/* ============================================
   1. VARIABLES / HERO IMAGE CONTROL
   Replace the path below when using a custom hero image.
============================================ */
:root {
    --hero-image: none;
    --paper: #f4f1e8;
    --paper-light: #fbfaf6;
    --ink: #15151a;
    --ink-soft: #4b4a50;
    --violet: #5b45ff;
    --violet-dark: #4030cc;
    --concrete: #d8d5cc;
    --white: #ffffff;
    --gutter: clamp(1.1rem, 4vw, 5rem);
    --section-space: clamp(6rem, 12vw, 12rem);
    --rule: 1px solid rgba(21, 21, 26, 0.34);
    --max-width: 112rem;
}

/* ============================================
   2. RESET / BASE
============================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5.5rem;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    overflow-x: hidden;
}

body::selection {
    color: var(--white);
    background: var(--violet);
}

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

a {
    color: inherit;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.22em;
}

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

:focus-visible {
    outline: 3px solid var(--violet);
    outline-offset: 4px;
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 1rem;
    left: 1rem;
    padding: 0.75rem 1rem;
    color: var(--white);
    background: var(--ink);
    transform: translateY(-160%);
}

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

.section-pad {
    padding-inline: var(--gutter);
}

.section-label {
    margin: 0;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    line-height: 1.2;
    text-transform: uppercase;
}

/* ============================================
   3. HEADER
============================================ */
.site-header {
    position: relative;
    z-index: 20;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    min-height: 5.25rem;
    padding-inline: var(--gutter);
    align-items: center;
    border-bottom: var(--rule);
    background: var(--paper);
}

.site-logo {
    width: 11rem;
    text-decoration: none;
}

.site-nav {
    display: flex;
    gap: clamp(1.25rem, 3vw, 3rem);
    align-items: center;
}

.site-nav a,
.header-contact {
    position: relative;
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
}

.site-nav a::after {
    position: absolute;
    right: 0;
    bottom: -0.38rem;
    left: 0;
    height: 1px;
    background: currentColor;
    content: "";
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
}

.header-contact {
    display: flex;
    gap: 1rem;
    justify-self: end;
    align-items: center;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--ink);
}

.header-contact span:last-child {
    transition: transform 180ms ease;
}

.header-contact:hover span:last-child {
    transform: translate(0.25rem, 0.25rem);
}

/* ============================================
   4. HERO
============================================ */
.hero {
    position: relative;
    display: grid;
    min-height: calc(100svh - 5.25rem);
    padding: clamp(2rem, 5vw, 5rem) var(--gutter) clamp(2.5rem, 5vw, 5rem);
    background-color: var(--paper);
    background-image:
        linear-gradient(rgba(244, 241, 232, 0.8), rgba(244, 241, 232, 0.88)),
        var(--hero-image);
    background-position: center;
    background-size: cover;
    grid-template-rows: auto 1fr auto;
    isolation: isolate;
    overflow: hidden;
}

.hero-intro {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.hero-kicker,
.hero-note {
    margin: 0;
}

.hero-kicker {
    max-width: 14rem;
    font-size: 0.85rem;
    font-weight: 650;
}

.hero-note {
    font-family: "Courier New", Courier, monospace;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    line-height: 1.65;
    text-align: right;
    text-transform: uppercase;
}

.shift-word {
    position: absolute;
    z-index: -1;
    top: 44%;
    right: -0.04em;
    left: -0.03em;
    height: clamp(7rem, 18vw, 21rem);
    color: var(--ink);
    font-size: clamp(4.9rem, 17vw, 20rem);
    font-weight: 800;
    letter-spacing: -0.085em;
    line-height: 0.76;
    pointer-events: none;
    transform: translateY(-50%);
    white-space: nowrap;
}

.shift-word span {
    position: absolute;
    inset: 0;
}

.shift-word-top {
    clip-path: inset(0 0 49.5% 0);
    transform: translateX(-1.1vw);
}

.shift-word-bottom {
    color: var(--violet);
    clip-path: inset(50.5% 0 0 0);
    transform: translateX(1.1vw);
}

.hero-copy {
    display: grid;
    width: min(100%, 62rem);
    margin-top: auto;
    padding-top: clamp(14rem, 30vw, 27rem);
    grid-template-columns: minmax(0, 1.25fr) minmax(16rem, 0.75fr);
    column-gap: clamp(2rem, 8vw, 8rem);
    align-items: end;
}

.hero-copy h1 {
    margin: 0;
    font-size: clamp(3.1rem, 6.5vw, 7.6rem);
    font-weight: 400;
    letter-spacing: -0.065em;
    line-height: 0.88;
}

.hero-copy > p {
    max-width: 30rem;
    margin: 0 0 0.4rem;
    font-size: clamp(1rem, 1.25vw, 1.2rem);
}

.line-action {
    display: grid;
    margin-top: clamp(2rem, 4vw, 3.75rem);
    grid-column: 2;
    grid-template-columns: auto 1fr auto;
    gap: 1rem;
    align-items: center;
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
}

.line-action-track {
    height: 1px;
    background: currentColor;
    transition: transform 180ms ease;
    transform-origin: left;
}

.line-action:hover .line-action-track {
    transform: scaleX(0.72);
}

.hero-edge-note {
    position: absolute;
    right: 0.7rem;
    bottom: 1.5rem;
    margin: 0;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.62rem;
    letter-spacing: 0.16em;
    writing-mode: vertical-rl;
}

/* ============================================
   5. PERSPECTIVE
============================================ */
.perspective {
    padding-top: var(--section-space);
    padding-bottom: var(--section-space);
    background: var(--paper-light);
}

.section-heading {
    display: grid;
    grid-template-columns: minmax(10rem, 0.55fr) minmax(0, 1.45fr);
    gap: clamp(2rem, 6vw, 6rem);
    align-items: start;
}

.section-heading h2 {
    max-width: 69rem;
    margin: 0;
    font-size: clamp(2.8rem, 6vw, 7rem);
    font-weight: 400;
    letter-spacing: -0.06em;
    line-height: 0.92;
}

.section-heading h2 em {
    color: var(--violet);
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 400;
}

.exchange {
    display: grid;
    max-width: var(--max-width);
    margin: clamp(5rem, 10vw, 10rem) auto 0;
    border-top: var(--rule);
    border-bottom: var(--rule);
    grid-template-columns: 1fr clamp(5rem, 8vw, 9rem) 1fr;
}

.exchange-side {
    min-width: 0;
    padding: clamp(2rem, 4vw, 4.5rem);
}

.exchange-side-in {
    color: var(--paper-light);
    background: var(--ink);
}

.exchange-side-out {
    color: var(--white);
    background: var(--violet);
}

.exchange-label {
    margin: 0 0 clamp(2rem, 5vw, 5rem);
    font-family: "Courier New", Courier, monospace;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

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

.exchange li {
    padding: 0.65rem 0;
    border-top: 1px solid currentColor;
    font-size: clamp(1.25rem, 2.2vw, 2.4rem);
    letter-spacing: -0.035em;
}

.exchange-pivot {
    display: grid;
    color: var(--ink);
    background: var(--concrete);
    place-items: center;
}

.exchange-pivot span {
    font-size: clamp(2rem, 4vw, 4.5rem);
    transition: transform 220ms ease;
}

.exchange:hover .exchange-pivot span {
    transform: translateX(0.45rem);
}

/* ============================================
   6. CAPABILITIES
============================================ */
.capabilities {
    color: var(--paper-light);
    background: var(--ink);
}

.capabilities-intro {
    display: grid;
    padding-top: var(--section-space);
    padding-bottom: clamp(4rem, 8vw, 7rem);
    grid-template-columns: 0.45fr 1.1fr 0.6fr;
    gap: clamp(2rem, 5vw, 5rem);
    align-items: start;
}

.capabilities-intro h2 {
    margin: 0;
    font-size: clamp(2.6rem, 5vw, 6rem);
    font-weight: 400;
    letter-spacing: -0.055em;
    line-height: 0.92;
}

.capabilities-intro > p:last-child {
    max-width: 27rem;
    margin: 0;
    font-size: 1rem;
}

.capability-matrix {
    display: grid;
    min-height: 44rem;
    border-top: 1px solid rgba(255, 255, 255, 0.35);
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(2, minmax(19rem, auto));
}

.capability {
    position: relative;
    display: flex;
    min-width: 0;
    padding: clamp(1.5rem, 3vw, 3.5rem);
    flex-direction: column;
    border-right: 1px solid rgba(255, 255, 255, 0.35);
    border-bottom: 1px solid rgba(255, 255, 255, 0.35);
    overflow: hidden;
    transition: background-color 180ms ease, color 180ms ease;
}

.capability-a {
    grid-column: 1 / span 7;
}

.capability-b {
    grid-column: 8 / -1;
}

.capability-c {
    grid-column: 1 / span 5;
}

.capability-d {
    grid-column: 6 / -1;
}

.capability:hover {
    color: var(--ink);
    background: var(--paper);
}

.capability-index {
    margin: 0 0 auto;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.72rem;
}

.capability h3 {
    max-width: 35rem;
    margin: 3rem 0 1.25rem;
    font-size: clamp(2.2rem, 4vw, 5.3rem);
    font-weight: 400;
    letter-spacing: -0.06em;
    line-height: 0.9;
}

.capability > p:not(.capability-index) {
    max-width: 31rem;
    margin: 0;
}

.capability-tail {
    position: absolute;
    right: 1rem;
    bottom: -0.13em;
    color: transparent;
    font-size: clamp(4rem, 9vw, 10rem);
    font-weight: 800;
    letter-spacing: -0.08em;
    line-height: 0.75;
    -webkit-text-stroke: 1px currentColor;
    opacity: 0.14;
    pointer-events: none;
}

/* ============================================
   7. WORKING RHYTHM
============================================ */
.rhythm {
    padding-top: var(--section-space);
    padding-bottom: var(--section-space);
    background: var(--concrete);
}

.rhythm-heading {
    display: grid;
    grid-template-columns: 0.45fr 1.55fr;
    gap: clamp(2rem, 6vw, 6rem);
}

.rhythm-heading h2 {
    max-width: 72rem;
    margin: 0;
    font-size: clamp(3rem, 6vw, 7.5rem);
    font-weight: 400;
    letter-spacing: -0.065em;
    line-height: 0.9;
}

.rhythm-sequence {
    display: grid;
    margin: clamp(5rem, 11vw, 11rem) 0 0;
    padding: 0;
    list-style: none;
    grid-template-columns: repeat(4, 1fr);
}

.rhythm-sequence li {
    min-height: 26rem;
    padding: 1.25rem;
    border-top: var(--rule);
    border-right: var(--rule);
}

.rhythm-sequence li:nth-child(2) {
    transform: translateY(3.5rem);
}

.rhythm-sequence li:nth-child(3) {
    transform: translateY(7rem);
}

.rhythm-sequence li:nth-child(4) {
    transform: translateY(10.5rem);
}

.rhythm-word {
    display: block;
    font-size: clamp(2rem, 3.4vw, 4rem);
    letter-spacing: -0.055em;
}

.rhythm-sequence p {
    max-width: 19rem;
    margin: 10rem 0 0;
}

/* ============================================
   8. PRINCIPLES
============================================ */
.principles {
    display: grid;
    min-height: 80svh;
    padding: var(--section-space) var(--gutter);
    color: var(--white);
    background: var(--violet);
    grid-template-columns: minmax(0, 1.55fr) minmax(18rem, 0.45fr);
    gap: clamp(3rem, 8vw, 8rem);
    align-items: end;
}

.principles-statement h2 {
    margin: clamp(4rem, 10vw, 9rem) 0 0;
    font-size: clamp(3.4rem, 7.5vw, 9rem);
    font-weight: 400;
    letter-spacing: -0.07em;
    line-height: 0.88;
}

.principles-statement h2 span {
    color: var(--ink);
}

.principles-notes {
    padding-bottom: 0.6rem;
}

.principles-notes p {
    max-width: 26rem;
    margin: 0;
    padding: 1.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.65);
}

/* ============================================
   9. CONTACT EXIT
============================================ */
.contact-exit {
    display: grid;
    padding: var(--section-space) var(--gutter) clamp(4rem, 8vw, 8rem);
    color: var(--ink);
    background: var(--paper-light);
    grid-template-columns: 0.55fr 1.45fr;
    gap: clamp(3rem, 7vw, 7rem);
}

.contact-meta > p:last-child {
    max-width: 22rem;
    margin: 2rem 0 0;
    font-size: 1.1rem;
}

.contact-exit h2 {
    margin: 0;
    font-size: clamp(4rem, 10vw, 12rem);
    font-weight: 400;
    letter-spacing: -0.08em;
    line-height: 0.78;
}

.email-exit {
    display: grid;
    margin-top: clamp(5rem, 11vw, 11rem);
    padding: 1.5rem 0;
    border-top: 2px solid var(--ink);
    border-bottom: 2px solid var(--ink);
    grid-column: 1 / -1;
    grid-template-columns: 1fr auto;
    align-items: center;
    text-decoration: none;
}

.email-address {
    min-width: 0;
    font-size: clamp(2rem, 7vw, 8.5rem);
    letter-spacing: -0.07em;
    line-height: 0.9;
    overflow-wrap: anywhere;
}

.email-arrow {
    display: grid;
    width: clamp(4rem, 9vw, 9rem);
    aspect-ratio: 1;
    margin-left: 2rem;
    color: var(--white);
    background: var(--ink);
    font-size: clamp(1.8rem, 4vw, 4rem);
    place-items: center;
    transition: background-color 180ms ease, transform 180ms ease;
}

.email-exit:hover .email-arrow {
    background: var(--violet);
    transform: translate(0.4rem, -0.4rem);
}

/* ============================================
   10. FOOTER
============================================ */
.site-footer {
    display: grid;
    padding: clamp(3rem, 6vw, 6rem) var(--gutter);
    color: var(--paper);
    background: var(--ink);
    grid-template-columns: 1fr auto 1fr;
    gap: 3rem;
    align-items: end;
}

.footer-brand img {
    filter: brightness(0) invert(1);
}

.footer-brand p,
.footer-end p {
    margin: 1rem 0 0;
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.78rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: 0.8rem;
}

.footer-end {
    text-align: right;
}

/* ============================================
   11. RESPONSIVE
============================================ */
@media (max-width: 900px) {
    .site-header {
        grid-template-columns: 1fr auto;
        min-height: 4.75rem;
        padding-block: 0.8rem;
    }

    .site-nav {
        order: 3;
        display: grid;
        width: 100%;
        padding-top: 0.8rem;
        grid-column: 1 / -1;
        grid-template-columns: repeat(3, 1fr);
        gap: 0;
    }

    .site-nav a {
        padding: 0.6rem 0.5rem;
        border-top: var(--rule);
        text-align: center;
    }

    .hero {
        min-height: calc(100svh - 7.5rem);
    }

    .hero-copy {
        grid-template-columns: 1fr;
    }

    .hero-copy > p,
    .line-action {
        max-width: 30rem;
        margin-top: 2rem;
        grid-column: 1;
    }

    .capabilities-intro {
        grid-template-columns: 1fr 1.4fr;
    }

    .capabilities-intro > p:last-child {
        grid-column: 2;
    }

    .rhythm-sequence {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 5rem;
    }

    .rhythm-sequence li:nth-child(2),
    .rhythm-sequence li:nth-child(4) {
        transform: translateY(3rem);
    }

    .rhythm-sequence li:nth-child(3) {
        transform: none;
    }

    .principles {
        min-height: auto;
        grid-template-columns: 1fr;
    }

    .principles-notes {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    :root {
        --gutter: 1.1rem;
        --section-space: 5.5rem;
    }

    html {
        scroll-padding-top: 8rem;
    }

    .site-logo {
        width: 9rem;
    }

    .header-contact span:first-child {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0 0 0 0);
    }

    .header-contact {
        width: 2.6rem;
        justify-content: center;
    }

    .site-nav a {
        font-size: 0.68rem;
    }

    .hero {
        min-height: 49rem;
        padding-top: 1.5rem;
    }

    .hero-note {
        display: none;
    }

    .shift-word {
        top: 36%;
        font-size: 23.5vw;
    }

    .shift-word-top {
        transform: translateX(-2.4vw);
    }

    .shift-word-bottom {
        transform: translateX(2.4vw);
    }

    .hero-copy {
        padding-top: 17rem;
    }

    .hero-copy h1 {
        font-size: clamp(3rem, 15vw, 4.8rem);
    }

    .section-heading,
    .capabilities-intro,
    .rhythm-heading,
    .contact-exit {
        grid-template-columns: 1fr;
    }

    .section-heading h2,
    .capabilities-intro h2,
    .rhythm-heading h2 {
        margin-top: 2.5rem;
    }

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

    .exchange-pivot {
        min-height: 5rem;
    }

    .exchange-pivot span {
        transform: rotate(90deg);
    }

    .exchange:hover .exchange-pivot span {
        transform: rotate(90deg) translateX(0.35rem);
    }

    .capabilities-intro > p:last-child {
        margin-top: 1rem;
        grid-column: 1;
    }

    .capability-matrix {
        grid-template-columns: 1fr;
        grid-template-rows: none;
    }

    .capability-a,
    .capability-b,
    .capability-c,
    .capability-d {
        min-height: 24rem;
        grid-column: 1;
    }

    .rhythm-sequence {
        display: block;
        margin-top: 4rem;
    }

    .rhythm-sequence li,
    .rhythm-sequence li:nth-child(2),
    .rhythm-sequence li:nth-child(3),
    .rhythm-sequence li:nth-child(4) {
        display: grid;
        min-height: 0;
        padding: 1.25rem 0;
        border-right: 0;
        grid-template-columns: 0.8fr 1.2fr;
        gap: 1rem;
        transform: none;
    }

    .rhythm-sequence p {
        margin: 0;
    }

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

    .principles-statement h2 {
        margin-top: 4rem;
        font-size: clamp(3rem, 14vw, 5.5rem);
    }

    .principles-notes {
        display: block;
    }

    .contact-exit h2 {
        margin-top: 4rem;
        font-size: clamp(4rem, 20vw, 6.7rem);
    }

    .email-exit {
        margin-top: 5rem;
    }

    .email-address {
        font-size: clamp(1.8rem, 9vw, 3rem);
    }

    .email-arrow {
        width: 3.75rem;
        margin-left: 0.75rem;
    }

    .site-footer {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.6rem;
    }

    .footer-end {
        text-align: left;
    }
}

@media (min-width: 1600px) {
    body {
        font-size: 1.08rem;
    }

    .site-header,
    .hero,
    .section-pad,
    .principles,
    .contact-exit,
    .site-footer {
        padding-inline: max(var(--gutter), calc((100vw - var(--max-width)) / 2));
    }
}

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

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