:root {
  --bg: #0b0d17;
  --bg2: #141832;
  --fg: #e8eaf6;
  --muted: #9aa0c3;
  --accent: #b388ff;
  --accent2: #80d8ff;
  --pink: #ff80ab;
  --card: rgba(255, 255, 255, 0.04);
  --border: rgba(179, 136, 255, 0.25);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--fg);
  background: radial-gradient(ellipse at top, var(--bg2), var(--bg) 60%);
  min-height: 100vh;
  line-height: 1.7;
  overflow-x: hidden;
}

#stars {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
}

.hero {
  text-align: center;
  padding: 4rem 1.5rem 2rem;
}

.logo {
  filter: drop-shadow(0 0 18px var(--accent));
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-12px) rotate(6deg); }
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(90deg, var(--accent2), var(--accent), var(--pink));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: shimmer 6s linear infinite;
}

@keyframes shimmer { to { background-position: 200% center; } }

.dot { color: var(--pink); -webkit-text-fill-color: var(--pink); }

.tagline { color: var(--muted); font-size: 1.15rem; margin-top: 0.5rem; }
.tagline strong { color: var(--accent2); font-weight: 600; }

nav {
  margin-top: 1.8rem;
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  flex-wrap: wrap;
}

nav a {
  color: var(--fg);
  text-decoration: none;
  padding: 0.45rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

nav a:hover, nav a.active {
  background: var(--accent);
  color: #1a1030;
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(179, 136, 255, 0.5);
}

main { max-width: 960px; margin: 0 auto; padding: 1rem 1.5rem 3rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
  margin: 2rem 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.6rem;
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(128, 216, 255, 0.15);
}

.card-icon { font-size: 2.2rem; margin-bottom: 0.6rem; }
.card h2 { font-size: 1.25rem; margin-bottom: 0.4rem; color: var(--accent2); }
.card p { color: var(--muted); font-size: 0.97rem; }

.counter-box {
  text-align: center;
  margin: 3rem auto 0;
  padding: 2rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.counter-box h2 { margin-bottom: 0.8rem; }

.mono { font-family: "SF Mono", ui-monospace, "Cascadia Code", monospace; color: var(--accent2); }

.btn {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 999px;
  padding: 0.35rem 1.1rem;
  color: #1a1030;
  background: linear-gradient(90deg, var(--pink), var(--accent));
  font-weight: 600;
  transition: transform 0.1s ease, filter 0.2s ease;
}

.btn:hover { filter: brightness(1.1); }
.btn:active { transform: scale(0.92); }

.hash-note {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
  font-style: italic;
}

footer {
  text-align: center;
  padding: 2rem 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer a { color: var(--accent); }

/* about.html */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.prose h2 { margin: 2rem 0 0.8rem; color: var(--accent2); }
.prose p { color: var(--fg); margin-bottom: 1rem; }
.prose ol { color: var(--muted); padding-left: 1.4rem; margin-bottom: 1rem; }
.prose li { margin-bottom: 0.5rem; }

pre {
  background: #05060e;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  margin-bottom: 1rem;
}

code { font-family: "SF Mono", ui-monospace, "Cascadia Code", monospace; color: var(--accent2); font-size: 0.9rem; }

@media (prefers-reduced-motion: reduce) {
  .logo, h1 { animation: none; }
}