*,:before,:after{box-sizing:border-box}*{margin:0;padding:0}:root{--primary:#6c47ff;--primary-dark:#5535d4;--primary-light:#ede8ff;--bg:#f5f4fb;--surface:#fff;--surface2:#f0eeff;--text:#1a1523;--text-muted:#6b6680;--border:#e2dff5;--code-bg:#1e1e2e;--radius:12px;--shadow:0 2px 16px #6c47ff14}body{background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,sans-serif;line-height:1.6}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.module{max-width:1080px}.module-header{margin-bottom:40px}.module-badge{background:var(--primary);color:#fff;text-transform:uppercase;letter-spacing:.08em;border-radius:20px;margin-bottom:12px;padding:3px 10px;font-size:11px;font-weight:700;display:inline-block}.module-title{margin-bottom:12px;font-size:34px;font-weight:800;line-height:1.15}.module-intro{color:var(--text-muted);max-width:65ch;font-size:16px;line-height:1.75}.section{margin-bottom:48px}.section-title{margin-bottom:10px;font-size:21px;font-weight:700}.section-text{color:#2d2840;max-width:68ch;margin-bottom:10px;font-size:15px;line-height:1.85}.callout{background:var(--primary-light);border-left:4px solid var(--primary);border-radius:0 8px 8px 0;max-width:68ch;margin:16px 0;padding:14px 18px;font-size:14px;line-height:1.7}.callout strong{color:var(--primary-dark)}.playground{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin:24px 0;overflow:hidden}.playground-header{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;background:var(--surface2);border-bottom:1px solid var(--border);align-items:center;gap:8px;padding:10px 18px;font-size:12px;font-weight:700;display:flex}.playground-dot{background:var(--primary);opacity:.7;border-radius:50%;width:8px;height:8px}.playground-body{grid-template-columns:280px 1fr;display:grid}.playground-controls{border-right:1px solid var(--border);flex-direction:column;gap:16px;padding:18px;display:flex;overflow-y:auto}.playground-preview{background:#fafafa radial-gradient(circle,#ddd8f8 1px,#0000 1px) 0 0/22px 22px;justify-content:center;align-items:center;min-height:260px;padding:32px 24px;display:flex;overflow:auto}.playground-code{border-top:1px solid var(--border);grid-column:1/-1}.ctrl-group{flex-direction:column;gap:6px;display:flex}.ctrl-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;justify-content:space-between;font-size:11px;font-weight:700;display:flex}.ctrl-value{color:var(--primary);font-family:Cascadia Code,Fira Code,monospace;font-size:12px;font-weight:700}.ctrl-slider{width:100%;accent-color:var(--primary);cursor:pointer;height:4px}.ctrl-select{border:1px solid var(--border);width:100%;color:var(--text);cursor:pointer;background:#fff;border-radius:6px;padding:6px 8px;font-family:Cascadia Code,Fira Code,monospace;font-size:13px}.ctrl-select:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #6c47ff1f}.ctrl-toggle-row{flex-wrap:wrap;gap:4px;display:flex}.ctrl-toggle-btn{border:1px solid var(--border);cursor:pointer;color:var(--text);white-space:nowrap;background:#fff;border-radius:6px;padding:4px 10px;font-family:Cascadia Code,Fira Code,monospace;font-size:12px;transition:all .15s}.ctrl-toggle-btn:hover{border-color:var(--primary);color:var(--primary)}.ctrl-toggle-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.ctrl-divider{border:none;border-top:1px solid var(--border);margin:2px 0}.app{flex-direction:column;min-height:100vh;display:flex}.app-header{z-index:200;border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;box-shadow:0 2px 12px #0000000d}.header-inner{align-items:center;gap:16px;max-width:1400px;margin:0 auto;padding:12px 24px;display:flex}.logo{color:inherit;flex-shrink:0;align-items:center;gap:12px;text-decoration:none;display:flex}.logo-icon{color:var(--primary);background:var(--primary-light);border-radius:8px;padding:5px 10px;font-family:Cascadia Code,Fira Code,monospace;font-size:20px;font-weight:800;line-height:1}.logo-title{color:var(--text);font-size:16px;font-weight:700;line-height:1.2;display:block}.logo-sub{color:var(--text-muted);font-size:11px;display:block}.tab-nav{scrollbar-width:none;border-top:1px solid var(--border);gap:2px;max-width:1400px;margin:0 auto;padding:0 24px;display:flex;overflow-x:auto}.tab-nav::-webkit-scrollbar{display:none}.tab-btn{color:var(--text-muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:3px solid #0000;flex-shrink:0;padding:9px 15px;font-size:13px;font-weight:500;transition:all .15s;position:relative;top:1px}.tab-btn:hover{color:var(--primary);background:var(--primary-light)}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:700}.app-main{flex:1;width:100%;max-width:1400px;margin:0 auto;padding:36px 28px}.progress-bar{background:var(--primary);height:3px;transition:width .3s}@media (width<=800px){.playground-body{grid-template-columns:1fr}.playground-controls{border-right:none;border-bottom:1px solid var(--border)}.app-main{padding:20px 16px}.module-title{font-size:26px}}