/* ==========================================================================
   学生によるCG — gallery styles
   ========================================================================== */

:root{
  color-scheme:dark;
  --bg:#08080b;
  --bg-2:#0d0e13;
  --panel:#12131a;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);
  --text:#f2f0ee;
  --text-2:#a8a7b3;
  --text-3:#6f6e7b;
  --amber:#ff9a3c;
  --amber-soft:#ffca8a;
  --ease:cubic-bezier(.22,.68,.24,1);
  --shadow:0 24px 60px rgba(0,0,0,.55);
  --sans:"Helvetica Neue",-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  /* 拗促音や句読点が行頭に来ないようにする */
  line-break:strict;
  word-break:normal;
  overflow-wrap:break-word;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.25;margin:0;font-weight:700;letter-spacing:.01em}
p{margin:0}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}

.kicker,.eyebrow{
  font-size:11px;font-weight:700;letter-spacing:.28em;text-transform:uppercase;
  color:var(--amber);margin:0 0 14px;
}
.nowrap{white-space:nowrap}

/* ===================== HERO ===================== */
.hero{
  position:relative;
  min-height:100vh;
  min-height:100svh;
  display:flex;align-items:center;
  padding:120px 6vw 140px;
  overflow:hidden;
  isolation:isolate;
}
.hero-bg{position:absolute;inset:-6%;z-index:-3}
.hero-bg img{
  width:100%;height:100%;object-fit:cover;object-position:50% 42%;
  filter:saturate(1.15) contrast(1.05);
  transform:scale(1.06);
  animation:heroDrift 34s var(--ease) infinite alternate;
}
@keyframes heroDrift{
  from{transform:scale(1.06) translate3d(0,0,0)}
  to{transform:scale(1.16) translate3d(-1.5%,-2%,0)}
}
.hero-veil{
  position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(120% 90% at 78% 22%, rgba(255,154,60,.20) 0%, transparent 55%),
    linear-gradient(100deg, rgba(8,8,11,.96) 0%, rgba(8,8,11,.86) 38%, rgba(8,8,11,.42) 68%, rgba(8,8,11,.72) 100%),
    linear-gradient(to top, var(--bg) 2%, transparent 40%);
}
.grain{
  position:absolute;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px, transparent 1px);
  background-size:3px 3px;
  mix-blend-mode:overlay;
}

.hero-inner{position:relative;max-width:720px;animation:riseIn 1s var(--ease) both}
@keyframes riseIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

.display{
  font-size:clamp(52px,11vw,132px);
  line-height:.94;
  letter-spacing:-.03em;
  margin:0 0 26px;
  font-weight:800;
}
.display .l1{display:block;color:var(--text)}
.display .l2{
  display:block;
  background:linear-gradient(96deg,var(--amber) 0%,var(--amber-soft) 42%,#fff 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.lead{color:var(--text-2);font-size:clamp(15px,1.6vw,18px);max-width:46ch}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:32px 0 0}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  padding:14px 28px;border-radius:999px;
  font-size:14px;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;
  transition:transform .25s var(--ease), background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease);
}
.btn.primary{background:var(--amber);color:#1a0d02}
.btn.primary:hover{transform:translateY(-2px);background:var(--amber-soft)}
.btn.ghost{border-color:var(--line-2);color:var(--text)}
.btn.ghost:hover{transform:translateY(-2px);border-color:var(--amber);color:var(--amber)}

.hero-meta{
  display:flex;align-items:center;gap:14px;margin-top:34px;
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--text-3);
}
.hero-meta .sep{width:34px;height:1px;background:var(--line-2)}

.scroll-cue{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);
  width:24px;height:38px;border:1px solid var(--line-2);border-radius:999px;
  display:grid;place-items:start center;padding-top:7px;
}
.scroll-cue span{
  width:3px;height:7px;border-radius:2px;background:var(--amber);
  animation:cue 1.9s var(--ease) infinite;
}
@keyframes cue{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(15px)}}

/* ===================== STICKY NAV ===================== */
.topbar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:14px 6vw;
  background:rgba(8,8,11,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:14px;letter-spacing:.04em}
.brand .mark{
  width:10px;height:10px;border-radius:3px;
  background:linear-gradient(135deg,var(--amber),#ff5f2e);
  box-shadow:0 0 14px rgba(255,154,60,.7);
}
.topbar-links{display:flex;gap:24px;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--text-3)}
.topbar-links a{transition:color .2s var(--ease)}
.topbar-links a:hover{color:var(--amber)}

/* ===================== SECTIONS ===================== */
.gallery-section{padding:96px 6vw 40px;max-width:1500px;margin:0 auto}
.section-head{max-width:620px;margin:0 0 34px}
.section-head h2{font-size:clamp(28px,4vw,44px);letter-spacing:-.02em;margin-bottom:14px}
.section-note{color:var(--text-3);font-size:13px}

.filters{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 40px}
.chip{
  padding:9px 20px;border-radius:999px;font-size:13px;font-weight:600;
  border:1px solid var(--line);color:var(--text-2);
  transition:all .22s var(--ease);
}
.chip:hover{border-color:var(--line-2);color:var(--text)}
.chip.is-on{background:var(--text);color:#0a0a0c;border-color:var(--text)}

/* ===================== GRID ===================== */
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:22px;
}
.card{margin:0;position:relative}
.card.wide{grid-column:span 2}
.card.is-hidden{display:none}

.shot{
  display:block;width:100%;
  position:relative;overflow:hidden;
  border-radius:18px;
  background:var(--panel);
  border:1px solid var(--line);
  aspect-ratio:4/3;
  transition:transform .5s var(--ease), border-color .35s var(--ease), box-shadow .5s var(--ease);
}
.card.wide .shot{aspect-ratio:16/9}
.shot img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .8s var(--ease), filter .5s var(--ease);
  filter:saturate(.94) brightness(.94);
}
.shot .glow{
  position:absolute;inset:0;
  background:linear-gradient(to top,rgba(8,8,11,.55) 0%,transparent 45%);
  opacity:.75;transition:opacity .4s var(--ease);
}
.shot:hover,.shot:focus-visible{
  transform:translateY(-6px);
  border-color:rgba(255,154,60,.5);
  box-shadow:var(--shadow),0 0 0 1px rgba(255,154,60,.18);
  outline:none;
}
.shot:hover img,.shot:focus-visible img{transform:scale(1.07);filter:saturate(1.1) brightness(1.02)}
.shot:hover .glow{opacity:.35}

figcaption{padding:18px 4px 6px}
.tag{
  display:inline-block;font-size:10px;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;color:var(--amber);margin-bottom:8px;
}
figcaption h3{font-size:19px;margin-bottom:7px}
figcaption p{color:var(--text-3);font-size:13.5px;line-height:1.75}

.empty{color:var(--text-3);text-align:center;padding:60px 0}

/* ===================== ABOUT ===================== */
.about{padding:90px 6vw 110px;border-top:1px solid var(--line);margin-top:70px;background:var(--bg-2)}
.about-inner{max-width:760px;margin:0 auto;text-align:center}
.about-inner h2{font-size:clamp(26px,3.4vw,38px);letter-spacing:-.02em;margin-bottom:18px}
.about-inner > p{color:var(--text-2);font-size:15px}
.stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:2px;margin:46px 0 0;padding:0;
  background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden;
}
.stats > div{background:var(--bg-2);padding:24px 18px}
.stats dt{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--text-3);margin-bottom:8px}
.stats dd{margin:0;font-size:15px;font-weight:600;color:var(--text)}

/* ===================== FOOTER ===================== */
.site-footer{padding:56px 6vw 70px;text-align:center;border-top:1px solid var(--line)}
.f-title{font-size:15px;font-weight:700;letter-spacing:.06em}
.f-sub{color:var(--text-3);font-size:12px;letter-spacing:.1em;margin-top:8px}
.to-top{
  display:inline-block;margin-top:26px;font-size:12px;letter-spacing:.1em;color:var(--text-2);
  border-bottom:1px solid var(--line-2);padding-bottom:3px;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.to-top:hover{color:var(--amber);border-color:var(--amber)}

/* ===================== LIGHTBOX ===================== */
.lightbox{
  position:fixed;inset:0;z-index:100;
  display:grid;place-items:center;
  padding:5vh 6vw;
  background:rgba(4,4,6,.93);
  backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  opacity:0;transition:opacity .3s var(--ease);
}
.lightbox[hidden]{display:none}
.lightbox.is-open{opacity:1}
.lb-stage{margin:0;display:flex;flex-direction:column;align-items:center;gap:16px;max-width:100%;max-height:100%}
.lb-stage img{
  max-width:min(1100px,88vw);max-height:78vh;width:auto;height:auto;
  border-radius:10px;box-shadow:0 40px 90px rgba(0,0,0,.7);
  animation:pop .38s var(--ease) both;
}
@keyframes pop{from{opacity:0;transform:scale(.965)}to{opacity:1;transform:none}}
.lb-stage figcaption{display:flex;align-items:center;gap:16px;color:var(--text-2);font-size:14px;padding:0}
.lb-title{font-weight:700;color:var(--text)}
.lb-count{font-size:12px;letter-spacing:.16em;color:var(--text-3)}

.lb-close,.lb-nav{
  position:absolute;z-index:2;
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;
  color:var(--text);border:1px solid var(--line);
  background:rgba(255,255,255,.05);
  transition:all .22s var(--ease);
}
.lb-close:hover,.lb-nav:hover{background:var(--amber);color:#1a0d02;border-color:var(--amber)}
.lb-close{top:20px;right:22px;font-size:26px;line-height:1}
.lb-nav{top:50%;transform:translateY(-50%);font-size:34px;line-height:1;padding-bottom:5px}
.lb-nav.prev{left:18px}
.lb-nav.next{right:18px}

/* ===================== REVEAL ===================== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ===================== RESPONSIVE ===================== */
@media (max-width:900px){
  .card.wide{grid-column:span 1}
  .card.wide .shot{aspect-ratio:4/3}
  .grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
  .hero{padding:100px 7vw 120px}
  .lb-nav{width:44px;height:44px;font-size:28px}
  .lb-nav.prev{left:8px}
  .lb-nav.next{right:8px}
}
@media (max-width:560px){
  .grid{grid-template-columns:1fr}
  .topbar-links{gap:16px}
  .hero-meta{margin-top:26px}
  .lb-stage img{max-height:66vh}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}