.yakousha {
    --yk-ink: #15252a;
    --yk-muted: #536064;
    --yk-paper: #f0ece3;
    --yk-gold: #e1c391;
    --yk-brown: #634a31;
    color: var(--yk-ink);
    font-size: 1rem;
    line-height: 1.85;
    overflow-wrap: anywhere;
}
.yakousha h1, .yakousha h2, .yakousha h3 { line-height: 1.5; font-weight: 700; }
.yakousha h2 { font-size: clamp(1.45rem, 2.5vw, 2rem); letter-spacing: .025em; margin-bottom: 1.25rem; }
.yakousha h3 { font-size: 1.12rem; }
.yakousha a { text-underline-offset: .25em; }
.yakousha a:focus-visible, .yakousha summary:focus-visible { outline: 3px solid #ac7530; outline-offset: 5px; }
.yakousha section[id] { scroll-margin-top: 1.5rem; }
.yk-hero { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 1rem; padding: 3.5rem 3rem; background: #0a151d; color: #f9f4e9; border-radius: 3px; }
.yk-hero-copy { position: relative; z-index: 1; }
.yk-eyebrow { color: var(--yk-gold); font-size: .9rem; letter-spacing: .16em; margin-bottom: 1rem; }
.yk-hero h1 { font-size: clamp(3.3rem, 6vw, 5rem); letter-spacing: .15em; line-height: 1.2; margin-bottom: 1.6rem; }
.yk-hero h1 span { display: block; color: var(--yk-gold); font-size: .8rem; letter-spacing: .42em; margin-top: .7rem; }
.yk-catch { font-size: clamp(1.5rem, 2.6vw, 2rem); font-weight: 600; line-height: 1.65; letter-spacing: .05em; margin-bottom: 1.4rem; }
.yk-hero-description { color: #d6dcdf; margin-bottom: 1.6rem; }
.yk-hero-visual { min-width: 0; }
.yk-hero-visual img { width: 100%; height: auto; display: block; border-radius: 50%; }
.yk-button { display: inline-flex; align-items: center; justify-content: space-between; gap: 2rem; min-height: 50px; padding: .65rem 1.3rem; border: 1px solid transparent; border-radius: 2px; font-weight: 700; text-decoration: none; }
.yk-button-light { color: #17242b; background: #eddbb9; }
.yk-button-light:hover { color: #17242b; background: #fff1d8; }
.yk-button-dark { color: white; background: var(--yk-ink); }
.yk-button-dark:hover { color: white; background: var(--yk-brown); }
.yk-hero-note { color: #bfc9ce; font-size: .8rem; margin: 1rem 0 0; }
.yk-page-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: .25rem 2rem; padding: 1.05rem 0; border-bottom: 1px solid #d7d8d4; }
.yk-page-nav a { color: var(--yk-ink); padding: .55rem .3rem; font-size: .9rem; text-decoration: none; }
.yk-page-nav a:hover { text-decoration: underline; }
.yk-section { padding: 4.2rem 2.2rem; }
.yk-label { color: var(--yk-brown); font-size: .77rem; letter-spacing: .16em; font-weight: 700; margin: 0 0 1rem; }
.yk-about { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: start; }
.yk-about-lead { color: var(--yk-muted); margin-top: 1.6rem; }
.yk-prose p { margin-bottom: 1.3rem; }
.yk-emphasis { font-weight: 600; }
.yk-document-tags { display: flex; flex-wrap: wrap; gap: .5rem; }
.yk-document-tags span { font-size: .8rem; padding: .15rem .65rem; border: 1px solid #cfcfc7; background: #fff; }
.yk-paper { background: var(--yk-paper); }
.yk-section-intro { color: var(--yk-muted); margin-bottom: 2.3rem; }
.yk-steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.5rem; padding: 0; margin: 0; list-style: none; }
.yk-step-number { display: block; font-size: 2rem; font-weight: 400; color: var(--yk-brown); border-bottom: 1px solid #cfc6b7; padding-bottom: .7rem; margin-bottom: 1.2rem; }
.yk-steps p, .yk-features p { color: var(--yk-muted); margin-bottom: 0; }
.yk-recommend { padding-bottom: 3.5rem; }
.yk-recommend h2 { font-size: clamp(1.3rem, 2.1vw, 1.7rem); }
.yk-recommend-list { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem 2rem; margin: 1.8rem 0 0; padding: 0; list-style: none; }
.yk-recommend-list li { display: flex; gap: 1rem; align-items: flex-start; }
.yk-recommend-list i { color: var(--yk-brown); font-size: 1.3rem; flex-shrink: 0; }
.yk-works-section { background: #e9ece9; }
.yk-section-heading { display: flex; justify-content: space-between; gap: 2rem; align-items: end; margin-bottom: 1.8rem; }
.yk-section-heading h2 { margin-bottom: 0; }
.yk-section-heading > p { color: var(--yk-muted); margin: 0; }
.yk-works { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.75rem; }
.yk-work { display: flex; flex-direction: column; min-width: 0; background: white; border: 1px solid #d5d8d1; }
.yk-work-image { aspect-ratio: 16 / 9; background: #f3f0e9; overflow: hidden; border-bottom: 1px solid #e4e3dc; }
.yk-work-image img { display: block; width: 100%; height: 100%; object-fit: contain; }
.yk-image-placeholder { height: 100%; display: flex; flex-direction: column; justify-content: center; align-items: center; color: var(--yk-muted); gap: .5rem; }
.yk-image-placeholder i { font-size: 2.5rem; }
.yk-work-body { display: flex; flex-direction: column; flex: 1; padding: 1.8rem; }
.yk-work-body .yk-label { margin-bottom: .45rem; }
.yk-work-body h3 { font-size: 1.8rem; margin-bottom: .6rem; }
.yk-work-tagline { color: var(--yk-muted); margin-bottom: 1.5rem; min-height: 3.7em; }
.yk-work-facts { --bs-gutter-x: 0; display: grid; margin-left: 0; margin-right: 0; grid-template-columns: 1fr 1fr; border-top: 1px solid #e2e3de; border-bottom: 1px solid #e2e3de; padding: 1rem 0; gap: .8rem 1rem; margin-bottom: .65rem; }
.yk-work-facts > div { width: auto; margin-top: 0; }
.yk-work-facts dt { color: var(--yk-muted); font-size: .8rem; font-weight: 400; }
.yk-work-facts dd { font-size: 1rem; font-weight: 600; margin-bottom: 0; }
.yk-work-note { color: var(--yk-muted); font-size: .8rem; margin-bottom: 1.5rem; }
.yk-work-purchase { margin-top: auto; }
.yk-price { font-size: 1.6rem; font-weight: 700; line-height: 1.6; margin-bottom: 1rem; }
.yk-price span { display: block; color: var(--yk-muted); font-size: .8rem; font-weight: 400; }
.yk-work .yk-button { width: 100%; }
.yk-image-note { color: var(--yk-muted); font-size: .8rem; margin: 1.2rem 0 0; }
.yk-empty { grid-column: 1 / -1; background: white; padding: 2rem; }
.yk-empty a, .yk-faq a { color: var(--yk-brown); }
.yk-features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem; margin-top: 2rem; }
.yk-features i { display: block; color: var(--yk-brown); font-size: 1.8rem; margin-bottom: .8rem; }
.yk-features h3 { margin-bottom: .8rem; }
.yk-faq { border-top: 1px solid #d7d8d4; display: grid; grid-template-columns: 1fr 2fr; gap: 3rem; }
.yk-faq > div > p:not(.yk-label) { color: var(--yk-muted); }
.yk-faq details { border-bottom: 1px solid #d7d8d4; }
.yk-faq summary { cursor: pointer; padding: 1.2rem .25rem; font-weight: 600; }
.yk-faq details p { color: var(--yk-muted); padding: 0 .25rem 1.25rem; margin-bottom: 0; }
.yk-closing { text-align: center; padding: 3.7rem 1.4rem; background: #15252a; color: #f9f4e9; }
.yk-closing .yk-label { color: var(--yk-gold); }
.yk-closing > p:not(.yk-label) { color: #ccd4d5; margin-bottom: 1.7rem; }
.yk-coffee-link { display: block; width: fit-content; margin: 1.4rem auto 0; color: #e7d7b7; font-size: .9rem; padding: .3rem; }
.yk-coffee-link:hover { color: white; }
@media (max-width: 991px) {
    .yk-hero { padding: 2.5rem 1.8rem; grid-template-columns: 1.2fr 1fr; }
    .yk-section { padding: 3.2rem 1.5rem; }
    .yk-about { gap: 2rem; }
    .yk-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.8rem; }
    .yk-features { gap: 1.5rem; }
    .yk-faq { gap: 1.5rem; }
    .yk-work-body { padding: 1.3rem; }
}
@media (max-width: 767px) {
    .yk-hero { grid-template-columns: 1fr; padding: 2.3rem 1.4rem 1.7rem; gap: 1.7rem; }
    .yk-hero h1 { font-size: 3.5rem; }
    .yk-hero-visual { width: min(100%, 360px); margin: 0 auto; }
    .yk-hero-description { max-width: 32rem; }
    .yk-desktop-break { display: none; }
    .yk-page-nav { gap: 0 .8rem; }
    .yk-page-nav a { font-size: .82rem; }
    .yk-section { padding: 2.7rem 1.1rem; }
    .yk-about, .yk-works, .yk-faq, .yk-features, .yk-recommend-list { grid-template-columns: 1fr; }
    .yk-about { gap: 1rem; }
    .yk-about-lead { margin-top: .8rem; }
    .yk-section-heading { display: block; }
    .yk-section-heading > p { margin-top: 1rem; }
    .yk-work-tagline { min-height: 0; }
    .yk-work-body { padding: 1.4rem; }
    .yk-faq { gap: .6rem; }
    .yk-faq > div:first-child > p:last-child { margin-bottom: .6rem; }
    .yk-features { gap: 1.8rem; }
    .yk-features > div { padding-bottom: 1.5rem; border-bottom: 1px solid #e0e0d9; }
    .yk-features > div:last-child { border-bottom: 0; padding-bottom: 0; }
}
@media (max-width: 374px) {
    .yk-steps { grid-template-columns: 1fr; gap: 1.4rem; }
    .yk-step-number { font-size: 1.7rem; margin-bottom: .7rem; }
    .yk-hero h1 { font-size: 3rem; }
    .yk-hero-note { font-size: .75rem; }
    .yk-work-body { padding: 1.1rem; }
}

/* 作品数が増えても、ガイドと単品・セットを独立して繰り返す。 */
.yk-first-link { display: block; width: fit-content; color: #eddbb9; margin-top: .9rem; padding: .4rem 0; font-size: .9rem; }
.yk-first-link:hover { color: white; }
.yk-text-link { color: var(--yk-brown); text-underline-offset: .3em; }
.yk-choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.yk-choice { display: flex; flex-direction: column; min-width: 0; padding: 1.3rem 1.5rem; background: #faf8f3; border: 1px solid #d3cbbc; color: var(--yk-ink); text-decoration: none; }
.yk-choice:hover { color: var(--yk-ink); border-color: var(--yk-brown); background: #fffdf8; }
.yk-choice .yk-label { margin-bottom: .35rem; }
.yk-choice h3 { font-size: 1.25rem; margin-bottom: .5rem; }
.yk-choice p { font-size: .9rem; margin-bottom: 1rem; }
.yk-choice-footer { display: flex; flex-wrap: wrap; gap: .5rem 1rem; justify-content: space-between; margin-top: auto; font-size: .82rem; }
.yk-choice-link { color: var(--yk-brown); text-decoration: underline; }
.yk-work > .yk-label { padding: .65rem 1.3rem; margin: 0; }
.yk-bundles-section { background: var(--yk-paper); border-top: 1px solid #d3cbbc; }
.yk-bundle .yk-work-image { aspect-ratio: 3 / 1; }
.yk-bundle .yk-work-body h3 { font-size: 1.25rem; }
.yk-bundle .yk-work-tagline { min-height: 0; margin-bottom: .75rem; }
.yk-bundle-members { display: flex; flex-wrap: wrap; gap: .25rem 1rem; padding: 0; list-style: none; font-size: .85rem; }
.yk-bundle-members a { color: var(--yk-brown); }
.yk-saving { color: var(--yk-brown); font-size: .9rem; margin-bottom: .8rem; }
.yk-saving small { display: block; color: var(--yk-muted); }
@media (max-width: 767px) {
    .yk-choices { grid-template-columns: 1fr; }
    .yk-choice { padding: 1.1rem; }
}

/* 新作ホラーは雨夜の色と静かな斜線で紹介する。 */
.yk-horror-feature {
    display: grid;
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: center;
    margin: 2rem 0 3rem;
    background: repeating-linear-gradient(108deg, transparent 0 30px, #b2c6ca08 31px, transparent 32px 62px), linear-gradient(130deg, #11191d, #203338);
    color: #f3eee4;
    border: 1px solid #405357;
    line-height: 1.85;
    overflow-wrap: anywhere;
}
.yk-horror-visual { min-width: 0; padding: 1.3rem; }
.yk-horror-visual img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: contain; box-shadow: 0 12px 30px #0004; }
.yk-horror-copy { min-width: 0; padding: 2.3rem 2.3rem 2.3rem 1.2rem; }
.yk-horror-label { color: #c0d6d4; font-size: .77rem; font-weight: 700; letter-spacing: .17em; margin: 0 0 1.1rem; }
.yk-horror-genre { color: #d6d5ca; font-size: .85rem; margin: 0 0 .2rem; }
.yk-horror-feature h2 { color: #f3eee4; font-size: clamp(2.2rem, 4vw, 3.3rem); font-weight: 700; letter-spacing: .17em; line-height: 1.5; margin: 0 0 1rem; }
.yk-horror-catch { font-size: 1.12rem; font-weight: 600; line-height: 1.9; margin-bottom: 1rem; }
.yk-horror-description { font-size: .9rem; color: #d4dcd9; }
.yk-horror-spec { color: #ece5d6; font-size: .83rem; padding-top: .9rem; border-top: 1px solid #5b6b6c; }
.yk-horror-caution { color: #cbd5d2; font-size: .77rem; }
.yk-horror-purchase { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; margin-top: 1.5rem; }
.yk-horror-price { font-size: 1.7rem; font-weight: 700; line-height: 1.5; margin: 0; }
.yk-horror-price span { display: block; font-size: .75rem; font-weight: 400; color: #d4dcd9; }
.yk-horror-button { display: inline-flex; justify-content: space-between; align-items: center; gap: 1.3rem; min-height: 48px; max-width: 100%; padding: .65rem 1.1rem; background: #e7dfcc; color: #14272b; text-decoration: none; font-size: .9rem; font-weight: 700; border: 1px solid #e7dfcc; }
.yk-horror-button:hover { color: #14272b; background: #fff6e2; }
.yk-horror-button:focus-visible { outline: 3px solid #f5dfaa; outline-offset: 4px; }
.yk-work-horror { border-color: #537373; }
.yk-work-horror > .yk-label { background: #203338; color: #e4e9df; }
.yk-horror-tag { width: fit-content; font-size: .75rem; color: #23494a; background: #e5edeb; padding: .2rem .6rem; margin: 0 0 .8rem; }
.yk-choice-horror { border-color: #78918c; background: #eef2ef; }
.yk-content-note { color: #385153; background: #edf1ed; border-left: 3px solid #567976; font-size: .85rem; line-height: 1.8; padding: .8rem 1rem; margin-bottom: 1.2rem; }
.yk-horror-intro { background: #1b2e32; color: #f3eee4; padding: 1.5rem; margin: 1.2rem 0; line-height: 1.85; }
.yk-horror-intro > p:last-child { color: #d4dcd9; font-size: .9rem; }
@media (max-width: 767px) {
    .yk-horror-feature { grid-template-columns: minmax(0, 1fr); }
    .yk-horror-visual { padding: 1rem 1rem 0; }
    .yk-horror-visual img { max-width: 420px; margin: auto; }
    .yk-horror-copy { padding: 1.5rem; }
    .yk-horror-feature h2 { font-size: 2.4rem; }
}

/* 4作品セットは既存カードの配色と余白を使い、COLLECTIONの先頭で強調する。 */
.yk-bundle-images { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: center; }
.yk-bundle-images img { height: auto; }
.yk-bundle-featured { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-color: var(--yk-brown); }
.yk-bundle-featured > .yk-label { grid-column: 1 / -1; background: var(--yk-ink); color: var(--yk-gold); }
.yk-bundle-featured .yk-work-image { aspect-ratio: auto; grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 1rem; gap: .5rem; border-bottom: 0; }
.yk-bundle-featured .yk-work-body h3 { font-size: 1.5rem; }
.yk-bundle-featured h3 span { display: block; }
.yk-bundle-featured .yk-work-tagline { color: var(--yk-ink); font-size: 1.12rem; font-weight: 600; }
.yk-bundle-summary { font-size: .85rem; color: var(--yk-muted); }
@media (max-width: 767px) {
    .yk-bundle-featured { grid-template-columns: minmax(0, 1fr); }
}