:root {
    --primary-color: oklch(65% 0.25 260);
    --background-color: oklch(98% 0.02 260);
    --surface-color: oklch(100% 0 0);
    --text-color: oklch(20% 0.02 260);
    --shadow-color: oklch(20% 0.02 260 / 40%);
}

body {
    font-family: system-ui, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 2rem;
    display: grid;
    place-content: center;
    min-height: 100vh;
    background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="4" height="4" viewBox="0 0 4 4"%3E%3Cpath fill="%239C92AC" fill-opacity="0.1" d="M1 3h1v1H1V3zm2-2h1v1H3V1z"%3E%3C/path%3E%3C/svg%3E');
}

.container {
    max-width: 600px;
    width: 100%;
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 10px 30px -15px var(--shadow-color);
    text-align: center;
}

h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

#generate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px -5px oklch(65% 0.25 260 / 50%);
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px -5px oklch(65% 0.25 260 / 70%);
}

.results {
    margin-top: 2rem;
}

h2 {
    font-size: 1.5rem;
    color: var(--text-color);
    border-bottom: 2px solid oklch(90% 0.02 260);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.number-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 1.5rem;
    background: oklch(99% 0.01 260);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 5px 15px -10px var(--shadow-color);
}

.number {
    width: 50px;
    height: 50px;
    display: grid;
    place-content: center;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}