:root {
    --background-color: #f0f2f5;
    --text-color: #333;
    --number-bg-color: #fff;
    --button-bg-color: #007bff;
    --button-hover-bg-color: #0056b3;
    --button-text-color: white;
}

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

body.dark-mode {
    --background-color: #1a1a1a;
    --text-color: #fff;
    --number-bg-color: #333;
    --button-bg-color: #bb86fc;
    --button-hover-bg-color: #a052d3;
    --button-text-color: #1a1a1a;
    --border-color: #555;
}

.container {
    display: flex;
    gap: 40px;
    width: 100%;
    max-width: 1200px;
}

.main-content {
    flex: 2;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.sidebar {
    flex: 1;
    border-left: 1px solid var(--border-color);
    padding-left: 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar h2 {
    text-align: center;
}

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

.number {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--number-bg-color);
    border: 2px solid;
    font-size: 24px;
    font-weight: bold;
    transition: background-color 0.3s;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
    background-color: var(--button-bg-color);
    color: var(--button-text-color);
    transition: background-color 0.3s;
}

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

.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
}

.theme-switch {
    display: inline-block;
    height: 34px;
    position: relative;
    width: 60px;
}

.theme-switch input {
    display:none;
}

.slider {
    background-color: #ccc;
    bottom: 0;
    cursor: pointer;
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    transition: .4s;
}

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 26px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 26px;
}

input:checked + .slider {
    background-color: #2196F3;
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Contact Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
}

.contact-form label {
    font-weight: bold;
    color: var(--text-color);
}

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

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

.contact-form button[type="submit"] {
    background-color: #28a745; /* A distinct color for submit */
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

.contact-form button[type="submit"]:hover {
    background-color: #218838;
}

/* Responsive Layout */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
        gap: 20px;
    }

    .sidebar {
        border-left: none;
        border-top: 1px solid var(--border-color);
        padding-left: 0;
        padding-top: 20px;
    }
}