:root{
  --bg:#EEF2F6;--surface:#FFFFFF;--surface-2:#F5F7FA;--ink:#0F1B2D;--ink-2:#58687C;--line:#DDE4EC;
  --brand:#0F3557;--brand-2:#1B5689;--on-brand:#FFFFFF;--accent:#E8A33D;--ok:#1F8A5B;--bad:#C43D3D;--info:#2F6FDE;
  --shadow:0 1px 2px rgba(15,27,45,.05),0 6px 20px rgba(15,27,45,.06);
  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"]){
  --bg:#0C1218;--surface:#141D27;--surface-2:#1A2531;--ink:#E7EDF4;--ink-2:#9AA9BA;--line:#26333F;
  --brand:#0F2A44;--brand-2:#1E4A73;--on-brand:#EAF2FB;--accent:#F0B657;--ok:#5CC995;--bad:#F07A7A;--info:#7FA9F0;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);color-scheme:dark;}}
:root[data-theme="dark"]{
  --bg:#0C1218;--surface:#141D27;--surface-2:#1A2531;--ink:#E7EDF4;--ink-2:#9AA9BA;--line:#26333F;
  --brand:#0F2A44;--brand-2:#1E4A73;--on-brand:#EAF2FB;--accent:#F0B657;--ok:#5CC995;--bad:#F07A7A;--info:#7FA9F0;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);color-scheme:dark;}
html{height:100%;scroll-padding-top:calc(env(safe-area-inset-top,0px) + 70px)}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;min-height:100%;background:var(--bg);color:var(--ink);font:500 16px/1.6 "Manrope",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:30;background:var(--brand)}
.app{display:flex;min-height:100%}
.content{flex:1;min-width:0}
main{max-width:1060px;margin:0 auto;padding:22px 18px 150px}

/* navigation */
.side{display:none}
.mtop{position:sticky;top:env(safe-area-inset-top,0px);z-index:12;background:var(--brand);color:var(--on-brand)}
.mtop-in{display:flex;align-items:center;gap:10px;min-height:56px;padding:0 16px}
.logo{display:flex;align-items:center;gap:10px;background:none;border:0;color:inherit;font:inherit;cursor:pointer;padding:0;text-align:left}
.logo b{display:block;font-weight:800;font-size:1.02rem;line-height:1.15}
.logo small{display:block;font-size:.72rem;opacity:.72}
.bottom{position:fixed;left:0;right:0;bottom:0;z-index:15;background:var(--surface);border-top:1px solid var(--line);display:flex;padding-bottom:env(safe-area-inset-bottom,0px)}
.bottom button{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;font:inherit;font-size:.68rem;font-weight:700;color:var(--ink-2);background:none;border:0;padding:9px 0 8px;cursor:pointer}
.bottom button[aria-current="page"]{color:var(--brand-2)}
.bottom button[aria-current="page"] svg{stroke:var(--brand-2)}
.ico{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;flex:none}
@media (min-width:900px){
  .side{display:flex;flex-direction:column;gap:4px;position:sticky;top:env(safe-area-inset-top,0px);height:calc(100vh - env(safe-area-inset-top,0px));width:248px;flex:none;background:var(--brand);color:var(--on-brand);padding:22px 14px}
  .side .logo{padding:0 8px 22px}
  .side nav{display:grid;gap:4px}
  .side nav button{display:flex;align-items:center;gap:12px;font:inherit;font-weight:700;font-size:.95rem;color:var(--on-brand);opacity:.76;background:none;border:0;border-radius:10px;padding:11px 12px;cursor:pointer;text-align:left}
  .side nav button:hover{opacity:1;background:rgba(255,255,255,.06)}
  .side nav button[aria-current="page"]{opacity:1;background:rgba(255,255,255,.13)}
  .side .sidefoot{margin-top:auto;font-size:.78rem;opacity:.65;padding:0 8px}
  .mtop,.bottom{display:none}
  main{padding:32px 32px 120px}
}

/* typographie & blocs */
.mono{font-family:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace}
h1{font-size:1.7rem;line-height:1.2;margin:0;font-weight:800;letter-spacing:-.02em}
h2{font-size:1.12rem;line-height:1.3;margin:30px 0 12px;font-weight:800}
.muted{color:var(--ink-2)}
.pagehead{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:18px}
.pagehead p{margin:4px 0 0}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.card>h2:first-child,.card>h3:first-child{margin-top:0}
.cols{display:grid;gap:16px}
@media (min-width:900px){.cols{grid-template-columns:1.35fr 1fr;align-items:start}}
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:var(--on-brand);border-radius:20px;padding:24px}
.hero::after{content:"";position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(232,163,61,.35),transparent 70%)}
.hero .date{font-size:.88rem;opacity:.8;font-weight:600;text-transform:capitalize}
.hero h1{font-size:1.65rem;margin-top:2px}
.hero p{margin:8px 0 0;opacity:.9;max-width:56ch}
.next{position:relative;z-index:1;margin-top:18px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:14px 16px;display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.next .lbl{font-size:.78rem;opacity:.75;font-weight:700}
.next .what{font-weight:800;font-size:1.05rem;line-height:1.3}
.next .btn{margin-left:auto}
.kpis{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:16px}
@media (min-width:640px){.kpis{grid-template-columns:repeat(4,1fr)}}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px;box-shadow:var(--shadow)}
.kpi b{display:block;font-size:1.55rem;font-weight:800;line-height:1.15}
.kpi span{font-size:.8rem;color:var(--ink-2);font-weight:600}
.timeline{display:grid;gap:8px}
.ev{display:flex;gap:12px;align-items:stretch;background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:10px 12px;font:inherit;color:inherit;text-align:left;width:100%}
button.ev{cursor:pointer}
.ev .bar{width:4px;border-radius:4px;background:var(--c,var(--ink-2));flex:none}
.ev .t{font-size:.8rem;font-weight:800;color:var(--ink-2);min-width:94px;padding-top:2px}
.ev .n{font-weight:700;line-height:1.35}
.ev .s{display:block;font-size:.8rem;color:var(--ink-2);font-weight:600}
.ev.work{--c:#7A8899}
.ev.study{--c:var(--accent);background:color-mix(in srgb,var(--accent) 9%,var(--surface))}
.ev.done{opacity:.55}
.ev.done .n{text-decoration:line-through}
.chk{width:22px;height:22px;flex:none;align-self:center;border-radius:7px;border:2px solid var(--accent);background:none;cursor:pointer;display:grid;place-items:center;padding:0}
.chk.on{background:var(--accent)}
.chk.on::after{content:"";width:6px;height:11px;border:solid #1d1404;border-width:0 2.5px 2.5px 0;transform:rotate(45deg) translate(-1px,-1px)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.tile{position:relative;display:flex;flex-direction:column;gap:6px;text-align:left;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 16px 14px 20px;cursor:pointer;box-shadow:var(--shadow);overflow:hidden;transition:transform .15s,border-color .15s}
.tile::before{content:"";position:absolute;inset:0 auto 0 0;width:5px;background:var(--c)}
.tile:hover{transform:translateY(-2px);border-color:var(--c)}
.code{display:inline-block;font-family:"JetBrains Mono",ui-monospace,monospace;font-weight:700;font-size:.78rem;color:var(--c);background:color-mix(in srgb,var(--c) 13%,transparent);border-radius:6px;padding:2px 8px;align-self:flex-start}
.tile .n{font-weight:800;font-size:1.04rem;line-height:1.3}
.tile .p{font-size:.85rem;color:var(--ink-2)}
.progress{height:6px;border-radius:6px;background:var(--line);overflow:hidden;margin-top:8px}
.progress i{display:block;height:100%;background:var(--c,var(--brand-2));border-radius:6px}
.tile .foot{display:flex;justify-content:space-between;font-size:.8rem;color:var(--ink-2);margin-top:4px}
.avg{font-weight:800;color:var(--ink)}
.avg.lo{color:var(--bad)}.avg.hi{color:var(--ok)}
.tag{display:inline-block;font-size:.72rem;font-weight:800;border-radius:999px;padding:2px 9px;background:color-mix(in srgb,var(--accent) 20%,transparent);color:color-mix(in srgb,var(--accent) 50%,var(--ink))}
.chead{border-radius:20px;padding:22px;background:linear-gradient(135deg,color-mix(in srgb,var(--c) 78%,#000),var(--c));color:#fff}
.chead .code{color:#fff;background:rgba(255,255,255,.2)}
.chead h1{margin-top:10px}
.chead .info{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:10px;font-size:.88rem;opacity:.92}
.back{display:inline-flex;align-items:center;gap:6px;background:none;border:0;color:var(--ink-2);font:inherit;font-weight:700;font-size:.9rem;padding:0;margin-bottom:14px;cursor:pointer}
.tabs{display:flex;gap:4px;overflow-x:auto;margin:16px 0 8px;padding:4px;background:var(--surface);border:1px solid var(--line);border-radius:12px}
.tabs button{flex:1 0 auto;font:inherit;font-weight:700;font-size:.9rem;background:none;border:0;border-radius:9px;color:var(--ink-2);padding:9px 12px;cursor:pointer;white-space:nowrap}
.tabs button[aria-selected="true"]{background:var(--brand);color:var(--on-brand)}
label{display:block;font-weight:700;font-size:.88rem;margin:12px 0 4px}
input:not([type]),input[type="text"],input[type="email"],input[type="password"],input[type="time"],input[type="number"],select,textarea{display:block;width:100%;margin-top:6px;font:inherit;font-weight:500;color:var(--ink);background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:10px 12px;min-height:44px}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand-2);outline-offset:1px}
input[type="file"]{font:inherit;font-size:.9rem;width:100%;margin-top:6px;color:var(--ink);padding:14px;border:1.5px dashed var(--line);border-radius:12px;background:var(--surface-2)}
textarea{resize:vertical}
.seg{display:flex;gap:6px;flex-wrap:wrap;margin-top:6px}
.seg label{margin:0;display:flex;align-items:center;gap:8px;font-weight:700;font-size:.9rem;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:9px 12px;cursor:pointer}
.seg input{accent-color:var(--brand-2)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:700;font-size:.92rem;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:10px 14px;cursor:pointer;min-height:42px}
.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--on-brand)}
.btn.accent{background:var(--accent);border-color:var(--accent);color:#1d1404}
.btn.ghost{border-color:transparent;background:transparent;color:var(--ink-2)}
.btn.danger{color:var(--bad)}
.btn.sm{min-height:34px;padding:6px 11px;font-size:.85rem}
.btn:disabled,.evt:disabled{opacity:.45;cursor:not-allowed}
.row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.items{display:grid;gap:10px;margin:12px 0}
.item{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:14px 16px}
.item .h{font-weight:800}
.item .s{font-size:.84rem;color:var(--ink-2)}
button.item{font:inherit;color:inherit;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%}
.suptext{white-space:pre-wrap;font-size:.86rem;background:var(--surface-2);padding:12px;border-radius:10px;max-height:320px;overflow:auto;margin-top:10px}
.evtypes{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:10px;margin-top:14px}
.evt{display:flex;flex-direction:column;gap:4px;text-align:left;font:inherit;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px;cursor:pointer;box-shadow:var(--shadow)}
.evt:hover:not(:disabled){border-color:var(--brand-2)}
.evt b{font-size:1rem}
.evt span{color:var(--ink-2);font-size:.85rem}
.evt i{font-style:normal;font-weight:800;font-size:.76rem;color:var(--accent)}
.empty{color:var(--ink-2);background:var(--surface);border:1px dashed var(--line);border-radius:14px;padding:16px;margin:12px 0}
.status{color:var(--ink-2);font-size:.9rem;min-height:1.3em;margin:10px 0 0}
.toc{display:flex;gap:6px;overflow-x:auto;margin:14px 0;padding-bottom:4px}
.toc a{flex:none;font-size:.82rem;font-weight:700;color:var(--ink);text-decoration:none;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 12px}
.lesson{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px 24px 28px;margin-top:12px;box-shadow:var(--shadow)}
.prose{max-width:72ch;font-weight:500;font-size:1.02rem;line-height:1.72}
.prose h2{font-size:1.28rem;margin:34px 0 10px;padding-top:16px;border-top:1px solid var(--line)}
.prose h2:first-child{margin-top:0;border-top:0;padding-top:0}
.prose h3{font-size:1.06rem;margin:22px 0 6px}
.prose strong{font-weight:800}
.prose pre{overflow-x:auto;background:var(--surface-2);border:1px solid var(--line);padding:14px 16px;border-radius:10px;font-size:.86rem;line-height:1.55}
.prose code{font-family:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;font-size:.88em}
.prose :not(pre)>code{background:var(--surface-2);border:1px solid var(--line);padding:1px 6px;border-radius:5px}
.prose table{display:block;overflow-x:auto;border-collapse:collapse;margin:14px 0;font-size:.94rem}
.prose th,.prose td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--surface-2)}
.prose blockquote{margin:16px 0;padding:12px 16px;border-left:4px solid var(--accent);background:color-mix(in srgb,var(--accent) 9%,transparent);border-radius:0 10px 10px 0}
.prose blockquote p{margin:4px 0}
.prose details{background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:10px 0}
.prose summary{cursor:pointer;font-weight:800;color:var(--brand-2)}
.q{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:18px;margin:14px 0;box-shadow:var(--shadow)}
.qh{display:flex;justify-content:space-between;gap:10px;font-weight:800;font-size:.85rem;color:var(--ink-2)}
.qh b{color:var(--bad);font-size:1rem}
.opt{display:flex;gap:10px;align-items:flex-start;padding:11px 12px;border:1px solid var(--line);border-radius:10px;margin:7px 0;cursor:pointer;font-weight:600;background:var(--surface-2)}
.opt input{margin-top:5px;accent-color:var(--brand-2)}
.opt.right{border-color:var(--ok);background:color-mix(in srgb,var(--ok) 13%,transparent)}
.opt.wrong{border-color:var(--bad);background:color-mix(in srgb,var(--bad) 11%,transparent)}
.fb{margin:12px 0 4px;padding:10px 14px;border-radius:10px;background:color-mix(in srgb,var(--bad) 9%,transparent);font-weight:600;border-left:4px solid var(--bad)}
details.x{margin-top:10px}
details.x summary{cursor:pointer;font-weight:800;color:var(--brand-2)}
.result{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:16px 0}
.ring{width:96px;height:96px;border-radius:50%;background:conic-gradient(var(--rc) calc(var(--p)*1%),var(--line) 0);display:grid;place-items:center;flex:none}
.ring div{width:76px;height:76px;border-radius:50%;background:var(--surface);display:grid;place-items:center;font-weight:800;font-size:1.25rem}
.timer{position:sticky;top:calc(env(safe-area-inset-top,0px) + 66px);z-index:5;display:inline-flex;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:999px;padding:6px 14px;font-weight:800;font-size:.9rem;margin:12px 0 0}
@media (min-width:900px){.timer{top:calc(env(safe-area-inset-top,0px) + 14px)}}
.timer.low{color:var(--bad);border-color:var(--bad)}
.msg{padding:12px 15px;border-radius:14px;margin:10px 0;max-width:92%}
.msg.me{margin-left:auto;background:var(--brand);color:var(--on-brand);white-space:pre-wrap;border-bottom-right-radius:4px}
.msg.ai{background:var(--surface);border:1px solid var(--line);border-bottom-left-radius:4px}
.msg.ai>*:first-child{margin-top:0}.msg.ai>*:last-child{margin-bottom:0}
.composer{display:flex;gap:8px;align-items:flex-end;margin-top:12px}
.composer textarea{margin:0}
.week{display:grid;gap:12px}
@media (min-width:900px){.week{grid-template-columns:repeat(2,1fr)}}
.day{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:14px 16px;box-shadow:var(--shadow)}
.day.now{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 35%,transparent)}
.day h3{margin:0 0 10px;font-size:1rem;display:flex;justify-content:space-between;align-items:center;gap:8px}
.day h3 small{font-weight:700;color:var(--ink-2);font-size:.8rem}
.workgrid{display:grid;gap:8px}
.wrow{display:grid;grid-template-columns:110px 1fr 1fr;gap:8px;align-items:center}
.wrow .dn{display:flex;align-items:center;gap:8px;font-weight:800;font-size:.9rem;margin:0}
.wrow input[type="time"]{margin:0}
.wrow input[type="time"]:disabled{opacity:.4}
.weeknav{display:flex;align-items:center;gap:8px}
.flash{min-height:230px;display:grid;place-items:center;text-align:center;font-size:1.15rem;font-weight:700;line-height:1.5;padding:28px}
.flash .r{font-weight:500;font-size:1.02rem;color:var(--ink-2);margin-top:14px;border-top:1px solid var(--line);padding-top:14px}
.bars{display:grid;gap:12px}
.bars .l{display:flex;justify-content:space-between;font-weight:700;font-size:.9rem;margin-bottom:4px}
.busy{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(74px + env(safe-area-inset-bottom,0px));z-index:20;background:var(--ink);color:var(--bg);border-radius:999px;padding:8px 8px 8px 16px;display:flex;align-items:center;gap:12px;font-weight:700;font-size:.88rem;box-shadow:0 10px 30px rgba(0,0,0,.25);max-width:calc(100% - 24px)}
@media (min-width:900px){.busy{bottom:24px;left:calc(50% + 124px)}}
.busy[hidden]{display:none}
.busy .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);animation:pulse 1.2s infinite;flex:none}
@keyframes pulse{50%{opacity:.25}}
.busy .btn{min-height:32px;padding:5px 12px;background:transparent;color:var(--bg);border-color:color-mix(in srgb,var(--bg) 40%,transparent)}
#toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(130px + env(safe-area-inset-bottom,0px));z-index:21;background:var(--ok);color:#fff;padding:10px 16px;border-radius:10px;opacity:0;pointer-events:none;transition:opacity .2s;font-weight:700;font-size:.9rem;max-width:90vw}
#toast.show{opacity:1}
.foot-note{font-size:.84rem;color:var(--ink-2);margin-top:28px}
@media (max-width:520px){h1{font-size:1.42rem}.hero h1{font-size:1.4rem}.lesson{padding:16px}.wrow{grid-template-columns:92px 1fr 1fr}.next .btn{margin-left:0;width:100%}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

.sw{display:flex;align-items:center;gap:10px;font-weight:700;font-size:.92rem;margin:18px 0 0}
.sw input{width:18px;height:18px;accent-color:var(--brand-2)}
.opts>label:not(.sw){margin:6px 0 0 28px;font-weight:600;font-size:.84rem;color:var(--ink-2)}
.mtop .gear{margin-left:auto;background:rgba(255,255,255,.12);border:0;border-radius:10px;color:var(--on-brand);width:40px;height:40px;display:grid;place-items:center;cursor:pointer}
.mtop .gear[aria-current="page"]{background:var(--accent);color:#1d1404}
.auth{min-height:100vh;display:grid;place-items:center;padding:24px}
.auth .card{width:100%;max-width:400px}