:root {
    --bg: #f5f7fa;
    --text: #1a1a1a;
    --accent: #FF5733;
    --accent-secondary: #7B2CBF;
    --header-bg: #ffffff;
    --footer-bg: #1a1a1a;
    --card-bg: #ffffff;
    --overlay: rgba(255, 255, 255, 0.95);
    --dark-bg: #121212;
    --dark-text: #e0e0e0;
    --dark-card: #1e1e1e;
    --icon-color: var(--text);
}

body.dark {
    --bg: var(--dark-bg);
    --text: var(--dark-text);
    --card-bg: var(--dark-card);
    --header-bg: #1a1a1a;
    --overlay: rgba(0, 0, 0, 0.85);
    --icon-color: var(--dark-text);
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: all 0.4s ease;
    line-height: 1.6;
}

a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.3s;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

@keyframes overlayFade {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--header-bg);
    padding: 1.2rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.5s ease-out;
}

.logo {
    font-family: 'Inter', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 4px;
    letter-spacing: 1.5px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.15);
}

.logo-pro {
    color: #ff6600;
    font-weight: 900;
}

.logo-it {
    color: #9c80f7;
    font-weight: 900;
}

.top-controls {
    display: flex;
    gap: 1.2rem;
    align-items: center;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--icon-color);
    transition: transform 0.3s;
}

.theme-toggle:hover {
    animation: pulse 0.5s;
}

.lang-dropdown {
    position: relative;
}

.lang-current {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    color: #fff;
    border: none;
    padding: 0.6rem 1.2rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.3s;
}

.lang-current:hover {
    animation: pulse 0.5s;
}

.lang-options {
    position: absolute;
    top: 110%;
    right: 0;
    display: none;
    flex-direction: column;
    background: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 1001;
}

.lang-btn {
    border: none;
    padding: 0.7rem 1.2rem;
    font-weight: 600;
    cursor: pointer;
    background: none;
    color: var(--text);
    transition: background 0.3s;
}

.lang-btn:hover {
    background: var(--accent);
    color: #fff;
}

.hero {
    position: relative;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    padding: 8rem 2rem 5rem;
    text-align: center;
    overflow: hidden;
}

.hero-inner {
    max-width: 900px;
    margin: 0 auto;
    z-index: 1;
    position: relative;
    animation: fadeIn 0.8s ease-out;
}

.hero-title {
    font-size: 3.2rem;
    margin-bottom: 1rem;
    color: #ffffff;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.hero-desc {
    font-size: 1.3rem;
    font-weight: 400;
    max-width: 600px;
    margin: 1.5rem auto;
    padding: 1rem 1.5rem;
    background: var(--overlay);
    border-radius: 12px;
    color: #1a1a1a;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    display: block;
}

body.dark .hero-desc {
    background: rgba(0, 0, 0, 0.8);
    color: #f0f0f0;
}

.slogan {
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    text-transform: uppercase;
    color: #ffffff;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
}

.wave-bg {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 120px;
    background: var(--bg);
    border-top-left-radius: 50% 100%;
    border-top-right-radius: 50% 100%;
    transition: background 0.4s ease;
}

.section {
    padding: 5rem 1.5rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text);
    animation: fadeIn 0.8s ease-out;
}

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

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.4s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.8s ease-out;
    cursor: pointer;
}

.service-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, var(--card-bg), var(--accent) 150%);
}

.service-card i {
    font-size: 2.8rem;
    margin-bottom: 1.2rem;
    color: var(--icon-color);
    transition: transform 0.3s;
}

.service-card:hover i {
    transform: scale(1.1);
}

.service-card h3 {
    margin-bottom: 0.6rem;
    font-size: 1.4rem;
    color: var(--text);
}

.service-card p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text);
}

.expand-content {
    display: none;
}

.service-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    animation: overlayFade 0.3s ease-out;
}

.service-overlay.active {
    display: flex;
}

.overlay-content {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.3s ease-out;
}

.overlay-content ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    color: var(--text);
}

.overlay-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
}

.overlay-close:hover {
    background: var(--accent-secondary);
}

.portfolio {
    background: var(--bg);
}

.partners-carousel-container {
    width: 100%;
    overflow: hidden;
    max-width: 960px;
    margin: 0 auto;
    padding-top: 20px;
}

.partners-carousel-track {
    display: flex;
    gap: 1rem;
    transition: transform 0.5s ease-in-out;
    will-change: transform;
}

.partner-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.partner-card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.partner-card img {
    width: 100%;
    height: auto;
    max-width: 200px;
    object-fit: contain;
    border-radius: 8px;
}

.contacts {
    background: var(--header-bg);
}

.contact-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
    justify-content: center;
}

.contact-card {
    background: var(--card-bg);
    color: var(--text);
    padding: 1.2rem 2rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.4s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.contact-card:hover {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    color: #fff;
}

.contact-card i {
    font-size: 1.8rem;
    color: var(--icon-color);
    transition: transform 0.3s;
}

.contact-card:hover i {
    transform: scale(1.2);
    color: #fff;
}

.footer {
    background: var(--footer-bg);
    color: var(--dark-text);
    text-align: center;
    padding: 2rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    border-top: 1px solid #333;
}

@media (max-width: 768px) {
    .hero {
        padding: 5rem 1.5rem 3rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-desc {
        font-size: 1.1rem;
        max-width: 500px;
        padding: 0.8rem 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .service-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .partners-carousel-track {
        flex-wrap: nowrap;
    }

    .overlay-content {
        width: 95%;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .top-bar {
        padding: 1rem;
    }

    .logo {
        font-size: 2rem;
    }

    .top-controls {
        gap: 0.8rem;
    }

    .lang-current {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-desc {
        font-size: 1rem;
        max-width: 300px;
        padding: 0.6rem 0.8rem;
    }

    .partners-carousel-track {
        flex-wrap: nowrap;
    }
}
.top-bar {
    height: 120px;
    /* фиксированная высота панели */
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--header-bg);
    padding: 0 2rem;
    /* убираем лишний отступ сверху/снизу */
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.logo-img {
    height: 100%;
    /* логотип занимает всю высоту панели */
    max-height: 150px;
    width: auto;
}
.logo-img {
    height: 60px;
    /* стандартный размер на ПК */
    width: auto;
}

@media (max-width: 768px) {
    .logo-img {
        height: 40px;
        /* планшеты */
    }
}

@media (max-width: 480px) {
    .logo-img {
        height: 30px;
        /* телефоны */
    }
}