:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #1f2430;
  --accent: #1d4ed8;
  --border: #d8dce7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  background: linear-gradient(145deg, #f8fafc, #eef2ff);
  color: var(--text);
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.container {
  width: 100%;
  max-width: 560px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 22px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(29, 78, 216, 0.08);
}

h1 {
  margin: 0;
  font-size: 1.9rem;
}

.description {
  margin: 10px 0 22px;
  color: #4a5568;
}

.numbers-wrap {
  min-height: 84px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
}

.numbers {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.ball {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}

.range1 {
  background: #f59e0b;
}

.range2 {
  background: #2563eb;
}

.range3 {
  background: #ef4444;
}

.range4 {
  background: #16a34a;
}

.range5 {
  background: #64748b;
}

button {
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  padding: 12px 20px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.05);
}