:root{--bg-dark: #1a1a1a;--bg-panel: #242424;--text-primary: #ffffff;--text-secondary: #a0a0a0;--accent: #646cff;--accent-hover: #535bf2;--danger: #ff4444;--border: #333}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-dark);color:var(--text-primary);height:100vh;overflow:hidden}#app{display:grid;grid-template-columns:300px 1fr;height:100vh}.sidebar{background-color:var(--bg-panel);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:1rem;gap:1rem;overflow:hidden}.sidebar-header h1{margin:0 0 1rem;font-size:1.5rem;color:var(--accent)}.file-list-container{flex:1;min-height:0;overflow-y:auto;border:1px solid var(--border);border-radius:4px;padding:.5rem}.file-list-container h3{margin-top:0;font-size:.9rem;color:var(--text-secondary)}#file-list{list-style:none;padding:0;margin:0}#file-list li{padding:.5rem;cursor:pointer;border-radius:4px;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#file-list li:hover{background-color:#ffffff1a}#file-list li.active{background-color:var(--accent);color:#fff}.main-content{display:flex;flex-direction:column;height:100vh}.toolbar{padding:1rem;background-color:var(--bg-panel);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.image-workspace{flex:1;background-color:#1a1a1a;display:flex;justify-content:center;align-items:center;padding:20px;overflow:hidden;position:relative}#display-image{max-width:100%;max-height:100%;object-fit:contain;cursor:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="M12 2 V22 M2 12 H22" stroke="%230044aa" stroke-width="2" fill="none" stroke-linecap="round"/></svg>') 12 12,crosshair}#marker-canvas{position:absolute;pointer-events:none}.analysis-panel{height:200px;background-color:var(--bg-panel);border-top:1px solid var(--border);padding:1rem;display:none}.analysis-panel.show{display:block}.btn{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-weight:500;transition:background-color .2s}.btn.primary{background-color:var(--accent);color:#fff;width:100%}.btn.primary:hover{background-color:var(--accent-hover)}.btn.secondary{background-color:transparent;border:1px solid var(--accent);color:var(--accent);width:100%}.btn.secondary:hover{background-color:#646cff1a}.btn.icon{background-color:#333;color:#fff}.badge{background-color:var(--danger);padding:.25rem .5rem;border-radius:12px;font-size:.8rem;font-weight:700}.stats-panel{display:flex;flex-direction:column;gap:.5rem;padding-top:1rem;border-top:1px solid var(--border);flex-shrink:0}.stat-item{display:flex;justify-content:space-between;font-size:.9rem}.modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background-color:#000c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .2s ease-in-out}.modal.show{display:flex;justify-content:center;align-items:center}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background-color:var(--bg-panel);border:1px solid var(--border);border-radius:8px;width:90%;max-width:800px;max-height:90vh;overflow-y:auto;animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(50px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border);background:linear-gradient(135deg,#646cff1a,#646cff0d)}.modal-header h2{margin:0;color:var(--accent);font-size:1.5rem}.btn-close{background:transparent;border:none;color:var(--text-secondary);font-size:2rem;cursor:pointer;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:4px;transition:all .2s}.btn-close:hover{background-color:#ffffff1a;color:var(--text-primary)}.modal-body{padding:1.5rem}.modal-footer{margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border);display:flex;justify-content:flex-end}.analysis-section{margin-bottom:2rem;padding:1rem;border:1px solid var(--border);border-radius:6px;background-color:#ffffff05}.analysis-section h3{margin-top:0;color:var(--accent);font-size:1.2rem;margin-bottom:1rem}.help-text{color:var(--text-secondary);font-size:.9rem;margin:.5rem 0}.calibration-controls{display:flex;gap:1rem;align-items:center;flex-wrap:wrap}.file-input{display:none}.file-input+label{cursor:pointer;display:inline-block}.input-group{display:flex;align-items:center;gap:.5rem}.input-group label{font-size:.9rem;color:var(--text-secondary);white-space:nowrap}.input-group input{background-color:var(--bg-dark);border:1px solid var(--border);border-radius:4px;padding:.5rem;color:var(--text-primary);font-size:.9rem;width:100px}.input-group input:focus{outline:none;border-color:var(--accent)}.input-group span{color:var(--text-secondary);font-size:.9rem}.canvas-container{margin-top:1rem;border:1px solid var(--border);border-radius:4px;overflow:hidden;background-color:var(--bg-dark)}#ruler-canvas{display:block;max-width:100%;cursor:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="M12 2 V22 M2 12 H22" stroke="%230044aa" stroke-width="2" fill="none" stroke-linecap="round"/></svg>') 12 12,crosshair}.result-box{margin-top:1rem;padding:1rem;background-color:#646cff1a;border:1px solid var(--accent);border-radius:4px;color:var(--text-primary)}.params-grid{margin-bottom:1.5rem}.result-card{background:linear-gradient(135deg,#646cff1a,#646cff0d);border:1px solid var(--border);border-radius:6px;padding:1rem;text-align:center;transition:transform .2s}.result-card:hover{transform:translateY(-2px)}.result-card.highlight{background:linear-gradient(135deg,#ff638433,#ff63841a);border-color:#ff6384}.result-label{font-size:.85rem;color:var(--text-secondary);margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.5px}.result-value{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin-bottom:.25rem}.result-unit{font-size:.8rem;color:var(--text-secondary)}.safety-alert{padding:1rem;border-radius:6px;border-left:4px solid;margin-bottom:1rem;transition:all .3s}.safety-alert strong{display:block;margin-bottom:.5rem;font-size:1.1rem}.safety-alert p{margin:0;color:var(--text-secondary)}.image-overlay-instructions{position:absolute;top:20px;right:20px;background-color:#000000b3;padding:15px;border-radius:8px;pointer-events:none;z-index:10;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,.1);box-shadow:0 4px 6px #0000004d}.image-overlay-instructions p{margin:5px 0;font-size:.9rem;color:#ffffffe6;display:flex;align-items:center;gap:8px;text-shadow:0 1px 2px rgba(0,0,0,.5)}.image-overlay-instructions strong{color:#fff;font-weight:600}