:root{--ink: #161612;--muted: #5d5a52;--line: #d9d5ca;--panel: rgba(255, 255, 252, .86);--panel-solid: #fffffc;--bg-top: #f1eee6;--bg-bottom: #f9f8f4;--focus: #13120f;--ok: #0e5c37;--bad: #9f2f1f;font-family:Avenir Next,IBM Plex Sans,Segoe UI,Helvetica Neue,sans-serif;color:var(--ink)}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:linear-gradient(180deg,var(--bg-top),var(--bg-bottom))}button,input{font:inherit}.app-shell{min-height:100dvh;position:relative}.library-screen,.editor-screen{animation:fade-in .18s ease-out}.library-screen{width:min(1080px,calc(100vw - 48px));margin:24px auto;display:flex;flex-direction:column;gap:16px}.library-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.library-head h1{margin:0;font-size:clamp(28px,4vw,42px);letter-spacing:-.03em;font-weight:620}.library-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.auth-pill{max-width:320px;border:1px solid #d8d2c4;background:#ffffffbf;border-radius:999px;padding:6px 10px;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.auth-pill.compact{max-width:220px}.dataset-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px}.dataset-card{border:1px solid var(--line);background:var(--panel);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border-radius:14px;padding:16px;text-align:left;color:inherit;cursor:pointer;display:flex;flex-direction:column;gap:8px;transition:transform .12s ease,border-color .12s ease,background-color .12s ease}.dataset-card:hover{transform:translateY(-1px);border-color:#bcb6a7;background:#fffef8}.dataset-name{font-size:18px;font-weight:550;letter-spacing:-.01em}.dataset-slug,.dataset-meta{font-size:13px;color:var(--muted)}.empty-state{min-height:300px;border:1px dashed 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solid var(--line);border-radius:12px;background:var(--panel-solid)}.csv-grid{width:100%;border-collapse:separate;border-spacing:0;table-layout:fixed}.csv-grid thead{position:relative}.csv-grid thead th{position:sticky;top:0;z-index:10;box-shadow:inset 0 -1px #dfdacb}.csv-grid th,.csv-grid td{border-right:1px solid #ece9de;border-bottom:1px solid #ece9de}.csv-grid th{position:sticky;top:0;z-index:10;background:#f6f3e9;color:#1d1b16;text-align:left;padding:0;font-size:12px;font-weight:560;letter-spacing:.01em;min-width:150px;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.row-index{width:56px;min-width:56px;max-width:56px;color:#8f887b;background:#faf8f1;position:sticky;left:0;z-index:11;padding:0;font-variant-numeric:tabular-nums;font-weight:390;border-right:1px solid #ddd7c7;-webkit-user-select:none;user-select:none}.row-index-head{background:#f7f4ea}.csv-grid td{background:#fff}.csv-grid td input{width:100%;border:0;background:transparent;color:var(--ink);padding:7px 10px;min-height:33px}.header-input{width:100%;border:0;background:transparent;color:#1d1b16;padding:8px 28px 8px 10px;font-size:12px;font-weight:560;letter-spacing:.01em}.header-input::placeholder{color:#888171}.header-input:focus{outline:0;box-shadow:inset 0 0 0 1px var(--focus);background:#fdfbf4}.header-cell{position:relative}.delete-col-btn,.delete-row-btn{width:18px;height:18px;border:0;border-radius:999px;background:transparent;color:#8d8371;font-size:15px;line-height:1;cursor:pointer;padding:0;opacity:0;transition:opacity .12s ease,background-color .12s ease,color .12s ease}.delete-col-btn{position:absolute;top:50%;right:6px;transform:translateY(-50%)}.header-cell:hover .delete-col-btn,.row-index-cell:hover 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