/* ==========================================================================
   Frederic Jasmin — Simplicity requires intelligence.
   One background, one ink, one accent. Hierarchy through type alone.
   ========================================================================== */

@font-face {
    font-family: 'Archivo';
    src: url('../fonts/Archivo-Variable.woff2') format('woff2');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Spline Sans Mono';
    src: url('../fonts/SplineSansMono-Variable.woff2') format('woff2');
    font-weight: 300 700;
    font-style: normal;
    font-display: swap;
}

/* ---------- Tokens ---------- */

:root {
    --bg: #fafaf8;
    --ink: #161616;
    --muted: #666666;
    --hairline: #e4e4e2;
    --accent: #1e4d31;

    --font-display: 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --font-mono: 'Spline Sans Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;

    --measure: 680px;
    color-scheme: light;
}

/* ---------- Base ---------- */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-display);
    font-size: 17px;
    line-height: 1.65;
    background: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
    text-wrap: balance;
}

p {
    text-wrap: pretty;
}

a {
    color: var(--ink);
}

img {
    max-width: 100%;
    height: auto;
}

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

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

.container {
    max-width: var(--measure);
    margin-inline: auto;
    padding-inline: clamp(1.25rem, 5vw, 2rem);
}

.skip-link {
    position: fixed;
    top: -100px;
    left: 1rem;
    z-index: 100;
    padding: 0.6rem 1.1rem;
    background: var(--bg);
    border: 1px solid var(--hairline);
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-decoration: none;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 1rem;
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ---------- Links & buttons ---------- */

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--hairline);
    padding-bottom: 2px;
    transition: border-color 0.15s;
}

.text-link:hover {
    border-color: var(--ink);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.15rem;
    border: 1px solid transparent;
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
    text-decoration: none;
    cursor: pointer;
    line-height: 1;
    white-space: nowrap;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s, opacity 0.15s;
}

.btn-primary {
    background: var(--ink);
    color: var(--bg);
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    background: transparent;
    border-color: var(--hairline);
    color: var(--ink);
}

.btn-secondary:hover {
    border-color: var(--ink);
}

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--bg);
    border-bottom: 1px solid var(--hairline);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    padding-block: 0.95rem;
}

.wordmark {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
    text-decoration: none;
    color: var(--ink);
    white-space: nowrap;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-left: auto;
}

.site-nav a {
    position: relative;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--muted);
    text-decoration: none;
    padding-block: 0.25rem;
    transition: color 0.15s;
}

.site-nav a:hover {
    color: var(--ink);
}

.site-nav a.is-active {
    color: var(--ink);
}

.site-nav .nav-cv {
    color: var(--ink);
}

.site-nav a.is-active::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -0.35rem;
    width: 4px;
    height: 4px;
    margin-left: -2px;
    border-radius: 50%;
    background: var(--accent);
}

.nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    margin-left: auto;
    background: none;
    border: 1px solid var(--hairline);
    border-radius: 2px;
    cursor: pointer;
    padding: 0;
}

.nav-toggle-bar {
    position: relative;
    width: 16px;
    height: 1px;
    background: var(--ink);
    transition: background-color 0.15s;
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
    content: '';
    position: absolute;
    left: 0;
    width: 16px;
    height: 1px;
    background: var(--ink);
    transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle-bar::before {
    top: -5px;
}

.nav-toggle-bar::after {
    top: 5px;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar {
    background: transparent;
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle[aria-expanded='true'] .nav-toggle-bar::after {
    top: 0;
    transform: rotate(-45deg);
}

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

/* ---------- Hero ---------- */

.hero {
    padding-block: clamp(4.5rem, 13vh, 8rem);
    scroll-margin-top: 5.5rem;
    text-align: center;
}

.hero-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    margin: 0 0 1.75rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    opacity: 0;
    animation: fade-in 0.5s ease 0.05s forwards;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

.hero-name {
    margin: 0 0 0.4em;
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.25rem, 9vw, 6rem);
    line-height: 1.02;
    letter-spacing: -0.035em;
    opacity: 0;
    animation: fade-in 0.5s ease 0.1s forwards;
}

.hero-thesis {
    margin: 0 auto 1.5rem;
    max-width: 30ch;
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.2rem, 2.4vw, 1.55rem);
    line-height: 1.4;
    letter-spacing: -0.01em;
    opacity: 0;
    animation: fade-in 0.5s ease 0.15s forwards;
}

.hero-role {
    margin: 0 0 2.25rem;
    font-size: 1rem;
    color: var(--muted);
    opacity: 0;
    animation: fade-in 0.5s ease 0.2s forwards;
}

.hero-role a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--hairline);
    transition: border-color 0.15s;
}

.hero-role a:hover {
    border-color: var(--ink);
}

.hero-cta {
    opacity: 0;
    animation: fade-in 0.5s ease 0.25s forwards;
}

@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ---------- Sections ---------- */

.section {
    padding-block: clamp(4.5rem, 10vh, 7.5rem);
    scroll-margin-top: 5.5rem;
    border-top: 1px solid var(--hairline);
}

.hero {
    border-top: none;
}

.section-title {
    margin: 0 0 1rem;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.75rem, 3.6vw, 2.5rem);
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.section-num {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.55em;
    letter-spacing: 0.04em;
    color: var(--muted);
    margin-right: 0.6em;
}

.section-lede {
    margin: 0 0 2.5rem;
    max-width: 58ch;
    font-size: 1.05rem;
    color: var(--muted);
}

.subsection-title {
    margin: 3rem 0 0.75rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ---------- Work index ---------- */

.work-index {
    border-top: 1px solid var(--hairline);
}

.work-row {
    display: grid;
    grid-template-columns: 3.5rem 1fr 240px;
    gap: 1.5rem;
    padding-block: 2.25rem;
    border-bottom: 1px solid var(--hairline);
}

.work-thumb {
    width: 240px;
    height: auto;
    display: block;
    align-self: center;
    border: 1px solid var(--hairline);
    border-radius: 2px;
}

.work-num {
    margin: 0;
    padding-top: 0.15rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
}

.work-title {
    margin: 0 0 0.4rem;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.3rem;
    line-height: 1.25;
    letter-spacing: -0.015em;
}

.work-desc {
    margin: 0 0 0.85rem;
    max-width: 55ch;
    font-size: 0.95rem;
    color: var(--muted);
}

.work-meta {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.work-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    column-gap: 1.5rem;
    row-gap: 0.75rem;
    margin-top: 1.1rem;
}

/* Case studies */

.case-study summary {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    user-select: none;
    list-style: none;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
    color: var(--muted);
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: color 0.15s, border-color 0.15s;
}

.case-study summary::-webkit-details-marker {
    display: none;
}

.case-study summary::before {
    content: '+';
    color: var(--ink);
    font-weight: 600;
    transition: transform 0.15s;
}

.case-study[open] summary::before {
    transform: rotate(45deg);
}

.case-study summary:hover {
    color: var(--ink);
    border-color: var(--ink);
}

.case-study-body {
    padding-top: 0.9rem;
    max-width: 55ch;
    font-size: 0.95rem;
    color: var(--muted);
}

.case-study-body p + p {
    margin-top: 0.6rem;
}

.case-study-body strong {
    color: var(--ink);
    font-weight: 600;
}

/* ---------- About ---------- */

.about-grid {
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 2.5rem;
    align-items: start;
}

.about-photo {
    width: 110px;
    height: 110px;
    object-fit: cover;
    border: 1px solid var(--hairline);
    border-radius: 2px;
}

.about-body p {
    margin: 0 0 1.1rem;
    max-width: 58ch;
    color: var(--muted);
    line-height: 1.7;
}

.about-body a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--hairline);
    transition: border-color 0.15s;
}

.about-body a:hover {
    border-color: var(--ink);
}

/* ---------- Ledger (experience, skills, education) ---------- */

.ledger {
    border-top: 1px solid var(--hairline);
}

.ledger-row {
    display: grid;
    grid-template-columns: minmax(120px, 170px) 1fr;
    gap: 1.5rem;
    padding-block: 1.35rem;
    border-bottom: 1px solid var(--hairline);
}

.ledger-key {
    margin: 0;
    padding-top: 0.1rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.ledger-value {
    margin: 0;
    font-size: 0.95rem;
}

.ledger-role {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.3;
}

.ledger-org {
    margin: 0.15rem 0 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
}

.ledger-detail {
    margin: 0.6rem 0 0;
    max-width: 52ch;
    font-size: 0.9rem;
    color: var(--muted);
}

/* Timeline rail */

.timeline {
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 1.5rem;
    bottom: 1.5rem;
    left: 5px;
    width: 1px;
    background: var(--hairline);
}

.timeline .ledger-row {
    position: relative;
    padding-left: 2.25rem;
}

.timeline .ledger-row::before {
    content: '';
    position: absolute;
    top: 1.5rem;
    left: 1px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    border: 1px solid var(--hairline);
    background: var(--bg);
}

.timeline .ledger-row--current::before {
    background: var(--accent);
    border-color: var(--accent);
}

/* ---------- Testimonials ---------- */

.testimonial {
    margin: 0 0 2.5rem;
}

.testimonial blockquote {
    margin: 0 0 0.75rem;
    max-width: 58ch;
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.1rem;
    line-height: 1.6;
    border-left: 2px solid var(--ink);
    padding-left: 1.5rem;
}

.testimonial-meta {
    margin: 0;
    padding-left: calc(1.5rem + 2px);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
}

.testimonial-meta strong {
    color: var(--ink);
    font-weight: 500;
}

/* ---------- Contact ---------- */

.contact-panel {
    margin-top: 0.5rem;
    padding-block: 0.5rem 1rem;
}

.contact-email {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.5rem, 4.5vw, 2.5rem);
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--ink);
    text-decoration: none;
    word-break: break-word;
    overflow-wrap: break-word;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s;
}

.contact-email:hover {
    border-color: var(--ink);
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-top: 1.75rem;
}

.contact-meta {
    margin: 1.75rem 0 0;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
}

.contact-social {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1rem;
}

.contact-social a {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--muted);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    padding-bottom: 2px;
    transition: color 0.15s, border-color 0.15s;
}

.contact-social a:hover {
    color: var(--ink);
    border-color: var(--ink);
}

/* ---------- Footer ---------- */

.site-footer {
    padding-block: 2rem;
    border-top: 1px solid var(--hairline);
}

.site-footer p {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
}

/* ---------- Reveal on scroll ---------- */

.reveal {
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 0.45s ease, transform 0.45s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 820px) {
    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        margin-left: 0;
        padding: 0.5rem clamp(1.25rem, 5vw, 2rem) 1rem;
        background: var(--bg);
        border-bottom: 1px solid var(--hairline);
    }

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

    .site-nav a {
        padding-block: 0.75rem;
        border-bottom: 1px solid var(--hairline);
    }

    .site-nav a:last-child {
        border-bottom: none;
    }

    .site-nav a.is-active::after {
        display: none;
    }
}

@media (max-width: 900px) {
    .work-row {
        grid-template-columns: 3.5rem 1fr 200px;
        gap: 1.25rem;
    }

    .work-thumb {
        width: 200px;
    }
}

@media (max-width: 640px) {
    .work-row {
        grid-template-columns: 2.5rem 1fr;
        gap: 1rem 0.75rem;
    }

    .work-thumb {
        grid-column: 1 / -1;
        width: 100%;
        height: auto;
        justify-self: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .ledger-row {
        grid-template-columns: 1fr;
        gap: 0.35rem;
    }
}

/* ---------- Reduced motion ---------- */

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

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

    .hero-meta,
    .hero-name,
    .hero-thesis,
    .hero-role,
    .hero-cta,
    .reveal {
        opacity: 1 !important;
        transform: none !important;
    }
}