/* Keep the guide's editorial layout and paper illustrations separate from the editor. */
.size-guide { width: min(100%, 1120px); padding-block: var(--space-5) var(--space-6); }
.size-guide__hero { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); margin-bottom: 40px; }
.size-guide__hero > div { max-width: 730px; }
.size-guide__hero h1 { font-size: clamp(2rem, 4vw, 3.4rem); letter-spacing: -.045em; }
.size-guide__hero .lede { max-width: 650px; margin-bottom: 0; }
.size-guide__hero > a { flex-shrink: 0; }
.size-guide .eyebrow { color: var(--color-primary); }
.size-guide__sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.size-guide [hidden] { display: none !important; }
.size-comparison { border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; background: var(--color-surface); box-shadow: var(--shadow-sm); }
.size-comparison__heading { display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); padding: var(--space-5) var(--space-6); border-bottom: 1px solid var(--color-border); }
.size-comparison__heading h2 { margin-bottom: 0; }
.size-comparison__controls { display: flex; flex-wrap: wrap; align-items: end; gap: var(--space-3); }
.size-comparison__picker { display: grid; gap: var(--space-1); margin: 0; font-size: .8rem; color: var(--color-muted); }
.size-comparison__picker select { min-width: 125px; color: var(--color-ink); }
.size-orientation { display: flex; flex-shrink: 0; border: 0; border-radius: var(--radius-md); padding: 4px; margin: 0; background: var(--color-surface-subtle); }
.size-orientation label { position: relative; margin: 0; cursor: pointer; }
.size-orientation input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.size-orientation span { display: block; padding: 10px 14px; border-radius: var(--radius-sm); font-size: .875rem; font-weight: 700; }
.size-orientation input:checked + span { background: var(--color-primary); color: white; box-shadow: var(--shadow-sm); }
.size-orientation input:focus-visible + span { outline: 3px solid var(--color-primary); outline-offset: 3px; }
.size-comparison__body { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(260px, 1fr); }
.size-comparison__art { min-width: 0; padding: 0 var(--space-5) var(--space-4); background: radial-gradient(circle at 40% 40%, var(--color-primary-soft), transparent 70%), var(--color-canvas); }
.size-comparison__art > svg { display: block; width: 100%; height: auto; overflow: visible; }
.size-comparison__selected { color: var(--color-primary); }
.size-comparison__reference { color: var(--color-muted); }
.size-comparison__sheet { fill: white; stroke: currentColor; stroke-width: 2; }
.size-comparison__baseline { fill: none; stroke: var(--color-border-strong); stroke-width: 1; stroke-dasharray: 5 6; }
.size-comparison__width, .size-comparison__height { fill: var(--color-ink); font-size: 20px; font-weight: 600; }
.size-comparison__label { fill: var(--color-ink); font-size: 23px; font-weight: 700; }
.size-comparison__reference-caption { fill: var(--color-muted); font-size: 18px; }
.size-comparison__caption { margin: 0; text-align: center; font-size: .8rem; color: var(--color-muted); }
.size-details { align-self: center; padding: var(--space-6); }
.size-details h3 { font-size: 2.5rem; margin-bottom: var(--space-2); }
.size-details__tagline { font-weight: 700; }
.size-details__dimensions { display: grid; gap: var(--space-4); margin-block: var(--space-5); }
.size-details__dimensions dt { color: var(--color-muted); font-size: .8rem; }
.size-details__dimensions dt span { margin-left: 6px; }
.size-details__dimensions dd { font-size: 1.2rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.size-details > p:not(.eyebrow):not(.size-details__tagline) { font-size: .9rem; }
.size-details__note { display: flex; align-items: flex-start; gap: var(--space-2); padding-top: var(--space-4); border-top: 1px solid var(--color-border); color: var(--color-muted); margin-bottom: 0; }
.size-details__note svg { width: 20px; height: 20px; flex-shrink: 0; color: var(--color-accent); }
.size-options, .size-reference { margin-top: 56px; }
.size-guide__section-heading { display: flex; align-items: end; justify-content: space-between; gap: var(--space-4); }
.size-guide__section-heading > p { color: var(--color-muted); font-size: .875rem; }
.size-options__group-heading { margin: var(--space-5) 0 var(--space-3); font-size: 1rem; }
.size-options__grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-4); }
.size-option { position: relative; display: flex; flex-direction: column; align-items: flex-start; min-width: 0; padding: var(--space-5); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.size-option.is-selected { border-color: var(--color-primary); box-shadow: inset 0 0 0 1px var(--color-primary); background: linear-gradient(150deg, var(--color-primary-soft), white 75%); }
.size-option__thumbnail { height: 94px; color: var(--color-primary); }
.size-option h4 { font-size: 1.1rem; margin-bottom: var(--space-2); }
.size-option__dimensions { font-size: .8rem; line-height: 1.8; font-variant-numeric: tabular-nums; margin-bottom: var(--space-3); }
.size-option__dimensions span { color: var(--color-muted); }
.size-option__tagline { font-size: .8rem; margin-bottom: var(--space-4); }
.size-option__select { display: flex; justify-content: space-between; align-items: center; gap: var(--space-2); min-height: 44px; width: 100%; margin-top: auto; padding: 8px 12px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: white; color: var(--color-primary); font-weight: 700; font-size: .85rem; cursor: pointer; }
.size-option__select:hover { background: var(--color-primary-soft); border-color: var(--color-primary); }
.size-option__select svg { width: 16px; height: 16px; visibility: hidden; }
.size-option__select[aria-pressed="true"] svg { visibility: visible; }
.size-option__select[aria-pressed="true"] { background: var(--color-primary); border-color: var(--color-primary); color: white; }
.size-direction { display: grid; grid-template-columns: 1.4fr 1fr 1fr; align-items: start; gap: var(--space-6); margin-top: 56px; padding: var(--space-6); border-radius: var(--radius-lg); background: var(--color-surface-subtle); }
.size-direction p { font-size: .9rem; margin-bottom: 0; }
.size-direction__example h3 { font-size: 1.1rem; margin-top: var(--space-4); }
.size-direction__paper { display: grid; place-items: center; width: 56px; height: 76px; border: 1px solid var(--color-primary); border-radius: 3px; background: white; color: var(--color-primary); box-shadow: var(--shadow-sm); }
.size-direction__paper--landscape { width: 76px; height: 56px; margin-top: 20px; color: var(--color-accent); border-color: var(--color-accent); }
.size-direction__paper svg { width: 28px; height: 28px; }
.size-reference > p:not(.eyebrow) { color: var(--color-muted); max-width: 700px; }
.size-reference .table-scroll { margin-top: var(--space-5); }
.size-reference .data-table { width: 100%; font-variant-numeric: tabular-nums; }
.size-reference tbody th { text-align: left; font-weight: 700; background: transparent; }
.size-reference td, .size-reference th { white-space: nowrap; }
.size-printing { display: grid; grid-template-columns: 1fr 1.65fr; gap: 48px; margin-top: 56px; padding-top: 40px; border-top: 1px solid var(--color-border); }
.size-printing__steps { display: grid; gap: var(--space-5); list-style: none; counter-reset: print-step; margin: 0; padding: 0; }
.size-printing__steps li { position: relative; padding-left: 48px; counter-increment: print-step; }
.size-printing__steps li::before { content: counter(print-step, decimal-leading-zero); position: absolute; left: 0; top: 0; color: var(--color-accent); font-weight: 750; font-size: 1.2rem; }
.size-printing__steps h3 { font-size: 1.05rem; }
.size-printing__steps p { color: var(--color-muted); font-size: .9rem; margin: 0; }

/* Stack the artwork before its readable dimensions; its SVG coordinate system never changes. */
@media (max-width: 850px) {
    .size-guide__hero { align-items: flex-start; flex-direction: column; gap: var(--space-5); }
    .size-comparison__heading { align-items: flex-start; flex-direction: column; }
    .size-comparison__body { grid-template-columns: minmax(0, 1fr); }
    .size-comparison__art > svg { max-height: 430px; }
    .size-details { display: grid; grid-template-columns: 1fr 1fr; column-gap: var(--space-5); }
    .size-details > .eyebrow, .size-details h3, .size-details__tagline, .size-details__note { grid-column: 1 / -1; }
    .size-details__dimensions { margin: 0 0 var(--space-4); }
    .size-options__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .size-direction { grid-template-columns: 1fr 1fr; }
    .size-direction > div:first-child { grid-column: 1 / -1; }
    .size-guide__section-heading { align-items: flex-start; flex-direction: column; gap: 0; }
}
@media (max-width: 540px) {
    .size-guide { padding-top: var(--space-3); }
    .size-guide__title-break { display: none; }
    .size-comparison__heading, .size-details, .size-direction { padding: var(--space-5); }
    .size-comparison__art { padding-inline: var(--space-2); }
    .size-details { display: block; }
    .size-details__dimensions { margin-block: var(--space-5); }
    .size-option { padding: var(--space-4); }
    .size-options__grid { gap: var(--space-3); }
    .size-direction { gap: var(--space-5); }
    .size-printing { grid-template-columns: 1fr; gap: var(--space-6); }
    .size-reference .data-table { font-size: .8rem; }
    .size-reference td, .size-reference th { padding: 12px 8px; }
}