:root {
    --color-primary: #1a4b8c;
    --color-secondary: #2c3e50;
    --color-accent: #3498db;
    --color-gray: #707070;
    --color-light: #f5f6fa;
    --color-white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--color-secondary);
}

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

/* Header & Navigation */
.header {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 20px 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--color-white);
}

.logo span {
    color: var(--color-accent);
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--color-accent);
}

.mobile-menu-btn {
    display: none;
}

/* Hero Section */
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    background-position: center !important;
    background-size: cover !important;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 75, 140, 0.85);
}

.hero > *:not(.hero-bg) {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 800px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

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

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

.cta-buttons {
    display: flex;
    gap: 20px;
}

/* Sections */
section {
    padding: 80px 0;
}

h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--color-primary);
}

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

.service-card {
    background: var(--color-white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card i {
    font-size: 40px;
    color: var(--color-accent);
    margin-bottom: 20px;
}

.service-card h3 {
    margin-bottom: 15px;
    color: var(--color-primary);
}

/* Advantages */
.advantages {
    background-color: var(--color-light);
}

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

.advantage-card {
    background: var(--color-white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
}

.advantage-card i {
    font-size: 40px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

/* Gallery */
.gallery {
    background-color: var(--color-light);
    padding: 80px 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin: 0 auto;
    max-width: 1400px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 10px;
    box-shadow: var(--shadow);
    background-color: var(--color-white);
    padding: 10px;
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 5px;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.02);
}

@media (max-width: 768px) {
    .gallery-grid {
        grid-template-columns: 1fr;
        padding: 0 20px;
    }
}

/* Quote Form */
.quote {
    background-color: var(--color-light);
}

.quote-form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-group label {
    font-weight: 500;
}

.form-group input,
.form-group select {
    padding: 12px;
    border: 1px solid var(--color-gray);
    border-radius: 5px;
    font-size: 16px;
}

/* Certificates */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    justify-items: center;
}

.certificate-card {
    text-align: center;
}

.certificate-card img {
    width: 200px;
    height: 280px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 15px;
    box-shadow: var(--shadow);
}

/* Contacts */
.contacts-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-item i {
    font-size: 24px;
    color: var(--color-primary);
}

.map {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

/* Footer */
.footer {
    background-color: var(--color-secondary);
    color: var(--color-white);
    padding: 40px 0;
}

.footer-content {
    text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 18px;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        cursor: pointer;
        width: 30px;
        height: 20px;
        position: relative;
    }

    .mobile-menu-btn span,
    .mobile-menu-btn span::before,
    .mobile-menu-btn span::after {
        position: absolute;
        width: 100%;
        height: 2px;
        background-color: var(--color-white);
        transition: 0.3s;
    }

    .mobile-menu-btn span {
        top: 50%;
        transform: translateY(-50%);
    }

    .mobile-menu-btn span::before {
        content: '';
        top: -8px;
    }

    .mobile-menu-btn span::after {
        content: '';
        bottom: -8px;
    }

    .cta-buttons {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    section {
        padding: 60px 0;
    }

    h2 {
        font-size: 28px;
        margin-bottom: 30px;
    }
}