:root {
  --bg: #0b0c10;
  --panel: rgba(20, 22, 30, 0.65);
  --border: rgba(255, 255, 255, 0.08);
  --ink: #f0f3f8;
  --muted: #a0a8b5;
  --accent: #ff7a00;
  --accent-2: #ffd166;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans JP", sans-serif;
  background: radial-gradient(circle at 70% 20%, rgba(255,122,0,0.15), transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(255,209,102,0.12), transparent 60%),
              var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}

/* Hero */
.hero {
  text-align: center;
  margin-bottom: 40px;
}
.hero__title {
  font-size: clamp(32px, 7vw, 52px);
  margin: 0;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  color: transparent;
}
.hero__sub {
  margin: 4px 0 10px;
  font-size: clamp(20px, 4vw, 28px);
  color: var(--muted);
}
.hero__lead {
  font-size: 16px;
  margin: 0;
}

/* Notice */

.notice {
  background: var(--panel);
  text-align: center;
  position: center;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 12px 28px rgba(0,0,0,0.35);
}
.notice__title {
  margin: 0 0 12px;
  font-size: 20px;
  font-weight: 700;
}
.notice p {
  margin: 0 0 12px;
}
.notice__url {
  display: inline-block;
  font-family: ui-monospace, monospace;
  padding: 6px 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 12px;
  user-select: all; /* コピーしやすく */
}
.notice ul {
  margin: 0;
  padding-left: 20px;
}
.notice li {
  margin: 6px 0;
  color: var(--muted);
}

/* Footer */
.footer {
  text-align: center;
  margin-top: 40px;
  color: var(--muted);
  font-size: 13px;
}