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

:root {
    --color-primary: #3c3c3b;
    --color-primary-dark: #2a272eff;
    --color-secondary: #10b981;
    --color-text: #2a272eff;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-border: #e5e7eb;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --spacing-unit: 8px;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-primary-dark);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

.nav {
    background-color: var(--color-bg);
    box-shadow: 0 2px 4px var(--color-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: calc(var(--spacing-unit) * 2) 0;
}

.nav__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav__logo img {
    width: 200px;
    height: 60px;
}

.nav__language {
    display: flex;
    gap: calc(var(--spacing-unit) * 1);
}

.nav__lang-btn {
    padding: calc(var(--spacing-unit) * 1) calc(var(--spacing-unit) * 2);
    border: 2px solid var(--color-border);
    border-radius: 4px;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
}

.nav__lang-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.nav__lang-btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.nav__lang-btn--active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

.nav__lang-btn--active:hover {
    color: #ffffff;
}

.hero {
    background: linear-gradient(135deg, #121522 0%, #3c3c3b 100%);
    color: white;
    padding: calc(var(--spacing-unit) * 15) 0;
    text-align: center;
}

.hero__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.hero__title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.hero__subtitle {
    font-size: 1.25rem;
    line-height: 1.5;
    margin-bottom: calc(var(--spacing-unit) * 4);
    opacity: 0.95;
}

.hero__cta {
    display: inline-block;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
    background-color: white;
    color: var(--color-primary);
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 6px var(--color-shadow);
}

.hero__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--color-shadow);
    color: var(--color-primary-dark);
}

.hero__cta:focus {
    outline: 3px solid white;
    outline-offset: 4px;
}

.about {
    padding: calc(var(--spacing-unit) * 10) 0;
    background-color: var(--color-bg);
}

.about__container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
    text-align: center;
}

.about__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 4);
    color: var(--color-text);
}

.about__text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

.offer {
    padding: calc(var(--spacing-unit) * 10) 0;
    background-color: var(--color-bg-alt);
}

.offer__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.offer__title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
    color: var(--color-text);
}

.offer__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: calc(var(--spacing-unit) * 3);
}


.offer__card {
    background-color: var(--color-bg);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 2px 4px var(--color-shadow);
}

.offer__card--4, .offer__card--5, .offer__card--6 {
    grid-row-start: 2;
}

.offer__card--7 {
    grid-column-start: 2;
    grid-row-start: 3;
}
.offer__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--color-shadow);
}

.offer__card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.4;
}

.offer__icon {
    display: inline-block;
    width: 96px;
    height: 96px;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.offer__icon--1 {
    background: url('ico-1.png');
    background-size: 96px 96px;
}
.offer__icon--2 {
    background: url('ico-2.png');
    background-size: 96px 96px;
}
.offer__icon--3 {
    background: url('ico-3.png');
    background-size: 96px 96px;
}
.offer__icon--4 {
    background: url('ico-4.png');
    background-size: 96px 96px;
}
.offer__icon--5 {
    background: url('ico-5.png');
    background-size: 96px 96px;
}
.offer__icon--6 {
    background: url('ico-6.png');
    background-size: 96px 96px;
}
.offer__icon--7 {
    background: url('ico-7.png');
    background-size: 96px 96px;
}

.why {
    padding: calc(var(--spacing-unit) * 10) 0;
    background-color: var(--color-bg);
}

.why__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.why__title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
    color: var(--color-text);
}

.why__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
}

.why__card {
    background-color: var(--color-bg-alt);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid var(--color-border);
}

.why__card:hover {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}


.why__icon {
    display: inline-block;
    width: 96px;
    height: 96px;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.why__icon--8 {
    background: url('ico-8.png');
    background-size: 96px 96px;
}
.why__icon--9 {
    background: url('ico-9.png');
    background-size: 96px 96px;
}
.why__icon--0 {
    background: url('ico-0.png');
    background-size: 96px 96px;
}

.why__card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--color-text);
    line-height: 1.3;
}

.contact {
    padding: calc(var(--spacing-unit) * 10) 0;
    background-color: var(--color-bg-alt);
}

.contact__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.contact__title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: calc(var(--spacing-unit) * 6);
    color: var(--color-text);
}

.contact__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 6);
}

.contact__info {
    background-color: var(--color-bg);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: 12px;
    box-shadow: 0 2px 4px var(--color-shadow);
}

.contact__subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 3);
    color: var(--color-text);
}

.contact__address {
    font-style: normal;
    line-height: 1.8;
    color: var(--color-text-light);
}

.contact__address p {
    margin-bottom: calc(var(--spacing-unit) * 1);
}

.contact__form-wrapper {
    background-color: var(--color-bg);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: 12px;
    box-shadow: 0 2px 4px var(--color-shadow);
}

.contact__form-group {
    margin-bottom: calc(var(--spacing-unit) * 3);
}

.contact__label {
    display: block;
    margin-bottom: calc(var(--spacing-unit) * 1);
    font-weight: 500;
    color: var(--color-text);
}

.contact__input,
.contact__textarea {
    width: 100%;
    padding: calc(var(--spacing-unit) * 1.5);
    border: 2px solid var(--color-border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--color-bg);
    color: var(--color-text);
}

.contact__input:focus,
.contact__textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.contact__textarea {
    resize: vertical;
    min-height: 120px;
}

.contact__submit {
    width: 100%;
    padding: calc(var(--spacing-unit) * 2);
    background-color: var(--color-primary);
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: 6px;
    transition: var(--transition);
    box-shadow: 0 2px 4px var(--color-shadow);
}

.contact__submit:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--color-shadow);
}

.contact__submit:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.contact__submit:active {
    transform: translateY(0);
}

.footer {
    background-color: var(--color-text);
    color: white;
    padding: calc(var(--spacing-unit) * 4) 0;
    text-align: center;
}

.footer__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.footer__text {
    opacity: 0.9;
}

@media (max-width: 768px) {
    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .about__title,
    .offer__title,
    .why__title,
    .contact__title {
        font-size: 2rem;
    }

    .nav__container {
        flex-direction: column;
        gap: calc(var(--spacing-unit) * 2);
    }


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

    .contact__grid {
        grid-template-columns: 1fr;
    }
    .offer__grid {
        display: block;
    }

    .offer__card {
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: calc(var(--spacing-unit) * 8) 0;
    }

    .hero__title {
        font-size: 1.75rem;
    }

    .hero__subtitle {
        font-size: 0.95rem;
    }

    .nav__logo img {
        width: 160px;
        height: 48px;
    }

    .about__title,
    .offer__title,
    .why__title,
    .contact__title {
        font-size: 1.75rem;
    }

    .offer__grid {
        display: block;
    }

    .offer__card {
        margin-bottom: 10px;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}