/* CSS Variables for consistent theming */
:root {
    --primary-color: #0D1B1E; /* Кибер-лесной тёмно-зелёный */
    --secondary-color: #1A2B2F; /* Градиентный фон */
    --accent-color: #28A745; /* Зелёный акцент */
    --highlight-color: #007BFF; /* Голубой акцент */
    --text-color: #FFFFFF; /* Белый текст */
    --error-color: #DC3545; /* Красный для кнопки удаления */
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--primary-color);
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header and Navigation */
.navbar {
    background-color: var(--primary-color);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo a {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--highlight-color);
    text-decoration: none;
}

.logo i {
    margin-right: 0.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: clamp(1rem, 2vw, 2rem);
}

.nav-link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    transition: color 0.3s ease, transform 0.3s ease;
}

.nav-link:hover, .nav-link:focus {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.nav-link:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

.cart-icon {
    position: relative;
}

.cart-icon i {
    font-size: clamp(1rem, 2vw, 1.2rem);
}

.nav-toggle {
    display: none;
    font-size: clamp(1.2rem, 3vw, 1.5rem);
    cursor: pointer;
    color: var(--text-color);
    transition: transform 0.3s ease;
}

.nav-toggle:hover {
    transform: rotate(90deg);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    text-align: center;
    padding: clamp(2rem, 5vw, 4rem) 1rem;
    position: relative;
}

.hero-image {
    position: relative;
    width: 100%;
    height: clamp(200px, 40vw, 400px);
    overflow: hidden;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(70%);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 2rem 0;
}

.hero-content h1 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-color);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

.hero-content p {
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    color: var(--text-color);
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    padding: clamp(0.8rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2rem);
    background-color: var(--accent-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: clamp(0.9rem, 2vw, 1rem);
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.cta-button:hover {
    background-color: #218838;
    transform: scale(1.05);
}

.cta-button:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

/* Services and Products Sections */
.services, .products {
    padding: clamp(2rem, 5vw, 4rem) 0;
    background-color: var(--primary-color);
}

.services h2, .products h2 {
    text-align: center;
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    margin-bottom: 3rem;
    color: var(--text-color);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: clamp(1rem, 2vw, 2rem);
}

.service-card {
    background-color: var(--secondary-color);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    backdrop-filter: blur(5px);
    background: rgba(26, 43, 47, 0.8); /* Glassmorphism */
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

.service-img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.service-card i {
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--highlight-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    margin-bottom: 0.8rem;
    color: var(--text-color);
}

.service-card p {
    color: var(--text-color);
    font-size: clamp(0.9rem, 2vw, 1rem);
    margin-bottom: 1.5rem;
}

.service-button {
    display: inline-block;
    padding: clamp(0.6rem, 1.5vw, 0.8rem) clamp(1rem, 2vw, 1.5rem);
    background-color: var(--accent-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: clamp(0.8rem, 1.8vw, 0.9rem);
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.service-button:hover {
    background-color: #218838;
    transform: scale(1.05);
}

.service-button:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

/* About Section */
.about {
    padding: clamp(2rem, 5vw, 4rem) 0;
    background-color: var(--primary-color);
}

.about h2 {
    text-align: center;
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    margin-bottom: 2rem;
    color: var(--text-color);
}

.about p {
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    color: var(--text-color);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    text-align: center;
    background: rgba(26, 43, 47, 0.8);
    padding: 2rem;
    border-radius: 12px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.contact-info h3 {
    font-size: clamp(1.3rem, 2.5vw, 1.5rem);
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.contact-info p {
    font-size: clamp(0.9rem, 2vw, 1rem);
    color: var(--text-color);
    margin-bottom: 1rem;
}

.contact-info i {
    margin-right: 0.5rem;
    color: var(--highlight-color);
}

/* Contact Section */
.contact {
    padding: clamp(2rem, 5vw, 4rem) 0;
    background-color: var(--primary-color);
}

.contact h2 {
    text-align: center;
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    margin-bottom: 2rem;
    color: var(--text-color);
}

#contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: clamp(0.8rem, 2vw, 1rem);
    border: 1px solid var(--text-color);
    border-radius: 8px;
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-family: 'Roboto', sans-serif;
    background-color: rgba(26, 43, 47, 0.8);
    color: var(--text-color);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--highlight-color);
    box-shadow: 0 0 8px rgba(0, 123, 255, 0.3);
    outline: none;
}

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

button[type="submit"] {
    display: block;
    width: 100%;
    padding: clamp(0.8rem, 2vw, 1rem);
    background-color: var(--accent-color);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

button[type="submit"]:hover {
    background-color: #218838;
    transform: scale(1.05);
}

button[type="submit"]:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

/* Cart Section */
.cart-section {
    padding: clamp(2rem, 5vw, 4rem) 0;
    background-color: var(--primary-color);
}

.cart-section h1 {
    text-align: center;
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    margin-bottom: 2rem;
    color: var(--text-color);
}

.cart-items {
    max-width: 800px;
    margin: 0 auto;
}

.cart-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background-color: var(--secondary-color);
    border-radius: 12px;
    margin-bottom: 1rem;
    transition: box-shadow 0.3s ease;
}

.cart-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.cart-item-img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    margin-right: 1rem;
}

.cart-item-details {
    flex: 1;
}

.cart-item h3 {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-color);
}

.cart-item p {
    font-size: clamp(0.9rem, 1.8vw, 1rem);
    color: var(--text-color);
}

.remove-item {
    padding: clamp(0.5rem, 1vw, 0.6rem) clamp(1rem, 2vw, 1.2rem);
    background-color: var(--error-color);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.remove-item:hover {
    background-color: #C82333;
    transform: scale(1.05);
}

.remove-item:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

.cart-total {
    text-align: right;
    margin-top: 2rem;
}

.cart-total h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    color: var(--text-color);
    margin-bottom: 1rem;
}

.checkout-button {
    padding: clamp(0.8rem, 2vw, 1rem) clamp(1.5rem, 3vw, 2rem);
    background-color: var(--accent-color);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    font-size: clamp(0.9rem, 2vw, 1rem);
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.checkout-button:hover {
    background-color: #218838;
    transform: scale(1.05);
}

.checkout-button:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

.continue-shopping {
    display: block;
    text-align: center;
    margin-top: 2rem;
    color: var(--highlight-color);
    text-decoration: none;
    font-weight: 500;
    font-size: clamp(0.9rem, 2vw, 1rem);
}

.continue-shopping:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--text-color);
    text-align: center;
    padding: 2rem 0;
}

.footer-links {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: clamp(0.8rem, 2vw, 1rem);
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: clamp(0.8rem, 1.8vw, 0.9rem);
    transition: color 0.3s ease;
}

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

.footer-links a:focus {
    outline: 2px solid var(--highlight-color);
    outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 480px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--primary-color);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero-image {
        height: 200px;
    }

    .hero-content h1 {
        font-size: clamp(1.5rem, 4vw, 2rem);
    }

    .hero-content p {
        font-size: clamp(0.8rem, 2vw, 1rem);
    }

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

    .service-card {
        margin-bottom: 1rem;
    }

    .contact-info {
        padding: 1rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .cart-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .cart-item-img {
        width: 60px;
        height: 60px;
    }

    .cart-total {
        text-align: center;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .nav-menu {
        display: flex;
        gap: 1rem;
    }

    .nav-toggle {
        display: none;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-image {
        height: 300px;
    }
}

@media (min-width: 769px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.service-card, .hero-content, .contact-info {
    animation: fadeInUp 0.6s ease-out;
}