/* Les Cahiers de l'IA en entreprise — fond clair, accent indigo #4f52c8 */
.page-cahiers {
    --cah-indigo: #4f52c8;
    --cah-indigo-strong: #3b3ea8;
    --cah-indigo-soft: rgba(79, 82, 200, 0.08);
    --cah-ink: #0a0a14;
    --cah-muted: #52526e;
    --cah-border: rgba(10, 10, 20, 0.09);
}

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

.cah-eyebrow {
    margin: 0 0 .5rem;
    font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
    color: var(--cah-indigo);
}

/* ── Grille de cartes ── */
.cah-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.75rem;
}
.cah-card {
    display: flex; flex-direction: column;
    background: #fff; border: 1px solid var(--cah-border); border-radius: 18px;
    overflow: hidden;
    transition: box-shadow .2s ease, transform .2s ease, border-color .2s ease;
}
.cah-card:hover { box-shadow: 0 14px 36px rgba(79, 82, 200, .14); transform: translateY(-2px); border-color: rgba(79, 82, 200, .3); }
.cah-card__cover {
    display: block; background: var(--cah-indigo-soft); padding: 1.5rem 1.5rem 0;
}
.cah-card__cover img {
    display: block; width: 100%; max-width: 220px; height: auto; margin: 0 auto;
    border-radius: 6px 6px 0 0; box-shadow: 0 10px 30px rgba(10, 10, 20, .25);
}
.cah-card__body { display: flex; flex-direction: column; gap: .6rem; padding: 1.4rem 1.5rem 1.6rem; flex: 1; }
.cah-card__title { margin: 0; font-size: 1.15rem; line-height: 1.3; }
.cah-card__title a { color: var(--cah-ink); text-decoration: none; }
.cah-card__title a:hover { color: var(--cah-indigo); }
.cah-card__tagline, .cah-card__audience { margin: 0; color: var(--cah-muted); font-size: .95rem; }
.cah-card .lyn-btn { margin-top: auto; align-self: flex-start; }

/* ── Page livre blanc ── */
.cah-hero__grid {
    display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 3rem; align-items: center;
}
.cah-hero__cover img {
    display: block; width: 100%; max-width: 340px; height: auto; margin: 0 auto;
    border-radius: 8px; box-shadow: 0 24px 60px rgba(79, 82, 200, .28);
}
.cah-audience { color: var(--cah-muted); }

.cah-layout {
    display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(300px, 1fr);
    gap: 3rem; align-items: start;
}
.cah-content h2 { margin: 3.5rem 0 1rem; font-size: 1.4rem; }
.cah-content h2:first-child { margin-top: 0; }
body.theme-atelier .pub-wrap > .lyn-section .cah-content h2 { margin: 3.5rem 0 1.25rem; }
body.theme-atelier .pub-wrap > .lyn-section .cah-content h2:first-child { margin-top: 0; }
.cah-content p { margin: 0 0 1.1rem; line-height: 1.75; color: var(--cah-muted); }

.cah-checklist { list-style: none; margin: 1.25rem 0 0; padding: 0; display: grid; gap: 1rem; }
.cah-checklist li {
    position: relative; padding: 1.1rem 1.25rem 1.1rem 3.6rem; line-height: 1.65; color: var(--cah-ink);
    background: #fff; border: 1px solid var(--cah-border); border-radius: 12px;
    box-shadow: 0 2px 10px rgba(10, 10, 20, .04);
}
.cah-checklist li::before {
    content: '✓'; position: absolute; left: 1.1rem; top: 1.15rem;
    width: 1.6rem; height: 1.6rem; border-radius: 50%;
    background: var(--cah-indigo); color: #fff; font-size: .9rem; font-weight: 700;
    display: grid; place-items: center;
}

.cah-toc { list-style: none; margin: 0; padding: 0; counter-reset: cah-toc; }
.cah-toc li {
    counter-increment: cah-toc;
    display: grid; grid-template-columns: 2.2rem 1fr auto; gap: 0 .75rem;
    padding: 1.15rem 0; border-bottom: 1px solid var(--cah-border);
}
.cah-toc li::before {
    content: counter(cah-toc, decimal-leading-zero);
    grid-row: span 2; color: var(--cah-indigo); font-weight: 700;
}
.cah-toc__title { font-weight: 600; color: var(--cah-ink); }
.cah-toc__page { color: var(--cah-muted); font-size: .85rem; }
.cah-toc__desc { grid-column: 2 / 4; color: var(--cah-muted); font-size: .9rem; }

.cah-preview { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.25rem; }
.cah-preview img {
    width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--cah-border);
    box-shadow: 0 8px 24px rgba(10, 10, 20, .1);
}

/* ── Formulaire ── */
.cah-aside { position: sticky; top: 6rem; }
.cah-form-card {
    background: #fff; border: 1px solid var(--cah-border); border-top: 4px solid var(--cah-indigo);
    border-radius: 18px; padding: 1.75rem; box-shadow: 0 16px 44px rgba(79, 82, 200, .12);
}
.cah-form-card h2 { margin: 0 0 .4rem; font-size: 1.35rem; }
.cah-form-card__sub { margin: 0 0 1.25rem; color: var(--cah-muted); font-size: .92rem; }
.cah-form .contact-row { grid-template-columns: 1fr 1fr; }
.cah-check { display: flex; gap: .65rem; align-items: flex-start; margin: .8rem 0; font-size: .85rem; line-height: 1.45; color: var(--cah-ink); }
.cah-check input { margin-top: .2rem; accent-color: var(--cah-indigo); flex: none; width: auto; }
.cah-submit { width: 100%; margin-top: .75rem; justify-content: center; }
.page-cahiers .lyn-btn-primary { background: var(--cah-indigo); border-color: var(--cah-indigo); }
.page-cahiers .lyn-btn-primary:hover { background: var(--cah-indigo-strong); border-color: var(--cah-indigo-strong); }
.page-cahiers .contact-field input:focus { border-color: var(--cah-indigo); box-shadow: 0 0 0 3px var(--cah-indigo-soft); }
.page-cahiers .contact-field .required { color: var(--cah-indigo); }

/* ── Confirmation ── */
.cah-merci { display: flex; gap: 2.5rem; align-items: center; flex-wrap: wrap; max-width: 760px; margin: 0 auto; }
.cah-merci__cover { width: 200px; height: auto; border-radius: 8px; box-shadow: 0 18px 48px rgba(79, 82, 200, .3); }
.cah-note { color: var(--cah-muted); font-size: .9rem; }

@media (max-width: 900px) {
    .cah-hero__grid, .cah-layout { grid-template-columns: 1fr; gap: 2rem; }
    .cah-hero__cover { order: -1; }
    .cah-hero__cover img { max-width: 220px; }
    .cah-aside { position: static; }
}
@media (max-width: 480px) {
    .cah-form .contact-row { grid-template-columns: 1fr; }
}

body.lyn-site .cah-content > h2 { margin: 2.75rem 0 1rem; }
body.lyn-site .cah-content > h2:first-child { margin-top: 0; }