/* General Body Styles */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #f5f5f5; /* Light grey background */
    color: #333; /* Dark grey text */
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header and Navigation */
header {
    background-color: #222; /* Dark black */
    color: #fff;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #eee; /* Light grey for logo */
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}

header nav ul li {
    margin-left: 25px;
}

header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

header nav ul li a:hover {
    color: #bbb; /* Lighter grey on hover */
}

/* Hero Section */
.hero {
    background: url('Untitled design2.png') center/cover ; /* Aircon related image */
    color: #fff;
    text-align: center;
    padding: 150px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5); /* Overlay for readability */
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 4em;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
}

.hero p {
    font-size: 1.5em;
    margin-bottom: 40px;
}

.btn {
    background-color: #555; /* Medium grey button */
    color: #fff;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1.1em;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #777; /* Lighter grey on hover */
}

/* About Us Section */
.about-us {
    background-color: #fff;
    padding: 80px 0;
    text-align: center;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.about-us.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.about-us h2 {
    font-size: 2.5em;
    color: #333;
    margin-bottom: 30px;
}

.about-us p {
    font-size: 1.1em;
    max-width: 800px;
    margin: 0 auto;
}

/* Services Section */
.services {
    background: url('Untitled design1.png') center/cover ; /* Light grey */
    padding: 80px 0;
    text-align: center;
    opacity: 50;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.services.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.services h2 {
    font-size: 2.5em;
    color: #ffffff;
    margin-bottom: 50px;
    padding-right: 800px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.service-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    text-align: left;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
}

.service-item h3 {
    color: #555; /* Medium grey for service titles */
    font-size: 1.8em;
    margin-bottom: 15px;
}

.service-item p {
    color: #666; /* Slightly lighter grey for service text */
    font-size: 1em;
}

/* Contact Us Section */
.contact-us {
    background-color: #333; /* Dark grey background */
    color: #fff;
    padding: 80px 0;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.contact-us.fade-in {
    opacity: 1;
    transform: translateY(0);
}

.contact-us h2 {
    font-size: 2.5em;
    margin-bottom: 30px;
    color: #fff;
}

.contact-us p {
    font-size: 1.1em;
    margin-bottom: 40px;
}

.contact-us form {
    max-width: 600px;
    margin: 0 auto;
    background-color: #444; /* Slightly lighter dark grey for form background */
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #eee;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
    width: calc(100% - 20px);
    padding: 12px;
    border: 1px solid #666;
    border-radius: 5px;
    background-color: #555;
    color: #fff;
    font-size: 1em;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #ccc;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #bbb;
    outline: none;
    box-shadow: 0 0 5px rgba(255,255,255,0.3);
}

.contact-us .btn {
    background-color: #777; /* Darker grey button for contact form */
    border: none;
    cursor: pointer;
    width: 100%;
    padding: 15px;
    font-size: 1.2em;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.contact-us .btn:hover {
    background-color: #999; /* Lighter grey on hover */
}

/* Footer */
footer {
    background-color: #222; /* Dark black */
    color: #fff;
    text-align: center;
    padding: 25px 0;
    font-size: 0.9em;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

footer.fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    header nav {
        flex-direction: column;
    }

    header nav ul {
        margin-top: 15px;
    }

    header nav ul li {
        margin: 0 10px;
    }

    .hero h1 {
        font-size: 3em;
    }

    .hero p {
        font-size: 1.2em;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .contact-us form {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.5em;
    }

    .hero p {
        font-size: 1em;
    }

    .btn {
        padding: 10px 20px;
        font-size: 1em;
    }

    .about-us h2, .services h2, .contact-us h2 {
        font-size: 2em;
    }
}

footer .container {
    padding: 0 20px;
}