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

:root {
    --color-primary: #1a56db;
    --color-primary-dark: #1244af;
    --color-primary-light: #e8eefb;
    --color-dark: #111827;
    --color-text: #374151;
    --color-text-light: #6b7280;
    --color-bg: #ffffff;
    --color-bg-alt: #f9fafb;
    --color-border: #e5e7eb;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.04);
    --shadow-lg: 0 4px 12px rgba(0,0,0,.1), 0 12px 32px rgba(0,0,0,.06);
    --transition: .2s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-dark);
}

.logo__icon {
    width: 36px;
    height: 36px;
    color: var(--color-primary);
}

.logo__text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -.02em;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav__link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition);
}

.nav__link:hover {
    color: var(--color-primary);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-dark);
    border-radius: 2px;
    transition: var(--transition);
}

.burger--active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger--active span:nth-child(2) {
    opacity: 0;
}

.burger--active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero */
.hero {
    padding: 160px 0 100px;
    background-color: var(--color-dark);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(17,24,39,.88) 40%, rgba(26,86,219,.6) 100%);
}

.hero__inner {
    max-width: 720px;
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -.03em;
    color: #fff;
    margin-bottom: 20px;
}

.hero__text {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255,255,255,.8);
    margin-bottom: 36px;
    max-width: 600px;
}

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26,86,219,.3);
}

.btn--primary:disabled {
    background: var(--color-text-light);
    cursor: default;
    transform: none;
    box-shadow: none;
}

.btn--full {
    width: 100%;
}

/* Section Title */
.section__title {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -.02em;
    color: var(--color-dark);
    text-align: center;
    margin-bottom: 48px;
}

.section__title--left {
    text-align: left;
}

/* Services */
.services {
    padding: 96px 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--transition);
    overflow: hidden;
}

.card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card__img {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s ease;
}

.card:hover .card__img img {
    transform: scale(1.05);
}

.card__body {
    padding: 24px;
}

.card__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.card__text {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text-light);
}

/* About */
.about {
    padding: 96px 0;
    background: var(--color-bg-alt);
}

.about__content {
    max-width: 960px;
    margin: 0 auto;
}

.about__content p {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 16px;
    color: var(--color-text);
}

.about__legal {
    margin-top: 24px;
    padding: 20px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-light);
}

.about__legal p {
    margin-bottom: 8px;
    font-size: 14px;
}

.about__legal p:last-child {
    margin-bottom: 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 32px;
}

.tech-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.tech-card__header {
    padding: 12px 16px;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    background: var(--color-primary);
}

.tech-card__list {
    list-style: none;
    padding: 12px 16px;
}

.tech-card__list li {
    font-size: 13px;
    line-height: 1.5;
    color: var(--color-text);
    padding: 5px 0;
    border-bottom: 1px solid var(--color-border);
}

.tech-card__list li:last-child {
    border-bottom: none;
}

/* Process */
.process {
    padding: 96px 0;
}

.process__steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.step {
    text-align: center;
    padding: 24px 16px;
}

.step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.step__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.step__text {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text-light);
}

/* Contacts */
.contacts {
    padding: 96px 0;
    background: var(--color-bg-alt);
}

.contacts__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contacts__info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-item__icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    color: var(--color-primary);
    margin-top: 2px;
}

.contact-item__label {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--color-text-light);
    margin-bottom: 2px;
}

.contact-item__value {
    font-size: 16px;
    color: var(--color-dark);
    text-decoration: none;
}

.contact-item__value:hover {
    color: var(--color-primary);
}

/* Messengers */
.messengers {
    display: flex;
    gap: 10px;
    margin-top: 8px;
}

.messenger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    transition: transform var(--transition), opacity var(--transition);
}

.messenger svg {
    width: 20px;
    height: 20px;
}

.messenger:hover {
    transform: scale(1.15);
    opacity: .85;
}

.messenger--wa {
    background: #25d366;
    color: #fff;
}

.messenger--tg {
    background: #2aabee;
    color: #fff;
}

.messenger--max {
    background: linear-gradient(135deg, #667eea 0%, #f093fb 50%, #4facfe 100%);
    background-size: 200% 200%;
    animation: maxGradient 3s ease infinite;
    color: #fff;
}

@keyframes maxGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Form */
.form {
    background: var(--color-bg);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 20px;
}

.form__input {
    display: block;
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-dark);
    margin-bottom: 12px;
    transition: border-color var(--transition);
    outline: none;
}

.form__input:focus {
    border-color: var(--color-primary);
}

.form__textarea {
    resize: vertical;
    min-height: 100px;
}

.form .btn {
    margin-top: 4px;
}

/* Footer */
.footer {
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
}

.footer__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__copy {
    font-size: 14px;
    color: var(--color-text-light);
}

.footer__inn {
    font-size: 13px;
    color: var(--color-text-light);
}

/* Mobile */
@media (max-width: 768px) {
    .burger {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,.98);
        backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 24px;
        gap: 20px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-120%);
        transition: transform .3s ease;
    }

    .nav--open {
        transform: translateY(0);
    }

    .nav__link {
        font-size: 16px;
    }

    .hero {
        padding: 120px 0 64px;
    }

    .hero__title {
        font-size: 32px;
    }

    .hero__text {
        font-size: 16px;
    }

    .section__title {
        font-size: 26px;
        margin-bottom: 32px;
    }

    .services,
    .about,
    .process,
    .contacts {
        padding: 64px 0;
    }

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

    .process__steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .contacts__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .footer__inner {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 28px;
    }

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

    .card__img {
        height: 160px;
    }
}