:root{--color-bg: #ffffff;--color-bg-secondary: #f7f8fa;--color-bg-hover: #f0f1f4;--color-bg-selected: #e8ecf4;--color-text-primary: #1a1d23;--color-text-secondary: #5f6570;--color-text-muted: #8b909a;--color-text-inverse: #ffffff;--color-border: #e2e4e9;--color-border-light: #eef0f3;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-light: #dbeafe;--color-primary-text: #1e40af;--color-success: #16a34a;--color-success-light: #dcfce7;--color-success-text: #166534;--color-danger: #dc2626;--color-danger-light: #fee2e2;--color-danger-text: #991b1b;--color-warning: #d97706;--color-warning-light: #fef3c7;--color-gray: #6b7280;--color-gray-light: #f3f4f6;--color-gray-text: #374151;--color-bubble-inbound: #f3f4f6;--color-bubble-outbound: #2563eb;--color-bubble-outbound-text: #ffffff;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;--font-size-xs: .75rem;--font-size-sm: .8125rem;--font-size-base: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.625;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .05);--header-height: 56px;--sidebar-width: 280px;--max-content-width: 1200px;--transition-fast: .15s ease;--transition-normal: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-family);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text-primary);background-color:var(--color-bg);min-height:100vh}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}button{font-family:inherit;font-size:inherit;cursor:pointer;border:none;background:none}input,textarea,select{font-family:inherit;font-size:inherit}ul,ol{list-style:none}img{max-width:100%;display:block}h1,h2,h3,h4,h5,h6{font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight)}.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-header{height:var(--header-height);display:flex;align-items:center;padding:0 var(--space-6);border-bottom:1px solid var(--color-border);background:var(--color-bg);position:sticky;top:0;z-index:100}.app-header__title{font-size:var(--font-size-lg);font-weight:var(--font-weight-bold);color:var(--color-text-primary)}.app-header__nav{display:flex;align-items:center;gap:var(--space-4);margin-left:auto}.app-main{flex:1;display:flex;flex-direction:column}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);border-radius:var(--radius-md);transition:all var(--transition-fast);white-space:nowrap;line-height:1;height:36px}.btn-primary{background:var(--color-primary);color:var(--color-text-inverse)}.btn-primary:hover{background:var(--color-primary-hover)}.btn-secondary{background:var(--color-bg);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-bg-hover)}.btn-danger{background:var(--color-danger);color:var(--color-text-inverse)}.btn-danger:hover{background:#b91c1c}.btn-ghost{background:transparent;color:var(--color-text-secondary)}.btn-ghost:hover{background:var(--color-bg-hover);color:var(--color-text-primary)}.btn:disabled{opacity:.5;cursor:not-allowed}.pill{display:inline-flex;align-items:center;padding:2px 8px;font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);border-radius:var(--radius-full);line-height:1.4;white-space:nowrap}.card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-4)}.input{width:100%;height:36px;padding:0 var(--space-3);font-size:var(--font-size-base);color:var(--color-text-primary);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);transition:border-color var(--transition-fast);outline:none}.input:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.input::placeholder{color:var(--color-text-muted)}.loading-spinner{display:flex;align-items:center;justify-content:center;padding:var(--space-8);color:var(--color-text-muted);font-size:var(--font-size-sm)}.error-banner{display:flex;align-items:center;gap:var(--space-3);padding:var(--space-3) var(--space-4);background:var(--color-danger-light);color:var(--color-danger-text);border-radius:var(--radius-md);font-size:var(--font-size-sm);margin:var(--space-4)}.error-banner__request-id{font-family:var(--font-mono);font-size:var(--font-size-xs);opacity:.8}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-12) var(--space-6);color:var(--color-text-muted);text-align:center}.empty-state__title{font-size:var(--font-size-md);font-weight:var(--font-weight-medium);margin-bottom:var(--space-2)}.empty-state__description{font-size:var(--font-size-sm)}.truncate{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.line-clamp-1{display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.filter-chips{display:flex;gap:var(--space-2)}.filter-chip{padding:var(--space-1) var(--space-3);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);border-radius:var(--radius-full);border:1px solid var(--color-border);background:var(--color-bg);color:var(--color-text-secondary);cursor:pointer;transition:all var(--transition-fast)}.filter-chip:hover{background:var(--color-bg-hover)}.filter-chip--active{background:var(--color-primary-light);color:var(--color-primary-text);border-color:var(--color-primary)}