:root {
    --gradient-start: #2b6199;
    --gradient-mid: #284f80;
    --gradient-end: #224d7a;
    --text-color: #12242b;
    --muted-text: #4c5c62;
    --background: #f3f8f9;
    --white: #ffffff;
    --border: rgba(65, 118, 134, 0.12);
    --shadow: 0 18px 36px rgba(24, 52, 64, 0.12);
    --shadow-soft: 0 12px 24px rgba(24, 52, 64, 0.08);
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 16px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Inter", "Roboto", "Montserrat", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--background);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
    border-radius: 20px;
}

a {
    color: inherit;
    text-decoration: none;
}

p {
    margin-top: 0;
    color: var(--muted-text);
}

h1, h2, h3 {
    margin-top: 0;
    color: var(--text-color);
    font-weight: 700;
    line-height: 1.2;
}

.container {
    width: min(1120px, calc(100% - 48px));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background-color: rgba(243, 248, 249, 0.95);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 30px rgba(18, 36, 43, 0.06);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1px 0;
    gap: 24px;
}

.header-cta {
    flex-shrink: 0;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 60px;
    color: var(--text-color);
}

.logo-wordmark {
    height: 70px;
    width: auto;
    display: block;
    border-radius: 0;
}

.logo-icon {
    display: none;
    width: 70px;
    height: auto;
    border-radius: 0;
}

.main-nav ul,
.mobile-nav ul {
    list-style: none;
    display: flex;
    gap: 24px;
    margin: 0;
    padding: 0;
}

.main-nav a {
    font-weight: 500;
    font-size: 1.20rem;
    position: relative;
    padding-bottom: 6px;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
    transform: scaleX(1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 12px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
    text-align: center;
    gap: 8px;
}

.btn.primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--white);
    box-shadow: var(--shadow-soft);
}

/* Hero primary button (Подробнее о нас) - white background, colored text */
.hero .btn.primary {
    background: var(--white);
    color: #224d7a;
}

.btn.primary:hover,
.btn.primary:focus-visible {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn.ghost {
    background-color: rgba(255, 255, 255, 0.28);
    color: var(--text-color);
    border: 1px solid rgba(255, 255, 255, 0.45);
}

.btn.ghost:hover,
.btn.ghost:focus-visible {
    background-color: rgba(255, 255, 255, 0.45);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    cursor: pointer;
    align-items: center;
    justify-content: center;
    gap: 5px;
    flex-direction: column;
    transition: var(--transition);
}

.nav-toggle .bar {
    width: 22px;
    height: 2px;
    background-color: var(--white);
    border-radius: 1px;
}

.mobile-nav {
    display: none;
    padding: 0 24px 24px;
}

.mobile-nav.open {
    display: block;
}

.mobile-nav ul {
    flex-direction: column;
    gap: 16px;
}

.mobile-nav a {
    display: inline-flex;
    padding: 12px 0;
    font-weight: 600;
    font-size: 1.00rem;
}

.hero {
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    padding: 120px 0;
}

.hero-content {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 48px;
    align-items: center;
}

.hero h1 {
    font-size: clamp(2.2rem, 3vw + 1rem, 3.2rem);
    margin-bottom: 16px;
    color: var(--white);
}

.hero p {
    color: rgba(255, 255, 255, 0.88);
    font-size: 1.05rem;
    max-width: 480px;
}

.hero-actions {
    margin-top: 32px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: var(--shadow);
}

section {
    padding-block: 100px;
}

.section-header {
    max-width: 720px;
    margin-inline: auto;
    text-align: center;
}

.eyebrow {
    display: inline-block;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gradient-start);
    margin-bottom: 12px;
}

.about .features {
    margin-top: 64px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--white);
    padding: 32px;
    border-radius: 24px;
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), box-shadow var(--transition);
}

.feature-card:hover,
.feature-card:focus-within {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

.icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    background: rgba(99, 153, 145, 0.12);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.icon-wrap svg {
    width: 34px;
    height: 34px;
}

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

.product-grid {
    display: grid;
    gap: 48px;
    margin-top: 64px;
}

.product-card {
    background-color: var(--background);
    border-radius: 28px;
    overflow: hidden;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: stretch;
    box-shadow: var(--shadow-soft);
}

.product-card.reverse {
    direction: rtl;
}

.product-card.reverse .product-content {
    direction: ltr;
}

.product-media img {
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.product-content {
    padding: 40px;
}

.product-content ul {
    margin: 24px 0 0;
    padding-left: 20px;
    color: var(--muted-text);
}

.cta {
    background: linear-gradient(115deg, rgba(65, 118, 134, 0.92), rgba(163, 223, 242, 0.85)), url("assets/cta-pattern.svg") center/cover;
    color: var(--white);
    position: relative;
}

.cta::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    z-index: 0;
}

.cta .container {
    position: relative;
    z-index: 1;
}

.cta-content {
    display: grid;
    gap: 48px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.cta-text h2,
.cta-text p {
    color: var(--white);
}

.contact-form {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    border-radius: 28px;
    padding: 32px;
    box-shadow: var(--shadow-soft);
    color: var(--white);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.form-grid .full {
    grid-column: span 2;
}

label {
    display: grid;
    gap: 8px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
}

input,
textarea {
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.4);
    padding: 12px 14px;
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--white);
    font: inherit;
    outline: none;
    transition: border var(--transition), box-shadow var(--transition), background-color var(--transition);
}

input::placeholder,
textarea::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

input:focus,
textarea:focus {
    border-color: var(--gradient-end);
    background-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 0 3px rgba(163, 223, 242, 0.35);
}

.contact-form .btn {
    margin-top: 12px;
}

.form-notice {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.form-response {
    min-height: 22px;
    font-weight: 500;
    margin-top: 8px;
}

.contacts {
    background-color: var(--background);
}

.contacts-content {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 48px;
}

.contact-list {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    display: grid;
    gap: 12px;
}

.contact-list span {
    font-weight: 600;
    margin-right: 6px;
}

.contacts-card {
    background-color: var(--white);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow-soft);
}

.socials {
    display: flex;
    gap: 16px;
    margin-top: 20px;
}

.socials a {
    width: 54px;
    height: 54px;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(99, 153, 145, 0.1);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.socials a:hover,
.socials a:focus-visible {
    transform: translateY(-4px);
    background-color: rgba(99, 153, 145, 0.24);
    box-shadow: var(--shadow-soft);
}

.socials svg {
    width: 28px;
    height: 28px;
}

.site-footer {
    padding: 32px 0;
    background-color: #0f1f25;
    color: rgba(255, 255, 255, 0.75);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.75);
    transition: color var(--transition);
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: var(--white);
}

[data-animate] {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1024px) {
    .header-content {
        gap: 16px;
    }

    .main-nav {
        display: none;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .header-cta {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero p {
        margin-inline: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .about .features {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .product-card {
        grid-template-columns: 1fr;
    }

    .product-card.reverse {
        direction: ltr;
    }

    .product-media img {
        height: 280px;
    }

    .cta-content {
        grid-template-columns: 1fr;
    }

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

    .form-grid .full {
        grid-column: auto;
    }

    .contacts-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 680px) {
    body {
        font-size: 0.95rem;
    }

    .container {
        width: min(100%, calc(100% - 32px));
    }

    section {
        padding-block: 72px;
    }

    .hero {
        padding: 50px 0;
    }

    .logo-icon {
        display: block;
        width: 100px;
        max-height: 70px;
        border-radius: 0;
    }

    .logo-wordmark {
        display: none;
        border-radius: 0;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .about .features {
        grid-template-columns: 1fr;
    }

    .product-content {
        padding: 28px;
    }

    .contact-form {
        padding: 24px;
    }

    .site-footer {
        text-align: center;
    }

    .footer-content {
        flex-direction: column;
    }
}