/* Spin gallery：可拖曳旋轉的 3D 作品環 */
.sg{
  --sg-bg:#09090B; --sg-ink:#f4f1ea; --sg-mute:rgba(244,241,234,.55);
  position:relative;height:min(100svh,900px);min-height:560px;background:var(--sg-bg);
  overflow:hidden;isolation:isolate;touch-action:pan-y;user-select:none;-webkit-user-select:none;
  cursor:grab;outline:none;color:var(--sg-ink)
}
.sg.is-dragging{cursor:grabbing}
.sg.is-open{cursor:zoom-out}
.sg:focus-visible{box-shadow:inset 0 0 0 2px rgba(217,180,106,.6)}
.sg > *{position:absolute}

/* 光：聚光燈錐、塵埃、地面光暈 */
.sg-cone{left:50%;top:-4%;width:var(--cone-w,760px);height:96%;transform:translateX(-50%);
  background:linear-gradient(to bottom,rgba(255,244,226,.20),rgba(255,244,226,.07) 55%,rgba(255,244,226,0) 92%);
  clip-path:polygon(44% 0,56% 0,100% 100%,0 100%);filter:blur(22px);mix-blend-mode:screen;pointer-events:none;z-index:1}
.sg-cone::before{content:"";position:absolute;left:50%;top:-30px;width:220px;height:120px;transform:translateX(-50%);
  background:radial-gradient(closest-side,rgba(255,246,232,.55),transparent);filter:blur(10px)}
.sg-dust{inset:0;width:100%;height:100%;pointer-events:none;z-index:2;mix-blend-mode:screen}
.sg-floor{left:50%;top:var(--floor-y,70%);width:var(--floor-w,1100px);height:var(--floor-h,320px);transform:translate(-50%,-50%);
  background:radial-gradient(closest-side,rgba(255,240,220,.10),rgba(255,240,220,.03) 55%,transparent);pointer-events:none;z-index:0}

/* 環 */
.sg-scene{inset:0;z-index:3;transform-origin:50% 45%}
.sg-ring{position:absolute;left:50%;top:var(--ring-y,42%);width:0;height:0;transform-style:preserve-3d}
.sg-slot{position:absolute;transform-style:preserve-3d;backface-visibility:visible}
.sg-card,.sg-refl{position:absolute;left:0;width:100%;height:100%;border-radius:10px;overflow:hidden;will-change:transform}
.sg-card{top:0;background:#111;cursor:pointer}
.sg-card img,.sg-refl img{width:100%;height:100%;object-fit:cover;display:block;pointer-events:none;-webkit-user-drag:none}
.sg-card::after{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.16),inset 0 1px 0 rgba(255,255,255,.22)}
.sg-shade{position:absolute;inset:0;background:#000;pointer-events:none}
.sg-sheen{position:absolute;top:0;bottom:0;left:-60%;width:60%;pointer-events:none;
  background:linear-gradient(105deg,transparent 20%,rgba(255,255,255,.16) 50%,transparent 80%);mix-blend-mode:screen}
.sg-refl{top:calc(100% + 4px);transform-origin:50% 50%;pointer-events:none;
  -webkit-mask-image:linear-gradient(to top,rgba(0,0,0,.34),transparent 58%);
          mask-image:linear-gradient(to top,rgba(0,0,0,.34),transparent 58%)}
.sg-refl .sg-shade{opacity:.35}

/* 打開：模糊底圖＋放大框 */
.sg-blur{inset:-8%;z-index:4;background-size:cover;background-position:center;filter:blur(48px) saturate(1.15) brightness(.38);opacity:0;pointer-events:none}
.sg-frame{z-index:5;left:0;top:0;border-radius:10px;overflow:hidden;transform-origin:0 0;will-change:transform;
  box-shadow:0 40px 120px rgba(0,0,0,.6),inset 0 0 0 1px rgba(255,255,255,.18);cursor:default}
.sg-frame[hidden]{display:none}
.sg-frame img{width:100%;height:100%;object-fit:cover;display:block}
.sg-cap{position:absolute;left:0;right:0;bottom:0;padding:90px 28px 24px;display:flex;align-items:flex-end;gap:16px 24px;flex-wrap:wrap;
  background:linear-gradient(to top,rgba(5,5,7,.92) 0%,rgba(5,5,7,.6) 45%,transparent)}
.sg-cap{color:#f4f1ea}
.sg-cap > *{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .7s cubic-bezier(.2,.8,.2,1)}
.sg.is-open .sg-cap > *{opacity:1;transform:none}
.sg.is-open .sg-cap > :nth-child(2){transition-delay:.08s}
.sg.is-open .sg-cap > :nth-child(3){transition-delay:.16s}
.sg.is-open .sg-cap > :nth-child(4){transition-delay:.22s}
.sg-cap h3{flex:1 1 320px;font:600 clamp(20px,2.4vw,32px)/1.25 var(--serif,serif)}
.sg-cap .sg-year{font:400 13px var(--mono,monospace);color:var(--sg-mute)}
.sg-view{font:500 14px var(--sans,sans-serif);color:#09090B;background:#f4f1ea;border:0;border-radius:999px;padding:10px 18px;cursor:pointer;text-decoration:none}
.sg-view:hover{background:#fff}
.sg-ig{font:500 14px var(--sans,sans-serif);color:#f4f1ea;border:1px solid rgba(244,241,234,.4);border-radius:999px;padding:9px 16px;text-decoration:none}
.sg-ig:hover{border-color:var(--sg-ink)}
.sg-ig[hidden]{display:none}

/* 氛圍：暗角、底片顆粒 */
.sg-vignette{inset:0;z-index:6;pointer-events:none;background:radial-gradient(ellipse 75% 70% at 50% 45%,transparent 45%,rgba(0,0,0,.78) 100%)}
.sg-grain{inset:-120px;z-index:7;pointer-events:none;opacity:.07;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 1.4 -.2'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>")}

/* 文字 */
.sg-hud-l{left:clamp(16px,4vw,56px);bottom:clamp(20px,4vw,48px);z-index:8;pointer-events:none}
.sg-hud-l h2{font-family:"Bricolage Grotesque",sans-serif;font-weight:200;font-stretch:75%;font-variation-settings:"wdth" 75,"opsz" 96;
  font-size:clamp(44px,8.4vw,132px);line-height:.88;letter-spacing:-.02em;color:var(--sg-ink)}
.sg-hud-r{right:clamp(16px,4vw,56px);bottom:clamp(20px,4vw,48px);z-index:8;text-align:right;width:min(380px,46vw);pointer-events:none}
.sg-kind{font:600 11px var(--mono,monospace);letter-spacing:.14em;color:#d9b46a;text-transform:uppercase}
.sg-title{position:relative;height:1.35em;margin:6px 0 10px;font:500 clamp(15px,1.6vw,20px)/1.35 var(--sans,sans-serif);overflow:hidden}
.sg-count{font:400 13px var(--mono,monospace);color:var(--sg-mute);display:inline-flex;gap:.5ch;align-items:center;line-height:1.3}
.sg-roll{position:relative;display:inline-block;width:2ch;height:1.3em;overflow:hidden;color:var(--sg-ink)}
.sg-roll span,.sg-title span{position:absolute;right:0;top:0;white-space:nowrap;max-width:100%;overflow:hidden;text-overflow:ellipsis;transition:transform .55s cubic-bezier(.2,.8,.2,1),opacity .4s}
.sg-hud-l,.sg-hud-r{transition:opacity .45s ease,transform .6s cubic-bezier(.2,.8,.2,1)}
.sg.is-open .sg-hud-l,.sg.is-open .sg-hud-r{opacity:0;transform:translateY(12px)}
.sg-hint{left:50%;top:20px;transform:translateX(-50%);z-index:8;font:400 12px var(--mono,monospace);letter-spacing:.08em;color:var(--sg-mute);pointer-events:none;transition:opacity .6s}
.sg.touched .sg-hint{opacity:0}

/* 示範用的游標 */
.sg-ghost{left:0;top:0;z-index:9;width:26px;height:26px;opacity:0;pointer-events:none;will-change:transform,opacity;filter:drop-shadow(0 2px 6px rgba(0,0,0,.6))}
.sg-ghost i{position:absolute;left:-14px;top:-14px;width:28px;height:28px;border-radius:50%;border:1.5px solid rgba(255,255,255,.8);opacity:0;transform:scale(.4)}

@media (max-width:640px){
  .sg-hud-r{width:52vw}
  .sg-hint{top:12px}
}
@media (prefers-reduced-motion:reduce){
  .sg-cap > *,.sg-roll span,.sg-title span{transition:none}
}

/* 作品索引（分類） */
.idx{padding:64px 0 24px;border-bottom:1px solid var(--line)}
.idx h2{font-family:var(--serif);font-size:28px;margin-bottom:24px}
.idx-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:28px}
.idx h3{font:600 12px var(--mono);letter-spacing:.14em;color:var(--gold);text-transform:uppercase;margin-bottom:8px}
.idx ul{list-style:none}
.idx button{all:unset;display:flex;justify-content:space-between;gap:12px;width:100%;padding:9px 0;border-bottom:1px solid var(--line);cursor:pointer;font-size:15px;color:var(--ink)}
.idx button span{font:400 12px var(--mono);color:var(--dim);flex:none}
.idx button:hover{color:var(--gold)}
.idx button:focus-visible{outline:2px solid var(--gold);outline-offset:2px}