:root{--bg: #0f172a;--card: #0b1220;--muted: #94a3b8;--accent: #60a5fa}body{font-family:Inter,ui-sans-serif,system-ui;background:linear-gradient(180deg,#071028,#071938);color:#e6eef8;margin:0;min-height:100vh}.container{max-width:760px;margin:48px auto;padding:24px;background:#ffffff05;border-radius:12px;box-shadow:0 6px 30px #02061799}h1{margin:0 0 16px}.controls{margin-bottom:16px}.btn{background:var(--accent);border:none;padding:10px 16px;border-radius:8px;color:#012;cursor:pointer;font-weight:600}.btn:disabled{opacity:.6;cursor:default}.log{background:#ffffff05;padding:12px;border-radius:8px;min-height:160px}.log-line{font-family:monospace;font-size:13px;color:var(--muted);padding:4px 0}.hint{color:var(--muted)}.footer{margin-top:12px;font-size:13px;color:var(--muted)}