:root{--bg: #0b0d12;--panel: #11151c;--card: #161b22;--border: #262d38;--border-soft: #1d232c;--text: #e6edf3;--muted: #8b949e;--muted-2: #6e7681;--accent: #2f81f7;--accent-hover: #1f6feb}*{box-sizing:border-box}html,body,#root{margin:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;background:var(--bg);color:var(--text)}.layout{display:grid;grid-template-columns:240px 1fr;height:100vh}.sidebar{background:var(--panel);border-right:1px solid var(--border-soft);display:flex;flex-direction:column;padding:1rem .75rem}.brand{display:flex;align-items:center;gap:.6rem;padding:.5rem .75rem 1.25rem;font-weight:600;font-size:1.05rem;letter-spacing:-.01em}.brand-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}.nav{display:flex;flex-direction:column;gap:2px;flex:1}.nav-item{display:flex;align-items:center;gap:.7rem;padding:.55rem .75rem;background:transparent;border:none;color:var(--muted);font:inherit;text-align:left;border-radius:6px;cursor:pointer;transition:background .12s,color .12s}.nav-item:hover{background:#ffffff08;color:var(--text)}.nav-item.active{background:#2f81f71f;color:var(--text)}.nav-icon{font-size:1rem;width:1.25rem;text-align:center}.nav-label{font-size:.92rem}.sidebar-footer{padding:.75rem;font-size:.75rem;color:var(--muted-2);border-top:1px solid var(--border-soft);margin-top:.5rem}.content{overflow-y:auto}.empty{display:grid;place-items:center;height:100%;color:var(--muted)}.app-page{max-width:720px;margin:0 auto;padding:3rem 2rem}.app-header h1{font-size:1.75rem;margin:0 0 .4rem;letter-spacing:-.02em}.subtitle{color:var(--muted);margin:0 0 2rem}textarea{width:100%;background:var(--card);color:var(--text);border:1px solid var(--border);border-radius:8px;padding:.875rem 1rem;font-family:inherit;font-size:1rem;resize:vertical;min-height:140px}textarea:focus{outline:none;border-color:var(--accent)}button{margin-top:1rem;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:.625rem 1.25rem;font-size:.95rem;font-weight:600;cursor:pointer;transition:background .15s}button:hover:not(:disabled){background:var(--accent-hover)}button:disabled{opacity:.5;cursor:not-allowed}.error{margin-top:1rem;padding:.75rem 1rem;background:#f851491a;border:1px solid rgba(248,81,73,.4);border-radius:8px;color:#ff7b72}.result{margin-top:2rem;padding:1.25rem 1.5rem;background:var(--card);border:1px solid var(--border);border-radius:8px}.result h2{margin:0 0 .75rem;font-size:1rem;color:var(--muted);font-weight:500}.result pre{margin:0;white-space:pre-wrap;word-break:break-word;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.95rem}@media (max-width: 720px){.layout{grid-template-columns:1fr;grid-template-rows:auto 1fr}.sidebar{flex-direction:row;align-items:center;padding:.5rem .75rem;border-right:none;border-bottom:1px solid var(--border-soft)}.brand{padding:0;margin-right:1rem}.nav{flex-direction:row;flex:1}.sidebar-footer,.nav-label{display:none}}