/* ─── Reset & Base ─────────────────────────────────────────── */
*{box-sizing:border-box}
html{font-size:62.5%}
html,body{width:100%;height:100vh;margin:0;border:none;font-family:"Noto Serif JP",serif;font-weight:400;font-style:normal}
body{font-size:1.6rem;font-weight:500}
strong{font-weight:700}
.note{font-size:1.3rem}

/* ─── Layout wrappers ─────────────────────────────────────── */
.wrapper{display:flex;flex-direction:column;background:#000}
@media(min-width:1100px){
  .wrapper{flex-direction:row;height:100%;min-height:100vh}
}

/* ─── Navigation bar ──────────────────────────────────────── */
nav{
  position:fixed;top:0;right:0;height:100vh;flex:0 0 64px;background:#fff;
  display:flex;align-items:center;gap:24px;padding:24px 8px;
  writing-mode:vertical-rl;text-orientation:mixed;white-space:nowrap;
  font-family:"Noto Serif JP",serif;font-size:2.4rem;font-weight:600;letter-spacing:2px;line-height:1.2;
  transform:translateX(120%);opacity:0;
  transition:transform .9s ease-out,opacity .9s ease-out;will-change:transform,opacity
}
nav.slide-in{transform:translateX(0);opacity:1}
nav span{font-family:"Noto Sans JP",sans-serif;font-size:1.2rem;letter-spacing:.12em}
@media(min-width:1100px){
  nav{font-size:2.8rem;padding:24px 12px;transform:translateX(100%);transition:transform .8s ease}
  nav span{font-size:1.4rem}
}

/* ─── Header / Visual area ───────────────────────────────── */
.header{width:100%;height:75vh;overflow:hidden;background:#fff}
.section_mv{height:100%;display:flex;justify-content:center;align-items:center;opacity:0;transition:opacity 1s}
.section_mv.fade-in{opacity:1}
@media(min-width:1100px){
  .header{position:sticky;top:0;width:50%;height:100vh;min-height:640px}
}

/* ─── Photo mosaic (OpenSeadragon) ────────────────────────── */
#photomozic{
  position:absolute;inset:0;width:100%;height:100%;line-height:0;overflow:hidden;
  width:100vw!important;max-width:100vw!important;min-width:100vw!important;
  opacity:0;transition:opacity var(--crossDur,4000ms) linear
}
#photomozic.show{opacity:1}
#photomozic,
#photomozic>.openseadragon-container,
#photomozic .openseadragon-canvas,
#photomozic canvas{margin:0;padding:0;width:100%;height:75vh;display:block}
@media(min-width:1100px){
  #photomozic,
  #photomozic>.openseadragon-container,
  #photomozic .openseadragon-canvas,
  #photomozic canvas{position:absolute;inset:0;width:100%!important;height:100%!important}
  #photomozic{box-shadow:inset -260px 0 0 0 #000}
}

/* ─── Scrollable body ─────────────────────────────────────── */
.body{
  width:100%;padding:24px 48px 24px 24px;background:#fff;
  overflow-y:auto;overflow-x:hidden;scrollbar-width:none;-ms-overflow-style:none
}
.body::-webkit-scrollbar{display:none}
@media(min-width:1100px){
  .body{width:50%;height:100vh;padding:64px 64px 64px 64px}
}

/* ─── Typography ──────────────────────────────────────────── */
h1{margin:0;font-size:3rem;line-height:4rem}
h1 span{font-size:4rem}
h2{margin:0;font-size:2.7rem;font-weight:600;writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:2px;position:relative}
h2 span{display:inline-block;font-size:1.2rem;margin-top:16px}
h3{border-bottom:1px solid #eee;padding:8px 0;text-align:center}
p{font-size:1.4rem;line-height:2.6rem}
.mv__txt{max-width:400px;position:relative}
@media(min-width:1100px){
  p{font-size:1.6rem;line-height:2.8rem}
  h1{font-size:4rem;line-height:6rem}
  h1 span{font-size:6rem}
  h2{margin:0;font-size:3.2rem;font-weight:600;writing-mode:vertical-rl;text-orientation:mixed;letter-spacing:2px;position:relative}
}

/* ─── Sections ───────────────────────────────────────────── */
.section__header{display:flex;gap:24px;align-items:center;justify-content:center;padding:80px}
.section_about{display:flex;flex-direction:column;gap:40px;margin-bottom:120px}
.section_about h4{margin:40px 0;font-size:1.6rem;text-align:center}
.section_about h4::before{content:'/';margin-right:24px}
.section_about h4::after{content:'/';margin-left:24px}
.section_about .section__block{margin-bottom:80px}
.section_about dt{font-weight:700}
.section_about dd{margin:0 0 0 0;line-height:2.6rem}
.section_about dd::before{content:'・'}
.section_about h2::before,
.section_remembrance h2::before{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  writing-mode:horizontal-tb;font-weight:500;font-size:7rem;color:#515151;opacity:.1;pointer-events:none
}
.section_about h2::before{content:'About'}
.section_remembrance{display:flex;flex-direction:column;gap:40px;margin-bottom:240px}
.section_remembrance ul{margin-bottom:32px}
.section_remembrance h2::before{content:'Remembrance'}
@media(min-width:1100px){
  .section_about{margin-bottom:240px}
}

/* ─── Lists ──────────────────────────────────────────────── */
ul{margin:0;padding:0;font-size:1.5rem;line-height:2.4rem;letter-spacing:1px}
li{list-style:none}
li span{font-size:1.4rem}
dt{font-weight:700}
dd{margin:0 0 24px;font-size:1.5rem}

/* ─── Decorative lines ───────────────────────────────────── */
.decor-lines{position:absolute;width:153px;height:152px;pointer-events:none}
.decor-top-right{top:0;right:0;transform:translate(50%,-50%)}
.decor-bottom-left{bottom:0;left:0;transform:translate(-100%,100%)}

/* ─── Animated decorative lines ──────────────────────────── */
@keyframes slide-up{0%{transform:translate(0)}50%{transform:translate(10px,-10px)}100%{transform:translate(0)}}
@keyframes slide-down{0%{transform:translate(0)}50%{transform:translate(-10px,10px)}100%{transform:translate(0)}}
.line-up{animation:slide-up 3s ease-in-out infinite alternate}
.line-down{animation:slide-down 3s ease-in-out infinite alternate}

/* ─── Intro overlay & typing ─────────────────────────────── */
#introOverlay{
  position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000;z-index:9999;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding-bottom:env(safe-area-inset-bottom,0);
  overflow:hidden;transition:opacity 1s;animation:overlayIn .5s forwards
}
@supports(height:100dvh){
  #introOverlay{height:100dvh}
}
@keyframes overlayIn{to{opacity:1}}
#introOverlay.hide-overlay{animation:none;opacity:0;pointer-events:none;transition:opacity var(--coverFadeDur,1500ms) ease-out}
#introText{
  color:#fff;font-family:"Noto Serif JP",serif;font-size:1.6rem;margin-bottom:20px;
  overflow:hidden;white-space:nowrap;width:0;letter-spacing:2px;
  animation:typing 1.5s steps(24,end) .3s forwards
}
@keyframes typing{from{width:0}to{width:31ch}}
@media(min-width:1100px){#introText{font-size:2rem}}

/* ─── Former photo overlay ───────────────────────────────── */
#formerOverlay{
  position:absolute;inset:0;background:url('/images/shioya_former.jpg')center/cover no-repeat;
  display:none;opacity:0;z-index:2;pointer-events:none;
  transition:opacity 1s linear,transform 1s linear;transform:scale(1)
}
@keyframes photoFadeIn{
  0%{opacity:0;transform:scale(calc(var(--photoScale,1)*1))}
  70%,100%{opacity:1;transform:scale(var(--photoScale,1))}
}
#formerOverlay.show-photo{display:block;animation:photoFadeIn var(--photoFadeInDur) ease-out forwards}
#formerOverlay.fade-out{animation:none;transition:opacity 1s linear;opacity:0;transform:scale(1)}

/* ─── Scroll-reveal utility ─────────────────────────────── */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .9s ease-out,transform .9s ease-out}
.reveal.in-view{opacity:1;transform:translateY(0)}

/* ─── Misc alignment ─────────────────────────────────────── */
.section_info,.section_contact{text-align:center}