/* Local assets only: system fonts, CSS decoration, and accessible native links. */
:root {
    color-scheme: dark;
    --ink: #091719;
    --surface: #102326;
    --surface-raised: #163034;
    --text: #edf5f3;
    --muted: #b5cbc7;
    --accent: #86e8cc;
    --line: #34545a;
    --focus: #ffe296;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
    box-sizing: border-box;
}

html {
    background: var(--ink);
    scroll-padding-block-start: 1.5rem;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--ink);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
    overflow-wrap: anywhere;
}

h1, h2, h3, p {
    margin-block: 0;
}

h1, h2, h3 {
    line-height: 1.2;
    text-wrap: balance;
}

a {
    color: var(--accent);
    text-underline-offset: 0.22em;
    text-decoration-thickness: 0.08em;
}

a:hover {
    text-decoration-thickness: 0.14em;
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 5px;
}

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

.container {
    width: min(100% - 3rem, 76rem);
    margin-inline: auto;
}

.skip-link {
    position: absolute;
    z-index: 10;
    inset-block-start: 1rem;
    inset-inline-start: 1rem;
    padding: 0.75rem 1rem;
    color: var(--ink);
    background: var(--focus);
    border-radius: 0.3rem;
    font-weight: 700;
    transform: translateY(calc(-100% - 2rem));
}

.skip-link:focus {
    transform: none;
}

.header {
    padding-block: clamp(3.5rem, 8vw, 7rem) clamp(2.5rem, 6vw, 5rem);
    border-block-start: 5px solid var(--accent);
    background: radial-gradient(ellipse at 95% 0%, #173c3c 0, transparent 65%);
}

.eyebrow {
    margin-block-end: 1.25rem;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.logo {
    max-width: 19ch;
    font-size: 3.5rem;
    font-weight: 750;
    letter-spacing: -0.05em;
    line-height: 1.04;
}

.subtitle {
    max-width: 42ch;
    margin-block-start: 1.75rem;
    color: var(--text);
    font-size: 1.25rem;
    line-height: 1.45;
}

.tagline {
    max-width: 65ch;
    margin-block-start: 1rem;
    color: var(--muted);
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-block-start: 2rem;
}

.hero-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 44px;
    padding: 0.7rem 1.15rem;
    border: 1px solid var(--accent);
    border-radius: 0.35rem;
    color: var(--accent);
    font-weight: 650;
    text-decoration: none;
}

.hero-link:first-child {
    color: var(--ink);
    background: var(--accent);
}

.hero-link:hover {
    color: var(--ink);
    background: var(--text);
    border-color: var(--text);
    text-decoration: underline;
}

.nav {
    border-block: 1px solid var(--line);
    background: var(--surface);
}

.nav .container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.25rem;
    padding-block: 0.5rem;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.5rem 0.25rem;
    color: var(--text);
    font-weight: 600;
    text-decoration: none;
}

.nav-link:hover {
    color: var(--accent);
    text-decoration: underline;
}

.section {
    padding-block: clamp(3.5rem, 7vw, 6rem);
    scroll-margin-block-start: 1.5rem;
}

.section-dark {
    background: var(--surface);
    border-block: 1px solid var(--line);
}

.section-title {
    max-width: 28ch;
    font-size: 2.25rem;
    letter-spacing: -0.035em;
}

.section-description,
.section-intro {
    max-width: 72ch;
    margin-block-start: 1.25rem;
    color: var(--muted);
    font-size: 1.0625rem;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    min-height: 44px;
    padding: 0.5rem 0.25rem;
    font-weight: 600;
}

.flow-diagram {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin: 2.5rem 0 0;
    padding: 1.5rem;
    border: 1px solid var(--line);
    border-radius: 0.6rem;
    background: var(--surface);
    list-style: none;
}

.flow-step {
    flex: 1 1 6.5rem;
    min-width: 0;
    max-width: 13rem;
    text-align: center;
}

.flow-node {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 3.25rem;
    padding: 0.65rem 0.55rem;
    border: 1px solid var(--line);
    border-radius: 0.35rem;
    background: var(--surface-raised);
    color: var(--accent);
    font-size: 0.875rem;
    font-weight: 650;
    line-height: 1.35;
}

.flow-label {
    margin-block-start: 0.65rem;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.flow-arrow {
    flex: 0 0 auto;
    color: var(--accent);
    font-size: 1.25rem;
    line-height: 1;
}

.diagram-grid {
    display: grid;
    gap: 1.5rem;
    margin-block-start: 2.5rem;
}

.diagram-card {
    min-width: 0;
    margin: 0;
    padding: clamp(1rem, 3vw, 2rem);
    border: 1px solid var(--line);
    border-radius: 0.6rem;
    background: var(--ink);
}

.diagram-card h3 {
    font-size: 1.125rem;
}

.diagram-content {
    margin-block-start: 1.5rem;
}

.diagram-content svg {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
}

.diagram-content svg text {
    fill: var(--text);
    /* Keep long labels inside the existing fixed-width diagram nodes. */
    font-family: var(--font-sans);
}

.diagram-caption {
    max-width: 75ch;
    margin-block-start: 1.25rem;
    color: var(--muted);
    font-size: 0.9375rem;
}

.project-shortcuts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
    gap: 0.5rem 2rem;
    margin-block: 1.5rem 0;
    padding-inline-start: 1.25rem;
}

.project-shortcuts li::marker {
    color: var(--accent);
}

.project-shortcuts a,
.repo-links a {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    max-width: 100%;
    min-height: 44px;
    padding: 0.5rem 0.25rem;
    font-weight: 600;
}

.repos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: 1.25rem;
    margin-block-start: 2.5rem;
}

.repo-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    scroll-margin-block-start: 1.5rem;
    padding: 1.5rem;
    border: 1px solid var(--line);
    border-radius: 0.6rem;
    background: var(--surface);
    color: var(--text);
    text-decoration: none;
}

.repo-card:focus-within,
.repo-card:target {
    border-color: var(--accent);
}

.repo-header {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.75rem;
}

.repo-header h3 {
    flex: 1 1 14rem;
    min-width: 0;
    color: var(--accent);
    font-size: 1.125rem;
    line-height: 1.4;
}

.repo-badge {
    padding: 0.2rem 0.55rem;
    border: 1px solid var(--line);
    border-radius: 0.25rem;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    line-height: 1.5;
}

.repo-description {
    margin-block: 1.25rem 1.5rem;
    color: var(--muted);
    font-size: 0.9375rem;
}

.repo-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-block-start: auto;
}

.repo-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 0.75rem;
    margin-block-start: 1rem;
    padding-block-start: 1rem;
    border-block-start: 1px solid var(--line);
    font-size: 0.9375rem;
}

.tag {
    padding: 0.25rem 0.55rem;
    border-radius: 0.25rem;
    background: var(--surface-raised);
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.6875rem;
    line-height: 1.5;
}

.footer {
    padding-block: 2rem;
    border-block-start: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.875rem;
}

.footer .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 2rem;
}

.footer a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding-block: 0.5rem;
}

@media (max-width: 47.99rem) {
    .container {
        width: calc(100% - 2rem);
    }

    .nav .container {
        gap: 0.25rem 1rem;
    }

    .flow-diagram {
        flex-direction: column;
        flex-wrap: nowrap;
        gap: 0.85rem;
    }

    .flow-step {
        flex: none;
        width: min(100%, 20rem);
        max-width: none;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .repo-card {
        padding: 1.25rem;
    }
}

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

    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}

@media (forced-colors: active) {
    .repo-card,
    .flow-node,
    .hero-link,
    .diagram-card {
        border-color: ButtonText;
    }

    .repo-card:focus-within,
    .repo-card:target {
        border-color: Highlight;
    }

    .diagram-content {
        background: Canvas;
    }

    .diagram-content svg rect {
        fill: Canvas;
        stroke: CanvasText;
    }

    .diagram-content svg text,
    .diagram-content svg marker polygon {
        fill: CanvasText;
    }

    .diagram-content svg line,
    .diagram-content svg path {
        stroke: CanvasText;
    }

    :focus-visible {
        outline-color: Highlight;
    }
}

@media print {
    :root {
        color-scheme: light;
        --ink: #ffffff;
        --surface: #ffffff;
        --surface-raised: #f2f2f2;
        --text: #111111;
        --muted: #333333;
        --accent: #145447;
        --line: #888888;
    }

    body {
        font-size: 10pt;
    }

    .container {
        width: 100%;
    }

    .header,
    .section,
    .footer {
        padding-block: 1.5rem;
        background: none;
    }

    .logo {
        font-size: 30pt;
    }

    .section-title {
        font-size: 18pt;
    }

    h1, h2, h3,
    .section-description,
    .section-intro {
        break-after: avoid;
    }

    .section-description,
    .section-intro {
        margin-block-start: 6pt;
        font-size: 10pt;
    }

    .nav,
    .skip-link,
    .hero-links,
    .project-shortcuts {
        display: none;
    }

    .repo-card,
    .diagram-card,
    .flow-step,
    #overview,
    #architecture {
        break-inside: avoid;
    }

    .repos-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10pt;
        margin-block-start: 12pt;
    }

    .repo-card {
        padding: 10pt;
    }

    .repo-header h3 {
        font-size: 12pt;
    }

    .repo-description {
        margin-block: 6pt 8pt;
        font-size: 10pt;
    }

    .repo-links {
        display: block;
        margin-block-start: 8pt;
        padding-block-start: 6pt;
        font-size: 9pt;
    }

    .repo-links a {
        display: block;
        min-height: 0;
        padding: 3pt 0;
    }

    /* Make repository and documentation destinations usable on paper. */
    .repo-links a[href^="https://"]::after {
        display: block;
        content: attr(href);
        font-size: 8.5pt;
        font-weight: 400;
        line-height: 1.4;
    }

    .flow-diagram {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 8pt;
        margin-block-start: 12pt;
        padding: 8pt;
        break-inside: avoid;
        counter-reset: workflow-stage;
    }

    .flow-step {
        width: auto;
        max-width: none;
        counter-increment: workflow-stage;
    }

    .flow-node {
        min-height: 0;
        padding: 6pt;
        font-size: 9pt;
    }

    .flow-node::before {
        content: counter(workflow-stage) ".\00a0";
    }

    .flow-label {
        margin-block-start: 4pt;
        font-size: 8pt;
    }

    .flow-arrow {
        display: none;
    }

    .diagram-grid {
        margin-block-start: 12pt;
    }

    /* Keep the diagram legible even when printed backgrounds are disabled. */
    .diagram-content {
        background: none;
    }

    .diagram-content svg rect {
        fill: #ffffff;
        stroke: #111111;
    }

    .diagram-content svg text,
    .diagram-content svg marker polygon {
        fill: #111111;
    }

    .diagram-content svg line,
    .diagram-content svg path {
        stroke: #111111;
    }

    a {
        text-decoration: underline;
    }
}