.main-container{max-width:1100px;margin:0 auto;padding:40px 20px}.page-header{margin-bottom:20px}.page-title{font-family:var(--calc-font-headline);color:var(--calc-text-primary);letter-spacing:-.02em;margin:0 0 8px;font-size:clamp(1.7rem,3.5vw,2.4rem);font-weight:800}.page-subtitle{color:var(--calc-text-dim);max-width:72ch;margin:0;font-size:1rem;line-height:1.6}.tab-bar{border-bottom:1px solid var(--calc-border-default);gap:4px;margin:20px 0 18px;display:flex;overflow-x:auto}.tab-btn{color:var(--calc-text-faded);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;padding:10px 16px;font-size:.88rem;font-weight:600;transition:color .15s,border-color .15s}.tab-btn:hover{color:var(--calc-text-primary)}.tab-btn.active{color:var(--calc-cyan);border-bottom-color:var(--calc-cyan)}.tab-content[hidden]{display:none}.calc-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:start;gap:24px;display:grid}@media (width<=900px){.calc-grid{grid-template-columns:1fr}}.card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-lg);padding:1.25rem 1.5rem}.card+.card{margin-top:1.25rem}.card-title{font-family:var(--calc-font-headline);text-transform:uppercase;letter-spacing:.05em;color:var(--calc-text-faded);margin:0 0 1rem;font-size:.85rem;font-weight:700}.form-group{flex-direction:column;gap:.4rem;margin-bottom:1rem;display:flex}.form-group:last-child{margin-bottom:0}.form-group label{color:var(--calc-text-faded);font-size:.85rem;font-weight:600}.form-group input{background:var(--calc-bg-input);border:1px solid var(--calc-border-strong);border-radius:var(--calc-radius-md);color:var(--calc-text-primary);font-family:var(--calc-font-mono);padding:.65rem .85rem;font-size:1.05rem;transition:border-color .15s}.form-group input:focus{border-color:var(--calc-cyan);outline:none}.field-hint{color:var(--calc-text-dim);margin:6px 0 0;font-size:.8rem;line-height:1.5}.mode-chips{flex-wrap:wrap;gap:8px;margin-bottom:1.25rem;display:flex}.mode-chip{text-align:center;min-width:120px;color:var(--calc-text-faded);border:1px solid var(--calc-border-subtle);border-radius:var(--calc-radius-md);cursor:pointer;background:#ffffff08;flex:auto;padding:9px 12px;font-size:.84rem;font-weight:600;transition:background .15s,color .15s,border-color .15s}.mode-chip:hover{border-color:var(--calc-cyan)}.mode-chip.active{color:#04222b;background:var(--calc-cyan);border-color:var(--calc-cyan)}.crossover-note{color:var(--calc-text-faded);border:1px solid #22d3ee38;border-left:3px solid var(--calc-cyan);border-radius:var(--calc-radius-md);background:#22d3ee0f;margin-top:1rem;padding:12px 14px;font-size:.85rem;line-height:1.55}.hero-result{text-align:center;padding:.5rem 0 1rem}.hero-label{text-transform:uppercase;letter-spacing:.05em;color:var(--calc-text-faded);margin-bottom:.5rem;font-size:.85rem;font-weight:700}.hero-value{font-family:var(--calc-font-mono);color:var(--calc-cyan);margin-bottom:.4rem;font-size:clamp(2rem,6vw,2.8rem);font-weight:700}.hero-sub{color:var(--calc-text-faded);line-height:1.5}.formula-strip{flex-wrap:wrap;justify-content:center;gap:8px;margin:1rem 0;display:flex}.formula-pill{font-family:var(--calc-font-mono);color:var(--calc-cyan);background:#22d3ee1a;border:1px solid #22d3ee4d;border-radius:999px;padding:6px 12px;font-size:.78rem}.interp-panel{border:1px solid #22d3ee38;border-left:3px solid var(--calc-cyan);border-radius:var(--calc-radius-md);background:#22d3ee0f;margin-top:1rem;padding:14px 16px}.interp-text{color:var(--calc-text-faded);margin:0;font-size:.9rem;line-height:1.65}.data-table tr.row-top{background:#22d3ee1a;font-weight:600}.table-empty{text-align:center;color:var(--calc-text-dim);padding:18px 8px;font-size:.86rem}.why-p{color:var(--calc-text-faded);margin:0 0 1rem;font-size:.92rem;line-height:1.7}.why-p:last-child{margin-bottom:0}.why-formula{font-family:var(--calc-font-mono);color:var(--calc-cyan);border-radius:var(--calc-radius-md);background:#22d3ee14;border:1px solid #22d3ee40;margin:0 0 1rem;padding:12px 16px;font-size:1rem;overflow-x:auto}[data-theme=light] .page-subtitle{color:#475569}[data-theme=light] .field-hint{color:#64748b}[data-theme=light] .tab-bar{border-bottom-color:#0000001f}[data-theme=light] .tab-btn{color:#64748b}[data-theme=light] .tab-btn:hover{color:#0f172a}[data-theme=light] .tab-btn.active{color:#0891b2;border-bottom-color:#0891b2}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .card-title{color:#64748b}[data-theme=light] .form-group label{color:#334155}[data-theme=light] .form-group input{color:#0f172a;background:#f0f4f9;border-color:#00000026}[data-theme=light] .mode-chip{color:#475569;background:#f0f4f9;border-color:#0000001f}[data-theme=light] .mode-chip:hover{border-color:#0891b2}[data-theme=light] .mode-chip.active{color:#fff;background:#0891b2;border-color:#0891b2}[data-theme=light] .crossover-note{color:#334155;background:#eff9fb;border-color:#0891b24d #0891b24d #0891b24d #0891b2}[data-theme=light] .hero-label{color:#64748b}[data-theme=light] .hero-value{color:#0891b2}[data-theme=light] .hero-sub{color:#475569}[data-theme=light] .formula-pill{color:#0891b2;background:#0891b21a;border-color:#0891b24d}[data-theme=light] .interp-panel{background:#eff9fb;border-color:#0891b24d #0891b24d #0891b24d #0891b2}[data-theme=light] .interp-text{color:#334155}[data-theme=light] .data-table tr.row-top{background:#0891b21f}[data-theme=light] .table-empty{color:#64748b}[data-theme=light] .why-p{color:#334155}[data-theme=light] .why-formula{color:#0891b2;background:#0891b214;border-color:#0891b240}@media print{.action-bar,.tab-bar,.glass-navbar,.calc-back-to-top,.nav-toggle{display:none}.tab-content[hidden]{display:block}}