/* WindCanvas website. Layout concept: the test section. A dark tunnel-graphite page; the hero is a window into the
   running tunnel with a metre scale along its edge, results read like instrument strips, content sits on a 1180px
   grid. Single dark look by choice: the flow imagery is designed for a dark ground. */

@font-face { font-family: "Atkinson Hyperlegible"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Atkinson Hyperlegible"; font-style: italic; font-weight: 400; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-400-italic.woff2") format("woff2"); }
@font-face { font-family: "Atkinson Hyperlegible"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/atkinson-hyperlegible-latin-700-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Saira Condensed"; font-style: normal; font-weight: 500; font-display: swap; src: url("fonts/saira-condensed-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Saira Condensed"; font-style: normal; font-weight: 600; font-display: swap; src: url("fonts/saira-condensed-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "Saira Condensed"; font-style: normal; font-weight: 700; font-display: swap; src: url("fonts/saira-condensed-latin-700-normal.woff2") format("woff2"); }

:root {
  color-scheme: dark;
  --ink: #0a0e12;          /* page ground: graphite with a blue bias */
  --ink-raised: #10161c;   /* bands and panels */
  --ink-line: #223040;     /* hairlines, frames */
  --smoke: #e9eef3;        /* primary text: smoke white */
  --text: #c6d0da;         /* body copy on the ground */
  --haze: #97a6b4;         /* secondary text */
  --cyan: #52d3ea;         /* accent: the app's own cyan */
  --cyan-deep: #0f3a45;    /* accent wash */
  --heat: #ff8a4c;         /* used sparingly: the launch offer */
  --good: #6fdc8c;
  --f-display: "Saira Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --f-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;
  --f-data: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --step--1: 0.875rem; --step-0: 1.0625rem; --step-1: 1.25rem; --step-2: 1.6rem; --step-3: 2.15rem; --step-4: clamp(2.6rem, 5.4vw, 4.4rem);
  --radius: 6px;
  --wrap: 1180px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--ink); color: var(--smoke); font-family: var(--f-body); font-size: var(--step-0); line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
/* paints the band above the sticky header on phones with a notch (viewport-fit=cover) */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 30; background: var(--ink); }
img, video { max-width: 100%; }
a { color: var(--cyan); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 3px; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
h1, h2, h3 { font-family: var(--f-display); font-weight: 700; line-height: 1.04; letter-spacing: 0.005em; text-wrap: balance; margin: 0; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-2); font-weight: 600; }
p { margin: 0; }
.skip { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--cyan); color: var(--ink); padding: 8px 14px; border-radius: var(--radius); font-weight: 700; text-decoration: none; }
.skip:focus { top: 12px; }
.eyebrow { font-family: var(--f-data); font-size: 0.78rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan); }
.muted { color: var(--haze); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5em; font-family: var(--f-body); font-weight: 700; font-size: var(--step-0); line-height: 1.2; text-decoration: none; padding: 0.8em 1.25em; border-radius: var(--radius); border: 1px solid transparent; cursor: pointer; transition: background-color 0.15s, border-color 0.15s, color 0.15s; }
.btn-primary { background: var(--cyan); color: var(--ink); }
.btn-primary:hover { background: #7fe1f1; }
.btn-ghost { color: var(--smoke); border-color: var(--ink-line); background: transparent; }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }
.btn small { font-weight: 400; color: inherit; opacity: 0.8; }

/* header */
.offer-bar { display: none; background: var(--cyan-deep); border-bottom: 1px solid var(--ink-line); font-size: var(--step--1); text-align: center; padding: 7px 16px; }
.offer-on .offer-bar { display: block; }
.offer-bar b { font-family: var(--f-data); font-weight: 500; color: var(--heat); letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.74rem; margin-right: 6px; }
.offer-bar a { color: var(--smoke); }
.site-header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20; background: rgba(10, 14, 18, 0.9); backdrop-filter: blur(10px); border-bottom: 1px solid var(--ink-line); }
.site-header .wrap { display: flex; align-items: center; gap: 24px; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--smoke); text-decoration: none; font-family: var(--f-display); font-weight: 700; font-size: 1.45rem; letter-spacing: 0.02em; }
.brand svg { width: 30px; height: 30px; flex: none; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a { color: var(--haze); text-decoration: none; font-size: var(--step--1); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--smoke); }
.nav a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--cyan); text-underline-offset: 6px; }
.site-header .btn { padding: 0.55em 1em; font-size: var(--step--1); }
.menu { display: none; position: relative; }
.menu summary { list-style: none; cursor: pointer; color: var(--smoke); font-size: var(--step--1); padding: 8px 10px; border: 1px solid var(--ink-line); border-radius: var(--radius); }
.menu summary::-webkit-details-marker { display: none; }
.menu nav { position: absolute; right: 0; top: calc(100% + 8px); display: grid; min-width: 200px; background: var(--ink-raised); border: 1px solid var(--ink-line); border-radius: var(--radius); padding: 6px; }
.menu nav a { color: var(--smoke); text-decoration: none; padding: 10px 12px; border-radius: 4px; }
.menu nav a:hover { background: var(--ink); }
@media (max-width: 900px) { .nav { display: none; } .menu { display: block; margin-left: auto; } }
@media (max-width: 380px) { .site-header .btn-launch { display: none; } }

/* hero */
.hero .wrap { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; align-items: center; padding-block: 64px 40px; }
.hero h1 { font-size: var(--step-4); margin-top: 14px; }
.hero .lead, .page-hero .lead { font-size: var(--step-1); color: var(--text); margin-top: 20px; max-width: 34em; }
.ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.fine { font-size: var(--step--1); color: var(--haze); margin-top: 16px; max-width: 34em; }
.mobile-hint { display: none; }
.is-phone .mobile-hint { display: block; }
.window { position: relative; margin: 0; border: 1px solid var(--ink-line); border-radius: var(--radius); background: #05080b; overflow: hidden; }
.window video, .window img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.scale { position: absolute; left: 0; right: 0; top: 0; height: 22px; pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(233, 238, 243, 0.55) 0 1px, transparent 1px 10%),
    repeating-linear-gradient(90deg, rgba(233, 238, 243, 0.28) 0 1px, transparent 1px 2%);
  background-size: 100% 12px, 100% 6px; background-repeat: no-repeat; mix-blend-mode: screen; }
.window figcaption { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 10px 14px; font-family: var(--f-data); font-size: 0.75rem; color: var(--haze); border-top: 1px solid var(--ink-line); background: var(--ink-raised); }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-block: 40px 28px; } }

.page-hero .wrap { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 6fr); gap: 48px; align-items: center; padding-block: 64px 8px; }
.page-hero.solo .wrap { grid-template-columns: minmax(0, 1fr); max-width: 860px; margin-left: max(0px, calc((100% - var(--wrap)) / 2)); }
.page-hero h1 { font-size: clamp(2.3rem, 4.6vw, 3.6rem); margin-top: 14px; }
@media (max-width: 900px) { .page-hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 28px; padding-block: 40px 0; } }

/* readouts */
.readouts { border-block: 1px solid var(--ink-line); background: var(--ink-raised); }
.readouts .wrap { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.readout { padding: 18px 20px; border-left: 1px solid var(--ink-line); min-width: 0; }
.readout:first-child { border-left: 0; padding-left: 0; }
.readout .case { font-family: var(--f-data); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--haze); }
.readout .value { font-family: var(--f-data); font-size: 1.5rem; font-weight: 500; color: var(--smoke); font-variant-numeric: tabular-nums; margin-top: 4px; }
.readout .ref { font-size: var(--step--1); color: var(--haze); }
.readout .ref b { color: var(--cyan); font-weight: 400; }
@media (max-width: 900px) { .readouts .wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); } .readout:nth-child(3) { border-left: 0; padding-left: 0; } .readout:nth-child(n+3) { border-top: 1px solid var(--ink-line); } }

/* sections */
section { padding-block: 88px 0; }
.section-head { display: grid; gap: 14px; max-width: 46rem; }
.section-head p:not(.eyebrow):not(.offer-line) { color: var(--text); font-size: var(--step-1); }
.steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.steps li { border-top: 2px solid var(--cyan); padding-top: 18px; min-width: 0; }
.steps .num { font-family: var(--f-data); font-size: 0.8rem; color: var(--cyan); letter-spacing: 0.12em; }
.steps h3 { margin-top: 8px; }
.steps p { color: var(--text); margin-top: 10px; }
.steps.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 900px) { .steps.four { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 800px) { .steps, .steps.four { grid-template-columns: minmax(0, 1fr); } }

.feature { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 48px; align-items: center; margin-top: 72px; }
.feature.flip { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.feature.flip .shot { order: 2; }
.feature .shot { margin: 0; border: 1px solid var(--ink-line); border-radius: var(--radius); overflow: hidden; background: #05080b; }
.feature .shot img, .feature .shot video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 32px; }
.gallery figure { margin: 0; border: 1px solid var(--ink-line); border-radius: var(--radius); overflow: hidden; background: #05080b; }
.gallery img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.gallery figcaption { padding: 10px 14px; font-family: var(--f-data); font-size: 0.75rem; color: var(--haze); border-top: 1px solid var(--ink-line); }
@media (max-width: 900px) { .gallery { grid-template-columns: minmax(0, 1fr); } }
.feature .copy { display: grid; gap: 14px; min-width: 0; }
.feature .copy p { color: var(--text); }
.feature .spec { font-family: var(--f-data); font-size: 0.8rem; color: var(--haze); border-left: 2px solid var(--ink-line); padding-left: 12px; }
@media (max-width: 900px) { .feature, .feature.flip { grid-template-columns: minmax(0, 1fr); gap: 20px; margin-top: 48px; } .feature.flip .shot { order: 0; } }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 40px; border: 1px solid var(--ink-line); border-radius: var(--radius); }
.cards.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { padding: 26px 24px; border-left: 1px solid var(--ink-line); display: grid; gap: 10px; align-content: start; min-width: 0; }
.card:first-child { border-left: 0; }
.card p, .card li { color: var(--text); }
.card ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; }
.card > a { font-weight: 700; text-decoration: none; }
@media (max-width: 900px) { .cards, .cards.two { grid-template-columns: minmax(0, 1fr); } .card { border-left: 0; border-top: 1px solid var(--ink-line); } .card:first-child { border-top: 0; } }

.note { margin-top: 28px; border: 1px solid var(--ink-line); border-left: 3px solid var(--cyan); border-radius: var(--radius); padding: 16px 18px; color: var(--text); background: var(--ink-raised); max-width: 52rem; }
.note.warm { border-left-color: var(--heat); }
.prose { max-width: 46rem; display: grid; gap: 16px; margin-top: 28px; }
.prose p, .prose li { color: var(--text); }
.prose ul, .prose ol { margin: 0; padding-left: 22px; display: grid; gap: 8px; }

/* accuracy */
.accuracy-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; margin-top: 40px; align-items: start; }
.accuracy-grid .notes { display: grid; gap: 16px; }
.accuracy-grid .notes p { color: var(--text); }
.fitfor { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.fitfor div { border: 1px solid var(--ink-line); border-radius: var(--radius); padding: 14px 16px; font-size: var(--step--1); color: var(--text); }
.fitfor strong { display: block; font-family: var(--f-data); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan); margin-bottom: 6px; }
.fitfor .no strong { color: var(--haze); }
.table-scroll { overflow-x: auto; border: 1px solid var(--ink-line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: var(--step--1); }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--ink-line); vertical-align: top; }
th { font-family: var(--f-data); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--haze); background: var(--ink-raised); }
td { color: var(--text); }
td.num { font-family: var(--f-data); font-variant-numeric: tabular-nums; white-space: nowrap; color: var(--smoke); }
tr:last-child td { border-bottom: 0; }
tr.coarse td { color: var(--haze); }
@media (max-width: 900px) { .accuracy-grid { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 520px) { .fitfor { grid-template-columns: minmax(0, 1fr); } }

/* pricing */
.offer-line { display: none; gap: 10px; align-items: baseline; flex-wrap: wrap; margin-top: 6px; font-size: var(--step--1); color: var(--smoke); }
.offer-on .offer-line { display: inline-flex; }
.offer-line b { font-family: var(--f-data); font-weight: 500; color: var(--heat); letter-spacing: 0.06em; text-transform: uppercase; font-size: 0.74rem; }
.plans { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 36px; }
.plan { border: 1px solid var(--ink-line); border-radius: var(--radius); padding: 24px 22px; display: grid; grid-template-rows: auto auto auto 1fr auto; gap: 12px; min-width: 0; background: var(--ink); }
.plan.picked { border-color: var(--cyan); background: linear-gradient(180deg, rgba(82, 211, 234, 0.07), rgba(82, 211, 234, 0) 60%), var(--ink); }
.plan .tier { font-family: var(--f-display); font-weight: 600; font-size: var(--step-2); }
.plan .price { font-family: var(--f-data); font-size: 1.9rem; font-weight: 500; font-variant-numeric: tabular-nums; line-height: 1.1; }
.plan .price small { font-size: 0.85rem; color: var(--haze); font-weight: 400; }
.plan .was { font-family: var(--f-data); font-size: var(--step--1); color: var(--haze); }
.plan .was b { color: var(--heat); font-weight: 500; }
.plan .when-offer { display: none; }
.offer-on .plan .when-offer { display: block; }
.offer-on .plan .when-list { display: none; }
.plan ul { list-style: none; margin: 4px 0 0; padding: 0; display: grid; gap: 8px; align-content: start; font-size: var(--step--1); color: var(--text); }
.plan li { padding-left: 18px; position: relative; }
.plan li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 8px; height: 2px; background: var(--cyan); }
.plan li.off { color: var(--haze); }
.plan li.off::before { background: var(--ink-line); }
.plan .actions { display: grid; gap: 8px; }
.pricing-note { margin-top: 18px; font-size: var(--step--1); color: var(--haze); max-width: 62rem; }
@media (max-width: 1080px) { .plans { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .plans { grid-template-columns: minmax(0, 1fr); } }

/* faq */
.faq { margin-top: 32px; border-top: 1px solid var(--ink-line); max-width: 52rem; }
.faq details { border-bottom: 1px solid var(--ink-line); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 36px 18px 0; position: relative; font-weight: 700; font-size: var(--step-1); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font-family: var(--f-data); font-size: 1.4rem; color: var(--cyan); }
.faq details[open] summary::after { content: "\2212"; }
.faq details > p, .faq details > ul { color: var(--text); padding-bottom: 18px; max-width: 46rem; }
.faq details > ul { margin: 0; padding-left: 22px; }

/* browser check */
.check { margin-top: 28px; border: 1px solid var(--ink-line); border-radius: var(--radius); padding: 18px 20px; background: var(--ink-raised); max-width: 40rem; display: grid; gap: 6px; }
.check .status { font-family: var(--f-data); font-size: 0.9rem; }
.check .status.ok { color: var(--good); }
.check .status.warn { color: var(--heat); }

/* downloads */
.downloads { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 36px; }
.download { border: 1px solid var(--ink-line); border-radius: var(--radius); padding: 22px; display: grid; gap: 10px; align-content: start; min-width: 0; }
.download.suggested { border-color: var(--cyan); }
.download .arch { font-family: var(--f-display); font-weight: 600; font-size: var(--step-2); }
.download .meta { font-family: var(--f-data); font-size: 0.78rem; color: var(--haze); overflow-wrap: anywhere; }
.download .tag { display: none; font-family: var(--f-data); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan); }
.download.suggested .tag { display: block; }
@media (max-width: 720px) { .downloads { grid-template-columns: minmax(0, 1fr); } }

/* legal pages */
.legal { max-width: 46rem; padding-block: 48px 0; }
.legal h1 { font-size: clamp(2.2rem, 4vw, 2.8rem); margin-top: 10px; }
.legal h2 { font-size: var(--step-2); margin: 40px 0 10px; }
.legal p, .legal li { color: var(--text); }
.legal p + p { margin-top: 12px; }
.legal ul, .legal ol { padding-left: 22px; display: grid; gap: 8px; margin: 12px 0; }
.legal .table-scroll { margin: 14px 0; }
.legal .meta { color: var(--haze); font-size: var(--step--1); margin-top: 10px; }
.todo { background: rgba(255, 138, 76, 0.16); color: var(--heat); border-radius: 3px; padding: 0 4px; font-family: var(--f-data); font-size: 0.9em; }

/* closing band + footer */
.closing { margin-top: 96px; border-top: 1px solid var(--ink-line); background: var(--ink-raised); }
.closing .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; padding-block: 48px; }
.closing h2 { font-size: var(--step-3); max-width: 18em; }
.site-footer { border-top: 1px solid var(--ink-line); margin-top: 96px; }
.closing + .site-footer { margin-top: 0; }
.site-footer .wrap { display: grid; grid-template-columns: minmax(0, 1.2fr) repeat(3, minmax(0, 1fr)); gap: 24px 32px; padding-block: 36px 28px; font-size: var(--step--1); color: var(--haze); }
.site-footer h2 { font-family: var(--f-data); font-weight: 500; font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--haze); margin-bottom: 10px; }
.site-footer nav { display: grid; gap: 8px; align-content: start; }
.site-footer a, .site-footer button.linkish { color: var(--haze); text-decoration: none; }
.site-footer a:hover, .site-footer button.linkish:hover { color: var(--smoke); }
.site-footer .about p + p { margin-top: 8px; }
.site-footer .base { grid-column: 1 / -1; border-top: 1px solid var(--ink-line); padding-top: 18px; display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; }
@media (max-width: 800px) { .site-footer .wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); } .site-footer .about { grid-column: 1 / -1; } }
button.linkish { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; text-align: left; }

/* consent banner */
.consent { position: fixed; z-index: 60; left: max(12px, env(safe-area-inset-left, 0px)); right: max(12px, env(safe-area-inset-right, 0px)); bottom: max(12px, env(safe-area-inset-bottom, 0px)); max-width: 560px; background: var(--ink-raised); border: 1px solid var(--ink-line); border-radius: 10px; box-shadow: 0 18px 50px rgba(0, 0, 0, 0.55); padding: 20px; display: grid; gap: 12px; }
.consent[hidden] { display: none; }
.consent h2 { font-size: 1.35rem; }
.consent p { color: var(--text); font-size: var(--step--1); }
.consent .row { display: flex; flex-wrap: wrap; gap: 10px; }
.consent .row .btn { flex: 1 1 auto; padding: 0.65em 1em; font-size: var(--step--1); }
.consent fieldset { border: 1px solid var(--ink-line); border-radius: var(--radius); padding: 6px 14px; margin: 0; display: grid; gap: 0; }
.consent fieldset[hidden] { display: none; }
.consent legend { font-family: var(--f-data); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--haze); padding: 0 6px; }
.consent label { display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; align-items: start; padding: 10px 0; border-top: 1px solid var(--ink-line); cursor: pointer; }
.consent label:first-of-type { border-top: 0; }
.consent label input { margin-top: 4px; width: 18px; height: 18px; accent-color: var(--cyan); }
.consent label span { font-weight: 700; font-size: var(--step--1); }
.consent label small { grid-column: 2; color: var(--haze); font-size: 0.8rem; }

/* toast */
.toast { position: fixed; z-index: 70; left: 50%; bottom: max(24px, calc(env(safe-area-inset-bottom, 0px) + 12px)); transform: translateX(-50%); max-width: min(92vw, 520px); background: var(--smoke); color: var(--ink); padding: 12px 16px; border-radius: var(--radius); font-size: var(--step--1); box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5); }
.toast[hidden] { display: none; }

/* teachers: the free lesson pack (/teachers/). The same page prints as the A4 PDF (tools/make-lesson-pack.js): each
   lesson starts a new page and each worksheet gets its own. Worksheets look like paper on screen. */
.print-only { display: none; }
.jump { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 24px; font-size: var(--step--1); }
.jump a { color: var(--haze); text-decoration: none; border-bottom: 1px solid var(--ink-line); padding-bottom: 2px; }
.jump a:hover { color: var(--smoke); border-bottom-color: var(--cyan); }
.lesson-head { display: grid; gap: 14px; max-width: 52rem; }
.lesson-head .lead { font-size: var(--step-1); color: var(--text); }
.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 32px 0 0; border: 1px solid var(--ink-line); border-radius: var(--radius); }
.facts div { padding: 14px 18px; border-left: 1px solid var(--ink-line); min-width: 0; }
.facts div:first-child { border-left: 0; }
.facts dt { font-family: var(--f-data); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--haze); }
.facts dd { margin: 4px 0 0; color: var(--smoke); }
@media (max-width: 900px) { .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); } .facts div:nth-child(3) { border-left: 0; } .facts div:nth-child(n+3) { border-top: 1px solid var(--ink-line); } }
.cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 44px; margin-top: 36px; }
.block { display: grid; gap: 10px; align-content: start; min-width: 0; }
.block h3, .lesson-part { font-size: var(--step-1); font-weight: 700; }
.lesson-part { margin-top: 44px; }
.block p, .block li { color: var(--text); }
.block ul, .block ol { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.curric, .block ul.curric { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.curric li { color: var(--text); }
.code { font-family: var(--f-data); font-size: 0.8em; color: var(--cyan); white-space: nowrap; }
kbd { font-family: var(--f-data); font-size: 0.8em; padding: 1px 6px; border: 1px solid var(--ink-line); border-bottom-width: 2px; border-radius: 4px; color: var(--smoke); background: var(--ink-raised); white-space: nowrap; }
.timeline { list-style: none; margin: 16px 0 0; padding: 0; border-top: 1px solid var(--ink-line); max-width: 60rem; }
.timeline > li { display: grid; grid-template-columns: 6.2rem minmax(0, 1fr); gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--ink-line); }
.timeline .when { font-family: var(--f-data); font-size: 0.8rem; letter-spacing: 0.06em; color: var(--cyan); padding-top: 3px; }
.timeline h4 { font-family: var(--f-body); font-size: var(--step-0); font-weight: 700; margin: 0 0 6px; }
.timeline p { color: var(--text); }
.timeline p + p { margin-top: 8px; }
.timeline ol, .timeline ul { margin: 8px 0 0; padding-left: 20px; display: grid; gap: 6px; color: var(--text); }
.notes-list { margin: 16px 0 0; padding-left: 20px; display: grid; gap: 10px; max-width: 60rem; }
.notes-list li { color: var(--text); }
.expect { margin-top: 16px; max-width: 46rem; }
.expect td.num { white-space: nowrap; }
.ui-map { margin: 44px 0 0; max-width: 60rem; }
.ui-shot { position: relative; border: 1px solid var(--ink-line); border-radius: var(--radius); overflow: hidden; background: #05080b; }
.ui-shot img { display: block; width: 100%; height: auto; }
.pin { position: absolute; transform: translate(-50%, -50%); width: 26px; height: 26px; border-radius: 50%; background: var(--heat); color: #0b1016; font: 700 14px/26px var(--f-body); text-align: center; box-shadow: 0 0 0 2px #0b1016; }
.ui-keys { margin: 16px 0 0; padding-left: 22px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 32px; font-size: var(--step--1); color: var(--text); }
.trio, .pair { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin: 24px 0 0; max-width: 60rem; }
.pair { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.trio > div, .pair > div, .single { margin: 0; border: 1px solid var(--ink-line); border-radius: var(--radius); overflow: hidden; background: #05080b; }
.single { max-width: 40rem; margin-top: 24px; }
.trio img, .pair img, .single img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.trio span, .pair span, .single figcaption { display: block; padding: 8px 12px; font-family: var(--f-data); font-size: 0.75rem; color: var(--haze); border-top: 1px solid var(--ink-line); background: var(--ink-raised); }
.trio figcaption { grid-column: 1 / -1; font-size: var(--step--1); color: var(--haze); }
@media (max-width: 720px) { .ui-keys { grid-template-columns: minmax(0, 1fr); } .pin { width: 20px; height: 20px; font-size: 11px; line-height: 20px; } }
@media (max-width: 640px) { .cols { grid-template-columns: minmax(0, 1fr); } .timeline > li { grid-template-columns: minmax(0, 1fr); gap: 4px; } .trio, .pair { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 520px) { .facts { grid-template-columns: minmax(0, 1fr); } .facts div { border-left: 0; } .facts div + div { border-top: 1px solid var(--ink-line); } }

/* a worksheet: dark ink on paper, its own variables so every nested rule follows */
.sheet { --ink: #ffffff; --ink-raised: #edf1f4; --ink-line: #b9c4ce; --smoke: #0b1016; --text: #26323c; --haze: #5a6875; --cyan: #0a6a7e;
  color-scheme: light; margin-top: 44px; background: #fbfcfd; color: var(--smoke); border-radius: var(--radius); padding: clamp(18px, 3.2vw, 40px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4); max-width: 60rem; }
.sheet-top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 4px 20px; border-bottom: 2px solid var(--smoke); padding-bottom: 10px; }
.sheet-top h3 { font-size: var(--step-2); }
.sheet-top .eyebrow { color: var(--cyan); }
.sheet h4 { font-family: var(--f-display); font-size: var(--step-1); font-weight: 700; margin: 24px 0 8px; }
.sheet p { color: var(--text); }
.sheet a { color: var(--cyan); }
.fields { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr); gap: 18px; margin-top: 16px; font-size: var(--step--1); color: var(--haze); }
.fields span { border-bottom: 1px solid var(--haze); padding: 10px 0 2px; }
.sheet .table-scroll { border-radius: 0; border: 0; margin-top: 8px; }
.sheet table { border: 1px solid var(--ink-line); }
.sheet th, .sheet td { border: 1px solid var(--ink-line); }
.sheet th, .expect th { font-family: var(--f-body); font-weight: 700; font-size: var(--step--1); letter-spacing: 0; text-transform: none; }
.sheet th { color: var(--text); background: var(--ink-raised); }
.sheet td { height: 2.6rem; color: var(--smoke); }
.sheet td.row-head { font-weight: 700; white-space: nowrap; }
.sheet tr:last-child td { border-bottom: 1px solid var(--ink-line); }
.qs { list-style: none; margin: 8px 0 0; padding: 0; counter-reset: q; display: grid; gap: 14px; }
.qs > li { counter-increment: q; display: grid; grid-template-columns: 1.7rem minmax(0, 1fr); color: var(--text); }
.qs > li::before { content: counter(q) "."; font-weight: 700; color: var(--smoke); }
.lines { display: block; }
.lines i { display: block; height: 1.95rem; border-bottom: 1px solid #a3afba; }
.sheet figure { margin: 10px 0 0; }
.sheet svg { display: block; width: 100%; height: auto; }
.sheet table.tall td { height: 4.8rem; }
.sketch { display: block; height: 7.5rem; border: 1px solid var(--ink-line); border-radius: 4px; margin-top: 8px; }
.sketch.big { height: 13rem; }
@media (max-width: 520px) { .fields { grid-template-columns: minmax(0, 1fr); } }

/* STEM Racing (/stem-racing/): the guide on screen; printed, only the one-page summary for coordinators (.onepage) */
code { font-family: var(--f-data); font-size: 0.88em; }
.card ol.claim { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.card ol.claim li { color: var(--text); }
.block ul + h3 { margin-top: 10px; }
.note.independent { font-size: var(--step--1); color: var(--haze); }
.onepage { display: none; }

@media print { .site-header, .consent, .offer-bar, .closing, .toast { display: none !important; } body { background: #fff; color: #000; } }

@media print {
  .page-stem-racing { --ink: #ffffff; --ink-raised: #eef2f5; --ink-line: #bcc6cf; --smoke: #0b1016; --text: #26323c; --haze: #56646f; --cyan: #0a6a7e;
    color-scheme: light; background: #fff; color: var(--smoke); font-size: 10.4pt; line-height: 1.42; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .page-stem-racing main > :not(.onepage), .page-stem-racing .site-footer, .page-stem-racing .skip { display: none !important; }
  .page-stem-racing .onepage { display: block; padding: 0; }
  .op-head { display: grid; grid-template-columns: minmax(0, 1fr) 66mm; gap: 7mm; align-items: center; border-bottom: 2px solid var(--smoke); padding-bottom: 4mm; }
  .op-head h2 { font-size: 26pt; margin-top: 1.5mm; }
  .op-sub { font-size: 12.5pt; color: var(--text); margin-top: 1.5mm; }
  .op-head img { width: 66mm; height: auto; border-radius: 2mm; display: block; }
  .op-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6mm 9mm; margin-top: 6mm; }
  .onepage h3 { font-family: var(--f-display); font-size: 12.5pt; font-weight: 700; margin-bottom: 1.2mm; }
  .onepage p, .onepage li { color: var(--text); }
  .op-offer { margin-top: 5mm; border: 1px solid var(--ink-line); border-left: 1.2mm solid var(--cyan); border-radius: 2mm; padding: 3.5mm 4.5mm; background: var(--ink-raised); }
  .op-offer ol { margin: 1mm 0 0; padding-left: 5mm; display: grid; gap: 1.6mm; }
  .op-offer strong { color: var(--smoke); }
  .op-foot { margin-top: 6mm; padding-top: 3mm; border-top: 1px solid var(--ink-line); font-size: 8pt; color: var(--haze) !important; }
}

/* the lesson pack on paper: A4, dark on white, each lesson and each worksheet from a new page */
@media print {
  @page { size: A4; margin: 14mm 15mm 17mm; }
  /* the page margins take the root's background, which the dark color-scheme would otherwise make dark */
  :root { color-scheme: light; background: #fff; }
  .page-teachers { --ink: #ffffff; --ink-raised: #eef2f5; --ink-line: #bcc6cf; --smoke: #0b1016; --text: #26323c; --haze: #56646f; --cyan: #0a6a7e;
    color-scheme: light; background: #fff; color: var(--smoke); font-size: 9.6pt; line-height: 1.38; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .page-teachers #in-class { break-before: page; margin-top: 0; }
  .page-teachers .ui-shot { max-width: 158mm; }
  .page-teachers .sheet .new-page { break-before: page; margin-top: 0; }
  .page-teachers .sheet svg.graph { width: 128mm; margin: 0 auto; }
  .page-teachers .skip, .page-teachers .site-footer, .page-teachers .ctas, .page-teachers .jump, .page-teachers .window, .page-teachers .screen-only { display: none !important; }
  .page-teachers .print-only { display: block; }
  .page-teachers span.print-only { display: inline; }
  .page-teachers a { color: inherit; text-decoration: none; }
  .page-teachers .wrap { max-width: none; padding: 0; }
  .page-teachers section { padding-block: 0; margin-top: 9mm; }
  .page-teachers .page-hero { margin-top: 0; }
  .page-teachers .page-hero .wrap { display: block; padding: 0; }
  .page-teachers .page-hero h1 { font-size: 28pt; margin-top: 4mm; }
  .page-teachers .page-hero .lead, .page-teachers .lesson-head .lead { font-size: 12pt; max-width: none; }
  .page-teachers .fine { max-width: none; }
  .page-teachers h2 { font-size: 19pt; }
  .page-teachers h3, .page-teachers .lesson-part { font-size: 12.5pt; }
  .page-teachers .section-head { max-width: none; gap: 2mm; }
  .page-teachers .section-head p:not(.eyebrow) { font-size: 11pt; }
  .page-teachers .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 5mm; margin-top: 6mm; }
  .page-teachers .steps h3 { font-size: 12.5pt; }
  .page-teachers .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 6mm; }
  .page-teachers .card { padding: 4mm 5mm; border-left: 1px solid var(--ink-line); border-top: 0; }
  .page-teachers .card:first-child { border-left: 0; }
  .page-teachers .note { max-width: none; margin-top: 6mm; padding: 3mm 4mm; background: var(--ink-raised); }
  .page-teachers .prose { max-width: none; }
  .page-teachers .lesson { break-before: page; margin-top: 0; }
  .page-teachers .facts { grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 5mm; }
  .page-teachers .facts div { border-top: 0; border-left: 1px solid var(--ink-line); padding: 2.5mm 3.5mm; }
  .page-teachers .facts div:first-child { border-left: 0; }
  .page-teachers .cols { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4mm 9mm; margin-top: 5mm; }
  .page-teachers .block { gap: 1.6mm; }
  .page-teachers .block ul, .page-teachers .block ol { gap: 1mm; }
  .page-teachers .lesson-part { margin-top: 5.5mm; }
  .page-teachers .timeline { max-width: none; margin-top: 2.5mm; }
  .page-teachers .timeline > li { grid-template-columns: 19mm minmax(0, 1fr); gap: 4mm; padding: 2mm 0; }
  .page-teachers .timeline ol, .page-teachers .timeline ul { gap: 1mm; margin-top: 1.5mm; }
  .page-teachers .timeline h4 { margin-bottom: 1mm; }
  .page-teachers .notes-list { max-width: none; gap: 1.5mm; margin-top: 2.5mm; }
  .page-teachers .table-scroll { overflow: visible; }
  .page-teachers th, .page-teachers td { padding: 1.5mm 2.4mm; }
  .page-teachers kbd { border-bottom-width: 1px; padding: 0 3px; }
  .page-teachers .sheet { break-before: page; box-shadow: none; background: none; padding: 0; margin: 0; border-radius: 0; max-width: none; }
  .page-teachers .sheet-top h3 { font-size: 17pt; }
  .page-teachers .sheet h4 { font-size: 12.5pt; margin: 5mm 0 2mm; }
  .page-teachers .sheet td { height: 10.5mm; }
  .page-teachers .sheet table.tall td { height: 21mm; }
  .page-teachers .fields { grid-template-columns: 2fr 1fr 1fr; }
  .page-teachers .lines i { height: 7.2mm; }
  .page-teachers .sketch { height: 30mm; }
  .page-teachers .sketch.big { height: 62mm; }
  .page-teachers .qs { gap: 2.4mm; }
  .page-teachers .ui-map, .page-teachers .trio { max-width: none; margin-top: 6mm; }
  .page-teachers .pair { max-width: 128mm; margin-top: 5mm; }
  .page-teachers .notes-list li { font-size: 9.2pt; }
  .page-teachers .single { max-width: 150mm; margin-top: 5mm; display: grid; grid-template-columns: 86mm minmax(0, 1fr); }
  .page-teachers .single figcaption { border-top: 0; border-left: 1px solid var(--ink-line); display: flex; align-items: center; }
  .page-teachers .ui-keys { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5mm 8mm; }
  .page-teachers .pin { width: 5.5mm; height: 5.5mm; font-size: 8.5pt; line-height: 5.5mm; }
  .page-teachers .trio span, .page-teachers .pair span, .page-teachers .single figcaption { padding: 1.5mm 2.5mm; }
  .page-teachers h2, .page-teachers h3, .page-teachers h4, .page-teachers .lesson-part { break-after: avoid; }
  .page-teachers table, .page-teachers figure, .page-teachers .timeline > li, .page-teachers .facts, .page-teachers .qs > li, .page-teachers .note, .page-teachers .card, .page-teachers .steps li, .page-teachers .notes-list > li { break-inside: avoid; }
}