:root {
    --primary-color: #5e6263;
    --primary-dark: #272a32;
    --secondary-color: #666666;
    --background-color: #ffffff;
    --text-color: #333333;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

body.menu-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
    height: 100vh;
    top: 0;
    left: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

/* Header */
.header {
    background-color: rgba(255, 255, 255, 0.8);
    filter: blur(0px);
    backdrop-filter: blur(5px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--text-color);
    z-index: 1002;
    text-decoration: none;
    text-transform: uppercase;
}
.logo img {
    width: 20px;
    height: 20px;
    margin-right: 5px;
}
.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition);
}

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

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    font-size: 1.5rem;
    color: var(--primary-color);
    z-index: 1002;
    transition: var(--transition);
}

.mobile-menu-btn:focus {
    outline: none;
}

.mobile-menu-btn.active {
    position: fixed;
    right: var(--spacing-sm);
    color: var(--text-color);
}

.mobile-menu-btn.active .fa-bars {
    display: none;
}

.mobile-menu-btn:not(.active) .fa-times {
    display: none;
}
.mobile-menu-btn.active .fa-times {
    display: block;
}
/* Hero Section */
.hero {
    margin-top: 65px;
    padding: calc(var(--spacing-lg) * 2) 0 var(--spacing-lg);
    background: linear-gradient(rgba(45, 48, 56, 0.8), rgba(1, 5, 48, 0.8)),
        url('../img/main-bg.webp');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.hero h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: 400;
    color: #f8f9fa;
}

.hero p {
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}
.hero-buttons button a {
    text-decoration: none;
    color: white;
}
/* Buttons */
.btn {
    padding: 0.8em 1.6em;
    border-radius: var(--border-radius);
    border: none;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

.btn.secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Sections */
section {
    padding: var(--spacing-lg) 0;
}

section h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
}

/* Advantages */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.advantage-card {
    text-align: center;
    padding: var(--spacing-md);
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

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

.advantage-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

/* Services */
.services {
    background-color: #f8f9fa;
    background-image: url('../img/bg-service.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
}

.services .container {
    position: relative;
}

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

.service-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    justify-content: center;
    background-color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}
.service-card p {
    margin-top: 40px;
}
.service-card:hover {
    transform: translateY(-5px);
}

.service-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

/* Equipment */
.title {
    /* text-align: center; */
    margin-bottom: var(--spacing-lg);
    /* color: var(--primary-color); */
}
.equipment-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.equipment-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.equipment-item {
    text-align: center;
}

.equipment-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.equipment-item:hover .equipment-image {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.equipment-item h4 {
    color: var(--primary-color);
    margin-top: var(--spacing-sm);
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.brand {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm);
    border: 1px solid #eee;
    border-radius: var(--border-radius);
    transition: var(--transition);
}
.brand.hidden {
    display: none;
}

.show-more-brands {
    margin-top: var(--spacing-md);
    /* width: 100%; */
    cursor: pointer;
    text-align: center;
}
.brand img {
    width: 100%;
    max-height: 80px;
}

/* About */
.about {
    background: linear-gradient(rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.95)),
        url('../img/about-bg.webp');
    background-size: cover;
    background-position: center;
}
.about_decsr {
    text-indent: 30px;
    margin-bottom: 30px;
}
.about_decsr span {
    color: var(--primary-color);
}
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.about-card {
    text-align: center;
    padding: var(--spacing-md);
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.about-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}
.swiper {
    width: 70%;
    height: 300px;
}
.swiper-pagination-bullet-active {
    background-color: var(--primary-color) !important;
}
.swiper-button-prev,
.swiper-button-next {
    color: var(--primary-color) !important;
    font-size: 10px !important;
}
.testimonials .testimonials_title {
    margin-bottom: 20px;
}
.testimonial {
    padding: 30px;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}
.testimonial .quote {
    font-style: italic;
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: #333;
}
.testimonial .quote span {
    font-weight: bold;
    color: var(--primary-color);
}

.testimonial .author {
    font-weight: normal;
    font-size: 1.2rem;
    font-style: italic;
    margin-bottom: 5px;
}
.testimonial .author span {
    font-weight: normal;
    font-style: italic;
    font-size: 0.9rem;
}

.testimonial .position {
    color: #888;
    font-size: 0.95rem;
}

.faq {
    padding: var(--spacing-lg) 0;
}

.faq h2 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

.faq-grid {
    display: grid;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question h3 {
    margin: 0;
    font-size: 1.1rem;
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-answer {
    padding: 0 var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.active .faq-question {
    background-color: var(--primary-color);
    color: white;
}

.faq-item.active .faq-question i {
    color: white;
    transform: rotate(180deg);
}

.faq-item.active .faq-answer {
    padding: var(--spacing-md);
    max-height: 1000px;
}
/* Contacts */
.contacts {
    background-color: #f8f9fa;
}

.contacts-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-item a {
    color: var(--primary-color);
    font-size: 1.2rem;
    text-decoration: none;
}
.contact-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: var(--transition);
}

.social-link:hover {
    color: var(--primary-dark);
}

.contact-form {
    display: grid;
    gap: var(--spacing-sm);
}

.contact-form input,
.contact-form textarea {
    padding: 0.8em;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    width: 100%;
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1001;
}

.modal-content {
    background-color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    max-width: 500px;
    margin: 10% auto;
    position: relative;
}
.modal-content h2 {
    margin-bottom: 20px;
    text-align: center;
}
.modal-content input,
textarea {
    padding: 12px 10px;
    border-radius: 8px;
    border: 1px solid #ddd;
}
.modal-content .btn {
    margin-top: 10px;
}
.close {
    position: absolute;
    right: 18px;
    top: 3px;
    font-size: 1.7rem;
    cursor: pointer;
}

#requestForm {
    display: grid;
    gap: 23px;
}

/* Footer */
.footer {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md) 0;
    text-align: center;
}
.footer .copy-dev a {
    margin-top: 20px;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}
.footer .copy-dev a img {
    margin-left: 10px;
}
.to-top {
    position: fixed;
    bottom: 40px;
    right: 75px;
    width: 40px;
    height: 40px;
    background-color: var(--background-color);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 999;
}

.to-top.show {
    opacity: 1;
    pointer-events: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 58px;
        left: 0;
        right: 0;
        /* bottom: 0; */
        background: white;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        padding: var(--spacing-md);
        z-index: 1001;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .nav-links.active {
        display: flex;
        opacity: 1;
        visibility: visible;
        animation: fadeInDown 0.3s ease forwards;
    }

    @keyframes fadeInDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }

    .nav-links.active li {
        opacity: 1;
        transform: translateY(0);
    }

    .nav-links li:nth-child(1) {
        transition-delay: 0.1s;
    }
    .nav-links li:nth-child(2) {
        transition-delay: 0.2s;
    }
    .nav-links li:nth-child(3) {
        transition-delay: 0.3s;
    }
    .nav-links li:nth-child(4) {
        transition-delay: 0.4s;
    }

    .nav-links a {
        display: block;
        padding: var(--spacing-sm) 0;
        font-size: 1.5rem;
        font-weight: 500;
    }

    .contacts-grid {
        grid-template-columns: 1fr;
    }
    .hero {
        margin-top: 75px;
    }
    .hero h1 {
        font-size: 2rem;
    }

    .hero h2 {
        font-size: 1.2rem;
    }

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

    .modal-content {
        margin: 20% 1rem;
    }

    .equipment-items {
        grid-template-columns: 1fr;
    }
    .to-top {
        bottom: 20px;
        right: 20px;
    }
    .swiper {
        width: 100%;
        height: 400px;
    }

}