:root{--ink-900: #12262b;--ink-600: #3c5257;--paper-50: #f6faf9;--paper-100: #eef4f3;--nephron-700: #0b6e64;--nephron-600: #0f8378;--nephron-400: #3fa79b;--nephron-100: #dcf0ec;--amber-500: #c97a2b;--amber-100: #f7e6d3;--moss-500: #4f7d52;--moss-100: #e1ecdf;--line-200: #dce6e4;--line-100: #e9f0ee;--font-display: "Fraunces", ui-serif, Georgia, serif;--font-body: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;--radius-sm: 6px;--radius-md: 10px;--shadow-panel: 0 1px 2px rgba(18, 38, 43, .04), 0 8px 24px rgba(18, 38, 43, .06)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--paper-50);color:var(--ink-900);font-family:var(--font-body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}a{color:var(--nephron-700)}:focus-visible{outline:2px solid 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transparent;margin-bottom:-1px;transition:color .15s ease,border-color .15s ease}.mode-tab+.mode-tab{margin-left:22px}.mode-tab.active{color:var(--nephron-700);border-bottom-color:var(--nephron-700)}.mode-tab:hover{color:var(--nephron-700)}@media (max-width: 560px){.topbar-inner{flex-direction:column;align-items:flex-start;gap:10px;padding:14px 0}.mode-tab{font-size:11px}.mode-tab+.mode-tab{margin-left:14px}}.hero{padding:40px 0 28px;border-bottom:1px solid var(--line-200)}.hero h1{font-family:var(--font-display);font-weight:600;font-size:clamp(28px,4vw,40px);letter-spacing:-.015em;margin:0 0 10px;max-width:20ch}.hero p{max-width:62ch;color:var(--ink-600);margin:0 0 16px}.hero-disclosure{display:flex;gap:10px;align-items:flex-start;background:var(--amber-100);border:1px solid #e7c497;border-radius:var(--radius-sm);padding:12px 14px;font-size:13.5px;color:#6b4419;max-width:62ch}.hero-disclosure svg{flex:none;margin-top:2px}.main-grid{display:grid;grid-template-columns:1.35fr 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.unit{font-family:var(--font-mono);font-size:11px;color:var(--ink-600);font-weight:400}.field input[type=number],.field select{font-family:var(--font-mono);font-size:14px;padding:9px 10px;border:1px solid var(--line-200);border-radius:var(--radius-sm);background:var(--paper-100);color:var(--ink-900)}.field input[type=number]:focus,.field select:focus{background:#fff}.field .range-hint{font-family:var(--font-mono);font-size:11px;color:#94a3a1}.field.invalid input{border-color:var(--amber-500);background:var(--amber-100)}.field-error{font-size:11.5px;color:var(--amber-500)}.submit-row{display:flex;align-items:center;gap:14px;margin-top:8px}.btn-primary{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:var(--nephron-700);color:#fff;font-family:var(--font-body);font-weight:600;font-size:15px;padding:12px 22px;border-radius:var(--radius-sm);cursor:pointer;transition:background .15s ease,transform .1s ease}.btn-primary:hover{background:var(--nephron-600)}.btn-primary:disabled{background:#a9c3bf;cursor:not-allowed}.btn-secondary{-webkit-appearance:none;-moz-appearance:none;appearance:none;background:transparent;border:1px solid var(--line-200);color:var(--ink-600);font-family:var(--font-body);font-size:14px;padding:11px 16px;border-radius:var(--radius-sm);cursor:pointer}.submit-hint{font-size:12.5px;color:var(--ink-600)}.result-panel{position:sticky;top:92px;background:#fff;border:1px solid var(--line-200);border-radius:var(--radius-md);box-shadow:var(--shadow-panel);padding:24px}.result-panel h2{font-family:var(--font-display);font-size:19px;font-weight:600;margin:0 0 4px}.result-sub{font-size:13px;color:var(--ink-600);margin:0 0 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strong{color:var(--ink-900)}.model-name{font-family:var(--font-mono);font-size:11px;color:var(--nephron-700);margin-top:10px}.error-banner{background:#fbe1d3;border:1px solid #e7ab86;color:#7a3413;border-radius:var(--radius-sm);padding:10px 14px;font-size:13.5px;margin-bottom:16px}footer.site-footer{border-top:1px solid var(--line-200);padding:24px 0 40px;font-size:12.5px;color:var(--ink-600)}