:root {
  --paper: #f6f3ec; --sheet: #fff; --ink: #141414; --soft: #5d5a54; --line: #d9d4c8;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --hatch: repeating-linear-gradient(-45deg, var(--ink) 0 1px, transparent 1px 5px);
}
* { box-sizing: border-box; }
html { scroll-padding-top: 5rem; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: inherit; }
h1, h2, h3, .brand { font-family: var(--serif); line-height: 1.15; text-wrap: balance; }
main { max-width: 1120px; margin: 0 auto; padding: 0 16px 4rem; }

.top { position: sticky; top: 0; z-index: 2; display: flex; gap: 1.5rem; align-items: center; padding: .7rem 16px; background: var(--paper); border-bottom: 1.5px solid var(--ink); }
.brand { font-size: 1.4rem; font-weight: 700; text-decoration: none; white-space: nowrap; }
.brand span { font-style: italic; font-weight: 400; }
#nav { display: flex; gap: 1.2rem; overflow-x: auto; font-size: .9rem; white-space: nowrap; scrollbar-width: none; }
#nav a { text-decoration: none; color: var(--soft); }
#nav a:hover { color: var(--ink); text-decoration: underline; }
footer { border-top: 1.5px solid var(--ink); padding: 1.5rem 16px; text-align: center; color: var(--soft); font-size: .9rem; }

/* Home */
.hero { display: grid; grid-template-columns: 1.1fr 1fr; gap: 2.5rem; align-items: center; padding: 3.5rem 0 2.5rem; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.3rem); margin: 0 0 1rem; }
.hero h1 em { display: block; font-weight: 400; }
.hero p { color: var(--soft); max-width: 34rem; }
.heroimg { background-color: var(--sheet); border: 1.5px solid var(--ink); box-shadow: inset 0 0 5px 9px var(--sheet), 8px 8px 0 -1.5px var(--paper), 8px 8px 0 var(--ink) !important; }
.cta { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; font-size: .9rem; }
.btn { background: var(--ink); color: var(--paper); padding: .7rem 1.2rem; text-decoration: none; font-weight: 600; }
.btn:hover { background: #000; }

.cat { padding-top: 2.5rem; }
.cat h2 { font-size: 1.9rem; margin: 0; display: flex; align-items: center; gap: 1rem; }
.cat h2::after { content: ""; flex: 1; height: 10px; background: var(--hatch); opacity: .55; }
.cat > p { color: var(--soft); margin: .3rem 0 1.3rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 1.2rem; }
.card { display: flex; flex-direction: column; background: var(--sheet); border: 1.5px solid var(--ink); text-decoration: none; transition: transform .12s, box-shadow .12s; }
.card:hover, .card:focus-visible { transform: translate(-3px, -3px); box-shadow: 5px 5px 0 var(--ink); }
.card .thumb { aspect-ratio: 3/2; display: grid; place-items: center; border-bottom: 1.5px solid var(--ink); background: var(--sheet); overflow: hidden; }
.card .thumb div { height: 100%; max-width: 100%; }
.card .meta { display: flex; justify-content: space-between; align-items: center; padding: .7rem .9rem 0; font-size: .75rem; color: var(--soft); }
.card h3 { margin: .35rem .9rem .9rem; font-size: 1.08rem; }
.card.done h3::after { content: " ✓"; }

.lvl { display: inline-flex; align-items: center; gap: .4rem; font-size: .75rem; text-transform: uppercase; letter-spacing: .06em; color: var(--soft); }
.lvl::before { content: ""; width: 14px; height: 14px; border: 1.5px solid var(--ink); background: repeating-linear-gradient(-45deg, var(--ink) 0 1px, transparent 1px 6px); }
.lvl.l2::before { background: repeating-linear-gradient(-45deg, var(--ink) 0 1px, transparent 1px 3px); }
.lvl.l3::before { background: var(--ink); }

/* Tutorial */
.tuto { max-width: 900px; margin: 0 auto; padding-top: 2.5rem; }
.crumb { display: flex; gap: .6rem; align-items: center; font-size: .9rem; color: var(--soft); margin: 0; }
.tuto h1 { font-size: clamp(1.9rem, 5vw, 2.9rem); margin: .5rem 0 1rem; }
.intro { font-size: 1.15rem; color: #33312d; max-width: 46rem; }
.sheet { display: block; margin: 2rem 0; background: var(--sheet); border: 1.5px solid var(--ink); padding: 10px; cursor: zoom-in; }
.sheet img { display: block; width: 100%; height: auto; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.2rem; }
.steps li { display: grid; grid-template-columns: minmax(0, 300px) 1fr; gap: 1.5rem; align-items: center; background: var(--sheet); border: 1.5px solid var(--ink); padding: 1rem; }
.steps.nocrop li { grid-template-columns: 1fr; }
/* soft white edge: hides slivers of neighbouring panels when the generated grid is a few px off */
.panel, .card .thumb div, .heroimg { box-shadow: inset 0 0 5px 9px var(--sheet); }
.panel { width: 100%; background-color: var(--sheet); background-repeat: no-repeat; }
.steps h3 { margin: 0 0 .4rem; font-size: 1.25rem; display: flex; align-items: center; gap: .7rem; }
.steps h3 b { flex: none; display: grid; place-items: center; width: 2rem; height: 2rem; border: 1.5px solid var(--ink); border-radius: 50%; font-size: 1rem; }
.steps p { margin: 0; }
.tips { margin: 2rem 0; padding: 1.2rem 1.4rem; border: 1.5px solid var(--ink); background: linear-gradient(var(--paper), var(--paper)) padding-box, var(--hatch); border-left-width: 10px; }
.tips h2 { margin: 0 0 .5rem; font-size: 1.3rem; }
.tips ul { margin: 0; padding-left: 1.2rem; }
.tips li + li { margin-top: .4rem; }
.check label { display: inline-flex; gap: .6rem; align-items: center; cursor: pointer; font-weight: 600; }
.check input { width: 1.2rem; height: 1.2rem; accent-color: var(--ink); }
.pn { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 2rem; }
.pn a { border: 1.5px solid var(--ink); padding: .9rem 1rem; text-decoration: none; font-family: var(--serif); font-weight: 700; background: var(--sheet); }
.pn a:hover { background: var(--ink); color: var(--paper); }
.pn a:last-child { text-align: right; }
.pn small { display: block; font: 400 .8rem system-ui, sans-serif; opacity: .7; }

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; padding-top: 2rem; }
  .steps li { grid-template-columns: 1fr; }
  .panel { max-width: 360px; margin: 0 auto; }
  .pn { grid-template-columns: 1fr; }
  .pn a:last-child { text-align: left; }
}