:root{--bg: #f0f2ef;--ink: #14171a;--muted: #6d726b;--line: #d9dcd7;--panel: #ffffff;--accent: #1e7a56;--accent-soft: #e2f0e9;--accent-strong: #145c40;--error: #b23b2e;--font-display: "IBM Plex Sans", system-ui, sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, monospace}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-display);-webkit-font-smoothing:antialiased}.page{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:32px 20px;overflow:hidden}.grid-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(to right,var(--line) 1px,transparent 1px),linear-gradient(to bottom,var(--line) 1px,transparent 1px);background-size:44px 28px;-webkit-mask-image:radial-gradient(ellipse at center,black 0%,transparent 72%);mask-image:radial-gradient(ellipse at center,black 0%,transparent 72%);opacity:.5;pointer-events:none}.panel{position:relative;width:100%;max-width:480px;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:32px;box-shadow:0 1px 2px #14171a0a,0 12px 32px #14171a0f}.panel-head{margin-bottom:24px}.eyebrow{display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--accent-strong);background:var(--accent-soft);border-radius:4px;padding:3px 7px;margin-bottom:12px}.panel-head h1{margin:0 0 8px;font-size:26px;font-weight:700;letter-spacing:-.01em}.subtitle{margin:0;color:var(--muted);font-size:14px;line-height:1.5}.dropzone{margin-top:24px;border:1.5px dashed var(--line);border-radius:8px;padding:28px 16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center;cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.dropzone:hover{border-color:var(--accent)}.dropzone.dragging{border-color:var(--accent);background:var(--accent-soft)}.dropzone.has-file{border-style:solid;background:var(--accent-soft);border-color:var(--accent)}.drop-title{font-weight:600;font-size:15px}.drop-hint{color:var(--muted);font-size:13px}.file-name{font-family:var(--font-mono);font-weight:500;font-size:14px;word-break:break-all}.file-meta{color:var(--muted);font-size:13px}.error-text{color:var(--error);font-size:13px;margin:12px 0 0}.done-text{color:var(--accent-strong);font-size:13px;margin:14px 0 0;font-weight:500}.controls{margin-top:20px;display:flex;align-items:flex-end;justify-content:space-between;gap:16px}.field{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.field input[type=number]{font-family:var(--font-mono);font-size:15px;color:var(--ink);border:1px solid var(--line);border-radius:6px;padding:8px 10px;width:130px;background:var(--panel)}.field input[type=number]:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.plan{display:flex;flex-direction:column;align-items:flex-end;text-align:right}.plan-number{font-family:var(--font-mono);font-size:22px;font-weight:600;color:var(--accent-strong);line-height:1.1}.plan-label{font-size:12px;color:var(--muted)}.run-button{margin-top:20px;width:100%;border:none;border-radius:8px;background:var(--accent);color:#fff;font-family:var(--font-display);font-size:15px;font-weight:600;padding:13px 16px;cursor:pointer;transition:background-color .15s ease,transform .05s ease}.run-button:hover:not(:disabled){background:var(--accent-strong)}.run-button:active:not(:disabled){transform:translateY(1px)}.run-button:disabled{background:#c7cbc4;cursor:not-allowed}.run-button:focus-visible{outline:2px solid var(--accent-strong);outline-offset:2px}.cell-grid{margin-top:22px;display:grid;grid-template-columns:repeat(auto-fill,minmax(32px,1fr));gap:5px}.cell{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:4px;font-family:var(--font-mono);font-size:11px;color:var(--muted);background:var(--panel);transition:background-color .2s ease,border-color .2s ease,color .2s ease}.cell.done{background:var(--accent);border-color:var(--accent-strong);color:#fff}@media (prefers-reduced-motion: reduce){.dropzone,.run-button,.cell{transition:none}}@media (max-width: 420px){.panel{padding:24px 20px}.controls{flex-direction:column;align-items:stretch}.plan{align-items:flex-start;text-align:left}}