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h2{color:var(--text-main);margin-bottom:1rem;font-size:1.25rem;font-weight:800}.calc-article h3{color:var(--accent);margin:1.25rem 0 .5rem;font-size:1rem;font-weight:700}.calc-article p{color:var(--text-dim);margin-bottom:.75rem;font-size:.875rem;line-height:1.8}[data-theme=light] .calc-article h2{color:#0f172a}[data-theme=light] .calc-article h3{color:#b45309}[data-theme=light] .calc-article p{color:#334155}.faq-section{margin-bottom:3rem}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--text-main);user-select:none;justify-content:space-between;align-items:center;padding:14px 4px;font-size:.9rem;font-weight:600;list-style:none;transition:color .2s;display:flex}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:after{content:"+";color:var(--text-dim);flex-shrink:0;margin-left:16px;font-size:1.1rem;transition:color .2s}.faq-item[open] .faq-item__question:after{content:"−";color:var(--accent)}.faq-item__question:hover{color:var(--cyan)}.faq-item__answer{color:var(--text-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}[data-theme=light] .faq-list{gap:8px}[data-theme=light] .faq-item{background:#fff;border:1px solid #0000001a;border-radius:10px;overflow:hidden;box-shadow:0 1px 4px #0000000f}[data-theme=light] .faq-item[open]{border-color:#b4530966 #b4530966 #b4530966 #b45309;border-left-style:solid;border-left-width:3px}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}.calc-related{margin-bottom:3rem}.related-grid{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:.75rem;display:grid}.related-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1rem;text-decoration:none;transition:border-color .2s,transform .15s;display:block}.related-card:hover{border-color:var(--accent);transform:translateY(-2px)}[data-theme=light] .related-card{background:#fff;border-color:#0000001a;box-shadow:0 1px 4px #0000000f}.related-icon{margin-bottom:.4rem;font-size:1.5rem;display:block}.related-name{color:var(--text-main);margin-bottom:.25rem;font-size:.85rem;font-weight:700}.related-desc{color:var(--text-muted);font-size:.75rem;line-height:1.5}[data-theme=light] .related-name{color:#0f172a}[data-theme=light] .related-desc{color:#64748b}#toast-container{z-index:9999;flex-direction:column;gap:.5rem;display:flex;position:fixed;bottom:1.5rem;right:1.5rem}.toast{border:1px solid var(--border);color:var(--text-main);background:#0f0f1ef2;border-radius:10px;max-width:320px;padding:.75rem 1rem;font-size:.83rem;animation:.3s toastIn}[data-theme=light] .toast{background:#fff;box-shadow:0 4px 12px #0000001f}.toast-success{border-left:3px solid #10b981}.toast-warn{border-left:3px solid #f59e0b}.toast-error{border-left:3px solid #ef4444}@keyframes toastIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}#backToTop{background:var(--accent);color:#000;cursor:pointer;opacity:0;pointer-events:none;z-index:998;border:none;border-radius:50%;width:42px;height:42px;font-size:1.1rem;font-weight:700;transition:opacity .3s;position:fixed;bottom:1.5rem;right:5rem}#backToTop.visible{opacity:1;pointer-events:auto}.skip-link{background:var(--accent);color:#000;border-radius:6px;padding:.5rem 1rem;font-weight:700;position:absolute;left:-9999px}.skip-link:focus{z-index:9999;top:1rem;left:1rem}