:root{--bg-primary: #F8FAFC;--bg-card: #FFFFFF;--bg-input: #F1F5F9;--text-primary: #0F172A;--text-secondary: #64748B;--text-on-primary: #FFFFFF;--accent-primary: #2563EB;--accent-hover: #1D4ED8;--border-color: #E2E8F0;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius-md: .5rem;--radius-lg: .75rem}html{scrollbar-gutter:stable}body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh}#root{min-height:100vh}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:500;transition:all .2s;cursor:pointer;border:none;font-size:.95rem}.btn-primary{background-color:var(--accent-primary);color:var(--text-on-primary);box-shadow:var(--shadow-sm)}.btn-primary:hover{background-color:var(--accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.card{background-color:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--border-color);padding:2rem}.input-group{margin-bottom:1.5rem}.label{display:block;font-size:.875rem;font-weight:500;color:var(--text-primary);margin-bottom:.5rem}.input,.select{width:100%;padding:.75rem 1rem;border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--bg-input);color:var(--text-primary);font-size:1rem;transition:border-color .2s;box-sizing:border-box}.input:focus,.select:focus{outline:none;border-color:var(--accent-primary);background-color:#fff}.workspace-layout{display:flex;height:100vh;width:100vw;overflow:hidden;background-color:var(--bg-primary)}.sidebar{width:280px;background-color:var(--bg-card);border-right:1px solid var(--border-color);display:flex;flex-direction:column}.main-area{flex:1;display:flex;flex-direction:column;overflow:hidden}.top-bar{height:64px;border-bottom:1px solid var(--border-color);background-color:var(--bg-card);display:flex;align-items:center;justify-content:space-between;padding:0 1.5rem}.canvas-bg{background-image:radial-gradient(var(--text-secondary) 1px,transparent 1px);background-size:24px 24px;opacity:.5}.code-editor{width:100%;height:100%;padding:2rem;font-family:JetBrains Mono,Fira Code,monospace;font-size:14px;line-height:1.6;border:none;background-color:transparent;resize:none;outline:none}.sheet-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;margin:.25rem .5rem;border-radius:var(--radius-md);cursor:pointer;color:var(--text-secondary);transition:all .2s}.sheet-item:hover,.sheet-item.active{background-color:var(--bg-input);color:var(--text-primary)}.sheet-item.active{background-color:#e0f2fe;color:var(--accent-primary);font-weight:500}.page-container{max-width:1200px;margin:0 auto;padding:2rem;display:flex;flex-direction:column;min-height:100vh}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:3rem}.logo-area{display:flex;align-items:center;gap:.75rem;font-weight:700;font-size:1.125rem;color:var(--text-primary)}