/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f0f2f5;
}

/* Header and Navigation */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 2rem;
}

.logo img {
    height: 40px;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #1a1a1a;
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.nav-links a:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #1a1a1a;
    transition: width 0.3s ease;
}

.nav-links a:hover:after,
.nav-links a.active:after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: #1a1a1a;
}

/* Content Wrapper */
.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.hero-section {
    background-color: #fff;
    padding: 2rem 0;
    margin-bottom: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
    padding: 0 2rem;
}

.hero-section h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1a1a1a;
    font-weight: 600;
}

.hero-subtitle {
    color: #666;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.search-container {
    display: flex;
    gap: 1rem;
    max-width: 600px;
}

.search-container input {
    flex: 1;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: border-color 0.3s ease;
    background-color: #f8f9fa;
}

.search-container input:focus {
    outline: none;
    border-color: #1a1a1a;
    background-color: #fff;
}

.search-container button {
    padding: 0.8rem 1.5rem;
    background-color: #1a1a1a;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    font-size: 0.9rem;
}

.search-container button:hover {
    background-color: #333;
}

/* Quick Links Section */
.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.link-card {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.link-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.card-icon {
    font-size: 1.8rem;
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.link-card h3 {
    color: #1a1a1a;
    margin-bottom: 0.8rem;
    font-size: 1.2rem;
}

.link-card p {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.link-card ul {
    list-style: none;
    margin: 1rem 0;
}

.link-card li {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

.link-card li i {
    color: #1a1a1a;
    font-size: 0.8rem;
}

/* Popular Searches Section */
.popular-searches {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.popular-searches h2 {
    margin-bottom: 1.5rem;
    color: #1a1a1a;
    font-size: 1.2rem;
}

.search-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.search-tags span {
    background-color: #f8f9fa;
    padding: 0.6rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #666;
}

.search-tags span i {
    color: #1a1a1a;
    font-size: 0.8rem;
}

.search-tags span:hover {
    background-color: #e9ecef;
    transform: translateY(-2px);
    color: #1a1a1a;
}

/* Footer */
footer {
    background-color: #1a1a1a;
    color: white;
    padding: 3rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    color: #fff;
    font-size: 1.1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-section a:hover {
    color: #fff;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: #ccc;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #fff;
}

.footer-bottom {
    max-width: 1200px;
    margin: 2rem auto 0;
    padding-top: 2rem;
    border-top: 1px solid #333;
    text-align: center;
    font-size: 0.9rem;
    color: #ccc;
}

/* Mobile Menu Styles */
.mobile-menu-button {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: #1a1a1a;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    z-index: 1000;
    padding: 2rem;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu .nav-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu .nav-links a {
    margin: 0;
    font-size: 1.2rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid #eee;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0.5rem 1rem;
    }

    .mobile-menu-button {
        display: block;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-section h1 {
        font-size: 1.8rem;
    }
    
    .search-container {
        flex-direction: column;
    }
    
    .search-container button {
        width: 100%;
    }
    
    .quick-links {
        grid-template-columns: 1fr;
    }

    .content-wrapper {
        padding: 1rem;
    }

    .hero-content {
        padding: 0 1rem;
    }

    .search-tags span {
        width: 100%;
        justify-content: center;
    }

    .billing-title {
        font-size: 1.5rem;
    }
}

.lab-bill-form {
    max-width: 500px;
    margin: 40px auto 0 auto;
    background: #fff;
    padding: 32px 32px 24px 32px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.form-instructions {
    margin-bottom: 32px;
    color: #222;
    font-size: 1rem;
    text-align: left;
    width: 100%;
}

.form-group {
    margin-bottom: 22px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
}

.form-group label {
    margin-bottom: 6px;
    font-size: 1rem;
    color: #222;
    font-weight: 500;
}

.required {
    color: #a94442;
    margin-left: 2px;
    font-size: 1rem;
}

.lab-bill-form input[type="text"] {
    width: 100%;
    padding: 7px 12px;
    border: 2px solid #222;
    border-radius: 5px;
    font-size: 1rem;
    background: #f8faff;
    color: #222;
    transition: border-color 0.2s;
}

.lab-bill-form input[type="text"]:focus {
    border-color: #3a3a1a;
    outline: none;
    background: #fff;
}

.submit-btn {
    margin-top: 10px;
    background: #2d3c1e;
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 10px 38px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.submit-btn:hover {
    background: #1d260f;
}

@media (max-width: 600px) {
    .lab-bill-form {
        padding: 18px 8px 16px 8px;
    }
    .lab-bill-form input[type="text"] {
        width: 100%;
    }
    .submit-btn {
        width: 100%;
    }
}

.billing-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 32px;
    margin-top: 10px;
}

.billing-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 10px;
}

.billing-title {
    font-size: 2.4rem;
    color: #6dbb6d;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: 1px;
    text-align: center;
}

.billing-subtitle {
    font-size: 1.15rem;
    color: #222;
    margin-bottom: 10px;
    text-align: center;
}

@media (max-width: 600px) {
    .billing-title {
        font-size: 1.5rem;
    }
    .billing-logo {
        width: 40px;
        height: 40px;
    }
}

.proceed-to-payment {
    text-align: center;
    margin-top: 30px;
}

.proceed-to-payment p {
    margin-bottom: 10px;
    font-size: 1.1rem;
    color: #555;
}

.payment-link {
    display: inline-block;
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.payment-link:hover {
    background-color: #0056b3;
}