:root {
    --primary-color: #3498db;
    --background-color: #f0f2f5;
    --text-color: #333;
    --container-bg: #ffffff;
    --shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    --btn-hover: #2980b9;
}

[data-theme="dark"] {
    --primary-color: #5dade2;
    --background-color: #1a1a1a;
    --text-color: #f0f2f5;
    --container-bg: #2d2d2d;
    --shadow: 0 10px 20px rgba(0,0,0,0.5), 0 6px 6px rgba(0,0,0,0.6);
    --btn-hover: #3498db;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    padding: 40px 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

#theme-toggle {
    background: var(--container-bg);
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.3s ease;
}

#theme-toggle:hover {
    background-color: var(--primary-color);
    color: white;
}

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

h1 {
    margin-bottom: 30px;
    font-size: 2.2em;
    color: var(--primary-color);
}

.numbers-display {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
    gap: 10px;
}

.number-ball {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    font-size: 1.5em;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.number-ball:hover {
    transform: scale(1.1);
}

#generate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 25px;
    font-size: 1.1em;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11), 0 1px 3px rgba(0, 0, 0, 0.08);
    margin-bottom: 40px;
}

#generate-btn:hover {
    background-color: var(--btn-hover);
    box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
}

.partnership-form {
    border-top: 1px solid #ddd;
    padding-top: 30px;
    margin-top: 20px;
    text-align: left;
}

[data-theme="dark"] .partnership-form {
    border-top-color: #444;
}

.partnership-form h2 {
    font-size: 1.5em;
    margin-bottom: 20px;
    text-align: center;
    color: var(--primary-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    font-size: 0.9em;
}

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

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
    border-color: #555;
}

.form-group textarea {
    height: 100px;
    resize: vertical;
}

#submit-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px;
    font-size: 1em;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

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

#disqus_thread {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 1px solid #ddd;
}

[data-theme="dark"] #disqus_thread {
    border-top-color: #444;
}