:root {
    --background-color-light: #f0f2f5;
    --text-color-light: #333;
    --container-bg-light: #fff;
    --button-bg-light: #007bff;
    --button-hover-bg-light: #0056b3;
    --number-bg-light: #f8f9fa;
    --number-border-light: #dee2e6;
    --h1-color-light: #007bff;
    --form-input-bg-light: #f8f9fa;
    --form-input-border-light: #dee2e6;
    --form-input-text-light: #333;

    --background-color-dark: #121212;
    --text-color-dark: #e0e0e0;
    --container-bg-dark: #1e1e1e;
    --button-bg-dark: #BB86FC;
    --button-hover-bg-dark: #3700B3;
    --number-bg-dark: #2c2c2c;
    --number-border-dark: #444;
    --h1-color-dark: #BB86FC;
    --form-input-bg-dark: #2c2c2c;
    --form-input-border-dark: #444;
    --form-input-text-dark: #e0e0e0;
}

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

html[data-theme='dark'] body {
    background-color: var(--background-color-dark);
    color: var(--text-color-dark);
}

.container {
    text-align: center;
    background: var(--container-bg-light);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease;
    max-width: 500px;
    width: 90%;
}

html[data-theme='dark'] .container {
    background: var(--container-bg-dark);
}

h1 {
    color: var(--h1-color-light);
    margin-bottom: 1.5rem;
    transition: color 0.3s ease;
}

html[data-theme='dark'] h1 {
    color: var(--h1-color-dark);
}

#generate-btn, #theme-toggle-btn {
    background-color: var(--button-bg-light);
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin: 5px;
}

html[data-theme='dark'] #generate-btn, html[data-theme='dark'] #theme-toggle-btn {
    background-color: var(--button-bg-dark);
}

#generate-btn:hover, #theme-toggle-btn:hover {
    background-color: var(--button-hover-bg-light);
}

html[data-theme='dark'] #generate-btn:hover, html[data-theme='dark'] #theme-toggle-btn:hover {
    background-color: var(--button-hover-bg-dark);
}

#numbers-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 2rem;
    margin-bottom: 2rem;
}

.number {
    width: 50px;
    height: 50px;
    background-color: var(--number-bg-light);
    border: 1px solid var(--number-border-light);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

html[data-theme='dark'] .number {
    background-color: var(--number-bg-dark);
    border: 1px solid var(--number-border-dark);
    color: var(--text-color-dark);
}

/* Contact Form Styles */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 2rem;
    text-align: left;
}

.contact-form input[type="email"],
.contact-form textarea {
    padding: 10px;
    border-radius: 5px;
    border: 1px solid var(--form-input-border-light);
    background-color: var(--form-input-bg-light);
    color: var(--form-input-text-light);
    font-size: 1rem;
    transition: all 0.3s ease;
}

html[data-theme='dark'] .contact-form input[type="email"],
html[data-theme='dark'] .contact-form textarea {
    border: 1px solid var(--form-input-border-dark);
    background-color: var(--form-input-bg-dark);
    color: var(--form-input-text-dark);
}

.contact-form input[type="email"]:focus,
.contact-form textarea:focus {
    border-color: var(--button-bg-light);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

html[data-theme='dark'] .contact-form input[type="email"]:focus,
html[data-theme='dark'] .contact-form textarea:focus {
    border-color: var(--button-bg-dark);
    box-shadow: 0 0 0 2px rgba(187, 134, 252, 0.25);
}

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

.contact-form button[type="submit"] {
    background-color: var(--button-bg-light);
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    align-self: center;
    width: fit-content;
}

html[data-theme='dark'] .contact-form button[type="submit"] {
    background-color: var(--button-bg-dark);
}

.contact-form button[type="submit"]:hover {
    background-color: var(--button-hover-bg-light);
}

html[data-theme='dark'] .contact-form button[type="submit"]:hover {
    background-color: var(--button-hover-bg-dark);
}