/* PhysCAD.io — "Blueprint / graphite" theme.
   Pages are laid out as drawing sheets on a gridded, near-black table.
   Orange is the accent; blue only appears in small technical notes. */

@font-face { font-family: Archivo; font-weight: 400; font-display: swap; src: url(../fonts/archivo-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: Archivo; font-weight: 500; font-display: swap; src: url(../fonts/archivo-latin-500-normal.woff2) format("woff2"); }
@font-face { font-family: Archivo; font-weight: 600; font-display: swap; src: url(../fonts/archivo-latin-600-normal.woff2) format("woff2"); }
@font-face { font-family: Archivo; font-weight: 700; font-display: swap; src: url(../fonts/archivo-latin-700-normal.woff2) format("woff2"); }
@font-face { font-family: Archivo; font-weight: 800; font-display: swap; src: url(../fonts/archivo-latin-800-normal.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 400; font-display: swap; src: url(../fonts/jetbrains-mono-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 500; font-display: swap; src: url(../fonts/jetbrains-mono-latin-500-normal.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 700; font-display: swap; src: url(../fonts/jetbrains-mono-latin-700-normal.woff2) format("woff2"); }

:root {
  /* core palette */
  --ink: #0f0f10;              /* page / drafting table */
  --sheet: #1f1f22;            /* sheets sit on top of the table */
  --sheet-2: #26262a;          /* raised areas inside a sheet */
  --well: #161618;             /* inset areas (inputs, image wells) */
  --rule: rgba(200,200,205,.13);
  --rule-2: rgba(200,200,205,.26);
  --text: #ededee;
  --text-2: #b3b3b8;
  --muted: #7c7c83;
  --orange: #f59e42;
  --orange-2: #ffb15e;
  --blue: #5b9bff;
  --green: #57d9a3;
  --red: #f0645c;
  --font: Archivo, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --wrap: 1200px;
  --pad: 48px;

  /* aliases used by admin.css and older markup */
  --bg: var(--ink);
  --bg-2: var(--well);
  --panel: var(--sheet);
  --panel-2: var(--sheet-2);
  --border: var(--rule-2);
  --border-2: rgba(200,200,205,.38);
  --blue-2: var(--blue);
  --blue-dim: rgba(91,155,255,.12);
  --orange-dim: rgba(245,158,66,.12);
  --on-accent: #1a0f03;        /* text on an accent-coloured button */
  --radius: 4px;
  --radius-sm: 4px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; overflow-x: clip; color: var(--text); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased;
  background-color: var(--ink);
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px), linear-gradient(90deg, var(--rule) 1px, transparent 1px),
    linear-gradient(rgba(200,200,205,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(200,200,205,.045) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  background-position: -1px -1px;
}
a { color: var(--text); text-decoration: none; }
a:hover { color: var(--orange); }
img, video { display: block; max-width: 100%; height: auto; }
h1, h2, h3, h4 { margin: 0; line-height: 1.05; letter-spacing: -.02em; font-weight: 800; }
h1 { font-size: clamp(2.8rem, 8vw, 6.4rem); }
h2 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
h3 { font-size: 1.3rem; line-height: 1.2; }
p { margin: 0 0 1em; }
.wrap { width: min(var(--wrap), 100% - 32px); margin: 0 auto; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.o { color: var(--orange); }
.label { font-family: var(--mono); font-size: .75rem; letter-spacing: .12em; text-transform: uppercase; color: var(--orange); display: inline-block; }
.label.dim { color: var(--muted); }
.spec { font-family: var(--mono); font-size: .75rem; color: var(--blue); }
code, kbd { font-family: var(--mono); font-size: .88em; background: var(--well); border: 1px solid var(--rule-2); padding: .1em .4em; border-radius: 3px; }
pre { background: var(--well); border: 1px solid var(--rule-2); padding: 16px; overflow: auto; }
pre code { background: none; border: 0; padding: 0; }
hr { border: 0; border-top: 1px solid var(--rule-2); margin: 32px 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 12px 22px;
  font: 700 .95rem/1.2 var(--font); border-radius: 4px; border: 0; cursor: pointer; white-space: nowrap;
  background: transparent; color: var(--text); box-shadow: inset 0 0 0 1.5px var(--rule-2); transition: .15s;
}
.btn:hover { color: var(--text); box-shadow: inset 0 0 0 1.5px var(--text-2); }
.btn-primary, .btn-orange { background: var(--orange); color: var(--on-accent); box-shadow: none; }
.btn-primary:hover, .btn-orange:hover { background: var(--orange-2); color: var(--on-accent); box-shadow: none; }
.btn-ghost { box-shadow: none; }
.btn-sm { padding: 8px 14px; font-size: .85rem; }
.btn-lg { padding: 15px 28px; font-size: 1.02rem; }
.btn svg { width: 18px; height: 18px; }
.btn[disabled], .btn.off { opacity: .45; pointer-events: none; }

/* ---------- Nav ---------- */
.announce { background: var(--orange); color: var(--on-accent); text-align: center; font: 600 .85rem/1.4 var(--mono); padding: 8px 16px; }
.announce a { color: var(--on-accent); text-decoration: underline; }
.nav { position: sticky; top: 0; z-index: 50; background: rgba(15,15,16,.88); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom: 1px solid var(--rule-2); }
.nav-inner { display: flex; align-items: center; gap: 32px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; letter-spacing: -.01em; color: var(--text); }
.brand:hover { color: var(--text); }
.brand img, .brand svg { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 26px; flex: 1; font: 500 .8rem/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.nav-links a { color: var(--text-2); padding: 6px 0; }
.nav-links a:hover, .nav-links a.on { color: var(--text); }
.nav-links a.on::before { content: "▸ "; color: var(--orange); }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; width: 40px; height: 40px; background: transparent; border: 1px solid var(--rule-2); border-radius: 4px; flex-direction: column; justify-content: center; align-items: center; gap: 4px; cursor: pointer; }
.nav-toggle span { display: block; width: 16px; height: 2px; background: var(--text); }
@media (max-width: 900px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; padding: 8px 16px 16px; background: var(--ink); border-bottom: 1px solid var(--rule-2); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .nav-toggle { display: flex; }
}

/* ---------- Flash ---------- */
.flash { margin: 20px 0 0; padding: 12px 16px; border: 1px solid var(--rule-2); border-left: 3px solid var(--blue); background: var(--sheet); font-size: .95rem; }
.flash-success { border-left-color: var(--green); }
.flash-error { border-left-color: var(--red); }

/* ---------- Sheets (drawing-sheet panels with orange corner brackets) ---------- */
.sheet {
  position: relative; margin: 40px 0; border: 1.5px solid var(--rule-2); background-color: var(--sheet);
  box-shadow: 0 24px 60px -24px rgba(0,0,0,.8);
  --c: var(--orange);
  background-image:
    linear-gradient(var(--c), var(--c)), linear-gradient(var(--c), var(--c)),
    linear-gradient(var(--c), var(--c)), linear-gradient(var(--c), var(--c)),
    linear-gradient(var(--c), var(--c)), linear-gradient(var(--c), var(--c)),
    linear-gradient(var(--c), var(--c)), linear-gradient(var(--c), var(--c));
  background-repeat: no-repeat;
  background-size: 14px 2px, 2px 14px, 14px 2px, 2px 14px, 14px 2px, 2px 14px, 14px 2px, 2px 14px;
  background-position: left top, left top, right top, right top, left bottom, left bottom, right bottom, right bottom;
}
.sheet + .sheet { margin-top: 32px; }
.pad { padding: var(--pad); }
.pad-x { padding-left: var(--pad); padding-right: var(--pad); }
.pad-t { padding-top: var(--pad); }
.rb { border-bottom: 1px solid var(--rule-2); }
.rt { border-top: 1px solid var(--rule-2); }
@media (max-width: 760px) { :root { --pad: 24px; } .sheet { margin: 24px 0; } }

/* Sheet header row: big title left, sheet number right */
.sec-head { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; padding: 36px var(--pad) 22px; border-bottom: 1.5px solid var(--rule-2); }
.sec-head p { margin: 10px 0 0; color: var(--text-2); max-width: 620px; }
@media (max-width: 760px) { .sec-head { flex-direction: column; gap: 10px; } }

/* ---------- Hero ---------- */
.hero { padding: 64px var(--pad) 0; }
.hero h1 { max-width: 12ch; margin-top: 18px; }
.hero h1 .o { display: block; }
.lede { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; margin-top: 28px; align-items: end; }
.lede p { margin: 0; font-size: 1.2rem; color: var(--text-2); max-width: 560px; }
.lede .actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
.page-hero { padding: 56px var(--pad) 40px; }
.page-hero h1 { font-size: clamp(2.4rem, 6vw, 4.6rem); margin-top: 16px; max-width: 16ch; }
.page-hero p { margin: 22px 0 0; font-size: 1.15rem; color: var(--text-2); max-width: 640px; }
@media (max-width: 900px) { .lede { grid-template-columns: 1fr; gap: 24px; } .lede .actions { justify-content: flex-start; } .hero { padding-top: 40px; } }

/* dimension line */
.dimline { display: flex; align-items: center; gap: 12px; margin: 48px 0 18px; font: .78rem var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.dimline::before, .dimline::after { content: ""; height: 1px; flex: 1; background: var(--rule-2); }
.dimline b { color: var(--blue); font-weight: 500; }

/* screenshot + numbered callouts */
.shot { position: relative; }
.shot img, .shot video { border: 1.5px solid var(--rule-2); width: 100%; }
.hero .shot img, .hero .shot video { border-bottom: 0; }
.callout { position: absolute; z-index: 2; transform: translate(-50%, -50%); font: .78rem var(--mono); color: var(--text); background: var(--ink); border: 1px solid var(--orange); padding: 6px 10px; white-space: nowrap; }
.callout::after { content: ""; position: absolute; background: var(--orange); }
.callout.p-right::after { left: 100%; top: 50%; width: var(--len, 60px); height: 1px; }
.callout.p-left::after  { right: 100%; top: 50%; width: var(--len, 60px); height: 1px; }
.callout.p-up::after    { bottom: 100%; left: 50%; height: var(--len, 60px); width: 1px; }
.callout.p-down::after  { top: 100%; left: 50%; height: var(--len, 60px); width: 1px; }
.callout.p-none::after  { display: none; }
.zoom { cursor: zoom-in; }
@media (max-width: 760px) { .callout { display: none; } }

/* ---------- Title block (row of labelled cells) ---------- */
.titleblock { display: grid; grid-template-columns: 2fr repeat(3, 1fr); border-top: 1.5px solid var(--rule-2); }
.titleblock > div { padding: 22px 26px; border-right: 1px solid var(--rule-2); }
.titleblock > div:last-child { border-right: 0; }
.tb-k { display: block; margin-bottom: 6px; font: .68rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.tb-v { font-size: 1.05rem; font-weight: 600; }
.tb-big { font-size: 1.35rem; font-weight: 700; line-height: 1.35; }
.tb-big b { color: var(--orange); font-weight: 700; }
@media (max-width: 900px) {
  .titleblock { grid-template-columns: 1fr 1fr; }
  .titleblock > div:first-child { grid-column: 1 / -1; border-right: 0; border-bottom: 1px solid var(--rule-2); }
  .titleblock > div:nth-child(3) { border-right: 0; }
}

/* ---------- Ruled cell grids ---------- */
.cells { display: grid; grid-template-columns: repeat(3, 1fr); }
.cells.c2 { grid-template-columns: repeat(2, 1fr); }
.cells.c4 { grid-template-columns: repeat(4, 1fr); }
.cell { padding: 30px; border-right: 1px solid var(--rule-2); border-bottom: 1px solid var(--rule-2); min-width: 0; }
.cells > .cell:nth-child(3n) { border-right: 0; }
.cells.c2 > .cell:nth-child(3n) { border-right: 1px solid var(--rule-2); }
.cells.c2 > .cell:nth-child(2n) { border-right: 0; }
.cells.c4 > .cell:nth-child(3n) { border-right: 1px solid var(--rule-2); }
.cells.c4 > .cell:nth-child(4n) { border-right: 0; }
.cells.last-row-open > .cell:nth-last-child(-n+3) { border-bottom: 0; }
.cell h3 { margin-bottom: 8px; }
.cell p { margin: 0; color: var(--text-2); font-size: .97rem; }
.cell .spec { margin-top: 14px; display: block; }
.num { width: 34px; height: 34px; border-radius: 50%; border: 1.5px solid var(--orange); color: var(--orange); font: 700 .85rem var(--mono); display: grid; place-items: center; margin-bottom: 18px; }
.cell .icon { width: 30px; height: 30px; color: var(--text); margin-bottom: 16px; }
.cell .icon svg { width: 100%; height: 100%; }
a.cell { color: inherit; display: block; transition: background .15s; }
a.cell:hover { background: var(--sheet-2); color: inherit; }
@media (max-width: 900px) {
  .cells, .cells.c4 { grid-template-columns: 1fr 1fr; }
  .cells > .cell, .cells.c4 > .cell { border-right: 1px solid var(--rule-2) !important; }
  .cells > .cell:nth-child(2n), .cells.c4 > .cell:nth-child(2n) { border-right: 0 !important; }
}
@media (max-width: 640px) {
  .cells, .cells.c2, .cells.c4 { grid-template-columns: 1fr; }
  .cell { border-right: 0 !important; padding: 24px; }
}

/* ---------- Split: text + picture ---------- */
.split { display: grid; grid-template-columns: 1fr 1.3fr; border-bottom: 1px solid var(--rule-2); }
.split:last-child { border-bottom: 0; }
.split.flip { grid-template-columns: 1.3fr 1fr; }
.split.flip .txt { order: 2; border-right: 0; border-left: 1px solid var(--rule-2); }
.split .txt { padding: 44px; border-right: 1px solid var(--rule-2); }
.split .txt h3 { font-size: clamp(1.6rem, 2.6vw, 2rem); margin: 10px 0 14px; }
.split .txt p { color: var(--text-2); }
.split .txt ul { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; font: .85rem/1.5 var(--mono); color: var(--text-2); }
.split .txt li::before { content: "— "; color: var(--orange); }
.split .pic { padding: 28px; display: grid; place-items: center; background: rgba(0,0,0,.2); }
.split .pic img, .pic video { border: 1px solid var(--rule-2); }
.split .pic.pair { grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 900px) {
  .split, .split.flip { grid-template-columns: 1fr; }
  .split .txt, .split.flip .txt { order: 0; border: 0; border-bottom: 1px solid var(--rule-2); padding: 28px; }
  .split .pic { padding: 20px; }
}

/* ---------- Pricing block ---------- */
.price { display: grid; grid-template-columns: 1.1fr 1fr; }
.price .left { padding: var(--pad); border-right: 1px solid var(--rule-2); }
.amount { font-size: clamp(3.6rem, 8vw, 5.6rem); font-weight: 800; letter-spacing: -.04em; line-height: 1; margin: 14px 0 10px; }
.amount sup { font-size: .35em; vertical-align: top; position: relative; top: .5em; color: var(--muted); margin-right: 2px; }
.price .left p { color: var(--text-2); }
.rows { display: grid; align-content: start; }
.row { display: flex; justify-content: space-between; gap: 16px; padding: 18px 28px; border-bottom: 1px solid var(--rule-2); }
.row:last-child { border-bottom: 0; }
.row > span:first-child { color: var(--text-2); }
.row > span:last-child { font-family: var(--mono); text-align: right; }
.row .y { color: var(--green); }
#shopify-buy, .shopify-buy { min-height: 52px; margin-top: 8px; }
.buy-fallback { border: 1px dashed var(--rule-2); padding: 16px; color: var(--text-2); font-size: .92rem; }
@media (max-width: 900px) { .price { grid-template-columns: 1fr; } .price .left { border-right: 0; border-bottom: 1px solid var(--rule-2); } .row { padding: 16px 24px; } }

/* comparison table */
.compare { width: 100%; border-collapse: collapse; font-size: .95rem; }
.compare th, .compare td { padding: 14px 20px; border-bottom: 1px solid var(--rule-2); border-right: 1px solid var(--rule); text-align: left; }
.compare th:last-child, .compare td:last-child { border-right: 0; }
.compare tr:last-child td { border-bottom: 0; }
.compare th { font: 500 .7rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.compare td.hi { color: var(--orange); font-weight: 700; }
.compare td.y { color: var(--green); font-family: var(--mono); font-size: .88rem; }
.compare td.n { color: var(--muted); font-family: var(--mono); font-size: .88rem; }
.scroll-x { overflow-x: auto; }

/* ---------- Download cells ---------- */
.dl { display: flex; flex-direction: column; gap: 10px; }
.dl .btn { margin-top: 14px; }
.dl .ver { font: .78rem var(--mono); color: var(--muted); }
.dl .sha { font: .68rem/1.5 var(--mono); color: var(--muted); word-break: break-all; }
.dl.here { background: var(--sheet-2); }
.dl.here .label.dim::after { content: " · your system"; color: var(--orange); }
.steps { counter-reset: s; list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.steps li { display: grid; grid-template-columns: 28px 1fr; gap: 14px; align-items: start; color: var(--text-2); }
.steps li > span { padding-top: 2px; }
.steps strong { color: var(--text); }
.steps li::before { counter-increment: s; content: counter(s); width: 28px; height: 28px; border-radius: 50%; border: 1.5px solid var(--orange); color: var(--orange); font: 700 .8rem var(--mono); display: grid; place-items: center; }

/* ---------- Blog ---------- */
.post-row { display: grid; grid-template-columns: 160px 1fr 260px; gap: 32px; padding: 28px var(--pad); border-bottom: 1px solid var(--rule-2); color: inherit; transition: background .15s; }
.post-row:last-child { border-bottom: 0; }
.post-row:hover { background: var(--sheet-2); color: inherit; }
.post-row .date { font: .78rem var(--mono); color: var(--muted); padding-top: 6px; }
.post-row h3 { font-size: 1.5rem; margin-bottom: 8px; }
.post-row p { margin: 0; color: var(--text-2); }
.post-row img { border: 1px solid var(--rule-2); aspect-ratio: 16/10; object-fit: cover; width: 100%; }
@media (max-width: 860px) { .post-row { grid-template-columns: 1fr; gap: 10px; padding: 24px; } }

/* ---------- Prose (CMS pages & posts) ---------- */
.prose { max-width: 740px; }
.prose h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); margin-bottom: .5em; }
.prose h2 { font-size: 1.7rem; margin: 1.8em 0 .5em; }
.prose h3 { font-size: 1.2rem; margin: 1.6em 0 .4em; }
.prose p, .prose li { color: var(--text-2); font-size: 1.05rem; }
.prose a { color: var(--orange); text-decoration: underline; text-underline-offset: 3px; }
.prose img { border: 1px solid var(--rule-2); margin: 24px 0; }
.prose blockquote { margin: 24px 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--orange); color: var(--text-2); }
.prose ul { padding-left: 1.2em; }
.prose li::marker { color: var(--orange); }

/* ---------- Forms & tables ---------- */
.form { display: grid; gap: 14px; max-width: 520px; }
label { display: grid; gap: 6px; font-size: .88rem; font-weight: 500; color: var(--text-2); }
input, textarea, select {
  width: 100%; font: inherit; color: var(--text); background: var(--well); border: 1px solid var(--rule-2); border-radius: 4px; padding: 11px 12px;
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--orange); box-shadow: 0 0 0 3px var(--orange-dim); }
input[type=checkbox] { width: auto; accent-color: var(--orange); }
input.mono, .mono input { font-family: var(--mono); letter-spacing: .03em; }
.inline { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.key { display: inline-block; font: 500 1.1rem var(--mono); letter-spacing: .06em; background: var(--well); border: 1px solid var(--rule-2); padding: 12px 16px; }
.table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.table th, .table td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--rule-2); vertical-align: top; }
.table th { font: 500 .7rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.pill { display: inline-block; padding: 2px 8px; border: 1px solid var(--rule-2); border-radius: 3px; font: 500 .7rem var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--text-2); }
.pill.green { color: var(--green); border-color: rgba(87,217,163,.45); }
.pill.red { color: var(--red); border-color: rgba(240,100,92,.45); }
.pill.blue { color: var(--blue); border-color: color-mix(in srgb, var(--blue) 45%, transparent); }
.pill.orange { color: var(--orange); border-color: color-mix(in srgb, var(--orange) 50%, transparent); }

/* ---------- Footer ---------- */
.footer { margin-top: 56px; border-top: 1px solid var(--rule-2); background: rgba(15,15,16,.9); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding: 48px 0 32px; }
.footer h4 { font: 500 .7rem var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.footer a:not(.brand) { display: block; padding: 4px 0; color: var(--text-2); font-size: .95rem; }
.footer a:not(.brand):hover { color: var(--orange); }
.footer p { color: var(--muted); font-size: .92rem; max-width: 380px; margin: 14px 0 0; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; padding: 18px 0 40px; border-top: 1px solid var(--rule); font: .72rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }

/* ---------- Error page ---------- */
.errpage { text-align: center; padding: 96px var(--pad); }
.errpage .code { font: 700 5.5rem/1 var(--mono); color: var(--orange); margin-bottom: 18px; }

/* ---------- Lightbox ---------- */
.lb { position: fixed; inset: 0; z-index: 100; display: none; place-items: center; padding: 24px; background: rgba(0,0,0,.88); cursor: zoom-out; }
.lb.open { display: grid; }
.lb img, .lb video { max-width: min(1400px, 100%); max-height: 100%; border: 1px solid var(--rule-2); }

/* ======================================================================
   Block grid (pages built in the visual editor)
   Each sheet holds a 12-column grid. Rules between blocks are drawn with
   box-shadows so any mix of widths gets clean drafting lines.
   ====================================================================== */
.bgrid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); overflow: hidden; }
.blk { min-width: 0; box-shadow: 1px 0 0 var(--rule-2), 0 1px 0 var(--rule-2), 1px 1px 0 var(--rule-2); }
.sheet-plain { border-color: transparent; background: transparent; box-shadow: none; --c: transparent; }
.sheet-plain .blk { box-shadow: none; }
.span-2 { grid-column: span 2; } .span-3 { grid-column: span 3; } .span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; } .span-6 { grid-column: span 6; } .span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; } .span-9 { grid-column: span 9; } .span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; } .span-12 { grid-column: span 12; }
@media (max-width: 900px) {
  .span-2, .span-3, .span-4, .span-5, .span-6 { grid-column: span 6; }
  .span-7, .span-8, .span-9, .span-10, .span-11, .span-12 { grid-column: span 12; }
}
@media (max-width: 640px) { .bgrid > .blk { grid-column: span 12; } }

/* block internals */
.blk-heading .sec-head { border-bottom: 0; }
.blk-titleblock .titleblock { border-top: 0; height: 100%; }
.blk .cell { border: 0 !important; height: 100%; }
.cell-txt { padding: 44px; }
.cell-txt.size-lg h3 { font-size: clamp(1.6rem, 2.6vw, 2rem); margin: 10px 0 14px; }
.cell-txt.size-md h3 { font-size: 1.3rem; margin: 10px 0 10px; }
.cell-txt .label + h3 { margin-top: 10px; }
.cell-txt > h3:first-child { margin-top: 0; }
.rich { color: var(--text-2); }
.rich p { margin: 0 0 1em; }
.rich > :last-child { margin-bottom: 0; }
.rich a { color: var(--orange); text-decoration: underline; text-underline-offset: 3px; }
.rich ul, .rich ol { padding-left: 1.2em; } .rich li::marker { color: var(--orange); }
.rich h3, .rich h4 { color: var(--text); margin: 1.2em 0 .4em; }
ul.dash { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; font: .85rem/1.5 var(--mono); color: var(--text-2); }
ul.dash li::before { content: "— "; color: var(--orange); }
.pic { margin: 0; height: 100%; display: grid; place-items: center; align-content: center; }
.pic-well { background: rgba(0,0,0,.2); }
.pic img, .pic video { border: 1px solid var(--rule-2); width: 100%; }
.pic .shot { width: 100%; }
.pic-bleed img, .pic-bleed video { border: 0; }
.pic figcaption { margin-top: 10px; font: .75rem var(--mono); color: var(--muted); text-align: center; }
.gallery { display: grid; gap: 16px; grid-template-columns: repeat(var(--cols, 2), 1fr); }
.price-left { padding: var(--pad); }
.price-left p { color: var(--text-2); }
.price-left .fine { margin: 16px 0 0; }
.blk-rows .rows { height: 100%; }
.ed-img-placeholder { display: grid; place-items: center; min-height: 160px; width: 100%; border: 1px dashed var(--rule-2); color: var(--muted); font: .8rem var(--mono); }
@media (max-width: 900px) { .cell-txt { padding: 28px; } }

/* optional black frame (hero / image / image group). --fr-w thickness in tenths of a percent of the
   picture's own width (so every picture gets the same look at any size), --fr-pad space around it */
.fr-box { --fr-k: 1; padding: calc(var(--fr-pad, 0px) * var(--fr-k)); }
.fr-on img, .fr-on video { border: 0 !important; box-sizing: border-box; background: #000; padding: calc(var(--fr-w, 0) * .1%);
  border-radius: calc(var(--fr-w, 0) * .1% + 1%) / calc((var(--fr-w, 0) * .1% + 1%) * 1.6); }
.fr-on .ed-img-placeholder { border: 6px solid #000; border-radius: 10px; background: rgba(0,0,0,.6); }
@media (max-width: 900px) { .fr-box { --fr-k: .6; } }

/* ---- roll-over: subtle hover on boxes ---------------------------------------
   Cards light up a touch, orange drafting corner ticks draw in, numbers fill. */
.cell, .titleblock > div, .row, .pic { transition: background-color .25s ease; }
.cell { position: relative; }
.cell::before, .cell::after { content: ""; position: absolute; width: 14px; height: 14px; pointer-events: none; opacity: 0; transition: opacity .25s ease, transform .3s cubic-bezier(.2,.7,.2,1); }
.cell::before { top: 10px; left: 10px; border-top: 1.5px solid var(--orange); border-left: 1.5px solid var(--orange); transform: translate(6px, 6px); }
.cell::after { right: 10px; bottom: 10px; border-bottom: 1.5px solid var(--orange); border-right: 1.5px solid var(--orange); transform: translate(-6px, -6px); }
.cell:hover { background-color: rgba(255,255,255,.025); }
.cell:hover::before, .cell:hover::after { opacity: 1; transform: none; }
.num { transition: background-color .25s ease, color .25s ease; }
.cell:hover .num { background: var(--orange); color: var(--on-accent); }
.cell h3 { transition: color .25s ease; }
.cell .spec { transition: letter-spacing .3s ease; }
.cell:hover .spec { letter-spacing: .02em; }
.titleblock > div:hover { background-color: rgba(255,255,255,.025); }
.titleblock .tb-k { transition: color .25s ease; }
.titleblock > div:hover .tb-k { color: var(--orange); }
.row:hover { background-color: rgba(255,255,255,.025); }
.row > span:first-child { transition: color .25s ease, transform .25s ease; }
.row:hover > span:first-child { color: var(--text); transform: translateX(3px); }
.pic .zoom { transition: filter .3s ease; }
.pic .zoom:hover, .hero .shot .zoom:hover { filter: brightness(1.06); }
.hero .shot .zoom { transition: filter .3s ease; }
@media (hover: none) { .cell::before, .cell::after { display: none; } }
@media (prefers-reduced-motion: reduce) {
  .cell, .cell::before, .cell::after, .num, .row, .row > span:first-child, .titleblock > div, .pic .zoom { transition: none !important; }
  .row:hover > span:first-child { transform: none; }
}

/* looping videos (MP4/WebM used like an animated GIF) */
video[data-loop] { width: 100%; background: #000; }
.lb video { display: none; } .lb.is-video video { display: block; } .lb.is-video img { display: none; }

/* ---- PCBPA pages: the drawing table becomes a circuit board ------------------
   Same sheets and type; the gridded table is swapped for solder mask with traces,
   vias and pads (assets/img/pcb-bg.svg, a seamless 480px tile). */
body.theme-pcb {
  --ink: #101011;
  background-color: var(--ink);
  background-image:
    radial-gradient(rgba(200,200,205,.05) 1px, transparent 1.4px),
    url(../img/pcb-bg.svg);
  background-size: 24px 24px, 480px 480px;
  background-position: 12px 12px, 0 0;
}
.theme-pcb .sheet { box-shadow: 0 24px 60px -24px rgba(0,0,0,.85); }
.theme-pcb .nav { background-color: rgba(16,16,17,.88); }

/* owner discount box */
.owner-disc { padding: var(--pad); height: 100%; display: flex; flex-direction: column; gap: 10px; }
.owner-disc h3 { margin: 4px 0 0; }
.owner-disc p { margin: 0; color: var(--text-2); }
.od-price { font: 600 1.05rem var(--mono); display: flex; align-items: baseline; gap: 10px; }
.od-price s { color: var(--muted); font-weight: 400; }
.od-price b { color: var(--orange); font-size: 1.6rem; }
.od-pct { font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--on-accent); background: var(--orange); padding: 2px 6px; border-radius: 2px; }
.od-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; margin-top: 8px; }
.od-form input { width: 100%; min-width: 0; background: var(--well); border: 1.5px solid var(--rule-2); color: var(--text); padding: 12px 14px; font: 500 .95rem var(--mono); letter-spacing: .04em; border-radius: 4px; }
.od-form input:focus { outline: none; border-color: var(--orange); }
.od-msg { color: var(--red) !important; font-size: .92rem; border-left: 2px solid var(--red); padding-left: 10px; }
.owner-disc .fine { margin-top: 4px !important; }
/* Downloads before a license key is entered: the key box in place of the buttons. */
.dl-lock { grid-column: 1 / -1; padding: var(--pad); display: flex; flex-direction: column; gap: 12px; }
.dl-lock > * { max-width: 640px; }
.dl-lock .icon { color: var(--orange); }
.dl-lock h3 { margin: 4px 0 0; }
.dl-lock p { margin: 0; color: var(--text-2); }
.dl-lock .inline { margin-top: 6px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (max-width: 640px) { .od-form { grid-template-columns: 1fr; } }

/* ---- Product colours ---------------------------------------------------------
   PCBPA: orange leads, blue for small technical notes (the original scheme).
   PhysCAD: the reverse — blue leads, orange for the small notes. Every rule uses
   var(--orange) for "the lead colour" and var(--blue) for "the note colour", so
   swapping the two values here recolours the whole PhysCAD half of the site. */
body.site-physcad {
  --orange: #5b9bff;
  --orange-2: #84b4ff;
  --orange-dim: rgba(91,155,255,.14);
  --blue: #f59e42;
  --blue-2: #f59e42;
  --blue-dim: rgba(245,158,66,.12);
  --on-accent: #06142e;
}

/* ---- Header: PhysCAD logo (left) and PCBPA logo (right) are each product's home ---- */
/* both logos the same size; PCBPA's sits a little away from the Buy button */
.nav-cta .brand { margin-right: 14px; }
.nav .brand { opacity: .5; filter: saturate(.35); transition: opacity .2s, filter .2s; }
.nav .brand:hover, .nav .brand.cur { opacity: 1; filter: none; }
.nav .brand.cur { position: relative; }
.nav .brand.cur::after { content: ""; position: absolute; left: 0; right: 0; bottom: -19px; height: 2px; background: var(--orange); }
.nav-cta { gap: 18px; }
.nav-buy { white-space: nowrap; gap: .32em; }
/* middle tabs spread evenly across the space between the two logos */
@media (min-width: 901px) { .nav-links { justify-content: space-evenly; gap: 12px; padding: 0 12px; } }
@media (max-width: 1100px) { .nav-buy-name { display: none; } .nav-cta .brand { margin-right: 4px; } }
@media (max-width: 900px) { .nav .brand.cur::after { bottom: -18px; } }
@media (max-width: 560px) {
  .nav-inner { gap: 12px; }
  .nav-cta { gap: 10px; }
  .nav-cta .brand span, .nav-buy-price { display: none; }
  .nav-cta .brand { margin-right: 0; }
  .brand { font-size: 1.1rem; }
}

/* ---- YouTube block (click to play) ---- */
.vid { padding: 28px; display: flex; flex-direction: column; gap: 16px; height: 100%; }
.yt { position: relative; display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; padding: 0; background: #000; overflow: hidden; border-radius: 4px; box-shadow: 0 0 0 1px var(--rule-2); }
button.yt { cursor: pointer; }
.yt img { width: 100%; height: 100%; object-fit: cover; opacity: .85; transition: opacity .2s, transform .4s; }
button.yt:hover img { opacity: 1; transform: scale(1.015); }
.yt-play { position: absolute; left: 50%; top: 50%; width: 68px; height: 48px; transform: translate(-50%, -50%); border-radius: 12px; background: var(--orange); box-shadow: 0 8px 24px rgba(0,0,0,.5); transition: transform .2s; }
.yt-play::after { content: ""; position: absolute; left: 27px; top: 14px; border-left: 18px solid var(--on-accent); border-top: 10px solid transparent; border-bottom: 10px solid transparent; }
button.yt:hover .yt-play { transform: translate(-50%, -50%) scale(1.08); }
.yt-note { position: absolute; right: 10px; bottom: 8px; font: .62rem var(--mono); letter-spacing: .08em; text-transform: uppercase; color: rgba(255,255,255,.7); background: rgba(0,0,0,.55); padding: 3px 6px; border-radius: 2px; }
.yt-list { background: linear-gradient(135deg, var(--sheet-2), #000); }
.yt-list-label { position: absolute; left: 14px; top: 12px; font: 600 .72rem var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--text-2); }
.yt-empty { display: grid; place-items: center; color: var(--muted); font: .8rem var(--mono); border: 1px dashed var(--rule-2); background: transparent; box-shadow: none; }
iframe.yt-on { height: auto; }
.vid-txt h3 { margin: 4px 0 6px; }
.vid-txt p { margin: 0; color: var(--text-2); }
.legal-part { scroll-margin-top: 80px; }

.yt-list-title { position: absolute; left: 50%; top: 38%; transform: translate(-50%, -50%); width: 80%; text-align: center; font: 800 clamp(1.4rem, 3.4vw, 2.6rem)/1.1 var(--font); letter-spacing: -.02em; color: var(--text); }
.yt-list .yt-play { top: 62%; }

/* ---------- Cart ---------- */
.btn-xl { padding: 20px 32px; font-size: 1.18rem; border-radius: 6px; }
.btn-xl svg { width: 22px; height: 22px; }
.btn-buy, .btn-checkout { width: 100%; box-shadow: 0 10px 28px -10px var(--orange); }
.btn-buy:hover, .btn-checkout:hover { transform: translateY(-1px); box-shadow: 0 14px 32px -10px var(--orange); }
.buy-actions { display: grid; gap: 12px; margin-top: 18px; }
.btn-both { width: 100%; justify-content: space-between; white-space: normal; text-align: left; box-shadow: inset 0 0 0 1.5px var(--orange); }
.btn-both:hover { box-shadow: inset 0 0 0 2px var(--orange-2); background: rgba(245,158,66,.07); }
.btn-both .save { flex: none; font: 700 .78rem/1 var(--mono); letter-spacing: .04em; text-transform: uppercase; color: var(--on-accent); background: var(--green); padding: 6px 9px; border-radius: 3px; }
.nav-cart { position: relative; display: inline-grid; place-items: center; width: 40px; height: 40px; color: var(--text); border: 1px solid var(--rule-2); border-radius: 4px; }
.nav-cart[hidden] { display: none; }
.nav-cart:hover { color: var(--text); border-color: var(--text-2); }
.nav-cart svg { width: 20px; height: 20px; }
.nav-cart-n { position: absolute; top: -7px; right: -7px; min-width: 19px; height: 19px; padding: 0 5px; border-radius: 10px; background: var(--orange); color: var(--on-accent); font: 700 .7rem/19px var(--mono); text-align: center; }
.cart { display: grid; grid-template-columns: 1.5fr 1fr; border-top: 1px solid var(--rule-2); }
.cart-main { padding: var(--pad); border-right: 1px solid var(--rule-2); }
.cart-sum { padding: var(--pad); display: grid; gap: 14px; align-content: start; background: rgba(0,0,0,.14); }
.cart-line { display: grid; grid-template-columns: 40px 1fr auto auto; gap: 16px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--rule-2); }
.cart-line:first-child { padding-top: 0; }
.cart-what { display: grid; gap: 4px; }
.cart-name { font-weight: 700; font-size: 1.1rem; color: var(--text); }
.cart-price { font: 700 1.1rem var(--mono); }
.cart-rm { background: none; border: 0; color: var(--muted); font: .8rem var(--mono); cursor: pointer; text-decoration: underline; padding: 4px; }
.cart-rm:hover { color: var(--text); }
.cart-empty p { font-size: 1.15rem; margin: 0 0 18px; }
.cart-picks { display: flex; flex-wrap: wrap; gap: 12px; }
.cart-upsell { margin-top: 24px; }
.cart-up { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; padding: 18px 20px; border: 1px dashed var(--orange); border-radius: 6px; background: rgba(245,158,66,.05); }
.cart-up-txt { display: grid; gap: 4px; }
.cart-rows { display: grid; gap: 8px; }
.cart-row { display: flex; justify-content: space-between; gap: 12px; color: var(--text-2); }
.cart-row > span:last-child { font-family: var(--mono); }
.cart-disc { color: var(--green); }
.cart-total { display: flex; justify-content: space-between; align-items: baseline; padding-top: 14px; border-top: 1px solid var(--rule-2); font-weight: 700; }
.cart-total b { font-size: 2rem; letter-spacing: -.02em; }
.cart-fine { margin: 4px 0 0; line-height: 1.7; }
@media (max-width: 900px) {
  .cart { grid-template-columns: 1fr; }
  .cart-main { border-right: 0; border-bottom: 1px solid var(--rule-2); }
  .cart-line { grid-template-columns: 32px 1fr auto; }
  .cart-line img { width: 32px; height: 32px; }
  .cart-rm { grid-column: 2 / -1; justify-self: start; }
}