/* StudyVault design system, v2: "the marked-up desk"
   Cream paper, ink outlines, hard offset shadows, colour blocks per level,
   ink line illustrations and sticker badges. Display: Fraunces. UI: Instrument Sans. */

:root {
  --paper: #f8f1e4;
  --paper-2: #f1e6d0;
  --ink: #1d1a17;
  --ink-2: #4a423a;
  --ink-3: #7a6f63;
  --mustard: #f2c14e;
  --sage: #9fc8a2;
  --sky: #a9cbe8;
  --pink: #f4a3c4;
  --brick: #d9613f;
  --plum: #8b6bb1;
  --teal: #2f7f86;
  --white: #fffbf3;

  --c-math: var(--teal);
  --c-english: var(--brick);
  --c-ga: #3f5f9e;
  --c-science: #4f8a5b;
  --c-chinese: #c8402f;
  --c-oral: var(--plum);
  --c-multi: #2b2622;

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-ui: "Instrument Sans", "Helvetica Neue", Arial, sans-serif;

  --line: 2px;
  --shadow: 5px 5px 0 var(--ink);
  --shadow-lg: 10px 10px 0 var(--ink);
  --wrap: 1200px;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --s-1: .25rem; --s-2: .5rem; --s-3: .75rem; --s-4: 1rem; --s-5: 1.5rem; --s-6: 2rem; --s-7: 3rem; --s-8: 4rem; --s-9: 6rem;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 140ms; --t-mid: 260ms; --t-slow: 520ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { color-scheme: light; scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.55 var(--font-ui); -webkit-font-smoothing: antialiased; overflow-x: clip; }
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: .2em; }
:focus-visible { outline: 3px solid var(--brick); outline-offset: 3px; }
::selection { background: var(--mustard); color: var(--ink); }
p { margin: 0; }

h1, h2, h3, .display { font-family: var(--font-display); font-weight: 700; line-height: 1; letter-spacing: -0.02em; margin: 0; text-wrap: balance; font-variation-settings: "SOFT" 60, "WONK" 1; }
h1 { font-size: clamp(2.8rem, 1.6rem + 5vw, 5.6rem); font-weight: 800; }
h2 { font-size: clamp(2rem, 1.3rem + 2.6vw, 3.4rem); }
h3 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); }
em.marker { font-style: italic; font-weight: 600; font-variation-settings: "SOFT" 100, "WONK" 1; }
.lead { font-size: clamp(1.15rem, 1rem + .7vw, 1.45rem); line-height: 1.4; color: var(--ink-2); max-width: 34ch; }
.muted { color: var(--ink-2); } .small { font-size: .92rem; }
.eyebrow { font: 600 .74rem/1 var(--font-ui); letter-spacing: .16em; text-transform: uppercase; color: var(--ink-2); display: inline-flex; align-items: center; gap: .6em; }
.eyebrow::before { content: ""; width: 1.6em; height: var(--line); background: currentColor; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--narrow { max-width: 860px; }
.section { padding-block: clamp(3.5rem, 2.5rem + 5vw, 8rem); }
.section--tight { padding-block: clamp(2.5rem, 2rem + 2vw, 4rem); }
.block { border-top: var(--line) solid var(--ink); border-bottom: var(--line) solid var(--ink); }
.block + .block { border-top: 0; }
.bg-mustard { background: var(--mustard); } .bg-sage { background: var(--sage); } .bg-sky { background: var(--sky); } .bg-pink { background: var(--pink); } .bg-paper2 { background: var(--paper-2); }

/* scribble underline under a key word (SVG drawn in) */
.scribble { position: relative; display: inline-block; white-space: nowrap; }
.scribble svg { position: absolute; left: -2%; right: -2%; bottom: -0.12em; width: 104%; height: .32em; overflow: visible; }
.scribble path { fill: none; stroke: var(--brick); stroke-width: 5; stroke-linecap: round; stroke-dasharray: 400; stroke-dashoffset: 400; }
.is-loaded .scribble path { animation: draw 700ms var(--ease-out) 500ms forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }

/* buttons: outlined, hard shadow, physical press */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5em; min-height: 3rem; padding: .7em 1.5em; font: 600 .98rem/1 var(--font-ui); color: var(--ink); background: var(--white); border: var(--line) solid var(--ink); border-radius: 4px; box-shadow: var(--shadow); text-decoration: none; cursor: pointer; white-space: nowrap; transition: transform var(--t-fast) var(--ease-out), box-shadow var(--t-fast) var(--ease-out), background-color var(--t-fast); }
.btn:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--ink); color: var(--ink); }
.btn:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); transition-duration: 60ms; }
.btn--primary { background: var(--brick); color: var(--paper); } .btn--primary:hover { color: var(--paper); }
.btn--mustard { background: var(--mustard); }
.btn--ink { background: var(--ink); color: var(--paper); box-shadow: 5px 5px 0 var(--brick); } .btn--ink:hover { color: var(--paper); box-shadow: 7px 7px 0 var(--brick); }
.btn--sm { min-height: 2.4rem; padding: .5em 1.1em; font-size: .86rem; box-shadow: 3px 3px 0 var(--ink); } .btn--sm:hover { box-shadow: 5px 5px 0 var(--ink); }
.link-arrow { font-weight: 600; text-decoration: none; position: relative; padding-bottom: 2px; }
.link-arrow::after { content: "\2192"; display: inline-block; margin-left: .4em; transition: transform var(--t-mid) var(--ease-out); }
.link-arrow::before { content: ""; position: absolute; left: 0; bottom: 0; width: 100%; height: 2px; background: currentColor; transform: scaleX(.35); transform-origin: left; transition: transform var(--t-mid) var(--ease-out); }
.link-arrow:hover::before { transform: scaleX(1); } .link-arrow:hover::after { transform: translateX(4px); }

/* stickers */
.sticker { position: absolute; display: inline-grid; place-items: center; padding: .45em .8em; font: 700 .85rem/1.1 var(--font-ui); text-transform: uppercase; letter-spacing: .06em; background: var(--mustard); color: var(--ink); border: var(--line) solid var(--ink); border-radius: 999px; box-shadow: 3px 3px 0 var(--ink); transform: rotate(var(--r, -8deg)); z-index: 3; transition: transform var(--t-mid) var(--ease-out); }
.sticker--pink { background: var(--pink); } .sticker--sage { background: var(--sage); } .sticker--sky { background: var(--sky); } .sticker--white { background: var(--white); }
.sticker--price { font-family: var(--font-display); font-weight: 800; font-size: 1.15rem; letter-spacing: 0; text-transform: none; }

/* header */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--paper); border-bottom: var(--line) solid var(--ink); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 4.25rem; gap: var(--s-5); }
.wordmark { display: inline-flex; align-items: center; gap: .55rem; font: 800 1.35rem/1 var(--font-display); letter-spacing: -0.02em; text-decoration: none; color: var(--ink); font-variation-settings: "SOFT" 100; }
.wordmark svg { width: 1.6em; height: 1.6em; transition: transform var(--t-mid) var(--ease-out); }
.wordmark:hover svg { transform: rotate(-8deg); } .wordmark:hover { color: var(--ink); }
.nav-inner { display: flex; align-items: center; gap: clamp(1rem, 2.5vw, 2rem); }
.nav a:not(.btn) { position: relative; font-weight: 500; font-size: .95rem; text-decoration: none; padding: .35rem 0; }
.nav a:not(.btn)::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--ink); transform: scaleX(0); transform-origin: right; transition: transform var(--t-mid) var(--ease-out); }
.nav a:not(.btn):hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.nav-toggle { display: none; }
@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; align-items: center; gap: .5rem; background: var(--white); border: var(--line) solid var(--ink); border-radius: 4px; box-shadow: 3px 3px 0 var(--ink); padding: .5rem .9rem; font: 600 .85rem var(--font-ui); color: var(--ink); cursor: pointer; }
  .nav-toggle:active { transform: translate(2px,2px); box-shadow: 0 0 0 var(--ink); }
  .nav { display: grid; position: absolute; left: 0; right: 0; top: 100%; grid-template-rows: 0fr; background: var(--paper); padding: 0 var(--gutter); transition: grid-template-rows var(--t-slow) var(--ease-out), padding var(--t-slow); visibility: hidden; }
  .nav-inner { overflow: hidden; min-height: 0; display: grid; gap: 0; }
  .site-header.is-open .nav { grid-template-rows: 1fr; padding: var(--s-3) var(--gutter) var(--s-5); border-bottom: var(--line) solid var(--ink); visibility: visible; }
  .nav a:not(.btn) { padding: .85rem 0; border-bottom: 1px solid var(--ink-3); font-size: 1.05rem; }
  .nav .btn { margin-top: var(--s-4); justify-self: start; }
}

/* covers: a book with an ink outline and hard shadow */
.cover { --c: var(--c-multi); position: relative; aspect-ratio: 3 / 4; width: 100%; background: var(--c); color: var(--paper); border: var(--line) solid var(--ink); border-radius: 3px 8px 8px 3px; box-shadow: var(--shadow); padding: 9% 9% 8% 13%; display: grid; grid-template-rows: auto 1fr auto; gap: .5em; overflow: hidden; container-type: inline-size; text-decoration: none; transition: transform var(--t-mid) var(--ease-out), box-shadow var(--t-mid) var(--ease-out); }
.cover::before { content: ""; position: absolute; top: 0; bottom: 0; left: 7%; width: var(--line); background: var(--ink); opacity: .55; }
.cover::after { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .14; background-image: repeating-linear-gradient(0deg, transparent 0 22px, var(--paper) 22px 23px); }
.cover[data-pattern="grid"]::after { background-image: repeating-linear-gradient(0deg, transparent 0 20px, var(--paper) 20px 21px), repeating-linear-gradient(90deg, transparent 0 20px, var(--paper) 20px 21px); opacity: .12; }
.cover[data-pattern="dots"]::after { background-image: radial-gradient(var(--paper) 1.1px, transparent 1.3px); background-size: 14px 14px; opacity: .2; }
.cover[data-pattern="boxes"]::after { background-image: repeating-linear-gradient(0deg, transparent 0 28px, var(--paper) 28px 29px), repeating-linear-gradient(90deg, transparent 0 28px, var(--paper) 28px 29px); opacity: .1; }
.cover > * { position: relative; z-index: 1; }
.cover__top { display: flex; justify-content: space-between; gap: 1em; font: 600 clamp(.5rem, 3.8cqw, .78rem)/1 var(--font-ui); letter-spacing: .12em; text-transform: uppercase; }
.cover__title { font-family: var(--font-display); font-weight: 700; font-size: clamp(.9rem, 9cqw, 2.1rem); line-height: 1.02; letter-spacing: -0.02em; align-self: center; text-wrap: balance; font-variation-settings: "SOFT" 60, "WONK" 1; }
.cover__title em { font-style: italic; font-weight: 500; }
.cover__meta { display: flex; justify-content: space-between; gap: 1em; font: 500 clamp(.5rem, 3.6cqw, .76rem)/1 var(--font-ui); letter-spacing: .08em; text-transform: uppercase; }
@container (max-width: 110px) { .cover__top, .cover__meta { display: none; } .cover__title { font-size: .62rem; } }
@media (hover: hover) { .shelf-item:hover .cover { transform: translate(-4px, -8px) rotate(-1.5deg); box-shadow: 11px 13px 0 var(--ink); } }

/* shelf: books standing on a drawn shelf line */
.shelf { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: clamp(1.5rem, 3vw, 3rem); align-items: end; }
.shelf--3 { max-width: 920px; margin-inline: auto; }
.shelf-item { position: relative; display: grid; gap: var(--s-3); text-decoration: none; color: var(--ink); max-width: 260px; justify-self: center; width: 100%; }
.shelf-item .cover { max-width: 230px; }
.shelf-item .sticker { top: -14px; right: -6px; }
.shelf-item:hover .sticker { transform: rotate(6deg) scale(1.08); }
.shelf-item__title { font: 700 1.05rem/1.2 var(--font-display); letter-spacing: -0.01em; margin-top: var(--s-2); }
.shelf-item__sub { font-size: .86rem; color: var(--ink-2); }
.shelf-item:hover .shelf-item__title { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: .18em; }
.shelf-line { height: 14px; margin-top: var(--s-4); }
.shelf-line path { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; }
@media (max-width: 600px) { .shelf { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2rem 1rem; } .shelf-item__title { font-size: .95rem; } }

/* hero */
.hero { position: relative; overflow: clip; padding-block: clamp(3rem, 2rem + 4vw, 6rem) clamp(3rem, 2rem + 3vw, 5rem); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: clamp(2rem, 4vw, 4rem); align-items: center; }
.hero__copy { display: grid; gap: var(--s-5); }
.hero__copy h1 { max-width: 11ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--s-4) var(--s-5); align-items: center; }
.hero__note { font-size: .92rem; color: var(--ink-2); display: flex; flex-wrap: wrap; gap: .5em 1.2em; }
.hero__note span::before { content: "\2713"; margin-right: .4em; color: var(--brick); font-weight: 700; }
.hero__scene { position: relative; aspect-ratio: 1 / .95; }
.hero__scene .cover { position: absolute; width: 46%; left: 27%; top: 8%; transform-origin: 50% 100%; will-change: transform; }
.hero__scene .cover:nth-of-type(1) { --rot: -12deg; --tx: -42%; --ty: 6%; z-index: 1; }
.hero__scene .cover:nth-of-type(2) { --rot: 8deg; --tx: 44%; --ty: 3%; z-index: 2; }
.hero__scene .cover:nth-of-type(3) { --rot: -2deg; --tx: 0%; --ty: -2%; z-index: 3; box-shadow: var(--shadow-lg); }
.hero__scene .cover { transform: translate(var(--tx), var(--ty)) rotate(var(--rot)); }
.hero__scene .sticker { z-index: 4; }
.hero__scene .doodle { position: absolute; z-index: 0; }
.hero__scene .doodle--pencil { width: 22%; left: 0; bottom: 8%; --fr: -20deg; }
.hero__scene .doodle--tick { width: 12%; right: 6%; top: 4%; --fr: 6deg; }
.hero__scene .doodle--plane { width: 18%; right: -2%; bottom: 4%; --fr: -8deg; }
@media (max-width: 860px) { .hero .wrap { grid-template-columns: 1fr; } .hero__scene { max-width: 460px; width: 100%; margin: var(--s-4) auto 0; } .hero__copy h1 { max-width: 12ch; } }

/* marquee ticker */
.ticker { overflow: clip; contain: paint; border-top: var(--line) solid var(--ink); border-bottom: var(--line) solid var(--ink); background: var(--mustard); padding-block: .8rem; font: 700 .92rem/1 var(--font-ui); letter-spacing: .1em; text-transform: uppercase; }
.ticker__track { display: flex; width: max-content; animation: ticker 40s linear infinite; }
.ticker:hover .ticker__track { animation-play-state: paused; }
.ticker__track span { display: inline-flex; align-items: center; white-space: nowrap; }
.ticker__track span::after { content: "\2726"; margin-inline: 2rem; }
@keyframes ticker { to { transform: translateX(-50%); } }

/* racetrack: how buying works */
.track { position: relative; border: var(--line) solid var(--ink); border-radius: 999px; padding: clamp(1.5rem, 3vw, 3rem) clamp(1.5rem, 5vw, 5rem); background: var(--white); box-shadow: var(--shadow-lg); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-5); }
.track__step { display: grid; gap: var(--s-3); justify-items: center; text-align: center; }
.track__step .ill { width: 88px; height: 88px; border: var(--line) solid var(--ink); border-radius: 50%; background: var(--paper); display: grid; place-items: center; box-shadow: 3px 3px 0 var(--ink); transition: transform var(--t-mid) var(--ease-out), background-color var(--t-mid); }
.track__step:hover .ill { transform: rotate(-8deg) scale(1.06); background: var(--mustard); }
.track__step .ill svg { width: 54px; height: 54px; }
.track__step h3 { font-size: 1.15rem; }
.track__step p { font-size: .92rem; color: var(--ink-2); max-width: 22ch; }
.track__arrow { position: absolute; top: 46%; width: 10%; height: 24px; left: calc(25% * var(--n) - 5%); }
.track__arrow path { fill: none; stroke: var(--ink); stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 8 8; animation: march 1.2s linear infinite; }
@keyframes march { to { stroke-dashoffset: -32; } }
@media (max-width: 860px) { .track { grid-template-columns: repeat(2, minmax(0, 1fr)); border-radius: 24px; } .track__arrow { display: none; } }

/* annotated page: why the answers are written in */
.annotated { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 6rem); align-items: center; }
.annotated__page { position: relative; justify-self: center; width: min(100%, 420px); padding: 4% 6%; }
.annotated__page img { border: var(--line) solid var(--ink); box-shadow: var(--shadow-lg); background: white; transform: rotate(-2deg); }
.annotated__page .note { position: absolute; font: 600 italic 1.05rem/1.1 var(--font-display); color: var(--brick); background: var(--white); border: var(--line) solid var(--ink); padding: .4em .7em; border-radius: 4px; box-shadow: 3px 3px 0 var(--ink); white-space: nowrap; }
.annotated__page .note--1 { right: -6%; top: 20%; transform: rotate(4deg); }
.annotated__page .note--2 { left: -8%; bottom: 18%; transform: rotate(-5deg); }
.annotated__page .ring { position: absolute; width: 36%; aspect-ratio: 1; }
.annotated__page .ring path { fill: none; stroke: var(--brick); stroke-width: 4; stroke-linecap: round; stroke-dasharray: 700; stroke-dashoffset: 700; }
.annotated__page .ring--1 { right: 14%; top: 30%; } .annotated__page .ring--2 { left: 12%; bottom: 30%; width: 30%; }
.is-visible .ring path { animation: draw 900ms var(--ease-out) forwards; }
.is-visible .ring--2 path { animation-delay: 300ms; }
.annotated__copy { display: grid; gap: var(--s-5); }
.annotated__copy ul { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--s-3); }
.annotated__copy li { display: grid; grid-template-columns: 2.2rem 1fr; gap: var(--s-3); align-items: start; }
.annotated__copy li b { font: 800 1.4rem/1 var(--font-display); color: var(--brick); }
@media (max-width: 760px) { .annotated { grid-template-columns: 1fr; } .annotated__page { margin-bottom: var(--s-4); padding: 4% 8%; } .annotated__page .note--1 { right: 0; } .annotated__page .note--2 { left: 0; } }

/* field guide contents: numbered list */
.contents { list-style: none; padding: 0; margin: 0; border-top: var(--line) solid var(--ink); }
.contents > li { display: grid; grid-template-columns: 3rem minmax(0, 1fr) auto; gap: var(--s-4); align-items: baseline; padding: var(--s-4) 0; border-bottom: 1px dashed var(--ink-3); }
.contents > li:last-child { border-bottom: var(--line) solid var(--ink); }
.contents .num { font: 800 1.5rem/1 var(--font-display); color: var(--brick); }
.contents .ttl { font-weight: 600; }
.contents ul { list-style: none; padding: 0; margin: var(--s-1) 0 0; font-size: .92rem; color: var(--ink-2); }
.contents ul li::before { content: "\2014 "; color: var(--ink-3); }
.contents .qty { font: 600 .78rem/1 var(--font-ui); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-2); white-space: nowrap; background: var(--paper-2); border: 1px solid var(--ink); border-radius: 999px; padding: .4em .7em; }

/* facts */
.facts { margin: 0; border-top: var(--line) solid var(--ink); }
.facts > div { display: grid; grid-template-columns: 8rem 1fr; gap: var(--s-4); padding: .7rem 0; border-bottom: 1px dashed var(--ink-3); }
.facts dt { font: 600 .78rem/1.6 var(--font-ui); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); }
.facts dd { margin: 0; }

/* product page */
.product { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: clamp(2rem, 5vw, 6rem); align-items: start; }
.product__visual { position: relative; justify-self: center; width: min(100%, 380px); padding: 6% 8% 8% 4%; }
.product__visual .cover { transform: rotate(-3deg); box-shadow: var(--shadow-lg); }
.product__visual .cover:hover { transform: rotate(-1deg) translate(-3px, -6px); box-shadow: 14px 16px 0 var(--ink); }
.product__visual .sticker--price { top: -4px; right: -4px; --r: 8deg; font-size: 1.35rem; padding: .5em .8em; }
.product__visual .sticker--sample { bottom: 2%; left: -6%; --r: -8deg; }
.product__copy { display: grid; gap: var(--s-5); }
.product__copy h1 { font-size: clamp(2.4rem, 1.5rem + 3vw, 4rem); }
.buy { display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-4) var(--s-5); padding: var(--s-4) 0; border-top: var(--line) solid var(--ink); border-bottom: var(--line) solid var(--ink); }
.buy__price { font: 800 2.2rem/1 var(--font-display); }
.buy__price small { font: 600 .74rem/1 var(--font-ui); letter-spacing: .12em; text-transform: uppercase; color: var(--ink-2); margin-left: .6em; }
.buy__hint { font-size: .86rem; color: var(--ink-2); flex-basis: 100%; }
@media (max-width: 760px) { .product { grid-template-columns: 1fr; } .product__visual { width: min(100%, 300px); } }

/* look inside: fanned pages that peek and turn */
.peek { position: relative; height: clamp(360px, 46vw, 560px); max-width: 980px; margin-inline: auto; }
.peek figure { position: absolute; margin: 0; left: 50%; top: 4%; width: clamp(220px, 30vw, 340px); transform: translateX(-50%) rotate(var(--r)) translateX(var(--x)); transform-origin: 50% 110%; cursor: pointer; transition: transform var(--t-slow) var(--ease-expo); will-change: transform; }
.peek figure:nth-child(1) { --r: -9deg; --x: -34%; z-index: 1; } .peek figure:nth-child(2) { --r: 1deg; --x: 0%; z-index: 3; } .peek figure:nth-child(3) { --r: 10deg; --x: 34%; z-index: 2; }
.peek figure.is-front { --r: 0deg; --x: 0%; z-index: 5; }
.peek figure:not(.is-front):hover { transform: translateX(-50%) rotate(var(--r)) translateX(var(--x)) translateY(-14px); }
.peek img { width: 100%; aspect-ratio: .72; object-fit: cover; object-position: top; background: white; border: var(--line) solid var(--ink); box-shadow: var(--shadow); }
.peek figcaption { position: absolute; left: 50%; bottom: -12px; transform: translateX(-50%) rotate(-2deg); background: var(--mustard); border: var(--line) solid var(--ink); box-shadow: 3px 3px 0 var(--ink); padding: .35em .7em; font: 700 .72rem/1 var(--font-ui); letter-spacing: .1em; text-transform: uppercase; white-space: nowrap; opacity: 0; transition: opacity var(--t-mid); }
.peek figure.is-front figcaption, .peek figure:hover figcaption { opacity: 1; }
.peek__hint { text-align: center; font-size: .9rem; color: var(--ink-2); margin-top: var(--s-5); }
@media (max-width: 560px) { .peek { height: 66vw; } .peek figure { width: 52%; } .peek figure:nth-child(1) { --x: -24%; } .peek figure:nth-child(3) { --x: 24%; } }

/* catalogue */
.filters { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.filters a { font: 600 .82rem/1 var(--font-ui); letter-spacing: .08em; text-transform: uppercase; text-decoration: none; padding: .6em 1em; border: var(--line) solid var(--ink); border-radius: 999px; background: var(--white); box-shadow: 3px 3px 0 var(--ink); transition: transform var(--t-fast), box-shadow var(--t-fast), background-color var(--t-fast); }
.filters a:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); background: var(--mustard); }
.filters a:active { transform: translate(2px, 2px); box-shadow: 0 0 0 var(--ink); }
.group { padding-block: clamp(2.5rem, 2rem + 3vw, 5rem); }
.group__head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--s-4); align-items: end; margin-bottom: clamp(2rem, 1.5rem + 2vw, 3rem); }
.group__head p { color: var(--ink-2); max-width: 48ch; margin-top: var(--s-2); }
.group__tag { justify-self: end; position: static; }
@media (max-width: 640px) { .group__head { grid-template-columns: 1fr; } .group__tag { justify-self: start; } }

/* article with contents rail */
.article { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: clamp(2rem, 5vw, 6rem); align-items: start; }
.toc { position: sticky; top: 5.5rem; display: grid; border: var(--line) solid var(--ink); background: var(--white); box-shadow: var(--shadow); }
.toc a { text-decoration: none; font-size: .9rem; font-weight: 500; padding: .7rem .9rem; border-bottom: 1px dashed var(--ink-3); transition: background-color var(--t-fast), padding-left var(--t-mid) var(--ease-out); }
.toc a:last-child { border-bottom: 0; } .toc a:hover { background: var(--mustard); padding-left: 1.2rem; }
.prose { max-width: 64ch; }
.prose p + p { margin-top: var(--s-4); }
.prose h2 { margin-top: var(--s-8); margin-bottom: var(--s-4); font-size: clamp(1.7rem, 1.3rem + 1.4vw, 2.4rem); }
.prose > h2:first-child { margin-top: 0; }
.prose h3 { margin-top: var(--s-6); margin-bottom: var(--s-2); font: 700 1.05rem var(--font-ui); }
.prose ul { padding-left: 1.2em; margin: var(--s-3) 0; } .prose li + li { margin-top: var(--s-2); }
@media (max-width: 760px) { .article { grid-template-columns: 1fr; } .toc { position: static; grid-template-columns: 1fr 1fr; } }

/* callout card with a doodle */
.callout { position: relative; border: var(--line) solid var(--ink); box-shadow: var(--shadow-lg); padding: clamp(1.5rem, 2vw + 1rem, 3rem); display: grid; gap: var(--s-4); background: var(--sky); }
.callout h3 { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.2rem); max-width: 24ch; }
.callout .btn { justify-self: start; }
.callout .doodle { position: absolute; right: 3%; top: -14%; width: 120px; --fr: 8deg; }
@media (max-width: 640px) { .callout .doodle { width: 80px; top: -8%; } }

/* FAQ: outlined accordion rows */
.faq-section { margin-top: var(--s-7); }
.faq-section h2 { font-size: 1.6rem; margin-bottom: var(--s-4); display: flex; align-items: center; gap: .6em; }
.faq-section h2 .tag { font: 700 .72rem/1 var(--font-ui); letter-spacing: .1em; text-transform: uppercase; background: var(--mustard); border: var(--line) solid var(--ink); padding: .4em .6em; border-radius: 999px; }
.qa { border: var(--line) solid var(--ink); background: var(--white); }
.qa + .qa { border-top: 0; }
.qa summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: var(--s-4); padding: 1rem 1.2rem; font-weight: 600; transition: background-color var(--t-fast); }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; font: 700 1.5rem/1 var(--font-display); transition: transform var(--t-mid) var(--ease-out); flex-shrink: 0; }
.qa[open] summary::after { transform: rotate(45deg); }
.qa summary:hover { background: var(--paper-2); }
.qa__body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows var(--t-slow) var(--ease-out); }
.qa[open] .qa__body { grid-template-rows: 1fr; }
.qa__body > div { overflow: hidden; }
.qa__body p { padding: 0 1.2rem 1.2rem; color: var(--ink-2); max-width: 62ch; }

/* thank-you */
.receipt { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(2rem, 4vw, 5rem); align-items: start; }
@media (max-width: 760px) { .receipt { grid-template-columns: 1fr; } }
.tick { width: 96px; height: 96px; }
.tick circle { fill: var(--sage); stroke: var(--ink); stroke-width: 3; }
.tick path { fill: none; stroke: var(--ink); stroke-width: 6; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 120; stroke-dashoffset: 120; }
.is-loaded .tick path { animation: draw 600ms var(--ease-out) 300ms forwards; }
.files-group + .files-group { margin-top: var(--s-6); }
.files-group h3 { font: 700 .8rem/1 var(--font-ui); letter-spacing: .12em; text-transform: uppercase; display: flex; justify-content: space-between; gap: var(--s-3); margin-bottom: var(--s-3); }
.files { list-style: none; padding: 0; margin: 0; border: var(--line) solid var(--ink); background: var(--white); box-shadow: var(--shadow); }
.files > li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--s-4); align-items: center; padding: .85rem 1rem; border-bottom: 1px dashed var(--ink-3); }
.files > li:last-child { border-bottom: 0; }
.files .name { font-weight: 600; } .files .meta { font-size: .82rem; color: var(--ink-2); overflow-wrap: anywhere; }
.summary { border: var(--line) solid var(--ink); background: var(--mustard); box-shadow: var(--shadow); padding: var(--s-5); display: grid; gap: var(--s-3); font-size: .95rem; }
.summary .row { display: flex; justify-content: space-between; gap: var(--s-3); }
.summary .row + .row { border-top: 1px dashed var(--ink); padding-top: var(--s-3); }

/* checkout preview (Stripe hosted) */
.preview-note { background: var(--ink); color: var(--paper); font-size: .9rem; padding: var(--s-3) var(--gutter); text-align: center; }
.stripe { background: white; color: #1a1f36; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; }
.stripe .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); max-width: 1000px; }
.stripe__left { padding: 3rem 3rem 3rem 0; } .stripe__right { padding: 3rem 0 3rem 3rem; border-left: 1px solid #e6e8ee; }
@media (max-width: 760px) { .stripe .wrap { grid-template-columns: 1fr; } .stripe__left, .stripe__right { padding: 2rem 0; border: 0; } }
.stripe .back { font-size: .85rem; color: #6b7385; text-decoration: none; }
.stripe .amount { font-size: 2.2rem; font-weight: 600; margin-top: 1rem; }
.stripe .line { display: flex; justify-content: space-between; gap: 1rem; font-size: .95rem; padding: .6rem 0; border-top: 1px solid #e6e8ee; }
.stripe .thumb { width: 44px; height: 58px; border-radius: 3px; display: inline-block; vertical-align: middle; margin-right: .75rem; }
.stripe h2 { font: 600 1.1rem/1.3 inherit; letter-spacing: 0; }
.stripe .methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin: 1rem 0 1.5rem; }
.stripe .method { border: 1px solid #e6e8ee; border-radius: 6px; padding: .7rem .6rem; font-size: .8rem; text-align: center; }
.stripe .method[aria-selected="true"] { border-color: #635bff; box-shadow: 0 0 0 1px #635bff; }
.stripe .field { display: grid; gap: .3rem; font-size: .85rem; color: #30313d; margin-bottom: .9rem; }
.stripe .field span { display: block; border: 1px solid #e6e8ee; border-radius: 6px; padding: .65rem .75rem; color: #8d93a5; }
.stripe .qr { width: 180px; aspect-ratio: 1; margin: .5rem auto 1rem; background: repeating-linear-gradient(0deg, #1a1f36 0 6px, transparent 6px 12px), repeating-linear-gradient(90deg, #1a1f36 0 6px, transparent 6px 12px); background-blend-mode: multiply; opacity: .8; border: 6px solid white; outline: 1px solid #e6e8ee; }
.stripe .pay { display: block; width: 100%; background: #1a1f36; color: white; border: 0; border-radius: 6px; padding: .9rem; font-size: 1rem; font-weight: 600; cursor: pointer; }
.stripe .fine { font-size: .75rem; color: #6b7385; margin-top: 1rem; }
main:has(.stripe) + .site-footer { margin-top: 0; }

/* footer: ink block */
.site-footer { background: var(--ink); color: var(--paper); margin-top: clamp(3rem, 2rem + 4vw, 6rem); padding-block: var(--s-8) var(--s-6); font-size: .92rem; }
.site-footer .wrap { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--s-6); }
.site-footer .wordmark { color: var(--paper); }
.site-footer .big { font: 700 clamp(1.6rem, 1.2rem + 1.6vw, 2.4rem)/1.1 var(--font-display); max-width: 18ch; margin-top: var(--s-4); letter-spacing: -0.02em; }
.site-footer .big em { color: var(--mustard); font-style: italic; }
.site-footer .sc { font: 700 .74rem/1 var(--font-ui); letter-spacing: .14em; text-transform: uppercase; color: var(--mustard); }
.site-footer ul { list-style: none; padding: 0; margin: var(--s-3) 0 0; display: grid; gap: var(--s-2); }
.site-footer a { text-decoration: none; color: var(--paper); opacity: .85; } .site-footer a:hover { opacity: 1; text-decoration: underline; text-decoration-thickness: 2px; }
.site-footer .colophon { grid-column: 1 / -1; border-top: 1px solid rgb(255 255 255 / .25); padding-top: var(--s-4); margin-top: var(--s-4); display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-3); font-size: .82rem; opacity: .75; }
@media (max-width: 760px) { .site-footer .wrap { grid-template-columns: 1fr 1fr; } .site-footer .wrap > div:first-child { grid-column: 1 / -1; } }

/* utilities */
.stack { display: grid; gap: var(--s-4); }
.mt-4 { margin-top: var(--s-4); } .mt-6 { margin-top: var(--s-6); } .mt-7 { margin-top: var(--s-7); } .mt-8 { margin-top: var(--s-8); }
.center { text-align: center; }
.skip { position: absolute; left: var(--gutter); top: -3rem; background: var(--ink); color: var(--paper); padding: .5rem 1rem; z-index: 30; }
.skip:focus { top: .5rem; }
.doodle path, .doodle circle, .doodle line, .doodle polyline, .doodle ellipse { fill: none; stroke: var(--ink); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.doodle .fill-mustard { fill: var(--mustard); } .doodle .fill-pink { fill: var(--pink); } .doodle .fill-sky { fill: var(--sky); } .doodle .fill-paper { fill: var(--white); } .doodle .fill-brick { fill: var(--brick); }
.float { animation: float 6s var(--ease-inout) infinite; animation-delay: var(--fd, 0ms); }
@keyframes float { 0%, 100% { transform: translateY(0) rotate(var(--fr, 0deg)); } 50% { transform: translateY(-8px) rotate(calc(var(--fr, 0deg) + 2deg)); } }

/* motion: reveals */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity var(--t-slow) var(--ease-out), transform 700ms var(--ease-expo); transition-delay: calc(var(--i, 0) * 70ms); }
[data-reveal].is-visible { opacity: 1; transform: none; }
.sticker[data-reveal] { transform: scale(.6) rotate(var(--r, -8deg)); }
.sticker[data-reveal].is-visible { transform: rotate(var(--r, -8deg)); }
.hero__scene .cover[data-reveal] { transform: translate(var(--tx), 40%) rotate(0deg); opacity: 0; transition: transform 900ms var(--ease-expo), opacity 500ms var(--ease-out); }
.hero__scene .cover[data-reveal].is-visible { transform: translate(var(--tx), var(--ty)) rotate(var(--rot)); opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  .ticker__track { animation: none; }
  [data-reveal] { opacity: 1; transform: none; }
  .sticker[data-reveal] { transform: rotate(var(--r, -8deg)); }
  .hero__scene .cover[data-reveal] { transform: translate(var(--tx), var(--ty)) rotate(var(--rot)); opacity: 1; }
  .scribble path, .ring path, .tick path { stroke-dashoffset: 0; }
  .float { animation: none; }
}