:root {
    color-scheme: light;
    --bg: #f3f5f9;
    --text: #111827;
    --card-bg: #ffffff;
    --card-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --outline: #cbd5f5;
    --muted: #eef1f6;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0b1120;
    --text: #e2e8f0;
    --card-bg: #111827;
    --card-shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --outline: #334155;
    --muted: #1f2937;
}

body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    text-align: center;
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--card-shadow);
    min-width: min(90vw, 520px);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

h1 {
    margin-bottom: 2rem;
    font-size: 1.6rem;
}

button {
    margin-top: 2rem;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    background-color: var(--primary);
    color: white;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

.theme-toggle {
    margin-top: 0;
    padding: 0.5rem 0.9rem;
    font-size: 0.9rem;
    border-radius: 999px;
    background-color: transparent;
    color: var(--text);
    border: 1px solid var(--outline);
}

.theme-toggle:hover {
    background-color: var(--muted);
}