:root{--bg: #0a0a0f;--surface: #12121a;--surface-2: #1a1a25;--border: #2a2a3a;--text: #e8e8ef;--text-2: #8888a0;--accent: #6c5ce7;--accent-light: #a29bfe;--green: #00b894;--red: #ff6b6b;--yellow: #ffd93d;--radius: 12px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--mono: "SF Mono", "Cascadia Code", "Fira Code", monospace}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;padding:2rem;max-width:1200px;margin:0 auto}header{text-align:center;margin-bottom:2rem}header h1{font-size:2rem;font-weight:700}.subtitle{color:var(--text-2);margin-top:.5rem}.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:3rem 2rem;text-align:center;cursor:pointer;transition:border-color .2s,background .2s}.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:#6c5ce70d}.dropzone-icon{font-size:3rem;display:block;margin-bottom:1rem}.dropzone-hint{color:var(--text-2);font-size:.85rem;margin-top:.5rem}.file-label{color:var(--accent-light);cursor:pointer;text-decoration:underline}.loading{text-align:center;padding:3rem}.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 1rem}@keyframes spin{to{transform:rotate(360deg)}}.hidden{display:none!important}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-bottom:1.5rem}.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin-top:1rem}.stat-box{background:var(--surface-2);border-radius:8px;padding:1rem;text-align:center}.stat-value{font-size:1.5rem;font-weight:700;font-family:var(--mono);color:var(--accent-light)}.stat-label{font-size:.8rem;color:var(--text-2);margin-top:.25rem}.columns-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:1rem}.col-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:1.25rem}.col-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.col-name{font-weight:600;font-family:var(--mono);font-size:.95rem}.col-type{font-size:.75rem;padding:2px 8px;border-radius:4px;background:var(--surface-2);color:var(--text-2);font-family:var(--mono)}.col-stats{display:grid;grid-template-columns:1fr 1fr;gap:.4rem 1rem;font-size:.85rem}.col-stats dt{color:var(--text-2)}.col-stats dd{font-family:var(--mono);text-align:right}.null-bar{height:4px;background:var(--surface-2);border-radius:2px;margin-top:.75rem;overflow:hidden}.null-bar-fill{height:100%;border-radius:2px;transition:width .3s}.null-bar-fill.low{background:var(--green)}.null-bar-fill.mid{background:var(--yellow)}.null-bar-fill.high{background:var(--red)}.top-values{margin-top:.75rem;font-size:.8rem}.top-values summary{color:var(--text-2);cursor:pointer;-webkit-user-select:none;user-select:none}.top-values-list{margin-top:.5rem;display:flex;flex-wrap:wrap;gap:.35rem}.top-val{background:var(--surface-2);padding:2px 8px;border-radius:4px;font-family:var(--mono);font-size:.75rem}.top-val-count{color:var(--text-2);margin-left:4px}.export-bar{display:flex;gap:.5rem;margin-top:1rem;flex-wrap:wrap}.export-btn{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:.4rem 1rem;border-radius:6px;cursor:pointer;font-size:.85rem;transition:background .2s}.export-btn:hover{background:var(--accent);color:#fff}footer{text-align:center;margin-top:3rem;padding-top:1.5rem;border-top:1px solid var(--border);color:var(--text-2);font-size:.85rem}footer a{color:var(--accent-light);text-decoration:none}footer a:hover{text-decoration:underline}