/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --light-bg: #f8f9fa;
    --dark-bg: #1a252f;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --white: #ffffff;
    --shadow: 0 4px 15px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--primary-color);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
    color: var(--white);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Header and Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 45px;
    width: auto;
    transition: var(--transition);
}

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

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

.nav-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--secondary-color);
}

/* Mobile Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 5px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition);
    border-radius: 2px;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #2c3e50, #3498db);
    display: flex;
    align-items: center;
    position: relative;
    color: var(--white);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
    animation: fadeInUp 1s ease-out;
}

.hero-logo {
    margin-bottom: 2rem;
}

.hero-logo-img {
    height: 120px;
    width: auto;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: var(--white);
}

.company-info {
    text-align: center;
}

.mission-vision {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin: 3rem 0;
}

.mission-vision-card {
    padding: 2rem;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05), rgba(44, 62, 80, 0.05));
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-color);
    text-align: left;
    transition: var(--transition);
}

.mission-vision-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.values {
    margin-top: 3rem;
}

.values h3 {
    margin-bottom: 2rem;
}

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

.value-item {
    padding: 1.5rem;
    background: var(--light-bg);
    border-radius: var(--border-radius);
    transition: var(--transition);
    text-align: left;
}

.value-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Services Section */
.services {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--light-bg), #e8f4f8);
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 400"><defs><pattern id="construction" patternUnits="userSpaceOnUse" width="80" height="80"><rect width="80" height="80" fill="%23e9ecef" opacity="0.3"/><rect x="10" y="10" width="60" height="60" fill="none" stroke="%23adb5bd" stroke-width="1" opacity="0.2"/></pattern></defs><rect width="100%" height="100%" fill="url(%23construction)"/></svg>');
    background-size: 200px 200px;
    opacity: 0.5;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.service-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s;
}

.service-card:hover::before {
    left: 100%;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    font-size: 2rem;
    color: var(--white);
}

.service-icon span {
    font-size: 2rem;
}

.transport-icon {
    background: linear-gradient(135deg, var(--secondary-color), #2980b9);
}

.materials-icon {
    background: linear-gradient(135deg, var(--success-color), #229954);
}

.management-icon {
    background: linear-gradient(135deg, var(--warning-color), #e67e22);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.service-card ul {
    list-style: none;
    text-align: left;
}

.service-card li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.service-card li:last-child {
    border-bottom: none;
}

/* Advantages Section */
.advantages {
    padding: 6rem 0;
    background: var(--light-bg);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.advantage-card {
    padding: 2.5rem;
    background: var(--white);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s;
}

.advantage-card:hover::before {
    left: 100%;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.95), rgba(26, 37, 47, 0.95)),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 400"><defs><pattern id="contact-bg" patternUnits="userSpaceOnUse" width="120" height="120"><rect width="120" height="120" fill="%2334495e" opacity="0.3"/><circle cx="60" cy="60" r="30" fill="none" stroke="%23fff" stroke-width="1" opacity="0.1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23contact-bg)"/></svg>');
    background-size: 300px 300px;
    color: var(--white);
    position: relative;
}

.contact .section-title,
.contact .section-subtitle {
    color: var(--white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-card {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.directors {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.director-card {
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Contact Form */
.contact-form {
    background: rgba(255, 255, 255, 0.1);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.form-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: 1rem;
    border: none;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
    outline: none;
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    width: 100%;
    margin-top: 1rem;
}

.form-status {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    display: none;
}

.form-status.success {
    background: rgba(39, 174, 96, 0.2);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.form-status.error {
    background: rgba(231, 76, 60, 0.2);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
}

/* Footer */
footer {
    background: var(--dark-bg);
    color: var(--white);
    text-align: center;
    padding: 2rem;
}

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

[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .advantage-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.98);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow);
        padding: 2rem 0;
        backdrop-filter: blur(10px);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        padding: 1rem;
        display: block;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        color: var(--primary-color);
    }
    
    .hero-logo-img {
        height: 80px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 200px;
    }
    
    .about {
        padding: 4rem 0;
    }
    
    .mission-vision {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        margin: 2rem 0;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    .directors {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .advantage-grid {
        grid-template-columns: 1fr;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 2rem;
    }
    
    .form-group {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .contact-form {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-logo-img {
        height: 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .contact-form input,
    .contact-form textarea,
    .contact-form select {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    .service-card {
        padding: 1.5rem;
    }
    
    .advantage-grid > div {
        padding: 2rem;
    }
}

/* Print Styles */
@media print {
    .hamburger,
    .hero-buttons,
    .contact-form {
        display: none;
    }
    
    .hero {
        background: none;
        color: var(--text-dark);
        min-height: auto;
        padding: 2rem 0;
    }
    
    .section-title {
        color: var(--text-dark);
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --shadow: 0 4px 15px rgba(0,0,0,0.3);
        --shadow-hover: 0 8px 25px rgba(0,0,0,0.4);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}