.main-container{max-width:1400px;margin:0 auto;padding:40px 20px}.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:.04em;color:var(--calc-text-faded);margin:0 0 1rem;font-size:.95rem;font-weight:700}[data-theme=light] .card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}.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,.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);padding:.6rem .8rem;font-size:1.02rem}.form-group input:focus,.form-group select:focus{border-color:var(--calc-cyan);outline:none}[data-theme=light] .form-group input,[data-theme=light] .form-group select{background:#f0f4f9;border-color:#00000026}.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}.calc-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:start;gap:24px;display:grid}@media (width<=1024px){.calc-grid{grid-template-columns:1fr}}.field-hint{color:var(--calc-text-dim);margin:6px 0 0;font-size:.78rem;line-height:1.5}.card-title+.field-hint{margin:-4px 0 14px}.input-divider{border:none;border-top:1px solid var(--calc-border-default);margin:16px 0}.alert-widen{border-radius:var(--calc-radius-md);color:var(--calc-amber,#f59e0b);background:#f59e0b1a;border:1px solid #f59e0b59;margin-top:14px;padding:10px 14px;font-size:.85rem;line-height:1.5}[data-theme=light] .alert-widen{color:#78350f;background:#fffbeb;border-color:#d9770659}.alternates-wrap{margin-top:4px}.preset-summary{margin-bottom:16px}.preset-summary p{color:var(--calc-text-primary);font-family:var(--calc-font-mono);margin:0;font-size:.95rem}.preset-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}@media (width<=768px){.preset-grid{grid-template-columns:1fr}}[data-theme=light] .alternates-wrap .data-table th{color:#0f172a;background:#f0f4f9}