:root {
    --bg-color-light: #f4f7f6;
    --text-color-light: #333;
    --primary-color-light: #007BFF;
    --card-bg-light: #fff;
    --footer-bg-light: #e9ecef;
}

body.dark-mode {
    --bg-color-dark: #121212;
    --text-color-dark: #e0e0e0;
    --primary-color-dark: #6a9eff;
    --card-bg-dark: #1e1e1e;
    --footer-bg-dark: #333;

    background-color: var(--bg-color-dark);
    color: var(--text-color-dark);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color-light);
    color: var(--text-color-light);
    transition: background-color 0.3s, color 0.3s;
}

body.dark-mode header,
body.dark-mode footer,
body.dark-mode .service-card {
    background-color: var(--card-bg-dark);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: var(--card-bg-light);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color-light);
}

body.dark-mode .logo {
    color: var(--primary-color-dark);
}

nav a {
    margin-left: 1.5rem;
    color: var(--text-color-light);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

body.dark-mode nav a {
    color: var(--text-color-dark);
}

nav a:hover {
    color: var(--primary-color-light);
}

body.dark-mode nav a:hover {
    color: var(--primary-color-dark);
}

/* Light/Dark Mode Toggle */
.mode-toggle input[type="checkbox"] {
    display: none;
}

.mode-toggle label {
    cursor: pointer;
    width: 40px;
    height: 20px;
    background: #ccc;
    display: block;
    border-radius: 10px;
    position: relative;
    transition: background-color 0.3s;
}

.mode-toggle label:after {
    content: '';
    width: 16px;
    height: 16px;
    background: #fff;
    position: absolute;
    top: 2px;
    left: 2px;
    border-radius: 50%;
    transition: transform 0.3s;
}

.mode-toggle input[type="checkbox"]:checked + label {
    background: #4CAF50;
}

.mode-toggle input[type="checkbox"]:checked + label:after {
    transform: translateX(20px);
}

/* Main content */
main {
    padding: 2rem 5%;
}

.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 3rem;
    color: var(--primary-color-light);
}

body.dark-mode .hero h1 {
    color: var(--primary-color-dark);
}

#services {
    text-align: center;
    padding: 2rem 0;
}

.services-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

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

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

#contact {
    text-align: center;
    padding: 4rem 0;
}

.contact-button {
    display: inline-block;
    padding: 0.8rem 2rem;
    margin-top: 1rem;
    background-color: var(--primary-color-light);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: background-color 0.3s, transform 0.3s;
}

body.dark-mode .contact-button {
    background-color: var(--primary-color-dark);
}

.contact-button:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

body.dark-mode .contact-button:hover {
    background-color: #5587e9;
}

footer {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--footer-bg-light);
    border-top: 1px solid #ccc;
}

body.dark-mode footer {
    background-color: var(--footer-bg-dark);
    border-top: 1px solid #444;
}

/* Chatbot styles */
#chatbot-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

#chatbot-toggle-button {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background-color: var(--primary-color-light);
    color: white;
    font-size: 2rem;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s;
}

#chatbot-toggle-button:hover {
    transform: scale(1.1);
}

body.dark-mode #chatbot-toggle-button {
    background-color: var(--primary-color-dark);
}

#chatbot-box {
    width: 300px;
    height: 400px;
    background-color: var(--card-bg-light);
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    display: none; /* Initially hidden */
    flex-direction: column;
    position: absolute;
    bottom: 80px;
    right: 0;
}

body.dark-mode #chatbot-box {
    background-color: var(--card-bg-dark);
}

#chatbot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: var(--primary-color-light);
    color: white;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
}

body.dark-mode #chatbot-header {
    background-color: var(--primary-color-dark);
}

#chatbot-messages {
    flex-grow: 1;
    padding: 10px;
    overflow-y: auto;
}

#chatbot-input {
    width: calc(100% - 20px);
    padding: 10px;
    margin: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}