:root {
    --color-bg: #e7edee;
    --color-surface: #ffffff;
    --color-ink: #171717;
    --color-muted: #6b6b66;
    --color-line: #d7d7d0;
    --color-accent: red;
    --container: 1440px;
    --gutter: clamp(1.25rem, 4vw, 4rem);
    --section-space: clamp(6rem, 12vw, 12rem);
    --radius: 0.25rem;
    --font-base: "Roboto Flex", sans-serif;
    --font-settings-base: "wght" 500, "wdth" 137.22, "opsz" 144, "GRAD" 0, "slnt" 0, "XTRA" 468, "XOPQ" 96, "YOPQ" 79, "YTLC" 514, "YTUC" 712, "YTAS" 750, "YTDE" -203, "YTFI" 738;
    --soft-transition: 1s ease-out;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-base);
    font-variation-settings: var(--font-settings-base);
    font-size: 1rem;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    background-size: cover;
    background-position: center;  
    background-attachment: fixed;  
}

a {
    color: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

h1,
h2,
h3,
h4,
p {
    margin-top: 0;
}

h1 {
    max-width: 12ch;
    margin-bottom: 1.75rem;
    font-size: clamp(2.25rem, 5vw, 5rem);
    font-weight: 500;
    line-height: 0.93;
    letter-spacing: -.025em;
    text-wrap: balance;
}

h2 {
    max-width: 18ch;
    margin-bottom: 1.5rem;
    font-size: clamp(1.85rem, 3vw, 3.5rem);
    font-weight: 500;
    line-height: 1;
    letter-spacing: -.025em;    
    text-wrap: balance;    
}

h3 {
    margin-bottom: 0.75rem;
    font-size: clamp(1.45rem, 2vw, 2rem);
    font-weight: 500;
    line-height: 1.1;
    text-wrap: balance;    
}

h4 {
    margin-bottom: 1.5rem;
    color: var(--color-muted);
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.25;
    text-transform: uppercase;
}

p {
    max-width: 42rem;
    margin-bottom: 1.2rem;
    text-wrap: balance;
}

.overlay { 
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-color: var(--color-bg);
}

#main-content { position: relative; }

form input, form select, form textarea {
    border: 0;
    font-family: var(--font-base);
    font-variation-settings: var(--font-settings-base);
    font-size: inherit;
    padding: 1rem;
    width: 100%;
    border-radius: 3px;
}

.container {
    width: min(100%, var(--container));
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.section {
    padding-block: var(--section-space);
}

.grid {
    display: grid;
    gap: clamp(1.5rem, 3vw, 3.5rem);
}

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

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

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 0;
    left: 0;
    padding: 0.75rem 1rem;
    background: var(--color-ink);
    color: white;
    transform: translateY(-110%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    position: fixed;
    width: 100%;
    z-index: 10;
    transition: var(--soft-transition);
}

body.scrolled, body.menu-open {
    .site-header {
        background: rgb(from var(--color-bg) r g b / 0.9);
    }
}

.header-inner {
    min-height: 5.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    font-size: 1.2rem;
    font-weight: 600;
    text-decoration: none;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: clamp(1rem, 2vw, 2rem);
}

.site-nav a {
    font-size: 0.75rem;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: .125em;
}

.site-nav a[aria-current="page"]:not(.button),
.site-nav a.active:not(.button) {
    text-decoration: underline;
    text-underline-offset: 0.35rem;
}

.menu-toggle {
    display: none;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
}

.hero {
    min-height: 100svh;
    display: flex;
    align-items: center;
}

.hero-grid {
    align-items: center;
}

.lead {
    max-width: 37rem;
    margin-bottom: 2rem;
    font-size: clamp(1.15rem, 1.7vw, 1.55rem);
    line-height: 1.35;
}

.eyebrow,
.card-index,
.platform-code {
    margin-bottom: 1.4rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    position: absolute;
    margin-top: -2rem;    
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.button {
    min-height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.15rem;
    border: 1px solid var(--color-ink);
    border-radius: var(--radius);
    background: var(--color-ink);
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05rem;
    text-decoration: none;
    transition: background-color 160ms ease, color 160ms ease;
}

.button:hover,
.button:focus-visible {
    background: transparent;
    color: var(--color-ink);
}

.button-secondary {
    background: transparent;
    color: var(--color-ink);
}

.button-secondary:hover,
.button-secondary:focus-visible {
    background: var(--color-ink);
    color: white;
}

.button-small {
    min-height: 2.5rem;
    padding: 0.55rem 0.9rem;
}

.button-disabled {
    border-color: var(--color-line);
    background: transparent;
    color: var(--color-muted);
    cursor: not-allowed;
}

.media-placeholder {
    aspect-ratio: 4 / 3;
    margin: 0;
    display: grid;
    place-items: center;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    background:
        linear-gradient(135deg, transparent 49.8%, var(--color-line) 50%, transparent 50.2%),
        var(--color-surface);
    color: var(--color-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.section-heading {
    margin-bottom: clamp(3rem, 6vw, 6rem);
}

.card-grid {
    gap: 3rem;
}

.card {
    min-height: 24rem;
    padding: 3rem;
    background: var(--color-surface);
    border-radius: 3rem;
}

.card .text-link {
    display: inline-block;
    margin-top: 2rem;
}

.text-link {
    font-weight: 600;
    text-underline-offset: 0.3rem;
}

.process-grid article {
    padding-top: 1.25rem;
}

.platform-list {
    display: grid;
}

.platform-row {
    align-items: start;
    padding-block: clamp(2rem, 4vw, 4rem);
    border-top: 1px solid var(--color-line);
}

.platform-row:first-child {
    border-color: var(--color-ink);
}

.platform-row h2 {
    font-size: clamp(1.8rem, 3vw, 3.5rem);
}

.platform-action {
    display: flex;
    justify-content: flex-end;
}

.feature-list {
    gap: 0;
}

.feature {
    padding-block: 1.5rem;
    border-top: 1px solid var(--color-line);
    &:last-child {
        border-bottom: 1px solid var(--color-line);
    }
}

.contact-section {
    background: var(--color-ink);
    color: white;
    position:relative;
    z-index: 20;
}

.contact-section .eyebrow {
    color: rgba(255, 255, 255, 0.7);
}

.contact-section .button {
    border-color: white;
    background: white;
    color: var(--color-ink);
}

.contact-section .button:hover,
.contact-section .button:focus-visible {
    background: transparent;
    color: white;
}

.site-footer {
    padding-block: 4rem 2rem;
    background: var(--color-ink);
    color: white;
    position: relative;
}

.brand-footer {
    margin-bottom: 1rem;
    flex-direction: column;
    align-items: start;    
}

.footer-meta {
    margin-top: 4rem;
    padding-top: 1rem;
    color: rgba(255, 255, 255, 0.65);
}

.flex-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}
.flex-logos > * {
    height: 3rem;
}

@media (max-width: 800px) {
    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .menu-toggle {
        display: block;
    }

    .site-nav {
        position: absolute;
        inset: 100% 0 auto;
        display: none;
        align-items: stretch;
        padding: 1rem var(--gutter) 1.5rem;
        border-bottom: 1px solid var(--color-line);
        background: var(--color-bg);
        flex-direction: column;
    }

    .site-nav.is-open {
        display: flex;
        align-items: end;
    }

    .hero-grid {
        gap: 3rem;
    }

    .media-placeholder {
        order: -1;
        aspect-ratio: 16 / 10;
    }

    .platform-action,
    .footer-contact {
        justify-self: start;
    }

    .card {
        min-height: auto;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}