/* GeniMath — éléments communs à toutes les pages : bandeau, pied de page.
   Les sélecteurs sont volontairement précis (.topbar, #navigation, footer.site-footer)
   pour ne pas être modifiés par les styles propres aux générateurs (nav, nav a, button…). */
:root {
  --ink: #232428;
  --muted: #5f6470;
  --bar: #1f2024;
  --bar-soft: #34363b;
  --red: #d3131c;
  --red-dark: #a90d14;
  --page: #fdf8f3;
  --line-warm: #ecdfd2;
  --font: "Nunito", "Arial Rounded MT Bold", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}
@media screen { body { background: var(--page); } }
.skip { position: absolute; left: 16px; top: -100px; z-index: 20; background: #fff; color: var(--ink); padding: 12px 16px; border-radius: 8px; }
.skip:focus { top: 12px; }

/* ---------- Bandeau supérieur ---------- */
.topbar { background: var(--bar); color: #fff; position: relative; z-index: 5; font-family: var(--font); font-synthesis: none; }
.topbar *, .topbar *::before, .topbar *::after { box-sizing: border-box; }
.topbar-inner { max-width: 1440px; margin: 0 auto; min-height: 76px; padding: 0 28px; display: flex; align-items: center; justify-content: center; gap: 20px; }
.topbar .topbar-brand { display: none; color: #fff; font-weight: 900; font-style: italic; font-size: 24px; text-decoration: none; letter-spacing: -.5px; }
.topbar .topbar-brand span { color: #ff4b52; }
.topbar .menu-toggle { display: none; }
.topbar #navigation { display: flex; flex-wrap: nowrap; align-items: center; gap: 6px; margin: 0; padding: 0; background: none; }
.topbar #navigation svg { width: 26px; height: 26px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.topbar #navigation svg .fill { fill: currentColor; stroke: none; }
.topbar #navigation a, .topbar .nav-soon { position: relative; display: flex; align-items: center; gap: 10px; margin: 0; padding: 14px 16px; border: 0; border-radius: 10px; background: transparent; font-size: 18px; font-weight: 600; line-height: 1.2; letter-spacing: -.2px; text-decoration: none; color: #f1f1f3; white-space: nowrap; }
.topbar #navigation a:hover { background: #2d2f34; color: #fff; }
.topbar #navigation a[aria-current="page"] { background: transparent; color: #fff; }
.topbar #navigation a[aria-current="page"]::after { content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px; height: 5px; border-radius: 4px; background: var(--red); }
.topbar #navigation a:focus-visible, .topbar .menu-toggle:focus-visible { outline: 3px solid #f0a400; outline-offset: 2px; }
.topbar .nav-sep { width: 1px; height: 30px; background: #55575d; margin: 0 8px; }
.topbar .nav-soon { color: #b9bbc2; cursor: default; }
.topbar .nav-soon small { font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .6px; color: #1f2024; background: #c9cbd1; border-radius: 6px; padding: 2px 5px; }
.topbar .nav-account { background: var(--bar-soft); border-radius: 999px; padding: 10px 18px; }

@media (max-width: 1280px) {
  .topbar #navigation { gap: 2px; }
  .topbar #navigation a, .topbar .nav-soon { font-size: 16px; padding: 12px 11px; gap: 8px; }
  .topbar #navigation svg { width: 22px; height: 22px; }
  .topbar .nav-sep { margin: 0 4px; }
}
/* Tablettes et smartphones : menu repliable */
@media (max-width: 1060px) {
  .topbar-inner { flex-wrap: wrap; justify-content: space-between; min-height: 64px; padding: 8px 20px; gap: 0; }
  .topbar .topbar-brand { display: block; }
  .topbar .menu-toggle { display: flex; align-items: center; gap: 10px; margin: 0; padding: 9px 15px; border: 1px solid #4b4d53; border-radius: 999px; background: var(--bar-soft); color: #fff; font-family: var(--font); font-weight: 700; font-size: 15px; line-height: 1.2; cursor: pointer; }
  .topbar #navigation { display: none; flex-direction: column; align-items: stretch; width: 100%; padding: 8px 0 14px; gap: 2px; }
  .topbar #navigation.is-open { display: flex; }
  .topbar #navigation a, .topbar .nav-soon { font-size: 17px; padding: 13px 12px; }
  .topbar #navigation a[aria-current="page"]::after { left: 0; right: auto; top: 10px; bottom: 10px; width: 4px; height: auto; }
  .topbar .nav-sep { width: 100%; height: 1px; margin: 6px 0; }
  .topbar .nav-account { border-radius: 10px; padding: 13px 12px; background: transparent; }
}

/* ---------- Pied de page ---------- */
footer.site-footer { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px 22px; margin: 0; padding: 26px 20px 34px; border-top: 1px solid var(--line-warm); background: transparent; color: var(--muted); font-family: var(--font); font-size: 14px; }
footer.site-footer p { margin: 0; width: auto; order: 0; font-size: 14px; color: var(--muted); }
footer.site-footer .wordmark { font-weight: 900; font-style: italic; font-size: 22px; letter-spacing: -.5px; text-decoration: none; color: var(--ink); }
footer.site-footer .wordmark span { color: var(--red); }
footer.site-footer .prototype { margin: 0; font-size: 12px; color: var(--muted); padding: 4px 10px; border-radius: 999px; background: #f2ebe4; }

/* ---------- Pages des générateurs : en-tête sobre aux couleurs GeniMath ----------
   Seuls les générateurs ont un élément <header> ; leur logique n'est pas concernée. */
@media screen {
  body > header { background: #fff8f1; color: var(--ink); border-bottom: 1px solid var(--line-warm); }
  body > header h1 { color: var(--ink); }
  body > header nav a { color: #5b4a3d; }
  body > header nav a:hover:not([aria-current=page]) { background: #f5e8da; color: var(--ink); }
  body > header nav a[aria-current=page] { background: var(--page); color: var(--red); box-shadow: inset 0 3px 0 var(--red); }
  body > header .notation-settings, body > header .notation-settings label { color: #3b3c42; }
  body > header .notation-settings select { border-color: #d9c7b5; }
}
@media print {
  .topbar, .skip, footer.site-footer { display: none !important; }
}
@media (prefers-reduced-motion: reduce) {
  .topbar * { transition: none !important; }
}