:root{--bg:#0b1020;--panel:#111a33;--text:#e7e9ee;--muted:#aab2c5;--border:rgba(255,255,255,.1)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}.container{max-width:1100px;margin:0 auto;padding:24px}.header{margin-bottom:16px}h1{margin:0 0 6px}.muted{color:var(--muted)}.card{background:#ffffff08;border:1px solid var(--border);border-radius:16px;padding:16px}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.row--between{justify-content:space-between}.btn{padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:#ffffff0f;color:var(--text);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.btn:disabled{opacity:.55;cursor:not-allowed}.btn--ghost{background:transparent}.footer{margin-top:16px}.divider{display:flex;align-items:center;gap:12px;margin:16px 0;color:var(--muted);font-size:13px}.divider:before,.divider:after{content:"";flex:1;height:1px;background:var(--border)}.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace}.label{font-size:12px;color:var(--muted);margin-bottom:4px}.stack{display:grid;gap:12px}.input{padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:#ffffff0a;color:var(--text)}.input:focus{outline:1px solid rgba(147,197,253,.5);border-color:#93c5fd80}.output{margin-top:14px;white-space:pre-wrap;background:#00000059;border:1px solid var(--border);border-radius:12px;padding:12px}.output--error{border-color:#ff646459}code{background:#ffffff0f;padding:2px 6px;border-radius:8px;border:1px solid var(--border)}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.panel-title{font-size:14px;color:var(--muted);margin-bottom:6px}.panel-count{font-size:28px;font-weight:700;margin-bottom:12px}.list{display:grid;gap:10px}.list-item{border:1px solid var(--border);border-radius:12px;padding:10px;background:#ffffff05}.item-title{font-weight:600}.small{font-size:12px}@media (max-width: 900px){.grid-3{grid-template-columns:1fr}}