/* Shed World — shared styles
   Palette: galvanised paper, creosote ink, shed green, tape yellow, gravel, timber */
:root {
  --paper: #e9ece5;
  --paper-2: #dfe3da;
  --ink: #26221d;
  --ink-soft: #4b463f;
  --green: #2f5d46;
  --green-deep: #1f4232;
  --tape: #f2c230;
  --tape-deep: #d9a915;
  --gravel: #8c8a84;
  --timber: #c99a5b;
  --line: #b9bdb2;

  --display: "Zilla Slab", Rockwell, "Roboto Slab", Georgia, serif;
  --body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.3125rem;
  --step-2: 1.75rem;
  --step-3: clamp(2rem, 1.4rem + 2.4vw, 2.75rem);
  --step-4: clamp(2.5rem, 1.5rem + 4.4vw, 4.75rem);

  --wrap: 75rem;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.6;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--green); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}
h1 { font-size: var(--step-4); line-height: 1.02; }
h2 { font-size: var(--step-3); }
h3 { font-size: var(--step-1); line-height: 1.25; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.measure { max-width: 38rem; }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip { position: absolute; left: 1rem; top: -4rem; background: var(--tape); color: var(--ink); padding: .5rem 1rem; z-index: 100; }
.skip:focus { top: 1rem; }

/* Tape measure — the brand's one recurring device */
.tape {
  --tick: var(--ink);
  height: 14px;
  background-color: var(--tape);
  background-image:
    repeating-linear-gradient(90deg, var(--tick) 0 1.5px, transparent 1.5px 60px),
    repeating-linear-gradient(90deg, var(--tick) 0 1px, transparent 1px 12px);
  background-size: 100% 100%, 100% 45%;
  background-repeat: no-repeat;
}

/* Header */
.site-header {
  position: relative;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex; align-items: center; gap: 1.5rem;
  min-height: 4.5rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--display); font-weight: 700; font-size: 1.5rem;
  color: var(--ink); text-decoration: none; letter-spacing: -0.01em;
}
.brand svg { width: 34px; height: 34px; flex: none; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 1.75rem; }
.nav ul { list-style: none; display: flex; gap: 1.75rem; margin: 0; padding: 0; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 700; }
.nav a:hover, .nav a[aria-current="page"] { text-decoration: underline; text-decoration-thickness: 3px; text-decoration-color: var(--tape-deep); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font: 700 1rem/1 var(--body);
  padding: 0.95rem 1.4rem;
  border: 2px solid var(--ink);
  background: var(--tape); color: var(--ink);
  text-decoration: none; cursor: pointer;
  border-radius: 4px;
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.btn--small { padding: .6rem 1rem; font-size: .9375rem; box-shadow: 2px 2px 0 var(--ink); }
.btn--green { background: var(--green); color: #fff; }
.menu-toggle { display: none; }

@media (max-width: 760px) {
  .nav { gap: .75rem; }
  .menu-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; background: none; border: 2px solid var(--ink); border-radius: 4px; cursor: pointer; color: var(--ink);
  }
  .nav ul {
    display: none;
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 2px solid var(--ink);
    padding: .5rem var(--gutter) 1rem;
  }
  .nav ul.open { display: flex; }
  .nav ul a { display: block; padding: .8rem 0; border-bottom: 1px solid var(--line); font-size: 1.125rem; }
  .brand { font-size: 1.3rem; }
}

/* Footer */
.site-footer { background: var(--green-deep); color: #e6ece6; margin-top: 6rem; }
.site-footer .tape { --tick: var(--ink); }
.site-footer .wrap { padding-top: 3rem; padding-bottom: 3rem; display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 2.5rem; }
.site-footer a { color: #fff; }
.site-footer h2 { font-size: 1.25rem; color: #fff; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .4rem; }
.site-footer .disclosure { font-size: var(--step--1); line-height: 1.55; max-width: 34rem; color: #cfd9d1; }
.site-footer .brand { color: #fff; margin-bottom: 1rem; }
.site-footer .small { font-size: var(--step--1); color: #b5c3b8; grid-column: 1 / -1; border-top: 1px solid #3d5e4d; padding-top: 1.25rem; margin: 0; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr; } }

/* Shared bits */
.kicker { font-weight: 700; color: var(--green); margin-bottom: .75rem; font-size: 1rem; }
.sample-tag {
  display: inline-block; font-size: .8125rem; font-weight: 700;
  padding: .15rem .5rem; border: 1.5px dashed var(--ink-soft); border-radius: 3px; color: var(--ink-soft);
}

/* Forms */
.field { display: grid; gap: .35rem; }
.field label { font-weight: 700; font-size: .9375rem; }
.field input {
  font: inherit; padding: .8rem .9rem; border: 2px solid var(--ink); border-radius: 4px;
  background: #fff; color: var(--ink); width: 100%;
}
.field input[aria-invalid="true"] { border-color: #a3261b; }
.field .err { color: #8f1f15; font-size: .875rem; font-weight: 700; min-height: 0; }
.form-note { font-size: var(--step--1); color: var(--ink-soft); }

/* ---------- Home ---------- */
.hero { padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem); }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero h1 { max-width: 11ch; }
.hero .lede { font-size: var(--step-1); line-height: 1.5; max-width: 32rem; color: var(--ink-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; align-items: center; margin-top: 1.75rem; }
.hero-actions a:not(.btn) { font-weight: 700; color: var(--ink); }
.plan { position: relative; margin: 0; }
.plan svg { width: 100%; height: auto; }
.plan figcaption { font-size: var(--step--1); color: var(--ink-soft); margin-top: .5rem; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } .plan { max-width: 32rem; } }

.questions { padding: 3rem 0 2rem; }
.questions-head { display: flex; justify-content: space-between; align-items: end; gap: 1rem; flex-wrap: wrap; border-bottom: 2px solid var(--ink); padding-bottom: 1rem; }
.questions-head h2 { margin: 0; }
.q-list { list-style: none; margin: 0; padding: 0; }
.q-list li { border-bottom: 1px solid var(--line); }
.q-list a {
  display: grid; grid-template-columns: 9rem 1fr auto; gap: 1.5rem; align-items: baseline;
  padding: 1.35rem 0; text-decoration: none; color: var(--ink);
}
.q-list .topic { font-weight: 700; color: var(--green); font-size: .9375rem; }
.q-list .q { font-family: var(--display); font-size: var(--step-2); line-height: 1.15; font-weight: 600; }
.q-list .count { color: var(--ink-soft); font-size: .9375rem; white-space: nowrap; }
.q-list a:hover .q { text-decoration: underline; text-decoration-color: var(--tape-deep); text-decoration-thickness: 3px; text-underline-offset: .15em; }
@media (max-width: 640px) {
  .q-list a { grid-template-columns: 1fr; gap: .25rem; }
  .q-list .q { font-size: 1.4rem; }
}

.signup-band { margin: 4rem 0; background: var(--tape); border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.signup-band .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; padding-top: 3rem; padding-bottom: 3rem; align-items: center; }
.signup-band h2 { margin-bottom: .4em; }
.signup-band p { max-width: 34rem; }
.inline-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; align-items: end; }
.inline-form .btn { grid-column: 1 / -1; justify-self: start; background: var(--ink); color: var(--tape); box-shadow: 3px 3px 0 var(--green-deep); }
.inline-form .form-note { grid-column: 1 / -1; margin: 0; color: var(--ink); }
@media (max-width: 860px) { .signup-band .wrap, .inline-form { grid-template-columns: 1fr; } }

.latest { padding: 1rem 0; }
.latest-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3rem; margin-top: 2rem; }
.feature-article { display: grid; gap: 1rem; text-decoration: none; color: var(--ink); }
.feature-article .art { background: var(--paper-2); border: 2px solid var(--ink); border-radius: 4px; padding: 1rem; }
.feature-article h3 { font-size: var(--step-2); margin: 0; }
.feature-article:hover h3 { text-decoration: underline; text-decoration-color: var(--tape-deep); text-decoration-thickness: 3px; }
.meta { font-size: .9375rem; color: var(--ink-soft); margin: 0; }
.article-list { list-style: none; margin: 0; padding: 0; }
.article-list li { padding: 1.1rem 0; border-top: 1px solid var(--line); }
.article-list li:first-child { border-top: 2px solid var(--ink); }
.article-list h3 { margin: 0 0 .3rem; font-size: 1.25rem; }
.article-list a { color: var(--ink); text-decoration: none; }
.article-list a:hover { text-decoration: underline; }
@media (max-width: 860px) { .latest-grid { grid-template-columns: 1fr; } }

.about-strip { padding: 4rem 0 0; }
.about-strip .wrap { display: grid; grid-template-columns: 1fr 1.6fr; gap: 3rem; }
.about-strip ul { margin: 0; padding-left: 1.2rem; }
.about-strip li { margin-bottom: .5rem; }
@media (max-width: 860px) { .about-strip .wrap { grid-template-columns: 1fr; gap: 1rem; } }

/* ---------- Articles index ---------- */
.page-head { padding: clamp(2.5rem, 5vw, 4rem) 0 2rem; }
.page-head p { font-size: var(--step-1); color: var(--ink-soft); max-width: 36rem; }
.topic-jump { position: sticky; top: 0; z-index: 10; background: var(--paper); border-bottom: 2px solid var(--ink); }
.topic-jump ul { list-style: none; margin: 0; padding: .75rem 0; display: flex; gap: .5rem; overflow-x: auto; scrollbar-width: thin; }
.topic-jump a {
  display: inline-block; white-space: nowrap; padding: .45rem .9rem; border: 1.5px solid var(--ink); border-radius: 999px;
  text-decoration: none; color: var(--ink); font-weight: 700; font-size: .9375rem; background: #fff;
}
.topic-jump a.is-active, .topic-jump a:hover { background: var(--tape); }
.topic-section { padding: 3rem 0 1rem; scroll-margin-top: 4rem; }
.topic-section .wrap { display: grid; grid-template-columns: 17rem 1fr; gap: 3rem; }
.topic-section h2 { font-size: var(--step-2); }
.topic-section .intro { color: var(--ink-soft); font-size: 1rem; }
.topic-section .article-list li:first-child { border-top: 2px solid var(--ink); }
.status { font-size: .8125rem; font-weight: 700; color: var(--ink-soft); background: var(--paper-2); padding: .1rem .45rem; border-radius: 3px; margin-left: .4rem; white-space: nowrap; vertical-align: middle; font-family: var(--body); }
.status--new { background: var(--tape); color: var(--ink); }
@media (max-width: 860px) { .topic-section .wrap { grid-template-columns: 1fr; gap: 1rem; } }

/* ---------- Article ---------- */
.progress-tape { position: fixed; left: 0; right: 0; top: 0; z-index: 50; transform-origin: 0 50%; transform: scaleX(0); height: 8px; }
.article-head { padding: clamp(2.5rem, 5vw, 4rem) 0 2rem; border-bottom: 2px solid var(--ink); }
.crumbs { font-size: .9375rem; margin-bottom: 1.25rem; }
.crumbs a { color: var(--ink-soft); }
.article-head h1 { font-size: clamp(2.3rem, 1.4rem + 4vw, 4.25rem); max-width: 16ch; }
.article-head .standfirst { font-size: var(--step-1); line-height: 1.5; max-width: 40rem; color: var(--ink-soft); }
.facts { display: flex; flex-wrap: wrap; gap: .75rem 2.5rem; margin: 1.5rem 0 0; padding: 0; }
.facts div { display: grid; }
.facts dt { font-size: .875rem; color: var(--ink-soft); }
.facts dd { margin: 0; font-family: var(--display); font-weight: 700; font-size: 1.375rem; }

.article-body { display: grid; grid-template-columns: minmax(0, 40rem) minmax(0, 1fr); gap: clamp(2rem, 5vw, 5rem); padding-top: 3rem; }
.prose h2 { margin-top: 2.5em; scroll-margin-top: 2rem; }
.prose h2:first-child { margin-top: 0; }
.prose p, .prose li { line-height: 1.65; }
.prose ul { padding-left: 1.2rem; }
.note {
  border-left: 6px solid var(--tape); background: #fff; padding: 1rem 1.25rem; margin: 1.5rem 0; border-radius: 0 4px 4px 0;
}
.note p:last-child { margin: 0; }

.steps { list-style: none; margin: 1.5rem 0 0; padding: 0; counter-reset: step; }
.steps > li { position: relative; padding: 0 0 2.25rem 4rem; counter-increment: step; }
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: -.15rem;
  width: 2.75rem; height: 2.75rem; display: grid; place-items: center;
  font: 700 1.375rem/1 var(--display);
  background: var(--paper); border: 2px solid var(--ink); border-radius: 50%;
}
.steps > li::after { content: ""; position: absolute; left: calc(1.375rem - 1px); top: 2.75rem; bottom: .25rem; width: 2px; background: var(--line); }
.steps > li:last-child::after { display: none; }
.steps > li.is-current::before { background: var(--tape); }
.steps h3 { font-size: 1.375rem; margin-bottom: .4rem; }

.aside-col { position: relative; }
.section-diagram { position: sticky; top: 2rem; }
.section-diagram figure { margin: 0; background: #fff; border: 2px solid var(--ink); border-radius: 4px; padding: 1rem 1rem .75rem; }
.section-diagram svg { width: 100%; height: auto; }
.section-diagram figcaption { font-size: .9375rem; color: var(--ink-soft); padding-top: .5rem; border-top: 1px solid var(--line); margin-top: .5rem; }
.section-diagram .layer-name { font-weight: 700; color: var(--ink); }
.toc { margin-top: 1.5rem; }
.toc h2 { font-size: 1.125rem; margin-bottom: .5rem; }
.toc ol { margin: 0; padding-left: 1.25rem; font-size: .9375rem; }
.toc a { color: var(--ink); }

.diagram-inline { display: none; margin: 1.5rem 0; }
@media (max-width: 960px) {
  .article-body { grid-template-columns: minmax(0, 1fr); }
  .aside-col { display: none; }
  .diagram-inline { display: block; }
  .diagram-inline figure { margin: 0; background: #fff; border: 2px solid var(--ink); border-radius: 4px; padding: .75rem; }
  .diagram-inline figcaption { font-size: .9375rem; color: var(--ink-soft); margin-top: .5rem; }
}

.checklist { list-style: none; padding: 0 !important; margin: 1rem 0 1.5rem; border-top: 2px solid var(--ink); }
.checklist li { border-bottom: 1px solid var(--line); }
.checklist label { display: grid; grid-template-columns: 1.5rem 1fr auto; gap: .75rem; padding: .75rem 0; cursor: pointer; align-items: start; }
.checklist input { width: 1.25rem; height: 1.25rem; margin: .2rem 0 0; accent-color: var(--green); }
.checklist .qty { font-weight: 700; white-space: nowrap; text-align: right; }
.checklist input:checked ~ span:not(.qty) { text-decoration: line-through; color: var(--ink-soft); }
.checklist-status { font-size: .9375rem; color: var(--ink-soft); }

.table-scroll { overflow-x: auto; margin: 1rem 0 .5rem; border: 2px solid var(--ink); border-radius: 4px; background: #fff; }
table { border-collapse: collapse; width: 100%; font-size: 1rem; }
caption { text-align: left; padding: .8rem 1rem; font-weight: 700; border-bottom: 1px solid var(--line); }
th, td { padding: .7rem 1rem; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--paper-2); font-size: .9375rem; }
td.num, th.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
tfoot td, tfoot th { font-weight: 700; background: var(--tape); border-bottom: 0; }
.table-note { font-size: .9375rem; color: var(--ink-soft); }

.picks { display: grid; gap: 1rem; margin: 1.25rem 0; }
.pick { border: 2px dashed var(--ink-soft); border-radius: 4px; padding: 1rem 1.25rem; background: var(--paper); }
.pick h3 { margin: .5rem 0 .3rem; font-size: 1.1875rem; }
.pick p { font-size: 1rem; margin-bottom: .6rem; }
.pick a { font-weight: 700; }

.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer; list-style: none; padding: 1rem 2.5rem 1rem 0; position: relative;
  font-family: var(--display); font-weight: 700; font-size: 1.25rem; line-height: 1.3;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: .25rem; top: .7rem; font: 700 1.6rem/1 var(--body); }
.faq details[open] summary::after { content: "\2212"; }
.faq .answer { padding-bottom: 1rem; }

.guide-cta { margin: 3rem 0 0; background: var(--green); color: #fff; border-radius: 4px; padding: 1.75rem; display: grid; gap: .5rem; border: 2px solid var(--ink); }
.guide-cta h2 { color: #fff; margin: 0; font-size: var(--step-2); }
.guide-cta p { margin: 0 0 .75rem; color: #e1ebe4; }
.guide-cta .btn { justify-self: start; }

/* ---------- Free guide ---------- */
.guide-hero { padding: clamp(2.5rem, 5vw, 4rem) 0 3rem; }
.guide-hero .wrap { display: grid; grid-template-columns: 1fr 26rem; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.guide-hero .lede { font-size: var(--step-1); color: var(--ink-soft); max-width: 34rem; }
.signup-card { background: #fff; border: 2px solid var(--ink); border-radius: 4px; box-shadow: 6px 6px 0 var(--ink); overflow: hidden; }
.signup-card form { padding: 1.5rem; display: grid; gap: 1rem; }
.signup-card h2 { font-size: 1.5rem; margin: 0; }
.check { display: grid; grid-template-columns: 1.25rem 1fr; gap: .6rem; font-size: .9375rem; align-items: start; }
.check input { width: 1.15rem; height: 1.15rem; margin: .2rem 0 0; accent-color: var(--green); }
.success { padding: 1.5rem; }
.success h2 { font-size: 1.5rem; }
.cover { margin: 2rem 0 0; max-width: 22rem; }
.contents { padding: 2rem 0; }
.contents .wrap { display: grid; grid-template-columns: 17rem 1fr; gap: 3rem; }
.chapters { list-style: none; margin: 0; padding: 0; counter-reset: ch; border-top: 2px solid var(--ink); }
.chapters li { counter-increment: ch; display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.chapters li::before { content: counter(ch); font: 700 2rem/1 var(--display); color: var(--green); }
.chapters h3 { margin: 0 0 .3rem; }
.chapters p { margin: 0; color: var(--ink-soft); }
.not-in { padding: 2rem 0; }
.not-in .wrap { display: grid; grid-template-columns: 17rem 1fr; gap: 3rem; }
@media (max-width: 960px) {
  .guide-hero .wrap, .contents .wrap, .not-in .wrap { grid-template-columns: 1fr; gap: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}