:root {
    --background: #f5f1e8;
    --surface: #fbf9f4;
    --text: #292a27;
    --muted-text: #77766e;
    --border-color: #d8d1c4;
    --link-color: #292a27;
    --focus-color: #3d5c72;
    --motif-color: #a7a092;
    --motif-strong: #687b78;
    --content-max-width: 76rem;
    --text-measure: 66ch;
    --page-gutter: clamp(1.25rem, 4vw, 4.5rem);
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: clamp(2rem, 5vw, 4rem);
    --space-5: clamp(4rem, 11vw, 9rem);
    --font-body: system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-heading: system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    --font-size-small: 0.78rem;
}

* { box-sizing: border-box; }

html { background: var(--background); overflow-x: clip; }

body {
    background: var(--background);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    margin: 0;
    overflow-x: clip;
}

h1, h2, h3 {
    font-family: var(--font-heading);
    line-height: 1.08;
    margin: 0 0 var(--space-2);
}

h1 { font-size: clamp(2.7rem, 8vw, 6.5rem); letter-spacing: -0.065em; max-width: 12ch; }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
p { margin: 0 0 var(--space-2); max-width: var(--text-measure); }

a {
    color: var(--link-color);
    font-weight: 700;
    text-decoration: underline;
    text-decoration-thickness: 0.1em;
    text-underline-offset: 0.16em;
}

a:hover { text-underline-offset: 0.23em; }
a:focus-visible, button:focus-visible { outline: 0.2rem solid var(--focus-color); outline-offset: 0.25rem; }

.site-shell { display: flex; flex-direction: column; min-height: 100vh; }
.site-header, .site-footer {
    align-items: baseline;
    display: flex;
    gap: var(--space-3);
    justify-content: space-between;
    margin: 0 auto;
    max-width: var(--content-max-width);
    padding: var(--space-3) var(--page-gutter);
    width: 100%;
}
.site-header { border-bottom: 1px solid var(--border-color); }
.brand { color: var(--text); font-size: 1.35rem; letter-spacing: -0.06em; text-decoration: none; }
.site-nav { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; }
.site-nav a { min-height: 2.4rem; }
.site-nav a.active { text-decoration-thickness: 0.18em; }
main { flex: 1; }
.site-footer { border-top: 1px solid var(--border-color); color: var(--muted-text); }
.site-footer p, .site-footer a { margin: 0; }
.footer-links { display: flex; gap: var(--space-3); }

.skip-link {
    background: var(--surface);
    color: var(--text);
    left: var(--page-gutter);
    padding: var(--space-1) var(--space-2);
    position: absolute;
    top: 0;
    transform: translateY(-150%);
    z-index: 10;
}
.skip-link:focus { transform: translateY(var(--space-1)); }

.hero, .home-projects, .home-note, .page-section {
    margin: 0 auto;
    max-width: var(--content-max-width);
    padding-left: var(--page-gutter);
    padding-right: var(--page-gutter);
}
.hero {
    align-items: center;
    display: grid;
    gap: var(--space-4);
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 1fr);
    min-height: min(46rem, 74vh);
    padding-bottom: var(--space-5);
    padding-top: var(--space-5);
}
.hero__content { position: relative; z-index: 1; }
.hero__intro, .page-intro { font-size: clamp(1.05rem, 1.6vw, 1.25rem); max-width: 42ch; }
.eyebrow {
    color: var(--muted-text);
    font-family: var(--font-mono);
    font-size: var(--font-size-small);
    letter-spacing: 0.08em;
    margin-bottom: var(--space-2);
}
.text-link { display: inline-block; margin-top: var(--space-1); }
.text-link span:last-child, .project-card__link span:last-child { display: inline-block; transition: transform 180ms ease; }
.text-link:hover span:last-child, .text-link:focus-visible span:last-child, .project-card__link:hover span:last-child { transform: translate(0.15rem, -0.15rem); }

.home-projects { padding-bottom: var(--space-5); }
.section-heading { align-items: baseline; border-bottom: 1px solid var(--border-color); display: flex; gap: var(--space-4); justify-content: space-between; padding-bottom: var(--space-2); }
.section-heading h2 { margin: 0; }
.project-list--all { margin-top: var(--space-4); }
.home-note, .page-copy { padding-bottom: var(--space-5); padding-top: var(--space-4); }
.home-note { border-top: 1px solid var(--border-color); }
.home-note p { color: var(--muted-text); }
.page-section { max-width: 62rem; padding-bottom: var(--space-5); padding-top: var(--space-5); }
.page-heading { border-bottom: 1px solid var(--border-color); padding-bottom: var(--space-4); }
.page-heading h1 { max-width: none; }
.page-copy { max-width: 48rem; }
.page-copy h1 { margin-bottom: var(--space-4); }
.page-copy p { font-size: 1.1rem; }

.project-filter { display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; margin-top: var(--space-4); }
.project-filter button {
    background: transparent;
    border: 0;
    color: var(--muted-text);
    cursor: pointer;
    font: 700 var(--font-size-small)/1.4 var(--font-mono);
    letter-spacing: 0.04em;
    padding: 0.4rem 0;
    text-transform: uppercase;
}
.project-filter button span { font-weight: 400; }
.project-filter button.is-selected { color: var(--text); text-decoration: underline; text-underline-offset: 0.25em; }
.filter-summary { color: var(--muted-text); font-family: var(--font-mono); font-size: var(--font-size-small); margin-top: var(--space-3); }

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

#blazor-error-ui { background: var(--surface); border-top: 1px solid var(--border-color); bottom: 0; display: none; padding: var(--space-2) var(--page-gutter); position: fixed; width: 100%; z-index: 1000; }

@media (max-width: 48rem) {
    .hero { display: block; min-height: 0; padding-bottom: var(--space-4); }
    .hero h1 { font-size: clamp(2.7rem, 13vw, 5rem); }
    .section-heading { display: block; }
    .section-heading h2 { margin-top: var(--space-1); }
}

@media (max-width: 38rem) {
    .site-header, .site-footer { align-items: flex-start; flex-direction: column; gap: var(--space-2); }
}

@media (prefers-reduced-motion: reduce) {
    .text-link span:last-child, .project-card__link span:last-child { transition: none; }
}

@media (forced-colors: active) {
    :root { --background: Canvas; --surface: Canvas; --text: CanvasText; --muted-text: CanvasText; --border-color: ButtonText; --focus-color: Highlight; }
    .lab-grid { display: none; }
}