.header-actions{display:flex;align-items:center;gap:8px}.course-link{text-decoration:none}
.warmup-card{border-top:4px solid #d97706;background:linear-gradient(180deg,#fffbeb,#fff 48%)}.warmup-kicker{margin:0 0 6px;color:#b45309;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.warmup-card h2{margin:0 0 8px;font-size:19px}.warmup-intro{margin:0 0 16px;color:#64748b;font-size:14px}.warmup-item+.warmup-item{margin-top:18px;padding-top:16px;border-top:1px solid #fde68a}.warmup-prompt{margin:0 0 10px;font-weight:800}.warmup-choices{display:flex;flex-wrap:wrap;gap:8px}.warmup-choice{display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border:1px solid #fcd34d;border-radius:11px;background:#fff;color:#0f172a;font-weight:750;cursor:pointer}.warmup-choice:hover:not(:disabled){border-color:#d97706;background:#fffbeb}.warmup-choice:disabled{cursor:default}.warmup-mark{font-weight:900;line-height:1}.warmup-choice.is-correct{border-color:#15803d;background:#dcfce7;color:#14532d;box-shadow:0 0 0 2px #86efac}.warmup-choice.is-correct .warmup-mark{color:#15803d}.warmup-choice.is-wrong{border-color:#b91c1c;background:#fee2e2;color:#7f1d1d}.warmup-choice.is-wrong .warmup-mark{color:#dc2626}.warmup-choice.is-muted{opacity:.42;filter:grayscale(.35);background:#f8fafc;border-color:#e2e8f0;color:#64748b}.warmup-verdict{margin:12px 0 0;font-weight:800}.warmup-verdict.is-good{color:#15803d}.warmup-verdict.is-bad{color:#b91c1c}.warmup-explain{margin:8px 0 0;padding:11px 13px;border-radius:11px;background:#ecfeff;border:1px solid #a5f3fc;color:#155e75;font-size:14px}
.equation-card{border-top:4px solid #0891b2}.equation-intro{margin:-5px 0 12px;color:#64748b;font-size:13px}.equation-line{margin:7px 0;padding:10px 12px;border-radius:9px;background:linear-gradient(90deg,#ecfeff,#f8fafc);font-family:"Cambria Math",Cambria,serif;font-size:18px;color:#164e63;text-align:center}
.recap-card{border-top:4px solid #0f766e;background:linear-gradient(180deg,#f0fdfa,#fff 42%)}.recap-kicker{margin:0 0 6px;color:#0f766e;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.recap-card h2{margin:0 0 10px;font-size:19px}.recap-section{margin:14px 0 6px;color:#0f766e;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.recap-section:first-of-type{margin-top:4px}.recap-lead{margin:0 0 4px;color:#334155}.recap-points{margin:0;padding:0 0 0 18px}.recap-points li{margin:6px 0;color:#0f172a}.recap-watch{margin:14px 0 0;padding:11px 13px;border-radius:11px;background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;font-size:14px}.recap-watch strong{color:#c2410c}
.diagram svg{width:100%;height:auto;display:block}.diagram svg.moody-chart{min-height:280px}
.diagram-zoomable{cursor:zoom-in}
.diagram-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}.diagram-head h2{margin:0}
.diagram-switch{display:flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:12px;background:#fff;flex-shrink:0}
.diagram-switch button{padding:7px 12px;border:0;border-radius:9px;background:none;color:var(--muted);font-weight:800;cursor:pointer}
.diagram-switch button.active{background:var(--blue);color:#fff}
.diagram-hint{margin:8px 0 0;color:var(--muted);font-size:12px;font-weight:700}
@media(max-width:560px){.diagram-head{flex-wrap:wrap}}
body.diagram-fs-open{overflow:hidden}
.diagram[hidden]{display:none!important}
.diagram-fs{position:fixed;inset:0;z-index:35;display:flex;flex-direction:column;width:100vw;height:100vh;height:100dvh;background:#d9edf7}
.diagram-fs[hidden]{display:none!important}
.diagram-fs-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-shrink:0;padding:10px 16px;background:linear-gradient(135deg,#0c4a6eee,#075985ee);color:#fff;backdrop-filter:blur(12px);box-shadow:0 2px 12px #0f172a22}
.diagram-fs-bar strong{font-size:16px;letter-spacing:0.02em}
.diagram-fs-bar .ghost{background:#ffffff18;border-color:#ffffff44;color:#fff;transition:background .15s}
.diagram-fs-bar .ghost:hover{background:#ffffff30}
.diagram-fs-stage{position:relative;flex:1 1 auto;min-height:0;height:100%;cursor:grab;touch-action:none;background:#d9edf7}
.diagram-fs-stage:active{cursor:grabbing}
.diagram-fs-stage canvas{position:absolute;inset:0;z-index:0;display:block;width:100%!important;height:100%!important}
.diagram-fs-labels{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:2}
.diagram-fs-label{position:absolute;transform:translate(-50%,-120%);padding:6px 11px;border-radius:10px;background:#ffffffee;color:#0f172a;font-weight:800;font-size:13px;white-space:nowrap;box-shadow:0 4px 16px #0f172a1a,0 1px 3px #0f172a12;backdrop-filter:blur(6px);border:1px solid #e2e8f022;transition:opacity .2s}
.diagram-fs-label.is-force{color:#9f1239;border-color:#fecdd322}
.diagram-fs-label.is-water{color:#075985;border-color:#bae6fd22}
.diagram-fs-hint{margin:0;padding:8px 16px 12px;background:linear-gradient(135deg,#0c4a6eee,#075985ee);color:#e0f2fe;font-size:12px;font-weight:700;backdrop-filter:blur(12px)}
.moody-overlay{position:fixed;inset:0;z-index:40;display:grid;place-items:center;padding:18px;background:#0f172a99}
.moody-dialog{width:min(1100px,100%);max-height:calc(100vh - 36px);overflow:auto;padding:16px 18px 18px;border-radius:18px;background:#fff;box-shadow:0 24px 60px #0f172a33}
.moody-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px}.moody-head h2{margin:0;font-size:20px}
.moody-big svg{width:100%;height:auto;display:block}
.moody-cursors{display:grid;gap:12px;margin-top:14px}
.moody-cursors label{display:grid;grid-template-columns:110px 1fr 110px;align-items:center;gap:10px;font-weight:700;color:#0f172a}
.moody-cursors input[type=range]{width:100%;accent-color:#b91c1c}
.moody-cursors output{font-variant-numeric:tabular-nums;color:#0f766e}
.moody-readout{margin:4px 0 0;padding:10px 12px;border-radius:10px;background:#fff7ed;color:#9a3412}
@media(max-width:640px){.moody-cursors label{grid-template-columns:1fr;gap:4px}}
@media(max-width:560px){.course-link{padding:8px 10px;font-size:12px}.brand small{display:none}}
.software-link{display:inline-flex;align-items:center;gap:8px;padding:11px 15px;border:0;border-radius:11px;background:#082f49;color:#fff;font-weight:850;cursor:pointer}.software-link span{color:#67e8f9;font-size:20px}.hero-actions{position:relative;z-index:1;display:flex;align-items:center;gap:14px;margin-top:25px}.hero-actions small{color:#bae6fd;font-weight:750}.hero-software{display:inline-flex;align-items:center;gap:9px;padding:13px 18px;border:1px solid #67e8f9;border-radius:13px;background:#fff;color:#075985;font-weight:900;cursor:pointer;box-shadow:0 10px 24px #02061722}.hero-software span{font-size:22px;color:#0891b2}
.software-shell{display:grid;grid-template-columns:280px minmax(0,1fr);min-height:calc(100vh - 128px);overflow:hidden;border:1px solid #cbd5e1;border-radius:24px;background:#e8f1f5;box-shadow:0 28px 70px #082f4920}.software-sidebar{padding:22px 15px;background:#082f49;color:#fff}.software-title{display:flex;align-items:center;gap:12px;padding:4px 7px 20px;border-bottom:1px solid #ffffff1c}.software-title p,.software-title h1{margin:0}.software-title p{color:#67e8f9;font-size:10px;font-weight:900;letter-spacing:.14em}.software-title h1{font-size:21px}.software-orbit{position:relative;width:38px;height:38px;border:1px solid #67e8f9;border-radius:50%}.software-orbit:before,.software-orbit:after{content:"";position:absolute;border-radius:50%}.software-orbit:before{inset:8px;border:2px solid #fff}.software-orbit:after{width:7px;height:7px;top:1px;left:15px;background:#67e8f9}.software-group{margin-top:20px}.software-group>p{margin:0 8px 7px;color:#7dd3fc;font-size:10px;font-weight:900;letter-spacing:.14em;text-transform:uppercase}.software-module{display:flex;align-items:center;gap:11px;width:100%;padding:10px;border:1px solid transparent;border-radius:12px;background:transparent;color:#dbeafe;text-align:left;cursor:pointer}.software-module:hover{background:#ffffff0b}.software-module.active{border-color:#22d3ee55;background:#0e7490;color:#fff;box-shadow:0 8px 18px #02061720}.software-module strong,.software-module small{display:block}.software-module strong{font-size:14px}.software-module small{margin-top:2px;color:#bae6fd;font-size:11px}.module-icon{display:grid;flex:0 0 34px;height:34px;place-items:center;border-radius:10px;background:#ffffff12;color:#67e8f9;font-size:18px}.software-module.active .module-icon{background:#fff;color:#0e7490}.software-study{width:100%;margin-top:25px;padding:11px;border:1px solid #ffffff24;border-radius:11px;background:transparent;color:#bae6fd;font-weight:800;cursor:pointer}.software-main{min-width:0;padding:27px}.software-head{display:flex;justify-content:space-between;gap:20px;margin-bottom:20px}.software-head h2{margin:2px 0 6px;font-size:clamp(28px,4vw,42px);line-height:1}.software-head>div>p:last-child{max-width:750px;margin:0;color:#475569}.eyebrow-dark{margin:0;color:#0e7490!important;font-size:11px;font-weight:900;letter-spacing:.14em}.live-badge{align-self:flex-start;display:inline-flex;align-items:center;gap:7px;padding:8px 11px;border:1px solid #99f6e4;border-radius:999px;background:#f0fdfa;color:#115e59;font-size:12px;font-weight:850;white-space:nowrap}.live-badge i{width:7px;height:7px;border-radius:50%;background:#14b8a6;box-shadow:0 0 0 4px #99f6e466}.software-grid{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(300px,1fr) minmax(260px,.85fr);gap:14px;align-items:start}.software-panel{min-width:0;padding:19px;border:1px solid #cbd5e1;border-radius:16px;background:#fff;box-shadow:0 9px 24px #082f490c}.panel-heading{display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid #e2e8f0}.panel-heading>span{display:grid;width:31px;height:31px;place-items:center;border-radius:9px;background:#e0f2fe;color:#0369a1;font-size:11px;font-weight:900}.panel-heading h3,.panel-heading p{margin:0}.panel-heading h3{font-size:16px}.panel-heading p{color:#64748b;font-size:12px}.software-fields{display:grid;gap:11px;margin-top:16px}.software-fields label>span{display:block;margin-bottom:5px;color:#475569;font-size:12px;font-weight:800}.engineering-input{display:flex;align-items:center;overflow:hidden;border:1px solid #cbd5e1;border-radius:10px;background:#f8fafc}.engineering-input:focus-within{border-color:#0891b2;box-shadow:0 0 0 3px #cffafe}.engineering-input input{background:transparent;font-weight:750}.engineering-input b{padding:0 10px;color:#64748b;font-size:12px;white-space:nowrap}.reset-calc{width:100%;margin-top:14px;padding:9px;border:1px solid #cbd5e1;border-radius:10px;background:#fff;color:#475569;font-size:12px;font-weight:800;cursor:pointer}.software-diagram{display:grid;min-height:285px;place-items:center;margin-top:14px;overflow:hidden;border-radius:12px;background:#f8fafc}.software-diagram svg{display:block;width:100%;height:auto;max-height:330px}.result-stack{margin-top:14px}.result-row{padding:12px 0;border-bottom:1px solid #e2e8f0}.result-row span,.result-row strong{display:block}.result-row span{color:#64748b;font-size:12px;font-weight:750}.result-row strong{margin-top:3px;color:#0f172a;font-size:22px;font-variant-numeric:tabular-nums}.result-row strong small{margin-left:6px;color:#64748b;font-size:12px}.result-row.primary-result{margin:0 -10px;padding:15px 12px;border:1px solid #a5f3fc;border-radius:12px;background:linear-gradient(135deg,#ecfeff,#f0f9ff)}.result-row.primary-result strong{color:#0e7490;font-size:28px}.result-ok{display:flex;align-items:center;gap:7px;margin:14px 0 0;color:#15803d;font-size:12px;font-weight:850}.result-ok span{display:grid;width:21px;height:21px;place-items:center;border-radius:50%;background:#dcfce7}.method-panel{margin-top:14px}.method-panel>.panel-heading{margin-bottom:3px}.method-step{display:grid;grid-template-columns:32px 1fr;gap:10px;padding:13px 2px;border-bottom:1px solid #e2e8f0}.method-step:last-child{border-bottom:0}.method-step>span{color:#0891b2;font-size:11px;font-weight:900}.method-step h4,.method-step p{margin:0}.method-step h4{font-size:14px}.method-step p{margin-top:4px;color:#334155;font-family:"Cambria Math",Cambria,serif;font-size:15px}.calc-error{margin-top:15px;padding:14px;border:1px solid #fecaca;border-radius:11px;background:#fef2f2;color:#991b1b}.calc-error p{margin:4px 0 0;font-size:13px}
@media(max-width:1050px){.software-shell{grid-template-columns:230px minmax(0,1fr)}.software-grid{grid-template-columns:1fr 1fr}.result-panel{grid-column:1/-1}.result-stack{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.result-row{border:0}.result-row.primary-result{margin:0}}
@media(max-width:760px){main{padding-left:10px;padding-right:10px}.software-shell{display:block;border-radius:18px}.software-sidebar{padding:15px}.software-title{padding-bottom:13px}.software-sidebar nav{display:flex;gap:8px;overflow-x:auto;padding:12px 0}.software-group{display:contents}.software-group>p{display:none}.software-module{flex:0 0 190px;background:#ffffff0b}.software-study{margin-top:2px}.software-main{padding:18px 13px}.software-head{display:block}.live-badge{margin-top:12px}.software-grid{grid-template-columns:1fr}.result-panel{grid-column:auto}.result-stack{display:block}.hero-actions{align-items:flex-start;flex-direction:column}.topbar{flex-wrap:wrap;row-gap:8px}.header-actions{flex-wrap:wrap;justify-content:flex-end}.course-link{text-transform:capitalize}.course-link-verb{display:none}}
@media(max-width:520px){.software-link{padding:9px 10px;font-size:12px}.software-link span{display:none}.software-title h1{font-size:18px}.software-head h2{font-size:30px}}
.software-advanced{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:7px}.software-advanced>p{grid-column:1/-1;margin:0 2px;color:#7dd3fc;font-size:10px;font-weight:900;letter-spacing:.14em;text-transform:uppercase}.software-tool{min-width:0;padding:9px 10px;border:1px solid #ffffff2e;border-radius:10px;background:#ffffff0f;color:#e0f2fe;font:700 11px/1.3 inherit;text-align:left;cursor:pointer;overflow-wrap:anywhere;hyphens:auto}.software-tool:hover,.software-tool:focus-visible{border-color:#22d3ee66;background:#0e7490;color:#fff}
/* Sur ordinateur, la liste des modules mesure a elle seule plus d un ecran : c est elle
   qui defile, dans la barre laterale, pendant que les modules avances restent epingles
   en bas et visibles sans defilement. Meme principe que le bandeau horizontal du mobile. */
@media(min-width:761px){
  .software-shell{align-items:start}
  .software-sidebar{display:flex;flex-direction:column;max-height:calc(100vh - 128px)}
  .software-title,.software-advanced,.software-sidebar>.software-study{flex:0 0 auto}
  .software-sidebar nav{flex:1 1 auto;min-height:0;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}
  .software-sidebar nav::-webkit-scrollbar{width:6px}
  .software-sidebar nav::-webkit-scrollbar-thumb{border-radius:3px;background:#ffffff33}
  .software-sidebar>.software-study{margin-top:14px}
}
/* Sous 940 px de haut, les descriptions des modules coutent 294 px : elles passent en
   infobulle pour que la liste tienne sans defilement. */
@media(min-width:761px) and (max-height:940px){.software-module small{display:none}.software-module{padding:8px 10px}}
.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.resource{display:block;padding:21px;border:1px solid var(--line);border-radius:22px;background:var(--paper);box-shadow:var(--shadow);color:inherit;text-decoration:none;transition:.2s}.resource:hover,.resource:focus-visible{transform:translateY(-3px);border-color:#67e8f9}.resource-mark{display:grid;width:38px;height:38px;place-items:center;margin-bottom:18px;border-radius:12px;background:#e0f2fe;color:var(--blue);font-weight:900;font-size:13px}.resource h3{margin:0 0 7px;font-size:19px}.resource p{margin:0;color:var(--muted)}
@media(max-width:850px){.resource-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.resource-grid{grid-template-columns:1fr}}
.diagram-zoom-overlay{position:fixed;inset:0;z-index:38;display:flex;align-items:center;justify-content:center;padding:24px;background:#fffffff7;overflow:auto;-webkit-overflow-scrolling:touch;touch-action:manipulation}
.diagram-zoom-close{position:fixed;top:16px;right:16px;z-index:39;width:48px;height:48px;border:none;border-radius:50%;background:#0f172aee;color:#fff;font-size:24px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 18px #0f172a33;transition:background .15s}
.diagram-zoom-close:hover,.diagram-zoom-close:active{background:#1e293b}
.diagram-zoom-content{width:min(95vw,1200px);max-height:95vh}
.diagram-zoom-content svg{width:100%;height:auto;display:block}
body.pdf-open{overflow:hidden}
.pdf-overlay{position:fixed;inset:0;z-index:42;display:flex;flex-direction:column;width:100%;height:100%;height:100dvh;background:#334155}
.pdf-overlay-bar{display:flex;align-items:center;gap:10px;flex-shrink:0;padding:10px 12px calc(10px + env(safe-area-inset-top,0px));background:linear-gradient(135deg,#0c4a6eee,#075985ee);color:#fff;box-shadow:0 2px 12px #0f172a22}
.pdf-overlay-bar strong{flex:1;font-size:16px;letter-spacing:.02em}
.pdf-status{color:#bae6fd;font-size:12px;font-weight:700;white-space:nowrap}
.pdf-overlay-bar .ghost{background:#ffffff18;border-color:#ffffff44;color:#fff;text-decoration:none}
.pdf-pages{flex:1 1 auto;min-height:0;overflow:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;touch-action:pan-y;padding:8px 8px calc(16px + env(safe-area-inset-bottom,0px))}
.pdf-page{display:block;width:100%;height:auto;margin:0 0 8px;background:#fff;box-shadow:0 8px 24px #00000055}
.pdf-page canvas{display:block;width:100%;height:auto}
.pdf-fallback{margin:24px 12px;padding:16px;border-radius:12px;background:#fff;color:#0f172a}