@font-face{font-family:Fraunces;src:url("../fonts/fraunces-600.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:Fraunces;src:url("../fonts/fraunces-700.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}
@font-face{font-family:Figtree;src:url("../fonts/figtree-400.woff2") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:Figtree;src:url("../fonts/figtree-500.woff2") format("woff2");font-weight:500;font-style:normal;font-display:swap}
@font-face{font-family:Figtree;src:url("../fonts/figtree-600.woff2") format("woff2");font-weight:600;font-style:normal;font-display:swap}
@font-face{font-family:Figtree;src:url("../fonts/figtree-700.woff2") format("woff2");font-weight:700;font-style:normal;font-display:swap}

:root{
  --paper:#f7f6f3;
  --paper-2:#eceae4;
  --white:#ffffff;
  --ink:#172033;
  --ink-soft:#2c384c;
  --muted:#5d6b80;
  --line:#e2e0d8;
  --accent:#1d4ed8;
  --accent-ink:#1e3a8a;
  --accent-soft:#e8eefc;
  --warn:#8a5a12;
  --warn-bg:#f8f1e4;
  --stop:#7d2e2e;
  --stop-bg:#f6e8e6;
  --shadow:none;
  --serif:"Fraunces","Iowan Old Style",Palatino,"Palatino Linotype",Georgia,serif;
  --sans:Figtree,"Segoe UI",sans-serif;
  --wrap:1120px;
  --measure:68ch;
  --header:72px;
  --radius:2px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:1.0625rem;
  line-height:1.7;
  overflow-x:clip;
}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{overflow-wrap:anywhere}
button,input,textarea{font:inherit;color:inherit}
a{color:var(--accent-ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
::selection{background:#dbe4fb}
.skip{
  position:absolute;left:12px;top:-40px;background:var(--ink);color:#fff;
  padding:8px 12px;z-index:80;border-radius:8px;
}
.skip:focus{top:12px}
.wrap{width:min(var(--wrap),calc(100% - 32px));margin-inline:auto}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

.topline{background:#10233f;color:#f4f7fb;font-size:.84rem;letter-spacing:.01em}
.topline p{margin:0;padding:8px 0}

.site-header{
  position:sticky;top:0;z-index:30;background:var(--paper);
  border-bottom:1px solid var(--line);
}
.site-header.is-stuck{border-bottom-color:var(--ink)}
.header-inner{display:flex;align-items:center;gap:12px;min-height:var(--header);min-width:0}
.logo{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-family:var(--serif);font-weight:600;font-size:1.35rem;letter-spacing:-.02em}
.logo-mark{flex:0 0 auto;color:var(--accent)}
.desktop-nav{display:none;align-items:center;gap:2px;margin-left:auto;min-width:0}
.desktop-nav a,.nav-btn{
  color:var(--ink);text-decoration:none;background:none;border:0;padding:8px 10px;
  border-radius:0;cursor:pointer;border-bottom:2px solid transparent;
}
.desktop-nav a:hover,.nav-btn:hover,.desktop-nav a[aria-current="page"]{background:transparent;color:var(--accent-ink);border-bottom-color:var(--accent)}
.drop{position:relative}
.drop-panel{
  position:absolute;top:calc(100% + 8px);left:0;min-width:280px;padding:8px;
  background:var(--white);
  border:1px solid var(--ink);border-radius:2px;box-shadow:none;
}
.drop-panel a{display:block;padding:10px 12px;border-radius:0;text-decoration:none;color:var(--ink);font-weight:600;text-shadow:none}
.drop-panel a:hover,.drop-panel a:focus-visible{background:var(--paper-2);color:var(--ink)}
.header-tools{display:flex;gap:6px;margin-left:auto}
.icon-btn{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);background:var(--white);
  display:grid;place-items:center;cursor:pointer;
}
.icon-btn:hover{border-color:var(--accent);color:var(--accent-ink)}
.header-search{border-top:1px solid var(--line);background:var(--white);padding:14px 0 16px}
.header-search form,.search-panel form{display:flex;gap:8px;align-items:center}
.header-search input,.search-panel input,.field input,.field textarea{
  width:100%;min-width:0;border:1px solid var(--line);background:var(--white);border-radius:12px;padding:12px 14px;
}
.search-results{
  margin-top:8px;background:var(--white);border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow);max-height:320px;overflow:auto;
}
.search-hit{display:flex;flex-direction:column;gap:2px;padding:12px 14px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line)}
.search-hit:last-child{border-bottom:0}
.search-hit:hover,.search-hit.is-active{background:var(--accent-soft)}
.search-kind{color:var(--accent-ink);font-size:.78rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.search-empty{margin:0;padding:14px;color:var(--muted)}

.drawer{
  position:fixed;inset:0;z-index:40;background:var(--white);overflow:auto;padding:18px 18px 48px;
}
.drawer-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.drawer nav{display:flex;flex-direction:column;gap:4px}
.drawer a{display:block;padding:12px 8px;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line);font-size:1.12rem}
.drawer .subhead{margin:18px 8px 6px;color:var(--muted);font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}

.page-home{
  background-color:#e7eefb;
  background-image:
    radial-gradient(920px 560px at 100% -8%, rgba(37,99,235,.18), transparent 58%),
    radial-gradient(720px 520px at -8% 12%, rgba(191,219,254,.7), transparent 60%),
    linear-gradient(rgba(37,99,235,.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.07) 1px, transparent 1px);
  background-size:auto, auto, 32px 32px, 32px 32px;
}
.page-home .site-header{background:rgba(247,246,243,.94)}
.page-home .hero{background:transparent;border-bottom:0}
.page-home .machine-section{background:transparent}
.hero{padding:48px 0 36px;border-bottom:1px solid var(--line);background:var(--white)}
.hero-split{display:grid;gap:28px;max-width:none;align-items:center}
.plate{
  margin:0;background:#fff;border:1px solid #d5e2f6;border-radius:18px;overflow:hidden;
  box-shadow:0 14px 36px rgba(23,32,51,.06);
}
.plate svg{
  display:block;width:100%;height:auto;background-color:#f4f8ff;
  background-image:linear-gradient(rgba(37,99,235,.09) 1px, transparent 1px),linear-gradient(90deg, rgba(37,99,235,.09) 1px, transparent 1px);
  background-size:22px 22px;
}
.plate-hero svg{max-height:440px;width:auto;max-width:100%;margin:0 auto}
.plate-card{display:flex;flex-direction:column}
.plate-card svg{width:100%;height:auto;margin:0}
.plate-card figcaption{margin-top:auto}
.plate-study svg{max-height:480px;width:auto;max-width:100%;margin:0 auto}
.explode-card svg{pointer-events:none}
.plate figcaption{padding:14px 16px 16px;color:var(--ink-soft);font-size:.95rem;background:#fff}
.plate figcaption strong{display:block;margin-bottom:4px;color:var(--ink);font-family:var(--serif);font-size:1.28rem;font-weight:600}
.diagram-lead{margin:0 0 10px;line-height:1.45}
.diagram-key,.diagram-names{list-style:none;margin:0;padding:0;counter-reset:part}
.diagram-key li,.diagram-names li{
  counter-increment:part;display:grid;grid-template-columns:22px minmax(0,1fr);gap:8px;align-items:start;margin:0 0 8px;line-height:1.35;
}
.diagram-key li:before,.diagram-names li:before{
  content:counter(part);width:22px;height:22px;border-radius:50%;background:#1d4ed8;color:#fff;
  font-size:.75rem;font-weight:700;line-height:22px;text-align:center;
}
.diagram-names{display:grid;grid-template-columns:1fr 1fr;column-gap:12px}
.diagram-names li{margin:0 0 6px;font-size:.92rem;color:var(--ink)}
.diagram-key b{color:var(--ink)}
.plate-open{display:inline-block;margin-top:8px;color:var(--accent-ink);font-weight:700;font-size:.92rem}
.explode-card{display:block;color:inherit;text-decoration:none;min-width:0;height:100%}
.explode-card .plate{height:100%;transition:border-color .15s ease, box-shadow .15s ease, transform .15s ease}
.explode-card:hover .plate{border-color:#1d4ed8;box-shadow:0 18px 40px rgba(29,78,216,.14);transform:translateY(-3px)}
.explode-grid{display:grid;gap:16px;align-items:stretch}
.machine-section{background:var(--paper)}
.section-intro{margin:-6px 0 18px}
.hero h1{font-size:clamp(2.1rem,1.4rem + 1.6vw,3.1rem);max-width:12em;line-height:1.08;margin-bottom:10px}
.hero-more{margin:14px 0 0;color:var(--muted)}
.hero-more a{font-weight:600}
.band{background:var(--ink);color:#f3efe6;padding:42px 0}
.band h2,.band h3{color:#f3efe6}
.band .problem-col{background:transparent;border-color:rgba(243,239,230,.28);color:#f3efe6}
.band .problem-col a{color:#f3efe6;border-top-color:rgba(243,239,230,.28)}
.band .problem-col a:hover{color:#f3c7bb}
.pager{display:grid;gap:12px;margin:28px 0 0}
.pager a{display:flex;flex-direction:column;gap:4px;padding:14px 0;border-top:1px solid var(--line);color:var(--ink);text-decoration:none;font-family:var(--serif);font-size:1.15rem}
.pager a span{font-family:var(--sans);font-size:.75rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.hero.has-photo,.page-hero.has-photo{
  background-color:#1c1915;
  color:#fff;
}
.hero.has-photo h1,.hero.has-photo .lede,.hero.has-photo .kicker,
.page-hero.has-photo h1,.page-hero.has-photo .lede,.page-hero.has-photo .kicker,
.page-hero.has-photo .meta-row,.page-hero.has-photo .crumbs,.page-hero.has-photo .crumbs a{color:#fff}
.hero.has-photo .kicker,.page-hero.has-photo .kicker{color:#d7f1ff}
.page-hero.has-photo .btn-ghost{border-color:#fff;color:#fff}
.hero-grid{display:grid;gap:28px;align-items:center}
.kicker{margin:0 0 8px;color:var(--accent-ink);font-weight:700;letter-spacing:.08em;text-transform:uppercase;font-size:.78rem}
h1,h2,h3{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;line-height:1.15;color:var(--ink)}
h1{font-size:clamp(1.7rem,1.15rem + 1.2vw,2.45rem);margin:0 0 14px;max-width:22em;line-height:1.15}
h2{font-size:clamp(1.4rem,1.1rem + .8vw,1.85rem);margin:1.7em 0 .45em}
h3{font-size:1.15rem;margin:1.15em 0 .35em}
h1,h2,h3,[id]{scroll-margin-top:calc(var(--header) + 16px)}
.lede{font-size:1.08rem;color:var(--ink-soft);margin:0 0 18px;max-width:var(--measure)}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.btn-light{background:#fff;color:var(--accent-ink)}
.btn-light:hover{background:var(--accent-soft)}
.hero.has-photo .btn-ghost,.page-hero.has-photo .btn-ghost{border-color:#fff;color:#fff}
.search-panel{position:relative;background:var(--white);border:1px solid #c9d4ea;border-radius:12px;padding:6px;box-shadow:0 8px 24px rgba(23,32,51,.06)}
.search-panel form{flex-wrap:nowrap}
.search-panel input{flex:1 1 auto;width:auto;min-width:0;border:0;background:transparent;font-size:1.05rem;padding:12px}
.search-panel .btn{flex:0 0 auto;width:auto}
.search-panel .search-results{position:absolute;left:0;right:0;top:calc(100% + 8px);z-index:5}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;min-height:36px;padding:6px 12px;border-radius:999px;background:var(--white);border:1px solid var(--line);color:var(--ink);text-decoration:none;font-size:.92rem}
.chip:hover{border-color:var(--accent);color:var(--accent-ink)}
.hero-media{border-radius:12px;overflow:hidden;aspect-ratio:16/11;background:var(--paper-2);border:1px solid var(--line);margin:0}
.hero-media img,.media img,.figure img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-caption{margin:8px 2px 0;color:var(--muted);font-size:.88rem}

.section{padding:48px 0}
.section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:18px}
.section-head h2{margin:0}
.section-head a{white-space:nowrap;font-weight:600}
.cat-grid,.guide-grid,.card-grid{display:grid;gap:18px}
.cat-card,.guide-card,.info-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  color:inherit;text-decoration:none;display:flex;flex-direction:column;min-width:0;
}
a.cat-card:hover,a.guide-card:hover{border-color:#9db4e8}
.media{aspect-ratio:16/10;background:var(--paper-2);overflow:hidden}
.cat-card > div:last-child,.guide-card > div:last-child,.pad{padding:16px 16px 18px}
.cat-card h3,.guide-card h3,.info-card h3{margin:8px 0 6px;font-size:1.2rem}
.cat-card p,.guide-card p,.info-card p{margin:0;color:var(--muted)}
.meta-row{display:flex;flex-wrap:wrap;gap:8px 12px;color:var(--muted);font-size:.88rem;margin:8px 0 0}
.pill{display:inline-flex;align-items:center;border-radius:999px;background:var(--accent-soft);color:var(--accent-ink);font-weight:700;font-size:.75rem;letter-spacing:.04em;text-transform:uppercase;padding:4px 8px}

.problem-grid{display:grid;gap:16px}
.problem-col{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:8px 16px 12px}
.problem-col h3{margin-bottom:4px}
.problem-col a{display:block;padding:12px 0;border-top:1px solid var(--line);color:var(--ink);text-decoration:none;line-height:1.35;overflow-wrap:anywhere}
.problem-col a:hover{color:var(--accent-ink)}

.crumbs{display:flex;flex-wrap:wrap;gap:6px;color:var(--muted);font-size:.92rem;margin:0 0 14px}
.crumbs a{color:var(--muted)}
.page-hero{
  padding:28px 0 18px;border-bottom:0;
  background-color:#eef3fb;
  background-image:linear-gradient(rgba(37,99,235,.06) 1px, transparent 1px),linear-gradient(90deg, rgba(37,99,235,.06) 1px, transparent 1px);
  background-size:28px 28px;
}
.page-hero h1{max-width:20em;font-size:clamp(1.7rem,1.15rem + 1.2vw,2.45rem)}
.prose{max-width:var(--measure);min-width:0}
.layout-article{display:grid;gap:28px;align-items:start}
.prose p,.prose li{color:var(--ink-soft)}
.prose p{max-width:var(--measure)}
.prose strong{color:var(--ink)}
.quick-answer{background:var(--white);border:1px solid #d5e2f6;border-left:4px solid var(--accent);border-radius:0 16px 16px 0;padding:16px 18px;margin:0 0 22px;box-shadow:0 10px 28px rgba(23,32,51,.05)}
.quick-answer h2{margin:0 0 8px;font-size:1.05rem}
.quick-answer p{margin:0;color:var(--ink)}
.figure{margin:22px 0}
.figure-frame{border-radius:18px;overflow:hidden;background:var(--paper-2);aspect-ratio:16/10}
.figure figcaption{color:var(--muted);font-size:.9rem;margin-top:8px}
.note{margin:18px 0;padding:14px 16px;background:var(--white);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:0 14px 14px 0}
.note.warn{background:var(--warn-bg);border-left-color:var(--warn)}
.note.stop{background:var(--stop-bg);border-left-color:var(--stop)}
.note p:first-child{margin-top:0}
.note p:last-child{margin-bottom:0}
.steps{list-style:none;padding:0;margin:12px 0 0;counter-reset:step}
.steps>li{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:14px 14px 8px 58px;margin:0 0 12px;position:relative}
.steps>li:before{
  counter-increment:step;content:counter(step, decimal-leading-zero);position:absolute;left:12px;top:14px;
  width:auto;height:auto;border-radius:0;background:transparent;color:var(--accent);
  display:block;font-family:var(--serif);font-weight:600;font-size:1.15rem;
}
.steps h3{margin-top:6px}
.table-wrap{overflow-x:auto;max-width:100%;margin:12px 0 18px;border:1px solid var(--line);border-radius:14px;background:var(--white)}
table{width:100%;border-collapse:collapse;min-width:520px}
th,td{text-align:left;padding:12px 14px;vertical-align:top;border-bottom:1px solid var(--line)}
th{background:var(--ink);color:#f3efe6;font-weight:600}
tr:last-child td{border-bottom:0}
.toc-mobile{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:10px 14px;margin:8px 0 16px}
.toc-mobile summary{cursor:pointer;font-weight:700}
.toc-desktop{display:none}
.toc a{display:block;color:var(--ink-soft);text-decoration:none;padding:7px 0;font-size:.95rem;border-bottom:1px solid var(--line)}
.toc a:hover{color:var(--accent-ink)}
.faq details{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:10px 14px;margin:0 0 8px}
.faq summary{cursor:pointer;font-weight:600}
.related{padding:10px 0 40px}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 16px}
.filter{
  display:inline-flex;align-items:center;min-height:40px;padding:6px 12px;border-radius:999px;
  border:1px solid var(--line);background:var(--white);color:var(--ink);text-decoration:none;
}
.filter[aria-current="true"],.filter:hover{background:var(--ink);border-color:var(--ink);color:#f3efe6}
.blog-search{margin:0 0 16px}
.blog-search input{width:100%;border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:var(--white)}
.empty-note{background:var(--white);border:1px dashed var(--line);border-radius:14px;padding:16px}

.form{display:grid;gap:14px;max-width:640px}
.hp{position:absolute;left:-10000px;width:1px;height:1px;overflow:hidden}
.field{display:grid;gap:6px}
.field label{font-weight:600}
.field-error{color:var(--stop);margin:0;font-size:.92rem}
.form-status{margin:0;padding:12px 14px;border-radius:12px}
.form-status.is-error{background:var(--stop-bg);color:var(--stop)}
.form-status.is-ok{background:var(--accent-soft);color:var(--accent-ink)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 16px;
  border-radius:12px;border:1px solid transparent;text-decoration:none;cursor:pointer;font-weight:700;
}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
button.btn-primary{width:fit-content}

.code-grid{display:grid;gap:12px}
.code-card{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.code-card h3{margin:0 0 6px}
.code-card p{margin:0;color:var(--ink-soft)}

.site-footer{background:#10233f;color:#e7eef8;padding:42px 0 18px;margin-top:20px}
.site-footer a{color:#ffffff}
.footer-grid{display:grid;gap:22px}
.site-footer h2{color:#fff;font-size:1rem;margin:0 0 10px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin:0 0 8px}
.legal-row{display:flex;flex-wrap:wrap;gap:10px 16px;border-top:1px solid rgba(255,255,255,.18);margin-top:22px;padding-top:14px;color:#d4ebf7;font-size:.92rem}
.back-top{
  position:fixed;right:16px;bottom:16px;z-index:25;border:0;border-radius:999px;
  background:var(--ink);color:#fff;min-height:44px;padding:10px 14px;cursor:pointer;box-shadow:var(--shadow);
}

@media (max-width:359px){
  .wrap{width:calc(100% - 24px)}
  h1{font-size:1.7rem}
  .steps>li{padding:12px 12px 8px 48px}
  .steps>li:before{width:auto;height:auto;left:10px;font-size:.95rem}
}
@media (max-width:767px){
  .search-panel form,.header-search form{flex-direction:column;align-items:stretch}
  .search-panel input{width:100%}
  .search-panel .btn,.header-search .btn,.hero-actions .btn{width:100%}
  .section-head{flex-direction:column;align-items:flex-start}
  .section{padding:32px 0}
  .hero.has-photo{padding:36px 0 40px}
  .hero-media{display:none}
  .hero h1{max-width:16em}
  table{min-width:28rem}
}
@media (min-width:768px){
  .cat-grid,.guide-grid,.problem-grid,.code-grid,.card-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
}
@media (min-width:1024px){
  .hero-split{grid-template-columns:minmax(0,1fr) minmax(320px,.92fr);gap:40px}
  .explode-grid{grid-template-columns:1fr 1fr}
  .plate-study{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(260px,.85fr);align-items:center}
  .plate-study figcaption{padding:22px 22px 22px 8px}
  .pager{grid-template-columns:1fr 1fr}
  .pager-next{text-align:right}
  .section{padding:56px 0}
  .guide-grid.cols-3,.card-grid{grid-template-columns:repeat(3,1fr)}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
  .problem-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .layout-article{grid-template-columns:minmax(0,var(--measure)) 220px;gap:32px;justify-content:center}
  .toc-mobile{display:none}
  .toc-desktop{
    display:block;position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;
    padding:4px 0 8px 16px;border-left:1px solid var(--line);
  }
  .toc-desktop p{margin:0 0 8px;font-size:.78rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
}
@media (min-width:1280px){
  .explode-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .desktop-nav{display:flex}
  .desktop-nav a,.nav-btn{padding:8px 8px;font-size:.95rem}
  .header-tools{margin-left:8px}
  .menu-btn{display:none}
  .hero.has-photo{padding:64px 0 72px}
  .hero-grid{grid-template-columns:minmax(0,70ch)}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}
}
@media (min-width:1440px){
  :root{--wrap:1180px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}
.guide-card[hidden],.filter[hidden],.search-results[hidden],.drawer[hidden],.header-search[hidden],.drop-panel[hidden],.back-top[hidden],.empty-note[hidden]{display:none !important}