:root {
  --ink: #171915;
  --paper: #fffdf8;
  --cream: #f6f1e7;
  --soft-blue: #dfe9ff;
  --blue: #2f61dc;
  --green: #087a50;
  --line: #20231e;
  --shadow: 7px 7px 0 #20231e;
}

* { box-sizing: border-box; }
body { margin: 0; color: var(--ink); background: #f7f3eb; font-family: var(--coloring-body-font, 'Open Sans', Arial, sans-serif); }
button, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.coloring-shell { width: min(1440px, calc(100% - 40px)); margin: 0 auto; }
.coloring-site-nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.coloring-site-nav nav { display: flex; align-items: center; gap: 18px; }
.coloring-site-nav nav a { color: var(--ink); font-weight: 800; text-decoration: none; }
.coloring-site-nav nav a:not(.nav-pill):hover { text-decoration: underline; }

.coloring-main { min-height: 70vh; }
.coloring-breadcrumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 28px 0 18px; font-size: .9rem; font-weight: 700; }
.coloring-breadcrumbs a { color: #405064; }
.coloring-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .44fr); gap: 34px; align-items: end; padding: 18px 0 34px; border-bottom: 2px solid var(--line); }
.coloring-kicker { margin: 0 0 10px; color: var(--green); font-size: .78rem; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
.coloring-hero h1, .coloring-studio-heading h1 { margin: 0; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: clamp(2.6rem, 6vw, 5.9rem); line-height: .94; letter-spacing: -.055em; }
.coloring-hero p { max-width: 670px; margin: 20px 0 0; color: #4f554f; font-size: clamp(1rem, 1.5vw, 1.23rem); line-height: 1.65; }
.coloring-hero-note { padding: 24px; border: 2px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.coloring-hero-note strong { display: block; margin-bottom: 8px; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: 1.15rem; }
.coloring-hero-note p { margin: 0; font-size: .97rem; line-height: 1.5; }

.coloring-library-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; padding: 34px 0 18px; }
.coloring-library-head h2 { margin: 0; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: clamp(1.85rem, 3.4vw, 3.2rem); letter-spacing: -.035em; }
.coloring-library-head p { margin: 8px 0 0; color: #59605a; }
.coloring-count { flex: 0 0 auto; font-size: .86rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.coloring-card-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; padding: 0 0 48px; }
.coloring-card-grid:has(.coloring-card:only-child) { grid-template-columns: minmax(260px, 320px); }
.coloring-card { min-width: 0; border: 2px solid var(--line); background: #fff; box-shadow: 5px 5px 0 var(--line); transition: transform .14s ease, box-shadow .14s ease; }
.coloring-card:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--line); }
.coloring-card a { display: block; color: inherit; text-decoration: none; }
.coloring-card-image { aspect-ratio: 5 / 6; overflow: hidden; border-bottom: 2px solid var(--line); background: #fff; }
.coloring-card img { width: 100%; height: 100%; display: block; object-fit: contain; }
.coloring-card-body { padding: 16px 16px 18px; }
.coloring-card-number { color: var(--green); font-size: .75rem; font-weight: 900; letter-spacing: .14em; }
.coloring-card h3 { margin: 7px 0 0; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: 1.12rem; line-height: 1.22; }
.coloring-card-description { margin: 8px 0 0; color: #444b45; font-size: .9rem; line-height: 1.5; }
.coloring-card-meta { margin: 7px 0 0; color: #606660; font-size: .85rem; }
.coloring-pack-card { display: block; min-width: 0; padding: 20px; border: 2px solid var(--line); background: #fff; box-shadow: 5px 5px 0 var(--line); color: inherit; text-decoration: none; transition: transform .14s ease, box-shadow .14s ease; }
.coloring-pack-card:hover { transform: translate(-2px, -2px); box-shadow: 8px 8px 0 var(--line); }
.coloring-pack-card h3 { margin: 0; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: 1.2rem; line-height: 1.25; }
.coloring-pack-card p { margin: 10px 0 18px; color: #444b45; font-size: .92rem; line-height: 1.5; }
.coloring-pack-card strong { color: var(--green); }
.coloring-empty { margin: 0 0 48px; padding: 32px; border: 2px solid var(--line); background: #fff; }
.coloring-empty h2 { margin-top: 0; }
.coloring-empty a { color: var(--ink); font-weight: 900; }

.coloring-guide { border-top: 2px solid var(--line); background: #fff; }
.coloring-guide-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; padding: 54px 0; }
.coloring-guide h2 { margin: 0 0 14px; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: 2rem; }
.coloring-guide p { color: #4f554f; line-height: 1.7; }
.coloring-faq details { border-top: 1px solid #b8bbb5; }
.coloring-faq details:last-child { border-bottom: 1px solid #b8bbb5; }
.coloring-faq summary { padding: 15px 2px; cursor: pointer; font-weight: 900; }
.coloring-faq details p { margin: 0 0 16px; }

.coloring-studio-main { width: min(1680px, calc(100% - 32px)); margin: 0 auto; }
.coloring-studio-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; padding: 24px 0 22px; }
.coloring-studio-heading h1 { font-size: clamp(2.25rem, 4vw, 4.5rem); }
.coloring-studio-heading p { max-width: 520px; margin: 8px 0 0; color: #59605a; }
.coloring-studio-status { min-height: 24px; margin: 0; color: var(--green); font-weight: 800; text-align: right; }
.coloring-thumb-bar { display: grid; grid-template-columns: 46px minmax(0, 1fr) 46px; align-items: center; gap: 10px; padding: 14px; border: 2px solid var(--line); background: #cbcbd0; }
.coloring-thumb-scroll { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x proximity; scrollbar-width: thin; }
.coloring-thumb { flex: 0 0 90px; padding: 4px; border: 3px solid transparent; background: #fff; scroll-snap-align: center; cursor: pointer; }
.coloring-thumb[aria-current='true'] { border-color: var(--blue); }
.coloring-thumb img { width: 100%; height: auto; aspect-ratio: 5 / 6; display: block; object-fit: contain; }
.coloring-thumb span { display: block; padding: 3px 1px 1px; color: #4d534d; font-size: .68rem; font-weight: 900; text-align: center; }
.coloring-arrow { width: 44px; height: 44px; border: 2px solid var(--line); border-radius: 50%; background: #fff; font-weight: 900; cursor: pointer; }
.coloring-arrow:disabled { opacity: .35; cursor: default; }
.coloring-workspace { display: grid; grid-template-columns: minmax(620px, 1fr) minmax(310px, 370px); gap: 20px; align-items: start; padding: 20px 0 48px; }
.coloring-preview-panel { min-width: 0; border: 2px solid var(--line); background-color: #e7e7e3; background-image: linear-gradient(45deg, #d4d4cf 25%, transparent 25%), linear-gradient(-45deg, #d4d4cf 25%, transparent 25%), linear-gradient(45deg, transparent 75%, #d4d4cf 75%), linear-gradient(-45deg, transparent 75%, #d4d4cf 75%); background-size: 24px 24px; background-position: 0 0, 0 12px, 12px -12px, -12px 0; padding: clamp(18px, 3vw, 44px); overflow: auto; touch-action: pan-y; }
.coloring-output-page { position: relative; width: min(100%, 760px); aspect-ratio: var(--page-ratio, 8.5 / 11); margin: 0 auto; background: #fff; box-shadow: 0 3px 18px rgba(0,0,0,.18); overflow: hidden; }
.coloring-output-image-wrap { position: absolute; inset: 0; display: grid; place-items: center; }
.coloring-output-page img { position: absolute; inset: 0; width: 100%; height: 100%; max-width: 100%; max-height: 100%; display: block; object-fit: contain; }
.coloring-image-error { display: none; place-items: center; height: 100%; padding: 20px; border: 2px dashed #777; text-align: center; }
.coloring-output-page.is-broken img { display: none; }
.coloring-output-page.is-broken .coloring-image-error { display: grid; }
.coloring-controls { display: grid; gap: 16px; position: sticky; top: 90px; }
.coloring-control-card { border: 2px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.coloring-control-card > h2 { margin: 0; padding: 16px 18px; border-bottom: 1px solid #c8cac4; font-family: var(--coloring-headline-font, 'Figtree', Arial, sans-serif); font-size: 1.3rem; }
.coloring-control-body { padding: 18px; }
.coloring-detail-list { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; margin: 0; font-size: .92rem; }
.coloring-detail-list dt { color: #666c66; }
.coloring-detail-list dd { margin: 0; font-weight: 800; }
.coloring-size-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.coloring-size-option { position: relative; }
.coloring-size-option input { position: absolute; opacity: 0; }
.coloring-size-option label { display: block; padding: 13px 10px; border: 2px solid var(--line); text-align: center; font-weight: 900; cursor: pointer; }
.coloring-size-option input:checked + label { color: #fff; background: var(--ink); }
.coloring-fit-note { margin: 14px 0 0; color: #606660; font-size: .85rem; line-height: 1.45; }
.coloring-actions { display: grid; gap: 10px; }
.coloring-button { width: 100%; min-height: 48px; border: 2px solid var(--line); background: #fff; color: var(--ink); font-weight: 900; cursor: pointer; }
.coloring-button-primary { color: #fff; background: var(--blue); }
.coloring-button:disabled { opacity: .48; cursor: not-allowed; }
.coloring-back-link { color: var(--ink); font-weight: 900; }
.coloring-print-root { display: none; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; }
.site-footer nav a { color: var(--ink); font-size: .86rem; font-weight: 800; text-decoration: none; }
.site-footer nav a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }

@media (max-width: 1100px) {
  .coloring-card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .coloring-workspace { grid-template-columns: minmax(0, 1fr) 320px; }
}

@media (max-width: 820px) {
  .coloring-shell, .coloring-studio-main { width: min(100% - 24px, 720px); }
  .coloring-site-nav { min-height: 64px; }
  .coloring-site-nav nav a:not(.nav-pill) { display: none; }
  .coloring-hero, .coloring-guide-inner { grid-template-columns: 1fr; }
  .coloring-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .coloring-studio-heading { align-items: start; flex-direction: column; }
  .coloring-studio-status { text-align: left; }
  .coloring-workspace { grid-template-columns: 1fr; }
  .coloring-controls { position: static; }
}

@media (max-width: 470px) {
  .coloring-shell, .coloring-studio-main { width: calc(100% - 20px); }
  .coloring-site-nav nav { gap: 8px; }
  .coloring-site-nav .nav-pill { padding-inline: 12px; }
  .coloring-breadcrumbs { padding-top: 18px; }
  .coloring-hero { padding-top: 8px; gap: 22px; }
  .coloring-hero h1 { font-size: clamp(2.35rem, 14vw, 3.5rem); }
  .coloring-card-grid { grid-template-columns: 1fr; gap: 16px; }
  .coloring-library-head { align-items: start; flex-direction: column; }
  .coloring-guide-inner { padding: 38px 0; }
  .coloring-thumb-bar { grid-template-columns: 38px minmax(0, 1fr) 38px; padding: 10px 8px; }
  .coloring-arrow { width: 36px; height: 36px; }
  .coloring-thumb { flex-basis: 72px; }
  .coloring-workspace { padding-top: 12px; }
  .coloring-preview-panel { padding: 14px; }
  .coloring-output-page { min-width: 0; width: 100%; box-shadow: 0 2px 9px rgba(0,0,0,.15); }
  .coloring-size-options { grid-template-columns: 1fr; }
  .coloring-actions { grid-template-columns: 1fr 1fr; }
  .coloring-actions .coloring-button-primary { grid-column: 1 / -1; }
}

@media print {
  @page { margin: 0; }
  body { background: #fff !important; }
  body > :not(.coloring-print-root) { display: none !important; }
  .coloring-print-root { display: block !important; width: var(--print-width); height: var(--print-height); }
  .coloring-print-root [data-output-page] { width: var(--print-width) !important; height: var(--print-height) !important; aspect-ratio: auto !important; margin: 0 !important; box-shadow: none !important; print-color-adjust: exact; -webkit-print-color-adjust: exact; }
}