/* Charte de l’accueil uniquement : les pages CV et présentation gardent leurs styles. */
.brain-home {
    --brain-ink: #192a27;
    --brain-muted: #526660;
    --brain-paper: #f7f8f2;
    --brain-line: #d9dfd5;
    color: var(--brain-ink);
    background: var(--brain-paper);
}
[data-theme="dark"] .brain-home {
    --brain-ink: #edf3e8;
    --brain-muted: #b2c1b9;
    --brain-paper: #141d1a;
    --brain-line: #37453e;
}
.brain-home .container { max-width: 1160px; }
.brain-home .logo { color: var(--brain-ink); letter-spacing: -.05em; }
.brain-home .nav-links a { color: var(--brain-ink); }
.brain-home .nav-links a.nav-badge { color: #fff; background: #284a3e; box-shadow: none; }
.brain-home .nav-links a.nav-badge.active { box-shadow: 0 0 0 2px var(--brain-paper), 0 0 0 4px #59816c; }
.brain-intro { padding-top: 64px; }
.brain-eyebrow { font-size: .72rem; font-weight: 650; letter-spacing: .12em; text-transform: uppercase; color: var(--brain-muted); }
.brain-eyebrow > span { color: #59816c; margin-right: 8px; }
.brain-intro-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 70px; align-items: center; margin-top: 38px; }
.brain-wordmark { display: flex; flex-wrap: wrap; align-items: baseline; gap: 2px 12px; margin-bottom: 24px; }
.brain-wordmark .brain-wordmark-kind { flex-basis: 100%; font-size: .65rem; font-weight: 650; letter-spacing: .2em; text-transform: uppercase; color: var(--brain-muted); }
.brain-wordmark strong { font-size: 2rem; font-weight: 750; letter-spacing: -.055em; line-height: 1.25; }
.brain-wordmark .brain-wordmark-by { font-size: .75rem; color: var(--brain-muted); white-space: nowrap; }
.brain-wordmark-by a { color: var(--brain-ink); text-decoration-thickness: 1px; text-underline-offset: 4px; }
.brain-harness-definition { max-width: 430px; margin: -10px 0 28px; color: var(--brain-muted); font-size: .8rem; line-height: 1.7; }
.brain-intro h1 { font-size: clamp(2.3rem, 4.2vw, 3.5rem); line-height: 1.12; letter-spacing: -.055em; font-weight: 650; }
.brain-intro h1 em { font-style: normal; color: #3e7258; }
[data-theme="dark"] .brain-intro h1 em { color: #a5cba8; }
.brain-lead { color: var(--brain-muted); font-size: 1.02rem; line-height: 1.8; margin-top: 24px; max-width: 490px; }
.brain-actions { display: flex; gap: 24px; flex-wrap: wrap; align-items: center; margin-top: 30px; }
.brain-button, .brain-text-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 46px; font-size: .85rem; font-weight: 600; text-decoration: none; }
.brain-button { background: #284a3e; color: #fff; border-radius: 8px; padding: 12px 18px; transition: background .2s; }
.brain-button:hover { background: #366550; }
.brain-text-link { color: var(--brain-ink); }
.brain-text-link:hover { text-decoration: underline; }
.brain-diagram { padding: 12px 0; }
.brain-diagram img { display: block; width: 100%; max-width: 560px; height: auto; margin: 0 auto; }
.brain-diagram figcaption { margin-top: 18px; text-align: center; font-size: .78rem; line-height: 1.7; color: var(--brain-muted); }
.brain-signature { margin-top: 52px; padding: 22px 0; border-top: 1px solid var(--brain-line); border-bottom: 1px solid var(--brain-line); display: flex; justify-content: space-between; gap: 12px; font-size: .75rem; color: var(--brain-muted); }
.brain-signature strong { font-weight: 600; color: var(--brain-ink); }
.brain-engines { padding-top: 66px; scroll-margin-top: 95px; }
.brain-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 35px; margin-bottom: 28px; }
.brain-section-heading h2, .brain-more h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); line-height: 1.25; letter-spacing: -.04em; font-weight: 600; margin-top: 12px; }
.brain-section-heading > p { max-width: 350px; font-size: .9rem; color: var(--brain-muted); }
.engine-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.engine-card { --card-accent: #365d49; --card-tint: #eaf0e4; background: var(--card-tint); border: 1px solid var(--brain-line); border-radius: 14px; padding: 30px; }
.engine-execution { --card-accent: #375d78; --card-tint: #eaf0f3; }
.engine-verification { --card-accent: #74552e; --card-tint: #f4eee3; }
.engine-evaluation { --card-accent: #685778; --card-tint: #eeebf2; }
[data-theme="dark"] .engine-card { background: var(--bg-color); --card-accent: #b6d2bd; }
[data-theme="dark"] .engine-execution { --card-accent: #accede; }
[data-theme="dark"] .engine-verification { --card-accent: #dfc299; }
[data-theme="dark"] .engine-evaluation { --card-accent: #cfc0e5; }
.engine-card-top { display: flex; justify-content: space-between; align-items: center; color: var(--card-accent); font-size: .64rem; letter-spacing: .1em; font-weight: 650; margin-bottom: 24px; }
.engine-symbol { font-size: 1.8rem; line-height: 1; }
.engine-card h3 { font-size: 1.5rem; letter-spacing: -.035em; font-weight: 600; }
.engine-card .engine-subtitle { color: var(--card-accent); font-weight: 600; font-size: .9rem; margin: 5px 0 14px; }
.engine-card p { color: var(--brain-muted); font-size: .9rem; line-height: 1.75; }
.engine-flow { display: flex; align-items: center; gap: 12px; margin: 24px 0 18px; font-size: .74rem; color: var(--card-accent); }
.engine-flow span:not(:nth-child(2)) { border: 1px solid var(--brain-line); border-radius: 6px; padding: 6px 10px; }
.engine-card details { border-top: 1px solid var(--brain-line); }
.engine-card summary { padding: 14px 0 0; min-height: 44px; cursor: pointer; font-size: .77rem; font-weight: 600; }
.engine-card details p { margin-top: 12px; font-size: .83rem; }
.engine-card .engine-presentation-link { display: flex; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--brain-line); color: var(--card-accent); font-size: .8rem; }
.engine-card summary:focus-visible { outline: 3px solid var(--card-accent); outline-offset: 4px; }
.engine-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
/* Derniers articles (catalogue data/articles.json) */
.brain-latest { padding-top: 64px; }
.brain-latest-grid { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.brain-latest-card { display: flex; flex-direction: column; gap: 10px; height: 100%; padding: 24px; border: 1px solid var(--brain-line); border-radius: 14px; color: var(--brain-ink); text-decoration: none; transition: border-color .2s ease, transform .2s ease; }
.brain-latest-card:hover, .brain-latest-card:focus-visible { border-color: #59816c; transform: translateY(-2px); }
.brain-latest-card strong { font-size: 1.05rem; line-height: 1.35; font-weight: 650; letter-spacing: -.02em; }
.brain-latest-card > span:last-child { font-size: .85rem; line-height: 1.6; color: var(--brain-muted); }
.brain-more { padding-top: 44px; padding-bottom: 64px; margin-top: 52px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brain-more p:not(.brain-eyebrow) { color: var(--brain-muted); max-width: 540px; font-size: .9rem; margin-top: 14px; }
.brain-more .brain-actions { flex-shrink: 0; }
.brain-home .footer { background: transparent; color: var(--brain-muted); border-top: 1px solid var(--brain-line); }
@media (max-width: 900px) {
    .brain-intro-grid { gap: 32px; }
    .brain-more { display: block; }
    .brain-latest-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .brain-intro { padding-top: 36px; }
    .brain-intro-grid, .engine-grid { grid-template-columns: 1fr; }
    .brain-diagram { margin-top: 12px; }
    .brain-section-heading { display: block; }
    .brain-section-heading > p { margin-top: 18px; }
    .brain-signature { flex-direction: column; margin-top: 30px; }
    .brain-engines { padding-top: 40px; }
    .engine-card { padding: 24px; }
    .brain-actions { gap: 16px; }
    .brain-more { margin-top: 12px; }
}
@media (prefers-reduced-motion: reduce) { .brain-home * { scroll-behavior: auto; transition: none; } }