:root {
  --bg-1: #f0f9ff;
  --bg-2: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  font-family: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 500px at 0% 0%, #dbeafe 0%, transparent 60%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 60%, #eef2ff 100%);
  display: grid;
  place-items: center;
}

.hub {
  width: min(680px, 92vw);
  text-align: center;
  padding: 36px 20px;
  border-radius: 28px;
  background: color-mix(in srgb, var(--card) 85%, transparent);
  border: 1px solid #dbeafe;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
}

.badge {
  margin: 0 0 18px;
  display: inline-block;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid #dbeafe;
  font-size: 13px;
  font-weight: 700;
  color: #334155;
  background: #ffffff;
}

.game-btn {
  width: min(440px, 100%);
  margin: 0 auto;
  padding: 24px 20px;
  border-radius: 24px;
  border: 1px solid #bfdbfe;
  text-decoration: none;
  background: linear-gradient(135deg, #ffffff 0%, #eff6ff 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}

.game-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(59, 130, 246, 0.18);
  border-color: #93c5fd;
}

.logo {
  font-size: clamp(32px, 8vw, 52px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.06em;
}

.logo .c1 { color: #ec4899; }
.logo .c2 { color: #f97316; }
.logo .c3 { color: #f59e0b; }
.logo .c4 { color: #84cc16; }
.logo .c5 { color: #14b8a6; }
.logo .c6 { color: #3b82f6; }
.logo .c7 { color: #6366f1; }
.logo .c8 { color: #a855f7; }

.cta {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 999px;
  background: #0f172a;
  color: #ffffff;
  font-weight: 700;
}

.hint {
  margin: 18px 0 0;
  font-size: 14px;
  color: var(--muted);
}