:root {
    --background-color: #f4f4f4;
    --container-bg: #fff;
    --text-color: #000;
    --input-border-color: #ccc;
    --button-bg: #007bff;
    --button-text-color: #fff;
    --button-hover-bg: #0056b3;
}

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

body.dark-mode {
    --background-color: #222;
    --container-bg: #333;
    --text-color: #fff;
    --input-border-color: #555;
    --button-bg: #555;
    --button-text-color: #fff;
    --button-hover-bg: #777;
}

.container {
    background-color: var(--container-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: background-color 0.3s;
}

h1 {
    margin-bottom: 1.5rem;
}

.calculator {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.input-group label {
    margin-bottom: 0.5rem;
}

.input-group input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--input-border-color);
    border-radius: 4px;
    background-color: var(--container-bg);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

button {
    padding: 0.75rem;
    border: none;
    border-radius: 4px;
    background-color: var(--button-bg);
    color: var(--button-text-color);
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

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

#theme-toggle-btn {
    margin-top: 1rem;
}

.result {
    margin-top: 1.5rem;
    font-size: 1.2rem;
    font-weight: bold;
}

/* Styles for Contact Form */
.contact-page body {
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Align to start to prevent form from stretching across entire height */
    min-height: 100vh; /* Use min-height for scrollable content */
    padding: 2rem 0; /* Add some vertical padding */
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.5rem;
}

.contact-form .input-group label {
    margin-bottom: 0.5rem;
}

.contact-form .input-group input,
.contact-form .input-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--input-border-color);
    border-radius: 4px;
    background-color: var(--container-bg);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
    box-sizing: border-box; /* Ensures padding doesn't add to the width */
}

.contact-form button[type="submit"] {
    margin-top: 1rem;
}