@layer reset, base, components, layout, motion;

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

    html {
        scroll-behavior: smooth;
    }

    body,
    h1,
    h2,
    h3,
    p,
    ol,
    ul {
        margin: 0;
    }

    ol,
    ul {
        padding: 0;
    }

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

    a {
        color: inherit;
    }
}

@layer base {
    :root {
        --blue-50: #f1f8fd;
        --blue-100: #dceefb;
        --blue-500: #159de0;
        --blue-600: #087ebc;
        --blue-800: #174e72;
        --ink-950: #172c3a;
        --ink-800: #29495e;
        --ink-650: #48677a;
        --line: #d7e4eb;
        --paper: #fbfdfe;
        --surface: #f4f9fc;
        --surface-raised: #fdfefe;
        --focus: #e68a00;
        --module-accent: var(--blue-500);
        --module-accent-soft: var(--blue-100);
        --font-body: "Lato", "Segoe UI", sans-serif;
        --font-display: Georgia, "Times New Roman", serif;
        --space-1: 0.25rem;
        --space-2: 0.5rem;
        --space-3: 0.75rem;
        --space-4: 1rem;
        --space-6: 1.5rem;
        --space-8: 2rem;
        --space-12: 3rem;
        --space-16: 4rem;
        --space-24: 6rem;
        --shell: 74rem;
        --reading-measure: 68ch;
        --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    }

    .module-page--01 {
        --module-accent: #168fd0;
        --module-accent-soft: #dceff9;
    }

    .module-page--02 {
        --module-accent: #4aa92f;
        --module-accent-soft: #e4f3df;
    }

    .module-page--03 {
        --module-accent: #dd8500;
        --module-accent-soft: #f9ead2;
    }

    .module-page--04 {
        --module-accent: #396dbb;
        --module-accent-soft: #e0e9f7;
    }

    @supports (color: oklch(50% 0.1 250)) {
        :root {
            --blue-50: oklch(97.5% 0.015 240);
            --blue-100: oklch(92.5% 0.04 240);
            --blue-500: oklch(65% 0.15 240);
            --blue-600: oklch(56% 0.145 240);
            --blue-800: oklch(39% 0.08 240);
            --ink-950: oklch(25% 0.035 240);
            --ink-800: oklch(38% 0.045 240);
            --ink-650: oklch(51% 0.035 240);
            --line: oklch(89% 0.025 240);
            --paper: oklch(99% 0.006 240);
            --surface: oklch(97% 0.018 240);
            --surface-raised: oklch(99.5% 0.004 240);
            --focus: oklch(70% 0.17 70);
        }

        .module-page--01 {
            --module-accent: oklch(63% 0.15 240);
            --module-accent-soft: oklch(93% 0.04 240);
        }

        .module-page--02 {
            --module-accent: oklch(65% 0.15 140);
            --module-accent-soft: oklch(94% 0.04 140);
        }

        .module-page--03 {
            --module-accent: oklch(70% 0.16 70);
            --module-accent-soft: oklch(94% 0.045 70);
        }

        .module-page--04 {
            --module-accent: oklch(56% 0.13 255);
            --module-accent-soft: oklch(93% 0.035 255);
        }
    }

    body {
        min-width: 20rem;
        color: var(--ink-800);
        background: var(--paper);
        font-family: var(--font-body);
        font-size: 1rem;
        font-kerning: normal;
        line-height: 1.65;
        text-rendering: optimizeLegibility;
    }

    h1,
    h2,
    h3 {
        color: var(--ink-950);
        line-height: 1.12;
    }

    h1,
    h2 {
        font-family: var(--font-display);
        font-weight: 700;
        letter-spacing: -0.035em;
    }

    h1 {
        max-width: 12ch;
        font-size: clamp(3.25rem, 11vw, 7.5rem);
    }

    .module-page--04 h1 {
        font-size: clamp(3.25rem, 7.2vw, 6.5rem);
    }

    h2 {
        max-width: 19ch;
        font-size: clamp(2rem, 6vw, 3.4rem);
    }

    h3 {
        font-size: 1.125rem;
        font-weight: 700;
        letter-spacing: -0.012em;
    }

    p,
    li {
        max-width: var(--reading-measure);
    }

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

    ::selection {
        color: var(--ink-950);
        background: var(--module-accent-soft);
    }
}

@layer components {
    .skip-link {
        position: fixed;
        top: var(--space-3);
        left: var(--space-3);
        z-index: 400;
        padding: var(--space-3) var(--space-4);
        color: var(--paper);
        background: var(--ink-950);
        font-weight: 700;
        text-decoration: none;
        transform: translateY(calc(-100% - 2rem));
        transition: transform 180ms var(--ease-out);
    }

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

    .module-shell {
        width: min(100% - clamp(2rem, 8vw, 7rem), var(--shell));
        margin-inline: auto;
    }

    .eyebrow,
    .section-number,
    .section-index > p {
        color: var(--blue-600);
        font-size: 0.75rem;
        font-weight: 800;
        letter-spacing: 0.16em;
        line-height: 1.4;
        text-transform: uppercase;
    }

    .back-link,
    .text-link {
        display: inline-flex;
        min-height: 2.75rem;
        align-items: center;
        gap: var(--space-2);
        color: var(--blue-800);
        font-size: 0.875rem;
        font-weight: 800;
        text-decoration: none;
    }

    .back-link span,
    .text-link span {
        transition: transform 220ms var(--ease-out);
    }

    .button {
        display: inline-flex;
        min-height: 3rem;
        align-items: center;
        justify-content: center;
        gap: var(--space-2);
        padding: 0.75rem 1.25rem;
        border: 1px solid transparent;
        border-radius: 0.25rem;
        font-size: 0.875rem;
        font-weight: 800;
        line-height: 1.2;
        text-align: center;
        text-decoration: none;
        transition:
            color 180ms var(--ease-out),
            background-color 180ms var(--ease-out),
            border-color 180ms var(--ease-out),
            transform 180ms var(--ease-out);
    }

    .button--primary {
        color: var(--paper);
        background: var(--blue-600);
    }

    .button--quiet {
        color: var(--blue-800);
        border-color: var(--line);
        background: transparent;
    }

    .button--light {
        color: var(--blue-800);
        background: var(--paper);
    }

    .site-header {
        position: relative;
        z-index: 200;
        border-top: 0.25rem solid var(--module-accent);
        border-bottom: 1px solid var(--line);
        background: var(--paper);
    }

    .site-header__inner {
        display: flex;
        width: min(100% - clamp(1.5rem, 8vw, 7rem), var(--shell));
        min-height: 5.5rem;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-4);
        margin-inline: auto;
    }

    .brand {
        display: inline-flex;
        flex: 0 0 auto;
        align-items: center;
    }

    .brand img {
        width: 7.25rem;
        height: auto;
    }

    .site-nav {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: clamp(0.25rem, 2vw, 1.5rem);
    }

    .site-nav a {
        display: inline-flex;
        min-height: 2.75rem;
        align-items: center;
        padding-inline: clamp(0.4rem, 1.5vw, 0.75rem);
        color: var(--ink-800);
        font-size: 0.875rem;
        font-weight: 700;
        text-decoration: none;
        transition: color 180ms var(--ease-out);
    }

    .site-nav .site-nav__login {
        min-width: 4.75rem;
        justify-content: center;
        border: 1px solid var(--blue-600);
        border-radius: 0.25rem;
        color: var(--blue-800);
    }

    .module-hero__visual {
        position: relative;
        width: min(78vw, 22rem);
        aspect-ratio: 1;
        justify-self: center;
        border-radius: 50%;
        background: var(--module-accent-soft);
        overflow: hidden;
        isolation: isolate;
    }

    .module-hero__visual::before {
        position: absolute;
        inset: 14%;
        z-index: -1;
        border-radius: 50%;
        background: var(--paper);
        content: "";
    }

    .module-orbit {
        position: absolute;
        border: 1px solid var(--module-accent);
        border-radius: 50%;
        opacity: 0.55;
        transform: rotate(-24deg);
    }

    .module-orbit--outer {
        inset: 7% -27%;
    }

    .module-orbit--middle {
        inset: 19% -18%;
    }

    .module-orbit--inner {
        inset: 31% -8%;
    }

    .module-hero__number {
        position: absolute;
        top: 50%;
        left: 50%;
        color: var(--ink-950);
        font-family: var(--font-display);
        font-size: clamp(4.5rem, 16vw, 8rem);
        line-height: 1;
        transform: translate(-50%, -55%);
    }

    .module-hero__caption {
        position: absolute;
        right: 0;
        bottom: 13%;
        left: 0;
        color: var(--blue-800);
        font-size: 0.6875rem;
        font-weight: 800;
        letter-spacing: 0.14em;
        text-align: center;
        text-transform: uppercase;
    }

    .module-cycle {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        list-style: none;
        border-top: 1px solid var(--line);
    }

    .module-cycle li {
        position: relative;
        padding: var(--space-4) var(--space-2) var(--space-4) 0;
        color: var(--ink-650);
        font-size: 0.75rem;
        font-weight: 700;
        line-height: 1.35;
    }

    .module-cycle li::before {
        position: absolute;
        top: -2px;
        left: 0;
        width: 0;
        height: 3px;
        background: var(--module-accent);
        content: "";
        transition: width 400ms var(--ease-out);
    }

    .module-cycle li.is-current {
        color: var(--ink-950);
    }

    .module-cycle li.is-current::before {
        width: min(70%, 8rem);
    }

    .module-cycle span {
        display: block;
        margin-bottom: var(--space-1);
        color: var(--module-accent);
        font-variant-numeric: tabular-nums;
    }

    .section-index {
        display: none;
    }

    .section-index nav {
        display: grid;
        margin-top: var(--space-4);
        border-top: 1px solid var(--line);
    }

    .section-index a {
        display: flex;
        min-height: 2.75rem;
        align-items: center;
        border-bottom: 1px solid var(--line);
        color: var(--ink-650);
        font-size: 0.8125rem;
        font-weight: 700;
        text-decoration: none;
        transition: color 180ms var(--ease-out);
    }

    .content-section {
        padding-block: clamp(3rem, 9vw, 6rem);
        border-top: 1px solid var(--line);
        scroll-margin-top: var(--space-8);
    }

    .content-section:first-child {
        padding-top: 0;
        border-top: 0;
    }

    .content-section h2 {
        margin-top: var(--space-3);
    }

    .content-section > p:not(.section-number) {
        margin-top: var(--space-6);
        font-size: 1.0625rem;
    }

    .content-section .lead {
        color: var(--ink-950);
        font-size: clamp(1.2rem, 2.5vw, 1.5rem);
        line-height: 1.55;
    }

    .content-section--statement {
        position: relative;
    }

    .content-section--statement::after {
        display: block;
        width: 4.5rem;
        height: 0.25rem;
        margin-top: var(--space-12);
        background: var(--module-accent);
        content: "";
    }

    .feature-list {
        display: grid;
        gap: var(--space-3);
        margin-top: var(--space-8);
        list-style: none;
    }

    .feature-list li {
        position: relative;
        padding-left: 1.75rem;
    }

    .feature-list li::before {
        position: absolute;
        top: 0.72em;
        left: 0;
        width: 0.55rem;
        height: 0.55rem;
        border: 2px solid var(--module-accent);
        border-radius: 50%;
        content: "";
        transform: translateY(-50%);
    }

    .feature-list--detailed {
        gap: 0;
        border-top: 1px solid var(--line);
    }

    .feature-list--detailed li {
        padding-block: var(--space-6);
        padding-left: 2rem;
        border-bottom: 1px solid var(--line);
    }

    .feature-list strong {
        color: var(--ink-950);
    }

    .step-list {
        display: grid;
        gap: 0;
        margin-top: var(--space-8);
        list-style: none;
        border-top: 1px solid var(--line);
    }

    .step-list li {
        display: grid;
        grid-template-columns: 2.5rem 1fr;
        gap: var(--space-4);
        padding-block: var(--space-8);
        border-bottom: 1px solid var(--line);
    }

    .step-list__number {
        color: var(--module-accent);
        font-size: 0.75rem;
        font-weight: 800;
        font-variant-numeric: tabular-nums;
        letter-spacing: 0.12em;
    }

    .step-list p {
        margin-top: var(--space-3);
    }

    .module-closing {
        color: var(--blue-100);
        background: var(--blue-800);
    }

    .module-closing .eyebrow {
        color: var(--module-accent-soft);
    }

    .module-closing h2 {
        margin-top: var(--space-3);
        color: var(--paper);
    }

    .module-closing__actions {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: var(--space-4) var(--space-6);
    }

    .module-closing .text-link {
        color: var(--paper);
    }

    .site-footer {
        color: var(--ink-650);
        background: var(--surface);
    }

    .site-footer__inner {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: var(--space-2) var(--space-8);
        padding-block: var(--space-8);
        font-size: 0.8125rem;
    }

    .site-footer__inner p:first-child {
        color: var(--ink-950);
        font-weight: 800;
        letter-spacing: 0.06em;
        text-transform: uppercase;
    }
}

@layer layout {
    .module-hero {
        position: relative;
        background:
            linear-gradient(90deg, var(--surface) 1px, transparent 1px) 0 0 / 4rem 4rem,
            var(--paper);
        overflow: hidden;
    }

    .module-hero__grid {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        gap: clamp(2.5rem, 8vw, 5rem);
        padding-block: clamp(3.5rem, 10vw, 7rem) var(--space-8);
    }

    .module-hero__copy {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }

    .module-hero__copy .eyebrow {
        margin-top: var(--space-8);
    }

    .module-hero__copy h1 {
        margin-top: var(--space-3);
    }

    .module-hero__summary {
        width: 100%;
        max-width: min(100%, 40rem);
        margin-top: var(--space-6);
        color: var(--ink-650);
        font-size: clamp(1.125rem, 2.4vw, 1.4rem);
        line-height: 1.55;
        overflow-wrap: anywhere;
    }

    .module-hero__actions {
        display: flex;
        flex-wrap: wrap;
        gap: var(--space-3);
        margin-top: var(--space-8);
    }

    .module-detail {
        background: var(--surface-raised);
    }

    .module-detail__grid {
        padding-block: clamp(4rem, 10vw, 8rem);
    }

    .module-closing__inner {
        display: grid;
        gap: var(--space-8);
        padding-block: clamp(3.5rem, 9vw, 6rem);
    }

    @media (max-width: 41.99rem) {
        .site-header__inner {
            display: grid;
            justify-items: center;
            padding-block: var(--space-3);
        }

        .brand img {
            width: 6.5rem;
        }

        .site-nav {
            width: 100%;
            justify-content: center;
        }

        .module-hero__copy {
            width: calc(100vw - 2rem);
            max-width: calc(100vw - 2rem);
            min-width: 0;
        }

        .module-hero__summary {
            width: calc(100vw - 2rem);
            max-width: calc(100vw - 2rem);
        }
    }

    @media (min-width: 42rem) {
        .brand img {
            width: 7.25rem;
        }

        .site-nav {
            gap: var(--space-4);
        }

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

        .module-cycle li {
            padding-right: var(--space-4);
        }

        .module-closing__inner {
            grid-template-columns: minmax(0, 1.2fr) minmax(15rem, 0.8fr);
            align-items: end;
        }

        .module-closing__actions {
            justify-content: flex-end;
        }
    }

    @media (min-width: 54rem) {
        .site-header {
            position: sticky;
            top: 0;
        }

        .module-hero__grid {
            grid-template-columns: minmax(0, 1.15fr) minmax(17rem, 0.85fr);
            align-items: center;
        }

        .module-cycle {
            grid-column: 1 / -1;
        }

        .module-detail__grid {
            display: grid;
            grid-template-columns: minmax(10rem, 14rem) minmax(0, 1fr);
            gap: clamp(3rem, 8vw, 7rem);
            align-items: start;
        }

        .section-index {
            position: sticky;
            top: 8rem;
            display: block;
        }

        .module-article {
            min-width: 0;
        }

        .content-section:first-child {
            padding-top: 0;
        }
    }

    @media (min-width: 70rem) {
        .module-hero__visual {
            width: 25rem;
            margin-left: 2rem;
        }

        .module-hero__copy {
            padding-left: clamp(0rem, 3vw, 2rem);
        }
    }
}

@layer motion {
    @media (hover: hover) {
        .site-nav a:hover,
        .section-index a:hover {
            color: var(--blue-600);
        }

        .button:hover {
            transform: translateY(-2px);
        }

        .button--primary:hover {
            background: var(--blue-800);
        }

        .button--quiet:hover {
            border-color: var(--blue-600);
            background: var(--blue-50);
        }

        .back-link:hover span {
            transform: translateX(-0.25rem);
        }

        .text-link:hover span {
            transform: translateX(0.25rem);
        }
    }

    .module-hero__copy {
        animation: reveal-copy 650ms var(--ease-out) both;
    }

    .module-hero__visual {
        animation: reveal-visual 750ms 100ms var(--ease-out) both;
    }

    .module-cycle {
        animation: reveal-copy 600ms 220ms var(--ease-out) both;
    }

    @keyframes reveal-copy {
        from {
            opacity: 0;
            transform: translateY(1rem);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @keyframes reveal-visual {
        from {
            opacity: 0;
            transform: scale(0.96) rotate(-2deg);
        }

        to {
            opacity: 1;
            transform: scale(1) rotate(0);
        }
    }

    @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;
        }
    }
}