.center-stage-stage{padding:var(--space-4);min-height:720px}.center-stage-app{background:var(--color-surface-primary);border:1px solid var(--color-border-subtle);border-radius:var(--radius-2xl);flex-direction:column;height:100%;min-height:700px;display:flex;overflow:hidden}.center-stage-header{padding:var(--space-3) var(--space-5);border-bottom:1px solid var(--color-border-subtle);align-items:center;display:flex}.center-stage-welcome{padding:var(--space-10) var(--space-6);justify-content:center;align-items:center;gap:var(--space-5);text-align:center;flex-direction:column;flex:1;display:flex}.center-stage-welcome-avatar{margin-bottom:var(--space-3)}.center-stage-welcome-title{font-family:var(--type-h2-family);font-size:var(--type-h2-size);font-weight:var(--type-h2-weight);line-height:var(--type-h2-leading);letter-spacing:var(--type-h2-tracking);color:var(--color-text-primary);margin:0 0 var(--space-2)}.center-stage-composer{gap:var(--space-4);flex-direction:column;width:100%;max-width:640px;display:flex}.center-stage-composer-bottom{padding:var(--space-2) var(--space-6);margin:0 auto}.center-stage-ai-input{max-width:100%}.center-stage-suggestions{justify-content:center}.center-stage-messages{padding:var(--space-6) var(--space-6) var(--space-4);gap:var(--space-5);scroll-behavior:smooth;flex-direction:column;flex:1;width:100%;max-width:720px;margin:0 auto;display:flex;overflow-y:auto}.center-stage-message{flex-direction:column;display:flex}.center-stage-message-user{align-items:flex-end}.center-stage-message-user .chat-content{max-width:80%}.center-stage-user-actions{margin-top:var(--space-1);opacity:0;transition:opacity var(--transition-fast);align-items:center;gap:0;display:flex}.center-stage-message-user:hover .center-stage-user-actions,.center-stage-message-user:focus-within .center-stage-user-actions{opacity:1}.center-stage-user-actions .btn-ghost{color:var(--color-icon-tertiary)}.center-stage-user-actions .btn-ghost:hover{color:var(--color-icon-primary)}.center-stage-user-actions-time{margin-right:var(--space-2);font-family:var(--type-caption-family);font-size:var(--font-size-xs);color:var(--color-text-secondary)}.center-stage-user-editor{gap:var(--space-2);flex-direction:column;width:80%;display:flex}.center-stage-user-editor-textarea{resize:none;width:100%;font-family:var(--type-body-family);font-size:var(--font-size-sm);color:var(--color-text-primary);background:var(--color-surface-primary);border:1px solid var(--color-border-primary);border-radius:var(--radius-lg);padding:var(--space-3) var(--space-4);transition:border-color var(--transition-fast);outline:none;line-height:1.6}.center-stage-user-editor-textarea:focus{border-color:var(--color-border-hover)}.center-stage-user-editor-actions{justify-content:flex-end;gap:var(--space-2);display:flex}.center-stage-answer,.center-stage-actions{animation:.2s center-stage-fade-in}.chat-turn--hover-actions .center-stage-actions{animation:none}.center-stage-actions .btn-ghost{color:var(--color-icon-tertiary)}.center-stage-actions .btn-ghost:hover,.center-stage-actions .btn-ghost.is-selected{color:var(--color-icon-primary)}.center-stage-feedback-modal{gap:var(--space-5);max-width:640px;padding:var(--space-8);flex-direction:column;display:flex}.center-stage-feedback-modal .dialog-title{margin-bottom:0}.center-stage-feedback-options{gap:var(--space-2);flex-wrap:wrap;display:flex}.center-stage-feedback-textarea{resize:vertical;width:100%;min-height:96px}.center-stage-feedback-notice{padding:var(--space-3) var(--space-4);background:var(--color-surface-subtle);border-radius:var(--radius-md);font-family:var(--type-caption-family);font-size:var(--font-size-xs);color:var(--color-text-secondary);margin:0;line-height:1.6}.center-stage-feedback-notice a{color:var(--color-text-primary);text-decoration:underline}.center-stage-composer-bottom{gap:var(--space-2)}@keyframes center-stage-fade-in{0%{opacity:0;transform:translateY(2px)}to{opacity:1;transform:translateY(0)}}.center-stage-thinking{align-items:center;gap:var(--space-2);color:var(--color-text-secondary);font-size:var(--font-size-sm);animation:.2s center-stage-fade-in;display:inline-flex}.center-stage-reasoning{animation:.2s center-stage-fade-in}.center-stage-reasoning-label{color:var(--color-text-secondary);font-family:var(--type-caption-family);font-size:var(--font-size-xs);cursor:pointer;transition:color var(--transition-fast);background:0 0;border:none;align-items:center;gap:6px;padding:0;display:inline-flex}.center-stage-reasoning-label:not(:disabled):hover{color:var(--color-text-secondary)}.center-stage-reasoning-label:disabled{cursor:default}.center-stage-reasoning-active .center-stage-reasoning-label{color:var(--color-text-secondary)}.center-stage-reasoning-chev{transition:transform .15s}.center-stage-reasoning-chev.open{transform:rotate(180deg)}.center-stage-reasoning-body{margin:var(--space-2) 0 0;padding:0 var(--space-1);font-size:var(--font-size-xs);color:var(--color-text-secondary);border-left:2px solid var(--color-border-subtle);padding-left:var(--space-3);line-height:1.5}