:root {
    --color-ink: #172033;
    --color-muted: #667085;
    --color-surface: #ffffff;
    --color-soft: #f3f6fb;
    --color-brand: #5c3df5;
    --color-brand-dark: #3d27b8;
    --color-line: #dfe4ec;
    --shadow: 0 18px 45px rgb(23 32 51 / 8%);
    --radius: 0.8rem;
    --shell: 76rem;
}

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

html {
    color: var(--color-ink);
    background: var(--color-surface);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

body {
    min-height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--color-brand-dark);
}

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

.shell {
    width: min(100% - 2rem, var(--shell));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    z-index: 100;
    inset: 0 auto auto 1rem;
    padding: 0.75rem 1rem;
    color: #fff;
    background: var(--color-ink);
    transform: translateY(-120%);
}

.skip-link:focus {
    transform: translateY(1rem);
}

.site-header {
    position: relative;
    z-index: 10;
    border-bottom: 1px solid var(--color-line);
    background: rgb(255 255 255 / 94%);
    backdrop-filter: blur(12px);
}

.site-header__bar {
    min-height: 4.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-ink);
    font-size: 1.05rem;
    font-weight: 750;
    text-decoration: none;
}

.brand__mark {
    width: 2.35rem;
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border-radius: 0.65rem;
    color: #fff;
    background: linear-gradient(135deg, var(--color-brand), #8a6cff);
    box-shadow: 0 7px 18px rgb(92 61 245 / 26%);
    font-size: 0.8rem;
    letter-spacing: -0.03em;
}

.main-navigation__list,
.main-navigation__sublist,
.breadcrumb__list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.main-navigation__list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.main-navigation__item {
    position: relative;
}

.main-navigation__link,
.main-navigation__sublink {
    display: block;
    border-radius: 0.5rem;
    color: var(--color-muted);
    text-decoration: none;
}

.main-navigation__link {
    padding: 0.55rem 0.8rem;
}

.main-navigation__link:hover,
.main-navigation__link:focus-visible,
.main-navigation__item.is-active > .main-navigation__link {
    color: var(--color-brand-dark);
    background: var(--color-soft);
}

.main-navigation__sublist {
    position: absolute;
    top: calc(100% + 0.4rem);
    left: 0;
    width: max-content;
    min-width: 13rem;
    padding: 0.45rem;
    border: 1px solid var(--color-line);
    border-radius: 0.7rem;
    background: var(--color-surface);
    box-shadow: var(--shadow);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-0.35rem);
    transition: 150ms ease;
}

.main-navigation__item:hover .main-navigation__sublist,
.main-navigation__item:focus-within .main-navigation__sublist {
    visibility: visible;
    opacity: 1;
    transform: none;
}

.main-navigation__sublink {
    padding: 0.45rem 0.65rem;
}

.main-navigation__sublink:hover,
.main-navigation__sublink:focus-visible,
.main-navigation__sublink.is-active {
    color: var(--color-brand-dark);
    background: var(--color-soft);
}

.nav-toggle {
    display: none;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--color-line);
    border-radius: 0.55rem;
    color: var(--color-ink);
    background: var(--color-surface);
    font: inherit;
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
    width: 1.2rem;
    height: 2px;
    display: block;
    background: currentcolor;
}

.nav-toggle__icon {
    position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
    position: absolute;
    left: 0;
    content: "";
}

.nav-toggle__icon::before { top: -0.35rem; }
.nav-toggle__icon::after { top: 0.35rem; }

.site-main {
    flex: 1;
}

.page-heading {
    padding-block: clamp(3.5rem, 8vw, 7rem) clamp(2rem, 5vw, 4rem);
}

.page-heading h1 {
    max-width: 18ch;
    margin: 0;
    font-size: clamp(2.4rem, 6vw, 5rem);
    line-height: 1.03;
    letter-spacing: -0.045em;
}

.page-heading__lead {
    max-width: 42rem;
    margin: 1.25rem 0 0;
    color: var(--color-muted);
    font-size: clamp(1.1rem, 2vw, 1.35rem);
}

.breadcrumb {
    margin-bottom: 1.25rem;
    color: var(--color-muted);
    font-size: 0.9rem;
}

.breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.breadcrumb__item:not(:last-child)::after {
    margin-left: 0.45rem;
    color: #a4acb9;
    content: "/";
}

.breadcrumb a {
    color: inherit;
}

.content {
    padding-bottom: clamp(4rem, 9vw, 8rem);
}

.content > * + * {
    margin-top: 2rem;
}

.content .frame {
    padding-block: 1.25rem;
}

.content h2,
.content h3 {
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.site-footer {
    border-top: 1px solid var(--color-line);
    background: var(--color-soft);
}

.site-footer__inner {
    min-height: 9rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.site-footer p {
    margin: 0.25rem 0 0;
    color: var(--color-muted);
}

.site-footer__link {
    font-weight: 650;
}

@media (max-width: 48rem) {
    .site-header__bar {
        min-height: 4.25rem;
        flex-wrap: wrap;
        gap: 0;
    }

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

    .main-navigation {
        width: 100%;
        display: none;
        padding-block: 0.5rem 1rem;
    }

    .main-navigation.is-open {
        display: block;
    }

    .main-navigation__list {
        display: block;
    }

    .main-navigation__link,
    .main-navigation__sublink {
        padding: 0.65rem 0.75rem;
    }

    .main-navigation__sublist {
        position: static;
        width: auto;
        margin-left: 1rem;
        padding: 0;
        border: 0;
        box-shadow: none;
        visibility: visible;
        opacity: 1;
        transform: none;
    }

    .site-footer__inner {
        padding-block: 2rem;
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 1rem;
    }
}

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