/* Page des cours : même univers que le site (noir, cyan, violet, Space Grotesk). */
:root{--cy:#00ffff;--vi:#b48cff;--ok:#39ff14;--no:#ff5aa8;--tx:#f2f6f8;--mu:rgba(255,255,255,.66);--line:rgba(255,255,255,.12)}
*{box-sizing:border-box;margin:0;padding:0}
html,body{background:#000;color:var(--tx)}
body{font:16px/1.65 'Space Grotesk',system-ui,sans-serif;-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:radial-gradient(900px 520px at 8% -10%,rgba(0,255,255,.16),transparent 62%),
  radial-gradient(800px 560px at 100% 0%,rgba(131,56,236,.16),transparent 60%),
  linear-gradient(rgba(0,255,255,.06) 1px,transparent 1px) 0 0/44px 44px,
  linear-gradient(90deg,rgba(0,255,255,.06) 1px,transparent 1px) 0 0/44px 44px;
  -webkit-mask-image:linear-gradient(#000 35%,transparent 100%);mask-image:linear-gradient(#000 35%,transparent 100%)}
a{color:inherit}
button{font-family:inherit}

/* En-tête */
.c-top{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;gap:16px;padding:12px clamp(16px,4vw,48px);padding-top:calc(12px + env(safe-area-inset-top,0px));background:rgba(0,0,0,.72);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.c-brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;font-size:14px;letter-spacing:.02em;white-space:nowrap}
.c-mark{display:block;color:#fff}
.c-prog{flex:1;height:3px;border-radius:99px;background:rgba(255,255,255,.12);overflow:hidden}
.c-prog i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--cy),var(--vi));transition:width .5s cubic-bezier(.16,1,.3,1)}
.c-cnt{font-size:12px;color:var(--mu);letter-spacing:.08em;white-space:nowrap}
.c-menu-btn{font-size:12px;font-weight:500;letter-spacing:.04em;color:#fff;background:transparent;border:1px solid rgba(255,255,255,.25);border-radius:999px;padding:8px 16px;cursor:pointer;transition:border-color .3s,background .3s}
.c-menu-btn:hover{border-color:#fff;background:rgba(255,255,255,.06)}

/* Menu des défis */
.c-menu{display:none;position:fixed;z-index:60;top:calc(58px + env(safe-area-inset-top,0px));right:clamp(8px,3vw,40px);width:min(380px,calc(100vw - 16px));max-height:calc(100vh - 90px);overflow:auto;padding:10px;border-radius:18px;background:rgba(6,9,14,.96);border:1px solid var(--line);box-shadow:0 24px 60px -20px #000}
.c-menu.open{display:block}
.c-menu h5{margin:12px 10px 4px;font:600 11px 'Space Grotesk',sans-serif;letter-spacing:.18em;text-transform:uppercase;color:var(--cy)}
.c-menu button{display:flex;gap:10px;align-items:center;width:100%;text-align:left;padding:10px 12px;border:0;border-radius:10px;background:transparent;color:#fff;font-size:14px;cursor:pointer}
.c-menu button:hover:not(:disabled){background:rgba(0,255,255,.1)}
.c-menu button.cur{background:rgba(0,255,255,.14);color:var(--cy)}
.c-menu button:disabled{color:rgba(255,255,255,.32);cursor:not-allowed}
.c-menu .n{flex:none;width:22px;font-size:12px;color:var(--mu)}
.c-menu .st{margin-left:auto;font-size:13px}

/* Mise en page */
.c-main{position:relative;z-index:1;width:min(780px,calc(100% - 32px));margin:0 auto;padding:92px 0 140px}
.c-say{display:flex;align-items:center;gap:14px;margin:6px 0 26px}
.c-say-img{width:74px;height:auto;flex:none;filter:drop-shadow(0 6px 14px rgba(0,0,0,.6)) drop-shadow(0 0 14px rgba(0,255,255,.3));animation:c-float 3.4s ease-in-out infinite}
.c-say-col{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
.c-hint{font:500 12.5px 'Space Grotesk',sans-serif;color:var(--cy);background:transparent;border:1px solid rgba(0,255,255,.4);border-radius:999px;padding:6px 14px;cursor:pointer}
.c-hint:hover{background:rgba(0,255,255,.1)}
.c-hint[hidden]{display:none}
.c-say-bub{padding:12px 16px;border-radius:16px 16px 16px 4px;font-size:14.5px;line-height:1.45;background:rgba(5,8,13,.9);border:1px solid rgba(0,255,255,.4);box-shadow:0 0 22px -8px rgba(0,255,255,.5)}
@keyframes c-float{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}

.c-step{animation:c-in .45s cubic-bezier(.16,1,.3,1) both}
@keyframes c-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.c-eyebrow{display:flex;align-items:center;gap:10px;font:600 11px 'Space Grotesk',sans-serif;letter-spacing:.2em;text-transform:uppercase;color:var(--cy)}
.c-eyebrow::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--cy);box-shadow:0 0 10px var(--cy)}
.c-mod{margin:26px 0 8px;font-size:15px;color:var(--mu)}
.c-mod b{color:#fff;font-weight:600}
.c-modintro{margin:0 0 26px;padding:14px 18px;border-radius:14px;background:rgba(255,224,138,.07);border:1px solid rgba(255,224,138,.22);border-left:3px solid #ffe08a;font-size:15px;color:rgba(255,255,255,.9)}
.c-title{margin:10px 0 6px;font-size:clamp(1.7rem,5vw,2.5rem);line-height:1.12;font-weight:500;letter-spacing:-.02em}
.c-badge{display:inline-block;margin-top:6px;padding:3px 12px;border-radius:99px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);color:#ffe08a;font-size:12px}

/* Contenu d'un défi */
.c-body p{margin:0 0 14px;font-weight:300;font-size:16.5px;color:rgba(255,255,255,.88)}
.c-body strong{font-weight:600;color:#fff}
.c-body h4{margin:34px 0 10px;font:600 12px 'Space Grotesk',sans-serif;letter-spacing:.2em;text-transform:uppercase;color:#fff}
.c-body h4::before{content:'// ';color:var(--cy)}
.c-body .schema{display:block;margin:22px 0;padding:20px;border-radius:20px;background:rgba(255,255,255,.04);border:1px solid var(--line);text-align:center}
.c-body .schema svg{width:min(100%,340px);height:auto}
.c-body svg .l{stroke:var(--cy);stroke-width:2.4;fill:none;stroke-linecap:round;stroke-linejoin:round}
.c-body svg .a{stroke:var(--vi);stroke-width:2.6;fill:none;stroke-linecap:round;stroke-linejoin:round}
.c-body svg .g{stroke:var(--ok);stroke-width:3;fill:none;stroke-linecap:round;stroke-linejoin:round}
.c-body svg .r{stroke:var(--no);stroke-width:3;fill:none;stroke-linecap:round;stroke-linejoin:round}
.c-body svg .m{stroke:rgba(255,255,255,.55);stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.c-body svg text{fill:#fff;font:600 11px 'Space Grotesk',sans-serif}
.c-body svg text.t2{fill:rgba(255,255,255,.66);font-weight:500;font-size:10.5px}
.c-body svg .d{stroke:rgba(255,255,255,.55);stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.c-body .consigne{margin:20px 0;padding:16px 20px;border-radius:14px;background:rgba(0,255,255,.08);border:1px solid rgba(0,255,255,.22);border-left:3px solid var(--cy)}
.c-body .consigne p{margin:0}
.c-body .limite{margin:14px 0 8px;padding:14px 18px;border-left:3px solid var(--vi);background:rgba(131,56,236,.08);border-radius:0 12px 12px 0;color:var(--mu);font-size:15px;font-weight:300}
.c-body .limite strong{color:#fff}
.c-lab{margin:8px 0 14px;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#05080d}
.c-lab iframe{display:block;width:100%;height:860px;border:0}
.c-labnote{font-size:14px;color:var(--mu)}
.c-skip{font-size:13px;color:var(--mu);background:transparent;border:0;cursor:pointer;padding:8px 2px;text-decoration:underline}
.c-skip:hover{color:var(--cy)}
.c-sw{display:flex;gap:6px;padding:4px 4px 8px}
.c-sw a{flex:1;text-align:center;padding:9px 8px;border-radius:10px;border:1px solid var(--line);color:#fff;text-decoration:none;font-size:13px}
.c-sw a.cur{border-color:var(--cy);color:var(--cy);background:rgba(0,255,255,.1)}
.c-body .retenir{margin:26px 0 8px;padding:18px 22px;border-radius:14px;background:rgba(131,56,236,.12);border:1px solid rgba(131,56,236,.35);border-left:3px solid var(--vi);color:#fff;font-style:italic}

/* Exercice */
ul.opts.c-ex{list-style:none;margin:12px 0}
.c-q{list-style:none;padding:14px 16px;margin:10px 0;border-radius:14px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.14);transition:border-color .25s,background .25s,transform .15s}
.c-q.c-a{cursor:pointer}
.c-q.c-a:hover{border-color:var(--cy);background:rgba(0,255,255,.07)}
.c-q.c-a:active{transform:scale(.995)}
.c-q.c-a::before{content:'○  ';color:var(--cy)}
.c-q:not(.c-rev) .why,.c-q:not(.c-rev) .bucket,.c-q:not(.c-rev) .mark,.c-q:not(.c-rev) br{display:none}
.c-q.c-good{border-color:var(--ok);background:rgba(57,255,20,.09)}
.c-q.c-bad{border-color:var(--no);background:rgba(255,0,128,.09)}
.c-good .mark,.c-good .bucket{color:var(--ok);font-weight:600}
.c-bad .mark,.c-bad .bucket{color:var(--no);font-weight:600}
.c-q.c-rev .why{display:block;margin-top:8px;font-size:14.5px;color:var(--mu)}
.c-rev .c-choices{display:none}
.c-choices{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.c-cb,.c-tb{font-size:13px;font-weight:500;color:#fff;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.28);border-radius:999px;padding:9px 16px;cursor:pointer;transition:border-color .25s,background .25s,color .25s}
.c-cb:hover,.c-tb:hover{border-color:var(--cy);color:var(--cy);background:rgba(0,255,255,.08)}
.c-box{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:12px 0 16px}
.c-info{flex:1;min-width:170px;font-weight:600;font-size:15px}
.c-hide{display:none!important}

/* Félicitations */
.c-win{margin:26px 0 8px;padding:28px 22px;border-radius:22px;text-align:center;border:1px solid rgba(57,255,20,.5);background:linear-gradient(160deg,rgba(57,255,20,.14),rgba(0,255,255,.09));animation:c-pop .55s cubic-bezier(.2,1.4,.4,1) both}
@keyframes c-pop{from{opacity:0;transform:scale(.92) translateY(14px)}to{opacity:1;transform:none}}
.c-win-img{width:92px;height:auto;margin:-6px auto 6px;display:block;animation:c-jump .8s cubic-bezier(.3,1.5,.5,1) both;filter:drop-shadow(0 0 16px rgba(0,255,255,.4))}
@keyframes c-jump{0%{transform:translateY(0) scale(1)}35%{transform:translateY(-26px) scale(1.06,1.1)}70%{transform:translateY(0) scale(1.08,.92)}100%{transform:none}}
.c-win-t{font-size:1.55rem;font-weight:600;letter-spacing:-.01em}
.c-win-s{margin:6px 0 20px;color:#c4cdd5;font-size:15.5px}
.c-win-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.c-next{font:600 15px/1 'Space Grotesk',sans-serif;color:#041015;background:linear-gradient(90deg,var(--cy),var(--vi));border:0;border-radius:999px;padding:17px 32px;cursor:pointer;box-shadow:0 8px 28px rgba(0,255,255,.32);transition:transform .2s,box-shadow .2s}
.c-next:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(0,255,255,.45)}
.c-foot{display:flex;justify-content:flex-start;margin:22px 0 0}
.c-prev{font-size:13px;color:var(--mu);background:transparent;border:0;cursor:pointer;padding:8px 2px}
.c-prev:hover{color:var(--cy)}

/* Flash + confettis */
.c-flash{position:fixed;inset:0;z-index:100;pointer-events:none;background:radial-gradient(circle at 50% 45%,rgba(255,255,255,.85),rgba(0,255,255,.55) 25%,rgba(131,56,236,.25) 50%,transparent 72%);animation:c-fl .8s ease-out forwards}
@keyframes c-fl{0%{opacity:0}18%{opacity:1}100%{opacity:0}}
.c-conf{position:fixed;left:50%;top:45%;width:9px;height:14px;border-radius:2px;z-index:101;pointer-events:none;animation:c-cf 1.3s cubic-bezier(.15,.7,.3,1) forwards}
@keyframes c-cf{0%{opacity:1;transform:translate(0,0) rotate(0)}100%{opacity:0;transform:translate(var(--dx),var(--dy)) rotate(var(--r))}}

@media (max-width:560px){.c-say-img{width:60px}.c-brand span{display:none}.c-body p{font-size:16px}}
@media (prefers-reduced-motion:reduce){.c-flash,.c-conf{display:none}.c-step,.c-win,.c-win-img,.c-say-img{animation:none!important}}
.c-fail{margin:22px 0;padding:22px;border:1px solid rgba(255,190,110,.45);border-radius:18px;background:rgba(255,190,110,.06);text-align:center}
.c-fail-t{font-weight:700;font-size:18px;margin-bottom:6px}
.c-fail-s{color:#c4cdd5;font-size:15px;margin-bottom:16px}
.c-num{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;margin-right:8px;border-radius:50%;background:var(--cy);color:#06222a;font-weight:700;font-size:13px}
@keyframes c-shk{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.c-shake{animation:c-shk .35s;border-color:rgba(255,150,150,.7)!important}
@media (prefers-reduced-motion:reduce){.c-shake{animation:none}}

.c-mission{margin:22px 0;padding:18px 18px 20px;border:1px solid rgba(0,255,255,.35);border-radius:16px;background:rgba(0,255,255,.05)}
.c-mission h4{margin:0 0 6px}
.c-mission p{margin:0 0 14px}