:root{--bg: #12141a;--panel: #1b1f2a;--text: #e8e6e3;--muted: #9aa3b2;--accent: #3d9cf0;--line: #2a3140;--mono: "IBM Plex Mono", "SF Mono", ui-monospace, monospace;--sans: "IBM Plex Sans", "Segoe UI", sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;font-family:var(--sans);color:var(--text);background:radial-gradient(1200px 600px at 10% -10%,#1e3a5f 0%,transparent 55%),radial-gradient(900px 500px at 100% 0%,#2a1f3d 0%,transparent 50%),var(--bg)}.layout{max-width:920px;margin:0 auto;padding:2rem 1.25rem 4rem}header h1{margin:0 0 .4rem;font-weight:650;letter-spacing:-.02em}header p{margin:0 0 1.5rem;color:var(--muted);line-height:1.5}.panel{background:color-mix(in srgb,var(--panel) 92%,black);border:1px solid var(--line);border-radius:10px;padding:1rem 1.1rem 1.15rem;margin-bottom:1rem}.panel h2{margin:0 0 .65rem;font-size:1.05rem}.panel p,.panel label{color:var(--muted);font-size:.92rem}label{display:inline-flex;align-items:center;gap:.4rem;margin-right:.75rem}input[type=number]{width:6rem;background:#0e1117;border:1px solid var(--line);color:var(--text);border-radius:6px;padding:.25rem .4rem}input[type=file]{color:var(--muted)}button{background:var(--accent);color:#041018;border:0;border-radius:6px;padding:.45rem .8rem;font-weight:600;cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}.log{margin:.75rem 0 0;padding:.75rem;background:#0b0d12;border:1px solid var(--line);border-radius:8px;font-family:var(--mono);font-size:.78rem;line-height:1.45;white-space:pre-wrap;word-break:break-word;max-height:22rem;overflow:auto}code{font-family:var(--mono);font-size:.9em}