:root {
  --ink: #f3eee4;
  --muted: #b9c4bc;
  --soon: #8a968e;
  --line: rgba(243, 238, 228, 0.18);
  --card: rgba(12, 28, 22, 0.55);
  --accent: #e2b03a;
  --bg0: #071510;
  --bg1: #123226;
  --font-brand: "Shippori Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-body: "IBM Plex Sans JP", "Hiragino Sans", "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  position: relative;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--bg0);
  overflow-x: hidden;
}
.atmosphere {
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(900px 520px at 12% -8%, rgba(46, 122, 88, 0.55), transparent 60%),
    radial-gradient(760px 480px at 100% 8%, rgba(168, 104, 28, 0.28), transparent 55%),
    linear-gradient(165deg, var(--bg1), var(--bg0) 55%);
  animation: drift 18s ease-in-out infinite alternate;
}
.atmosphere::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black 35%, transparent 80%);
  opacity: 0.35;
}
@keyframes drift {
  from { transform: scale(1) translate3d(0,0,0); }
  to { transform: scale(1.04) translate3d(-1.5%, 1%, 0); }
}
.stage {
  position: relative; z-index: 1;
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(3.5rem, 12vh, 7rem) 0 4rem;
}
.brand {
  margin: 0;
  font-family: var(--font-brand);
  font-size: clamp(3rem, 10vw, 5.2rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 0.95;
  animation: rise 0.8s ease both;
}
.headline {
  margin: 1.1rem 0 0;
  font-size: clamp(1.15rem, 2.8vw, 1.45rem);
  font-weight: 600;
  animation: rise 0.8s ease 0.08s both;
}
.lead {
  margin: 0.7rem 0 0;
  max-width: 28rem;
  color: var(--muted);
  line-height: 1.65;
  animation: rise 0.8s ease 0.16s both;
}
.apps {
  display: grid;
  gap: 0.85rem;
  margin-top: 2.4rem;
  animation: rise 0.9s ease 0.24s both;
}
.app {
  display: grid;
  gap: 0.28rem;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--card);
  color: inherit;
  text-decoration: none;
  backdrop-filter: blur(8px);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
a.app:hover, a.app:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(226, 176, 58, 0.55);
  background: rgba(18, 42, 33, 0.72);
  outline: none;
}
.app.soon { opacity: 0.72; }
.app-name { font-size: 1.2rem; font-weight: 700; }
.app-desc { color: var(--muted); line-height: 1.45; }
.app-meta {
  margin-top: 0.25rem;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}
.app.soon .app-meta { color: var(--soon); }
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 560px) {
  .stage { padding-top: 2.8rem; }
}