/* assist-tools ＝ 配信オーバーレイ素材ストア。ダーク×ネオン（和風サイバーパンク）。単一ダークテーマにコミット。 */
:root{
  --bg:#0a0b12; --bg2:#0c0e18; --surface:#12141f; --surface-2:#171a28; --border:#262a3d;
  --ink:#eef1fb; --muted:#9aa3bd; --faint:#666e8c;
  --cyan:#22d3ee; --cyan-dim:#0e7f92; --pink:#ff3b6b; --pink-dim:#a01f42;
  --accent:#22d3ee; --accent-ink:#04121a;
  --good:#34d399; --soon:#f5b74a;
  --glow-cyan:0 0 24px rgba(34,211,238,.35);
  --glow-pink:0 0 24px rgba(255,59,107,.32);
  --shadow:0 2px 4px rgba(0,0,0,.4), 0 14px 40px rgba(0,0,0,.5);
  --mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --jp:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Yu Gothic",Meiryo,system-ui,sans-serif;
  --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);font-family:var(--jp);line-height:1.7;-webkit-font-smoothing:antialiased;font-feature-settings:"palt" 1;
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(34,211,238,.10), transparent 60%),
    radial-gradient(800px 460px at 92% 4%, rgba(255,59,107,.10), transparent 60%),
    var(--bg);
  background-attachment:fixed;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
a{color:inherit;text-decoration:none}
.eyebrow{font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan);font-weight:800}
.mono{font-family:var(--mono)}
.num{font-variant-numeric:tabular-nums}

/* header */
header.top{position:sticky;top:0;z-index:20;background:rgba(10,11,18,.72);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:26px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.06em;font-size:1.05rem}
.brand .logo{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--cyan),var(--pink));
  display:grid;place-items:center;color:#04121a;font-family:var(--mono);font-weight:800;font-size:.9rem;box-shadow:var(--glow-cyan)}
.nav .links{display:flex;gap:22px;margin-left:8px;font-size:.9rem;color:var(--muted)}
.nav .links a:hover{color:var(--cyan)}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:14px;font-size:.9rem}
.nav .right .login{color:var(--muted)}
.nav .right .login:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:7px;border-radius:10px;font-weight:800;font-size:.9rem;
  padding:9px 17px;cursor:pointer;border:1px solid transparent;transition:transform .12s ease,box-shadow .2s ease,background .15s ease}
.btn-primary{background:linear-gradient(135deg,var(--cyan),#38bdf8);color:var(--accent-ink);box-shadow:var(--glow-cyan)}
.btn-primary:hover{box-shadow:0 0 30px rgba(34,211,238,.55)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--border)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-pink{background:linear-gradient(135deg,var(--pink),#fb7185);color:#fff;box-shadow:var(--glow-pink)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible,a:focus-visible{outline:2px solid var(--cyan);outline-offset:2px}
@media(max-width:760px){.nav .links{display:none}}

/* hero */
.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding:64px 0 40px}
.hero .eyebrow{margin-bottom:16px}
.hero h1{font-size:clamp(2.1rem,5.4vw,3.4rem);line-height:1.06;letter-spacing:-.02em;font-weight:900;margin:0 0 18px;text-wrap:balance}
.hero h1 .g{background:linear-gradient(120deg,var(--cyan),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:1.1rem;color:var(--muted);margin:0 0 26px;max-width:48ch}
.hero .cta{display:flex;gap:12px;flex-wrap:wrap}
.trustline{display:flex;gap:16px;flex-wrap:wrap;margin-top:26px;color:var(--faint);font-size:.85rem}
.trustline span{display:flex;align-items:center;gap:7px}
.trustline .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:var(--glow-cyan)}
@media(max-width:860px){.hero{grid-template-columns:1fr;gap:28px}}

/* hero の配信フレーム風ビジュアル */
.frame{position:relative;aspect-ratio:16/10;border-radius:14px;background:linear-gradient(160deg,#0c1420,#0a0d16);
  border:2px solid var(--cyan);box-shadow:var(--glow-cyan), inset 0 0 60px rgba(34,211,238,.06);overflow:hidden}
.frame::before{content:"";position:absolute;inset:10px;border:1px solid rgba(255,59,107,.5);border-radius:10px;pointer-events:none}
.frame .live{position:absolute;top:16px;right:16px;display:flex;align-items:center;gap:6px;font-family:var(--mono);
  font-size:.7rem;font-weight:800;color:#fff;background:rgba(255,59,107,.18);border:1px solid var(--pink);
  padding:4px 9px;border-radius:6px;letter-spacing:.1em}
.frame .live i{width:7px;height:7px;border-radius:50%;background:var(--pink);box-shadow:var(--glow-pink)}
.frame .center{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.frame .center .s1{font-size:clamp(1.6rem,4.4vw,2.4rem);font-weight:900;letter-spacing:.04em;color:var(--cyan);text-shadow:var(--glow-cyan);line-height:1}
.frame .center .s2{font-size:clamp(1.6rem,4.4vw,2.4rem);font-weight:900;letter-spacing:.04em;color:var(--pink);text-shadow:var(--glow-pink);line-height:1;margin-top:4px}
.frame .bar{position:absolute;left:14px;right:14px;bottom:14px;height:34px;border:1px solid var(--cyan);border-radius:8px;
  display:flex;align-items:center;gap:10px;padding:0 12px;background:rgba(34,211,238,.05)}
.frame .bar span{font-family:var(--mono);color:var(--muted);font-size:.72rem}
.frame .cam{position:absolute;right:14px;top:52px;bottom:58px;width:26%;border:1px solid var(--pink);border-radius:8px;background:rgba(255,59,107,.05)}

/* sections */
section{padding:46px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.sec-head h2{font-size:1.55rem;font-weight:900;letter-spacing:-.01em;margin:0}
.sec-head p{color:var(--muted);margin:0;font-size:.92rem}

/* products */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(272px,1fr));gap:20px}
.card{background:var(--surface);border:1px solid var(--border);border-radius:15px;overflow:hidden;
  display:flex;flex-direction:column;transition:transform .15s ease,border-color .15s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-4px);border-color:var(--cyan);box-shadow:var(--glow-cyan)}
.thumb{position:relative;aspect-ratio:16/9;background-size:cover;background-position:center;display:block;border-bottom:1px solid var(--border)}
.thumb .ph{position:absolute;inset:0;display:grid;place-items:center;padding:14px;text-align:center;
  font-weight:900;letter-spacing:.02em;color:rgba(255,255,255,.9);text-shadow:0 2px 10px rgba(0,0,0,.5)}
.thumb .ph::after{content:"";position:absolute;inset:12px;border:1px solid rgba(255,255,255,.25);border-radius:8px}
.thumb .chip{position:absolute;top:10px;left:10px}
.chip{font-size:.66rem;font-weight:900;padding:3px 9px;border-radius:999px;letter-spacing:.04em}
.chip.sale{background:rgba(52,211,153,.16);color:var(--good);border:1px solid rgba(52,211,153,.5)}
.chip.soon{background:rgba(245,183,74,.16);color:var(--soon);border:1px solid rgba(245,183,74,.5)}
.chip.hot{background:rgba(255,59,107,.16);color:var(--pink);border:1px solid rgba(255,59,107,.6)}
.cbody{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.cbody .ctag{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:9px}
.tag{font-family:var(--mono);font-size:.66rem;letter-spacing:.03em;padding:2px 7px;border-radius:5px;background:var(--surface-2);color:var(--muted);border:1px solid var(--border)}
.card h3{font-size:1.08rem;font-weight:800;margin:0 0 7px;letter-spacing:-.01em}
.card .desc{color:var(--muted);font-size:.88rem;margin:0 0 14px}
.card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px}
.price .k{font-size:.68rem;color:var(--faint);display:block;letter-spacing:.04em}
.price .v{font-size:1.34rem;font-weight:900;letter-spacing:-.01em}

/* custom band */
.custom-band{position:relative;background:linear-gradient(135deg,rgba(34,211,238,.10),rgba(255,59,107,.10)),var(--surface);
  border:1px solid var(--border);border-radius:18px;padding:40px;box-shadow:var(--shadow);
  display:grid;grid-template-columns:1.2fr .8fr;gap:30px;align-items:center;overflow:hidden}
.custom-band::before{content:"";position:absolute;inset:0;border-radius:18px;padding:1px;
  background:linear-gradient(135deg,var(--cyan),var(--pink));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;opacity:.5}
.custom-band .eyebrow{margin-bottom:14px}
.custom-band h2{font-size:1.7rem;font-weight:900;letter-spacing:-.01em;margin:0 0 12px}
.custom-band p{color:var(--muted);margin:0 0 20px;font-size:.98rem;max-width:46ch}
.custom-band ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:10px}
.custom-band li{position:relative;padding-left:22px;font-size:.92rem;color:var(--ink)}
.custom-band li::before{content:"";position:absolute;left:2px;top:.5em;width:8px;height:8px;border-radius:2px;background:var(--cyan);transform:rotate(45deg);box-shadow:var(--glow-cyan)}
@media(max-width:760px){.custom-band{grid-template-columns:1fr;padding:30px 24px}}

/* why */
.why .grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.why .item{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:20px}
.why .item h4{margin:0 0 8px;font-size:1.05rem;font-weight:800;display:flex;align-items:center;gap:9px}
.why .item .ic{width:30px;height:30px;border-radius:8px;background:var(--surface-2);border:1px solid var(--cyan);
  display:grid;place-items:center;color:var(--cyan);font-family:var(--mono);font-weight:800;font-size:.9rem}
.why .item p{margin:0;color:var(--muted);font-size:.9rem}

/* product detail */
.crumb{padding:20px 0 0;color:var(--faint);font-size:.85rem}
.crumb a:hover{color:var(--cyan)}
.detail{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;padding:22px 0 10px}
.detail .media{aspect-ratio:16/9;border-radius:14px;border:1px solid var(--border);overflow:hidden;position:relative;background-size:cover;background-position:center}
.detail .media .ph{position:absolute;inset:0;display:grid;place-items:center;font-weight:900;color:rgba(255,255,255,.9)}
.detail h1{font-size:1.9rem;font-weight:900;letter-spacing:-.02em;margin:12px 0 10px;text-wrap:balance}
.detail .lead{color:var(--muted);margin:0 0 18px}
.buybox{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px;box-shadow:var(--shadow);margin:14px 0}
.buybox .price .v{font-size:1.8rem}
.spec{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:6px}
.spec th,.spec td{text-align:left;padding:9px 4px;border-bottom:1px solid var(--border);vertical-align:top}
.spec th{color:var(--muted);font-weight:700;width:34%;white-space:nowrap}
.prose{font-size:.98rem;color:var(--ink);max-width:64ch}
.prose li{margin-bottom:6px}
@media(max-width:820px){.detail{grid-template-columns:1fr}}

/* forms */
.formcard{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:22px;box-shadow:var(--shadow);max-width:620px}
.field{margin-bottom:14px;display:flex;flex-direction:column;gap:6px}
.field label{font-size:.85rem;font-weight:700;color:var(--muted)}
.field input,.field textarea,.field select{font-family:inherit;font-size:.95rem;padding:10px 12px;border:1px solid var(--border);border-radius:9px;background:var(--bg2);color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:2px solid var(--cyan);outline-offset:1px;border-color:var(--cyan)}
.msg{padding:8px 10px;border-radius:8px;font-size:.9rem;margin-bottom:10px}

/* footer */
footer.site{padding:34px 0;border-top:1px solid var(--border);color:var(--faint);font-size:.85rem;margin-top:30px}
footer .row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;align-items:center}
footer .flinks{display:flex;gap:18px}
footer .flinks a:hover{color:var(--cyan)}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto}}