:root {
    --accent: #b3121f;
    --accent-dark: #8a0e18;
    --ink: #1a1a1a;
    --ink-soft: #444;
    --rule: #e5e5e5;
    --bg: #ffffff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
}
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }
h2 { scroll-margin-top: 6rem; }
.column { max-width: 46rem; margin: 0 auto; padding: 0 1.5rem; }

/* ---- page title ---- */
.page-title { padding: 3.5rem 0 1.5rem; text-align: center; }
.kicker {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-bottom: 1.2rem;
}
.kicker::before { content: "■ "; color: var(--accent); }
.page-title h1 {
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    font-weight: 800;
    line-height: 1.15;
    margin: 0 auto 1.2rem;
}
.page-title p { max-width: 36rem; margin: 0 auto; color: var(--ink-soft); }

/* ---- sections ---- */
section { padding: 2.5rem 0; border-top: 1px solid var(--rule); }
section > .column > h2 {
    font-size: 1.4rem;
    font-weight: 800;
    margin: 0 0 1.5rem;
}
.btn {
    display: inline-block;
    padding: 0.6rem 1.3rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    cursor: pointer;
    font-family: inherit;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); color: #fff; }
.btn.ghost { color: var(--accent); border-color: var(--accent); background: transparent; }
.btn.ghost:hover { background: #faf0f0; }
.btn.small { padding: 0.35rem 0.8rem; font-size: 0.85rem; }

.callout {
    border-left: 4px solid var(--accent);
    background: #fafafa;
    padding: 1.2rem 1.5rem;
    margin: 1.5rem 0;
}
.callout p { margin: 0 0 0.6rem; color: var(--ink-soft); }
.callout p:last-child { margin-bottom: 0; }

/* ---- FAQ (accordéon) ---- */
details.q {
    border-bottom: 1px solid var(--rule);
    padding: 0.2rem 0;
}
details.q summary {
    cursor: pointer;
    font-weight: 700;
    padding: 0.8rem 2rem 0.8rem 0;
    position: relative;
    list-style: none;
}
details.q summary::-webkit-details-marker { display: none; }
details.q summary::after {
    content: "+";
    position: absolute;
    right: 0.2rem;
    top: 0.6rem;
    font-size: 1.4rem;
    color: var(--accent);
    font-weight: 400;
}
details.q[open] summary::after { content: "−"; }
details.q .answer { padding: 0 0 1rem; color: var(--ink-soft); }
details.q .answer p { margin: 0 0 0.8rem; }
details.q .answer ul { margin: 0 0 0.8rem; padding-left: 1.2rem; }
details.q .answer li { margin-bottom: 0.4rem; }
details.q blockquote {
    margin: 0.5rem 0 0.8rem;
    padding: 0.6rem 1rem;
    border-left: 4px solid var(--accent);
    background: #fafafa;
}

ul.dash { list-style: none; padding: 0; margin: 1rem 0; }
ul.dash > li { padding-left: 1.4rem; position: relative; margin-bottom: 0.5rem; }
ul.dash > li::before { content: "—"; position: absolute; left: 0; color: var(--accent); }
ul.sources { font-size: 0.92rem; color: var(--ink-soft); }
ul.sources a { word-break: break-word; }

/* ---- étapes numérotées ---- */
ol.steps { list-style: none; counter-reset: step; padding: 0; margin: 0; }
ol.steps > li {
    counter-increment: step;
    display: flex;
    gap: 1.2rem;
    margin-bottom: 1.4rem;
}
ol.steps > li::before {
    content: counter(step, decimal-leading-zero);
    font-family: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
    color: var(--accent);
    padding-top: 0.1rem;
}
ol.steps h3 { margin: 0 0 0.2rem; font-size: 1.05rem; }
ol.steps p { margin: 0; color: var(--ink-soft); }

/* ---- carrousels ---- */
.wide { max-width: 64rem; margin: 0 auto; padding: 0 1.5rem; }
.carousels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
@media (max-width: 40rem) { .carousels { grid-template-columns: 1fr; } }
.carousel {
    border: 1px solid var(--rule);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    min-width: 0;
}
.carousel .num {
    font-family: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
    font-size: 0.8rem;
    color: var(--accent);
}
.carousel h3 { margin: 0; font-size: 1.1rem; }
.carousel .sub { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }

.viewer {
    position: relative;
    display: grid;
    background: #f4f4f4;
    border-radius: 6px;
    overflow: hidden;
    min-height: 10rem;
}
.viewer:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.viewer img {
    grid-area: 1 / 1;
    width: 100%;
    height: auto;
    display: block;
    opacity: 0;
    transition: opacity 0.6s ease;
}
.viewer img.on { opacity: 1; }
/* sans JavaScript : on montre au moins la première image */
.viewer:not(.js) img:first-of-type { opacity: 1; }
.viewer .empty {
    grid-area: 1 / 1;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
    color: var(--ink-soft);
    font-size: 0.9rem;
}
.viewer.noimg .empty { display: flex; }
.viewer.noimg img { display: none; }
@media (prefers-reduced-motion: reduce) { .viewer img { transition: none; } }

.ctrl { display: flex; align-items: center; gap: 0.6rem; }
.ctrl button {
    font: inherit;
    cursor: pointer;
    border: 1px solid #cfcfcf;
    background: #fff;
    color: var(--ink);
    border-radius: 4px;
}
.ctrl .prev, .ctrl .next { width: 2.2rem; height: 2.2rem; font-size: 1.3rem; line-height: 1; }
.ctrl .prev:hover, .ctrl .next:hover, .ctrl .play:hover { border-color: var(--accent); color: var(--accent); }
.ctrl .dots { display: flex; gap: 0.45rem; flex: 1; justify-content: center; }
.ctrl .dots button { width: 0.75rem; height: 0.75rem; padding: 0; border-radius: 50%; border-color: var(--accent); }
.ctrl .dots button[aria-current="true"] { background: var(--accent); }
.ctrl .pos { font-size: 0.8rem; color: var(--ink-soft); font-variant-numeric: tabular-nums; white-space: nowrap; }
.ctrl .play { padding: 0.3rem 0.7rem; font-size: 0.8rem; }

.carousel .files { display: flex; gap: 0.6rem 1rem; flex-wrap: wrap; align-items: center; }
.carousel .each { font-size: 0.85rem; color: var(--ink-soft); }
.carousel .each a { margin-right: 0.35rem; }
.allzip { text-align: center; margin: 0 0 1.5rem; }
.caption { border-top: 1px solid var(--rule); padding-top: 0.7rem; display: flex; flex-direction: column; gap: 0.6rem; align-items: flex-start; }
.caption details { width: 100%; }
.caption summary { cursor: pointer; font-weight: 600; font-size: 0.9rem; color: var(--accent); }
.caption .captext { margin-top: 0.6rem; font-size: 0.88rem; color: var(--ink-soft); max-height: 16rem; overflow: auto; }
.caption .captext p { margin: 0 0 0.7rem; }
.caption .captext .tags { color: var(--accent); }
code { font-size: 0.9em; background: #f4f4f4; padding: 0.1em 0.35em; border-radius: 3px; }

/* ---- réseaux ---- */
.networks { display: grid; grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); gap: 1rem; }
.network {
    border: 1px solid var(--rule);
    border-radius: 6px;
    padding: 1rem 1.1rem;
}
.network h3 { margin: 0 0 0.3rem; font-size: 1.05rem; }
.network p { margin: 0 0 0.7rem; font-size: 0.88rem; color: var(--ink-soft); }
.network .links { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.sharetext {
    width: 100%;
    min-height: 6.5rem;
    padding: 0.8rem;
    border: 1px solid var(--rule);
    border-radius: 4px;
    font: inherit;
    resize: vertical;
}
.sharebar { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 0.6rem; align-items: center; }
.sharebar .ok { font-size: 0.85rem; color: #2e7d23; }
.tabs { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-bottom: 0.8rem; }
.tabs button[aria-pressed="true"] { background: var(--accent); color: #fff; }

footer {
    border-top: 1px solid var(--rule);
    padding: 2rem 0 3rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--ink-soft);
}