:root {
    --color-blue: #2275ff;
    --color-blue-dark: #1553c8;
    --color-blue-light: #e8f1ff;
    --color-blue-border: #d5e3ff;

    --color-red: #ff3b4f;
    --color-red-dark: #d6283f;

    --color-bg: #ffffff;
    --color-bg-alt: #f7f8fb;

    --color-text: #1f2933;
    --color-text-muted: #6b7280;

    --radius: 14px;
    --shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Fira Sans", sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
}

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

.container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 15px 22px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    transition: 0.2s;
}

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

.btn--primary:hover {
    background: var(--color-red-dark);
    box-shadow: 0 8px 20px rgba(255, 59, 79, 0.3);
    transform: translateY(-2px);
}

.section {
    margin-top: 40px;
}

.section__title {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 24px;
    line-height: 1.3;
}

.section__text {
    font-size: 16px;
    color: var(--color-text-muted);
    line-height: 1.3;
    padding-left: 30px;
}

.section__text li {
    margin-bottom: 8px;
}


.nav {
    background: #ffffff;
    border-bottom: 1px solid #e5e7eb;
}

.nav__descr {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.nav__title {
    font-size: 16px;
    font-weight: 600;
}

.nav__inner {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    flex-wrap: wrap;
    gap: 16px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav__logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, #2b7cff, #53a0ff);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 800;
}

.nav__contacts {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.nav__contact {
    display: flex;
    flex-direction: row;
    gap: 10px;
}


.hero {
    padding: 10px 0 30px;
}

.hero__left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.hero__logo {
    width: 80px;
    height: 80px;
}

.hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(300px, 1.2fr);
    gap: 24px;
}

.hero__title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 8px;
}

.hero__subtitle {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.hero__note {
    font-size: 13px;
    color: #9ca3af;
}


.info-card {
    padding: 18px;
    border-radius: var(--radius);
    background: var(--color-blue);
    color: #ffffff;
    box-shadow: var(--shadow);
}

.info-card__title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.info-card__list {
    font-size: 16px;
    margin-bottom: 21px;
}

.side-links {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.side-links__item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: var(--radius);
    padding: 12px;
    font-size: 14px;
}

.side-links__icon {
    font-size: 20px;
    color: var(--color-blue-dark);
}

.audience__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.audience__card {
    padding: 24px 16px;
    border: 1px solid var(--color-blue-border);
    border-radius: var(--radius);
    background: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.audience__icon {
    font-size: 20px;
    color: var(--color-blue);
}


.features__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.features__item {
    display: flex;
    gap: 10px;
    font-size: 14px;
    margin-bottom: 8px;
    align-items: center;
}

.features__icon {
    font-size: 24px;
    color: var(--color-blue-dark);
}

.stack__group {
    margin-bottom: 32px;
    padding: 20px;
    border: 1px solid var(--color-blue-border);
    border-radius: var(--radius);
    background: var(--color-bg-alt);
}

.stack__subtitle {
    font-size: 18px;
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-blue-dark);
}

.stack__list {
    margin: 0;
    padding-left: 20px;
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.stack__list li {
    margin-bottom: 6px;
}

.docs__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.docs__grid-item {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 30px;
    border: 1px solid var(--color-text-muted);
    border-radius: 15px;
}


.docs__content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.docs__logo {
    color: var(--color-bg);
    background-color: var(--color-blue);
    padding: 15px;
    border-radius: 999px;
    width: max-content;
    height: max-content;
}

.docs__descr {
    font-size: 21px;
    margin: 30px 0;
}

.docs__descr span {
    font-size: 12px;
    color: var(--color-text-muted);
}

.docs__btn {
    background: var(--color-blue);
    color: #ffffff;
}


.docs__btn:hover {
    background: var(--color-blue-dark);
    box-shadow: 0 8px 20px rgba(45, 2, 161, 0.3);
    transform: translateY(-2px);
}


.footer {
    padding: 60px 0 30px;
}

.footer-inner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 40px;
}

.footer-logo {
    width: 100px;
    margin-bottom: 12px;
}

.footer-logo-block p {
    color: #95A4B4;
    font-size: 14px;
    margin-top: 6px;
}

.footer-block h4 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--color-text);
}

.footer-block p,
.footer-block a {
    color: var(--color-text-muted);
    margin: 4px 0;
    text-decoration: none;
    font-size: 15px;
}

.footer-block a:hover {
    color: var(--color-text);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
}

.footer-bottom p {
    color: #95A4B4;
    font-size: 14px;
    margin: 0;
}



@media (max-width: 1200px) {
    .container {
        max-width: 960px;
    }
}

@media (max-width: 992px) {

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

    .hero__left {
        flex-direction: column;
    }

    .hero__logo {
        width: 70px;
        height: 70px;
    }

    .info-card {
        max-width: 380px;
        margin: 0 auto;
    }

    .nav__menu {
        gap: 12px;
        flex-wrap: wrap;
        justify-content: center;
    }

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

@media (max-width: 768px) {

    .audience__grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .audience__card {
        justify-content: center;
        text-align: center;
    }

    .section {
        margin-top: 32px;
    }

    .hero__title {
        font-size: 32px;
    }

    .hero__subtitle {
        font-size: 14px;
    }

    .features__item {
        font-size: 14px;
        padding-left: 4px;
    }

    .section__text {
        padding-left: 16px;
        font-size: 15px;
    }
}

@media (max-width: 576px) {

    .nav__logo {
        display: flex;
        align-items: center;
    }

    .nav__inner {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .nav__menu {
        flex-wrap: wrap;
        gap: 10px;
    }

    .hero__title {
        font-size: 26px;
    }

    .hero__logo {
        width: 60px;
        height: 60px;
    }

    .btn {
        width: 100%;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-logo {
        margin: 0 auto 12px;
    }

    .footer-bottom {
        padding-top: 15px;
    }

      .stack__group {
        padding: 16px;
    }

    .stack__subtitle {
        font-size: 16px;
    }

    .stack__list {
        font-size: 14px;
        padding-left: 16px;
    }
}