:root{
  --paper:#EEF2EF; --sheet:#FFFFFF; --ink:#16241F; --ink-2:#56665F; --line:#D5DFDA;
  --pen:#17705B; --pen-2:#E0F0EA; --on-pen:#FFFFFF;
  --red:#B8342A; --red-2:#FBE7E4; --green:#1D6E3F; --green-2:#E1F2E6;
  --hl:#FFE24A; --hl-soft:rgba(255,226,74,.55); --hl-ink:#16241F;
  --rule:#CFE0D8; --margin:#E59A92;
  --serif:"Literata", Georgia, "Times New Roman", serif;
  --sans:"Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  --mono:ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme:light;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --paper:#0E1714; --sheet:#16231F; --ink:#E3EEE9; --ink-2:#9DB2A9; --line:#29403A;
    --pen:#6CD3B2; --pen-2:#1C3A32; --on-pen:#0E1714;
    --red:#FF8A7C; --red-2:#3A1F23; --green:#6BD69A; --green-2:#173426;
    --hl:rgba(240,206,60,.42); --hl-soft:rgba(240,206,60,.25); --hl-ink:#F4F0DC;
    --rule:#243832; --margin:#8A4545;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#0E1714; --sheet:#16231F; --ink:#E3EEE9; --ink-2:#9DB2A9; --line:#29403A;
  --pen:#6CD3B2; --pen-2:#1C3A32; --on-pen:#0E1714;
  --red:#FF8A7C; --red-2:#3A1F23; --green:#6BD69A; --green-2:#173426;
  --hl:rgba(240,206,60,.42); --hl-soft:rgba(240,206,60,.25); --hl-ink:#F4F0DC;
  --rule:#243832; --margin:#8A4545;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:inherit}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 var(--sans);min-height:100%}
:focus-visible{outline:3px solid var(--pen);outline-offset:2px;border-radius:4px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
[hidden]{display:none!important}

/* En-tête et onglets */
.top{max-width:860px;margin:0 auto;padding:18px 20px 6px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-family:var(--serif);font-weight:600;font-size:21px;letter-spacing:-.01em;display:flex;align-items:center;gap:12px;white-space:nowrap}
.brand-mark{width:12px;height:22px;border-radius:2px;background:var(--pen);box-shadow:5px 0 0 var(--hl)}
.account-link{font-family:var(--sans);font-size:14.5px;font-weight:700;color:var(--ink-2);text-decoration:none;padding:6px 8px;border-radius:6px}
.account-link:hover{color:var(--ink);background:var(--pen-2)}
.tabs{display:flex;gap:2px;flex-wrap:wrap;justify-content:flex-end}
.tabs a{color:var(--ink-2);text-decoration:none;font-weight:700;font-size:15px;padding:8px 8px;border-radius:6px}
.tabs a:hover{color:var(--ink)}
.tabs a[aria-current="page"]{color:var(--ink);background:linear-gradient(transparent 58%,var(--hl) 58%,var(--hl) 88%,transparent 88%)}
@media (min-width:860px){
  .brand{display:grid;grid-template-columns:auto auto;column-gap:12px;align-items:center}
  .brand-mark{grid-row:span 2}
  .account-link{font-size:13px;line-height:1.3;padding:0}
  .account-link:hover{background:none;text-decoration:underline}
}
@media (max-width:859px){
  .tabs{position:fixed;left:0;right:0;bottom:0;z-index:20;background:var(--sheet);border-top:1px solid var(--line);padding:4px 2px calc(4px + env(safe-area-inset-bottom,0px));justify-content:space-around;flex-wrap:nowrap}
  .tabs a{flex:1;text-align:center;font-size:12px;padding:12px 1px}
  body{padding-bottom:64px}
}
@media (max-width:420px){.tabs a{font-size:10.5px}}
main{max-width:860px;margin:0 auto;padding:4px 20px 56px}
main:focus{outline:none}

/* Texte */
h1{font-family:var(--serif);font-weight:600;font-size:clamp(28px,6vw,38px);line-height:1.15;letter-spacing:-.015em;margin:20px 0 8px}
h2{font-family:var(--serif);font-weight:600;font-size:23px;line-height:1.25;margin:36px 0 10px}
h3{font-size:17px;margin:22px 0 6px}
h4{font-size:15.5px;margin:18px 0 4px;color:var(--ink-2)}
p{margin:0 0 12px}
.lead{color:var(--ink-2);max-width:66ch;margin:0 0 18px}
.small{font-size:14.5px;color:var(--ink-2)}
.date{font-size:15px;color:var(--ink-2);margin-top:22px}
.date::first-letter{text-transform:uppercase}
.tip{border-left:3px solid var(--red);padding:3px 0 3px 13px}
.empty{padding:22px 0;color:var(--ink-2)}
.level{display:inline-block;font-size:13.5px;font-weight:700;padding:3px 10px;border-radius:999px;background:var(--pen-2);color:var(--pen)}

/* Boutons */
button{font:inherit;color:inherit}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:16px;line-height:1.2;padding:12px 18px;border-radius:8px;border:1.5px solid var(--pen);background:var(--pen);color:var(--on-pen);cursor:pointer;text-decoration:none;min-height:46px}
.btn:hover{filter:brightness(1.07)}
.btn.ghost{background:transparent;color:var(--pen)}
.btn.quiet{background:transparent;border-color:var(--line);color:var(--ink)}
.btn.no{background:transparent;border-color:var(--red);color:var(--red)}
.btn.sm{padding:7px 12px;min-height:36px;font-size:14.5px}
.btn:disabled{opacity:.5;cursor:default;filter:none}
.linkbtn{background:none;border:0;padding:6px 0;color:var(--pen);font-weight:700;cursor:pointer;font-size:15.5px;text-decoration:none}
.linkbtn:hover{text-decoration:underline}
.row-actions{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0}

/* Accueil : séance du jour */
.steps{list-style:none;margin:18px 0 10px;padding:0;background:var(--sheet);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.steps li{display:grid;grid-template-columns:54px 1fr auto;align-items:center;column-gap:16px;padding:0 16px 0 0;border-bottom:1px solid var(--line)}
.steps li:last-child{border-bottom:0}
.steps .num{font-family:var(--serif);font-size:23px;color:var(--red);align-self:stretch;display:flex;align-items:center;justify-content:center;border-right:2px solid var(--margin);padding:18px 0}
.steps .txt{padding:14px 0}
.steps .txt b{display:block;font-size:17px}
.steps .txt span{font-size:15px;color:var(--ink-2)}
@media (max-width:520px){
  .steps li{grid-template-columns:44px 1fr}
  .steps .num{grid-row:span 2}
  .steps .go{grid-column:2;padding-bottom:14px}
  .steps .txt{padding-bottom:8px}
}
.stats{display:flex;flex-wrap:wrap;gap:6px 26px;font-size:15px;color:var(--ink-2);margin:18px 0 4px}
.stats b{color:var(--ink);font-family:var(--serif);font-size:21px;font-weight:600;margin-right:5px}

/* Listes */
.rows{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.rows>li{display:flex;align-items:center;gap:14px;padding:14px 2px;border-bottom:1px solid var(--line)}
.rows .grow{flex:1;min-width:0}
.rows .t{font-weight:700;color:var(--ink);text-decoration:none}
.rows a.t:hover{text-decoration:underline}
.rows .d{font-size:14.5px;color:var(--ink-2)}
.rows .acts{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
@media (max-width:560px){.rows>li{flex-wrap:wrap}.rows .acts{width:100%;justify-content:flex-start}}
.ok-mark{color:var(--green);font-weight:700;font-size:14.5px;white-space:nowrap}
.bad-mark{color:var(--red);font-weight:700;font-size:14.5px;white-space:nowrap}
.meter{height:4px;background:var(--line);border-radius:2px;overflow:hidden;margin-top:7px;max-width:260px}
.meter>i{display:block;height:100%;background:var(--pen)}
.progress{height:5px;background:var(--line);border-radius:3px;overflow:hidden;margin-bottom:18px}
.progress>i{display:block;height:100%;background:var(--pen);transition:width .25s}
.q-count{font-size:14.5px;color:var(--ink-2);font-weight:700;margin-top:20px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 18px}
.chip{display:inline-flex;align-items:center;padding:6px 12px;border:1.5px solid var(--line);border-radius:999px;font-size:14.5px;background:var(--sheet);color:var(--ink-2);font-weight:700;text-decoration:none}
.chip[aria-pressed="true"]{border-color:var(--pen);background:var(--pen-2);color:var(--pen)}

/* Panneaux, fiches */
.panel{background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:18px 22px;margin:18px 0}
.h-panel{margin-top:0}
.lesson{background:var(--sheet);border:1px solid var(--line);border-radius:10px;padding:8px 22px 10px;margin:8px 0 20px}
.lesson p,.lesson li{max-width:70ch}
.lesson ul,.lesson ol{padding-left:22px}
.lesson li{margin-bottom:6px}
details{border-top:1px solid var(--line);padding:14px 0}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:700;font-size:17px}
details[open] summary{margin-bottom:10px}

/* Tableaux */
.scroll{overflow-x:auto;max-width:100%}
.tbl{border-collapse:collapse;margin:6px 0 16px;font-size:15.5px}
.tbl th,.tbl td{text-align:left;padding:7px 14px 7px 0;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{color:var(--ink-2);font-size:13.5px}
.amt{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap;display:inline-block;width:100%}
td.amt,th.amt{display:table-cell;width:auto}
.tbl th.amt,.jtable th.amt,.entry th.amt{text-align:right}
.jtable td:nth-child(2){min-width:200px}
.doc-t td:first-child{width:100%}

/* Pièces comptables */
.doc{background:var(--sheet);border:1px solid var(--line);border-radius:8px;max-width:440px;margin:10px 0 16px;box-shadow:0 14px 28px -24px rgba(10,40,30,.6)}
.doc-h{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:10px 14px;border-bottom:2px solid var(--margin);font-size:15px}
.doc-h span{font-size:13px;color:var(--ink-2)}
.doc-t{width:100%;border-collapse:collapse;font-size:15.5px}
.doc-t td{padding:6px 14px;border-bottom:1px solid var(--line)}
.doc-t tr:last-child td{border-bottom:0}
.doc-t tr.tot td{font-weight:700}
.doc-t td.amt{text-align:right}
.ops{padding-left:22px}
.ops li{margin-bottom:6px}

/* Exercice */
.statement{margin:6px 0 4px}
.statement p{max-width:70ch}
.part{border-top:1px dashed var(--line);padding:14px 0 6px;margin-top:10px}
.pprompt{font-weight:700}
.part.is-ok .pprompt::before{content:"✓ ";color:var(--green)}
.part.is-bad .pprompt::before{content:"✗ ";color:var(--red)}

/* Saisie d’écriture */
.entry{border-collapse:collapse;min-width:520px;width:100%;max-width:720px}
.entry th{font-size:13.5px;color:var(--ink-2);text-align:left;padding:4px 6px;border-bottom:2px solid var(--line)}
.entry td{padding:4px 6px;border-bottom:1px solid var(--line);vertical-align:top}
.entry td:first-child{width:46%}
.entry tfoot td{font-weight:700;border-bottom:0;padding-top:8px}
.entry .bal{text-align:center;font-size:18px}
.entry .bal.ok{color:var(--green)}
.entry .bal.bad{color:var(--red)}
.cell{width:100%;font:inherit;font-size:16px;padding:7px 8px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--ink)}
.cell:focus{outline:none;border-color:var(--pen);box-shadow:0 0 0 2px var(--pen-2)}
.cell.acct{font-family:var(--mono);max-width:150px}
.cell.num{text-align:right;font-variant-numeric:tabular-nums;min-width:96px}
.aname{display:block;font-size:12.5px;color:var(--ink-2);margin-top:2px;min-height:1em}
.x{border:0;background:transparent;font-size:20px;color:var(--ink-2);cursor:pointer;width:34px;height:34px;border-radius:6px}
.x:hover{background:var(--red-2);color:var(--red)}
.jtable{border-collapse:collapse;font-size:15px;margin:6px 0 12px;min-width:480px}
.jtable th{font-size:13px;color:var(--ink-2);text-align:left;padding:5px 12px 5px 0;border-bottom:2px solid var(--line)}
.jtable td{padding:6px 12px 6px 0;border-bottom:1px solid var(--line)}
.jtable td.acct{font-family:var(--mono)}
.jtable tr.ok .mark{color:var(--green);font-weight:700}
.jtable tr.bad td{color:var(--red)}
.jtable .mark{font-size:13.5px}

/* Valeurs, choix, classements */
.nfields,.sfields{display:grid;gap:10px;margin:6px 0}
.nrow,.srow{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:4px 14px;align-items:center}
.nrow label,.srow label{font-size:15.5px}
.nin{display:flex;align-items:center;gap:6px}
.unit{color:var(--ink-2);font-weight:700;min-width:1.5em}
.nfb{grid-column:2;font-size:14px;font-weight:700}
.nfb:empty{display:none}
.nrow:has(.ok) .nfb,.srow:has(.ok) .nfb{color:var(--green)}
.nrow:has(.bad) .nfb,.srow:has(.bad) .nfb{color:var(--red)}
@media (max-width:560px){.nrow,.srow{grid-template-columns:1fr}.nfb{grid-column:1}}
.input{display:block;width:100%;font:inherit;font-size:16px;padding:9px 11px;border:1px solid var(--line);border-radius:8px;background:var(--sheet);color:var(--ink)}
.input.num{text-align:right;font-variant-numeric:tabular-nums;max-width:220px}
.input:focus{outline:none;border-color:var(--pen);box-shadow:0 0 0 2px var(--pen-2)}
.input.ok{border-color:var(--green);background:var(--green-2)}
.input.bad{border-color:var(--red);background:var(--red-2)}
select.input{appearance:auto}
.groups .srow label{font-family:var(--mono);font-size:14px}
.exopts{display:grid;gap:6px;margin:6px 0}
.exopts label{display:flex;gap:10px;align-items:center;padding:9px 12px;border:1.5px solid var(--line);border-radius:8px;background:var(--sheet);cursor:pointer;font-size:16px}
.exopts label:hover{border-color:var(--pen)}
.exopts input{accent-color:var(--pen);width:18px;height:18px;flex:none}
.exopts .ok{border-color:var(--green);background:var(--green-2)}
.exopts .bad{border-color:var(--red);background:var(--red-2)}
.exopts .miss{border-color:var(--red);border-style:dashed}
.exopts .small{margin-left:auto;color:var(--red);font-weight:700}

/* Retours */
.fb{margin-top:14px;padding:10px 13px;border-radius:8px;font-size:16px;animation:show .2s ease-out}
.fb.ok{background:var(--green-2);color:var(--green)}
.fb.bad{background:var(--red-2);color:var(--red)}
.fb b{font-family:var(--serif);font-size:19px}
.explain h3{margin-top:0}
.ai-box{margin-top:6px}
.ai-answer{border-left:3px solid var(--pen);padding:2px 0 2px 14px}
.ai-answer p{white-space:pre-wrap;max-width:70ch}
.busy{display:flex;align-items:center;gap:12px;color:var(--ink-2)}
.dot{width:10px;height:10px;border-radius:50%;background:var(--pen);animation:pulse 1s ease-in-out infinite}
@keyframes pulse{50%{opacity:.25}}
@keyframes show{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
.exscore{font-family:var(--serif);font-size:24px;margin:4px 0 12px}
.exscore b{font-size:44px;font-weight:600}
.field{width:100%;font:inherit;font-size:17px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--sheet);color:var(--ink);resize:vertical}
.fld-label{display:block;font-size:14px;font-weight:700;color:var(--ink-2);margin:12px 0 6px}
.toast{position:fixed;top:calc(14px + env(safe-area-inset-top,0px));left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:8px;font-size:15px;z-index:40;max-width:calc(100% - 32px);animation:show .18s ease-out}
.toggle{display:flex;gap:12px;align-items:center;font-weight:700;cursor:pointer}
.check{width:22px;height:22px;accent-color:var(--pen);flex:none;cursor:pointer}
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

/* Petits écrans : les tableaux d’énoncé défilent plutôt que de s’écraser ; la saisie tient sur la largeur. */
.statement .tbl{min-width:440px}
@media (max-width:560px){
  .entry{min-width:0}
  .entry td,.entry th{padding:4px 3px}
  .entry td:first-child{width:38%}
  .cell{font-size:15px;padding:6px 6px}
  .cell.num{min-width:0}
  .x{width:28px}
}