header{position:fixed;top:0;left:0;right:0;z-index:100;background:#ffffffeb;backdrop-filter:blur(12px);border-bottom:1px solid var(--bordure);padding:0 2.5rem;height:64px;display:flex;align-items:center;justify-content:space-between}.breadcrumb{margin-top:64px;padding:1rem 2.5rem;font-size:.8rem;color:var(--texte-sec);background:var(--gris-doux);border-bottom:1px solid var(--bordure)}.breadcrumb a{color:var(--bleu-mer);text-decoration:none}.breadcrumb span{margin:0 6px}.page-hero{background:linear-gradient(160deg,var(--blanc-pur) 0%,var(--blanc-mer) 100%);padding:3rem 2.5rem 2rem;border-bottom:1px solid var(--bordure)}.page-hero-inner{max-width:900px;margin:0 auto}.page-tag{display:inline-block;font-size:.75rem;font-weight:500;color:var(--bleu-mer);background:var(--blanc-mer);border:1px solid var(--bordure);padding:.3rem .85rem;border-radius:99px;margin-bottom:1rem}.page-title{font-family:Lora,serif;font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:500;line-height:1.2;color:var(--bleu-nuit);margin-bottom:.75rem}.page-sub{font-size:1rem;color:var(--texte-sec);line-height:1.7;font-weight:300;max-width:600px}.main-layout{max-width:900px;margin:0 auto;padding:2.5rem;display:grid;grid-template-columns:1fr 380px;gap:2rem;align-items:start}.calc-card{background:#fff;border:1px solid var(--bordure);border-radius:20px;padding:2rem;box-shadow:0 4px 24px #1a3a5c12;position:sticky;top:80px}.calc-title{font-family:Lora,serif;font-size:1.2rem;font-weight:500;color:var(--bleu-nuit);margin-bottom:1.5rem;display:flex;align-items:center;gap:8px}.field-group{margin-bottom:1.25rem}label{display:block;font-size:.85rem;font-weight:500;color:var(--bleu-nuit);margin-bottom:6px}.label-hint{font-size:.75rem;color:var(--texte-sec);font-weight:300;margin-left:6px}input[type=range]{width:100%;-webkit-appearance:none;height:6px;border-radius:99px;background:var(--bordure);outline:none;margin:8px 0 4px}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--bleu-mer);cursor:pointer;box-shadow:0 2px 8px #2e86c14d;transition:transform .15s}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.2)}.range-labels{display:flex;justify-content:space-between;font-size:.72rem;color:var(--texte-sec)}.value-display{display:inline-block;background:var(--blanc-mer);border:1px solid var(--bordure);border-radius:8px;padding:2px 10px;font-size:.9rem;font-weight:500;color:var(--bleu-mer);min-width:60px;text-align:center}.ppo2-toggle{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:6px}.ppo2-btn{padding:.6rem;border-radius:10px;border:1.5px solid var(--bordure);background:#fff;cursor:pointer;text-align:center;transition:all .2s}.ppo2-btn:hover{border-color:var(--bleu-ciel)}.ppo2-btn.active{border-color:var(--bleu-mer);background:var(--blanc-mer)}.ppo2-btn .val{font-size:1.1rem;font-weight:500;color:var(--bleu-nuit);display:block}.ppo2-btn.active .val{color:var(--bleu-mer)}.ppo2-btn .desc{font-size:.7rem;color:var(--texte-sec);margin-top:2px}.result-box{margin-top:1.5rem;border-radius:14px;overflow:hidden}.result-main{background:var(--bleu-nuit);padding:1.25rem 1.5rem;text-align:center}.result-label{font-size:.78rem;color:#ffffff80;letter-spacing:.06em;text-transform:uppercase;margin-bottom:6px}.result-value{font-family:Lora,serif;font-size:3rem;font-weight:500;color:var(--bleu-ciel);line-height:1}.result-unit{font-size:1.2rem;color:#ffffff80;margin-left:4px}.result-sub{font-size:.8rem;color:#fff6;margin-top:6px}.result-warning{background:#fef3e8;border:1px solid #F5A623;border-top:none;padding:.75rem 1rem;font-size:.8rem;color:#7a5200;display:none;align-items:flex-start;gap:8px}.result-warning.visible{display:flex}.result-safe{background:#e8f5ee;border:1px solid #27AE60;border-top:none;padding:.75rem 1rem;font-size:.8rem;color:#1a5c30;display:flex;align-items:center;gap:8px}.formula-box{margin-top:1.25rem;background:var(--gris-doux);border-radius:10px;padding:.85rem 1rem;font-size:.82rem;color:var(--texte-sec)}.formula-box code{font-family:Courier New,monospace;font-size:.85rem;color:var(--bleu-mer);background:var(--blanc-mer);padding:2px 6px;border-radius:4px}.content-col h2{font-family:Lora,serif;font-size:1.4rem;font-weight:500;color:var(--bleu-nuit);margin:2rem 0 .75rem;line-height:1.3}.content-col h2:first-child{margin-top:0}.content-col h3{font-size:1rem;font-weight:500;color:var(--bleu-nuit);margin:1.5rem 0 .5rem}.content-col p{font-size:.95rem;color:var(--texte-sec);line-height:1.8;margin-bottom:1rem;font-weight:300}.content-col strong{color:var(--bleu-nuit);font-weight:500}.info-box{background:var(--blanc-mer);border-left:3px solid var(--bleu-mer);border-radius:0 10px 10px 0;padding:1rem 1.25rem;margin:1.25rem 0}.info-box p{margin:0;font-size:.88rem}.warning-box{background:#fef9e7;border-left:3px solid var(--ambre);border-radius:0 10px 10px 0;padding:1rem 1.25rem;margin:1.25rem 0}.warning-box p{margin:0;font-size:.88rem;color:#7a5200}.data-table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.88rem}.data-table th{background:var(--bleu-nuit);color:#fff;padding:.6rem .85rem;text-align:left;font-weight:500}.data-table td{padding:.6rem .85rem;border-bottom:1px solid var(--bordure);color:var(--texte-sec)}.data-table tr:nth-child(2n) td{background:var(--gris-doux)}.data-table td strong{color:var(--bleu-nuit)}.faq-item{border-bottom:1px solid var(--bordure);padding:1rem 0}.faq-q{font-size:.95rem;font-weight:500;color:var(--bleu-nuit);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem}.faq-q:after{content:"+";font-size:1.25rem;color:var(--bleu-mer);flex-shrink:0;transition:transform .2s}.faq-item.open .faq-q:after{transform:rotate(45deg)}.faq-a{font-size:.88rem;color:var(--texte-sec);line-height:1.7;margin-top:.75rem;display:none;font-weight:300}.faq-item.open .faq-a{display:block}.autres-outils{background:var(--gris-doux);border-top:1px solid var(--bordure);padding:3rem 2.5rem}.autres-inner{max-width:900px;margin:0 auto}.autres-titre{font-family:Lora,serif;font-size:1.3rem;font-weight:500;color:var(--bleu-nuit);margin-bottom:1.25rem}.autres-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.autre-card{background:#fff;border:1px solid var(--bordure);border-radius:12px;padding:1rem 1.25rem;text-decoration:none;color:inherit;transition:transform .2s,box-shadow .2s;display:flex;align-items:center;gap:12px}.autre-card:hover{transform:translateY(-2px);box-shadow:0 6px 20px #1a3a5c17}.autre-emoji{font-size:1.5rem}.autre-info{flex:1}.autre-name{font-size:.9rem;font-weight:500;color:var(--bleu-nuit)}.autre-desc{font-size:.78rem;color:var(--texte-sec);margin-top:2px}footer{background:var(--bleu-nuit);color:#ffffff80;padding:2rem 2.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}@media(max-width:768px){.main-layout{grid-template-columns:1fr;padding:1.5rem;display:flex;flex-direction:column}.calc-card{position:static;order:-1}.content-col{order:1}nav a:not(.btn-nav){display:none}}