:root {
    --logo-blue: #15486d;
    --deep-blue: #09263c;
    --night-blue: #071b2b;
    --ink: #14212b;
    --muted: #5b6870;
    --paper: #f8f6f1;
    --paper-strong: #efece4;
    --white: #ffffff;
    --line: #d8e4e9;
    --cyan: #16a9d8;
    --sky: #82d2ea;
    --warm: #a86645;
    --success: #3d7a66;
    --warning: #b0792b;
    --grid-line: rgba(21, 72, 109, 0.08);
    --radius: 8px;
    --shadow: 0 22px 70px rgba(9, 38, 60, 0.14);
    --shadow-sharp: 0 14px 0 rgba(21, 72, 109, 0.08);
    --shell: 1160px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background: var(--paper);
    font-size: 17px;
    line-height: 1.6;
    text-rendering: optimizeLegibility;
}

body.menu-open {
    overflow: hidden;
}

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

a {
    color: inherit;
    text-underline-offset: 0.18em;
}

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

p:last-child,
ol:last-child,
dl:last-child {
    margin-bottom: 0;
}

h1,
h2,
h3 {
    color: inherit;
    line-height: 1.06;
    letter-spacing: 0;
}

h1 {
    max-width: 900px;
    margin-bottom: 26px;
    font-size: 78px;
    font-weight: 820;
}

h2 {
    margin-bottom: 22px;
    font-size: 44px;
    font-weight: 760;
}

h3 {
    margin-bottom: 12px;
    font-size: 24px;
    font-weight: 740;
}

strong {
    font-weight: 760;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 100;
    transform: translateY(-140%);
    padding: 10px 14px;
    border-radius: 6px;
    background: var(--white);
    color: var(--deep-blue);
    font-weight: 700;
}

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

.shell {
    width: min(var(--shell), calc(100% - 48px));
    margin: 0 auto;
}

.section {
    position: relative;
    padding: 104px 0;
    overflow: clip;
    background: var(--white);
}

.section-paper {
    background:
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
        linear-gradient(0deg, rgba(21, 72, 109, 0.06) 1px, transparent 1px),
        var(--paper);
    background-size: 72px 72px;
}

.section-blue {
    color: var(--white);
    background:
        linear-gradient(135deg, rgba(22, 169, 216, 0.16), transparent 36%),
        linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        var(--logo-blue);
    background-size: auto, 64px 64px, 64px 64px, auto;
}

.section-deep {
    color: var(--white);
    background: var(--deep-blue);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 24px;
    align-items: center;
    padding: 14px 32px;
    border-bottom: 1px solid rgba(216, 228, 233, 0.78);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(14px);
    box-shadow: 0 10px 30px rgba(9, 38, 60, 0.08);
}

.brand {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-decoration: none;
}

.brand img {
    display: block;
    width: 172px;
    height: auto;
}

.brand-tagline {
    color: var(--logo-blue);
    font-size: 10px;
    font-weight: 720;
    letter-spacing: 0.14em;
    line-height: 1;
    text-transform: lowercase;
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.site-nav a,
.language-links a,
.site-footer a {
    border-radius: 6px;
    color: var(--deep-blue);
    font-size: 14px;
    font-weight: 760;
    text-decoration: none;
}

.site-nav a {
    padding: 10px 9px;
}

.site-nav a:hover,
.site-nav a.active {
    background: var(--paper);
}

.language-links {
    display: flex;
    align-items: center;
    gap: 6px;
}

.language-links a {
    min-width: 40px;
    padding: 8px 10px;
    border: 1px solid var(--line);
    text-align: center;
}

.language-links a.active {
    border-color: var(--logo-blue);
    background: var(--logo-blue);
    color: var(--white);
}

.menu-toggle {
    display: none;
}

.hero {
    position: relative;
    min-height: calc(100vh - 86px);
    display: flex;
    align-items: center;
    padding: 96px 0 84px;
    overflow: hidden;
    isolation: isolate;
    background: var(--night-blue);
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -2;
    background:
        linear-gradient(118deg, rgba(22, 169, 216, 0.24), transparent 34%),
        linear-gradient(300deg, rgba(168, 102, 69, 0.18), transparent 42%),
        linear-gradient(90deg, rgba(130, 210, 234, 0.11) 1px, transparent 1px),
        linear-gradient(0deg, rgba(130, 210, 234, 0.09) 1px, transparent 1px),
        var(--night-blue);
    background-size: auto, auto, 68px 68px, 68px 68px, auto;
}

.hero::after {
    content: "AI / OPS";
    position: absolute;
    right: max(24px, calc((100vw - var(--shell)) / 2));
    bottom: 28px;
    z-index: -1;
    color: rgba(255, 255, 255, 0.055);
    font-size: 128px;
    font-weight: 900;
    line-height: 0.8;
    white-space: nowrap;
}

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 72px;
    align-items: center;
}

.eyebrow {
    margin-bottom: 18px;
    color: var(--cyan);
    font-size: 13px;
    font-weight: 820;
    line-height: 1.3;
    text-transform: uppercase;
}

.section-paper .eyebrow,
.section .eyebrow {
    color: var(--warm);
}

.section-blue .eyebrow,
.section-deep .eyebrow {
    color: var(--sky);
}

.hero-lede {
    max-width: 760px;
    margin-bottom: 34px;
    color: rgba(255, 255, 255, 0.86);
    font-size: 26px;
    line-height: 1.36;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 18px;
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 820;
    text-decoration: none;
    cursor: pointer;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button-primary {
    border-color: var(--cyan);
    background: var(--cyan);
    color: var(--deep-blue);
    box-shadow: 0 12px 34px rgba(22, 169, 216, 0.28);
}

.button-secondary {
    border-color: rgba(255, 255, 255, 0.28);
    color: var(--white);
    background: rgba(255, 255, 255, 0.08);
}

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

.hero-portrait {
    position: relative;
    width: 100%;
    max-width: 440px;
    justify-self: end;
    overflow: hidden;
    border: 1px solid rgba(130, 210, 234, 0.28);
    border-radius: var(--radius);
    aspect-ratio: 4 / 5;
    background: rgba(255, 255, 255, 0.07);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.26);
}

.hero-portrait::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(180deg, rgba(7, 27, 43, 0), rgba(7, 27, 43, 0.22)),
        linear-gradient(90deg, rgba(22, 169, 216, 0.16), transparent 42%);
}

.hero-portrait img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 52% 36%;
}

.split {
    display: grid;
    grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.1fr);
    gap: 72px;
}

.section-intro h2,
.section-heading h2 {
    max-width: 840px;
}

.section-heading {
    max-width: 860px;
    margin-bottom: 48px;
}

.section-heading.compact {
    margin-bottom: 34px;
}

.section-lede {
    max-width: 760px;
    color: var(--muted);
    font-size: 20px;
    line-height: 1.55;
}

.diagnostic-example {
    margin-top: 18px;
    padding: 18px 20px;
    border-left: 4px solid var(--cyan);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 10px 34px rgba(9, 38, 60, 0.06);
    font-size: 18px;
}

.dense-copy {
    color: var(--muted);
    font-size: 19px;
}

.dense-copy p {
    margin-bottom: 22px;
}

.dense-copy strong {
    color: var(--ink);
}

.signal-list {
    display: grid;
    gap: 14px;
    padding: 0;
    margin: 0 0 24px;
    list-style: none;
}

.signal-list li {
    padding: 16px 18px;
    border-left: 4px solid var(--cyan);
    border-radius: var(--radius);
    color: var(--muted);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 10px 34px rgba(9, 38, 60, 0.06);
}

.signal-list strong {
    color: var(--ink);
}

.diagnostic-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.diagnostic-card,
.mode-card,
.sequence-step,
.context-grid article {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: 0 18px 48px rgba(9, 38, 60, 0.08);
}

.diagnostic-card::before,
.mode-card::before,
.sequence-step::before,
.context-grid article::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 4px;
    background: linear-gradient(90deg, var(--cyan), rgba(168, 102, 69, 0.78));
}

.diagnostic-card {
    padding: 28px;
}

.diagnostic-card span {
    display: inline-block;
    margin-bottom: 18px;
    padding: 5px 8px;
    border: 1px solid var(--line);
    border-radius: 5px;
    color: var(--logo-blue);
    background: var(--paper);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 13px;
    font-weight: 760;
}

.diagnostic-card p {
    color: var(--muted);
}

.diagnostic-card-wide {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(180px, 0.6fr) minmax(0, 1fr);
    gap: 22px;
    align-items: start;
}

.diagnostic-output {
    grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
    align-items: stretch;
}

.dual-reading {
    grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 246, 241, 0.92)),
        var(--white);
}

.dual-reading h3 {
    margin-bottom: 0;
}

.dual-reading p {
    margin-bottom: 0;
    color: var(--ink);
    font-size: 18px;
    line-height: 1.55;
}

.diagnostic-output-head {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.diagnostic-output-head p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 17px;
    line-height: 1.5;
}

.output-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.output-grid div {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: var(--paper);
}

.output-grid strong {
    display: block;
    margin-bottom: 8px;
    color: var(--ink);
    font-size: 15px;
}

.output-grid p {
    margin-bottom: 0;
    font-size: 14px;
    line-height: 1.45;
}

.diagnostic-card ul {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.diagnostic-card li {
    display: grid;
    grid-template-columns: 16px 1fr;
    gap: 10px;
    align-items: start;
    color: var(--ink);
}

.diagnostic-card li::before {
    content: "";
    width: 8px;
    height: 8px;
    margin-top: 9px;
    border-radius: 999px;
    background: var(--cyan);
}

.sequence {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 34px;
}

.fit-panel {
    max-width: 860px;
    margin-bottom: 34px;
    padding: 26px 28px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-left: 4px solid var(--sky);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.11);
    box-shadow: 0 18px 54px rgba(0, 0, 0, 0.14);
}

.fit-panel h3,
.fit-panel p {
    color: var(--white);
}

.fit-panel p {
    max-width: 760px;
}

.sequence-step {
    min-height: 320px;
    padding: 28px;
    color: var(--ink);
}

.sequence-step > span {
    display: block;
    margin-bottom: 58px;
    color: var(--cyan);
    font-size: 50px;
    font-weight: 860;
    line-height: 1;
}

.context-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 34px;
}

.context-grid article {
    padding: 22px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.94);
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.mode-card {
    padding: 24px;
    color: var(--ink);
}

.mode-card p,
.sequence-step p,
.context-grid p {
    color: var(--muted);
}

.custom-note {
    max-width: 780px;
    margin: 36px 0 0;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--white);
    font-size: 26px;
    font-weight: 780;
    line-height: 1.24;
}

.bio-layout {
    display: grid;
    grid-template-columns: 390px minmax(0, 1fr);
    gap: 72px;
    align-items: start;
}

.bio-media {
    position: sticky;
    top: 118px;
}

.bio-media img {
    display: block;
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.bio-media dl {
    display: grid;
    gap: 0;
    margin-top: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--white);
}

.bio-media dl div {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 16px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
}

.bio-media dl div:last-child {
    border-bottom: 0;
}

.bio-media dt {
    color: var(--muted);
    font-size: 13px;
    font-weight: 780;
}

.bio-media dd {
    margin: 0;
    color: var(--ink);
    font-size: 14px;
    font-weight: 720;
}

.bio-copy {
    color: var(--muted);
    font-size: 19px;
}

.bio-copy h2 {
    color: var(--ink);
}

.bio-copy p {
    margin-bottom: 22px;
}

.bio-copy strong {
    color: var(--ink);
}

.reference-note {
    max-width: 860px;
    margin-top: 22px;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-left: 4px solid var(--cyan);
    border-radius: var(--radius);
    background: var(--white);
}

.reference-note h3 {
    margin-bottom: 6px;
    color: var(--ink);
    font-size: 16px;
    line-height: 1.25;
}

.reference-note a,
.dense-copy a {
    color: var(--logo-blue);
    font-weight: 780;
}

.reference-note p {
    margin-bottom: 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.55;
}

.logo-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--line);
    box-shadow: var(--shadow-sharp);
}

.logo-grid img {
    width: 100%;
    height: 112px;
    object-fit: contain;
    padding: 22px;
    background: var(--white);
    filter: saturate(0.85);
}

.contact-section {
    padding: 86px 0 96px;
    background:
        linear-gradient(135deg, rgba(22, 169, 216, 0.2), transparent 36%),
        linear-gradient(90deg, rgba(130, 210, 234, 0.1) 1px, transparent 1px),
        linear-gradient(0deg, rgba(130, 210, 234, 0.08) 1px, transparent 1px),
        var(--night-blue);
    background-size: auto, 72px 72px, 72px 72px, auto;
}

.contact-layout {
    max-width: 860px;
}

.contact-section h2 {
    margin-bottom: 0;
}

.email-link {
    display: inline-block;
    margin: 18px 0 0;
    padding-bottom: 8px;
    border-bottom: 3px solid var(--cyan);
    color: var(--sky);
    font-size: 42px;
    font-weight: 820;
    line-height: 1.2;
    text-decoration: none;
}

.email-link:hover {
    text-decoration: underline;
}

.site-footer {
    padding: 22px 0;
    color: rgba(255, 255, 255, 0.84);
    background: var(--ink);
}

.footer-layout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.site-footer p {
    margin: 0;
    font-size: 14px;
}

.site-footer div div {
    display: flex;
    gap: 12px;
}

.site-footer a {
    color: var(--white);
}

.bridge-copy {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: var(--shadow);
}

.bridge-avatar {
    display: block;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    object-position: 50% 28%;
    box-shadow: 0 14px 30px rgba(5, 29, 47, 0.18);
}

.not-found {
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.not-found img {
    display: block;
    width: 210px;
}

.not-found-brand {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 7px;
    margin-bottom: 44px;
}

.not-found-brand span {
    color: var(--sky);
    font-size: 13px;
    font-weight: 720;
    letter-spacing: 0.15em;
    line-height: 1;
    text-transform: lowercase;
}

.not-found p:not(.eyebrow) {
    max-width: 520px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 22px;
}

[data-reveal] {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 520ms ease, transform 520ms ease;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

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

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
    }
}

@media (max-width: 1080px) {
    h1 {
        font-size: 58px;
    }

    h2 {
        font-size: 38px;
    }

    .site-header {
        grid-template-columns: auto auto auto;
    }

    .site-nav {
        position: fixed;
        inset: 78px 18px auto 18px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: var(--white);
        box-shadow: var(--shadow);
    }

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

    .site-nav a {
        padding: 13px 12px;
    }

    .menu-toggle {
        display: inline-flex;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        flex-direction: column;
        gap: 5px;
        border: 1px solid var(--line);
        border-radius: 6px;
        background: var(--white);
        cursor: pointer;
    }

    .menu-toggle span:not(.sr-only) {
        display: block;
        width: 20px;
        height: 2px;
        background: var(--deep-blue);
    }

    .hero-layout,
    .split,
    .bio-layout,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 44px;
    }

    .hero-layout {
        align-items: start;
    }

    .hero-portrait {
        max-width: 520px;
        justify-self: start;
    }

    .bio-media {
        position: static;
        max-width: 520px;
    }

    .diagnostic-grid,
    .sequence,
    .context-grid {
        grid-template-columns: 1fr;
    }

    .diagnostic-output {
        grid-template-columns: 1fr;
    }

    .sequence-step {
        min-height: auto;
    }

    .sequence-step > span {
        margin-bottom: 24px;
    }

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

    .logo-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    body {
        font-size: 16px;
    }

    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 30px;
    }

    h3 {
        font-size: 21px;
    }

    .shell {
        width: min(100% - 32px, var(--shell));
    }

    .section {
        padding: 72px 0;
    }

    .site-header {
        gap: 10px;
        padding: 10px 14px;
    }

    .brand img {
        width: 132px;
    }

    .brand-tagline {
        font-size: 8px;
        letter-spacing: 0.1em;
    }

    .language-links a {
        min-width: 36px;
        padding: 7px 8px;
        font-size: 12px;
    }

    .hero {
        min-height: auto;
        padding: 72px 0;
    }

    .hero-portrait {
        max-width: none;
        aspect-ratio: 4 / 3;
    }

    .hero-portrait img {
        object-position: 52% 34%;
    }

    .hero-lede {
        font-size: 20px;
    }

    .hero-actions,
    .button {
        width: 100%;
    }

    .button {
        min-height: 46px;
    }

    .dense-copy,
    .bio-copy {
        font-size: 17px;
    }

    .custom-note {
        font-size: 22px;
    }

    .diagnostic-grid,
    .mode-grid {
        grid-template-columns: 1fr;
    }

    .diagnostic-card-wide {
        grid-template-columns: 1fr;
    }

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

    .bio-media dl div {
        grid-template-columns: 1fr;
        gap: 2px;
    }

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

    .logo-grid img {
        height: 96px;
        padding: 18px;
    }

    .bridge-copy {
        grid-template-columns: 56px minmax(0, 1fr);
        gap: 14px;
        padding: 18px;
    }

    .bridge-avatar {
        width: 56px;
        height: 56px;
    }

    .email-link {
        font-size: 25px;
        overflow-wrap: anywhere;
    }

    .footer-layout {
        align-items: flex-start;
        flex-direction: column;
    }

}