:root{--bg-primary: #0f1115;--bg-secondary: #181b21;--bg-tertiary: #232730;--text-primary: #ffffff;--text-secondary: #a1a1aa;--text-muted: #52525b;--accent-primary: #8b5cf6;--accent-secondary: #06b6d4;--accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));--border-color: #27272a;--border-hover: #3f3f46;--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--font-sans: "Inter", system-ui, -apple-system, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.5;-webkit-font-smoothing:antialiased;min-height:100vh}a{text-decoration:none;color:inherit}button{cursor:pointer;border:none;font-family:inherit}.container{max-width:1200px;margin:0 auto;padding:0 var(--spacing-md)}.glass-panel{background:#181b21b3;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.05);border-radius:var(--radius-md)}.btn-primary{background:var(--accent-gradient);color:#fff;padding:10px 20px;border-radius:var(--radius-sm);font-weight:600;transition:opacity .2s}.btn-primary:hover{opacity:.9}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 12px;border-radius:var(--radius-sm);transition:all .2s}.btn-ghost:hover{background:var(--bg-tertiary);color:var(--text-primary)}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-tertiary);border-radius:0}::-webkit-scrollbar-corner{background:transparent}.app-shell{display:flex;min-height:100vh}.sidebar{width:260px;position:fixed;top:0;bottom:0;left:0;background-color:var(--bg-primary);border-right:1px solid var(--border-color);display:flex;flex-direction:column;z-index:10}.sidebar-header{padding:var(--spacing-lg)}.brand-title{font-size:1.25rem;font-weight:700;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:4px}.sidebar-nav{flex:1;padding:0 var(--spacing-sm);display:flex;flex-direction:column;gap:4px}.nav-section-label{padding:16px 16px 8px;font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}.nav-item{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);font-weight:500;transition:all .2s}.nav-item:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.sidebar-link{display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.75rem;font-weight:500;transition:all .2s}.sidebar-link:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.nav-item.active{background-color:#8b5cf61a;color:var(--accent-primary);border:1px solid rgba(139,92,246,.2)}.sidebar-footer{padding:var(--spacing-md);border-top:1px solid var(--border-color)}.main-content{flex:1;margin-left:260px;padding:32px}.page-header{margin-bottom:48px}.page-title{font-size:1.875rem;font-weight:700;color:var(--text-primary);margin-bottom:8px}.page-subtitle{color:var(--text-secondary);font-size:1rem}.tools-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}.tool-card{position:relative;background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px;overflow:hidden;transition:transform .2s,border-color .2s;display:block}.tool-card:hover{transform:translateY(-2px);border-color:var(--border-hover)}.card-icon{display:inline-flex;padding:12px;border-radius:var(--radius-sm);background:#ffffff0d;color:var(--text-primary);margin-bottom:16px}.card-title{font-size:1.125rem;font-weight:700;color:var(--text-primary);margin-bottom:8px}.card-desc{font-size:.875rem;color:var(--text-secondary);line-height:1.6;margin-bottom:16px}.card-cta{display:flex;align-items:center;font-size:.875rem;font-weight:500;color:var(--text-muted);transition:color .2s}.tool-card:hover .card-cta{color:var(--text-primary)}.split-layout{display:grid;grid-template-columns:1fr;gap:32px}@media(min-width:1024px){.split-layout{grid-template-columns:350px 1fr;gap:48px}}.panel{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);overflow:hidden}.panel-header{padding:12px 16px;border-bottom:1px solid var(--border-color);background:#0003;display:flex;justify-content:space-between;align-items:center}.panel-title{font-size:.75rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em}.preview-panel{max-height:600px;overflow-y:auto;border-bottom:1px solid var(--border-color)}.panel-body{padding:24px}.controls-panel .panel-body{max-height:calc(100vh - 250px);overflow-y:auto}.preview-area{background-color:#000;min-height:400px;display:flex;justify-content:center;padding:32px}.control-group{margin-bottom:16px}.control-label{display:flex;align-items:center;justify-content:space-between;font-size:.875rem;color:var(--text-secondary);margin-bottom:8px}.input-text,.input-area{width:100%;background:#0003;border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:8px 12px;color:var(--text-primary);font-family:inherit;font-size:.875rem}.input-text:focus,.input-area:focus{outline:none;border-color:var(--text-muted)}.btn-icon{display:flex;align-items:center;justify-content:center;gap:8px;padding:4px;border-radius:4px;color:var(--text-secondary);transition:color .2s;background:transparent}.btn-icon:hover{background:#ffffff0d;color:var(--text-primary)}.message-list{display:flex;flex-direction:column;gap:12px;padding-right:8px}.segmented-control{display:flex;background-color:#0003;padding:4px;border-radius:8px;gap:4px}.segment-btn{flex:1;padding:8px;font-size:.75rem;font-weight:500;border-radius:6px;border:none;background:transparent;color:#9ca3af;cursor:pointer;transition:all .2s}.segment-btn:hover{color:#e5e7eb}.segment-btn.active.blue{background-color:#2563eb;color:#fff;box-shadow:0 1px 2px #0000001a}.segment-btn.active.green{background-color:#16a34a;color:#fff;box-shadow:0 1px 2px #0000001a}.message-item{background:#ffffff08;border:1px solid transparent;border-radius:var(--radius-sm);padding:12px}.message-item:hover{border-color:var(--border-color)}.section-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-color);padding-bottom:8px;margin-bottom:16px}.section-title{font-size:.75rem;font-weight:700;color:var(--text-primary);text-transform:uppercase;letter-spacing:.1em}.message-header{display:flex;justify-content:space-between;margin-bottom:8px}.message-controls{display:flex;gap:4px}.toggle-btn{font-size:10px;text-transform:uppercase;padding:4px 8px;border-radius:4px;background:#ffffff0d;color:var(--text-muted);transition:all .2s}.toggle-btn.active{background:var(--accent-primary);color:#fff}.btn-add{width:100%;padding:12px;background:var(--bg-secondary);border:1px dashed var(--border-color);border-radius:var(--radius-sm);color:var(--text-secondary);display:flex;align-items:center;justify-content:center;gap:8px;transition:all .2s;cursor:pointer}.btn-add:hover{background:var(--bg-tertiary);border-color:var(--text-muted);color:var(--text-primary)}.btn-reset{display:flex;align-items:center;gap:4px;background:none;border:none;color:var(--text-secondary);font-size:.75rem;font-weight:500;cursor:pointer;transition:all .2s;padding:4px 8px;border-radius:4px}.btn-reset:hover{color:#ff4d4f;background:#ff4d4f1a}.code-output{background:#1e1e1e;border:1px solid var(--border-color);border-radius:var(--radius-md);margin-top:24px;overflow:hidden}.code-tabs{display:flex;border-bottom:1px solid var(--border-color);background:#252526}.code-tab{padding:10px 16px;font-size:.75rem;font-weight:500;color:var(--text-secondary);background:transparent;border:none;border-right:1px solid var(--border-color);border-bottom:2px solid transparent;cursor:pointer;transition:all .2s}.code-tab:hover{background:#ffffff0d;color:var(--text-primary)}.code-tab.active{color:var(--accent-primary);border-bottom-color:var(--accent-primary)}.code-content{padding:16px;font-family:monospace;font-size:.8rem;color:#ccc;width:100%;height:200px;background:transparent;border:none;resize:none}