:root {
    --bg-color: #f0f2f5;
    --container-bg-color: #fff;
    --text-color: #333;
    --button-bg-color: #007bff;
    --button-text-color: #fff;
    --lotto-number-bg-color: #4CAF50;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --container-bg-color: #2c2c2c;
    --text-color: #f0f2f5;
    --button-bg-color: #0056b3;
    --lotto-number-bg-color: #388e3c;
}

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

.container {
    text-align: center;
    background-color: var(--container-bg-color);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s;
}

h1 {
    margin-bottom: 30px;
    color: var(--text-color);
    font-size: 2.5em;
}

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

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60px;
    height: 60px;
    margin: 0 10px;
    border-radius: 50%;
    background-color: var(--lotto-number-bg-color);
    color: #fff;
    font-size: 1.8em;
    font-weight: bold;
    animation: bounce 0.5s ease;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

.generate-btn {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    font-size: 1.2em;
    cursor: pointer;
    transition: background-color 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.generate-btn:hover {
    background-color: #0056b3;
}

body.dark-mode .generate-btn:hover {
    background-color: #003d80;
}

.theme-toggle-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 15px;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    cursor: pointer;
    transition: background-color 0.3s;
}

.partnership-form {
    margin-top: 30px;
    width: 80%;
    max-width: 500px;
}

.partnership-form h2 {
    color: var(--text-color);
    margin-bottom: 20px;
    font-size: 2em;
}

.partnership-form .form-group {
    margin-bottom: 15px;
    text-align: left;
}

.partnership-form label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-color);
    font-weight: bold;
}

.partnership-form input[type="text"],
.partnership-form input[type="email"],
.partnership-form textarea {
    width: calc(100% - 20px);
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    background-color: var(--container-bg-color);
    color: var(--text-color);
    transition: border-color 0.3s, background-color 0.3s;
}

.partnership-form input[type="text"]:focus,
.partnership-form input[type="email"]:focus,
.partnership-form textarea:focus {
    border-color: var(--button-bg-color);
    outline: none;
}

.partnership-form .generate-btn { /* Re-using the generate-btn class for consistency */
    margin-top: 20px;
    width: auto;
}