:root {
    --ink: #1b1d2a;
    --muted: #5a5f73;
    --rule: #dcdce8;
    --paper: #f7f7fb;
    --accent: #4338ca;
    --nav-bg: rgba(247, 247, 251, 0.93);
    --surface: #fff;
    --btn-bg: #4338ca;
    --btn-hover: #3328a8;
    --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    color-scheme: light;
}

/* Dark mode: follows the OS setting unless the toggle sets data-theme on <html>.
   Screen only, so Save as PDF always stays light. */
@media screen and (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --ink: #e6e7ef;
        --muted: #a0a5ba;
        --rule: #2b2d3c;
        --paper: #111219;
        --accent: #a5b4fc;
        --nav-bg: rgba(17, 18, 25, 0.9);
        --surface: #1c1d28;
        --btn-bg: #4f46e5;
        --btn-hover: #4338ca;
        color-scheme: dark;
    }
}
@media screen {
    :root[data-theme="dark"] {
        --ink: #e6e7ef;
        --muted: #a0a5ba;
        --rule: #2b2d3c;
        --paper: #111219;
        --accent: #a5b4fc;
        --nav-bg: rgba(17, 18, 25, 0.9);
        --surface: #1c1d28;
        --btn-bg: #4f46e5;
        --btn-hover: #4338ca;
        color-scheme: dark;
    }
}

.theme-toggle {
    flex: none;
    min-height: 2.25rem;
    font: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--muted);
    background: none;
    border: 1px solid var(--rule);
    border-radius: 999px;
    padding: 0.1rem 0.75rem;
    cursor: pointer;
    white-space: nowrap;
}
.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
}
nav .langs {
    display: flex;
    flex: none;
    gap: 0.6rem;
    align-items: center;
}
nav .langs a {
    font-size: 0.85rem;
    padding: 0.4rem 0.1rem;
}

nav .langs a[aria-current="page"] {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 4px;
}
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 1rem/1.6 var(--sans);
}

a {
    color: var(--accent);
    text-underline-offset: 3px;
}
a:hover {
    text-decoration-thickness: 2px;
}

:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

.skip {
    position: absolute;
    left: -999px;
}
.skip:focus {
    left: 1rem;
    top: 1rem;
    z-index: 9;
    background: var(--surface);
    padding: 0.5rem 1rem;
}
.wrap {
    width: min(100% - 2.5rem, 56rem);
    margin-inline: auto;
}

nav {
    position: sticky;
    top: 0;
    z-index: 5;
    background: var(--nav-bg);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--rule);
}
nav .wrap {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem 1.4rem;
    padding: 0.6rem 0;
}
.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem 1.4rem;
}
.nav-tools {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    margin-left: auto;
}
.menu-toggle {
    display: none;
    align-items: center;
    gap: 0.4rem;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink);
    background: none;
    border: 1px solid var(--rule);
    border-radius: 6px;
    padding: 0.35rem 0.75rem;
    min-height: 2.25rem;
    cursor: pointer;
}
.menu-toggle span {
    font-size: 1.05rem;
    line-height: 1;
}
.menu-toggle:hover,
.menu-toggle[aria-expanded="true"] {
    color: var(--accent);
    border-color: var(--accent);
}
nav a {
    white-space: nowrap;
    color: var(--muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}
nav a:hover {
    color: var(--accent);
}

.hero {
    padding: clamp(3rem, 9vw, 6rem) 0 2.5rem;
}

h1 {
    font: 600 clamp(2.7rem, 9vw, 4.8rem) / 1 var(--serif);
    letter-spacing: -0.025em;
    margin: 0;
}
.role {
    font: italic 1.4rem/1.3 var(--serif);
    color: var(--accent);
    margin: 0.7rem 0 1.2rem;
}
.lead {
    max-width: 38rem;
    font-size: 1.1rem;
    margin: 0 0 1.5rem;
}
.links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1.4rem;
    align-items: center;
    margin: 0 0 2rem;
    padding: 0;
    list-style: none;
    font-weight: 600;
}
.btn {
    font: inherit;
    font-weight: 600;
    background: var(--btn-bg);
    color: #fff;
    border: 0;
    border-radius: 6px;
    padding: 0.55rem 1.05rem;
    cursor: pointer;
    display: inline-block;
    text-decoration: none;
}
.btn:hover {
    background: var(--btn-hover);
    color: #fff;
}
.facts {
    display: grid;
    grid-template-columns: 9rem 1fr;
    gap: 0.35rem 1.25rem;
    margin: 0;
    padding-top: 1.25rem;
    border-top: 1px solid var(--rule);
}
.facts dt {
    color: var(--muted);
}
.facts dd {
    margin: 0;
}
.print-only {
    display: none;
}

section.wrap {
    padding: 2.5rem 0;
    border-top: 1px solid var(--rule);
    scroll-margin-top: 3rem;
}
h2 {
    font: 600 1.75rem/1.2 var(--serif);
    margin: 0 0 1.5rem;
}
.about p {
    max-width: 40rem;
    margin: 0 0 1rem;
}

.row {
    display: grid;
    grid-template-columns: 11.5rem 1fr;
    gap: 0.25rem 2rem;
    padding: 1.35rem 0;
    border-top: 1px solid var(--rule);
}
h2 + .row {
    border-top: 0;
    padding-top: 0;
}
.when {
    color: var(--muted);
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
}
.where {
    display: block;
    color: var(--ink);
    font-weight: 600;
    margin-top: 0.2rem;
}
h3 {
    font: 600 1.2rem/1.3 var(--serif);
    margin: 0;
}
.meta {
    color: var(--muted);
    margin: 0.15rem 0 0.6rem;
}
.b {
    margin: 0 0 0.6rem;
    padding-left: 1.1rem;
}
.b li {
    margin: 0.25rem 0;
}
.b li::marker {
    color: var(--accent);
}
.stack {
    margin: 0.55rem 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}
.stack b {
    color: var(--ink);
}
.proj {
    margin-top: 1.1rem;
    padding-left: 1rem;
    border-left: 2px solid var(--rule);
}
.proj h4 {
    margin: 0;
    font-size: 1rem;
}
.proj h4 span {
    color: var(--muted);
    font-weight: 400;
    font-size: 0.9rem;
    margin-left: 0.4rem;
}
.proj p {
    margin: 0.2rem 0;
}

dl.k {
    display: grid;
    grid-template-columns: 11.5rem 1fr;
    gap: 0.7rem 2rem;
    margin: 0;
}
dl.k dt {
    font-weight: 600;
}
dl.k dd {
    margin: 0;
}
dl.k dd small {
    color: var(--muted);
    font-size: 0.92rem;
}

footer.wrap {
    border-top: 1px solid var(--rule);
    padding: 2rem 0 3rem;
    color: var(--muted);
    font-size: 0.92rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.75rem 1.5rem;
}

/* Mobile / narrow: collapse the section links behind the Menu button.
   Only when JS is running (html.js), so links stay visible without JS. */
@media (max-width: 820px) {
    .js .menu-toggle {
        display: inline-flex;
    }
    .js .nav-links {
        display: none;
        order: 3;
        flex-basis: 100%;
        flex-direction: column;
        gap: 0;
        margin-top: 0.15rem;
        border-top: 1px solid var(--rule);
    }
    .js nav.open .nav-links {
        display: flex;
    }
    .js .nav-links a {
        padding: 0.7rem 0;
        font-size: 1rem;
        border-bottom: 1px solid var(--rule);
    }
    .js .nav-links a:last-child {
        border-bottom: 0;
    }
    section.wrap {
        scroll-margin-top: 3.5rem;
    }
}
@media (max-width: 400px) {
    .nav-tools {
        gap: 0.6rem;
    }
    nav .langs {
        gap: 0.45rem;
    }
    .theme-toggle .lbl {
        display: none;
    }
    .theme-toggle {
        padding: 0.1rem 0.6rem;
    }
}

@media (max-width: 640px) {
    .row,
    dl.k {
        grid-template-columns: 1fr;
    }
    .facts {
        grid-template-columns: 7rem 1fr;
    }
    /* Languages stay side by side: language | level */
    #languages dl.k {
        grid-template-columns: max-content 1fr;
        gap: 0.5rem 1.5rem;
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* Print / Save as PDF: compact layout to fit 2 (A4) pages */
@media print {
    @page {
        size: A4;
        margin: 11mm 12mm;
    }
    html {
        font-size: 9pt;
    }
    body {
        background: #fff;
        font-size: 1rem;
        line-height: 1.38;
    }
    /* French and German run ~10-15% longer: tighten slightly to keep 2 pages */
    html:lang(fr),
    html:lang(de) {
        font-size: 8.6pt;
    }
    html:lang(fr) body,
    html:lang(de) body {
        line-height: 1.33;
    }
    nav,
    .links,
    .skip,
    footer.wrap {
        display: none;
    }
    .wrap {
        width: 100%;
    }
    .print-only {
        display: block;
        margin: 0.2rem 0 0;
        color: var(--muted);
        font-size: 0.9rem;
    }
    .hero {
        padding: 0 0 0.4rem;
    }
    h1 {
        font-size: 22pt;
    }
    .role {
        font-size: 11.5pt;
        margin: 0.2rem 0 0.35rem;
    }
    .lead {
        max-width: none;
        font-size: 1rem;
        margin: 0 0 0.25rem;
    }
    .facts {
        grid-template-columns: auto 1fr auto 1fr;
        gap: 0.1rem 1rem;
        margin-top: 0.25rem;
        padding-top: 0.35rem;
    }
    .facts dt:nth-of-type(n + 3),
    .facts dd:nth-of-type(n + 3) {
        display: none;
    }
    section.wrap {
        padding: 0.45rem 0;
        break-inside: auto;
    }
    /* short sections stay whole; long ones may split between rows */
    #about,
    #education,
    #languages {
        break-inside: avoid;
    }
    dl.k dt {
        break-after: avoid;
    }
    dl.k dd {
        break-inside: avoid;
    }
    h2 {
        font-size: 11.5pt;
        margin: 0 0 0.35rem;
        break-after: avoid;
    }
    h3 {
        font-size: 10.5pt;
        break-after: avoid;
    }
    .about p {
        max-width: none;
        margin: 0 0 0.25rem;
    }
    .row {
        grid-template-columns: 7.6rem 1fr;
        gap: 0.1rem 0.9rem;
        padding: 0.3rem 0;
        break-inside: avoid;
    }
    .row.long {
        break-inside: auto;
    }
    .when {
        font-size: 0.85rem;
    }
    .meta {
        margin: 0 0 0.2rem;
    }
    .b {
        margin: 0 0 0.15rem;
    }
    .b li {
        margin: 0.05rem 0;
    }
    .stack {
        font-size: 0.85rem;
        margin: 0.15rem 0 0;
    }
    .proj {
        margin-top: 0.3rem;
        padding-left: 0.6rem;
        border-left-width: 1px;
        break-inside: avoid;
    }
    .proj h4,
    .proj p {
        display: inline;
    }
    .proj h4 span {
        margin: 0 0 0 0.25rem;
    }
    .proj h4 span::before {
        content: "(";
    }
    .proj h4 span::after {
        content: "):";
    }
    .proj p.stack {
        margin: 0 0 0 0.3rem;
    }
    dl.k {
        gap: 0.12rem 0.9rem;
    }
    #skills dl.k {
        grid-template-columns: 7.6rem 1fr;
    }
    #education dl.k,
    #certifications dl.k {
        grid-template-columns: 3.6rem 1fr;
    }
    #certifications dd br {
        display: none;
    }
    #certifications dd small::before {
        content: " – ";
    }
    #certifications > p {
        display: none;
    }
    #languages dl.k {
        grid-template-columns: none;
        grid-template-rows: auto auto;
        grid-auto-flow: column;
        grid-auto-columns: auto;
        justify-content: start;
        gap: 0.05rem 2rem;
    }
    a {
        color: inherit;
        text-decoration: none;
    }
}