/* sciencedrawings: a lab notebook. Graph paper, a chunky serif for headings,
   highlighter yellow, ink outlines like the drawings, a few tilted stamps.
   Phone first. */
:root {
  --bg: #f6f9ff;
  --grid: rgba(34, 48, 74, 0.07);
  --paper: #ffffff;
  --ink: #22304a;
  --muted: #56627c;
  --line: #d9e1f0;
  --highlight: #ffe66d;
  --coral: #ff5f6d;
  --mint: #7be08a;
  --sky: #8fd8ff;
  --lilac: #c9b6ff;
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Nunito", ui-rounded, system-ui, -apple-system, "Segoe UI", sans-serif;
  --max: 1160px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.6; font-weight: 500; -webkit-font-smoothing: antialiased;
  background-color: var(--bg);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px; }
a { color: var(--ink); text-decoration-color: var(--coral); text-decoration-thickness: 2px; text-underline-offset: 3px; }
h1, h2, .brand { font-family: var(--display); font-weight: 800; letter-spacing: -0.02em; font-variation-settings: "opsz" 144; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.small { font-size: 14px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* Header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 90%, transparent); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 2px solid var(--ink); }
.bar { display: flex; align-items: center; justify-content: space-between; gap: 8px 16px; flex-wrap: wrap; min-height: 60px; padding-top: 6px; padding-bottom: 6px; }
.brand { display: inline-flex; align-items: center; gap: 6px; font-size: 25px; text-decoration: none; color: var(--ink); }
.brand img { width: 34px; height: 34px; transform: rotate(-10deg); transition: transform .3s; }
.brand:hover img { transform: rotate(14deg); }
.top nav { display: flex; gap: 4px; overflow-x: auto; }
.top nav a { text-decoration: none; font-weight: 800; font-size: 15px; padding: 6px 12px; border-radius: 10px; border: 2px solid transparent; white-space: nowrap; }
.top nav a:hover { border-color: var(--ink); }
.top nav a[aria-current="page"] { background: var(--ink); color: var(--paper); }
.top nav a.nav-buy { border-color: var(--ink); background: var(--highlight); }
.top nav a.nav-buy[aria-current="page"] { background: var(--highlight); color: var(--ink); }
@media (max-width: 639px) { .top { position: static; } .top nav { width: 100%; } }

/* Hero */
.hero { padding: 36px 0 8px; }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1fr); gap: 28px; align-items: center; }
@media (min-width: 900px) { .hero-inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 40px; } }
.kicker { margin: 0; font-weight: 800; font-size: 15px; color: var(--muted); }
.kicker span { background: var(--mint); color: var(--ink); border: 2px solid var(--ink); border-radius: 8px; padding: 1px 8px; margin-right: 4px; }
h1 { font-size: clamp(42px, 9vw, 84px); line-height: 0.98; margin: 12px 0 16px; }
h1 em { font-style: italic; background: linear-gradient(transparent 58%, var(--highlight) 58%, var(--highlight) 92%, transparent 92%); padding: 0 4px; }
.lede { font-size: 19px; max-width: 540px; margin: 0; color: var(--muted); font-weight: 600; }
.lede strong { color: var(--ink); }
.stamps { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; }
.stamp { font-weight: 900; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; padding: 6px 12px; border: 2px solid var(--ink); border-radius: 8px; background: var(--paper); box-shadow: 3px 3px 0 var(--ink); }
.s1 { transform: rotate(-3deg); background: var(--sky); }
.s2 { transform: rotate(2deg); background: var(--highlight); }
.s3 { transform: rotate(-1.5deg); background: var(--lilac); }
.hero-card { display: block; text-decoration: none; background: var(--paper); border: 2px solid var(--ink); border-radius: 16px; padding: 10px 10px 6px; box-shadow: 6px 6px 0 var(--ink); transform: rotate(1.5deg); transition: transform .2s; }
.hero-card:hover { transform: rotate(0); }
.hero-card img { width: 100%; height: auto; display: block; border-radius: 8px; }
.hero-card span { display: block; text-align: center; font-weight: 800; font-size: 14px; color: var(--muted); padding: 6px 0 2px; }

/* The wall */
.wall { padding-top: 20px; }
.filters { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; justify-content: space-between; margin: 12px 0 18px; position: sticky; top: 62px; z-index: 5; padding: 10px 0; background: var(--bg); }
@media (max-width: 639px) { .filters { position: static; } }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { font: inherit; font-weight: 800; font-size: 15px; padding: 7px 14px; min-height: 40px; border-radius: 10px; border: 2px solid var(--ink); background: var(--paper); color: var(--ink); cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.search input { font: inherit; font-size: 16px; font-weight: 600; width: min(320px, 92vw); padding: 9px 14px; border-radius: 10px; border: 2px solid var(--ink); background: var(--paper); color: var(--ink); }
.search input:focus { outline: 3px solid var(--highlight); outline-offset: 1px; }

.grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
@media (min-width: 640px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (min-width: 980px) { .grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; } }
.card a { display: flex; flex-direction: column; height: 100%; padding: 10px; border-radius: 14px; background: var(--paper); border: 2px solid var(--line); text-decoration: none; transition: border-color .15s, transform .15s, box-shadow .15s; }
.card .thumb { display: flex; align-items: center; justify-content: center; aspect-ratio: 14 / 9; border-radius: 8px; overflow: hidden; background: #fbfcff; }
.card.clipart .thumb { background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 16px 16px; }
.card img { width: 100%; min-width: 0; height: auto; display: block; }
.card.clipart img { width: auto; height: 92%; }
.card .name { font-weight: 900; font-size: 16px; margin: 8px 2px 0; line-height: 1.25; }
.card .kind { font-size: 13px; font-weight: 700; color: var(--muted); margin: 2px 2px 0; }
.card a:hover { border-color: var(--ink); transform: translateY(-3px); box-shadow: 4px 4px 0 var(--ink); }
.card[hidden] { display: none; }
.empty { text-align: center; color: var(--muted); font-weight: 700; padding: 40px 0; }

/* A drawing's page */
.crumbs { padding-top: 18px; font-size: 14px; font-weight: 700; color: var(--muted); }
.detail { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 12px; align-items: start; }
@media (min-width: 980px) { .detail { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 40px; } }
.preview { margin: 0; background: var(--paper); border: 2px solid var(--ink); border-radius: 16px; padding: 10px; box-shadow: 6px 6px 0 var(--ink); }
.preview.dark { background: #141a33; }
.detail.clipart .preview { padding: 8%; background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 24px 24px; }
.preview img { width: 100%; height: auto; display: block; border-radius: 8px; }
.tags { display: flex; gap: 6px; flex-wrap: wrap; margin: 0; }
.tag { font-size: 13px; font-weight: 800; padding: 2px 10px; border-radius: 8px; border: 2px solid var(--ink); background: var(--mint); text-decoration: none; }
.tag.plain { background: var(--paper); }
.detail h1 { font-size: clamp(36px, 6vw, 58px); margin: 12px 0 10px; }
.detail h1 span { font-style: italic; color: var(--muted); }
.desc { font-size: 18px; color: var(--muted); font-weight: 600; margin: 0 0 18px; }
.switch { display: inline-flex; border: 2px solid var(--ink); border-radius: 12px; overflow: hidden; margin: 0 0 16px; background: var(--paper); }
.switch button { font: inherit; font-weight: 800; font-size: 15px; padding: 8px 14px; min-height: 44px; border: 0; background: transparent; color: var(--ink); cursor: pointer; }
.switch button + button { border-left: 2px solid var(--ink); }
.switch button[aria-pressed="true"] { background: var(--highlight); }
.dl { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 10px 18px; border-radius: 12px; border: 2px solid var(--ink); background: var(--paper); color: var(--ink); font: inherit; font-weight: 900; font-size: 16px; text-decoration: none; cursor: pointer; box-shadow: 3px 3px 0 var(--ink); transition: transform .08s, box-shadow .08s; }
.btn:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
.btn:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); }
.btn.primary { background: var(--highlight); }
.btn.pin { background: #e60023; color: #fff; }
.formats { font-weight: 700; font-size: 14px; margin: 12px 0 0; color: var(--muted); }
.status { min-height: 1.4em; font-weight: 700; color: var(--muted); margin: 6px 0 0; }
.license { font-size: 15px; color: var(--muted); margin: 10px 0 0; }
.credit { margin-top: 14px; padding: 12px 14px; border: 2px dashed var(--line); border-radius: 12px; background: var(--paper); }
.credit p { margin: 0 0 8px; font-size: 15px; }
.credit-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.credit code { font-size: 12px; background: #eef3fb; padding: 6px 10px; border-radius: 8px; overflow-x: auto; max-width: 100%; white-space: nowrap; }
.btn.small-btn { min-height: 36px; padding: 4px 12px; font-size: 14px; box-shadow: 2px 2px 0 var(--ink); }

/* What each part does */
.parts dl { display: grid; gap: 10px; margin: 0; }
@media (min-width: 720px) { .parts dl { grid-template-columns: 1fr 1fr; } }
.parts dl > div { background: var(--paper); border: 2px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.parts dt { font-weight: 900; }
.parts dt::before { content: ""; display: inline-block; width: 10px; height: 10px; border-radius: 50%; background: var(--coral); border: 2px solid var(--ink); margin-right: 8px; vertical-align: 1px; }
.parts dd { margin: 2px 0 0; color: var(--muted); font-weight: 600; font-size: 16px; }

h2 { font-size: clamp(28px, 4.5vw, 40px); margin: 52px 0 16px; }
.more { margin: 16px 0 0; font-weight: 800; }
.cat-head { padding-top: 32px; }
.cat-head .lede { margin-bottom: 24px; }
.pack { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin: 0 0 28px; }
.pack .small { color: var(--muted); font-weight: 700; }
.prose { max-width: 720px; padding-top: 32px; }
.prose ul { padding-left: 22px; }
.prose h2 { font-size: 28px; margin: 28px 0 8px; }

.foot { margin-top: 72px; background: var(--ink); color: #e6ecf8; padding: 28px 0 40px; }
.foot a { color: #fff; }
.foot p { margin: 4px 0; }

/* "What's it for?" dialog */
.use-dialog { border: 2px solid var(--ink); border-radius: 18px; padding: 28px 22px 18px; max-width: 640px; width: calc(100% - 32px); background: var(--paper); color: var(--ink); box-shadow: 6px 6px 0 var(--ink); }
.use-dialog::backdrop { background: rgba(34, 48, 74, 0.45); backdrop-filter: blur(3px); }
.use-dialog h2 { margin: 0 0 16px; font-size: 32px; text-align: center; }
.use-options { display: grid; gap: 12px; }
@media (min-width: 560px) { .use-options { grid-template-columns: 1fr 1fr; } }
.use { display: flex; flex-direction: column; gap: 4px; text-align: left; font: inherit; color: var(--ink); text-decoration: none; padding: 16px; border-radius: 14px; border: 2px solid var(--line); background: #fff; cursor: pointer; }
.use:hover { border-color: var(--ink); }
.use strong { font-size: 18px; font-weight: 900; }
.use span { font-weight: 700; color: var(--muted); }
.use small { font-size: 13px; color: var(--muted); }
.use em { font-style: normal; font-weight: 900; margin-top: 8px; align-self: flex-start; padding: 3px 12px; border-radius: 8px; border: 2px solid var(--ink); background: var(--mint); }
.use.commercial em { background: var(--highlight); }
.use-dialog .small { text-align: center; color: var(--muted); margin: 14px 0 0; }
.use-dialog .close { position: absolute; top: 10px; right: 14px; border: 0; background: none; font-size: 28px; cursor: pointer; color: var(--ink); }

/* Pricing and the licence certificate */
.pricing-head { padding-top: 32px; }
.tiers { display: grid; gap: 16px; margin-top: 8px; max-width: 820px; }
@media (min-width: 760px) { .tiers { grid-template-columns: 1fr 1fr; align-items: start; } }
.tier { background: var(--paper); border: 2px solid var(--line); border-radius: 16px; padding: 22px 20px 20px; }
.tier.featured { border-color: var(--ink); box-shadow: 6px 6px 0 var(--ink); }
.tier h2 { margin: 0; font-size: 32px; }
.tier .price { font-family: var(--display); font-weight: 800; font-size: 46px; margin: 0 0 8px; }
.tier .price span { font-family: var(--sans); font-size: 15px; font-weight: 800; color: var(--muted); }
.tier ul { list-style: none; padding: 0; margin: 0 0 8px; font-size: 15px; }
.tier li { padding: 3px 0 3px 22px; position: relative; }
.tier .yes li::before { content: "✓"; position: absolute; left: 0; font-weight: 900; color: #1a8a4a; }
.tier .no li { color: var(--muted); }
.tier .no li::before { content: "✕"; position: absolute; left: 0; font-weight: 900; }
.tier form, .tier .btn { margin-top: 12px; }
.tier .btn { width: 100%; }
.faq details { border-top: 2px solid var(--line); padding: 12px 0; }
.faq summary { cursor: pointer; font-weight: 800; }
.thanks .status { font-size: 18px; }
.certificate { margin: 24px 0 16px; padding: 28px 24px; border: 3px double var(--ink); border-radius: 14px; background: #fff; }
.cert-brand { font-family: var(--display); font-weight: 800; font-size: 26px; margin: 0; }
.certificate h2 { margin: 4px 0 16px; font-size: 28px; }
.certificate dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 0; }
.certificate dt { font-weight: 900; }
.certificate dd { margin: 0; word-break: break-word; }
@media print {
  .top, .foot, .thanks .btn, .thanks .lede, .thanks h1 { display: none !important; }
  body { background: #fff; }
}
.wall-title { margin: 8px 0 0; }

/* Language menu (the globe in the header) */
.lang { position: relative; }
.lang summary { list-style: none; display: inline-flex; align-items: center; gap: 4px; cursor: pointer; font-weight: 800; font-size: 14px; padding: 6px 10px; border: 2px solid var(--ink); border-radius: 10px; background: var(--paper); }
.lang summary::-webkit-details-marker { display: none; }
.lang ul { position: absolute; right: 0; top: calc(100% + 6px); z-index: 20; list-style: none; margin: 0; padding: 6px; width: 210px; max-height: 70vh; overflow-y: auto; background: var(--paper); border: 2px solid var(--ink); border-radius: 12px; box-shadow: 4px 4px 0 var(--ink); }
.lang li a { display: flex; gap: 10px; align-items: baseline; padding: 6px 8px; border-radius: 8px; text-decoration: none; font-weight: 700; }
.lang li a span { width: 22px; font-size: 11px; font-weight: 900; color: var(--muted); }
.lang li a:hover { background: #eef3fb; }
.lang li a[aria-current="true"] { background: var(--highlight); }
[dir="rtl"] .lang ul { right: auto; left: 0; }
.foot .langs a { white-space: nowrap; }
.switches { display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 16px; }
.switches .switch { margin: 0; }
.s0 { transform: rotate(2deg); background: var(--mint); }
.home-faq { padding-top: 8px; }

/* Picture diagrams (owner, 2026-11-04): the drawing with its labels as page text on top.
   Everything sits on a 1400 x 900 frame in percent, and type scales with the frame (cqw). */
.preview.picture { padding: 6px; background: #ffffff; }
.pic-frame { position: relative; aspect-ratio: 1400 / 900; container-type: inline-size; overflow: hidden; }
.pic-frame .pic { position: absolute; height: auto; max-width: none; }
.pic-frame .leaders { position: absolute; inset: 0; width: 100%; height: 100%; }
.pic-frame .leaders line { stroke: var(--ink); stroke-width: 3; vector-effect: non-scaling-stroke; }
.pic-frame .leaders circle { fill: var(--ink); }
.pic-frame .lbl { position: absolute; transform: translateY(-50%); white-space: nowrap; font-weight: 800; font-size: max(7px, 1.714cqw); line-height: 1; padding: .42em .58em; background: #ffffff; border: max(1px, .18cqw) solid var(--ink); border-radius: .42em; color: var(--ink); }
.pic-frame .lbl.grp { background: #fff3b0; }
.pic-frame[data-mode="blank"] .lbl { color: transparent; min-width: 13.6cqw; }
.pic-frame[data-mode="blank"] .lbl.grp { visibility: hidden; }
.pic-frame[data-mode="drawing"] .lbl, .pic-frame[data-mode="drawing"] .leaders { display: none; }