/* Global Styles */
:root {
    --primary-color: #0056b3;
    --secondary-color: #004494;
    --white-color: #fff;
    --light-gray: #f8f9fa;
    --dark-gray: #343a40;
    --medium-gray: #6c757d;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
    color: var(--dark-gray);
    transition: var(--transition);
}

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

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    color: var(--white-color);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.section-title.text-left {
    text-align: left;
}

.section-title.text-left h2::after {
    left: 0;
    transform: none;
}

/* Header */
#header {
    background-color: var(--white-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
}

#header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo img {
    height: 75px;
}

nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
}

.nav-menu li {
    margin: 0 15px;
}

.nav-menu li a {
    font-weight: 500;
    padding: 5px 0;
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    bottom: 0;
    left: 0;
    transition: var(--transition);
}

.nav-menu li a:hover::after {
    width: 100%;
}

.header-contact {
    display: flex;
    align-items: center;
    color: var(--primary-color);
    font-weight: 500;
}

.header-contact i {
    margin-right: 10px;
    font-size: 1.2rem;
}

.mobile-menu-btn {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--dark-gray);
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    background-image: url('https://images.unsplash.com/photo-1586528116311-ad8dd3c8310d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    position: relative;
    display: flex;
    align-items: center;
    color: var(--white-color);
    text-align: center;
    margin-top: 80px;
}

.hero .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--white-color);
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

/* Features */
.features {
    padding: 5rem 0;
    background-color: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    background-color: var(--white-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: rgba(0, 86, 179, 0.1);
    color: var(--primary-color);
    font-size: 2.5rem;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 20px;
}

/* Services */
.services {
    padding: 5rem 0;
}

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

.service-item {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.service-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.service-item h3 {
    margin-bottom: 15px;
}

.service-item p {
    margin-bottom: 20px;
}

/* Fleet */
.fleet {
    padding: 5rem 0;
    background-color: var(--light-gray);
}

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

.fleet-item {
    background-color: var(--white-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.fleet-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: var(--transition);
}

.fleet-item:hover img {
    transform: scale(1.05);
}

.fleet-item h3 {
    padding: 20px 20px 10px;
}

.fleet-specs {
    padding: 0 20px 20px;
}

.fleet-specs li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.fleet-specs li i {
    margin-right: 10px;
    color: var(--primary-color);
}

.fleet-item .btn {
    margin: 0 20px 20px;
}

/* About Section */
.about {
    padding: 5rem 0;
}

.about-content {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
}

.about-image {
    flex: 1;
    min-width: 300px;
    border-radius: 8px;
    overflow: hidden;
    
}

.about-text {
    flex: 1;
    min-width: 300px;
}

.about-stats {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
    text-align: center;
}

.stat-item {
    flex: 1;
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

/* Testimonials */
.testimonials {
    padding: 5rem 0;
    background-color: var(--light-gray);
}

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

.testimonial-item {
    background-color: var(--white-color);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.testimonial-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.testimonial-content {
    margin-bottom: 20px;
    position: relative;
}

.testimonial-content::before {
    content: '\201C';
    font-size: 4rem;
    position: absolute;
    top: -20px;
    left: -10px;
    color: rgba(0, 86, 179, 0.1);
    font-family: serif;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-right: 15px;
    object-fit: cover;
}

.author-info h4 {
    margin-bottom: 5px;
}

.author-info p {
    font-size: 0.9rem;
    color: var(--medium-gray);
    margin-bottom: 0;
}

/* Contact Section */
.contact {
    padding: 5rem 0;
}

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

.contact-form {
    background-color: var(--white-color);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 86, 179, 0.2);
    outline: none;
}

.error-message {
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 5px;
    display: none;
}

.form-group.error input,
.form-group.error textarea {
    border-color: #dc3545;
}

.form-group.error .error-message {
    display: block;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.info-item {
    display: flex;
    align-items: flex-start;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-right: 15px;
    margin-top: 5px;
}

.info-item h3 {
    margin-bottom: 5px;
}

.info-item p {
    color: var(--medium-gray);
    margin-bottom: 0;
}

.map {
    margin-top: 50px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.map iframe {
    display: block;
}

/* Footer */
.footer {
    background-color: var(--dark-gray);
    color: var(--white-color);
    padding: 4rem 0 2rem;
}

.footer-top {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-info h3,
.footer-links h3,
.footer-social h3 {
    color: var(--white-color);
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-info p {
    color: #adb5bd;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.footer-info p i {
    margin-right: 10px;
    color: var(--primary-color);
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: #adb5bd;
}

.footer-links ul li a:hover {
    color: var(--white-color);
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white-color);
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.footer-bottom {
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #adb5bd;
    font-size: 0.9rem;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-5px);
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--white-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(0, 86, 179, 0.2);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Animations */
.fade-in {
    animation: fadeInUp 1s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Menu */
@media (max-width: 991px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -300px;
        width: 280px;
        height: 100%;
        background-color: var(--white-color);
        flex-direction: column;
        padding: 80px 20px 30px;
        z-index: 1001;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: var (--transition);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu li {
        margin: 15px 0;
    }
    
    .header-contact {
        display: none;
    }
    
    .close-menu {
        position: absolute;
        top: 20px;
        right: 20px;
        font-size: 1.5rem;
        cursor: pointer;
    }
}

/* Responsive Styles */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .about-stats {
        flex-wrap: wrap;
    }
    
    .stat-item {
        flex: 1 0 50%;
        margin-bottom: 20px;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .btn {
        padding: 8px 18px;
        font-size: 0.9rem;
    }
    
    .hero {
        min-height: 500px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
    }
    
    .info-item i {
        font-size: 1.2rem;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        bottom: 20px;
        right: 20px;
    }
    
    .stat-item {
        flex: 1 0 100%;
    }
}
.social-icons .zalo-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white-color);
    transition: var(--transition);
}

.social-icons .zalo-icon:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}
.social-icons .zalo-icon img {
    width: 29px;  
    height: 29px; 
    object-fit: contain;
}
.service-icon img.service-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    border-radius: 50%;
}