:root {
    --primary: #1a237e; /* Темно-синий */
    --primary-dark: #0d1440; /* Очень темно-синий */
    --secondary: #d32f2f; /* Ярко-красный */
    --dark: #212121; /* Темно-серый */
    --light: #f5f5f5; /* Светло-серый */
    --gray: #757575; /* Серый */
    --success: #388e3c; /* Зеленый */
    --danger: #d32f2f; /* Красный */
    --shadow: 0 10px 20px rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --border-radius: 12px;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    color: var(--primary);
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 1.5rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

header.scrolled {
    padding: 1rem 0;
    background: rgba(26, 35, 126, 0.98);
    backdrop-filter: blur(10px);
}

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

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 0.5px;
    color: white;
}

.logo i {
    color: var(--secondary);
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
    font-size: 1.05rem;
}

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

nav ul li a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    color: var(--secondary);
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 800px;
    display: flex;
    align-items: center;
    background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), 
                url('https://images.unsplash.com/photo-1579389083078-4e7018379f7e?ixlib=rb-4.0.3&auto=format&fit=crop&w=1470&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: white;
    text-align: center;
    padding-top: 80px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background: linear-gradient(transparent, var(--light));
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
    color: white;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2.2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
    cursor: pointer;
    font-size: 1.05rem;
    border: none;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 5px 15px rgba(26, 35, 126, 0.4);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(26, 35, 126, 0.6);
}

.btn-outline {
    border: 2px solid white;
    color: white;
    font-weight: 500;
    padding: 0.8rem 1.8rem;
}

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

.btn-secondary {
    background-color: var(--secondary);
    color: white;
    box-shadow: 0 5px 15px rgba(211, 47, 47, 0.4);
}

.btn-secondary:hover {
    background-color: #b71c1c;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(211, 47, 47, 0.6);
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background-color: var(--secondary);
    border-radius: 2px;
}

.section-title p {
    color: var(--gray);
    max-width: 700px;
    margin: 1.5rem auto 0;
    font-size: 1.1rem;
}

/* Service Cards */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    z-index: 1;
    border: 1px solid rgba(0,0,0,0.05);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    z-index: -1;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    color: white;
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.service-card:hover .service-icon {
    background-color: white;
    color: var(--primary);
    transform: rotateY(180deg);
}

.service-card:hover .btn-outline {
    background-color: white;
    color: var(--primary);
}

.service-image {
    height: 220px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.service-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--secondary);
    color: white;
    padding: 0.3rem 1.2rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.service-content {
    padding: 2.5rem 2rem;
    position: relative;
}

.service-icon {
    width: 70px;
    height: 70px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(26, 35, 126, 0.3);
}

.service-title {
    font-size: 1.6rem;
    margin-bottom: 1.2rem;
}

.service-description {
    margin-bottom: 1.8rem;
    color: var(--gray);
    transition: var(--transition);
    font-size: 1.05rem;
}

.service-card:hover .service-description {
    color: rgba(255,255,255,0.9);
}

.service-features {
    margin-bottom: 2.5rem;
}

.service-features li {
    list-style: none;
    margin-bottom: 0.7rem;
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-size: 0.95rem;
}

.service-features li i {
    color: var(--success);
    font-size: 0.9rem;
}

.service-price {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.8rem;
    color: var(--primary);
    transition: var(--transition);
    display: flex;
    align-items: flex-start;
}

.service-price span {
    font-size: 1rem;
    font-weight: normal;
    opacity: 0.8;
    margin-top: 0.3rem;
    margin-left: 0.3rem;
}

.service-card:hover .service-price {
    color: white;
}

/* About Section */
.about {
    background-color: white;
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background-color: rgba(26, 35, 126, 0.05);
    border-radius: 50%;
    z-index: 0;
}

.about::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 400px;
    height: 400px;
    background-color: rgba(211, 47, 47, 0.05);
    border-radius: 50%;
    z-index: 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.about-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 10px solid white;
    transform: rotate(-3deg);
    transition: var(--transition);
}

.about-image:hover {
    transform: rotate(0deg);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

.about-text h3 {
    font-size: 2.2rem;
    margin-bottom: 1.8rem;
    color: var(--primary);
    line-height: 1.3;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--gray);
    font-size: 1.05rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.8rem 1rem;
    background-color: var(--light);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.05);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
    background-color: var(--primary);
    color: white;
}

.stat-item:hover .stat-number {
    color: white;
}

.stat-item:hover .stat-text {
    color: rgba(255,255,255,0.9);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.stat-text {
    font-size: 0.95rem;
    color: var(--gray);
    transition: var(--transition);
    font-weight: 500;
}

/* Portfolio Section */
.portfolio {
    background-color: var(--light);
    position: relative;
}

.portfolio::before {
    content: '';
    position: absolute;
    top: 50px;
    right: -100px;
    width: 300px;
    height: 300px;
    background-color: rgba(26, 35, 126, 0.05);
    border-radius: 50%;
    z-index: 0;
}

.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.7rem 1.8rem;
    background-color: white;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
}

.filter-btn.active, .filter-btn:hover {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 5px 15px rgba(26, 35, 126, 0.3);
}

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

.portfolio-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.portfolio-img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(26, 35, 126, 0.9), rgba(211, 47, 47, 0.9));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition);
    padding: 2rem;
    text-align: center;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-title {
    color: white;
    font-size: 1.6rem;
    margin-bottom: 0.8rem;
    transform: translateY(20px);
    transition: var(--transition);
}

.portfolio-category {
    color: rgba(255,255,255,0.9);
    transform: translateY(20px);
    transition: var(--transition);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.portfolio-item:hover .portfolio-title,
.portfolio-item:hover .portfolio-category {
    transform: translateY(0);
}

.portfolio-link {
    color: white;
    background-color: rgba(255,255,255,0.2);
    padding: 0.7rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transform: translateY(20px);
    transition: var(--transition);
    opacity: 0;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255,255,255,0.3);
}

.portfolio-item:hover .portfolio-link {
    transform: translateY(0);
    opacity: 1;
    transition-delay: 0.1s;
}

.portfolio-link:hover {
    background-color: rgba(255,255,255,0.3);
}

/* Contact Section */
.contact {
    background-color: var(--light);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background-color: rgba(26, 35, 126, 0.05);
    border-radius: 50%;
    z-index: 0;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 4rem;
    position: relative;
    z-index: 1;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(26, 35, 126, 0.3);
    transition: var(--transition);
}

.contact-item:hover .contact-icon {
    background-color: var(--secondary);
    transform: rotate(15deg);
}

.contact-text h3 {
    font-size: 1.3rem;
    margin-bottom: 0.7rem;
}

.contact-text p, .contact-text a {
    color: var(--gray);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1.05rem;
}

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

.contact-form {
    background-color: white;
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(0,0,0,0.05);
}

.form-group {
    margin-bottom: 1.8rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 1rem 1.2rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--light);
}

.form-control:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(26, 35, 126, 0.2);
    background-color: white;
}

textarea.form-control {
    min-height: 180px;
    resize: vertical;
}

/* Footer */
footer {
    background-color: var(--dark);
    color: white;
    padding: 5rem 0 2rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 10px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.7rem;
    color: white;
}

.footer-logo i {
    color: var(--secondary);
}

.footer-about p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 1.2rem;
    color: white;
}

.social-link:hover {
    background-color: var(--primary);
    transform: translateY(-3px);
}

.footer-links h3 {
    font-size: 1.4rem;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 0.8rem;
    color: white;
}

.footer-links h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--secondary);
}

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

.footer-links li {
    margin-bottom: 1rem;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-size: 1.05rem;
}

.footer-links a:hover {
    color: var(--secondary);
    padding-left: 7px;
}

.footer-links a i {
    font-size: 0.8rem;
    color: var(--secondary);
}

.footer-newsletter p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.newsletter-input {
    flex: 1;
    padding: 1rem 1.2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    background-color: rgba(255,255,255,0.1);
    color: white;
}

.newsletter-input::placeholder {
    color: rgba(255,255,255,0.6);
}

.newsletter-btn {
    background-color: var(--secondary);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.newsletter-btn:hover {
    background-color: #b71c1c;
}

.footer-bottom {
    text-align: center;
    padding-top: 3rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.5);
    font-size: 0.95rem;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    border: none;
    cursor: pointer;
}

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

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

/* Responsive Styles */
@media (max-width: 1200px) {
    .hero h1 {
        font-size: 3rem;
    }
}

@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .hero h1 {
        font-size: 2.7rem;
    }
    
    .section-title h2 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    nav ul {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--primary-dark);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        transition: var(--transition);
    }
    
    nav ul.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero {
        min-height: 700px;
        padding-top: 70px;
    }
    
    .hero h1 {
        font-size: 2.4rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .section {
        padding: 4rem 0;
    }
    
    .stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        order: -1;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .section-title h2 {
        font-size: 1.8rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}