:root{--color-canvas:#f3f6fa;--color-surface:#fff;--color-surface-subtle:#f7f9fc;--color-text:#172033;--color-text-muted:#41536d;--color-border:#c6d0de;--color-border-strong:#9aa9bd;--color-accent:#135e92;--color-accent-hover:#0f4f7c;--color-accent-soft:#e8f1f7;--color-focus:#d26700;--color-danger:#b3261e;--color-danger-soft:#fff5f4;--color-complete:#287a48;--color-complete-soft:#eaf7ee;--radius-sm:.375rem;--radius-md:.75rem;--shadow-panel:0 1px 2px #17203314, 0 8px 24px #1720330f;color:var(--color-text);background:var(--color-canvas);font-synthesis:none;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{background:var(--color-canvas);min-width:320px;margin:0}button{border-radius:var(--radius-sm);background:var(--color-accent);color:#fff;min-height:44px;font:inherit;cursor:pointer;border:1px solid #0000;padding:.75rem 1rem;font-weight:700}button:hover{background:var(--color-accent-hover)}button:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px}.app-shell{place-items:start center;gap:1.5rem;min-height:100vh;padding:1.5rem 1rem;display:grid}.app-header,.app-main,.app-footer{gap:1rem;width:min(100%,42rem);line-height:1.5;display:grid}.app-main{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-panel);padding:clamp(1rem,4vw,2rem)}.screen,.screen form{gap:1.25rem;display:grid}.screen>h2{margin:0;font-size:clamp(1.4rem,5vw,1.75rem);line-height:1.2}.app-header nav{gap:.625rem;display:grid}.progress-summary{flex-wrap:wrap;align-items:baseline;gap:.375rem;display:flex}.progress-position{color:var(--color-text-muted);font-size:.875rem}.progress-meter{background:var(--color-border);border:0;border-radius:999px;width:100%;height:.5rem;display:none;overflow:hidden}.progress-meter::-webkit-progress-bar{background:var(--color-border)}.progress-meter::-webkit-progress-value{background:var(--color-accent)}.progress-meter::-moz-progress-bar{background:var(--color-accent)}.progress-steps{scroll-snap-type:x proximity;scrollbar-width:thin;grid-template-columns:repeat(7,minmax(5.25rem,1fr));margin:0;padding:.1875rem 0 .5rem;list-style:none;display:grid;overflow-x:auto}.progress-steps li{scroll-snap-align:center;flex-direction:column;justify-content:center;align-items:center;gap:.375rem;min-width:0;display:flex;position:relative}.progress-steps li:not(:last-child):after{z-index:0;border-top:2px solid var(--color-border);content:"";position:absolute;top:.875rem;left:calc(50% + .875rem);right:calc(.875rem - 50%)}.progress-steps li.is-complete:after{border-color:#7faecd}.progress-marker{z-index:1;width:1.75rem;height:1.75rem;color:var(--color-text-muted);background:#f5f7fa;border:2px solid #aebaca;border-radius:50%;place-items:center;font-size:.75rem;font-weight:700;line-height:1;display:grid;position:relative}.progress-steps li.is-complete .progress-marker{background:var(--color-accent-soft);color:var(--color-accent);border-color:#7faecd}.progress-steps li[aria-current=step] .progress-marker{border-color:var(--color-accent);background:var(--color-accent);color:#fff;box-shadow:0 0 0 3px #cce3f2}.progress-label{width:100%;color:var(--color-text-muted);text-align:center;padding:0 .25rem;font-size:.6875rem;line-height:1.25}.progress-steps li[aria-current=step] .progress-label{color:var(--color-text);font-weight:700}fieldset{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-subtle);gap:.75rem;margin:0;padding:1rem;display:grid}legend{padding:0 .375rem;font-weight:700}.field-row{flex-wrap:wrap;gap:1rem;display:flex}.field{gap:.25rem;display:grid}label{font-weight:600}.field-help,.disclaimer{color:var(--color-text-muted)}input[type=text]{border:1px solid var(--color-border-strong);border-radius:var(--radius-sm);background:var(--color-surface);min-height:44px;color:var(--color-text);font:inherit;padding:.5rem .75rem}input[aria-invalid=true]{border-color:var(--color-danger)}.measurement-field{grid-template-columns:minmax(0,1fr);align-content:start;gap:.25rem;min-width:0;display:grid}.measurement-row{align-items:start;gap:1rem;display:grid}.measurement-row--three{grid-template-columns:repeat(3,minmax(0,1fr))}.measurement-row--two{grid-template-columns:repeat(2,minmax(0,1fr))}.measurement-row--one{grid-template-columns:minmax(0,16rem)}.field-line{align-items:center;gap:.5rem;min-width:0;display:flex}.field-line input{flex:auto;min-width:0;max-width:10rem}.unit{flex:none}.measurement-group>.field-help{margin:0}@media (width<=34rem){.progress-meter{display:block}.progress-steps{display:none}.measurement-row--three,.measurement-row--two,.measurement-row--one{grid-template-columns:minmax(0,1fr)}.measurement-row .field-line input{max-width:none}}.error-summary{border:2px solid var(--color-danger);border-radius:var(--radius-sm);background:var(--color-danger-soft);gap:.5rem;padding:1rem;display:grid}.error-summary h3{margin:0;font-size:1rem}.error-summary ul{margin:0;padding-left:1.25rem}.field-error{color:var(--color-danger)}.choice-field{gap:.625rem}.choice{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);cursor:pointer;align-items:center;gap:.75rem;min-height:48px;padding:.625rem .75rem;display:flex}.choice:hover{border-color:var(--color-border-strong);background:var(--color-accent-soft)}.choice:focus-within{outline:3px solid var(--color-focus);outline-offset:2px}.choice input:focus-visible{outline:0}.choice.is-selected{border-color:var(--color-accent);background:var(--color-accent-soft);box-shadow:inset 3px 0 0 var(--color-accent)}.choice input[type=radio]{width:1.125rem;height:1.125rem;accent-color:var(--color-accent);flex:none;margin:0}.choice-field.is-complete{background:var(--color-complete-soft);border-color:var(--color-complete)}.button-row,.screen-navigation__inner{flex-wrap:wrap;gap:1rem;display:flex}button.secondary{border-color:var(--color-border);background:var(--color-accent-soft);color:var(--color-text)}button.secondary:hover{background:#dce8f1}.actions{flex-wrap:wrap;gap:1rem;display:flex}.copy-status{font-weight:700}.result-summary{border:1px solid var(--color-border);border-left:4px solid var(--color-accent);border-radius:var(--radius-md);background:var(--color-accent-soft);gap:.5rem;padding:1rem;display:grid}.global-result{font-size:clamp(1.25rem,5vw,1.5rem);font-weight:700}.region-result{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface-subtle);gap:.625rem;padding:1rem;display:grid}.region-result h3{margin:0;font-size:1.05rem}.trace-row{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface)}.trace-row summary{cursor:pointer;align-items:center;min-height:44px;padding:.625rem .75rem;font-weight:600;display:flex}.trace-row dl{padding:0 .75rem .75rem}.trace-row dt{color:var(--color-text-muted);font-weight:600}.trace-row dd{margin:0}.result-primary-actions>button,.result-edit-actions>button{flex:12rem}.result-edit-actions{border-top:1px solid var(--color-border);padding-top:1rem}.pwa-status{border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-accent-soft);flex-wrap:wrap;align-items:center;gap:.75rem;padding:.75rem 1rem;display:flex}.pwa-status p{font-weight:600}@media print{:root{color:#000;background:#fff}.app-shell{padding:0}.app-main{box-shadow:none;background:#fff;border:0;padding:0}.app-header nav,.actions,.copy-status,.screen-navigation,.screen-navigation__inner{display:none}.region-result{break-inside:avoid}.result-summary,.region-result{border-left:1px solid var(--color-border);box-shadow:none;background:#fff}.trace-row,.trace-row dl{display:block}.trace-row{border:0;padding:0}.disclaimer,.protocol-label{color:#000}}h1,p{margin:0}h1{font-size:clamp(1.75rem,7vw,2.5rem);line-height:1.15}.protocol-label,.app-built{color:var(--color-text-muted)}.protocol-label{font-weight:700}.app-built{font-size:.875rem}@media (width>=48rem){.app-shell{padding:4rem 2rem}}