/* imprimer.org — style.css (single stylesheet, ~9 KB, no fonts, no external requests) */
:root{--paper:#fff;--ink:#141414;--ink2:#5a5a5a;--rule:#dadada;--rule2:#f0f0f0;--encre:#1f3a93;--jaune:#fff100;--c:#00aeef;--m:#ec008c;--y:#fff100;--k:#231f20;--measure:70ch;--wrap:1120px}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--paper);color:var(--ink);font:400 1.0625rem/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;text-rendering:optimizeSpeed}
a{color:var(--encre);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--encre);outline-offset:2px}
img,svg{max-width:100%;height:auto;display:block}
/* feuilles A4 en SVG : conserver le ratio quand la largeur est réduite (écran étroit, marges d'impression) */
svg[viewBox="0 0 210 297"]{aspect-ratio:210/297}
svg[viewBox="0 0 297 210"]{aspect-ratio:297/210}
h1,h2,h3{line-height:1.15;letter-spacing:-.01em;margin:0 0 .5em;font-weight:700}
h1{font-size:clamp(1.9rem,4.5vw,2.9rem);letter-spacing:-.02em}
h2{font-size:clamp(1.35rem,2.6vw,1.75rem);margin-top:2.2em}
h3{font-size:1.15rem;margin-top:1.6em}
p,ul,ol,dl{margin:0 0 1.1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 1.25rem}
.prose{max-width:var(--measure)}
.skip{position:absolute;left:-999px;top:0;background:var(--jaune);padding:.5rem 1rem;z-index:99}
.skip:focus{left:1rem}
/* header */
.hdr{border-bottom:1px solid var(--rule)}
.hdr .wrap{display:flex;align-items:center;gap:1.5rem;min-height:64px;flex-wrap:wrap}
.logo{display:inline-flex;align-items:center;gap:.5rem;font-weight:700;font-size:1.2rem;color:var(--ink);text-decoration:none;letter-spacing:-.02em}
.mark{width:22px;height:22px;display:grid;grid-template-columns:1fr 1fr;gap:2px;flex:none}
.mark i{display:block}.mark i:nth-child(1){background:var(--c)}.mark i:nth-child(2){background:var(--m)}.mark i:nth-child(3){background:var(--y)}.mark i:nth-child(4){background:var(--k)}
.nav{margin-left:auto}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:.25rem;flex-wrap:wrap}
.nav a{display:block;padding:.5rem .7rem;color:var(--ink);text-decoration:none;border-radius:4px;font-size:.95rem}
.nav a:hover,.nav a[aria-current]{background:var(--rule2);text-decoration:none}
.nav details{position:relative}.nav summary{cursor:pointer;list-style:none;padding:.5rem .7rem;border-radius:4px;font-size:.95rem}
.nav summary::-webkit-details-marker{display:none}
.nav details[open] summary{background:var(--rule2)}
.nav details ul{position:absolute;right:0;top:100%;background:#fff;border:1px solid var(--rule);min-width:240px;flex-direction:column;padding:.4rem;z-index:5;box-shadow:0 8px 24px rgba(0,0,0,.08)}
@media(max-width:820px){.nav{margin-left:0;width:100%;padding-bottom:.5rem}.nav details ul{position:static;box-shadow:none;border:0;padding-left:1rem}}
/* hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:3rem;align-items:center;padding:3.5rem 0 2.5rem;border-bottom:1px solid var(--rule)}
.hero h1{margin-bottom:.4em}
.hero .lead{font-size:1.2rem;color:var(--ink2);max-width:34ch}
@media(max-width:820px){.hero{grid-template-columns:1fr;gap:2rem;padding-top:2rem}}
.btn{display:inline-block;background:var(--ink);color:#fff;padding:.7rem 1.15rem;border-radius:6px;text-decoration:none;font-weight:600;border:0;font:inherit;font-weight:600;cursor:pointer}
.btn:hover{background:#000;text-decoration:none}
.btn.y{background:var(--jaune);color:var(--ink)}.btn.y:hover{background:#ffe600}
.btn.o{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btns{display:flex;gap:.6rem;flex-wrap:wrap;margin:1.4rem 0}
/* the A4 sheet */
.sheet{aspect-ratio:210/297;background:#fff;border:1px solid var(--rule);box-shadow:0 1px 2px rgba(0,0,0,.06),0 14px 40px -12px rgba(0,0,0,.18);padding:6% 7%;font-size:clamp(.55rem,1.15vw,.8rem);position:relative}
.sheet::before{content:"";position:absolute;inset:3%;border:1px dashed var(--rule)}
.sheet h2{margin:0 0 .6em;font-size:2.2em;letter-spacing:-.02em}
.sheet .cal td{height:7.4em}
.sheet .notes{margin-top:1.4em;border-top:1.5px solid var(--ink);padding-top:.4em;color:var(--ink2)}
.cal{width:100%;border-collapse:collapse;table-layout:fixed}
.cal th{font-weight:600;color:var(--ink2);padding:.4em 0;border-bottom:1.5px solid var(--ink);text-align:left;font-size:.9em}
.cal td{height:3.2em;vertical-align:top;padding:.3em .2em;border-bottom:1px solid var(--rule)}
.cal td.f{color:var(--m);font-weight:700}.cal td.we{color:var(--ink2)}
.cal td.o{color:#767676}
.cal .n{font-weight:600}
.cal.big td{height:5.5rem;font-size:1rem}
/* sections & lists */
.sec{padding:2.5rem 0;border-bottom:1px solid var(--rule)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:1.5rem 2rem;margin:1.5rem 0}
.grid h3{margin:0 0 .3em;font-size:1.05rem}
.grid p{color:var(--ink2);font-size:.95rem;margin:0}
.grid a.t{color:var(--ink);text-decoration:none;font-weight:700;font-size:1.1rem}
.grid a.t:hover{text-decoration:underline}
.grid .b{border-top:2px solid var(--ink);padding-top:.8rem}
.cols{columns:3;column-gap:2.5rem}
.cols ul{list-style:none;padding:0;margin:0}
.cols li{break-inside:avoid;padding:.3rem 0;border-bottom:1px solid var(--rule2)}
@media(max-width:820px){.cols{columns:2}}@media(max-width:520px){.cols{columns:1}}
.idx{list-style:none;padding:0;margin:0;columns:3;column-gap:2.5rem}
.idx li{break-inside:avoid;padding:.3rem 0;border-bottom:1px solid var(--rule2)}
@media(max-width:820px){.idx{columns:2}}@media(max-width:520px){.idx{columns:1}}
.crumb{font-size:.9rem;color:var(--ink2);padding:1rem 1.25rem 0;margin:0 auto}
.crumb ol{list-style:none;padding:0;margin:0;display:flex;gap:.5rem;flex-wrap:wrap}
.crumb li+li::before{content:"/";margin-right:.5rem;color:var(--rule)}
.meta{color:var(--ink2);font-size:.9rem}
/* aside: matériel (affiliation) */
.aff{border:1.5px solid var(--ink);padding:1.25rem 1.5rem;margin:2rem 0;max-width:var(--measure)}
.aff h2,.aff h3{margin-top:0}
.aff ul{padding-left:1.1rem;margin-bottom:.5rem}
.aff small{color:var(--ink2);display:block}
/* FAQ */
.faq details{border-top:1px solid var(--rule);padding:.7rem 0}
.faq details:last-child{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;font-weight:600;padding:.3rem 0}
.faq p{margin:.5rem 0 0;color:var(--ink2)}
/* tables (multiplication etc.) */
.tbl{border-collapse:collapse;width:100%;max-width:var(--measure);margin:1rem 0 1.5rem;font-variant-numeric:tabular-nums}
.tbl th,.tbl td{border:1px solid var(--rule);padding:.45rem .7rem;text-align:right}
.tbl th{background:var(--rule2);text-align:left}
.mul{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:1.25rem}
.mul table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.mul caption{font-weight:700;text-align:left;padding:.3rem 0;border-bottom:2px solid var(--ink)}
.mul td{padding:.2rem .3rem;border-bottom:1px solid var(--rule2)}
.mul td:last-child{text-align:right;font-weight:600}
.pyth{border-collapse:collapse;font-size:.9rem;font-variant-numeric:tabular-nums}
.pyth th,.pyth td{border:1px solid var(--rule);padding:.3rem .45rem;text-align:right;min-width:2.3rem}
.pyth th{background:var(--rule2)}
.year{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:2rem 2.5rem;margin:1.5rem 0}
.year h3{margin:0 0 .4rem;font-size:1.15rem}
.year .cal td{height:2.4rem;font-size:.95rem}
.year .cal th{font-size:.8rem}
.print-only{display:none}
/* figures (coloriages, dessins, planches SVG) */
figure{margin:1.5rem 0;max-width:var(--wrap)}
figure svg{margin:0 auto}
figcaption{color:var(--ink2);font-size:.95rem;margin-top:.5rem}
/* footer */
.ftr{padding:2.5rem 0;color:var(--ink2);font-size:.92rem}
.ftr .grid{margin:0 0 2rem}
.ftr ul{list-style:none;padding:0;margin:0}
.ftr li{padding:.15rem 0}
.ftr a{color:var(--ink2)}
.ftr .disc{border-top:1px solid var(--rule);padding-top:1.25rem;max-width:var(--measure)}
/* print: only the printable block prints */
@media print{
  body{font-size:11pt;color:#000}
  .hdr,.nav,.ftr,.crumb,.btns,.aff,.faq,.noprint,.grid,.idx,.hero .lead,.hero h1,.hero p{display:none!important}
  .wrap{max-width:none;padding:0}
  .hero{display:block;padding:0;border:0}
  .sheet{box-shadow:none;border:0;aspect-ratio:auto;padding:0;font-size:12pt}
  .sheet::before{display:none}
  .cal td{height:5.5em}
  .print-only{display:block;position:fixed;bottom:0;left:0;margin:0;font-size:7pt;line-height:1;color:#888}
  .year{grid-template-columns:repeat(3,1fr);gap:1rem}
  .year .cal td{height:1.9rem;font-size:9pt}
  .sec{border:0;padding:0}
  .tbl{font-size:10pt}
  .tbl th,.tbl td{padding:.28rem .5rem}
  tr,figure{break-inside:avoid}
  thead{display:table-header-group}
  a{color:#000;text-decoration:none}
  @page{size:A4;margin:12mm}
  .pb{page-break-before:always}
  .sec:has(>.idx),.sec:has(>.grid),h2:has(+.idx),h2:has(+.grid){display:none!important}
  /* explications (sans tableau, SVG ni liste numérotée) : hors impression, sauf sur les guides (p.meta) et les corrigés (.pb) */
  main:not(:has(p.meta)) section.prose:not(.pb):not(:has(table,svg,ol)){display:none!important}
  /* feuille A4 en SVG : seule la feuille s'imprime, sans titre ni légende, une par page */
  section:has(>figure>svg[viewBox="0 0 210 297"])>:not(figure),section:has(>svg[viewBox="0 0 210 297"])>:not(svg),figure:has(>svg[viewBox="0 0 210 297"])>figcaption,
  section:has(>figure>svg[viewBox="0 0 297 210"])>:not(figure),section:has(>svg[viewBox="0 0 297 210"])>:not(svg),figure:has(>svg[viewBox="0 0 297 210"])>figcaption,
  section:has(>figure>svg[viewBox="0 0 186 270"])>:not(figure),section:has(>svg[viewBox="0 0 186 270"])>:not(svg),figure:has(>svg[viewBox="0 0 186 270"])>figcaption{display:none!important}
  .year{gap:.6rem 1.2rem}
  .year h3{font-size:10pt;margin:0 0 .2rem}
  .year .cal th{padding:.15em 0}
  figure{margin:0;page-break-inside:avoid}
  figure svg{max-height:270mm}
}