:root{
  --bg:#070A12;
  --panel: rgba(255,255,255,.05);
  --line: rgba(255,255,255,.10);
  --text:#E7EAF0;
  --muted:#A2AAB8;

  --accent:#7C3AED; /* 1色に絞る（紫） */
  --shadow: 0 18px 60px rgba(0,0,0,.55);
  --radius: 22px;

  --max: 1100px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  background:
    radial-gradient(900px 520px at 15% 0%, rgba(124,58,237,.22), transparent 60%),
    radial-gradient(900px 520px at 85% 10%, rgba(124,58,237,.10), transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a{color:inherit;text-decoration:none}
a:hover{opacity:.92}

.container{max-width:var(--max); margin:0 auto; padding:0 22px}

/* ===== Nav ===== */
.nav{
  position:sticky; top:0; z-index:20;
  backdrop-filter: blur(10px);
  background: rgba(7,10,18,.68);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:64px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:720; letter-spacing:.2px;
}
.brand-mark{
  width:26px; height:26px; border-radius:10px;
  background: linear-gradient(135deg, rgba(124,58,237,.95), rgba(124,58,237,.45));
  box-shadow: 0 14px 28px rgba(124,58,237,.20);
}
.nav-links{display:flex; gap:10px; align-items:center}
.nav-links a{
  padding:8px 10px;
  color:var(--muted);
  border-radius:12px;
}
.nav-links a[aria-current="page"]{
  color:var(--text);
  background: rgba(255,255,255,.06);
}
.nav-links a:hover{
  color:var(--text);
  background: rgba(255,255,255,.06);
}

/* ===== Typography ===== */
.kicker{
  color: rgba(231,234,240,.78);
  font-size:12px;
  letter-spacing:.22em;
  text-transform:uppercase;
}
.h1{
  font-size:54px;
  line-height:1.08;
  margin:14px 0 12px;
  letter-spacing:-.02em;
}
@media (max-width: 720px){.h1{font-size:40px}}
.lead{
  color:var(--muted);
  font-size:16px;
  max-width: 62ch;
  margin: 0 auto;
}

/* ===== Sections ===== */
.section{padding: 92px 0}
.section-tight{padding: 64px 0}
.hr{height:1px; background: var(--line); margin:22px 0}

/* ===== Buttons ===== */
.cta-row{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
  align-items:center;
  justify-content:center;
  margin-top: 22px;
}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 14px;
  border-radius:16px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.04);
  color:var(--text);
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{transform: translateY(-1px); background: rgba(255,255,255,.07)}
.btn-primary{
  border-color: rgba(124,58,237,.48);
  background: linear-gradient(135deg, rgba(124,58,237,.98), rgba(124,58,237,.55));
  box-shadow: 0 18px 60px rgba(124,58,237,.22);
}
.btn-primary:hover{background: linear-gradient(135deg, rgba(124,58,237,1), rgba(124,58,237,.62))}
.badge{
  display:inline-flex; gap:8px; align-items:center;
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:999px;
  color: var(--muted);
  background: rgba(255,255,255,.03);
  font-size:13px;
}

/* ===== Cards / Layout ===== */
.card{
  border:1px solid var(--line);
  background: rgba(255,255,255,.035);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card-inner{padding:20px}
.card-title{font-weight:720; font-size:16px}
.card-desc{color:var(--muted); font-size:14px; margin-top:8px}

.grid-2{
  display:grid; gap:16px;
  grid-template-columns: repeat(2, 1fr);
}
@media (max-width: 900px){.grid-2{grid-template-columns:1fr}}

.grid-3{
  display:grid; gap:16px;
  grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 900px){.grid-3{grid-template-columns:1fr}}

.app-card{
  display:grid; gap:16px;
  grid-template-columns: 120px 1fr;
  align-items:center;
}
@media (max-width: 520px){.app-card{grid-template-columns: 90px 1fr}}

.app-thumb{
  width:120px; height:120px;
  border-radius: 22px;
  background: rgba(255,255,255,.04);
  border:1px solid var(--line);
  ov