/* ==========================================================================
   arthurgarnier.fr — Material 3 inspired, dependency-free stylesheet
   ========================================================================== */

/* ---------- Design tokens (light) ---------- */
:root {
    --primary: #4355b9;
    --on-primary: #ffffff;
    --primary-container: #dee0ff;
    --on-primary-container: #00105c;
    --secondary-container: #e0e1f9;
    --on-secondary-container: #181a2c;
    --tertiary: #75546f;
    --surface: #fbf8ff;
    --surface-dim: #f3f0f9;
    --surface-container-low: #f5f2fb;
    --surface-container: #efedf6;
    --surface-container-high: #e9e7f0;
    --on-surface: #1b1b21;
    --on-surface-variant: #46464f;
    --outline: #767680;
    --outline-variant: #c6c5d0;
    --success: #1e8e3e;

    --terminal-bg: #1b1b26;
    --terminal-fg: #e3e1ec;

    --shadow-1: 0 1px 2px rgba(0, 0, 0, .08), 0 1px 3px 1px rgba(0, 0, 0, .05);
    --shadow-2: 0 1px 2px rgba(0, 0, 0, .1), 0 2px 6px 2px rgba(0, 0, 0, .06);
    --shadow-3: 0 4px 8px 3px rgba(0, 0, 0, .08), 0 1px 3px rgba(0, 0, 0, .1);

    --radius-s: 8px;
    --radius-m: 12px;
    --radius-l: 16px;
    --radius-xl: 28px;
    --radius-full: 999px;

    --font-sans: "Roboto Flex", Roboto, system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;

    --ease: cubic-bezier(.2, 0, 0, 1);
    --bar-h: 64px;

    color-scheme: light;
}

/* ---------- Design tokens (dark) ---------- */
:root[data-theme="dark"] {
    --primary: #bac3ff;
    --on-primary: #0c2287;
    --primary-container: #293ca0;
    --on-primary-container: #dee0ff;
    --secondary-container: #444559;
    --on-secondary-container: #e0e1f9;
    --tertiary: #e4bad9;
    --surface: #121318;
    --surface-dim: #121318;
    --surface-container-low: #1b1b21;
    --surface-container: #1f1f25;
    --surface-container-high: #292a2f;
    --on-surface: #e4e1e9;
    --on-surface-variant: #c6c5d0;
    --outline: #90909a;
    --outline-variant: #46464f;
    --success: #6dd58c;

    --terminal-bg: #0b0b12;

    --shadow-1: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px 1px rgba(0, 0, 0, .25);
    --shadow-2: 0 1px 2px rgba(0, 0, 0, .4), 0 2px 6px 2px rgba(0, 0, 0, .25);
    --shadow-3: 0 4px 8px 3px rgba(0, 0, 0, .3), 0 1px 3px rgba(0, 0, 0, .4);

    color-scheme: dark;
}

/* Follow the OS when the user hasn't picked a theme (works even without JS) */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --primary: #bac3ff;
        --on-primary: #0c2287;
        --primary-container: #293ca0;
        --on-primary-container: #dee0ff;
        --secondary-container: #444559;
        --on-secondary-container: #e0e1f9;
        --tertiary: #e4bad9;
        --surface: #121318;
        --surface-dim: #121318;
        --surface-container-low: #1b1b21;
        --surface-container: #1f1f25;
        --surface-container-high: #292a2f;
        --on-surface: #e4e1e9;
        --on-surface-variant: #c6c5d0;
        --outline: #90909a;
        --outline-variant: #46464f;
        --success: #6dd58c;
        --terminal-bg: #0b0b12;
        --shadow-1: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px 1px rgba(0, 0, 0, .25);
        --shadow-2: 0 1px 2px rgba(0, 0, 0, .4), 0 2px 6px 2px rgba(0, 0, 0, .25);
        --shadow-3: 0 4px 8px 3px rgba(0, 0, 0, .3), 0 1px 3px rgba(0, 0, 0, .4);
        color-scheme: dark;
    }
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--bar-h) + 16px);
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--on-surface);
    background: var(--surface);
    -webkit-font-smoothing: antialiased;
    transition: background-color .3s var(--ease), color .3s var(--ease);
}

h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { display: block; }

a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
    border-radius: var(--radius-s);
}

.container {
    width: 100%;
    max-width: 1120px;
    margin-inline: auto;
    padding-inline: 24px;
}

.icon { width: 20px; height: 20px; fill: currentColor; flex-shrink: 0; }

.skip-link {
    position: absolute;
    left: 16px;
    top: -100px;
    z-index: 100;
    padding: 12px 20px;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: var(--on-primary);
    font-weight: 500;
    text-decoration: none;
}
.skip-link:focus { top: 12px; }

/* ---------- Top app bar ---------- */
.top-bar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 50;
    height: var(--bar-h);
    background: color-mix(in srgb, var(--surface) 80%, transparent);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid transparent;
    transition: background-color .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.top-bar.is-scrolled {
    background: color-mix(in srgb, var(--surface-container) 88%, transparent);
    border-bottom-color: var(--outline-variant);
}

.top-bar__inner {
    height: 100%;
    max-width: 1120px;
    margin-inline: auto;
    padding-inline: 16px 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--on-surface);
    text-decoration: none;
    font-weight: 600;
    letter-spacing: -.01em;
    margin-right: auto;
}
.brand__mark {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-m);
    background: var(--primary);
    color: var(--on-primary);
    font-size: .875rem;
    font-weight: 700;
    letter-spacing: .02em;
}
.brand__name { font-size: 1.05rem; }

.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__link {
    display: inline-flex;
    align-items: center;
    height: 40px;
    padding-inline: 16px;
    border-radius: var(--radius-full);
    color: var(--on-surface-variant);
    font-size: .9rem;
    font-weight: 500;
    text-decoration: none;
    transition: background-color .2s var(--ease), color .2s var(--ease);
}
.nav__link:hover { background: color-mix(in srgb, var(--on-surface) 8%, transparent); color: var(--on-surface); }
.nav__link.is-active { background: var(--secondary-container); color: var(--on-secondary-container); }
.nav__sep { width: 1px; height: 24px; margin-inline: 8px; background: var(--outline-variant); }

.top-bar__actions { display: flex; align-items: center; gap: 4px; }

.icon-btn {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 0;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--on-surface-variant);
    cursor: pointer;
    transition: background-color .2s var(--ease);
}
.icon-btn:hover { background: color-mix(in srgb, var(--on-surface) 8%, transparent); }
.icon-btn .icon { width: 24px; height: 24px; }

/* theme icon swap */
.icon--sun { display: none; }
:root[data-theme="dark"] .icon--sun { display: block; }
:root[data-theme="dark"] .icon--moon { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .icon--sun { display: block; }
    :root:not([data-theme="light"]) .icon--moon { display: none; }
}
/* Theme toggle requires JS */
.no-js #theme-toggle { display: none; }

.nav-toggle { display: none; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding-inline: 24px 28px;
    border-radius: var(--radius-full);
    font-size: .95rem;
    font-weight: 500;
    letter-spacing: .01em;
    text-decoration: none;
    transition: box-shadow .2s var(--ease), background-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(.98); }

.btn--filled { background: var(--primary); color: var(--on-primary); }
.btn--filled:hover { box-shadow: var(--shadow-1); background: color-mix(in srgb, var(--primary) 92%, var(--on-primary)); }

.btn--tonal { background: var(--secondary-container); color: var(--on-secondary-container); }
.btn--tonal:hover { box-shadow: var(--shadow-1); background: color-mix(in srgb, var(--secondary-container) 92%, var(--on-secondary-container)); }

/* ---------- Hero ---------- */
.hero {
    position: relative;
    overflow: hidden;
    min-height: min(100svh, 860px);
    display: flex;
    align-items: center;
    padding: calc(var(--bar-h) + 48px) 0 72px;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(60% 50% at 85% 20%, color-mix(in srgb, var(--primary) 22%, transparent) 0%, transparent 70%),
        radial-gradient(50% 50% at 10% 90%, color-mix(in srgb, var(--tertiary) 18%, transparent) 0%, transparent 70%),
        var(--surface);
}
.hero__bg::after {
    /* subtle dotted grid */
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(color-mix(in srgb, var(--on-surface) 12%, transparent) 1px, transparent 1px);
    background-size: 24px 24px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}

.hero__grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    align-items: center;
    gap: 56px;
}

.hero__grid > *,
.about__grid > *,
.contact > * { min-width: 0; }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px 6px 12px;
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-full);
    background: color-mix(in srgb, var(--surface-container-low) 70%, transparent);
    color: var(--on-surface-variant);
    font-family: var(--font-mono);
    font-size: .8rem;
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success);
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--success) 60%, transparent);
    animation: pulse 2.4s infinite;
}
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--success) 55%, transparent); }
    70% { box-shadow: 0 0 0 8px transparent; }
    100% { box-shadow: 0 0 0 0 transparent; }
}

.hero__title {
    margin-top: 24px;
    font-size: clamp(2.6rem, 6vw, 4.25rem);
    line-height: 1.05;
    font-weight: 700;
    letter-spacing: -.035em;
}
.hero__role {
    display: block;
    margin-top: 14px;
    font-size: clamp(1.15rem, 2.2vw, 1.5rem);
    line-height: 1.3;
    font-weight: 500;
    letter-spacing: -.01em;
    color: var(--primary);
}
.hero__lead {
    margin-top: 24px;
    max-width: 56ch;
    font-size: 1.075rem;
    color: var(--on-surface-variant);
}
.hero__lead strong { color: var(--on-surface); font-weight: 600; }

.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 32px; }
.chip {
    display: inline-flex;
    align-items: center;
    height: 32px;
    padding-inline: 14px;
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius-s);
    color: var(--on-surface-variant);
    font-size: .85rem;
    font-weight: 500;
    background: color-mix(in srgb, var(--surface) 60%, transparent);
}

/* Terminal card */
.terminal {
    border-radius: var(--radius-l);
    background: var(--terminal-bg);
    color: var(--terminal-fg);
    box-shadow: var(--shadow-3), 0 30px 60px -20px color-mix(in srgb, var(--primary) 35%, transparent);
    overflow: hidden;
    transform: perspective(1200px) rotateY(-6deg) rotateX(3deg);
    transition: transform .6s var(--ease);
}
.terminal:hover { transform: none; }
.terminal__bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: rgba(255, 255, 255, .04);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.terminal__dot { width: 12px; height: 12px; border-radius: 50%; background: #ff5f57; }
.terminal__dot:nth-child(2) { background: #febc2e; }
.terminal__dot:nth-child(3) { background: #28c840; }
.terminal__title {
    margin-left: auto;
    margin-right: auto;
    padding-right: 52px;
    font-family: var(--font-mono);
    font-size: .75rem;
    opacity: .6;
}
.terminal__body {
    margin: 0;
    padding: 20px 24px 24px;
    font-family: var(--font-mono);
    font-size: .875rem;
    line-height: 1.75;
    overflow-x: auto;
}
.t-prompt { color: #8ab4f8; font-weight: 700; }
.t-out { color: #c4c7c5; }
.t-key { color: #c58af9; }
.t-str { color: #81c995; }
.t-num { color: #fdd663; }
.t-cursor {
    display: inline-block;
    width: .6em;
    height: 1.1em;
    vertical-align: text-bottom;
    background: var(--terminal-fg);
    animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- Sections ---------- */
.section { padding: 112px 0; }
.section--surface { background: var(--surface-container-low); }

.section__header { max-width: 720px; margin-bottom: 56px; }
.section__kicker {
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--primary);
}
.section__title {
    margin-top: 12px;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    line-height: 1.15;
    font-weight: 700;
    letter-spacing: -.025em;
}

/* ---------- About ---------- */
.about__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 56px;
    align-items: start;
}
.about__text p { font-size: 1.1rem; color: var(--on-surface-variant); }
.about__text p + p { margin-top: 20px; }
.about__text strong { color: var(--on-surface); font-weight: 600; }

.stats { display: grid; gap: 12px; }
.stat {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    border-radius: var(--radius-l);
    background: var(--surface-container);
}
.stat__value {
    font-size: 1.9rem;
    font-weight: 700;
    letter-spacing: -.03em;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
}
.stat__label { color: var(--on-surface-variant); font-size: .95rem; line-height: 1.4; }

/* ---------- Cards ---------- */
.card {
    border-radius: var(--radius-l);
    padding: 28px;
    transition: box-shadow .25s var(--ease), transform .25s var(--ease), background-color .25s var(--ease);
}
.card p { color: var(--on-surface-variant); }

.card--elevated { background: var(--surface); box-shadow: var(--shadow-1); }
.card--elevated:hover { box-shadow: var(--shadow-2); }

.card--filled { background: var(--surface-container); }
.card--filled:hover { background: var(--surface-container-high); transform: translateY(-2px); }

.card--tonal { background: var(--primary-container); color: var(--on-primary-container); }

.card__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 16px;
}
.card__title { font-size: 1.2rem; font-weight: 600; letter-spacing: -.01em; }
.card__org { margin: 4px 0 12px; font-weight: 500; color: var(--primary) !important; }

.card__icon {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    margin-bottom: 20px;
    border-radius: var(--radius-m);
    background: var(--primary-container);
    color: var(--on-primary-container);
}
.card__icon svg { width: 26px; height: 26px; fill: currentColor; }
.card--filled .card__title { margin-bottom: 8px; }

.cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.badge {
    display: inline-flex;
    align-items: center;
    height: 28px;
    padding-inline: 12px;
    border-radius: var(--radius-s);
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
    font-size: .8rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}
.badge--primary { background: var(--primary); color: var(--on-primary); }

/* ---------- Timeline ---------- */
.timeline { position: relative; display: grid; gap: 20px; padding-left: 40px; }
.timeline::before {
    content: "";
    position: absolute;
    left: 11px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    border-radius: 2px;
    background: linear-gradient(var(--primary), var(--outline-variant));
}
.timeline__item { position: relative; }
.timeline__marker {
    position: absolute;
    left: -40px;
    top: 30px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--surface-container-low);
    border: 2px solid var(--outline);
}
.timeline__item:first-child .timeline__marker {
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--primary) 20%, transparent);
}

/* ---------- Contact ---------- */
.contact {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    padding: 48px;
    border-radius: var(--radius-xl);
}
.contact .section__kicker { color: inherit; opacity: .8; }
.contact p { color: inherit; opacity: .9; margin-top: 16px; font-size: 1.05rem; }
.note { display: block; margin-top: 8px; font-size: .95rem; opacity: .85; font-style: italic; }

.contact__links { display: grid; gap: 12px; }
.social {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    border-radius: var(--radius-l);
    background: var(--surface);
    color: var(--on-surface);
    text-decoration: none;
    box-shadow: var(--shadow-1);
    transition: box-shadow .2s var(--ease), transform .2s var(--ease);
}
.social:hover { box-shadow: var(--shadow-3); transform: translateY(-2px); }
.social__icon { width: 28px; height: 28px; fill: var(--primary); }
.social__text { display: flex; flex-direction: column; line-height: 1.3; }
.social__name { font-weight: 600; }
.social__handle { font-size: .85rem; color: var(--on-surface-variant); font-family: var(--font-mono); }

/* ---------- Footer ---------- */
.footer {
    padding: 32px 0;
    border-top: 1px solid var(--outline-variant);
    color: var(--on-surface-variant);
    font-size: .9rem;
}
.footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 24px;
}
.footer__links { display: flex; gap: 24px; }
.footer a { color: inherit; text-decoration: none; }
.footer a:hover { color: var(--primary); }

/* ---------- Reveal on scroll (only when JS is available) ---------- */
.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1000px) {
    .cards { grid-template-columns: repeat(2, 1fr); }
    .hero__grid { grid-template-columns: 1fr; gap: 48px; }
    .hero__visual { max-width: 520px; }
    .terminal { transform: none; }
    .about__grid { grid-template-columns: 1fr; gap: 40px; }
    .stats { grid-template-columns: repeat(3, 1fr); }
    .stat { flex-direction: column; align-items: flex-start; gap: 4px; }
    .contact { grid-template-columns: 1fr; padding: 36px; }
}

@media (max-width: 860px) {
    .nav-toggle { display: grid; }
    .nav {
        position: absolute;
        top: calc(var(--bar-h) - 4px);
        left: 12px;
        right: 12px;
        padding: 8px;
        border-radius: var(--radius-l);
        background: var(--surface-container-high);
        box-shadow: var(--shadow-3);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px);
        transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
    }
    .nav.is-open { opacity: 1; visibility: visible; transform: none; }
    .nav__list { flex-direction: column; align-items: stretch; }
    .nav__link { width: 100%; height: 48px; }
    .nav__sep { width: auto; height: 1px; margin: 4px 16px; }

    /* Without JS: show the menu inline below the bar */
    .no-js .nav-toggle { display: none; }
    .no-js .top-bar { position: static; height: auto; }
    .no-js .top-bar__inner { flex-wrap: wrap; padding-block: 12px; }
    .no-js .nav { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: none; width: 100%; order: 3; }
    .no-js .hero { padding-top: 48px; }
}

@media (max-width: 600px) {
    .container { padding-inline: 20px; }
    .section { padding: 80px 0; }
    .section__header { margin-bottom: 40px; }
    .cards { grid-template-columns: 1fr; }
    .stats { grid-template-columns: 1fr; }
    .stat { flex-direction: row; align-items: center; gap: 20px; }
    .brand__name { display: none; }
    .hero__cta .btn { flex: 1 1 100%; }
    .terminal__body { font-size: .8rem; padding: 16px 18px 20px; }
    .card { padding: 22px; }
    .contact { padding: 28px 22px; }
    .timeline { padding-left: 32px; }
    .timeline__marker { left: -32px; width: 20px; height: 20px; }
    .timeline::before { left: 9px; }
}

/* ---------- Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .js .reveal { opacity: 1; transform: none; }
    .terminal { transform: none; }
}

/* ---------- Print ---------- */
@media print {
    .top-bar, .hero__visual, .hero__bg, .hero__cta, .skip-link, .footer__links { display: none !important; }
    .hero { min-height: 0; padding: 0 0 24px; }
    .section { padding: 24px 0; }
    .js .reveal { opacity: 1; transform: none; }
    .card, .social { box-shadow: none; border: 1px solid #ccc; }
}