*{box-sizing:border-box;margin:0;padding:0}:root{--primary: #2563eb;--primary-hover: #1d4ed8;--success: #16a34a;--error: #dc2626;--bg: #f8fafc;--card-bg: #ffffff;--border: #e2e8f0;--text: #1e293b;--text-muted: #64748b;--code-bg: #1e293b;--code-text: #e2e8f0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}.container{max-width:900px;margin:0 auto;padding:2rem 1rem}header{text-align:center;margin-bottom:2rem}header h1{font-size:2rem;font-weight:700;color:var(--text)}header .subtitle{color:var(--text-muted);font-size:1.1rem}.card{background:var(--card-bg);border-radius:12px;padding:1.5rem;margin-bottom:1.5rem;box-shadow:0 1px 3px #0000001a;border:1px solid var(--border)}.card h2{font-size:1.25rem;margin-bottom:1rem;color:var(--text)}.card h3{font-size:1rem;margin:1rem 0 .5rem;color:var(--text-muted)}.hidden{display:none!important}.input-group{margin-bottom:1rem}.input-group label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.25rem;color:var(--text-muted)}.input-group input{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:8px;font-size:1rem;transition:border-color .2s}.input-group input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.input-group.inline{display:flex;align-items:center;gap:.5rem;margin-bottom:.75rem}.input-group.inline label{margin-bottom:0;min-width:100px}.input-group.inline input{flex:1;max-width:200px}.divider{text-align:center;color:var(--text-muted);margin:1.5rem 0;position:relative}.divider:before,.divider:after{content:"";position:absolute;top:50%;width:40%;height:1px;background:var(--border)}.divider:before{left:0}.divider:after{right:0}.btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:.9rem;font-weight:500;cursor:pointer;transition:all .2s;background:var(--bg);color:var(--text);border:1px solid var(--border)}.btn:hover{background:var(--border)}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{background:transparent;color:var(--primary);border-color:var(--primary)}.btn-secondary:hover{background:#2563eb1a}.btn-toggle{background:var(--bg);color:var(--text-muted);border:1px solid var(--border)}.btn-toggle.active{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-toggle:hover:not(.active){background:var(--border)}.mode-toggle{display:flex;gap:.5rem;margin-bottom:1rem}.btn-group{display:flex;flex-wrap:wrap;gap:.5rem}.status-indicator{font-size:1.1rem;font-weight:500;margin-bottom:.5rem}.status-indicator .success{color:var(--success)}.status-indicator .success:before{content:"✓"}.status-indicator .error{color:var(--error)}.status-indicator .error:before{content:"✗"}.status-header{display:flex;justify-content:space-between;align-items:center}.btn-small{padding:.4rem .8rem;font-size:.8rem}.balance-display{font-size:1.5rem;font-weight:600;color:var(--text)}.replay-info{background:var(--bg);padding:1rem;border-radius:8px;margin-bottom:1rem}.replay-info p{margin-bottom:.25rem}.options-panel{background:var(--bg);padding:1rem;border-radius:8px;margin-top:1rem}.output-container{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media(max-width:600px){.output-container{grid-template-columns:1fr}}.output{background:var(--code-bg);color:var(--code-text);padding:1rem;border-radius:8px;font-family:Monaco,Menlo,Ubuntu Mono,monospace;font-size:.85rem;overflow-x:auto;white-space:pre-wrap;word-break:break-word;max-height:400px;overflow-y:auto}.card.error{border-color:var(--error);background:#fef2f2}.card.error h2{color:var(--error)}.card.error .output{background:var(--error);color:#fff}footer{text-align:center;padding:2rem 0;color:var(--text-muted)}footer a{color:var(--primary);text-decoration:none}footer a:hover{text-decoration:underline}