:root {
    --primary-color: #000000;
    --secondary-color: #ffffff;
    --accent-color: #f8f9fa;
    --text-color: #212529;
    --text-light: #6c757d;
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    overflow-x: hidden;
    padding-top: 56px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
}

.display-3 {
    font-size: calc(1.525rem + 3.3vw);
}

.lead {
    font-size: 1.25rem;
    font-weight: 300;
}

.navbar {
    transition: all 0.3s ease;
    padding: 15px 0;
}

.navbar.scrolled {
    padding: 10px 0;
    background-color: rgba(0, 0, 0, 0.9) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.navbar-dark .navbar-nav .nav-link {
    color: var(--secondary-color);
    padding: 8px 15px;
    transition: all 0.3s ease;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: rgba(255, 255, 255, 0.8);
}

.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/koncepcia-tehnologii-energosberezenia-v-energeticeskoi-sisteme-turbine-green-energy.webp') no-repeat center center;
    background-size: cover;
    color: var(--secondary-color);
    position: relative;
}

.hero-scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 1.5rem;
}

.about-features .feature-item {
    border-left: 3px solid var(--primary-color);
    padding-left: 15px;
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1) !important;
}

.sustainability-stats .stat-number {
    color: var(--secondary-color);
}

.sustainability-stats .stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

.testimonial-avatar img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.contact-form {
    border-radius: 8px;
}

a {
    text-decoration: none;
}

.info-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: var(--secondary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer {
    background-color: var(--primary-color);
    color: var(--secondary-color);
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--secondary-color);
    color: var(--primary-color) !important;
}

.cookie-banner {
    z-index: 9999;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.privacy-policy,
.cookie-policy,
.terms-conditions {
    background-color: var(--accent-color);
}

.policy-content h2,
.terms-content h2 {
    color: var(--primary-color);
    padding-top: 20px;
    margin-top: -20px;
}

[data-animation] {
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-animation].animate {
    opacity: 1;
}

.animate__fadeInUp.animate {
    transform: translateY(0);
}

.animate__fadeInUp {
    transform: translateY(20px);
}

.animate__fadeInLeft.animate {
    transform: translateX(0);
}

.animate__fadeInLeft {
    transform: translateX(-20px);
}

.animate__fadeInRight.animate {
    transform: translateX(0);
}

.animate__fadeInRight {
    transform: translateX(20px);
}

.animate__fadeInDown.animate {
    transform: translateY(0);
}

.animate__fadeInDown {
    transform: translateY(-20px);
}

@media (max-width: 991.98px) {
    .hero-section {
        text-align: center;
    }

    .hero-section .btn {
        display: block;
        width: 100%;
        margin-bottom: 15px;
    }

    .hero-section .btn:last-child {
        margin-bottom: 0;
    }
}

@media (max-width: 767.98px) {
    body {
        padding-top: 56px;
    }

    .display-3 {
        font-size: 2.5rem;
    }

    .lead {
        font-size: 1.1rem;
    }
}