:root{--bg: #0b0f14;--panel: #10151c;--border: #1f2937;--text: #d1d9e0;--muted: #64748b;--accent: #4ade80;--danger: #f87171}*{box-sizing:border-box}html,body{margin:0;min-height:100vh}body{background:var(--bg);color:var(--text);font-family:ui-monospace,JetBrains Mono,Fira Code,Cascadia Code,Menlo,Consolas,monospace;font-size:14px;line-height:1.5}.muted{color:var(--muted)}.error{color:var(--danger)}.panel{background:var(--panel);border:1px solid var(--border);padding:1rem 1.25rem}.panel-title{margin:0 0 1rem;font-size:.85rem;font-weight:400;color:var(--muted);letter-spacing:.05em}input,select,button{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);padding:.4rem .6rem;outline:none}input:focus,select:focus{border-color:var(--accent)}input::placeholder{color:var(--muted);opacity:.6}button{color:var(--accent);border-color:var(--accent);background:transparent;cursor:pointer}button:hover:not(:disabled){background:#4ade801a}button:disabled{opacity:.5;cursor:default}