:root {
    --color-black: #000000;
    --color-ink: #1a1c1c;
    --color-muted: #5e5e5e;
    --color-copy: #525252;
    --color-subtle: #a8a29e;
    --color-orange: #f58331;
    --color-bg: #f9f9f8;
    --color-panel: #f3f4f3;
    --color-border: #d8d9d8;
    --color-rule: #e2e2e2;
    --font-main: "Inter", Arial, sans-serif;
    --max-page: 1280px;
    --section-padding-x: 128px;
    --section-padding-y: 48px;
    --header-height: 96px;
    --hero-min-height: calc(100vh - var(--header-height));
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-main);
    font-size: 18px;
    line-height: 1.6;
}

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

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

h1,
h2,
h3,
h4,
p,
figure,
dl,
dd,
ol {
    margin: 0;
}

ol {
    padding: 0;
    list-style: none;
}

.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;
}

.site-header,
.site-footer {
    width: 100%;
    background: #ffffff;
    border-color: var(--color-black);
    border-style: solid;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
    padding: 24px 64px 24px;
    border-width: 0 0 1px;
}

.site-logo {
    display: inline-flex;
    align-items: center;
    color: var(--color-black);
    font-size: 20px;
    font-weight: 800;
    line-height: 1.4;
    letter-spacing: 0.05em;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.site-nav a,
.footer-nav a {
    color: var(--color-subtle);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 180ms ease, border-color 180ms ease;
}

.site-nav a {
    padding-bottom: 6px;
    border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
    color: var(--color-black);
    border-color: var(--color-black);
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 15px 32px;
    border: 1px solid var(--color-black);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 0.1em;
    text-align: center;
    text-transform: uppercase;
    transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

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

.button--dark {
    background: var(--color-black);
    color: #ffffff;
}

.button--dark:hover,
.button--dark:focus-visible {
    background: var(--color-orange);
    border-color: var(--color-orange);
}

.button--outline {
    background: #ffffff;
    color: var(--color-black);
    padding: 9px 17px;
    min-height: 36px;
    font-weight: 400;
}

.button--outline:hover,
.button--outline:focus-visible {
    background: var(--color-black);
    color: #ffffff;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 1px solid var(--color-black);
    background: #ffffff;
    cursor: pointer;
}

.nav-toggle__line {
    display: block;
    width: 100%;
    height: 2px;
    margin: 5px 0;
    background: var(--color-black);
    transition: transform 180ms ease, opacity 180ms ease;
}

.section {
    position: relative;
    width: 100%;
    max-width: var(--max-page);
    margin: 0 auto;
    padding: var(--section-padding-y) var(--section-padding-x);
}

main > .section:not(.hero) {
    z-index: 2;
    background: var(--color-bg);
}

main > .section--panel:not(.hero) {
    background: transparent;
}

.section--panel {
    isolation: isolate;
}

.section--panel::before {
    position: absolute;
    inset: 0 50%;
    z-index: -1;
    width: 100vw;
    margin-left: -50vw;
    background: var(--color-panel);
    content: "";
}

.section-heading {
    width: 100%;
    margin-bottom: 64px;
    text-align: center;
}

.section-heading h2,
.feature-row h2,
.timeline-section h2 {
    color: var(--color-ink);
    font-size: 48px;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero {
    z-index: 1;
    display: flex;
    min-height: var(--hero-min-height);
    align-items: center;
    justify-content: center;
    padding: 96px 64px;
    text-align: center;
}

.hero__inner {
    display: flex;
    max-width: 896px;
    flex-direction: column;
    align-items: center;
}

.hero h1 {
    max-width: 840px;
    color: var(--color-ink);
    font-size: 72px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

.hero__quote {
    max-width: 768px;
    margin: 32px 0;
    color: var(--color-muted);
    font-size: 32px;
    font-weight: 600;
    line-height: 1.3;
}

#solution {
    margin-top: -200px;
}

.feature-row {
    display: flex;
    align-items: flex-start;
    gap: 64px;
}

.feature-row__content {
    display: flex;
    flex: 1 1 0;
    min-width: 0;
    flex-direction: column;
    justify-content: center;
    padding-top: 16px;
}

.feature-row__content > p:not(.eyebrow) {
    max-width: 620px;
    margin-top: 14px;
    color: var(--color-muted);
}

.eyebrow {
    color: var(--color-orange);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.feature-row .eyebrow {
    margin-bottom: 8px;
}

.spec-list {
    width: 100%;
    margin-top: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--color-black);
}

.spec-list div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 8px 0 9px;
    border-bottom: 1px solid var(--color-rule);
}

.spec-list dt,
.spec-list dd {
    font-size: 16px;
    line-height: 1.6;
}

.spec-list dt {
    color: var(--color-ink);
}

.spec-list dd {
    color: var(--color-muted);
    text-align: right;
}

.image-card {
    flex: 0 0 400px;
    width: 400px;
    aspect-ratio: 1;
    overflow: visible;
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-card--right {
    box-shadow: 16px -16px 0 var(--color-ink);
}

.image-card--left {
    box-shadow: -16px -16px 0 var(--color-ink);
}

.text-link {
    display: inline-flex;
    align-self: flex-start;
    margin-top: 24px;
    padding-bottom: 3px;
    border-bottom: 1px solid var(--color-black);
    color: var(--color-ink);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.curriculum,
.business,
.team {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.curriculum-grid {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 64px;
}

.curriculum-track {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.curriculum-track h3,
.timeline__item h3 {
    color: var(--color-ink);
    font-size: 32px;
    font-weight: 600;
    line-height: 1.3;
}

.lesson-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.lesson-list li {
    display: flex;
    align-items: flex-start;
    gap: 24px;
}

.lesson-list span {
    flex: 0 0 auto;
    color: var(--color-orange);
    font-size: 32px;
    font-weight: 600;
    line-height: 1.3;
}

.lesson-list h4 {
    margin-top: 7px;
    color: var(--color-ink);
    font-size: 12px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.lesson-list p {
    margin-top: 7px;
    color: rgba(26, 28, 28, 0.7);
    font-size: 16px;
    line-height: 1.6;
}

.business-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    width: 100%;
}

.business-step {
    display: flex;
    width: 244px;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.business-step__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 96px;
    height: 96px;
    margin-bottom: 32px;
    border-radius: 999px;
    background: var(--color-ink);
    filter: drop-shadow(0 4px 3px rgba(0, 0, 0, 0.25));
}

.business-step__icon img {
    width: 40px;
    height: 40px;
}

.business-step h3 {
    color: var(--color-ink);
    font-size: 20px;
    font-weight: 400;
    line-height: 1.4;
}

.business-step p {
    max-width: 250px;
    margin-top: 8px;
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.45;
}

.business-flow__arrow {
    width: 24px;
    height: 24px;
}

.business-loop {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
    padding: 50px;
    border: 2px dashed var(--color-border);
    border-radius: 48px;
}

.business-loop__mark {
    width: 36px;
    height: 36px;
    margin-block: auto;
    object-fit: contain;
}

.timeline-section {
    max-width: 896px;
    padding-right: 64px;
    padding-left: 64px;
}

.timeline {
    position: relative;
    display: flex;
    min-height: 524px;
    flex-direction: column;
    justify-content: space-between;
    border-left: 1px solid var(--color-black);
}

.timeline__item {
    position: relative;
    padding-left: 64px;
}

.timeline__item::before {
    position: absolute;
    top: 6px;
    left: -9px;
    width: 16px;
    height: 16px;
    border: 1px solid var(--color-black);
    border-radius: 50%;
    background: var(--color-bg);
    content: "";
}

.timeline__item--current::before {
    background: var(--color-orange);
}

.timeline__item--final::before {
    background: var(--color-black);
}

.timeline__item h3 {
    margin-top: 7px;
}

.timeline__item p:not(.eyebrow) {
    max-width: 680px;
    margin-top: 7px;
    color: var(--color-muted);
}

.timeline__item--final .eyebrow {
    color: var(--color-orange);
}

.team-grid {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 96px;
    padding: 0 48px;
}

.team-card {
    display: flex;
    min-width: 0;
    flex-direction: column;
    align-items: center;
}

.team-card__portrait {
    width: 200px;
    height: 250px;
    margin-bottom: 13px;
    overflow: hidden;
    box-shadow: -16px -16px 0 var(--color-ink);
}

.team-card__portrait img {
    width: 125%;
    height: 100%;
    max-width: none;
    margin-left: -12.5%;
    object-fit: cover;
}

.team-card h3 {
    width: 100%;
    color: var(--color-black);
    font-size: 20px;
    font-weight: 400;
    line-height: 1.8;
}

.team-card .eyebrow {
    width: 100%;
}

.team-card p:not(.eyebrow) {
    width: 100%;
    margin-top: 5px;
    color: var(--color-copy);
    font-size: 16px;
    line-height: 1.5;
}

.site-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 48px 64px;
    border-width: 1px 0 0;
}

.footer-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.footer-nav a {
    color: #78716c;
    font-weight: 400;
    letter-spacing: 0.2em;
}

.site-footer p {
    color: #78716c;
    font-size: 10px;
    line-height: 1.6;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

@media (max-width: 1180px) {
    :root {
        --section-padding-x: 72px;
    }

    .site-header {
        padding-right: 36px;
        padding-left: 36px;
    }

    .site-nav {
        gap: 18px;
    }

    .image-card {
        flex-basis: 340px;
        width: 340px;
    }

    .business-flow,
    .business-loop {
        gap: 20px;
    }

    .business-loop {
        padding: 36px;
    }

    .team-grid {
        gap: 56px;
        padding: 0 16px;
    }
}

@media (max-width: 1024px) {
    :root {
        --section-padding-x: 48px;
    }

    body {
        font-size: 17px;
    }

    .header-cta {
        display: none;
    }

    .hero h1 {
        font-size: 60px;
    }

    .hero__quote {
        font-size: 26px;
    }

    .feature-row {
        gap: 48px;
    }

    .section-heading h2,
    .feature-row h2,
    .timeline-section h2 {
        font-size: 42px;
    }

    .business-flow {
        flex-direction: column;
    }

    .business-flow__arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding-x: 24px;
        --section-padding-y: 34px;
        --header-height: 76px;
    }

    body {
        font-size: 16px;
    }

    .site-header {
        min-height: var(--header-height);
        padding: 12px 20px;
    }

    .nav-toggle {
        position: relative;
        z-index: 30;
        display: block;
    }

    .nav-open .nav-toggle__line:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .nav-open .nav-toggle__line:nth-child(2) {
        opacity: 0;
    }

    .nav-open .nav-toggle__line:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .site-nav {
        position: fixed;
        inset: var(--header-height) 0 auto;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 18px 20px;
        border-bottom: 1px solid var(--color-black);
        background: #ffffff;
    }

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

    .site-nav a {
        padding: 13px 0;
        border-bottom: 1px solid var(--color-rule);
        color: var(--color-ink);
    }

    .hero,
    .timeline-section,
    .business {
        padding: var(--section-padding-y) var(--section-padding-x);
    }

    .hero h1 {
        font-size: 38px;
        letter-spacing: -0.03em;
    }

    .hero__quote {
        margin: 18px 0 22px;
        font-size: 18px;
    }

    #solution {
        margin-top: -128px;
    }

    .feature-row,
    .feature-row--reverse {
        flex-direction: column;
        gap: 30px;
    }

    .feature-row--reverse .image-card {
        order: 2;
    }

    .feature-row--reverse .feature-row__content {
        order: 1;
    }

    .feature-row__content {
        width: 100%;
    }

    .image-card {
        flex: none;
        width: min(100%, 320px);
        align-self: center;
    }

    .image-card--right,
    .image-card--left,
    .team-card__portrait {
        box-shadow: 12px -12px 0 var(--color-ink);
    }

    .section-heading {
        margin-bottom: 30px;
    }

    .section-heading h2,
    .feature-row h2,
    .timeline-section h2 {
        font-size: 30px;
    }

    .curriculum-grid,
    .team-grid {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .team-grid {
        padding: 0 32px;
    }

    .team-card__portrait {
        width: 160px;
        height: 200px;
    }

    .business-step__icon {
        width: 72px;
        height: 72px;
        margin-bottom: 20px;
    }

    .business-step__icon img {
        width: 30px;
        height: 30px;
    }

    .business-step h3 {
        font-size: 18px;
    }

    .business-step p {
        font-size: 13px;
    }

    .business-loop {
        flex-direction: column;
        align-items: center;
        width: 100%;
        max-width: 360px;
        padding: 26px 18px;
        border-radius: 36px;
    }

    .business-loop__mark {
        width: 26px;
        height: 26px;
        margin: 0;
    }

    .timeline {
        border-left: 0;
        min-height: auto;
        gap: 46px;
    }

    .timeline::before {
        position: absolute;
        top: 8px;
        bottom: 8px;
        left: 0;
        width: 1px;
        background: var(--color-black);
        content: "";
    }

    .timeline__item {
        padding-left: 30px;
    }

    .timeline__item p:not(.eyebrow) {
        font-size: 16px;
    }

    .site-footer {
        flex-direction: column;
        align-items: flex-start;
        padding: 34px 24px;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: flex-start;
    }
}

@media (max-width: 640px) {
    :root {
        --section-padding-x: 20px;
        --section-padding-y: 30px;
    }

    .hero h1 {
        font-size: 34px;
    }

    .hero__quote {
        font-size: 16px;
    }

    .section-heading h2,
    .feature-row h2,
    .timeline-section h2 {
        font-size: 28px;
    }

    .curriculum-track h3,
    .timeline__item h3 {
        font-size: 24px;
    }

    .lesson-list li {
        gap: 16px;
    }

    .lesson-list span {
        font-size: 24px;
    }

    .spec-list div {
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
    }

    .spec-list dd {
        text-align: left;
    }

    .business-step {
        width: 100%;
    }

    .team-grid {
        padding: 0 28px;
    }

    .timeline {
        gap: 38px;
    }

    .timeline__item {
        padding-left: 24px;
    }
}