:root {
    /* Light Mode Variables */
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
    --container-bg: #ffffff;
    --text-color: #333333;
    --heading-color: #007bff;
    --border-color: #dddddd;
    --input-bg: #ffffff;
    --input-text: #333333;
    --button-text: #ffffff;
    --success-color: #28a745;
    --error-color: #dc3545;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    /* Dark Mode Variables */
    --primary-color: #3793ff;
    --secondary-color: #adb5bd;
    --background-color: #121212;
    --container-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --heading-color: #3793ff;
    --border-color: #444444;
    --input-bg: #2d2d2d;
    --input-text: #ffffff;
    --button-text: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    margin: 0;
    padding: 20px;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--container-bg);
    padding: 60px 30px 30px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
    position: relative;
}

header {
    text-align: center;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

h1 {
    color: var(--heading-color);
    margin: 0;
    font-size: 1.8em;
}

header p {
    color: var(--secondary-color);
    margin-top: 5px;
}

.theme-toggle-container {
    position: absolute;
    top: 25px;
    right: 30px;
    z-index: 10;
}

/* Theme Switch Styling */
.theme-switch {
    position: relative;
    display: inline-block;
    width: 70px;
    height: 36px;
}

.theme-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #e0e0e0;
    transition: .4s;
    border-radius: 36px;
    border: 2px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

input:checked + .slider {
    background-color: #2c3e50; /* A darker background for the switch in dark mode */
    border-color: #4a627a;
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(34px);
}

/* Let's use separate spans or just icons on the slider background */
.theme-switch .slider {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="%23666" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"></path></svg>');
    background-repeat: no-repeat;
    background-position: 44px center; /* Moon on the right when in light mode */
}

body.dark-mode .slider {
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="gold" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"></svg>');
    background-position: 8px center; /* Sun on the left when in dark mode */
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
    background-color: var(--input-bg);
    color: var(--input-text);
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea {
    resize: vertical;
}

button[type="submit"] {
    display: block;
    width: 100%;
    padding: 15px;
    border: none;
    background-color: var(--primary-color);
    color: var(--button-text);
    font-size: 1.2em;
    font-weight: 600;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
}

button[type="submit"]:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.inquiry-message {
    background-color: #f1f8ff;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    margin-bottom: 20px;
}

.inquiry-message p {
    color: var(--text-color);
    font-weight: 500;
    margin: 0;
}

body.dark-mode .inquiry-message {
    background-color: #1a2733;
    border-left-color: var(--primary-color);
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    .container {
        padding: 70px 20px 20px 20px;
    }

    .theme-toggle-container {
        top: 15px;
        right: 15px;
    }
}