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var(--transition-base);position:relative;overflow:hidden}.url-item:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--transition-base)}.url-item:hover{transform:translateY(-2px);border-color:var(--color-border-hover);box-shadow:var(--shadow-xl)}.url-item:hover:before{transform:scaleX(1)}.url-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-4);gap:var(--space-4)}.url-type{display:inline-flex;align-items:center;padding:var(--space-1) var(--space-3);background:#8b5cf626;color:var(--color-primary-light);border-radius:var(--radius-full);font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);text-transform:uppercase;letter-spacing:.05em;border:1px solid rgba(139,92,246,.3)}.url-date{color:var(--color-text-muted);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium)}.delete-button{background:transparent;border:1px solid var(--color-border);color:var(--color-text-muted);font-size:var(--font-size-2xl);line-height:1;padding:var(--space-1) var(--space-2);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);min-width:2rem;min-height:2rem;display:flex;align-items:center;justify-content:center}.delete-button:hover:not(:disabled){background:var(--color-error-bg);border-color:var(--color-error);color:var(--color-error)}.delete-button:disabled{opacity:.5;cursor:not-allowed}.url-title{margin-bottom:var(--space-3);font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);line-height:var(--line-height-tight)}.url-link{display:block;color:var(--color-accent);text-decoration:none;margin-bottom:var(--space-4);font-size:var(--font-size-sm);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-family:var(--font-mono);transition:color var(--transition-fast)}.url-link:hover{color:var(--color-accent-hover);text-decoration:underline}.url-summary{color:var(--color-text-secondary);line-height:var(--line-height-relaxed);margin-top:var(--space-4);font-size:var(--font-size-base)}.url-summary.pending{color:var(--color-text-muted);font-style:italic;display:flex;align-items:center;gap:var(--space-2)}.url-summary.pending:before{content:"⏳";font-style:normal}.url-summary.processing{color:var(--color-primary);font-style:italic;display:flex;align-items:center;gap:var(--space-2)}.url-summary.failed{background:var(--color-error-bg);border:1px solid var(--color-error);border-radius:var(--radius-md);padding:var(--space-4);margin-top:var(--space-4)}.url-summary.failed .error-text{color:var(--color-error);margin:0 0 var(--space-3) 0;font-weight:var(--font-weight-medium)}.retry-button{background:#fff;border:1px solid var(--color-error);color:var(--color-error);padding:var(--space-2) var(--space-4);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.retry-button:hover:not(:disabled){background:var(--color-error);color:#fff}.retry-button:disabled{opacity:.5;cursor:not-allowed}.spinner{display:inline-block;width:1em;height:1em;border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .6s linear infinite}.empty-state{text-align:center;padding:var(--space-20) var(--space-8);color:var(--color-text-secondary);font-size:var(--font-size-lg)}.empty-state:before{content:"📭";display:block;font-size:var(--font-size-5xl);margin-bottom:var(--space-6);opacity:.5}@keyframes spin{to{transform:rotate(360deg)}}.loading:after{content:"";display:inline-block;width:1em;height:1em;margin-left:var(--space-2);border:2px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .6s linear infinite}@media(max-width:768px){.app{padding:var(--space-4)}.app-header h1{font-size:var(--font-size-3xl)}.header-content{flex-direction:column;align-items:flex-start}.form-group{flex-direction:column}.url-submit-form{padding:var(--space-6)}.signed-out-message{padding:var(--space-12) var(--space-4)}.signed-out-message h2{font-size:var(--font-size-3xl)}.url-item-header{flex-direction:column;align-items:flex-start}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.url-item{animation:fadeIn var(--transition-slow) ease-out}.url-item:nth-child(1){animation-delay:0ms}.url-item:nth-child(2){animation-delay:50ms}.url-item:nth-child(3){animation-delay:.1s}.url-item:nth-child(4){animation-delay:.15s}.url-item:nth-child(5){animation-delay:.2s}.tagline{font-size:var(--font-size-xl);color:var(--color-text-secondary);margin-bottom:var(--space-12);font-weight:var(--font-weight-medium)}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:var(--space-6);margin-bottom:var(--space-12);text-align:left}.feature{padding:var(--space-6);background:var(--color-surface);border-radius:var(--radius-xl);border:1px solid var(--color-border);transition:all var(--transition-base)}.feature:hover{transform:translateY(-2px);border-color:var(--color-border-hover);box-shadow:var(--shadow-lg)}.feature h3{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-3);color:var(--color-text-primary)}.feature p{font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:var(--line-height-relaxed);margin:0}.how-it-works{background:var(--color-surface);border-radius:var(--radius-xl);border:1px solid var(--color-border);padding:var(--space-8);margin-bottom:var(--space-10);text-align:left}.how-it-works h3{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);margin-bottom:var(--space-6);color:var(--color-text-primary);text-align:center}.how-it-works ol{margin:0;padding-left:var(--space-6);list-style:none;counter-reset:steps}.how-it-works li{counter-increment:steps;padding-left:var(--space-4);margin-bottom:var(--space-4);color:var(--color-text-secondary);line-height:var(--line-height-relaxed);position:relative}.how-it-works li:before{content:counter(steps);position:absolute;left:calc(-1 * var(--space-6));top:0;background:var(--gradient-primary);color:#fff;width:1.75rem;height:1.75rem;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:var(--font-weight-bold);font-size:var(--font-size-sm)}.how-it-works li:last-child{margin-bottom:0}@media(max-width:768px){.features{grid-template-columns:1fr}.how-it-works{padding:var(--space-6)}}.feedback-button{position:fixed;bottom:var(--space-6);right:var(--space-6);background:var(--gradient-primary);color:#fff;padding:var(--space-3) var(--space-5);border-radius:var(--radius-full);font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);text-decoration:none;box-shadow:var(--shadow-xl);transition:all var(--transition-base);z-index:1000;display:flex;align-items:center;gap:var(--space-2);border:none}.feedback-button:hover{transform:translateY(-2px) scale(1.05);box-shadow:var(--shadow-xl),var(--shadow-glow)}.feedback-button:active{transform:translateY(0) scale(1)}@media(max-width:768px){.feedback-button{bottom:var(--space-4);right:var(--space-4);font-size:var(--font-size-sm);padding:var(--space-2) var(--space-4)}}.url-actions{display:flex;gap:var(--space-3);align-items:center;margin-top:var(--space-4);flex-wrap:wrap}.dig-deeper-button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:var(--space-2) var(--space-4);font-size:var(--font-size-sm);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);display:inline-flex;align-items:center;gap:var(--space-2)}.dig-deeper-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-md)}.expand-button{background:var(--color-surface-elevated);color:var(--color-text-primary);padding:var(--space-2) var(--space-4);font-size:var(--font-size-sm);border:1px solid var(--color-border);border-radius:var(--radius-md)}.expand-button:hover:not(:disabled){background:var(--color-surface-hover);border-color:var(--color-border-hover)}.deep-summary-status{display:flex;align-items:center;gap:var(--space-2);color:var(--color-text-secondary);font-size:var(--font-size-sm);padding:var(--space-2) var(--space-3);background:var(--color-surface-elevated);border-radius:var(--radius-md)}.url-detail{margin-top:var(--space-6);padding:var(--space-6);background:var(--color-surface-elevated);border-radius:var(--radius-lg);border:1px solid var(--color-border)}.url-detail h4{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-4);color:var(--color-text-primary)}.url-detail-loading{padding:var(--space-4);text-align:center;color:var(--color-text-secondary)}.summary-section{padding:var(--space-5);background:var(--color-background);border-radius:var(--radius-md);border:1px solid var(--color-border);margin-bottom:var(--space-4)}.summary-section.deep{background:linear-gradient(135deg,#667eea0d,#764ba20d);border-color:#667eea4d}.summary-section h5{font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);margin-bottom:var(--space-3);color:var(--color-text-primary);display:flex;align-items:center;gap:var(--space-2)}.chunk-info{font-size:var(--font-size-sm);font-weight:var(--font-weight-normal);color:var(--color-text-secondary)}.summary-text{color:var(--color-text-primary);line-height:var(--line-height-relaxed);margin-bottom:var(--space-3)}.summary-meta{display:flex;gap:var(--space-4);flex-wrap:wrap;font-size:var(--font-size-xs);color:var(--color-text-muted)}.summary-meta span{padding:var(--space-1) var(--space-2);background:var(--color-surface);border-radius:var(--radius-sm)}.no-deep-summary{padding:var(--space-4);text-align:center;color:var(--color-text-secondary);background:var(--color-surface);border-radius:var(--radius-md);font-size:var(--font-size-sm)}