/* AubeSchool, utilitaire suisse, palette partagée avec la suite Aube.
   Blanc de travail en clair, noir mat en sombre, un seul accent. Inter (UI),
   JetBrains Mono (codes, étiquettes). Filets 1 px, pas d'ombres lourdes,
   pas de serif, aucun texte penché. */

:root{
  /* Thème clair de travail : blanc professionnel (canevas gris froid très
     clair, cartes blanches), fini le papier beige. */
  --bg:#f6f7f9; --bg2:#ffffff;
  --surf:#ffffff; --surf2:#f4f6f8; --surf3:#e9ecf0;
  --line:#e3e6eb; --line2:#c9cfd8;
  --ink:#16181d; --ink-dim:#3a3f48; --muted:#697180; --faint:#98a0ac;
  --accent:#2d5cc8; --accent-h:#1e4cb4; --accent-dim:rgba(45,92,200,.12);
  --ok:#2d6a4f; --ok-bg:rgba(45,106,79,.12);
  --late:#bf4630; --late-bg:rgba(191,70,48,.10);
  --err-bg:rgba(191,70,48,.09); --err-line:rgba(191,70,48,.34); --err-ink:#a63a27;
  --c-bleu:#2d5cc8; --c-vert:#2d6a4f; --c-terre:#b4552d;
  --c-violet:#7248bb; --c-cyan:#1b7f95; --c-rouge:#bf4630;
  --star:rgba(45,92,200,.34);
  --ui:"Inter",system-ui,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --r:8px;
}

:root[data-theme="dark"]{
  /* Sombre mat et neutre : noir de travail, surfaces graphite, sans bleu. */
  --bg:#0e0f11; --bg2:#0a0b0d;
  --surf:#151618; --surf2:#1c1d20; --surf3:#242629;
  --line:#26282c; --line2:#383b41;
  --ink:#f2f3f5; --ink-dim:#c9ccd2; --muted:#8c9098; --faint:#676b74;
  --accent:#5b8ae8; --accent-h:#7ba4f2; --accent-dim:rgba(91,138,232,.18);
  --ok:#5cbb84; --ok-bg:rgba(92,187,132,.16);
  --late:#e07060; --late-bg:rgba(224,112,96,.14);
  --err-bg:rgba(224,112,96,.14); --err-line:rgba(224,112,96,.42); --err-ink:#f0b4a8;
  --c-bleu:#6c9bee; --c-vert:#5cbb84; --c-terre:#e79a5c;
  --c-violet:#a684f0; --c-cyan:#4fb8cd; --c-rouge:#e07060;
  --star:rgba(255,255,255,.42);
}

*{box-sizing:border-box}
html,body{margin:0}
/* L'attribut hidden vaut aussi pour les <svg> (les navigateurs ne l'appliquent
   qu'aux éléments HTML) : icônes soleil/lune, œil du mot de passe. */
[hidden]{display:none!important}
body{background-color:var(--bg);background-image:var(--fond,none);background-size:var(--fond-size,auto);background-position:center top;background-repeat:var(--fond-repeat,no-repeat);background-attachment:fixed;color:var(--ink);font-family:var(--ui);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-h)}
button{font-family:inherit;cursor:pointer}
input:where(:not([type=checkbox]):not([type=radio])),textarea{font-family:inherit;font-size:14px;color:var(--ink);background:var(--surf);border:1px solid var(--line);border-radius:6px;padding:8px 10px}
input[type=checkbox],input[type=radio]{accent-color:var(--accent);width:16px;height:16px}
input:focus,textarea:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim)}
textarea{resize:vertical}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.tiny{font-size:11.5px}
.ml-auto{margin-left:auto}
.inline{display:inline}
.faint{color:var(--faint)}
em,i{font-style:normal}
.eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 6px}
::selection{background:var(--accent-dim)}

/* Bandes de couleur des classes */
.band-bleu{--band:var(--c-bleu)} .band-vert{--band:var(--c-vert)}
.band-terre{--band:var(--c-terre)} .band-violet{--band:var(--c-violet)}
.band-cyan{--band:var(--c-cyan)} .band-rouge{--band:var(--c-rouge)}

/* ---------- Boutons ---------- */
.btn-primary{background:var(--accent);color:#fff;border:0;border-radius:7px;padding:8px 15px;font-weight:600;font-size:13px;display:inline-flex;align-items:center;gap:8px;transition:background .15s}
.btn-primary:hover{background:var(--accent-h)}
.btn-primary.big{padding:11px 20px;font-size:14px}
.btn-ghost{background:transparent;color:var(--ink-dim);border:1px solid var(--line2);border-radius:7px;padding:7px 13px;font-weight:500;font-size:13px;display:inline-flex;align-items:center;gap:7px}
.btn-ghost:hover{border-color:var(--accent);color:var(--ink)}
.btn-ghost.tiny{padding:4px 10px;font-size:12px}
.btn-ghost.big{padding:10px 18px;font-size:14px}
.danger{color:var(--late)}
.btn-ghost.danger:hover{border-color:var(--late)}
.icon-btn{background:transparent;border:1px solid var(--line);border-radius:6px;color:var(--ink-dim);width:28px;height:28px;display:inline-grid;place-items:center;font-size:13px}
.icon-btn:hover{border-color:var(--accent)}
.icon-btn.sm{width:24px;height:24px;font-size:12px}
.ic{display:block}
.arrow{font-family:var(--mono)}

/* ---------- Barre du haut ---------- */
.topbar{display:flex;align-items:center;gap:16px;height:52px;padding:0 18px;background:var(--bg2);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.monogram{position:relative;width:32px;height:32px;border-radius:8px;background:var(--surf2);border:1px solid var(--line);display:grid;place-items:center;font-weight:700;font-size:17px;color:var(--ink)}
.monogram.sm{width:26px;height:26px;font-size:14px}
.stamp{position:absolute;top:-4px;right:-4px;font-size:10px;color:var(--accent)}
.brand-name{font-weight:600;letter-spacing:.01em}
.topbar-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.user-chip{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-dim)}
.avatar{position:relative;overflow:hidden;width:26px;height:26px;border-radius:50%;background:var(--accent-dim);color:var(--accent);display:inline-grid;place-items:center;font-weight:600;font-size:12px;flex:none}
.avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.avatar.sm{width:22px;height:22px;font-size:11px}

/* ---------- Flash ---------- */
/* Les messages se posent en bas de l'écran : ils ne couvrent jamais l'entête. */
.flash-wrap{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:80;display:flex;flex-direction:column;gap:8px;width:min(480px,92vw)}
.flash{padding:10px 13px;border-radius:8px;font-size:13px;border:1px solid var(--line2);background:var(--surf);color:var(--ink);animation:flashin .2s ease}
.flash.ok{border-color:var(--ok);background:var(--ok-bg)}
.flash.err{background:var(--err-bg);border-color:var(--err-line);color:var(--err-ink)}
@keyframes flashin{from{opacity:0;transform:translateY(8px)}to{opacity:1}}

/* ---------- Coquille ---------- */
.shell{max-width:960px;margin:0 auto;padding:28px 20px 80px}
.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;flex-wrap:wrap}
.page-title{font-size:26px;font-weight:700;letter-spacing:-.02em;margin:0}
.page-actions{display:flex;gap:10px;flex-wrap:wrap}
.section-title{font-size:15px;font-weight:600;color:var(--muted);margin:34px 0 12px;text-transform:uppercase;letter-spacing:.08em;font-family:var(--mono);font-size:11.5px}
.row-end{display:flex;justify-content:flex-end;margin-bottom:14px}

.empty{border:1px dashed var(--line2);border-radius:var(--r);padding:44px 24px;text-align:center;margin:30px 0}
.empty.slim{padding:26px 20px;margin:0}
.empty-title{font-size:22px;font-weight:700;margin:0 0 8px}
.empty-text{color:var(--muted);max-width:52ch;margin:0 auto 6px}
.empty .page-actions{justify-content:center;margin-top:16px}

/* ---------- Cartes de classes ---------- */
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.course-card{position:relative;display:flex;flex-direction:column;gap:4px;background:var(--surf);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 14px;color:var(--ink);overflow:hidden;transition:border-color .15s}
.course-card:hover{border-color:var(--band);color:var(--ink)}
.cc-band{position:absolute;top:0;left:0;right:0;height:4px;background:var(--band)}
.cc-name{font-weight:600;font-size:15px;margin-top:4px}
.cc-meta{color:var(--muted);font-size:12.5px}
.cc-foot{display:flex;align-items:center;gap:6px 8px;margin-top:12px;flex-wrap:wrap}
.cc-code{margin-left:auto;font-size:12px;color:var(--band);letter-spacing:.08em}
.course-card.archived{opacity:.6}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;border:1px solid var(--line2);border-radius:20px;padding:2px 9px;color:var(--ink-dim);white-space:nowrap}
.chip-prof{border-color:var(--band,var(--accent));color:var(--band,var(--accent))}
.chip-ok{border-color:var(--ok);color:var(--ok);background:var(--ok-bg)}
.chip-late{border-color:var(--late);color:var(--late);background:var(--late-bg)}
.chip-todo{border-color:var(--accent);color:var(--accent);background:var(--accent-dim)}

/* ---------- Dialogues ---------- */
.dlg{border:1px solid var(--line2);border-radius:12px;background:var(--surf);color:var(--ink);padding:0;width:min(480px,94vw)}
.dlg::backdrop{background:rgba(20,18,12,.45)}
:root[data-theme="dark"] .dlg::backdrop{background:rgba(4,6,10,.6)}
.dlg-form{display:flex;flex-direction:column;gap:13px;padding:18px 20px 20px}
.dlg-head{display:flex;align-items:center;justify-content:space-between;font-size:15px;margin-bottom:2px}
.dlg-foot{display:flex;justify-content:flex-end;gap:10px;margin-top:4px}
.dlg-hint{color:var(--muted);font-size:13px;margin:0}
.dlg-attach{border-top:1px solid var(--line);padding:12px 20px 16px;display:flex;flex-direction:column;gap:6px}
.attach-line{display:flex;align-items:center;gap:10px;font-size:12.5px}
.attach-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fld{display:flex;flex-direction:column;gap:5px;font-size:12.5px;font-weight:500;color:var(--ink-dim)}
.fld input,.fld textarea{font-weight:400}
.fld-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.fld.slim{flex:none;width:110px}
.fld.grow{flex:1;width:auto}
.fld-label{font-size:12.5px;font-weight:500;color:var(--ink-dim)}
.code-input{text-transform:uppercase;letter-spacing:.35em;font-size:18px;text-align:center}
.stack{display:flex;flex-direction:column;gap:13px}

/* ---------- Entête de classe ---------- */
.course-head{position:relative;background-color:var(--surf);background-image:var(--motif,none);background-size:var(--motif-size,auto);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;margin-bottom:20px}
.ch-band{display:block;height:6px;background:var(--band)}
.ch-main{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px 20px 12px;flex-wrap:wrap}
.ch-name{font-size:24px;font-weight:700;letter-spacing:-.02em;margin:0}
.ch-meta{color:var(--muted);margin:3px 0 0;font-size:13px}
.ch-code{display:flex;flex-direction:column;align-items:flex-end;gap:5px}
.ch-code-label{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.code-pill{background:var(--accent-dim);border:1px solid var(--band,var(--accent));color:var(--band,var(--accent));border-radius:7px;padding:5px 12px;font-size:15px;letter-spacing:.18em;font-weight:600}
.code-pill:hover{filter:brightness(1.08)}
.code-pill.big{font-size:22px;padding:9px 18px}
.tabs{display:flex;gap:2px;padding:0 12px;border-top:1px solid var(--line);overflow-x:auto}
.tab{padding:10px 14px;color:var(--muted);font-weight:500;font-size:13.5px;border-bottom:2px solid transparent;white-space:nowrap}
.tab:hover{color:var(--ink)}
.tab.on{color:var(--ink);border-bottom-color:var(--band,var(--accent))}
.tab-n{font-size:11px;color:var(--faint);margin-left:3px}

/* ---------- Contenu d'une classe ---------- */
.course-body{display:flex;flex-direction:column;gap:14px}
.card{background:var(--surf);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.card-title{font-size:14px;font-weight:600;margin:0 0 12px}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;flex-wrap:wrap}
.card-head .card-title{margin:0}
.composer .fld-label{color:var(--muted)}
.composer-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:10px;flex-wrap:wrap}
.file-label input[type=file]{display:none}
.file-label{cursor:pointer}

.post-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.post-who{display:flex;flex-direction:column;line-height:1.3;min-width:0}
.post-tools{margin-left:auto;display:flex;align-items:center;gap:6px;flex:none}
.post-body{white-space:pre-wrap;color:var(--ink-dim);margin:6px 0 2px}
.a-title{font-size:18px;font-weight:700;margin:0;letter-spacing:-.01em}

.attach-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;align-items:center}
.attach-row + form,.grade-box + form,.post-body + form{margin-top:16px}
.attach{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:7px;padding:6px 11px;font-size:12.5px;color:var(--ink-dim);background:var(--surf2)}
.attach:hover{border-color:var(--accent);color:var(--ink)}
.attach-ic{color:var(--accent);font-size:12px}

.comments{border-top:1px solid var(--line);margin-top:12px;padding-top:10px;display:flex;flex-direction:column;gap:8px}
.comment{display:flex;gap:9px;font-size:13px;align-items:flex-start}
.comment-main{min-width:0;flex:1}
.comment-body{white-space:pre-wrap;color:var(--ink-dim)}
.comment-form{display:flex;gap:8px}
.comment-form input{flex:1;font-size:13px;padding:6px 10px}

/* Pièces jointes choisies (avant envoi) + zone de dépôt */
.file-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.file-chips:empty{display:none;margin:0}
.file-chip{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--accent);border-radius:7px;padding:5px 10px;font-size:12.5px;background:var(--accent-dim);color:var(--ink)}
.file-chip b{font-weight:500;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-chip i{font-style:normal;color:var(--muted);font-size:11px;font-family:var(--mono)}
.file-chip button{background:none;border:0;color:var(--late);font-size:13px;padding:0 2px;line-height:1}
.drop-on{outline:2px dashed var(--accent);outline-offset:3px}

/* ---------- Travaux ---------- */
.work-row{display:flex;align-items:center;gap:13px;color:var(--ink)}
.work-row:hover{border-color:var(--accent);color:var(--ink)}
.work-ic{width:32px;height:32px;border:1px solid var(--line);border-radius:7px;display:inline-grid;place-items:center;color:var(--accent);flex:none}
.work-ic.big{width:36px;height:36px;font-size:16px}
.work-main{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.work-state{margin-left:auto;flex:none}
.due{font-size:13px;color:var(--ink-dim);border-left:2px solid var(--accent);padding-left:10px;margin:10px 0 4px}
.due.late{border-left-color:var(--late);color:var(--late)}
.ok-text{color:var(--ok)}
.late-text{color:var(--late)}

.grade-box{border:1px solid var(--line);border-radius:var(--r);background:var(--surf2);padding:12px 14px;margin-top:12px;display:flex;flex-direction:column;gap:6px}
.grade-big{font-size:22px;font-weight:600;color:var(--accent)}
.sub-row{border-top:1px solid var(--line);padding:12px 0}
.sub-row:first-of-type{border-top:0}
.sub-who{display:flex;align-items:center;gap:9px}
.sub-who > div{display:flex;flex-direction:column;line-height:1.3}
.sub-body{margin:8px 0 0;font-size:13px}
.grade-form{display:flex;align-items:flex-end;gap:10px;margin-top:10px;flex-wrap:wrap}

/* ---------- Carnet de notes ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:var(--surf)}
.grades{border-collapse:collapse;width:100%;font-size:13px;min-width:420px}
.grades th,.grades td{padding:8px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle;white-space:nowrap}
.grades th{font-weight:600;font-size:12.5px;color:var(--ink-dim);background:var(--surf2)}
.grades th a{color:var(--ink)}
.grades th .tiny{display:block;font-weight:400}
.grades tbody tr:last-child td{border-bottom:0}
.grades tfoot td{border-top:1px solid var(--line2);border-bottom:0;background:var(--surf2)}
.grades .num{text-align:right}
.grades .sticky{position:sticky;left:0;background:var(--surf);z-index:1;box-shadow:1px 0 0 var(--line)}
.grades thead .sticky{background:var(--surf2)}
.grades tfoot .sticky{background:var(--surf2)}

/* ---------- Personnes ---------- */
.person-row{display:flex;align-items:center;gap:11px;padding:9px 0;border-top:1px solid var(--line)}
.person-row:first-of-type{border-top:0}
.card-title + .person-row{border-top:0}

/* ---------- Paramètres ---------- */
.code-line{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.color-row{display:flex;gap:10px}
.color-opt{cursor:pointer}
.color-opt input{display:none}
.color-dot{display:block;width:26px;height:26px;border-radius:50%;background:var(--band);border:2px solid transparent;opacity:.55;transition:all .12s}
.color-opt input:checked + .color-dot{opacity:1;border-color:var(--ink);transform:scale(1.12)}
.danger-zone{border-color:var(--err-line)}
.dz-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0;border-top:1px solid var(--line);flex-wrap:wrap}
.dz-row:first-of-type,.card-title + .dz-row{border-top:0}
.dz-row p{margin:2px 0 0;max-width:48ch}
.dz-confirm{display:flex;gap:8px;align-items:center}
.dz-confirm input{width:180px;font-size:13px}

/* ====================================================================
   ACCUEIL (landing)
   ==================================================================== */
/* Thème de fond : le ciel étoilé de la suite Aube (galaxie d'AubeInter).
   L'accueil et la connexion vivent toujours sous la nuit étoilée, quel que
   soit le thème choisi : on rescope les variables sur l'encre de nuit. */
.wel,.login-body{
  --bg:#141a26; --bg2:#111621;
  --surf:#1a2131; --surf2:#20293b; --surf3:#283246;
  --line:#2c3648; --line2:#3d4a61;
  --ink:#f1efe8; --ink-dim:#c9cdd9; --muted:#8d95a8; --faint:#6c7488;
  --accent:#5b8ae8; --accent-h:#7ba4f2; --accent-dim:rgba(91,138,232,.18);
  --c-bleu:#6c9bee; --c-vert:#5cbb84; --c-terre:#e79a5c;
  --c-violet:#a684f0; --c-cyan:#4fb8cd; --c-rouge:#e07060;
  --star:rgba(255,255,255,.42);
}
/* Le ciel de l'aube, dessiné en dégradés : nuit bleue en haut, lueur chaude
   sur l'horizon. Les étoiles vivent dans un calque fixe (::before) pour ne pas
   multiplier les couches de fond. */
.wel,.login-body{
  background-color:#0c1220;
  background-image:
    radial-gradient(1000px 520px at 82% -6%,rgba(104,140,225,.26),transparent 62%),
    radial-gradient(1100px 560px at 12% 104%,rgba(255,168,104,.22),transparent 60%),
    radial-gradient(700px 340px at 50% 118%,rgba(255,214,150,.16),transparent 62%),
    linear-gradient(172deg,#080d18 0%,#0e1526 42%,#161f33 74%,#232840 100%);
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  background-attachment:fixed;
}
.wel::before,.login-body::before{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 14%,rgba(255,255,255,.85),transparent),
    radial-gradient(1.2px 1.2px at 27% 33%,rgba(255,255,255,.55),transparent),
    radial-gradient(1.7px 1.7px at 41% 9%,rgba(255,255,255,.75),transparent),
    radial-gradient(1.1px 1.1px at 58% 26%,rgba(255,255,255,.5),transparent),
    radial-gradient(1.9px 1.9px at 71% 12%,rgba(255,244,225,.8),transparent),
    radial-gradient(1.2px 1.2px at 86% 31%,rgba(255,255,255,.6),transparent),
    radial-gradient(1.4px 1.4px at 94% 8%,rgba(255,255,255,.5),transparent),
    radial-gradient(1.3px 1.3px at 19% 52%,rgba(255,255,255,.45),transparent),
    radial-gradient(1.6px 1.6px at 63% 47%,rgba(255,255,255,.5),transparent),
    radial-gradient(1.1px 1.1px at 78% 61%,rgba(255,255,255,.35),transparent),
    radial-gradient(1.4px 1.4px at 34% 71%,rgba(255,255,255,.3),transparent);
}
.wel > *,.login-body > *{position:relative;z-index:1}
.wel-nav{display:flex;align-items:center;justify-content:space-between;padding:16px clamp(18px,5vw,54px);border-bottom:1px solid var(--line)}
.wel-nav-links{display:flex;align-items:center;gap:20px;font-size:13.5px}
.wel-nav-links > a{color:var(--ink-dim);font-weight:500}
.wel-nav-links > a:hover{color:var(--ink)}

.wel-hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:center;padding:clamp(40px,8vh,88px) clamp(18px,5vw,54px);max-width:1180px;margin:0 auto}
.wel-h1{font-size:clamp(32px,4.6vw,52px);font-weight:700;letter-spacing:-.03em;line-height:1.06;margin:6px 0 18px}
.wel-lead{color:var(--ink-dim);font-size:15.5px;max-width:54ch;margin:0 0 26px}
.wel-cta{display:flex;gap:12px;flex-wrap:wrap}
.wel-cta.center{justify-content:center;margin-top:36px}
.wel-note{margin-top:18px;font-size:11.5px;color:var(--muted);letter-spacing:.05em}

.wel-mock{display:flex;flex-direction:column;gap:12px}
.mock-card{position:relative;display:flex;flex-direction:column;gap:3px;background:var(--surf);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 13px;overflow:hidden}
.mock-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--band)}
.mock-name{font-weight:600;font-size:14.5px;margin-top:3px}
.mock-meta{color:var(--muted);font-size:12px}
.mock-code{color:var(--band);font-size:12px;letter-spacing:.12em;margin-top:7px}
.mock-line{color:var(--ink-dim);font-size:12px;margin-top:7px;border-top:1px solid var(--line);padding-top:7px}

.wel-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.strip-step{background:var(--bg2);padding:26px clamp(18px,3vw,36px);display:flex;gap:14px;font-size:13.5px;color:var(--ink-dim)}
.strip-step b{color:var(--ink)}
.step-n{color:var(--muted);font-size:13px;font-weight:600}

.wel-section{max-width:1180px;margin:0 auto;padding:clamp(44px,8vh,80px) clamp(18px,5vw,54px)}
.wel-h2{font-size:clamp(24px,3vw,34px);font-weight:700;letter-spacing:-.02em;margin:4px 0 30px}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.feature{background:var(--surf);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.feature h3{margin:10px 0 8px;font-size:15.5px}
.feature p{margin:0;color:var(--ink-dim);font-size:13.5px}
.feat-n{color:var(--muted);font-size:12px;font-weight:600}

.wel-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:22px clamp(18px,5vw,54px);border-top:1px solid var(--line);color:var(--muted);font-size:13px;flex-wrap:wrap}
.wel-foot > div{display:flex;align-items:center;gap:10px}
.dot{color:var(--faint);margin:0 5px}

/* ====================================================================
   CONNEXION
   ==================================================================== */
.login-body{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);min-height:100vh}
.login-card{max-width:460px;width:100%;justify-self:end;padding:64px 56px;display:flex;flex-direction:column}
.login-head{display:flex;align-items:center;gap:13px;margin-bottom:48px}
.login-monogram{position:relative;width:40px;height:40px;border-radius:9px;background:var(--surf2);border:1px solid var(--line);display:grid;place-items:center;font-weight:700;font-size:20px;color:var(--ink)}
.login-head-text{display:flex;flex-direction:column;line-height:1.25}
.login-head-text strong{font-size:15px}
.login-head-text span{font-size:12px;color:var(--muted)}
.login-title{font-size:40px;font-weight:700;letter-spacing:-.03em;line-height:1.05;margin:6px 0 18px}
.login-intro{color:var(--ink-dim);max-width:38ch;margin:0 0 28px}
.login-form{display:flex;flex-direction:column;gap:14px;margin-bottom:30px}
.field{position:relative;display:block}
.field-label{position:absolute;top:9px;left:14px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.field-num{position:absolute;top:9px;right:14px;font-size:10px;color:var(--faint)}
.field input{width:100%;padding:28px 14px 11px;font-size:15px;border-radius:9px}
/* Pas de position sur .pw-wrap : l'étiquette absolue du champ resterait
   sous le fond du <input>. L'œil se cale sur .field, déjà positionné. */
.pw-wrap{display:block}
.pw-wrap input{padding-right:46px}
.pw-eye{position:absolute;right:8px;top:50%;transform:translateY(-50%);display:inline-grid;place-items:center;width:30px;height:30px;background:none;border:0;border-radius:6px;color:var(--muted);cursor:pointer}
.pw-eye:hover{color:var(--ink)}
.login-submit{justify-content:center;padding:13px;font-size:14px}
.login-create{margin:-14px 0 26px;font-size:13px;color:var(--muted)}
.login-foot{margin-top:auto;display:flex;justify-content:space-between;align-items:center;padding-top:30px;font-size:12px;color:var(--muted);border-top:1px solid var(--line)}
.login-aside{position:relative;border-left:1px solid var(--line);display:flex;flex-direction:column;justify-content:center;padding:0 8%;overflow:hidden}
.login-aside::before{content:"";position:absolute;inset:0;background-image:radial-gradient(1.3px 1.3px at 20% 30%,var(--star),transparent),radial-gradient(1.3px 1.3px at 70% 60%,var(--star),transparent),radial-gradient(1.3px 1.3px at 45% 80%,var(--star),transparent),radial-gradient(1.3px 1.3px at 85% 20%,var(--star),transparent);opacity:.65}
.aside-stack{position:relative;display:flex;flex-direction:column;gap:12px;max-width:340px}
.aside-note{position:relative;font-size:17px;color:var(--ink-dim);margin-top:38px;max-width:28ch}


/* ====================================================================
   PRÉFÉRENCES D'AFFICHAGE
   Cinq fonds, six accents, deux densités : tout passe par des variables
   posées sur <html> par le serveur (data-fond, data-accent, data-densite,
   data-anim). Les mêmes déclarations servent aux vignettes d'aperçu de la
   page Préférences, qui portent [data-apercu] au lieu de data-fond.
   ==================================================================== */

:root{--fond:none;--fond-size:auto;--fond-repeat:no-repeat;
      --veil:rgba(246,247,249,.93);--grid-c:rgba(45,92,200,.07)}
:root[data-theme="dark"]{--veil:rgba(10,11,13,.86);--grid-c:rgba(150,180,240,.09)}

/* Aurore — le lever du jour : chaud à gauche, bleu nuit à droite. */
:root[data-fond="aurore"],[data-apercu="aurore"]{
  --fond:radial-gradient(68% 52% at 6% -12%,rgba(255,201,138,.55),transparent 62%),
         radial-gradient(62% 48% at 95% -8%,rgba(150,185,255,.45),transparent 60%),
         radial-gradient(58% 46% at 50% 112%,rgba(45,92,200,.10),transparent 62%);
  --fond-size:cover;
}
:root[data-theme="dark"][data-fond="aurore"],:root[data-theme="dark"] [data-apercu="aurore"]{
  --fond:radial-gradient(68% 52% at 6% -12%,rgba(91,138,232,.32),transparent 62%),
         radial-gradient(62% 48% at 95% -8%,rgba(166,132,240,.26),transparent 60%),
         radial-gradient(58% 46% at 50% 112%,rgba(92,187,132,.16),transparent 62%);
}

/* Nuit étoilée — la photo de la suite Aube, sous un voile qui garde le texte lisible. */
:root[data-fond="etoiles"],[data-apercu="etoiles"]{
  --fond:linear-gradient(var(--veil),var(--veil)),url(fond-etoiles.jpg);
  --fond-size:cover;
}

/* Papier — grain fin et teintes chaudes, pour les longues séances de correction. */
:root[data-fond="papier"],[data-apercu="papier"]{
  --fond:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23g)' opacity='.05'/%3E%3C/svg%3E");
  --fond-size:180px 180px; --fond-repeat:repeat;
}
:root:not([data-theme="dark"])[data-fond="papier"]{
  --bg:#f7f4ec; --bg2:#fffdf7; --surf:#fffdf7; --surf2:#f3efe4; --surf3:#e8e2d3;
  --line:#e4dece; --line2:#cdc4b1;
}
:root[data-theme="dark"][data-fond="papier"]{
  --bg:#181613; --bg2:#131110; --surf:#221f1a; --surf2:#2a261f; --surf3:#332e25;
  --line:#332e26; --line2:#463f34;
}

/* Grille — quadrillage d'ingénieur, 34 px. */
:root[data-fond="grille"],[data-apercu="grille"]{
  --fond:linear-gradient(var(--grid-c) 1px,transparent 1px),
         linear-gradient(90deg,var(--grid-c) 1px,transparent 1px);
  --fond-size:34px 34px; --fond-repeat:repeat;
}

:root[data-fond="uni"],[data-apercu="uni"]{--fond:none}

/* Les vignettes de la page Préférences sont petites : on y force la teinte du
   papier et on allège le voile des étoiles, sinon elles paraissent vides. */
[data-apercu="papier"]{--bg:#f7f4ec}
:root[data-theme="dark"] [data-apercu="papier"]{--bg:#181613}
[data-apercu="etoiles"]{--veil:rgba(246,247,249,.62)}
:root[data-theme="dark"] [data-apercu="etoiles"]{--veil:rgba(10,11,13,.55)}

/* ---------- Couleur d'accent ---------- */
:root[data-accent="vert"]{--accent:#2d6a4f}
:root[data-accent="terre"]{--accent:#b4552d}
:root[data-accent="violet"]{--accent:#7248bb}
:root[data-accent="cyan"]{--accent:#1b7f95}
:root[data-accent="rouge"]{--accent:#bf4630}
:root[data-theme="dark"][data-accent="vert"]{--accent:#5cbb84}
:root[data-theme="dark"][data-accent="terre"]{--accent:#e79a5c}
:root[data-theme="dark"][data-accent="violet"]{--accent:#a684f0}
:root[data-theme="dark"][data-accent="cyan"]{--accent:#4fb8cd}
:root[data-theme="dark"][data-accent="rouge"]{--accent:#e07060}
/* Le bleu garde ses valeurs réglées à la main ; les autres se dérivent. */
:root[data-accent]:not([data-accent="bleu"]){
  --accent-h:color-mix(in srgb,var(--accent) 82%,#000);
  --accent-dim:color-mix(in srgb,var(--accent) 13%,transparent);
  --star:color-mix(in srgb,var(--accent) 34%,transparent);
}
:root[data-theme="dark"][data-accent]:not([data-accent="bleu"]){
  --accent-h:color-mix(in srgb,var(--accent) 76%,#fff);
}

/* ---------- Densité ---------- */
:root[data-densite="compact"] body{font-size:13px}
:root[data-densite="compact"] .topbar{height:46px;padding:0 14px}
:root[data-densite="compact"] .shell{padding:18px 16px 56px}
:root[data-densite="compact"] .page-head{margin-bottom:16px}
:root[data-densite="compact"] .page-title{font-size:22px}
:root[data-densite="compact"] .card{padding:12px 14px}
:root[data-densite="compact"] .course-body{gap:10px}
:root[data-densite="compact"] .course-grid{gap:10px}
:root[data-densite="compact"] .course-card{padding:12px 13px 11px}
:root[data-densite="compact"] .ch-main{padding:13px 16px 9px}
:root[data-densite="compact"] .ch-name{font-size:20px}
:root[data-densite="compact"] .tab{padding:8px 12px}
:root[data-densite="compact"] .section-title{margin:24px 0 10px}

/* ---------- Animations coupées ---------- */
:root[data-anim="off"] *,:root[data-anim="off"] *::before,:root[data-anim="off"] *::after{
  animation-duration:.001ms!important;animation-iteration-count:1!important;
  transition-duration:.001ms!important;scroll-behavior:auto!important}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
}

/* ---------- Motifs du bandeau d'une classe ---------- */
[data-motif="uni"]{--motif:none}
[data-motif="degrade"]{--motif:linear-gradient(115deg,color-mix(in srgb,var(--band) 17%,transparent),transparent 62%)}
[data-motif="rayures"]{--motif:repeating-linear-gradient(135deg,color-mix(in srgb,var(--band) 10%,transparent) 0 9px,transparent 9px 21px)}
[data-motif="points"]{--motif:radial-gradient(color-mix(in srgb,var(--band) 30%,transparent) 1.5px,transparent 1.6px);--motif-size:16px 16px}
[data-motif="vagues"]{--motif:repeating-radial-gradient(circle at 50% 118%,transparent 0 13px,color-mix(in srgb,var(--band) 13%,transparent) 13px 14px)}

/* ---------- Page Préférences et réglages de classe ---------- */
.pref-lead{color:var(--muted);max-width:62ch;margin:0 0 4px}
.card-lead{color:var(--muted);max-width:62ch;margin:0 0 14px}
.opt-row{display:grid;grid-template-columns:repeat(auto-fill,minmax(158px,1fr));gap:10px}
.opt-row.slim{grid-template-columns:repeat(auto-fill,minmax(132px,1fr))}
.opt{position:relative;display:flex;flex-direction:column;gap:6px;border:1px solid var(--line);border-radius:9px;padding:10px;cursor:pointer;background:var(--surf2);transition:border-color .12s,box-shadow .12s}
.opt:hover{border-color:var(--line2)}
.opt:has(input:checked){border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-dim)}
.opt input{position:absolute;opacity:0;width:0;height:0;pointer-events:none}
.opt-name{font-weight:600;font-size:13px;color:var(--ink)}
.opt-desc{color:var(--muted);font-size:11.5px;line-height:1.4}
.opt-prev{height:54px;border-radius:6px;border:1px solid var(--line);
  background-color:var(--bg);background-image:var(--fond,none);
  background-size:var(--fond-size,cover);background-repeat:var(--fond-repeat,no-repeat);
  background-position:center}
.opt-prev.motif{background-color:var(--surf);background-image:var(--motif,none);
  background-size:var(--motif-size,auto);background-repeat:repeat;height:40px}
.opt-prev.accent{background:var(--band);height:34px;border-color:transparent}
.opt-prev.dense{display:flex;flex-direction:column;gap:4px;padding:8px;justify-content:center;background:var(--surf)}
.opt-prev.dense i{display:block;height:4px;border-radius:2px;background:var(--line2)}
.opt-prev.dense.serre{gap:2px}

.sw-row{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-top:1px solid var(--line)}
.sw-row:first-of-type,.card-title + .sw-row{border-top:0}
.sw-row input{flex:none;margin-top:2px}
.sw-text{display:flex;flex-direction:column;gap:2px}
.sw-text b{font-size:13.5px}
.sw-text span{color:var(--muted);font-size:12px;max-width:60ch}
.pref-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.version-line{margin:18px 0 0;text-align:right}

/* ---------- Adaptatif ---------- */
@media (max-width: 900px){
  .wel,.login-body{background-attachment:scroll}
  .opt-row{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
  .wel-hero{grid-template-columns:1fr}
  .wel-mock{max-width:420px}
  .wel-strip{grid-template-columns:1fr}
  .login-body{grid-template-columns:1fr}
  .login-aside{display:none}
  .login-card{justify-self:stretch;max-width:none;padding:44px 24px}
}
@media (max-width: 620px){
  .brand-name,.user-name{display:none}
  .topbar{gap:10px;padding:0 12px}
  .topbar-right{gap:6px}
  .fld-row{grid-template-columns:1fr}
  .ch-main{flex-direction:column}
  .ch-code{align-items:flex-start}
  .wel-nav-links > a[href^="#"]{display:none}
  .dz-row{flex-direction:column;align-items:flex-start}
}

/* Aperçus de thème de la page Préférences. */
.opt-prev.theme-clair{background:linear-gradient(158deg,#ffffff 0 52%,#eef1f5 52%)}
.opt-prev.theme-sombre{background:linear-gradient(158deg,#151618 0 52%,#0e0f11 52%)}
.opt-prev.theme-systeme{background:linear-gradient(100deg,#ffffff 0 50%,#0e0f11 50%)}