@import"https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=Space+Mono:wght@400;700&display=swap";:root{--bg-primary: #0a0a0f;--bg-secondary: #13131a;--bg-tertiary: #1a1a24;--bg-elevated: #21212e;--text-primary: #e8e8f0;--text-secondary: #a8a8b8;--text-tertiary: #6a6a7a;--accent-primary: #7c3aed;--accent-secondary: #a78bfa;--accent-tertiary: #c4b5fd;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--border-color: #2a2a3a;--border-accent: #3a3a4a;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .4);--shadow-md: 0 4px 16px rgba(0, 0, 0, .5);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .6);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--transition: all .2s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:JetBrains Mono,Space Mono,monospace;background:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary);letter-spacing:-.02em}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}button{font-family:inherit;font-size:.9rem;font-weight:600;padding:.75rem 1.5rem;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);text-transform:uppercase;letter-spacing:.05em}.btn-primary{background:var(--accent-primary);color:#fff;box-shadow:0 0 20px #7c3aed4d}.btn-primary:hover{background:var(--accent-secondary);box-shadow:0 0 30px #7c3aed80;transform:translateY(-2px)}.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border:1px solid var(--border-accent)}.btn-secondary:hover{background:var(--bg-tertiary);border-color:var(--accent-primary)}.btn-danger{background:var(--error);color:#fff}.btn-danger:hover{background:#dc2626}.btn-success{background:var(--success);color:#fff}.btn-success:hover{background:#059669}button:disabled{opacity:.5;cursor:not-allowed;transform:none!important}input,textarea,select{font-family:inherit;font-size:.95rem;padding:.75rem 1rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);transition:var(--transition);width:100%}input:focus,textarea:focus,select:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px #7c3aed1a}.card{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:1.5rem;box-shadow:var(--shadow-sm);transition:var(--transition)}.card:hover{border-color:var(--border-accent);box-shadow:var(--shadow-md)}table{width:100%;border-collapse:collapse;background:var(--bg-secondary);border-radius:var(--radius-md);overflow:hidden}thead{background:var(--bg-tertiary)}th,td{padding:1rem;text-align:left;border-bottom:1px solid var(--border-color)}th{font-weight:700;color:var(--text-secondary);text-transform:uppercase;font-size:.8rem;letter-spacing:.1em}tr:hover{background:var(--bg-tertiary)}.badge{display:inline-block;padding:.25rem .75rem;border-radius:var(--radius-sm);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.badge-easy{background:#10b98133;color:var(--success)}.badge-medium{background:#f59e0b33;color:var(--warning)}.badge-hard{background:#ef444433;color:var(--error)}.badge-sql{background:#3b82f633;color:#60a5fa}.badge-python{background:#10b98133;color:#34d399}.badge-stat{background:#a855f733;color:#c084fc}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:var(--radius-sm)}::-webkit-scrollbar-thumb:hover{background:var(--border-accent)}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .3s ease-out}.monaco-editor{border-radius:var(--radius-md);overflow:hidden}@media (max-width: 768px){h1{font-size:2rem}h2{font-size:1.5rem}button{padding:.625rem 1.25rem;font-size:.85rem}}