/* 案1「黒曜石」— 割れた黒いガラスと、カーソルで走る光 */
:root{--bg:#050507;--bg2:#0d0e13;--bg3:#15171f;--fg:#ecebe6;--mute:#8b8d98;--hot:#9af0ff;--f-d:"Dela Gothic One","Zen Kaku Gothic New",sans-serif;--f-m:"Shippori Mincho B1",serif;--f-b:"Zen Kaku Gothic New",sans-serif;--sh:7vw}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--fg);font-family:var(--f-b);line-height:1.9;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3,p{margin:0}
::selection{background:var(--hot);color:#000}
/* カーソル追従の虹色の光沢 */
.glint{position:fixed;inset:0;pointer-events:none;z-index:30;mix-blend-mode:screen;opacity:.55;
  background:radial-gradient(420px circle at var(--mx,70%) var(--my,20%),rgba(154,240,255,.22),rgba(255,120,200,.12) 40%,transparent 70%)}
.hd{position:fixed;top:0;left:0;right:0;z-index:40;display:flex;justify-content:space-between;align-items:center;padding:18px clamp(16px,4vw,48px);mix-blend-mode:difference;color:#fff;font-weight:700}
.hd nav{display:flex;gap:clamp(12px,2.4vw,32px)}
.hd nav a{position:relative;padding:2px 0}
.hd nav a::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .35s}
.hd nav a:hover::after,.hd nav a[aria-current]::after{transform:scaleX(1)}
canvas.glass{position:absolute;inset:0;width:100%;height:100%;display:block}
.hero{position:relative;min-height:100svh;overflow:hidden;display:grid;align-items:end}
.hero-in{position:relative;z-index:2;padding:0 clamp(16px,4vw,48px) clamp(32px,6vw,72px);display:flex;justify-content:space-between;align-items:flex-end;gap:24px;flex-wrap:wrap;pointer-events:none}
.v{writing-mode:vertical-rl;white-space:nowrap;font-family:var(--f-d);font-size:min(24vw,25vh);line-height:.95;margin-top:80px;letter-spacing:.02em;background:linear-gradient(180deg,#fff 10%,#9af0ff 50%,#ff9ad8 90%);-webkit-background-clip:text;background-clip:text;color:transparent;filter:drop-shadow(0 0 40px rgba(154,240,255,.25));margin-left:-.06em}
.hero-txt{max-width:26em;text-align:right;margin-left:auto}
.hero-txt .en{font-family:var(--f-d);font-size:clamp(1.4rem,4vw,3.2rem);line-height:1.1;letter-spacing:.04em}
.hero-txt p{margin-top:14px;font-family:var(--f-m);font-weight:500;font-size:clamp(1rem,1.7vw,1.3rem)}
.scroll{position:absolute;z-index:2;left:50%;bottom:16px;font-size:.7rem;letter-spacing:.4em;color:var(--mute);writing-mode:vertical-rl;animation:fall 2s infinite}
@keyframes fall{50%{transform:translateY(8px);opacity:.4}}
/* 割れた断面の帯 */
.shard{position:relative;padding:calc(var(--sh) + clamp(40px,8vw,120px)) clamp(16px,4vw,48px);margin-top:calc(var(--sh) * -1);clip-path:polygon(0 var(--sh),100% 0,100% calc(100% - var(--sh)),0 100%);background:var(--bg2)}
.shard.alt{background:var(--bg3);clip-path:polygon(0 0,100% var(--sh),100% 100%,0 calc(100% - var(--sh)))}
.shard.light{background:#e9e6dd;color:#0b0b0d}
.in{max-width:1180px;margin:auto}
.k{font-family:var(--f-d);color:var(--hot);font-size:.9rem;letter-spacing:.3em;margin-bottom:16px}
.light .k{color:#c2304f}
h2.t{font-family:var(--f-d);font-size:clamp(2.2rem,7vw,6rem);line-height:1.1;font-weight:400;margin-bottom:.4em}
.lead{font-family:var(--f-m);font-weight:800;font-size:clamp(1.3rem,3.2vw,2.4rem);line-height:1.7;max-width:20em}
.dim{opacity:.4}
/* 石鏃(矢じり)型のカード */
.pts{display:grid;gap:clamp(20px,4vw,56px);grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));margin-top:48px}
.pt{display:block;transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.pt:hover{transform:translateY(-10px) rotate(-1.5deg)}
.pt .img{aspect-ratio:3/4;clip-path:polygon(50% 0,100% 34%,88% 100%,12% 100%,0 34%);background:
  repeating-linear-gradient(115deg,transparent 0 22px,rgba(255,255,255,.06) 22px 23px),
  linear-gradient(160deg,#2a2c38,#06060a 60%);position:relative;overflow:hidden;display:grid;place-items:center;color:var(--mute);font-size:.75rem}
.pt .img::after{content:"";position:absolute;inset:0;background:linear-gradient(105deg,transparent 35%,rgba(154,240,255,.5) 50%,transparent 65%);transform:translateX(-120%);transition:transform .9s}
.pt:hover .img::after{transform:translateX(120%)}
.pt h3{font-family:var(--f-m);font-weight:800;font-size:1.3rem;margin-top:16px}
.pt p{color:var(--mute);font-size:.92rem}
.light .pt p{color:#555}
/* 一覧行 */
.list{border-top:1px solid rgba(255,255,255,.25);margin-top:32px}
.li{display:grid;grid-template-columns:9em 1fr auto;gap:16px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.14);transition:padding .4s,background .4s}
.li:hover{padding-left:16px;background:linear-gradient(90deg,rgba(154,240,255,.12),transparent)}
.li time,.li .c{font-family:var(--f-d);font-size:.85rem;color:var(--hot)}
.li h3{font-weight:700;font-size:1.05rem}
@media(max-width:640px){.li{grid-template-columns:1fr;gap:2px}}
.dl{display:grid;grid-template-columns:9em 1fr;border-top:1px solid currentColor}
.dl dt,.dl dd{margin:0;padding:18px 0;border-bottom:1px solid rgba(128,128,128,.4)}
.dl dt{font-family:var(--f-d);font-size:.9rem;opacity:.7}
.btn{display:inline-block;margin-top:32px;padding:16px 40px;font-family:var(--f-d);color:#000;background:linear-gradient(120deg,#9af0ff,#ff9ad8);clip-path:polygon(0 0,calc(100% - 18px) 0,100% 50%,calc(100% - 18px) 100%,0 100%,18px 50%);transition:filter .3s,transform .3s}
.btn:hover{filter:brightness(1.2);transform:translateX(6px)}
.page{padding-top:calc(130px + var(--sh))}
.ph1{position:relative;padding:130px clamp(16px,4vw,48px) calc(var(--sh) + 24px);overflow:hidden}
.ph1 h1{position:relative;z-index:2;font-family:var(--f-d);font-weight:400;font-size:clamp(3.4rem,15vw,13rem);line-height:1;pointer-events:none}
.ph1 p{position:relative;z-index:2;font-family:var(--f-m);font-weight:800;font-size:1.2rem;pointer-events:none}
.ft{position:relative;overflow:hidden;margin-top:calc(var(--sh) * -1);padding:calc(var(--sh) + 60px) clamp(16px,4vw,48px) 36px;clip-path:polygon(0 var(--sh),100% 0,100% 100%,0 100%)}
.ft-in{position:relative;z-index:2;max-width:1180px;margin:auto;pointer-events:none}
.ft-in a{pointer-events:auto}
.ft-big{font-family:var(--f-d);font-size:clamp(3.4rem,14vw,12rem);line-height:1.02;margin-bottom:48px}
.ft-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px;font-size:.92rem;color:#cfd0d8}
.todo{background:#fff3b0;color:#000;padding:0 .3em;border-radius:3px;font-weight:700}
.rv{opacity:0;transform:translateY(40px) skewY(2deg);transition:opacity .9s,transform .9s cubic-bezier(.2,.8,.2,1)}
.rv.on{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.rv{opacity:1;transform:none}}