/* app.css — styles repris de app/revision.html (Artifact), puis complétés pour la plateforme. */
  :root{
    --paper:#fbfaf8;
    --surface:#ffffff;
    --surface-2:#f2efe9;
    --ink:#16202e;
    --ink-2:#53616f;
    --line:#e2ddd3;
    --rail:#14395e;
    --rail-ink:#eef4fa;
    --signal:#b23a2e;
    --signal-ink:#ffffff;
    --good:#2f7d4f;
    --good-bg:#e7f1e9;
    --bad:#b23a2e;
    --bad-bg:#f7e8e5;
    --gold:#a9761f;
    --shadow:0 1px 2px rgba(20,32,48,.06), 0 8px 24px rgba(20,32,48,.06);
    --radius:14px;
  }
  @media (prefers-color-scheme: dark){
    :root:not([data-theme="light"]){
      --paper:#101620;
      --surface:#171f2a;
      --surface-2:#1f2a37;
      --ink:#e8eef6;
      --ink-2:#9db0c2;
      --line:#2b3947;
      --rail:#23517a;
      --rail-ink:#eef4fa;
      --signal:#e2735c;
      --signal-ink:#1b0f0c;
      --good:#63b98d;
      --good-bg:#162c22;
      --bad:#e2735c;
      --bad-bg:#33201c;
      --gold:#d6a94e;
      --shadow:0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
    }
  }
  :root[data-theme="dark"]{
    --paper:#101620;
    --surface:#171f2a;
    --surface-2:#1f2a37;
    --ink:#e8eef6;
    --ink-2:#9db0c2;
    --line:#2b3947;
    --rail:#23517a;
    --rail-ink:#eef4fa;
    --signal:#e2735c;
    --signal-ink:#1b0f0c;
    --good:#63b98d;
    --good-bg:#162c22;
    --bad:#e2735c;
    --bad-bg:#33201c;
    --gold:#d6a94e;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
  }

  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
    line-height:1.55;
    font-size:16px;
  }
  h1,h2,h3{font-family:"Bricolage Grotesque","IBM Plex Sans",sans-serif;font-weight:700;line-height:1.15;text-wrap:balance;margin:0}
  button{font-family:inherit;font-size:inherit;cursor:pointer}
  :focus-visible{outline:3px solid var(--rail);outline-offset:2px;border-radius:4px}
  .mono{font-family:"IBM Plex Mono",ui-monospace,monospace}

  .wrap{max-width:660px;margin:0 auto;padding:0 16px 96px}

  /* ---------- Header ---------- */
  .top{
    position:sticky;top:0;z-index:20;
    background:color-mix(in srgb, var(--paper) 88%, transparent);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--line);
  }
  .top-inner{max-width:660px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:12px}
  .brand{display:flex;align-items:baseline;gap:8px;font-family:"Bricolage Grotesque",sans-serif;font-weight:800;letter-spacing:-.01em}
  .brand b{font-size:1.05rem;color:var(--ink)}
  .brand span{font-size:.72rem;font-weight:600;color:var(--ink-2);text-transform:uppercase;letter-spacing:.08em}
  .top-spacer{flex:1}
  .pill{
    display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
    background:var(--surface-2);border:1px solid var(--line);
    padding:5px 10px;border-radius:999px;font-size:.8rem;font-weight:600;color:var(--ink-2);
    font-variant-numeric:tabular-nums;
  }
  .slow{
    flex:none;padding:6px 10px;border-radius:999px;border:1px solid var(--line);
    background:var(--surface);color:var(--ink-2);font-size:.78rem;font-weight:600;
  }
  .slow:hover{color:var(--ink);border-color:var(--ink-2)}
  .pill .dot{width:8px;height:8px;border-radius:50%;background:var(--gold)}
  .icon-btn{
    display:grid;place-items:center;width:38px;height:38px;
    background:var(--surface);border:1px solid var(--line);border-radius:10px;color:var(--ink-2);
  }
  .icon-btn:hover{color:var(--ink);border-color:var(--ink-2)}
  .icon-btn svg{width:18px;height:18px}

  /* ---------- Hub ---------- */
  .hero{padding:26px 0 8px}
  .hero .eyebrow{font-size:.78rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--signal)}
  .hero h1{font-size:1.9rem;font-weight:800;letter-spacing:-.02em;margin:.25em 0 .15em}
  .hero p{margin:0;color:var(--ink-2);max-width:46ch}

  .weektabs{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap}
  .weektab{
    padding:7px 14px;border-radius:999px;border:1px solid var(--line);
    background:var(--surface);color:var(--ink-2);font-weight:600;font-size:.85rem;
  }
  .weektab:hover{border-color:var(--ink-2);color:var(--ink)}
  .weektab.is-active{background:var(--rail);border-color:var(--rail);color:var(--rail-ink)}

  .weekcard{
    margin-top:20px;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;
  }
  .weekcard-head{
    display:flex;align-items:center;gap:12px;padding:16px 18px;
    background:var(--rail);color:var(--rail-ink);
  }
  .weekcard-head .wk{
    font-family:"IBM Plex Mono",monospace;font-size:.72rem;font-weight:500;
    border:1px solid color-mix(in srgb,var(--rail-ink) 40%,transparent);
    padding:3px 7px;border-radius:6px;letter-spacing:.04em;
  }
  .weekcard-head h2{font-size:1.15rem;font-weight:700}
  .weekcard-head .sub{font-size:.8rem;opacity:.8;margin-left:auto;text-align:right}

  .activities{display:grid;gap:1px;background:var(--line)}
  .tile{
    display:flex;align-items:center;gap:14px;width:100%;text-align:left;
    background:var(--surface);border:0;padding:15px 18px;color:var(--ink);
  }
  .tile:hover{background:var(--surface-2)}
  .tile-ic{flex:none;display:grid;place-items:center;width:42px;height:42px;border-radius:11px;background:var(--surface-2);color:var(--rail)}
  :root[data-theme="dark"] .tile-ic,
  :root:not([data-theme="light"]) .tile-ic{color:var(--rail-ink)}
  @media (prefers-color-scheme:light){:root:not([data-theme="dark"]) .tile-ic{color:var(--rail)}}
  .tile-ic svg{width:22px;height:22px}
  .tile-txt{flex:1;min-width:0}
  .tile-txt b{display:block;font-weight:600;font-size:1rem}
  .tile-txt span{display:block;font-size:.85rem;color:var(--ink-2)}
  .tile-meta{flex:none;display:flex;align-items:center;gap:10px;color:var(--ink-2)}
  .bar{width:56px;height:6px;border-radius:999px;background:var(--surface-2);overflow:hidden;border:1px solid var(--line)}
  .bar i{display:block;height:100%;background:var(--good);width:0}
  .chev{width:16px;height:16px;opacity:.5}

  .note{margin-top:18px;font-size:.86rem;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start}
  .note svg{flex:none;width:16px;height:16px;margin-top:2px;color:var(--gold)}
  .footer{margin-top:30px;padding-top:16px;border-top:1px solid var(--line);font-size:.8rem;color:var(--ink-2)}

  /* ---------- Activity panel ---------- */
  .panel{padding:18px 0 0;animation:fade .25s ease}
  @keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
  .panel-head{display:flex;align-items:center;gap:12px;margin-bottom:8px}
  .back{
    display:inline-flex;align-items:center;gap:6px;background:none;border:0;color:var(--ink-2);
    font-weight:600;font-size:.9rem;padding:6px 4px;
  }
  .back:hover{color:var(--ink)}
  .back svg{width:15px;height:15px}
  .panel h2{font-size:1.35rem;font-weight:800;letter-spacing:-.01em}
  .panel-sub{color:var(--ink-2);font-size:.9rem;margin:2px 0 18px}

  .progress-line{display:flex;align-items:center;gap:12px;margin-bottom:18px}
  .progress-line .bar{flex:1;width:auto;height:8px}
  .progress-line .count{font-size:.82rem;font-weight:600;color:var(--ink-2);font-variant-numeric:tabular-nums}

  /* ---------- Buttons / speaker ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 18px;border-radius:11px;border:1px solid var(--line);
    background:var(--surface);color:var(--ink);font-weight:600;
  }
  .btn:hover{border-color:var(--ink-2)}
  .btn-primary{background:var(--rail);border-color:var(--rail);color:var(--rail-ink)}
  .btn-primary:hover{filter:brightness(1.08)}
  .btn-good{background:var(--good);border-color:var(--good);color:#fff}
  .btn-wide{width:100%}
  .btn[disabled]{opacity:.45;cursor:not-allowed}

  .say{
    display:inline-grid;place-items:center;flex:none;
    width:40px;height:40px;border-radius:50%;
    background:var(--signal);border:0;color:var(--signal-ink);
  }
  .say:hover{filter:brightness(1.08)}
  .say svg{width:17px;height:17px}
  .say.sm{width:32px;height:32px}
  .say.sm svg{width:14px;height:14px}
  .say.is-speaking{animation:pulse 1s ease infinite}
  @keyframes pulse{0%,100%{box-shadow:0 0 0 0 color-mix(in srgb,var(--signal) 45%,transparent)}50%{box-shadow:0 0 0 8px transparent}}

  /* ---------- Flashcards ---------- */
  .deck{perspective:1200px}
  .card{
    position:relative;width:100%;min-height:250px;
    border-radius:18px;border:1px solid var(--line);background:var(--surface);
    box-shadow:var(--shadow);transform-style:preserve-3d;transition:transform .5s cubic-bezier(.2,.7,.2,1);
  }
  .card.flipped{transform:rotateY(180deg)}
  .card-face{
    position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
    gap:14px;padding:26px;backface-visibility:hidden;
  }
  .card-face .grp{position:absolute;top:14px;left:16px;font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.09em;color:var(--ink-2)}
  .card-front .en{font-family:"Bricolage Grotesque",sans-serif;font-weight:700;font-size:2rem;letter-spacing:-.02em;text-align:center}
  .card-front .tap{font-size:.8rem;color:var(--ink-2)}
  .card-back{transform:rotateY(180deg);gap:6px}
  .card-back .fr{font-size:1.5rem;font-weight:700;font-family:"Bricolage Grotesque",sans-serif;text-align:center}
  .card-back .say-fr{font-size:1rem;color:var(--signal);font-weight:600}
  .card-back .ipa{font-size:1rem;color:var(--ink-2)}
  .card-back .enr{margin-top:6px;font-size:.9rem;color:var(--ink-2)}
  .deck-controls{display:flex;gap:10px;margin-top:16px}
  .deck-controls .btn{flex:1}
  .deck-nav{display:flex;align-items:center;justify-content:space-between;margin-top:14px;color:var(--ink-2);font-size:.85rem}
  .deck-nav button{background:none;border:0;color:var(--ink-2);font-weight:600;padding:6px}
  .deck-nav button:hover{color:var(--ink)}

  /* ---------- Options (mcq / sounds) ---------- */
  .q{font-size:1.15rem;font-weight:600;margin:6px 0 4px;text-wrap:balance}
  .q .mono{background:var(--surface-2);padding:1px 6px;border-radius:5px}
  .qhint{font-size:.85rem;color:var(--ink-2);margin-bottom:14px}
  .opts{display:grid;gap:10px}
  .opt{
    display:flex;align-items:center;gap:10px;text-align:left;
    padding:13px 15px;border-radius:11px;border:1px solid var(--line);background:var(--surface);color:var(--ink);font-weight:500;
  }
  .opt:hover:not([disabled]){border-color:var(--ink-2)}
  .opt.is-correct{background:var(--good-bg);border-color:var(--good);color:var(--good)}
  .opt.is-wrong{background:var(--bad-bg);border-color:var(--bad);color:var(--bad)}
  .opt .mark{margin-left:auto;font-weight:700}

  .feedback{margin-top:14px;padding:12px 14px;border-radius:11px;font-size:.9rem;display:none}
  .feedback.show{display:block}
  .feedback.ok{background:var(--good-bg);color:var(--good)}
  .feedback.no{background:var(--bad-bg);color:var(--bad)}

  /* ---------- Fill / dictation input ---------- */
  .field{
    width:100%;padding:13px 15px;border-radius:11px;border:1px solid var(--line);
    background:var(--surface);color:var(--ink);font-size:1.05rem;font-family:inherit;
  }
  .field:focus{outline:3px solid var(--rail);outline-offset:1px}
  .row{display:flex;gap:10px;margin-top:12px}
  .row .btn{flex:none}
  .row .field{flex:1}

  /* ---------- Sorting bins ---------- */
  .word-big{display:flex;align-items:center;justify-content:center;gap:12px;font-family:"Bricolage Grotesque",sans-serif;font-weight:700;font-size:1.8rem;margin:6px 0 18px}
  .bins{display:grid;grid-template-columns:1fr 1fr;gap:12px}
  .bin{
    padding:20px 12px;border-radius:13px;border:1.5px dashed var(--line);background:var(--surface);
    text-align:center;font-weight:700;color:var(--ink);
  }
  .bin .sym{font-size:1.25rem;font-family:"IBM Plex Mono",monospace}
  .bin .lbl{display:block;font-size:.8rem;font-weight:500;color:var(--ink-2);margin-top:2px}
  .bin:hover:not([disabled]){border-color:var(--rail);background:var(--surface-2)}
  .bin.is-correct{border-style:solid;border-color:var(--good);background:var(--good-bg);color:var(--good)}
  .bin.is-wrong{border-style:solid;border-color:var(--bad);background:var(--bad-bg);color:var(--bad)}

  /* ---------- Word order ---------- */
  .tokens,.answer-slot{display:flex;flex-wrap:wrap;gap:8px;min-height:48px}
  .answer-slot{padding:10px;border:1px dashed var(--line);border-radius:11px;background:var(--surface-2);margin-bottom:12px}
  .token{padding:8px 12px;border-radius:9px;border:1px solid var(--line);background:var(--surface);font-weight:600}
  .token:hover{border-color:var(--ink-2)}

  /* ---------- Result ---------- */
  .result{text-align:center;padding:24px 10px}
  .result .big{font-family:"Bricolage Grotesque",sans-serif;font-weight:800;font-size:2.6rem;letter-spacing:-.02em}
  .result .lbl{color:var(--ink-2);margin-bottom:18px}

  .done-tag{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:700;color:var(--good);background:var(--good-bg);padding:3px 9px;border-radius:999px}

  @media (prefers-reduced-motion:reduce){
    *{animation-duration:.001ms!important;transition-duration:.001ms!important}
  }
  @media (max-width:420px){
    .hero h1{font-size:1.6rem}
    .weekcard-head .sub{display:none}
  }

/* ============================================================
   Plateforme : ajouts (navigation, lecteur, connexion, docs, quiz)
   ============================================================ */
a{color:inherit}
a.tile,a.back,a.brand,a.doc{text-decoration:none}
.card-say{position:absolute;right:14px;bottom:14px}
.linklike{background:none;border:0;padding:0;color:var(--ink-2);text-decoration:underline;font-size:inherit}
.loading{color:var(--ink-2);padding:40px 0;text-align:center}

/* sync status dot */
.pill[data-status="ok"] .dot{background:var(--good)}
.pill[data-status="offline"] .dot{background:var(--ink-2)}

/* room for the fixed bottom bars */
.wrap{padding-bottom:calc(110px + env(safe-area-inset-bottom))}
body.has-player .wrap{padding-bottom:calc(190px + env(safe-area-inset-bottom))}
body.logged-out .tabbar,body.logged-out .playerbar,body.logged-out .pill{display:none}

/* bottom tab bar */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  display:grid;grid-template-columns:repeat(4,1fr);
  background:color-mix(in srgb,var(--paper) 92%,transparent);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  padding:6px 8px calc(6px + env(safe-area-inset-bottom));
}
.tabbar a{display:flex;flex-direction:column;align-items:center;gap:3px;padding:6px 0;border-radius:10px;
  color:var(--ink-2);text-decoration:none;font-size:.74rem;font-weight:600}
.tabbar a svg{width:22px;height:22px}
.tabbar a.is-active{color:var(--rail)}
:root[data-theme="dark"] .tabbar a.is-active{color:var(--rail-ink)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tabbar a.is-active{color:var(--rail-ink)}}
@media (min-width:760px){
  .tabbar{max-width:660px;margin:0 auto;left:0;right:0;bottom:12px;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}
}

/* persistent audio player */
.playerbar{
  position:fixed;left:0;right:0;z-index:29;
  bottom:calc(64px + env(safe-area-inset-bottom));
  background:var(--surface);border-top:1px solid var(--line);box-shadow:var(--shadow);
}
@media (min-width:760px){.playerbar{max-width:660px;margin:0 auto;bottom:88px;border:1px solid var(--line);border-radius:14px;overflow:hidden}}
.player-progress{height:4px;background:var(--surface-2);cursor:pointer}
.player-progress i{display:block;height:100%;background:var(--signal);width:0}
.player-inner{display:flex;align-items:center;gap:8px;padding:8px 12px}
.player-info{flex:1;min-width:0;display:flex;flex-direction:column}
.player-info b{font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.player-info span{font-size:.78rem;color:var(--ink-2);font-variant-numeric:tabular-nums}
.playerbar .icon-btn.play{background:var(--signal);border-color:var(--signal);color:var(--signal-ink)}
.rate{flex:none;min-width:44px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);font-weight:700;font-size:.8rem}

/* login */
.login{max-width:380px;margin:12vh auto 0;display:grid;gap:14px;text-align:center}
.login h1{font-size:1.7rem;font-weight:800}
.login p{margin:0;color:var(--ink-2)}

/* documents */
.doc-group{margin-top:22px}
.doc-group h3{font-size:1rem;margin:0 0 8px;color:var(--ink-2)}
.doc-list{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.doc{display:flex;align-items:center;gap:14px;background:var(--surface);padding:13px 16px}
.doc:hover{background:var(--surface-2)}

/* audio view */
.resume{margin-top:18px;justify-content:flex-start;text-align:left}
.resume svg{width:18px;height:18px;flex:none}
.tile.is-current{background:var(--surface-2)}
.tile .pos{font-size:.8rem;font-weight:600;color:var(--gold);font-variant-numeric:tabular-nums}
.offline-row{padding:12px 18px;border-top:1px solid var(--line)}
.offline-row svg,.btn svg{width:17px;height:17px;flex:none}
.weekcard-head .wk svg{width:16px;height:16px;display:block}

/* quiz */
.quiz-setup{margin-top:18px;display:grid;gap:12px}
.quiz-setup h3{font-size:.95rem;margin:6px 0 0;color:var(--ink-2)}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:6px;padding:9px 14px;border-radius:999px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);font-weight:600;font-size:.9rem}
.chip svg{width:16px;height:16px}
.chip.is-active{background:var(--rail);border-color:var(--rail);color:var(--rail-ink)}
.chip[disabled]{opacity:.45;cursor:not-allowed}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;color:var(--ink);cursor:pointer}
.check input{width:20px;height:20px;margin-top:1px;flex:none;accent-color:var(--rail)}
.quiz-card{margin-top:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}
.quiz-fr .q{font-size:1.4rem;margin-top:4px}
.quiz-actions{display:grid;gap:10px;margin-top:16px}
.quiz-actions .row{margin-top:0}
.mic.is-listening{background:var(--signal);border-color:var(--signal);color:var(--signal-ink);animation:pulse 1s ease infinite}
.quiz-feedback .feedback div{margin-top:4px}
@media (max-width:420px){
  .brand b{font-size:.95rem}
  .brand span{display:none}
  .pill{padding:5px 8px}
}