.main-container{max-width:1400px;margin:0 auto;padding:40px 20px}.page-title{font-family:var(--calc-font-headline);color:var(--calc-text-primary,#f8fafc);margin:0 0 .5rem;font-size:clamp(1.6rem,4vw,2.4rem)}.page-subtitle{color:var(--calc-text-faded);max-width:74ch;margin:0 0 1.5rem;line-height:1.5}.action-bar{flex-wrap:wrap;gap:.5rem;margin-bottom:1.25rem;display:flex}.action-btn{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-md);color:var(--calc-text-primary);cursor:pointer;padding:.5rem .9rem;font-size:.85rem;font-weight:600;transition:border-color .15s,background .15s}.action-btn:hover{border-color:var(--calc-cyan)}.action-btn--reset{margin-left:auto}.tab-bar{border-bottom:1px solid var(--calc-border-subtle);flex-wrap:wrap;gap:.4rem;margin-bottom:1.5rem;display:flex}.tab-btn{color:var(--calc-text-faded);font-family:var(--calc-font-headline);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;padding:.6rem .9rem;font-size:.95rem;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-panel[hidden]{display:none}.calc-grid{grid-template-columns:1fr 1fr;align-items:start;gap:1.25rem;display:grid}@media (width<=1024px){.calc-grid{grid-template-columns:1fr}}.input-card,.result-card,.viz-card{background:var(--calc-bg-card);border:1px solid var(--calc-border-default);border-radius:var(--calc-radius-lg);margin-bottom:1.25rem;padding:1.25rem 1.5rem}.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:.95rem}.form-group{flex-direction:column;gap:.4rem;margin-bottom:1rem;display:flex}.form-group label{color:var(--calc-text-faded);font-size:.85rem}.form-group input[type=text],.form-group select{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);width:100%;padding:.6rem .8rem;font-size:1.05rem;transition:border-color .15s}.form-group input:focus,.form-group select:focus{border-color:var(--calc-cyan);outline:none}.input-hint{color:var(--calc-text-dim);margin:-.4rem 0 1rem;font-size:.8rem;line-height:1.5}.result-value{font-family:var(--calc-font-mono);color:var(--calc-cyan);margin-bottom:.3rem;font-size:clamp(1.8rem,5vw,2.6rem);font-weight:700;line-height:1.1}.result-detail{color:var(--calc-text-faded);margin-bottom:1rem;line-height:1.5}.stat-grid{grid-template-columns:repeat(3,1fr);gap:.6rem;margin-bottom:.5rem;display:grid}@media (width<=480px){.stat-grid{grid-template-columns:1fr}}.stat-cell{background:var(--calc-bg-input);border:1px solid var(--calc-border-subtle);border-radius:var(--calc-radius-md);flex-direction:column;gap:.25rem;padding:.7rem .85rem;display:flex}.stat-label{font-family:var(--calc-font-mono);text-transform:uppercase;letter-spacing:.05em;color:var(--calc-text-dim);font-size:.68rem}.stat-value{font-family:var(--calc-font-mono);color:var(--calc-text-primary);font-size:1.05rem;font-weight:700}.scenario-block{border-top:1px solid var(--calc-border-default);margin:1.1rem 0 .5rem;padding-top:1rem}.scenario-block .card-title{margin-bottom:.75rem}.interpretation{color:var(--calc-text-faded);border-top:1px solid var(--calc-border-default);margin:.75rem 0 0;padding-top:.9rem;font-size:.88rem;line-height:1.6}.chart-wrap{height:220px;position:relative}.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-faded);padding:0 4px 14px;font-size:.85rem;line-height:1.75}@media (width<=768px){.action-btn{flex:calc(50% - .5rem);min-height:44px}.action-btn--reset{margin-left:0}.main-container{padding:24px 14px}.input-card,.result-card,.viz-card{padding:1rem}}[data-theme=light] .page-title{color:var(--calc-text-primary)}[data-theme=light] .input-card,[data-theme=light] .result-card,[data-theme=light] .viz-card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .action-btn{color:#0f172a;background:#fff;border-color:#0000001f}[data-theme=light] .action-btn:hover{background:#f0f4f9;border-color:#0891b2}[data-theme=light] .tab-bar{border-bottom-color:#0000001a}[data-theme=light] .tab-btn:not(.active){color:#64748b}[data-theme=light] .tab-btn:not(.active):hover{color:#0f172a}[data-theme=light] .form-group input[type=text],[data-theme=light] .form-group select{color:#0f172a;color-scheme:light;background:#f0f4f9;border-color:#00000026}[data-theme=light] .stat-cell{background:#edf2f9;border-color:#0000001a}[data-theme=light] .stat-value{color:#0f172a}[data-theme=light] .stat-label,[data-theme=light] .input-hint{color:#64748b}[data-theme=light] .result-detail,[data-theme=light] .interpretation{color:#475569}[data-theme=light] .scenario-block,[data-theme=light] .interpretation{border-top-color:#0000001a}[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:#0891b266 #0891b266 #0891b266 #0891b2;border-left-style:solid;border-left-width:3px}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[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;padding:12px 16px 16px}