.pi-container{max-width:800px;margin:0 auto;padding:2rem 1rem;min-height:calc(100vh - var(--header-height));display:flex;flex-direction:column}.pi-header{text-align:center;margin-bottom:2rem}.pi-header h1{font-size:2.5rem;font-weight:var(--font-weight-light);color:var(--text-primary);margin:0 0 0.5rem 0}.pi-subtitle{font-size:1rem;color:var(--text-secondary);font-weight:var(--font-weight-regular)}.pi-welcome{text-align:center;margin-bottom:2rem}.welcome-title{font-size:1.5rem;font-weight:var(--font-weight-regular);color:var(--text-primary);margin:0;line-height:1.4}.pi-chat{flex:1;margin-bottom:2rem;max-height:60vh;overflow-y:auto;padding-right:0.5rem;scroll-behavior:smooth}.pi-chat::-webkit-scrollbar{width:6px}.pi-chat::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:3px}.pi-chat::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.pi-chat::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.message{margin-bottom:1.5rem;animation:fadeIn 0.3s ease-out}.user-message{display:flex;justify-content:flex-end}.user-message .message-content{max-width:50%;background:var(--bg-tertiary);color:var(--text-primary);padding:0.75rem 1rem;border-radius:1.5rem 1.5rem 0.25rem 1.5rem;position:relative}.user-message .message-text{margin:0 0 0.25rem 0;font-size:0.95rem;line-height:1.4}.user-message .message-time{font-size:0.7rem;color:var(--text-muted);text-align:right;margin:0}.assistant-message{width:100%}.assistant-message .message-content{width:100%;padding:0}.assistant-message .message-text{font-size:1rem;line-height:1.6;color:var(--text-primary);margin:0 0 0.5rem 0}.assistant-message .message-time{font-size:0.8rem;color:var(--text-muted);margin:0}.typing-cursor{animation:blink 1s infinite;color:var(--accent-green);font-weight:bold}.loading-cursor{animation:blink 1s infinite;color:var(--accent-green);font-weight:bold}@keyframes blink{0%,50%{opacity:1}51%,100%{opacity:0}}.pi-input-container{position:sticky;bottom:0;background:var(--bg-primary);padding-top:1rem;border-top:1px solid var(--border-color)}.pi-input-wrapper{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius-large);padding:1rem;transition:border-color var(--transition-fast)}.pi-input-wrapper:focus-within{border-color:var(--accent-green)}.pi-toolbar{margin-bottom:1rem}.toolbar-group{display:flex;gap:0.5rem;align-items:center}.toolbar-btn{display:flex;align-items:center;gap:0.5rem;padding:0.5rem 0.75rem;background:var(--bg-tertiary);border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-secondary);font-size:0.9rem;font-weight:var(--font-weight-medium);cursor:pointer;transition:all var(--transition-fast);text-decoration:none}.toolbar-btn:hover{background:rgba(210,24,157,0.188);color:var(--text-primary);border-color:var(--accent-green)}.toolbar-btn:disabled{opacity:0.5;cursor:not-allowed}.dropdown{position:relative}.dropdown-menu{position:absolute;top:auto;bottom:100%;left:0;background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--border-radius);box-shadow:var(--shadow-medium);z-index:var(--z-dropdown);min-width:200px;opacity:0;visibility:hidden;transform:translateY(10px);transition:all var(--transition-fast)}.dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{display:flex;align-items:center;gap:0.75rem;padding:0.75rem 1rem;color:var(--text-secondary);cursor:pointer;transition:all var(--transition-fast);font-size:0.9rem;font-weight:var(--font-weight-regular)}.dropdown-item:hover{background:var(--bg-secondary);color:var(--text-primary)}.dropdown-item i:last-child{margin-left:auto;color:var(--accent-green)}.pi-input-area{display:flex;gap:0.75rem;align-items:flex-end}#messageInput{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:1rem;font-weight:var(--font-weight-regular);line-height:1.5;resize:none;min-height:24px;max-height:200px;font-family:var(--font-family)}#messageInput::placeholder{color:var(--text-muted)}.pi-send-btn{width:40px;height:40px;background:var(--accent-green);border:none;border-radius:50%;color:white;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);flex-shrink:0}.pi-send-btn:hover:not(:disabled){background:var(--accent-green-hover);transform:scale(1.05)}.pi-send-btn:disabled{background:var(--bg-tertiary);color:var(--text-muted);cursor:not-allowed;transform:none}.pi-footer{text-align:center;margin-top:1rem}.pi-footer p{font-size:0.8rem;color:var(--text-muted);margin:0;font-weight:var(--font-weight-regular)}@media (max-width:768px){.pi-container{padding:1rem 0.5rem}.pi-header h1{font-size:2rem}.welcome-title{font-size:1.3rem}.user-message .message-content{max-width:70%}.toolbar-group{flex-wrap:wrap}.toolbar-btn span{display:none}.dropdown-menu{min-width:150px}.pi-input-wrapper{padding:0.75rem}}@media (max-width:480px){.pi-container{padding:0.5rem}.pi-header h1{font-size:1.8rem}.welcome-title{font-size:1.2rem}.user-message .message-content{max-width:85%}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.message{animation:fadeIn 0.3s ease-out}.message-text img{max-width:100%;height:auto;border-radius:var(--border-radius);margin:0.5rem 0}.message-text code{background:var(--bg-tertiary);padding:0.2rem 0.4rem;border-radius:var(--border-radius-sm);font-family:var(--font-family-mono);font-size:0.9em}.message-text pre{background:var(--bg-tertiary);padding:1rem;border-radius:var(--border-radius);overflow-x:auto;margin:0.5rem 0}.message-text pre code{background:none;padding:0}