:root {
    --bg-color: #ffffff;
    --text-color: #121212;
    --container-bg: #f9f9f9;
    --number-bg: #e0e0e0;
    --btn-bg: #4CAF50;
    --btn-hover: #45a049;
    --btn-text: #ffffff;
    --input-bg: #ffffff;
    --input-border: #cccccc;
}

[data-theme='dark'] {
    --bg-color: #121212;
    --text-color: #ffffff;
    --container-bg: #1e1e1e;
    --number-bg: #333333;
    --input-bg: #2a2a2a;
    --input-border: #444444;
}

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

.container {
    text-align: center;
    padding: 2rem;
    background-color: var(--container-bg);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s;
    width: 90%;
    max-width: 500px;
    margin: 20px;
}

.theme-btn {
    background-color: #555;
    color: white;
    padding: 5px 15px;
    border: none;
    border-radius: 20px;
    margin-bottom: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

[data-theme='dark'] .theme-btn {
    background-color: #eee;
    color: #222;
}

.lotto-numbers {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 30px 0;
}

.number {
    width: 50px;
    height: 50px;
    background-color: var(--number-bg);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    transition: background-color 0.3s;
}

#generator-btn {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
}

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

.divider {
    border: none;
    border-top: 1px solid var(--input-border);
    margin: 40px 0;
}

.contact-form-section {
    text-align: left;
}

.contact-form-section h2 {
    text-align: center;
    margin-bottom: 20px;
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    box-sizing: border-box;
    font-family: inherit;
}

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

.submit-btn {
    background-color: #2196F3;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    width: 100%;
    margin-top: 10px;
}

.submit-btn:hover {
    background-color: #1976D2;
}