:root{--primary-color:#3a7bd5;--primary-light:#5e9bff;--primary-dark:#00539c;--secondary-color:#3498db;--text-color:#333;--text-light:#666;--bg-color:#f0f4f8;--card-bg:#fff;--success-color:#2ecc71;--warning-color:#f39c12;--danger-color:#e74c3c;--shear-color:#0e8a72;--border-radius:8px;--box-shadow:0 4px 6px #0000001a;--transition:all .3s ease}.dark-mode{--primary-color:#4a8eff;--primary-light:#6ba5ff;--primary-dark:#06c;--secondary-color:#3498db;--text-color:#f0f0f0;--text-light:#ccc;--bg-color:#121212;--card-bg:#1e1e1e;--success-color:#2ecc71;--warning-color:#f39c12;--danger-color:#e74c3c;--shear-color:#18a184;--box-shadow:0 4px 6px #0000004d}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg-color);color:var(--text-color);transition:var(--transition);font-family:Segoe UI,Roboto,Arial,sans-serif;line-height:1.6}.container{max-width:900px;margin:2rem auto;padding:0 1.5rem}h1{text-align:center;color:var(--primary-dark);text-shadow:0 1px 2px #0000001a;margin-bottom:2rem;font-size:2.2rem;font-weight:600}h2{color:var(--primary-dark);margin-bottom:1.2rem;font-size:1.5rem;font-weight:500}.simulation-form{background:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--box-shadow);transition:var(--transition);margin-bottom:2rem;padding:2rem}.form-group{transition:var(--transition);margin-bottom:1.5rem}label{color:var(--text-color);transition:var(--transition);margin-bottom:.5rem;font-weight:500;display:block}input,select{border-radius:var(--border-radius);background-color:var(--card-bg);width:100%;color:var(--text-color);transition:var(--transition);border:1px solid #ddd;padding:.7rem 1rem;font-size:1rem}input:focus,select:focus{border-color:var(--primary-color);outline:none;box-shadow:0 0 0 3px #3a7bd533}input:disabled,select:disabled{background-color:var(--card-bg);color:var(--text-light);cursor:not-allowed;opacity:.55}#profilAcierGroup{border-radius:var(--border-radius);transition:var(--transition);background-color:#3a7bd50d;border:1px solid #3a7bd533;margin-bottom:1.5rem;padding:1.2rem}.profil-selectors{gap:1rem;display:flex}.profil-selectors select{border-color:var(--secondary-color);flex:1}.profil-type{min-width:120px}.profil-taille{min-width:100px}.profil-taille:disabled{cursor:not-allowed;opacity:.7;background-color:#f5f5f5}.btn-calculer{background:linear-gradient(135deg,var(--primary-color),var(--primary-dark));color:#fff;border-radius:var(--border-radius);cursor:pointer;width:100%;transition:var(--transition);border:none;margin-top:1.5rem;padding:.9rem 1.5rem;font-size:1.1rem;font-weight:500;position:relative;overflow:hidden;box-shadow:0 4px 6px #0000001a}.btn-calculer:hover{background:linear-gradient(135deg,var(--primary-light),var(--primary-color));transform:translateY(-2px);box-shadow:0 6px 12px #00000026}.btn-calculer:active{transform:translateY(1px);box-shadow:0 2px 4px #0000001a}.btn-calculer:after{content:"";opacity:0;transform-origin:50%;background:#ffffff80;border-radius:100%;width:5px;height:5px;position:absolute;top:50%;left:50%;transform:scale(1)translate(-50%,-50%)}.btn-calculer:focus:not(:active):after{animation:1s ease-out ripple}@keyframes ripple{0%{opacity:.5;transform:scale(0)}to{opacity:0;transform:scale(100)}}.resultats{background:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--box-shadow);transition:var(--transition);margin-bottom:2rem;padding:2rem;animation:.5s ease-out fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.resultats-content{margin-bottom:1.5rem}.gauges{border-radius:var(--border-radius);background-color:#3a7bd50d;margin-bottom:1.5rem;padding:1.2rem}.gauge{margin-bottom:1rem}.gauge:last-child{margin-bottom:0}.gauge-header{align-items:baseline;gap:.75rem;margin-bottom:.35rem;font-size:.9rem;display:flex}.gauge-label{font-weight:600}.gauge-detail{color:var(--text-light);font-variant-numeric:tabular-nums;margin-left:auto;font-size:.8rem}.gauge-value{text-align:right;font-variant-numeric:tabular-nums;min-width:3.5em;font-weight:600}.gauge-value.warning{color:var(--warning-color)}.gauge-value.danger{color:var(--danger-color)}.gauge-track{background-color:#7f7f7f2e;border-radius:4px;height:8px;overflow:hidden}.gauge-fill{background-color:var(--success-color);border-radius:4px;height:100%;transition:width .3s}.gauge-fill.warning{background-color:var(--warning-color)}.gauge-fill.danger{background-color:var(--danger-color)}.resultat-item{border-radius:var(--border-radius);transition:var(--transition);background-color:#3a7bd50d;justify-content:space-between;align-items:center;margin-bottom:1rem;padding:1rem;display:flex}.resultats-tabs{border-bottom:1px solid #3a7bd533;margin-bottom:1.5rem;display:flex}.tab-btn{color:var(--text-color);cursor:pointer;transition:var(--transition);background:0 0;border:none;border-bottom:3px solid #0000;margin-right:.5rem;padding:.8rem 1.2rem;font-weight:500}.tab-btn:hover{color:var(--primary-color)}.tab-btn.active{color:var(--primary-color);border-bottom-color:var(--primary-color)}.tab-content{animation:.3s ease-out fadeIn;display:none}.tab-content.active{display:block}.material-properties{width:100%;margin-top:.5rem}.properties-table{border-collapse:collapse;width:100%}.properties-table td{border-bottom:1px solid #3a7bd51a;padding:.5rem}.properties-table tr:last-child td{border-bottom:none}.schema-controls{justify-content:center;gap:.5rem;margin-top:1rem;display:flex}.btn-control{border-radius:var(--border-radius);color:var(--primary-dark);cursor:pointer;transition:var(--transition);background-color:#3a7bd51a;border:none;padding:.5rem 1rem;font-weight:500}.btn-control:hover{background-color:#3a7bd533}.export-controls{flex-wrap:wrap;justify-content:center;gap:1rem;margin-top:2rem;display:flex}.btn-export{background:linear-gradient(135deg,var(--primary-light),var(--primary-color));border-radius:var(--border-radius);color:#fff;cursor:pointer;transition:var(--transition);border:none;padding:.7rem 1.2rem;font-weight:500;box-shadow:0 2px 4px #0000001a}.btn-export:hover{transform:translateY(-2px);box-shadow:0 4px 8px #00000026}.label{color:var(--text-color);margin-right:.5rem;font-weight:500}.valeur{color:var(--primary-dark);transition:var(--transition);background:#3a7bd51a;border-radius:4px;padding:.3rem .8rem;font-size:1.1rem;font-weight:600}.message-alerte{border-radius:var(--border-radius);text-align:center;transition:var(--transition);margin:20px 0;padding:15px;font-weight:600;animation:2s infinite pulse}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.02)}to{transform:scale(1)}}.message-alerte.success{color:#155724;background-color:#d4edda;border:1px solid #c3e6cb}.message-alerte.warning{color:#856404;background-color:#fff3cd;border:1px solid #ffeeba}.message-alerte.danger{color:#721c24;background-color:#f8d7da;border:1px solid #f5c6cb}.schema{text-align:center;border-radius:var(--border-radius);box-shadow:var(--box-shadow);transition:var(--transition);background-color:#3a7bd50d;margin-top:2rem;padding:1.5rem;position:relative;overflow:hidden}#schemaCanvas{background-color:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--box-shadow);cursor:pointer;will-change:transform;transition:var(--transition)}.charge-indicator{pointer-events:none;will-change:transform;background-color:#0000;width:2px;height:100%;position:absolute;transform:translate(0)}.info-bulle{cursor:help;color:#007bff;margin-left:5px;font-size:.8em;display:inline-block;position:relative}.info-bulle:hover:after{content:attr(title);color:#fff;white-space:nowrap;z-index:1;background-color:#333;border-radius:3px;padding:5px;font-size:.9em;position:absolute;bottom:100%;left:50%;transform:translate(-50%)}.avertissement{color:var(--warning-color);border-radius:var(--border-radius);text-align:center;border-left:4px solid var(--warning-color);transition:var(--transition);background-color:#f39c121a;margin-top:2rem;padding:1rem}@media (min-width:1100px){.container{max-width:1360px}.main-content{grid-template-columns:minmax(340px,440px) 1fr;align-items:start;gap:2rem;display:grid}.simulation-form{max-height:calc(100vh - 2rem);margin-bottom:0;position:sticky;top:1rem;overflow-y:auto}}@media (max-width:768px){.container{margin:1rem auto;padding:0 1rem}.simulation-form,.resultats{padding:1.5rem}h1{font-size:1.8rem}.profil-selectors{flex-direction:column;gap:.5rem}.resultat-item{flex-direction:column;align-items:flex-start}.valeur{align-self:flex-end;margin-top:.5rem}}.theme-switch-wrapper{justify-content:flex-end;align-items:center;margin-bottom:1rem;display:flex}.theme-switch{width:50px;height:26px;display:inline-block;position:relative}.theme-switch input{display:none}.slider{cursor:pointer;background-color:#ccc;border-radius:34px;transition:all .4s;position:absolute;inset:0}.slider:before{content:"";background-color:#fff;border-radius:50%;width:18px;height:18px;transition:all .4s;position:absolute;bottom:4px;left:4px}input:checked+.slider{background-color:var(--primary-color)}input:checked+.slider:before{transform:translate(24px)}