:root{
  --leaf:#2E6B57;--leaf-d:#1F4D3E;--leaf-l:#E3F0E8;
  --bg:#F3F6F2;--surface:#FFFFFF;--line:#DCE5DF;
  --ink:#1D2824;--muted:#5C6C65;
  --sun:#F2B33D;--sun-d:#C98A12;
  --again:#C8463D;--again-d:#9A2F28;
  --hard:#D9822B;--hard-d:#A85F17;
  --good:#3B8C5A;--good-d:#286643;
  --easy:#2F78AE;--easy-d:#1F5682;
  --r-lg:22px;--r:14px;--r-sm:10px;
  --shadow:0 1px 2px rgba(30,60,45,.06),0 8px 24px rgba(30,60,45,.08);
  --font:ui-rounded,"SF Pro Rounded","Nunito","Segoe UI",system-ui,-apple-system,Roboto,sans-serif;
  --tabs-h:64px;
  color-scheme:light;
}
:root[data-theme="dark"]{
  --leaf:#5FB892;--leaf-d:#3E8E6C;--leaf-l:#1D3029;
  --bg:#101614;--surface:#18211D;--line:#2A3731;
  --ink:#E6EEEA;--muted:#9AABA3;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
  color-scheme:dark;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --leaf:#5FB892;--leaf-d:#3E8E6C;--leaf-l:#1D3029;
    --bg:#101614;--surface:#18211D;--line:#2A3731;
    --ink:#E6EEEA;--muted:#9AABA3;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
    color-scheme:dark;
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.5 var(--font);
  padding-bottom:calc(var(--tabs-h) + env(safe-area-inset-bottom));min-height:100vh}
a{color:var(--leaf)}
button{font:inherit;color:inherit}
img{max-width:100%;height:auto}
:focus-visible{outline:3px solid var(--sun);outline-offset:2px;border-radius:6px}

/* barre du haut */
.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  padding:10px 16px;padding-top:calc(10px + env(safe-area-inset-top));
  background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(10px)}
.brand{font-weight:800;font-size:19px;text-decoration:none;color:var(--ink);letter-spacing:-.01em}
.horse{display:inline-block;transform:scaleX(-1)}
.streak{text-decoration:none;color:var(--ink);font-weight:700;background:var(--surface);
  padding:4px 12px;border-radius:99px;box-shadow:var(--shadow)}
.streak.off{filter:grayscale(1);opacity:.7}

main{max-width:680px;margin:0 auto;padding:8px 16px 32px;outline:none}
.loading{color:var(--muted);text-align:center;margin-top:30vh}

/* onglets */
.tabs{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;justify-content:space-around;
  height:calc(var(--tabs-h) + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);
  background:var(--surface);border-top:1px solid var(--line)}
.tabs a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  font-size:12px;font-weight:600;text-decoration:none;color:var(--muted)}
.tabs a span{font-size:21px;line-height:1;filter:grayscale(1);opacity:.7}
.tabs a.on{color:var(--leaf)}
.tabs a.on span{filter:none;opacity:1}
body.in-session .tabs,body.in-session .top{display:none}
body.in-session{padding-bottom:0}

/* typographie */
h1{font-size:28px;line-height:1.15;margin:12px 0 6px;letter-spacing:-.02em}
h2{font-size:20px;margin:28px 0 10px;letter-spacing:-.01em}
.sub{color:var(--muted);margin:0 0 16px}
.small{font-size:14px;color:var(--muted)}

/* boutons épais */
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;border:0;cursor:pointer;
  padding:14px 18px;border-radius:var(--r);font-weight:800;font-size:17px;text-decoration:none;
  background:var(--leaf);color:#fff;box-shadow:0 4px 0 var(--leaf-d);transition:transform .06s,box-shadow .06s;
  -webkit-tap-highlight-color:transparent}
.btn:active{transform:translateY(3px);box-shadow:0 1px 0 var(--leaf-d)}
.btn.ghost{background:var(--surface);color:var(--ink);box-shadow:0 3px 0 var(--line),inset 0 0 0 2px var(--line)}
.btn.ghost:active{box-shadow:0 0 0 var(--line),inset 0 0 0 2px var(--line)}
.btn.sun{background:var(--sun);color:#3A2A05;box-shadow:0 4px 0 var(--sun-d)}
.btn[disabled]{opacity:.5;pointer-events:none}
.btn .meta{font-weight:600;opacity:.85;font-size:14px}
.btn.big{flex-direction:column;gap:2px;padding:18px}
.row{display:flex;gap:10px}
.row>*{flex:1}
.stack{display:grid;gap:12px;margin:16px 0}

/* accueil */
.hero{background:var(--surface);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow);margin-top:8px}
.goal{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.ring{--p:0;width:64px;height:64px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:800;font-size:15px;
  background:radial-gradient(closest-side,var(--surface) 76%,transparent 78% 100%),
    conic-gradient(var(--sun) calc(var(--p)*1%),var(--line) 0)}
.goal b{font-size:20px;display:block;line-height:1.2}

/* listes */
.list{background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);overflow:hidden}
.item{display:flex;align-items:center;gap:12px;padding:12px 14px;text-decoration:none;color:var(--ink);
  border-bottom:1px solid var(--line);cursor:pointer;background:none;border-left:0;border-right:0;border-top:0;width:100%;text-align:left}
.item:last-child{border-bottom:0}
.item:active{background:var(--leaf-l)}
.item .thumb{width:48px;height:48px;border-radius:12px;object-fit:cover;flex:none;background:var(--leaf-l)}
.item .body{flex:1;min-width:0}
.item .title{font-weight:700;line-height:1.25}
.item .meta{font-size:13px;color:var(--muted)}
.item .chev{color:var(--muted);font-size:20px}
.bar{height:6px;border-radius:9px;background:var(--line);overflow:hidden;margin-top:6px;display:flex}
.bar i{display:block;height:100%;background:var(--leaf)}
.bar i+i{background:color-mix(in srgb,var(--leaf) 35%,transparent)}
.pill{display:inline-block;font-size:12px;font-weight:700;padding:2px 8px;border-radius:99px;background:var(--leaf-l);color:var(--leaf)}

.chips{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.chip{border:2px solid var(--line);background:var(--surface);border-radius:99px;padding:6px 14px;font-weight:700;font-size:14px;cursor:pointer}
.chip.on{border-color:var(--leaf);background:var(--leaf-l);color:var(--leaf)}

.cover{width:100%;aspect-ratio:16/7;object-fit:cover;border-radius:var(--r-lg);display:block;margin-top:8px;background:var(--leaf-l)}
.back{display:inline-flex;align-items:center;gap:4px;text-decoration:none;color:var(--muted);font-weight:700;font-size:15px;margin:4px 0}

/* session */
.sess{max-width:680px;margin:0 auto;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column;
  padding:calc(12px + env(safe-area-inset-top)) 16px calc(12px + env(safe-area-inset-bottom))}
.sess-top{display:flex;align-items:center;gap:12px}
.x{border:0;background:none;font-size:26px;line-height:1;color:var(--muted);cursor:pointer;padding:4px 6px}
.prog{flex:1;height:14px;background:var(--line);border-radius:99px;overflow:hidden}
.prog i{display:block;height:100%;background:var(--good);border-radius:99px;transition:width .3s ease;
  box-shadow:inset 0 -4px 0 rgba(0,0,0,.12)}
.combo{font-weight:800;color:var(--sun-d);min-width:44px;text-align:right}
.where{font-size:13px;color:var(--muted);margin:10px 2px 6px;display:flex;justify-content:space-between;gap:8px}
.card{flex:1;background:var(--surface);border-radius:var(--r-lg);box-shadow:var(--shadow);padding:22px 20px;
  overflow:auto;position:relative;touch-action:pan-y;cursor:pointer;-webkit-tap-highlight-color:transparent}
.card.dragging{transition:none}
.card.fly-l{transform:translateX(-120%) rotate(-8deg);opacity:0;transition:.25s}
.card.fly-r{transform:translateX(120%) rotate(8deg);opacity:0;transition:.25s}
.card .q{font-size:21px;font-weight:700;line-height:1.35}
.card.flipped .q{font-size:16px;color:var(--muted);font-weight:600;padding-bottom:12px;border-bottom:2px dashed var(--line)}
.card .a{margin-top:14px;font-size:17px}
.card .cimg{display:block;margin:14px auto 0;border-radius:var(--r-sm);max-height:46vh;cursor:zoom-in;background:#fff}
.tap-hint{position:absolute;left:0;right:0;bottom:14px;text-align:center;color:var(--muted);font-size:14px;font-weight:600;pointer-events:none}
.note{margin-top:16px;background:var(--leaf-l);border-radius:var(--r);padding:12px 14px;font-size:15px}
.note summary{font-weight:800;color:var(--leaf);cursor:pointer}
.imp{font-size:12px;font-weight:800;letter-spacing:.01em}
.report{background:none;border:0;color:var(--muted);font-size:13px;text-decoration:underline;cursor:pointer;margin-top:18px;padding:0}

.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}
.g{border:0;border-radius:var(--r);padding:10px 4px 8px;font-weight:800;font-size:15px;color:#fff;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;line-height:1.2;transition:transform .06s,box-shadow .06s}
.g small{font-weight:600;font-size:12px;opacity:.9}
.g:active{transform:translateY(3px)}
.g1{background:var(--again);box-shadow:0 4px 0 var(--again-d)}
.g2{background:var(--hard);box-shadow:0 4px 0 var(--hard-d)}
.g3{background:var(--good);box-shadow:0 4px 0 var(--good-d)}
.g4{background:var(--easy);box-shadow:0 4px 0 var(--easy-d)}
.g:active{box-shadow:0 1px 0 rgba(0,0,0,.25)}
.flipbtn{margin-top:12px}

/* fin de série */
.done{text-align:center;padding-top:6vh}
.done .big-emoji{font-size:76px;line-height:1;display:inline-block;animation:pop .6s cubic-bezier(.2,1.6,.4,1) both}
@keyframes pop{0%{transform:scale(.2) rotate(-20deg);opacity:0}100%{transform:none;opacity:1}}
.stats3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0}
.stat{background:var(--surface);border-radius:var(--r);padding:12px 6px;box-shadow:var(--shadow)}
.stat b{display:block;font-size:24px}
.stat span{font-size:13px;color:var(--muted)}

/* markdown */
.md p{margin:.5em 0}
.md ul,.md ol{margin:.4em 0;padding-left:1.3em}
.md li{margin:.15em 0}
.md h3,.md h4,.md h5{margin:.9em 0 .3em;font-size:1.05em}
.md table{border-collapse:collapse;width:100%;font-size:14px;margin:.6em 0;display:block;overflow-x:auto}
.md td,.md th{border:1px solid var(--line);padding:6px 8px;text-align:left;vertical-align:top}
.md img{border-radius:var(--r-sm);display:block;margin:10px auto;cursor:zoom-in;background:#fff}
.md strong{color:var(--leaf-d)}
:root[data-theme="dark"] .md strong{color:var(--leaf)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .md strong{color:var(--leaf)}}
.course{background:var(--surface);border-radius:var(--r-lg);padding:18px 20px;box-shadow:var(--shadow);line-height:1.6}

/* recherche */
.search{width:100%;font:inherit;font-size:18px;padding:14px 16px;border-radius:var(--r);border:2px solid var(--line);
  background:var(--surface);color:var(--ink)}
.search:focus{border-color:var(--leaf);outline:none}
mark{background:color-mix(in srgb,var(--sun) 45%,transparent);color:inherit;border-radius:3px}

/* progrès */
.days{display:flex;align-items:flex-end;gap:3px;height:90px;margin:10px 0 4px}
.days i{flex:1;background:var(--leaf);border-radius:3px 3px 0 0;min-height:2px;opacity:.9}
.days i.z{background:var(--line)}
.field{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;border-bottom:1px solid var(--line)}
.field:last-child{border-bottom:0}
.field select{font:inherit;padding:6px 10px;border-radius:10px;border:2px solid var(--line);background:var(--surface);color:var(--ink)}
textarea.code{width:100%;min-height:90px;font:13px/1.4 ui-monospace,monospace;border-radius:var(--r);border:2px solid var(--line);
  padding:10px;background:var(--surface);color:var(--ink);word-break:break-all}

.lightbox{position:fixed;inset:0;z-index:100;background:rgba(10,15,12,.92);display:flex;align-items:center;justify-content:center;padding:12px;cursor:zoom-out}
.lightbox[hidden]{display:none}
.lightbox img{max-width:100%;max-height:100%;background:#fff;border-radius:8px}
.toast{position:fixed;left:50%;bottom:calc(var(--tabs-h) + 18px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:99px;font-weight:700;font-size:15px;opacity:0;pointer-events:none;transition:.25s;z-index:120;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%)}
.empty{text-align:center;color:var(--muted);padding:30px 10px}

@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}
@media (min-width:760px){
  .card .q{font-size:23px}
}