/* The reference's airy daylight image, anchored at the bottom to retain the leaves. */
.home-hero{font-family:'Hero Noto Sans JP','Noto Sans JP',Meiryo,sans-serif;color:#082d4d;position:relative;isolation:isolate;overflow:hidden;background:#e9f5fc url('/assets/hero-daylight-v1.webp') center bottom/cover no-repeat}
.home-hero-inner{position:relative;width:calc(100% - 80px);max-width:1200px;min-height:540px;margin:0 auto;padding:32px 0;box-sizing:border-box;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:32px;align-items:center}
.home-hero-copy{position:relative;z-index:3;min-width:0;box-sizing:border-box}
.home-hero-title{margin:0;font-size:clamp(44px,4.1vw,58px);font-weight:900;line-height:1.42;letter-spacing:-.035em;color:#062b4b}
.home-hero-title span{display:block;white-space:nowrap}
.home-hero-description{margin:21px 0 0;font-size:21px;font-weight:400;line-height:1.8;letter-spacing:-.025em;white-space:nowrap}
.home-hero-actions{display:flex;align-items:stretch;gap:14px;margin-top:27px}
.home-hero-button{display:inline-flex;justify-content:center;align-items:center;gap:12px;box-sizing:border-box;min-height:58px;padding:14px 20px;border:1.5px solid #39759c;border-radius:7px;font-size:17px;font-weight:700;line-height:1.5;white-space:nowrap;text-decoration:none;transition:background-color .18s,box-shadow .18s}
.home-hero-button svg{width:10px;height:18px;flex-shrink:0}
.home-hero-button-primary{background:#37789f;color:#fff;box-shadow:inset 0 1px 0 #ffffff25}
.home-hero-button-secondary{background:#ffffffde;color:#082e50;min-width:190px}
.home-hero-button-primary:hover{background:#285f83;box-shadow:0 5px 18px #24557125}
.home-hero-button-secondary:hover{background:#eaf5fc}
.home-hero-button:focus-visible{outline:3px solid #25597c;outline-offset:5px}
.home-hero-visual{position:relative;min-width:0;width:100%;aspect-ratio:1.4;z-index:2}
.home-hero .image-gallery,.home-hero .image-gallery-content,.home-hero .image-gallery-slide-wrapper,.home-hero .image-gallery-swipe,.home-hero .image-gallery-slides{height:100%;width:100%;overflow:visible}
.home-hero .image-gallery-slide{position:absolute;inset:0;width:100%;height:100%;margin:0;transform:none!important;opacity:0;transition:opacity .3s ease}
.home-hero .image-gallery-slide.image-gallery-center{opacity:1}
.home-hero .image-gallery-slide:not(.image-gallery-center){visibility:hidden}
.home-hero .own-collage-hero{height:100%;width:100%;aspect-ratio:auto;overflow:visible;padding:0}
.home-hero .own-collage-hero .own-collage-sheet{border:3px solid #fff;border-radius:7px;box-shadow:0 12px 26px #234e701a,0 2px 5px #234e7010;max-height:none;height:auto;aspect-ratio:var(--screen-aspect,16/9);transform-origin:center}
.home-hero .own-collage-hero .own-collage-sheet:nth-child(1){left:4%;right:auto;top:auto;bottom:1%;width:76%;z-index:3;transform:none}
.home-hero .own-collage-hero .own-collage-sheet:nth-child(2){left:1%;right:auto;top:2%;bottom:auto;width:62%;z-index:2;transform:rotate(-1deg);opacity:1}
.home-hero .own-collage-hero .own-collage-sheet:nth-child(3){left:auto;right:1%;top:10%;bottom:auto;width:66%;z-index:1;transform:rotate(1deg)}
/* Three substantial screens stack from back to front; no small satellite thumbnails. */
.home-hero .own-collage-featured .own-collage-sheet:nth-child(1){left:2%;top:3%;bottom:auto;width:74%;z-index:1;transform:rotate(-1deg)}
.home-hero .own-collage-featured .own-collage-sheet:nth-child(2){left:auto;right:1%;top:16%;width:65%;z-index:2;transform:rotate(1deg)}
.home-hero .own-collage-featured .own-collage-sheet:nth-child(3){left:4%;right:auto;top:auto;bottom:1%;width:88%;z-index:3;transform:none}
/* Slides 3–5: larger back screens, staggered into one connected stack. */
.home-hero .image-gallery-slide:nth-child(n+3) .own-collage-sheet:nth-child(1){left:6%;width:84%}
.home-hero .image-gallery-slide:nth-child(n+3) .own-collage-sheet:nth-child(2){left:1%;top:1%;width:82%;z-index:1}
.home-hero .image-gallery-slide:nth-child(n+3) .own-collage-sheet:nth-child(3){right:1%;top:23%;width:80%;z-index:2}
.home-hero .image-gallery-slide:nth-child(3) .own-collage-sheet:nth-child(1){width:88%}
.home-hero .image-gallery-slide:nth-child(4) .own-collage-sheet:nth-child(1){width:78%}
/* Approved course A: preserve each image's own ratio and reveal both rear charts. */
.home-hero .image-gallery-slide .own-collage-course .own-collage-sheet:nth-child(1){left:3%;right:auto;top:auto;bottom:1%;width:62%;z-index:3;transform:none}
.home-hero .image-gallery-slide .own-collage-course .own-collage-sheet:nth-child(2){left:1%;right:auto;top:1%;bottom:auto;width:68%;z-index:1;transform:rotate(-1deg)}
.home-hero .image-gallery-slide .own-collage-course .own-collage-sheet:nth-child(3){left:auto;right:1%;top:10%;bottom:auto;width:62%;z-index:2;transform:rotate(1deg)}
.home-hero .image-gallery-bullets{position:absolute;left:0;right:0;bottom:-18px;width:100%;z-index:5;text-align:center}
.home-hero .image-gallery-bullets .image-gallery-bullet{width:8px;height:8px;padding:0;margin:0 7px;border:1px solid #477da3;box-shadow:none;background:#fff9}
.home-hero .image-gallery-bullets .image-gallery-bullet.active{background:#477da3;transform:none}
.home-hero .image-gallery-bullets .image-gallery-bullet:focus-visible{outline:2px solid #082d4d;outline-offset:4px}
@media(min-width:1001px) and (max-width:1199px){
 .home-hero-inner{min-height:490px;gap:24px}.home-hero-title{font-size:4vw}.home-hero-description{font-size:1.65vw}.home-hero-actions{gap:10px}.home-hero-button{font-size:15px;padding:14px 15px;gap:8px;min-height:56px}.home-hero-button-secondary{min-width:160px}
}
@media(max-width:1000px){
 .home-hero{background-position:left bottom}
 .home-hero-inner{display:flex;flex-direction:column;align-items:stretch;width:calc(100% - 32px);max-width:680px;min-height:0;padding:22px 0 27px;gap:0}
 .home-hero-copy{width:100%;padding:0}.home-hero-title{font-size:clamp(30px,8.7vw,54px);line-height:1.42;letter-spacing:-.045em}
 .home-hero-description{margin-top:12px;font-size:15px;line-height:1.8;white-space:normal;letter-spacing:0}.home-hero-description span{display:inline-block}
 .home-hero-actions{display:grid;grid-template-columns:1.45fr 1fr;gap:8px;margin-top:16px}
 .home-hero-button,.home-hero-button-secondary{min-height:50px;padding:10px 8px;font-size:14px;gap:8px;min-width:0}.home-hero-button svg{width:7px;height:14px}
 .home-hero-visual{aspect-ratio:1.45;margin:13px 0 0}.home-hero .own-collage-hero .own-collage-sheet{border-width:2px;border-radius:5px;box-shadow:0 6px 14px #29648a1a}
 .home-hero .image-gallery-bullets{bottom:-15px}.home-hero .image-gallery-bullets .image-gallery-bullet{width:7px;height:7px;margin:0 6px}
}
@media(min-width:768px) and (max-width:1000px){
 .home-hero-inner{width:calc(100% - 64px);padding:30px 0;max-width:640px}.home-hero-title{font-size:48px}.home-hero-description{font-size:19px}.home-hero-actions{display:flex}.home-hero-button{font-size:17px;padding-inline:24px}.home-hero-visual{width:82%;align-self:center;aspect-ratio:1.45;margin-top:22px}
}
@media(max-width:359px){.home-hero-title{font-size:8.7vw}.home-hero-button,.home-hero-button-secondary{font-size:12px;gap:5px;padding-inline:6px}}
@media(prefers-reduced-motion:reduce){.home-hero-button,.home-hero .image-gallery-slide{transition:none}}