:root{--primary: #009688;--primary-dark: #00796b;--bg: #f5f5f5;--surface: #ffffff;--border: #e0e0e0;--text: #212121;--muted: #757575;--error-bg: #ffebee;--error-fg: #c62828}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);font-size:14px}.app{max-width:1600px;margin:0 auto;padding:0 2rem 3rem;display:flex;flex-direction:column;gap:1.5rem}.app-footer{text-align:center;padding:1rem 0 0;color:var(--muted);font-size:.72rem;letter-spacing:.02em}header{display:flex;align-items:center;justify-content:space-between;padding:1.2rem 0 1rem;border-bottom:2px solid var(--primary)}h1{font-size:1.3rem;font-weight:700;color:var(--primary);letter-spacing:-.01em}h2{font-size:1rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin-bottom:1.25rem}.model-selector{display:flex;gap:.4rem}.card{background:var(--surface);border-radius:8px;padding:1.5rem;box-shadow:0 1px 4px #00000014}button{padding:.45rem 1rem;border:1px solid var(--primary);background:var(--surface);color:var(--primary);border-radius:4px;cursor:pointer;font-size:.875rem;font-weight:500;transition:background .15s,color .15s;white-space:nowrap}button:hover:not(:disabled){background:var(--primary);color:#fff}button.active,button.btn-primary{background:var(--primary);color:#fff}button.btn-primary:hover:not(:disabled){background:var(--primary-dark)}button:disabled{opacity:.45;cursor:not-allowed}.controls{display:grid;grid-template-columns:1fr 1fr 1fr auto;align-items:flex-end;gap:1rem;margin-bottom:1.5rem}.param-input{display:flex;flex-direction:column;gap:.35rem}.param-header{display:flex;justify-content:space-between;align-items:baseline;gap:.5rem}.param-label{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.param-text{width:90px;padding:.2rem .4rem;border:1px solid var(--border);border-radius:3px;font-size:.82rem;color:var(--text);text-align:right;font-variant-numeric:tabular-nums}.param-text:focus{outline:2px solid var(--primary);border-color:transparent}input[type=range]{width:100%;accent-color:var(--primary);cursor:pointer}.step-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--primary);margin-bottom:.75rem}.alpha-row{margin-bottom:1rem}.point-table{border-collapse:collapse;margin:.75rem auto 0}.point-table th{background:var(--primary);color:#fff;padding:.45rem 1.5rem;font-size:.8rem;font-weight:600;text-align:center}.point-table td{padding:.55rem 1.5rem;text-align:center;font-size:.95rem;font-variant-numeric:tabular-nums;border:1px solid var(--border)}.chart-container{position:relative;height:440px;max-width:900px;margin:0 auto}.plots-stack{display:flex;flex-direction:column;gap:2.5rem}.plot-label{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:1rem}.pvr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;justify-items:stretch}.pvr-cell{height:380px;min-width:0}.surfaces-row{display:flex;gap:1rem;flex-wrap:wrap;align-items:flex-start;justify-content:center}.surface-wrap{display:flex;flex-direction:column;align-items:center;gap:.25rem}.surface-title{font-size:.75rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}.surface-canvas{display:block}.colorbar-outer{display:flex;flex-direction:column;align-items:flex-start;gap:.3rem}.colorbar-inner{display:flex;gap:4px;align-items:stretch}.colorbar-ticks{display:flex;flex-direction:column;justify-content:space-between;font-size:9px;color:#444;padding:0;line-height:1}.colorbar-label{font-size:11px;color:#555;font-style:italic;align-self:center}.placeholder{padding:3rem 2rem;text-align:center;color:var(--muted);border:1px dashed var(--border);border-radius:6px;display:flex;flex-direction:column;align-items:center;gap:.6rem}.spinner{display:inline-block;width:28px;height:28px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}.spinner-inline{width:14px;height:14px;border-width:2px;vertical-align:middle;margin-right:.4rem}@keyframes spin{to{transform:rotate(360deg)}}.error{padding:.85rem 1rem;color:var(--error-fg);background:var(--error-bg);border-radius:4px;font-size:.875rem}.metrics-scroll{overflow-x:auto}.metrics-table{width:100%;border-collapse:collapse;white-space:nowrap}.metrics-table th{background:var(--primary);color:#fff;padding:.5rem .75rem;text-align:center;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em}.metrics-table th.th-group{border-left:2px solid rgba(255,255,255,.3);border-right:2px solid rgba(255,255,255,.3)}.metrics-table td{padding:.55rem .75rem;border-bottom:1px solid var(--border);font-size:.85rem;text-align:center}.metrics-table td.td-target{text-align:left;font-weight:600}.metrics-table tr:last-child td{border-bottom:none}.metrics-table tbody tr:hover td{background:#e0f2f1}