/* How To Play Chess : les échecs, le cerveau et la santé */
:root {
  --bg: #f6f5f1;
  --paper: #ffffff;
  --ink: #1e1b2f;
  --muted: #514d66;
  --line: #dcd8e6;
  --indigo: #3f3285;
  --indigo-dark: #2a2160;
  --indigo-soft: #eeebf8;
  --sage: #2d6a4f;
  --sage-soft: #e7f2ec;
  --rust: #a2401f;
  --rust-soft: #fbeee8;
  --amber-soft: #fdf5e2;
  --radius: 10px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Atkinson Hyperlegible", "Segoe UI", Arial, sans-serif;
  font-size: 1.08rem;
  line-height: 1.7;
  overflow-wrap: break-word;
}
a { color: var(--indigo); text-underline-offset: 2px; }
a:hover { color: var(--indigo-dark); }
h1, h2, h3 { font-family: "Source Serif 4", Georgia, serif; line-height: 1.25; color: var(--indigo-dark); }
h1 { font-size: clamp(1.75rem, 4.2vw, 2.55rem); margin: .3rem 0 .6rem; }
h2 { font-size: clamp(1.35rem, 3vw, 1.75rem); margin: 2.4rem 0 .8rem; padding-top: .4rem; border-top: 1px solid var(--line); }
h3 { font-size: 1.2rem; margin: 1.6rem 0 .5rem; }

/* En-tête */
.site-header { background: var(--paper); border-bottom: 4px solid var(--indigo); }
.header-inner { max-width: 1180px; margin: 0 auto; padding: .7rem 16px; display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1.5rem; }
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--indigo-dark); font-family: "Source Serif 4", Georgia, serif; font-weight: 700; font-size: 1.3rem; line-height: 1.15; }
.brand small { display: block; font-family: "Atkinson Hyperlegible", Arial, sans-serif; font-weight: 400; font-size: .82rem; color: var(--muted); }
.brand-mark { width: 42px; height: 42px; color: var(--indigo); flex: none; }
.nav-toggle { display: none; margin-left: auto; background: var(--indigo); color: #fff; border: 0; border-radius: 6px; padding: .45rem .9rem; font: inherit; font-size: .95rem; cursor: pointer; }
.site-nav { display: flex; flex-wrap: wrap; gap: .3rem 1.4rem; margin-left: auto; }
.nav-group { display: flex; flex-wrap: wrap; align-items: baseline; gap: .1rem .7rem; font-size: .93rem; }
.nav-title { font-weight: 700; color: var(--rust); text-transform: uppercase; letter-spacing: .04em; font-size: .74rem; }
.nav-group a { text-decoration: none; color: var(--ink); }
.nav-group a:hover { color: var(--indigo); text-decoration: underline; }

/* Fil d'Ariane */
.breadcrumb { max-width: 820px; margin: 0 auto; padding: 1rem 16px 0; font-size: .88rem; color: var(--muted); }
.breadcrumb ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; }
.breadcrumb li + li::before { content: "›"; margin: 0 .45rem; color: var(--muted); }

/* Article */
main { padding: 0 16px 3rem; }
.article { max-width: 820px; margin: 0 auto; padding-top: 1rem; }
.article.home { max-width: 980px; }
.kicker { display: inline-block; margin-top: 1rem; font-size: .8rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--sage); }
.meta { font-size: .88rem; color: var(--muted); margin: 0 0 1.2rem; }
.answer { background: var(--indigo-soft); border-left: 5px solid var(--indigo); border-radius: 0 var(--radius) var(--radius) 0; padding: .9rem 1.2rem; margin: 1rem 0 1.2rem; font-size: 1.12rem; }
.answer p { margin: .3rem 0; }
.definition { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1.1rem; margin: 1rem 0; }
.definition p { margin: .2rem 0; }
dfn { font-style: normal; font-weight: 700; color: var(--indigo-dark); }
.medical-note { background: var(--amber-soft); border: 1px solid #ecd9a6; border-radius: var(--radius); padding: .7rem 1rem; margin: 1rem 0 1.4rem; font-size: .95rem; }
.limits { background: var(--rust-soft); border-left: 5px solid var(--rust); border-radius: 0 var(--radius) var(--radius) 0; padding: .8rem 1.1rem; margin: 1.2rem 0; }
.limits h3, .limits p.lt { margin-top: 0; color: var(--rust); font-family: "Source Serif 4", Georgia, serif; font-weight: 700; font-size: 1.1rem; }
.limits ul { margin: .3rem 0; padding-left: 1.2rem; }
.tip { background: var(--sage-soft); border-left: 5px solid var(--sage); border-radius: 0 var(--radius) var(--radius) 0; padding: .8rem 1.1rem; margin: 1.2rem 0; }
.toc { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1.1rem; margin: 1.2rem 0 1.6rem; font-size: .97rem; }
.toc ol { margin: .4rem 0 0; padding-left: 1.3rem; }

/* Fiches d'études */
.study { background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--sage); border-radius: var(--radius); padding: .9rem 1.1rem; margin: 1.1rem 0; font-size: .98rem; }
.study-head { margin: 0; color: var(--indigo-dark); }
.study-title { margin: .1rem 0 .6rem; font-style: italic; color: var(--muted); font-size: .92rem; }
.study dl { margin: 0; display: grid; grid-template-columns: minmax(7.5rem, 11rem) 1fr; gap: .25rem .9rem; }
.study dt { font-weight: 700; font-size: .88rem; color: var(--muted); }
.study dd { margin: 0; }

/* Tableaux */
.table-wrap { overflow-x: auto; margin: 1.2rem 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); }
table { border-collapse: collapse; width: 100%; font-size: .93rem; line-height: 1.45; }
th, td { padding: .55rem .7rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { background: var(--indigo); color: #fff; font-weight: 700; }
tr:nth-child(even) td { background: #faf9fd; }
caption { caption-side: top; text-align: left; padding: .6rem .7rem; font-weight: 700; color: var(--indigo-dark); }

/* Accueil */
.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1rem; margin: 1.2rem 0; }
.hub-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.hub-card h3 { margin-top: 0; }
.hub-card ul { margin: 0; padding-left: 1.1rem; }
.reasons { counter-reset: r; list-style: none; padding: 0; }
.reasons > li { counter-increment: r; position: relative; padding: .7rem .9rem .7rem 3.2rem; margin: .7rem 0; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); }
.reasons > li::before { content: counter(r); position: absolute; left: .8rem; top: .7rem; width: 1.8rem; height: 1.8rem; border-radius: 50%; background: var(--indigo); color: #fff; font-weight: 700; text-align: center; line-height: 1.8rem; font-size: .95rem; }
.badge { display: inline-block; font-size: .75rem; font-weight: 700; padding: .05rem .5rem; border-radius: 99px; background: var(--sage-soft); color: var(--sage); vertical-align: middle; }
.badge.weak { background: var(--rust-soft); color: var(--rust); }
.badge.mid { background: var(--amber-soft); color: #7a5200; }
.scale { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: .6rem; margin: 1rem 0; }
.scale div { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .6rem .8rem; font-size: .93rem; }
.scale strong { display: block; color: var(--indigo-dark); }

/* FAQ et liens */
.faq details { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: .6rem 1rem; margin: .6rem 0; }
.faq summary { cursor: pointer; font-weight: 700; color: var(--indigo-dark); }
.faq details p { margin: .6rem 0 .2rem; }
.related { margin-top: 2.4rem; }
.related ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: .7rem; }
.related li a { display: block; height: 100%; background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--rust); border-radius: var(--radius); padding: .7rem .9rem; text-decoration: none; font-weight: 700; }

/* Pied de page */
.site-footer { background: var(--indigo-dark); color: #e9e6f5; margin-top: 2rem; font-size: .93rem; }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 2rem 16px 1rem; display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 1.5rem; }
.footer-title { font-family: "Source Serif 4", Georgia, serif; font-weight: 700; font-size: 1.05rem; color: #fff; margin: 0 0 .5rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: .25rem 0; }
.site-footer a { color: #e9e6f5; }
.site-footer a:hover { color: #fff; }
.footer-warning { background: rgba(255,255,255,.08); border-radius: 8px; padding: .6rem .8rem; }
.footer-bottom { max-width: 1180px; margin: 0 auto; padding: .8rem 16px 1.4rem; border-top: 1px solid rgba(255,255,255,.18); font-size: .82rem; color: #cfcae6; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .site-nav { display: none; width: 100%; flex-direction: column; gap: .7rem; padding: .5rem 0 .3rem; }
  .site-nav.open { display: flex; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  body { font-size: 1.02rem; }
  .footer-inner { grid-template-columns: 1fr; }
  .study dl { grid-template-columns: 1fr; }
  .study dt { margin-top: .3rem; }
  .brand { font-size: 1.12rem; }
}

/* sélecteur de langue (pbn_i18n) */
.lang-switch{max-width:1100px;margin:24px auto 0;padding:14px 20px 0;border-top:1px solid rgba(255,255,255,.12);font-size:.82rem;line-height:1.9;text-align:center;opacity:.85}
.lang-switch a{color:inherit;text-decoration:none;white-space:nowrap}
.lang-switch a:hover{text-decoration:underline}
.lang-switch a.current{font-weight:700;text-decoration:underline}