:root {
    --primary-color: #f39c12;
    --secondary-color: #ffffff;
    --background-color: #f8f9fa;
    --text-color: #2c3e50;
    --container-bg: #ffffff;
    --container-shadow: rgba(0,0,0,0.1);
}

[data-theme="dark"] {
    --primary-color: #f39c12;
    --secondary-color: #2c3e50;
    --background-color: #1a1a1a;
    --text-color: #ecf0f1;
    --container-bg: #2c3e50;
    --container-shadow: rgba(0,0,0,0.3);
}

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

.container {
    position: relative;
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px var(--container-shadow);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

#theme-toggle {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    transition: transform 0.3s ease;
}

#theme-toggle:hover {
    transform: scale(1.1);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 30px;
}

.numbers-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.number {
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: bold;
    color: white;
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
}

#generate-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.2rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

#generate-button:hover {
    background-color: #e67e22;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

#generate-button:active {
    transform: translateY(1px);
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
}