:root{--accent:var(--calc-color-math);--accent-glow:#22d3ee26}body{background:var(--calc-bg-page);color:var(--calc-text-primary);margin:0;padding:0;font-family:Inter,sans-serif;line-height:1.6}.main-container{max-width:960px;margin:0 auto;padding:0 20px 32px}.calc-breadcrumb{color:var(--calc-text-muted);max-width:960px;margin:0 auto;padding:10px 20px;font-size:.85rem}.calc-breadcrumb a{color:var(--calc-text-dim);text-decoration:none}.calc-breadcrumb a:hover{color:var(--calc-cyan)}.page-title{text-align:center;letter-spacing:-.02em;margin:10px 0 4px;font-size:2rem;font-weight:800}.page-subtitle{text-align:center;color:var(--calc-text-dim);margin:0 0 16px;font-size:1rem}.tab-nav{background:var(--calc-bg-input);border:1px solid var(--calc-border-default);border-radius:12px;gap:4px;margin-bottom:20px;padding:4px;display:flex}.tab-btn{color:var(--calc-text-dim);cursor:pointer;background:0 0;border:none;border-radius:8px;flex:1;padding:8px 16px;font-family:inherit;font-size:.9rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.tab-btn.active{background:var(--calc-cyan);color:#000}.tab-btn:hover:not(.active){color:var(--calc-text-primary)}.tab-content{display:none}.tab-content.active{display:block}.card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);box-sizing:border-box;border-radius:16px;padding:24px}.card.input-card{border-left:3px solid var(--calc-cyan)}.card.result-card{border-left:3px solid var(--calc-purple)}.calc-layout{grid-template-columns:1fr 1.4fr;align-items:start;gap:20px;display:grid}@media (width<=768px){.calc-layout{grid-template-columns:minmax(0,1fr);overflow:hidden}.card{min-width:0}.act-bar{flex-wrap:wrap}}.btn-swap:focus-visible,.act-btn:focus-visible,.tab-btn:focus-visible{outline:3px solid var(--calc-color-math,#22d3ee);outline-offset:2px}.section-label{color:var(--calc-text-dim);text-transform:uppercase;letter-spacing:.08em;border-bottom:1px solid var(--calc-border-default);margin-bottom:10px;padding-bottom:8px;font-size:.75rem;font-weight:700}.form-group{margin-bottom:14px}.form-label{color:var(--calc-text-dim);text-transform:uppercase;letter-spacing:.05em;margin-bottom:6px;font-size:.8rem;font-weight:600;display:block}.glass-input{background:var(--calc-bg-input);border:1px solid var(--calc-border-strong,var(--calc-border-default));width:100%;color:var(--calc-text-primary);box-sizing:border-box;border-radius:8px;padding:10px 12px;font-family:inherit;font-size:.95rem;transition:border-color .15s}.glass-input:focus{border-color:var(--calc-cyan);outline:none}.btn-swap{background:var(--calc-bg-input);width:100%;color:var(--calc-text-dim);border:1px solid var(--calc-border-default);cursor:pointer;border-radius:8px;margin-top:8px;padding:10px;font-family:inherit;font-size:.95rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.btn-swap:hover{color:var(--calc-cyan);border-color:#22d3ee66}.hero-result{text-align:center;padding:20px 10px 12px}.hero-label{color:var(--calc-text-dim);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px;font-size:.75rem;font-weight:700}.hero-value{color:#fff;letter-spacing:-.02em;word-break:break-all;margin-bottom:4px;font-size:2.4rem;font-weight:800;line-height:1.1}.hero-sub{color:var(--calc-text-dim);font-size:.9rem}.dyn-ref{color:var(--calc-text-muted);min-height:1.1em;margin-top:8px;font-size:.82rem}.act-bar{flex-wrap:wrap;gap:8px;margin-top:14px;display:flex}.act-btn{color:var(--calc-text-dim);cursor:pointer;background:#ffffff0a;border:1px solid #ffffff1a;border-radius:8px;padding:8px 16px;font-family:inherit;font-size:.84rem;font-weight:600;transition:transform .25s,opacity .25s,color .2s,box-shadow .25s}.act-btn:hover{color:var(--calc-cyan);background:#22d3ee14;border-color:#22d3ee4d}.formula-pills{flex-wrap:wrap;gap:8px;margin:20px 0 0;display:flex}.fp{background:#a855f714;border:1px solid #a855f740;border-radius:8px;align-items:baseline;gap:8px;padding:9px 14px;display:inline-flex}.fp-eq{color:var(--calc-purple);font-family:Courier New,monospace;font-size:.88rem}.fp-desc{color:var(--calc-text-dim);font-size:.78rem}.page-sections-outer{max-width:1600px;margin:0 auto;padding:0 1.5rem 3rem}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--calc-text-primary);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:"+";font-family:var(--calc-font-mono);color:var(--calc-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(--calc-cyan)}.faq-item__question:hover{color:var(--calc-cyan)}.faq-item__answer{color:var(--calc-text-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}@media (width<=640px){.main-container{padding:0 12px 24px}.page-title{font-size:1.5rem}.tab-btn{padding:7px 10px;font-size:.82rem}}[data-theme=light]{--accent:var(--calc-color-math);--accent-glow:#0891b226}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 1px 6px #00000012}[data-theme=light] .card.input-card{border-left:3px solid #0891b2}[data-theme=light] .card.result-card{border-left:3px solid #7c3aed}[data-theme=light] .tab-nav{background:#edf2f9;border-color:#0000001a}[data-theme=light] .tab-btn{color:#475569}[data-theme=light] .tab-btn.active{color:#fff;background:#0891b2}[data-theme=light] .glass-input{color:#0f172a;background:#f0f4f9;border-color:#00000026}[data-theme=light] .btn-swap{color:#475569;background:#edf2f9;border-color:#00000026}[data-theme=light] .btn-swap:hover{color:#0891b2;border-color:#0891b266}[data-theme=light] .hero-value{color:#0f172a}[data-theme=light] .hero-sub{color:#475569}[data-theme=light] .dyn-ref{color:#64748b}[data-theme=light] .act-btn{color:#475569;background:#edf2f9;border-color:#00000026}[data-theme=light] .act-btn:hover{color:#0891b2;background:#0891b214;border-color:#0891b24d}[data-theme=light] .fp{background:#7c3aed14;border-color:#7c3aed40}[data-theme=light] .fp-eq{color:#7c3aed}[data-theme=light] .fp-desc{color:#475569}[data-theme=light] .faq-item{border-bottom:none}[data-theme=light] .faq-item__question{color:#0f172a}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after,[data-theme=light] .faq-item__question:hover{color:#0891b2}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f}