:root {
    --bg-color: #f0f2f5;
    --container-bg: white;
    --text-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --button-bg: #4CAF50;
    --button-hover: #45a049;
    --input-bg: #fff;
    --input-border: #ccc;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg: #2d2d2d;
    --text-color: #f0f2f5;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --button-bg: #388E3C;
    --button-hover: #2E7D32;
    --input-bg: #3d3d3d;
    --input-border: #555;
}

body {
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
    padding: 20px 0;
}

.container {
    text-align: center;
    background-color: var(--container-bg);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px var(--shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
    width: 90%;
    max-width: 500px;
}

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

.controls {
    margin-bottom: 20px;
    display: flex;
    justify-content: flex-end;
}

#theme-toggle {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
}

#generate {
    background-color: var(--button-bg);
    color: white;
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#generate:hover {
    background-color: var(--button-hover);
}

#result {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.contact-section {
    margin-top: 40px;
    text-align: left;
}

.contact-section hr {
    border: 0;
    border-top: 1px solid var(--input-border);
    margin-bottom: 30px;
}

.contact-section h3 {
    margin-bottom: 20px;
    color: var(--text-color);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border);
    border-radius: 5px;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
}

#submit-btn {
    width: 100%;
    padding: 10px;
    background-color: var(--button-bg);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

#submit-btn:hover {
    background-color: var(--button-hover);
}

#form-status {
    margin-top: 10px;
    font-size: 14px;
    text-align: center;
}