:root {
    --paper: #eceeed;
    --paper-soft: #e5e7e6;
    --paper-bright: #f1f3f2;
    --ink: #101214;
    --rescue-red: #b3202a;
    --ink-muted: rgba(16, 18, 20, 0.68);
    --ink-faint: rgba(16, 18, 20, 0.52);
    --line: rgba(16, 18, 20, 0.07);
    --line-soft: rgba(16, 18, 20, 0.06);
    --dark: #070809;
    --dark-muted: rgba(255, 255, 255, 0.7);
    --dark-faint: rgba(255, 255, 255, 0.42);
    --dark-line: rgba(255, 255, 255, 0.1);
    --max-width: 1280px;
    --sans: "Instrument Sans", "Avenir Next", "Segoe UI", sans-serif;
    --mono: "IBM Plex Mono", monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    display: block;
    max-width: 100%;
}

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

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

a:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 4px;
}

.container {
    width: min(calc(100% - 56px), var(--max-width));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(241, 243, 242, 0.9);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(16, 18, 20, 0.06);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.48) inset;
}

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

.header-row {
    min-height: 84px;
}

.brand img,
.footer-brand img {
    width: clamp(170px, 16vw, 220px);
}

.brand {
    display: inline-flex;
    align-items: center;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 28px;
    flex-wrap: wrap;
}

.site-nav a {
    color: rgba(16, 18, 20, 0.62);
    font-size: 0.88rem;
    letter-spacing: -0.01em;
    transition: color 160ms ease;
}

.site-nav a:hover {
    color: var(--ink);
}

.nav-lang {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-left: 4px;
    padding-left: 14px;
    border-left: 1px solid var(--line);
}

.nav-lang-link,
.nav-lang-current {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.nav-lang-link {
    color: var(--ink-faint);
}

.nav-lang-link:hover {
    color: var(--ink);
}

.nav-lang-current {
    color: var(--ink);
}

.nav-cta {
    color: var(--ink);
    position: relative;
    padding-bottom: 2px;
}

.nav-cta::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: rgba(16, 18, 20, 0.16);
}

.hero,
.principles,
.site-footer {
    position: relative;
    overflow: clip;
}

.hero {
    padding: 152px 0 132px;
    background: var(--paper-bright);
}

.hero::before,
.principles::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(16, 18, 20, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(16, 18, 20, 0.02) 1px, transparent 1px);
    background-size: 160px 160px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.16), transparent 88%);
    pointer-events: none;
}

.hero::after {
    content: none;
}

.hero-layout,
.model-grid,
.section-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(320px, 0.8fr);
    gap: 118px;
    align-items: start;
}

.eyebrow,
.profile-label,
.list-index {
    margin: 0;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--ink-faint);
}

.eyebrow::before {
    content: "";
    width: 44px;
    height: 1px;
    background: linear-gradient(90deg, rgba(16, 18, 20, 0.62), transparent);
}

.section-grid-dark .eyebrow::before {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.42), transparent);
}

.eyebrow-dark {
    color: var(--ink-faint);
}

.hero-copy h1,
.section-intro h2 {
    margin: 0;
    font-weight: 600;
    letter-spacing: -0.065em;
    line-height: 0.92;
    text-wrap: balance;
}

.hero-copy h1 {
    max-width: 7.6ch;
    margin-top: 22px;
}

.hero-intro {
    max-width: 46ch;
    margin: 30px 0 0;
    color: rgba(16, 18, 20, 0.6);
    font-size: 0.88rem;
    line-height: 1.88;
}

.hero-kicker,
.hero-main {
    display: block;
}

.hero-kicker {
    color: rgba(16, 18, 20, 0.46);
    font-size: clamp(3.15rem, 5.7vw, 5.45rem);
}

.hero-main {
    margin-top: 8px;
    font-size: clamp(4.15rem, 7.6vw, 7.15rem);
}

.hero-subtitle,
.section-lead,
.list-copy p,
.footer-meta {
    color: var(--ink-muted);
}

.hero-subtitle {
    max-width: 36ch;
    margin: 38px 0 0;
    font-size: 1rem;
    line-height: 1.94;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 22px;
    margin-top: 46px;
}

.button-primary,
.button-secondary {
    font-size: 0.9rem;
    font-weight: 500;
}

.button-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 20px;
    border-radius: 999px;
    background: var(--ink);
    color: var(--paper-bright);
    box-shadow: 0 0 0 1px rgba(16, 18, 20, 0.04) inset;
    transition: transform 160ms ease, opacity 160ms ease;
}

.button-primary:hover {
    transform: translateY(-1px);
    opacity: 0.92;
}

.button-secondary {
    display: inline-flex;
    align-items: center;
    position: relative;
    color: var(--ink);
    padding-bottom: 3px;
    letter-spacing: -0.01em;
}

.button-secondary::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: rgba(16, 18, 20, 0.2);
}

.hero-footnote {
    max-width: 34ch;
    margin: 48px 0 0;
    padding-top: 24px;
    border-top: 1px solid var(--line);
    color: var(--ink-faint);
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    line-height: 1.9;
}

.hero-aside {
    padding-top: 12px;
}

.hero-mark-wrap {
    position: relative;
    min-height: 304px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--line);
}

.hero-mark {
    position: absolute;
    inset: 0;
    margin: auto;
}

.hero-mark {
    position: relative;
    width: min(100%, 206px);
}

.hero-profile {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.profile-label {
    color: var(--ink-faint);
}

.profile-statement {
    max-width: 18ch;
    margin: 12px 0 0;
    color: var(--ink);
    font-size: 1.1rem;
    line-height: 1.46;
    letter-spacing: -0.03em;
}

.profile-list,
.section-list {
    margin-top: 30px;
}

.profile-row,
.list-row {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    padding: 18px 0 20px;
}

.profile-row {
    border-top: 1px solid var(--line-soft);
}

.profile-row span {
    color: var(--ink-faint);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    padding-top: 3px;
}

.profile-row p {
    margin: 0;
    color: var(--ink-muted);
    line-height: 1.72;
}

.operating-model,
.software,
.capabilities {
    padding: 168px 0;
    border-top: 1px solid var(--line-soft);
}

.section-intro h2 {
    margin-top: 18px;
    font-size: clamp(2.8rem, 5.2vw, 4.95rem);
    max-width: 9.5ch;
}

.section-body {
    padding-top: 8px;
}

.section-lead {
    max-width: 42ch;
    margin: 0;
    font-size: 1rem;
    line-height: 1.92;
}

.software-body {
    display: grid;
    gap: 38px;
}

.software-product {
    display: grid;
    gap: 24px;
    padding-top: 28px;
    border-top: 1px solid var(--line);
}

.software-product-head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 28px;
    align-items: start;
}

.software-title-block,
.software-status-block {
    display: grid;
    gap: 12px;
    align-content: start;
}

.software-status-block {
    justify-items: start;
    min-width: 220px;
}

.software-label,
.software-status,
.software-detail-label,
.software-fact dt,
.software-module span {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.software-label {
    margin: 0;
    color: var(--ink-faint);
}

.software-product-head h3 {
    margin: 0;
    color: var(--rescue-red);
    font-size: clamp(2.1rem, 3.6vw, 3.6rem);
    line-height: 0.96;
    letter-spacing: -0.05em;
}

.software-status {
    display: block;
    margin: 0;
    color: var(--ink-faint);
}

.software-product-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
    gap: 60px;
    align-items: start;
    padding-top: 10px;
}

.software-overview,
.software-detail {
    display: grid;
    gap: 24px;
}

.software-summary {
    max-width: 56ch;
    margin: 0;
    color: var(--ink-muted);
    font-size: 1rem;
    line-height: 1.9;
}

.software-facts {
    display: grid;
    gap: 20px;
    margin: 0;
    padding-top: 8px;
}

.software-fact {
    display: grid;
    gap: 8px;
    padding-top: 18px;
    border-top: 1px solid var(--line-soft);
}

.software-detail-label,
.software-fact dt {
    margin: 0;
    color: var(--ink-faint);
}

.software-fact dd {
    max-width: 42ch;
    margin: 0;
    color: var(--ink);
    font-size: 1rem;
    line-height: 1.72;
}

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

.software-module {
    padding: 18px 0 0;
    border-top: 1px solid var(--line-soft);
}

.software-module span {
    display: block;
    color: var(--ink-faint);
}

.software-module p {
    margin: 10px 0 0;
    color: var(--ink);
    font-size: 1rem;
    line-height: 1.6;
}

.list-row {
    border-top: 1px solid rgba(16, 18, 20, 0.07);
}

.list-row:last-child {
    border-bottom: 1px solid var(--line);
}

.list-index {
    color: var(--ink-faint);
    padding-top: 4px;
}

.list-copy h3 {
    margin: 0;
    font-size: 1.18rem;
    font-weight: 600;
    letter-spacing: -0.035em;
    line-height: 1.15;
}

.list-copy p {
    max-width: 54ch;
    margin: 12px 0 0;
    font-size: 0.94rem;
    line-height: 1.72;
}

.principles {
    padding: 168px 0 152px;
    background: var(--dark);
    color: var(--paper-bright);
}

.principles::before {
    content: none;
}

.section-grid-dark .eyebrow,
.section-grid-dark .list-index {
    color: var(--dark-faint);
}

.section-intro-dark h2,
.section-body-dark .list-copy h3 {
    color: var(--paper-bright);
}

.section-lead-dark,
.section-body-dark .list-copy p {
    color: var(--dark-muted);
}

.list-row-dark {
    border-top-color: var(--dark-line);
}

.list-row-dark:last-child {
    border-bottom-color: var(--dark-line);
}

.site-footer {
    padding: 60px 0 30px;
    background: var(--dark);
    border-top: 1px solid var(--dark-line);
}

.footer-shell {
    display: grid;
    gap: 36px;
}

.footer-row {
    align-items: start;
}

.footer-brand {
    display: inline-flex;
    align-items: center;
}

.footer-brand img {
    width: 30px;
    filter: invert(1);
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(120px, 180px));
    gap: 44px 72px;
}

.footer-column {
    display: grid;
    gap: 18px;
    justify-items: start;
}

.footer-label {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--dark-faint);
}

.footer-column a {
    color: var(--paper-bright);
    font-size: 1.02rem;
    line-height: 1.2;
}

.footer-column a:hover {
    color: var(--dark-muted);
}

.footer-legal {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px 32px;
    padding-top: 18px;
    border-top: 1px solid var(--dark-line);
    color: var(--dark-faint);
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
}

@media (max-width: 1080px) {
    .hero-layout,
    .model-grid,
    .section-grid {
        grid-template-columns: 1fr;
        gap: 68px;
    }

    .hero-copy h1 {
        max-width: 10.2ch;
    }

    .hero-aside {
        max-width: 560px;
        padding-top: 0;
    }
}

@media (max-width: 780px) {
    .container {
        width: min(calc(100% - 32px), var(--max-width));
    }

    .header-row,
    .footer-row {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-nav {
        justify-content: flex-start;
        gap: 14px 18px;
    }

    .nav-lang {
        margin-left: 0;
        padding-left: 0;
        border-left: 0;
    }

    .footer-nav {
        grid-template-columns: 1fr;
        gap: 26px;
    }

    .footer-legal {
        grid-template-columns: 1fr;
        gap: 10px;
        justify-items: start;
    }

    .hero {
        padding: 102px 0 80px;
    }

    .hero::before,
    .principles::before {
        background-size: 120px 120px;
    }

    .hero-kicker {
        font-size: clamp(2.5rem, 10vw, 3.8rem);
    }

    .hero-main {
        font-size: clamp(3.1rem, 11.6vw, 4.6rem);
    }

    .hero-subtitle,
    .section-lead {
        font-size: 1rem;
    }

    .hero-intro {
        margin-top: 24px;
        font-size: 0.84rem;
    }

    .hero-footnote {
        margin-top: 32px;
    }

    .hero-mark-wrap {
        min-height: 196px;
    }

    .hero-mark {
        width: min(100%, 126px);
    }

    .operating-model,
    .software,
    .capabilities,
    .principles {
        padding: 112px 0;
    }

    .software-product-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .software-modules {
        grid-template-columns: 1fr;
    }

    .software-product-head {
        grid-template-columns: 1fr;
        gap: 16px;
        align-items: start;
    }

    .profile-row,
    .list-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .list-index,
    .profile-row span {
        padding-top: 0;
    }
}

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

    * {
        transition: none !important;
    }
}