .02em; color: var(--muted); font-variant-numeric: tabular-nums; }
.skip-link { position: absolute; left: 12px; top: -60px; z-index: 50; background: var(--paper); color: var(--ink); padding: 10px 14px; font-weight: 700; border: 2px solid var(--blue); }
.skip-link:focus { top: 12px; }
main:focus { outline: none; }

/* ---------- Masthead ---------- */
.masthead { background: var(--graphite-900); color: #e8ebf0; position: relative; z-index: 20; }
.masthead-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; padding: 12px 0; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; margin-right: auto; }
.brand:hover { color: #fff; }
.brand .logo-mark { width: 36px; height: 36px; flex: none; box-shadow: 0 0 0 1px #3a404a; border-radius: 3px; }
.brand-word { font-size: 1.22rem; letter-spacing: -0.02em; font-weight: 500; line-height: 1; }
.brand-word b { font-weight: 800; }
.brand-word i { font-style: normal; font-weight: 400; color: var(--blue-bright); margin-left: 1px; }
.head-search { order: 3; flex: 1 1 100%; display: flex; align-items: stretch; background: var(--graphite-800); border: 1px solid #3a404a; border-radius: var(--radius); }
.head-search input { flex: 1; min-width: 0; background: transparent; border: 0; color: #fff; font: inherit; font-size: .95rem; padding: 8px 12px; }
.head-search input::placeholder { color: #a7afbb; }
.head-search input:focus { outline: none; }
.head-search:focus-within { border-color: var(--blue-bright); box-shadow: 0 0 0 2px rgba(108, 157, 255, .35); }
.head-search button { background: transparent; border: 0; color: #dfe4ec; padding: 0 12px; cursor: pointer; }
.head-search button:hover { color: #fff; }
.menu-toggle { display: inline-flex; align-items: center; gap: 8px; background: transparent; color: #fff; border: 1px solid #4a515d; border-radius: var(--radius); padding: 8px 12px; font: inherit; font-size: .9rem; font-weight: 600; cursor: pointer; }
.menu-toggle:hover { border-color: var(--blue-bright); }
.menu-toggle .icon-close { display: none; }
.masthead.is-open .menu-toggle .icon-open { display: none; }
.masthead.is-open .menu-toggle .icon-close { display: inline; }
.primary-nav { display: none; order: 4; flex: 1 1 100%; padding: 4px 0 14px; }
.masthead.is-open .primary-nav { display: block; }
.primary-nav ul { list-style: none; margin: 0; padding: 0; }
.primary-nav > ul:first-child { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.primary-nav a { display: block; color: #f1f3f6; text-decoration: none; padding: 10px 12px; font-weight: 600; border-left: 2px solid transparent; }
.primary-nav a:hover { background: var(--graphite-800); color: #fff; }
.primary-nav a[aria-current] { border-left-color: var(--blue-bright); background: var(--graphite-800); }
.nav-topics-h { margin: 14px 0 4px; font-family: var(--mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: #a7afbb; }
.nav-topics { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.nav-topics a { display: flex; gap: 8px; align-items: baseline; font-weight: 500; font-size: .95rem; padding: 8px 12px; }
.nav-topics .idx { color: var(--blue-bright); }
.laser-line { height: 2px; background: var(--blue); box-shadow: 0 0 10px rgba(31, 94, 255, .55); }
.topic-bar { display: none; background: var(--paper); border-bottom: 1px solid var(--line); }
.topic-bar ul { list-style: none; margin: 0; padding: 0; display: flex; justify-content: space-between; }
.topic-bar a { display: flex; align-items: baseline; gap: 6px; padding: 11px 4px; color: var(--ink); text-decoration: none; font-size: .9rem; font-weight: 600; border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap; }
.topic-bar a:hover { color: var(--blue-ink); }
.topic-bar a[aria-current] { border-bottom-color: var(--blue); color: var(--blue-ink); }
@media (min-width: 1080px) {
  .masthead-inner { flex-wrap: nowrap; gap: 24px; padding: 14px 0; }
  .brand { margin-right: 8px; }
  .menu-toggle { display: none; }
  .primary-nav { display: block; order: 2; flex: 1 1 auto; padding: 0; }
  .primary-nav > ul:first-child { display: flex; gap: 2px; }
  .primary-nav > ul a { padding: 8px 12px; border-left: 0; border-bottom: 2px solid transparent; font-size: .97rem; }
  .primary-nav > ul a[aria-current] { background: transparent; border-bottom-color: var(--blue-bright); }
  .primary-nav .nav-topics-h, .primary-nav > ul.nav-topics { display: none; }
  .head-search { order: 3; flex: 0 1 250px; }
  .topic-bar { display: block; }
}

/* ---------- Buttons, labels ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: var(--radius); padding: 12px 20px; font: inherit; font-weight: 700; cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-ink); color: #fff; }
.eyebrow { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: .78rem; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; color: var(--muted); margin: 0 0 14px; }
.eyebrow-line { width: 28px; height: 2px; background: var(--blue); flex: none; }
.kicker { font-family: var(--mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin: 0 0 4px; }
.tag { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: .72rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; padding: 3px 8px 3px 7px; border: 1px solid currentColor; border-radius: var(--radius); line-height: 1.3; background: var(--paper); }
.tag-setup { color: var(--setup); }
.tag-connect { color: var(--connect); }
.tag-fix { color: var(--fix); }
.tag-learn { color: var(--learn); }
.lede { font-size: 1.14rem; color: var(--text); max-width: 64ch; }
.more-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; text-decoration: none; }
.more-link:hover { text-decoration: underline; }
.more-link-wrap { margin: 24px 0 0; }

/* ---------- Search form ---------- */
.search-form { margin: 26px 0 0; max-width: 620px; }
.search-label { display: block; font-family: var(--mono); font-size: .78rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.search-row { display: flex; align-items: center; background: var(--paper); border: 2px solid var(--graphite-900); border-radius: var(--radius); padding: 4px; }
.search-row-icon { margin: 0 4px 0 10px; color: var(--muted); }
.search-row input { flex: 1; min-width: 0; border: 0; background: transparent; font: inherit; font-size: 1.02rem; color: var(--ink); padding: 10px 8px; }
.search-row input:focus { outline: none; }
.search-row:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(31, 94, 255, .2); }
.search-row .btn { padding: 11px 18px; }

/* ---------- Hero ---------- */
.hero { position: relative; background-color: var(--paper); background-image: linear-gradient(var(--paper-3) 1px, transparent 1px), linear-gradient(90deg, var(--paper-3) 1px, transparent 1px); background-size: 32px 32px; background-position: -1px -1px; border-bottom: 1px solid var(--line); padding: 48px 0 52px; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, var(--paper) 30%, rgba(255, 255, 255, .7) 60%, rgba(255, 255, 255, .2)); pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1fr); gap: 36px; align-items: center; }
.hero h1 { max-width: 15ch; }
.hero-popular { margin: 16px 0 0; display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: .93rem; }
.hero-popular span { font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); align-self: center; }
.hero-visual { display: none; }
.hero-figure { margin: 0; background: var(--paper); border: 1px solid var(--line-2); padding: 16px 16px 12px; position: relative; }
.hero-figure::before, .hero-figure::after { content: ""; position: absolute; width: 14px; height: 14px; border: 2px solid var(--graphite-900); }
.hero-figure::before { top: -7px; left: -7px; border-right: 0; border-bottom: 0; }
.hero-figure::after { bottom: -7px; right: -7px; border-left: 0; border-top: 0; }
.hero-figure figcaption { font-size: .85rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 8px; margin-top: 6px; }
.hero-art { display: block; width: 100%; height: auto; }
.dg-grid path { stroke: var(--paper-3); stroke-width: 1; }
.dg-body { fill: var(--paper); stroke: var(--graphite-900); stroke-width: 2.5; }
.dg-sheet { fill: var(--paper); stroke: var(--graphite-700); stroke-width: 1.5; }
.dg-lineart { stroke: var(--line-2); stroke-width: 3; fill: none; }
.dg-part { fill: var(--paper-2); stroke: var(--graphite-700); stroke-width: 1.5; }
.dg-drum { fill: var(--blue-soft); stroke: var(--blue); stroke-width: 2; }
.dg-roller { fill: #fff3e6; stroke: var(--fix); stroke-width: 2; }
.dg-heat { stroke: var(--fix); stroke-width: 1.6; fill: none; }
.dg-beam { stroke: var(--blue); stroke-width: 2.5; }
.dg-dot { fill: var(--blue); }
.dg-path { fill: none; stroke: var(--graphite-500); stroke-width: 1.5; stroke-dasharray: 5 5; }
.dg-lead { fill: none; stroke: var(--graphite-500); stroke-width: 1; }
.dg-labels text { font-family: var(--mono); font-size: 12px; font-weight: 600; fill: var(--ink); }
@media (min-width: 900px) {
  .hero { padding: 64px 0 68px; }
  .hero-grid { grid-template-columns: 1.15fr 1fr; gap: 48px; }
  .hero-visual { display: block; }
}

/* ---------- Sections ---------- */
.section { padding: 56px 0; }
.section-tint { background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-paper { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-dark { background: var(--graphite-900); color: #d9dee6; }
.section-dark h2 { color: #fff; }
.section-dark a { color: var(--blue-bright); }
.section-dark a:hover { color: #fff; }
.section-head { margin-bottom: 26px; max-width: 760px; }
.section-head p:last-child { margin-bottom: 0; color: var(--muted); }
.section-head-row { max-width: none; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 6px 24px; border-bottom: 2px solid var(--graphite-900); padding-bottom: 12px; }
.section-head-row h2 { margin: 0; }
.section-head-row p { max-width: 60ch; }

/* Topic shortcuts: a ruled index, not cards */
.section-index { padding-top: 48px; }
.sc-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--line); }
.sc a { display: grid; grid-template-columns: auto auto 1fr; grid-template-areas: "no ico title" "no ico tag" "no ico count"; column-gap: 14px; align-items: center; padding: 16px 6px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--text); position: relative; }
.sc a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--blue); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.sc a:hover::after, .sc a:focus-visible::after { transform: scaleX(1); }
.sc-no { grid-area: no; font-family: var(--mono); font-weight: 700; color: var(--muted); font-size: .85rem; }
.sc-ico { grid-area: ico; width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid var(--line-2); color: var(--ink); }
.sc-ico .icon { width: 24px; height: 24px; }
.sc-setup .sc-ico { color: var(--setup); }
.sc-connect .sc-ico { color: var(--connect); }
.sc-fix .sc-ico { color: var(--fix); }
.sc-learn .sc-ico { color: var(--learn); }
.sc strong { grid-area: title; color: var(--ink); font-size: 1.05rem; line-height: 1.25; }
.sc-tag { grid-area: tag; font-size: .9rem; color: var(--muted); line-height: 1.4; }
.sc-count { grid-area: count; font-family: var(--mono); font-size: .75rem; color: var(--muted); letter-spacing: .04em; margin-top: 2px; }
.sc a:hover strong { color: var(--blue-ink); }
.sc-also { margin: 18px 0 0; display: flex; flex-wrap: wrap; gap: 8px 18px; align-items: center; font-size: .95rem; color: var(--muted); }
.sc-also a { display: inline-flex; gap: 6px; align-items: center; font-weight: 600; }
@media (min-width: 700px) { .sc-grid { grid-template-columns: 1fr 1fr; column-gap: 32px; } }
@media (min-width: 1080px) {
  .sc-grid { grid-template-columns: repeat(7, 1fr); column-gap: 0; border-top: 0; border-left: 1px solid var(--line); }
  .sc a { grid-template-columns: 1fr; grid-template-areas: "no" "ico" "title" "tag" "count"; row-gap: 8px; align-items: start; padding: 16px 14px 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); border-top: 1px solid var(--line); height: 100%; }
  .sc-grid li { min-width: 0; }
}

/* Lanes: three tracks side by side */
.lanes { display: grid; gap: 22px; }
.lane { border: 1px solid var(--line-2); border-top: 4px solid var(--setup); background: var(--paper); display: flex; flex-direction: column; }
.lane-connect { border-top-color: var(--connect); }
.lane-fix { border-top-color: var(--fix); }
.lane-head { padding: 18px 20px 14px; border-bottom: 1px solid var(--line); }
.lane-head p:last-child { margin: 0; color: var(--muted); font-size: .95rem; }
.lane-k { display: flex; align-items: center; gap: 8px; margin: 0 0 6px; font-family: var(--mono); font-size: .75rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.lane-setup .lane-k { color: var(--setup); }
.lane-connect .lane-k { color: var(--connect); }
.lane-fix .lane-k { color: var(--fix); }
.lane-list { list-style: none; margin: 0; padding: 0; flex: 1; }
.lane-list li { display: grid; grid-template-columns: 30px 1fr; gap: 6px; padding: 13px 20px; border-bottom: 1px solid var(--line); }
.lane-list li:last-child { border-bottom: 0; }
.lane-no { font-family: var(--mono); font-size: .8rem; color: var(--muted); padding-top: 3px; }
.lane-list a { font-weight: 650; color: var(--ink); text-decoration: none; line-height: 1.35; }
.lane-list a:hover { color: var(--blue-ink); text-decoration: underline; }
.lane-more { margin: 0; padding: 12px 20px; border-top: 1px solid var(--line); background: var(--paper-2); font-size: .93rem; }
.lane-more a { display: inline-flex; gap: 6px; align-items: center; font-weight: 700; text-decoration: none; }
@media (min-width: 900px) { .lanes { grid-template-columns: repeat(3, 1fr); } }

/* Decision path teaser */
.dp-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 26px; align-items: center; }
.dp-list { list-style: none; margin: 0; padding: 0; counter-reset: dp; border-left: 2px solid var(--graphite-900); }
.dp-list li { border-bottom: 1px solid var(--line); }
.dp-list li:last-child { border-bottom: 0; }
.dp-list a { display: flex; gap: 14px; align-items: center; padding: 14px 16px; color: var(--ink); font-weight: 650; text-decoration: none; }
.dp-list a:hover { background: var(--blue-soft); color: var(--blue-ink); }
.dp-k { width: 32px; height: 32px; flex: none; display: grid; place-items: center; font-family: var(--mono); font-weight: 700; background: var(--graphite-900); color: #fff; }
@media (min-width: 900px) { .dp-grid { grid-template-columns: 1fr 1.1fr; gap: 48px; } }

/* ---------- Diagrams ---------- */
.diagram { container-type: inline-size; margin: 28px 0; border: 1px solid var(--line-2); background: var(--paper); padding: 18px; }
.diagram-title { font-family: var(--mono); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); margin: 0 0 14px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.diagram figcaption { font-size: .9rem; color: var(--muted); margin-top: 14px; }
.pc-k { font-family: var(--mono); font-size: .72rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--blue-ink); margin: 0 0 4px; }
.process-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: ps; }
.process-steps li { counter-increment: ps; display: grid; grid-template-columns: 48px 1fr; grid-template-rows: auto auto; column-gap: 14px; padding: 12px 0; border-bottom: 1px dashed var(--line-2); }
.process-steps li:last-child { border-bottom: 0; }
.ps-ico { grid-row: span 2; width: 48px; height: 48px; display: grid; place-items: center; border: 1.5px solid var(--graphite-900); color: var(--blue); position: relative; }
.ps-ico::after { content: counter(ps, decimal-leading-zero); position: absolute; top: -8px; right: -8px; font-family: var(--mono); font-size: .65rem; font-weight: 700; background: var(--graphite-900); color: #fff; padding: 1px 4px; }
.ps-ico .icon { width: 26px; height: 26px; }
.process-steps strong { color: var(--ink); }
.process-steps span:not(.ps-ico) { font-size: .93rem; color: var(--text); line-height: 1.45; }
@container (min-width: 860px) {
  .process-steps { grid-template-columns: repeat(5, 1fr); gap: 0; }
  .process-steps li { grid-template-columns: 1fr; grid-template-rows: auto; row-gap: 6px; padding: 6px 18px 6px 0; border-bottom: 0; position: relative; }
  .process-steps li + li { padding-left: 18px; border-left: 1px dashed var(--line-2); }
  .ps-ico { grid-row: auto; margin-bottom: 6px; }
}
.path-cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.path-cards li { border: 1px solid var(--line); border-left: 3px solid var(--connect); padding: 12px 14px; display: flex; flex-direction: column; gap: 4px; }
.path-cards strong { color: var(--ink); }
.path-cards span { font-size: .95rem; line-height: 1.5; }
.path-cards em { font-style: normal; font-size: .86rem; color: var(--muted); }
@container (min-width: 600px) { .path-cards { grid-template-columns: 1fr 1fr; } }
.decision { list-style: none; margin: 0; padding: 0; }
.decision li { display: grid; grid-template-columns: 1fr; gap: 4px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.decision li:last-child { border-bottom: 0; }
.dc-sym { color: var(--ink); }
.dc-arrow { display: none; color: var(--muted); }
.decision a { font-weight: 700; }
@container (min-width: 600px) { .decision li { grid-template-columns: 1fr 28px 220px; align-items: center; gap: 10px; } .dc-arrow { display: block; } }
.conn-grid, .td-grid { display: grid; gap: 12px; }
.conn-grid > div, .td-grid > div { border: 1px solid var(--line); padding: 12px 14px; }
.conn-grid strong, .td-grid strong { display: block; color: var(--ink); margin-bottom: 6px; }
.conn-grid ul { margin: 0; padding-left: 18px; font-size: .93rem; }
.td-grid > div > span { font-size: .93rem; display: block; }
.td-art { display: flex; align-items: center; gap: 8px; margin: 8px 0 10px; }
.td-box { font-family: var(--mono); font-size: .78rem; font-weight: 600; padding: 12px 10px; border: 1.5px solid var(--graphite-900); background: var(--paper-2); }
.td-drum { background: var(--blue-soft); border-color: var(--blue); }
.td-plus { font-family: var(--mono); font-weight: 700; }
@container (min-width: 640px) { .conn-grid { grid-template-columns: repeat(3, 1fr); } .td-grid { grid-template-columns: 1fr 1fr; } }

/* ---------- Guide lists ---------- */
.guide-list { list-style: none; margin: 0; padding: 0; display: grid; }
.guide-list-2col { gap: 0 36px; }
@media (min-width: 800px) { .guide-list-2col { grid-template-columns: 1fr 1fr; } }
.guide-row { display: flex; gap: 18px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.guide-row-no { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; color: var(--blue-ink); min-width: 28px; padding-top: 30px; }
.guide-row-text { min-width: 0; }
.guide-row-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; margin: 0 0 8px; }
.guide-row-cat { font-family: var(--mono); font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.guide-row h2, .guide-row h3, .h3-like { font-size: 1.12rem; margin: 0 0 6px; line-height: 1.3; }
.guide-row h2 a, .guide-row h3 a { color: var(--ink); text-decoration: none; }
.guide-row h2 a:hover, .guide-row h3 a:hover { color: var(--blue-ink); text-decoration: underline; }
.guide-row p { margin: 0 0 6px; font-size: .97rem; }
.guide-row-meta { font-family: var(--mono); font-size: .76rem !important; color: var(--muted); letter-spacing: .02em; }
.search-results .guide-row { padding: 16px 0; }
mark { background: #fff1a8; color: inherit; padding: 0 1px; }

/* ---------- Page hero, breadcrumbs ---------- */
.page-hero { background: var(--paper-2); border-bottom: 1px solid var(--line); padding: 26px 0 36px; }
.crumbs ol { list-style: none; margin: 0 0 18px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 0; font-size: .87rem; }
.crumbs li:not(:last-child)::after { content: "/"; margin: 0 8px; color: var(--graphite-500); }
.crumbs a { color: var(--text); }
.crumbs a:hover { color: var(--blue-ink); }
.crumbs [aria-current] { color: var(--muted); }
.cat-hero { border-bottom: 2px solid var(--graphite-900); }
.cat-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; align-items: start; }
.cat-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; margin: 0 0 12px; }
.cat-meta .idx { font-size: .85rem; color: var(--ink); }
.cat-badge { display: none; width: 112px; height: 112px; place-items: center; border: 1.5px solid var(--graphite-900); background: var(--paper); color: var(--setup); position: relative; }
.cat-badge .icon { width: 56px; height: 56px; }
.cat-hero-connect .cat-badge { color: var(--connect); }
.cat-hero-fix .cat-badge { color: var(--fix); }
.cat-hero-learn .cat-badge { color: var(--learn); }
.cat-intro { max-width: 70ch; }
.cat-intro p:last-child { margin-bottom: 0; }
@media (min-width: 800px) { .cat-hero-grid { grid-template-columns: minmax(0, 1fr) auto; } .cat-badge { display: grid; margin-top: 40px; } }
.cat-layout { display: grid; gap: 36px; padding: 36px 0 64px; }
.cat-main h2 { font-size: 1.05rem; font-family: var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 4px; border-bottom: 2px solid var(--graphite-900); padding-bottom: 10px; }
@media (min-width: 960px) { .cat-layout { grid-template-columns: minmax(0, 1fr) 320px; gap: 48px; } }
.aside-box { border: 1px solid var(--line-2); padding: 18px 20px; margin-bottom: 18px; background: var(--paper); }
.aside-box h2 { font-size: .8rem; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; margin: 0 0 12px; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.checks li { display: flex; gap: 10px; align-items: flex-start; font-size: .96rem; line-height: 1.5; }
.checks .icon { color: var(--blue); margin-top: 2px; }
.other-cats { list-style: none; margin: 0; padding: 0; }
.other-cats a { display: flex; gap: 10px; align-items: baseline; padding: 8px 0; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 600; font-size: .95rem; }
.other-cats li:last-child a { border-bottom: 0; }
.other-cats a:hover { color: var(--blue-ink); }
.other-cats-row { display: grid; grid-template-columns: 1fr; column-gap: 24px; }
@media (min-width: 640px) { .other-cats-row { grid-template-columns: 1fr 1fr; } }
.other-cats-row li:last-child a { border-bottom: 1px solid var(--line); }
.aside-note { font-size: .88rem; color: var(--muted); }
.jump-list { list-style: none; margin: 18px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.jump-list a { display: inline-flex; gap: 8px; align-items: baseline; padding: 6px 12px; border: 1px solid var(--line-2); background: var(--paper); color: var(--ink); text-decoration: none; font-size: .92rem; font-weight: 600; }
.jump-list a:hover { border-color: var(--blue); color: var(--blue-ink); }
.all-list { padding: 24px 0 64px; }
.all-group { padding-top: 26px; }
.all-group h2 { display: flex; gap: 12px; align-items: baseline; border-bottom: 2px solid var(--graphite-900); padding-bottom: 10px; margin-bottom: 0; }
.all-group h2 a { color: var(--ink); text-decoration: none; }
.all-group h2 a:hover { color: var(--blue-ink); text-decoration: underline; }

/* ---------- Guide page ---------- */
.guide-hero { background: var(--paper); border-bottom: 1px solid var(--line); padding-bottom: 0; }
.guide-hero h1 { max-width: 24ch; }
.guide-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin: 0 0 14px; font-size: .92rem; }
.guide-kicker a { font-weight: 600; }
.guide-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 26px 0 0; border-top: 2px solid var(--graphite-900); }
.guide-facts > div { padding: 12px 14px 14px 0; border-bottom: 1px solid var(--line); }
.guide-facts dt { font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 2px; }
.guide-facts dd { margin: 0; font-size: .93rem; color: var(--ink); font-weight: 600; }
.guide-facts .gf-wide { grid-column: 1 / -1; }
@media (min-width: 900px) {
  .guide-facts { grid-template-columns: repeat(4, auto) minmax(0, 1.6fr); }
  .guide-facts > div { padding-right: 22px; border-bottom: 0; }
  .guide-facts > div + div { padding-left: 18px; border-left: 1px solid var(--line); }
  .guide-facts .gf-wide { grid-column: auto; }
}
.guide-layout { display: grid; gap: 30px; padding: 34px 0 64px; }
@media (min-width: 1000px) { .guide-layout { grid-template-columns: 240px minmax(0, 1fr); gap: 52px; } .toc { position: sticky; top: 20px; align-self: start; max-height: calc(100vh - 40px); overflow: auto; } }
.toc { border-top: 2px solid var(--graphite-900); padding-top: 12px; }
.toc h2 { font-size: .75rem; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; margin: 0 0 8px; }
.toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.toc li { counter-increment: toc; }
.toc a { display: grid; grid-template-columns: 28px 1fr; padding: 6px 0; color: var(--text); text-decoration: none; font-size: .93rem; line-height: 1.4; border-bottom: 1px solid var(--line); }
.toc a::before { content: counter(toc, decimal-leading-zero); font-family: var(--mono); font-size: .75rem; color: var(--muted); padding-top: 2px; }
.toc a:hover { color: var(--blue-ink); }
.guide-body { min-width: 0; max-width: 780px; }
.safety-box { border: 1px solid var(--warn-line); border-left: 4px solid var(--warn-line); background: var(--warn-bg); padding: 14px 16px; margin-bottom: 20px; }
.safety-box p { display: flex; gap: 12px; margin: 0; font-size: .97rem; }
.safety-box .icon { color: var(--fix); margin-top: 3px; }
.needs { border: 1px solid var(--line-2); padding: 16px 18px; margin-bottom: 30px; }
.needs h2 { display: flex; gap: 10px; align-items: center; font-size: .8rem; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; margin: 0 0 12px; }
.needs h2 .icon { color: var(--blue); }
.prose { font-size: 1.04rem; }
.prose h2 { display: flex; align-items: baseline; gap: 12px; font-size: clamp(1.35rem, 2.4vw, 1.7rem); margin: 44px 0 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.prose > h2:first-child { margin-top: 0; }
.sec-no { font-family: var(--mono); font-size: .62em; font-weight: 700; color: var(--blue-ink); letter-spacing: .02em; }
.prose h3 { font-size: 1.15rem; margin: 28px 0 8px; }
.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1.1rem; }
.prose li { margin: 0 0 .55rem; }
.prose li::marker { color: var(--graphite-500); }
.prose ol { list-style: none; padding-left: 0; counter-reset: step; }
.prose ol > li { counter-increment: step; position: relative; padding-left: 46px; margin-bottom: .9rem; }
.prose ol > li::before { content: counter(step); position: absolute; left: 0; top: 1px; width: 30px; height: 30px; display: grid; place-items: center; font-family: var(--mono); font-size: .85rem; font-weight: 700; background: var(--graphite-900); color: #fff; }
.prose ol > li p { margin: .5rem 0 0; }
.prose strong { color: var(--ink); }
.prose #key-terms + ul { list-style: none; padding: 0; border-top: 1px solid var(--line); }
.prose #key-terms + ul li { padding: 10px 0; margin: 0; border-bottom: 1px solid var(--line); font-size: .98rem; }
.prose #key-terms + ul strong { font-family: var(--mono); font-size: .9rem; color: var(--blue-ink); }
.prose #faq ~ h3 { padding-left: 14px; border-left: 3px solid var(--blue); }
.callout { border-left: 4px solid var(--blue); background: var(--blue-soft); padding: 12px 16px; margin: 0 0 1.1rem; }
.callout-safety { border-left-color: var(--warn-line); background: var(--warn-bg); }
.callout p { margin: 0; }
.callout-label { font-family: var(--mono); font-size: .78rem; letter-spacing: .1em; text-transform: uppercase; margin-right: 6px; }
blockquote { margin: 0 0 1.1rem; padding: 4px 0 4px 16px; border-left: 3px solid var(--line-2); color: var(--muted); }
.sources { border-top: 2px solid var(--graphite-900); margin-top: 40px; padding-top: 16px; }
.sources h2 { display: flex; gap: 10px; align-items: center; font-size: .82rem; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; margin: 0 0 10px; }
.sources ul { margin: 0 0 10px; padding-left: 1.2rem; }
.sources li { margin-bottom: 6px; }
a.ext::after { content: "\2197"; font-size: .8em; margin-left: 3px; text-decoration: none; display: inline-block; }
.independence { margin-top: 26px; background: var(--paper-2); border: 1px solid var(--line); padding: 14px 16px; }
.independence p { margin: 0; font-size: .92rem; }
.related h2 { border-bottom: 2px solid var(--graphite-900); padding-bottom: 10px; }
.related-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0 32px; }
.related-list li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.related-list h3 a { color: var(--ink); text-decoration: none; }
.related-list h3 a:hover { color: var(--blue-ink); text-decoration: underline; }
.related-list p:last-child { margin: 0; font-size: .95rem; }
@media (min-width: 900px) { .related-list { grid-template-columns: repeat(3, 1fr); } }

/* ---------- Search page ---------- */
.search-results-wrap { padding: 26px 0 64px; }
.search-status { font-weight: 600; color: var(--ink); min-height: 1.5em; }
.search-results { margin-bottom: 30px; }
.notice-inline { border: 1px solid var(--line-2); padding: 12px 14px; }

/* ---------- Doc pages ---------- */
.doc-layout { display: grid; gap: 30px; padding: 34px 0 64px; }
@media (min-width: 1000px) { .doc-layout { grid-template-columns: 240px minmax(0, 760px); gap: 52px; } .doc-layout .toc { position: sticky; top: 20px; align-self: start; } .doc-layout-single { grid-template-columns: minmax(0, 760px); } }
.doc-body section + section { margin-top: 10px; }
.doc-body h2 { font-size: 1.4rem; }
.byline { font-family: var(--mono); font-size: .8rem; color: var(--muted); margin: 0; }
.contact-layout { display: grid; gap: 30px; padding: 34px 0 64px; }
@media (min-width: 900px) { .contact-layout { grid-template-columns: 360px minmax(0, 1fr); align-items: start; gap: 52px; } }
.contact-card { border: 1.5px solid var(--graphite-900); padding: 20px 22px; }
.contact-card h2 { display: flex; gap: 10px; align-items: center; font-size: .82rem; font-family: var(--mono); letter-spacing: .12em; text-transform: uppercase; }
.contact-card p:last-child { margin: 0; font-size: .95rem; color: var(--muted); }
.email-big { display: inline-flex; gap: 10px; align-items: center; font-size: 1.15rem; font-weight: 700; word-break: break-word; }

/* ---------- Home: safety + independence ---------- */
.safety-panel { display: grid; gap: 24px; border: 1px solid var(--line-2); border-top: 4px solid var(--warn-line); padding: 24px; }
.safety-panel-head p:last-child { margin: 0; color: var(--muted); }
.safety-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.safety-grid li { display: flex; gap: 12px; align-items: flex-start; font-size: .97rem; }
.safety-grid .icon { width: 28px; height: 28px; color: var(--fix); }
@media (min-width: 700px) { .safety-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .safety-panel { grid-template-columns: 1fr 2fr; padding: 30px; } }
.ind-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 26px; align-items: center; }
.ind-grid p { max-width: 70ch; }
.ind-contact { border-left: 2px solid var(--blue); padding-left: 20px; }
.ind-contact p { margin: 0 0 6px; color: #b9c0cb; font-family: var(--mono); font-size: .8rem; letter-spacing: .1em; text-transform: uppercase; }
@media (min-width: 900px) { .ind-grid { grid-template-columns: 1.6fr 1fr; } }

/* ---------- Footer ---------- */
.site-footer { background: var(--graphite-950); color: #c3c9d2; padding: 48px 0 26px; border-top: 2px solid var(--blue); font-size: .95rem; }
.site-footer a { color: #e6e9ee; }
.site-footer a:hover { color: var(--blue-bright); }
.footer-grid { display: grid; gap: 30px; }
.footer-brand p { margin: 14px 0 0; max-width: 46ch; }
.footer-email { display: flex; gap: 8px; align-items: center; }
.footer-col h2 { color: #fff; font-family: var(--mono); font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; margin: 4px 0 12px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.footer-col a { text-decoration: none; }
.footer-col a:hover { text-decoration: underline; }
@media (min-width: 640px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-brand { grid-column: 1 / -1; } }
@media (min-width: 1000px) { .footer-grid { grid-template-columns: 1.4fr 1.3fr 1fr 1fr; } .footer-brand { grid-column: auto; } .footer-col-wide ul { grid-template-columns: 1fr; } }
.footer-base { border-top: 1px solid #2c313a; margin-top: 34px; padding-top: 18px; font-size: .86rem; color: #a3abb7; }
.footer-base p { margin: 0; max-width: 110ch; }

@media (max-width: 420px) {
  body { font-size: 16.5px; }
  .search-row .btn { padding: 11px 13px; }
  .search-row-icon { display: none; }
  .brand-word { font-size: 1.08rem; }
  .menu-toggle-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .guide-row-no { display: none; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; } }
@media print { .masthead, .site-footer, .toc, .related, .independence, .laser-line { display: none; } body { font-size: 12pt; } .prose ol > li::before { background: none; color: #000; border: 1px solid #000; } }
/* Diagrams inside articles keep their own list styling. */
.prose .diagram ol { padding-left: 0; margin-bottom: 0; }
.prose .diagram ol > li { padding-left: 0; margin-bottom: 0; }
.prose .diagram ol > li::before { content: none; }
.prose .diagram .path-cards li { padding: 12px 14px; }
.prose .diagram .process-steps li { padding-top: 12px; padding-bottom: 12px; }
.prose .diagram .conn-grid ul { padding-left: 18px; }