:root {
    --primary-color: #ff6b6b;
    --primary-hover-color: #ff4747;
    --secondary-color: #f0f0f0;
    --background-color: #f8f9fa;
    --background-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --surface-color: #ffffff;
    --text-color: #333;
    --muted-text-color: #5f6470;
    --border-color: #eee;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --button-shadow-color: rgba(255, 107, 107, 0.5);
    --button-shadow-hover-color: rgba(255, 107, 107, 0.7);
    --font-family: 'Montserrat', sans-serif;
}

body[data-theme="dark"] {
    --primary-color: #ff8f8f;
    --primary-hover-color: #ffb0b0;
    --secondary-color: #242936;
    --background-color: #111827;
    --background-gradient: linear-gradient(135deg, #111827 0%, #263244 100%);
    --surface-color: #1f2937;
    --text-color: #f8fafc;
    --muted-text-color: #cbd5e1;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.35);
    --button-shadow-color: rgba(255, 143, 143, 0.35);
    --button-shadow-hover-color: rgba(255, 143, 143, 0.5);
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    background: var(--background-gradient);
    transition: background 0.3s ease, color 0.3s ease;
}

h1 {
    color: var(--primary-color);
    font-size: 3rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 0 16px;
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: var(--surface-color);
    color: var(--text-color);
    box-shadow: 0 8px 18px var(--shadow-color);
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 700;
    transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
}

.theme-toggle__icon {
    font-size: 1rem;
    line-height: 1;
}

lotto-generator {
    width: 100%;
    max-width: 500px;
    background: var(--surface-color);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 20px var(--shadow-color), 0 6px 6px var(--shadow-color);
    border: 1px solid var(--border-color);
    display: block; /* Ensures the component is treated as a block-level element */
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

@media (max-width: 560px) {
    body {
        padding: 72px 16px 20px;
    }

    h1 {
        font-size: 2.25rem;
    }

    .theme-toggle {
        top: 16px;
        right: 16px;
    }
}