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var(--transition-fast);border:none;flex-shrink:0}.input-submit-btn:not(:disabled){background:var(--brand-primary);color:#fff;box-shadow:0 2px 8px #1ca5c240}.input-submit-btn:not(:disabled):hover{background:var(--brand-primary-hover);transform:translateY(-2px);box-shadow:0 4px 12px #1ca5c259}.input-submit-btn:not(:disabled):active{transform:translateY(0)}.input-submit-btn:disabled{background:var(--gray-200);color:var(--text-subtle);cursor:not-allowed}.input-hint{text-align:center;margin-top:10px;font-size:.75rem;color:var(--text-subtle)}.hint-key{padding:2px 6px;background:var(--surface-sunken);border-radius:var(--radius-sm);font-weight:500;color:var(--text-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 16px;font-size:.875rem;font-weight:500;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:none;text-decoration:none}.btn-primary{background:var(--brand-primary);color:var(--text-on-primary)}.btn-primary:hover{background:var(--brand-primary-hover)}.btn-primary:active{background:var(--brand-primary-active)}.btn-secondary{background:transparent;color:var(--text-muted);border:1px solid var(--border-default)}.btn-secondary:hover{background:var(--surface-sunken);color:var(--text-default);border-color:var(--border-strong)}.btn-ghost{background:transparent;color:var(--text-muted)}.btn-ghost:hover{background:var(--surface-sunken);color:var(--text-default)}.btn-icon{padding:8px}.btn-new-chat{width:100%;padding:12px 16px;background:var(--brand-primary);color:var(--text-on-primary);border-radius:var(--radius-md);font-size:.875rem;font-weight:500;display:flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;transition:all var(--transition-fast);border:none}.btn-new-chat:hover{background:var(--brand-primary-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.status-indicator{display:flex;align-items:center;gap:8px;font-size:.8125rem}.status-dot{width:10px;height:10px;border-radius:50%;position:relative}.status-dot.connected{background:var(--success)}.status-dot.connected:after{content:"";position:absolute;top:-3px;right:-3px;bottom:-3px;left:-3px;border-radius:50%;background:var(--success-muted)}.status-dot.connecting{background:var(--warning);animation:pulse 1.5s ease-in-out infinite}.status-dot.connecting:after{content:"";position:absolute;top:-3px;right:-3px;bottom:-3px;left:-3px;border-radius:50%;background:var(--warning-muted)}.status-dot.error{background:var(--error)}.status-dot.error:after{content:"";position:absolute;top:-3px;right:-3px;bottom:-3px;left:-3px;border-radius:50%;background:var(--error-muted)}.status-dot.disconnected{background:var(--gray-400)}.status-text{color:var(--text-muted);font-weight:500}.welcome-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;padding:48px 24px;text-align:center;background:linear-gradient(180deg,var(--surface-base) 0%,var(--surface-sunken) 100%)}.welcome-logo{width:72px;height:72px;border-radius:var(--radius-xl);background:linear-gradient(135deg,var(--brand-primary) 0%,#0077B6 100%);display:flex;align-items:center;justify-content:center;margin-bottom:28px;box-shadow:0 8px 24px #1ca5c24d}.welcome-logo-text{color:#fff;font-size:1.75rem;font-weight:700;letter-spacing:-.02em}.welcome-title{font-size:1.75rem;font-weight:700;color:var(--text-default);margin-bottom:12px;letter-spacing:-.02em}.welcome-subtitle{font-size:1rem;color:var(--text-muted);max-width:320px}.welcome-warning{margin-top:28px;padding:14px 24px;background:var(--warning-muted);border-radius:var(--radius-lg);color:var(--warning);font-size:.9375rem;border:1px solid rgba(245,158,11,.2)}.empty-chat-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:48px 24px;text-align:center;flex:1;animation:fadeIn .4s var(--transition-base) forwards}.empty-chat-icon{width:64px;height:64px;border-radius:var(--radius-xl);background:var(--brand-primary-subtle);display:flex;align-items:center;justify-content:center;margin-bottom:24px;box-shadow:0 4px 16px #1ca5c226}.empty-chat-title{font-size:1.25rem;font-weight:600;color:var(--text-default);margin-bottom:8px}.empty-chat-desc{font-size:.9375rem;color:var(--text-muted);max-width:400px;line-height:1.6;margin-bottom:32px}.empty-chat-suggestions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:500px}.suggestion-item{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--surface-raised);border:1px solid var(--border-default);border-radius:var(--radius-lg);font-size:.875rem;color:var(--text-muted);transition:all var(--transition-fast);cursor:pointer}.suggestion-item:hover{background:var(--brand-primary-subtle);border-color:var(--brand-primary);color:var(--brand-primary);transform:translateY(-2px)}.suggestion-icon{font-size:1rem}.scroll-anchor{height:1px;flex-shrink:0}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 24px;text-align:center;animation:fadeIn .3s var(--transition-base) forwards}.empty-state-icon{width:56px;height:56px;border-radius:var(--radius-lg);background:var(--brand-primary-subtle);display:flex;align-items:center;justify-content:center;margin-bottom:20px;box-shadow:0 4px 12px #1ca5c226}.empty-state-icon svg{width:28px;height:28px;color:var(--brand-primary)}.empty-state-title{font-size:1rem;font-weight:600;color:var(--text-default);margin-bottom:6px}.empty-state-description{font-size:.9375rem;color:var(--text-muted);line-height:1.5}.markdown-content>*:first-child{margin-top:0}.markdown-content>*:last-child{margin-bottom:0}.message-bubble pre{margin:4px 0;padding:16px;background:var(--gray-900);border-radius:var(--radius-md);overflow-x:auto}.message-bubble pre code{font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.875rem;line-height:1.6}.message-bubble code:not(pre code){padding:2px 6px;background:var(--gray-200);border-radius:var(--radius-xs);font-family:SF Mono,Fira Code,Consolas,monospace;font-size:.875em}.dark .message-bubble pre{background:var(--gray-800)}.dark .message-bubble code:not(pre code){background:var(--gray-300)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;animation:fadeInQuick .15s ease-out forwards}.modal-container,.modal{width:100%;max-width:480px;max-height:90vh;background:var(--surface-overlay);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);overflow:hidden;animation:fadeIn .2s ease-out forwards}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-muted)}.modal-title{font-size:1rem;font-weight:600;color:var(--text-default)}.modal-close{width:32px;height:32px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;background:transparent;color:var(--text-muted);cursor:pointer;transition:all var(--transition-fast);border:none}.modal-close:hover{background:var(--surface-sunken);color:var(--text-default)}.modal-body{padding:24px;overflow-y:auto}.modal-footer{display:flex;align-items:center;justify-content:flex-end;gap:12px;padding:16px 24px;border-top:1px solid var(--border-muted)}.agent-selector-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;animation:fadeInQuick .15s ease-out forwards}.agent-selector{width:100%;max-width:400px;max-height:70vh;background:var(--surface-overlay);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);overflow:hidden;display:flex;flex-direction:column;animation:fadeIn .2s ease-out forwards}.agent-selector-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border-muted)}.agent-selector-header h3{font-size:1rem;font-weight:600;color:var(--text-default);margin:0}.agent-selector-list{flex:1;overflow-y:auto;padding:8px}.agent-selector-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast);border:2px solid transparent}.agent-selector-item:hover{background:var(--surface-sunken)}.agent-selector-item.selected{background:var(--brand-primary-subtle);border-color:var(--brand-primary)}.agent-selector-icon{font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:var(--surface-base);border-radius:var(--radius-md)}.agent-selector-info{flex:1;min-width:0}.agent-selector-name{font-size:.9375rem;font-weight:500;color:var(--text-default);display:flex;align-items:center;gap:8px}.agent-selector-desc{font-size:.8125rem;color:var(--text-subtle);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.agent-selector-footer{padding:16px;border-top:1px solid var(--border-muted);display:flex;justify-content:flex-end}.form-group{margin-bottom:20px}.form-label{display:block;font-size:.875rem;font-weight:500;color:var(--text-default);margin-bottom:6px}.form-input{width:100%;padding:10px 12px;font-size:.9375rem;color:var(--text-default);background:var(--surface-base);border:1px solid var(--border-default);border-radius:var(--radius-md);outline:none;transition:all var(--transition-fast)}.form-input::-moz-placeholder{color:var(--text-subtle)}.form-input::placeholder{color:var(--text-subtle)}.form-input:focus{border-color:var(--brand-primary);box-shadow:0 0 0 3px var(--brand-primary-muted)}.form-select{width:100%;padding:10px 12px;font-size:.9375rem;color:var(--text-default);background:var(--surface-base);border:1px solid var(--border-default);border-radius:var(--radius-md);outline:none;cursor:pointer;transition:all var(--transition-fast)}.form-select:focus{border-color:var(--brand-primary);box-shadow:0 0 0 3px var(--brand-primary-muted)}.form-hint{font-size:.75rem;color:var(--text-subtle);margin-top:4px}@media(max-width:768px){.sidebar{position:fixed;top:56px;left:0;bottom:0;width:280px;z-index:50;transform:translate(-100%);transition:transform var(--transition-slow);box-shadow:var(--shadow-xl)}.sidebar.open{transform:translate(0)}.sidebar-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:40;opacity:0;pointer-events:none;transition:opacity var(--transition-slow);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.sidebar-overlay.open{opacity:1;pointer-events:auto}.chat-messages{padding:20px 16px}.chat-messages-inner{gap:20px}.chat-header{padding:12px 16px}.chat-input-area{padding:16px 16px 20px}.message{max-width:90%}.message-avatar{width:32px;height:32px}.message-bubble{padding:12px 14px}.empty-chat-suggestions{flex-direction:column;gap:8px}.suggestion-item{width:100%;justify-content:center}.input-container{padding:10px 14px}.input-submit-btn{width:36px;height:36px}.mobile-menu-btn{display:flex}.welcome-screen{padding:32px 20px}.welcome-logo{width:56px;height:56px}.welcome-logo-text,.welcome-title{font-size:1.25rem}}@media(min-width:769px){.mobile-menu-btn,.sidebar-overlay{display:none}}@media(min-width:769px)and (max-width:1024px){.sidebar{width:240px}}.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh;min-height:100dvh;background:linear-gradient(180deg,var(--surface-base) 0%,var(--surface-sunken) 100%)}.login-container{width:100%;max-width:400px;padding:48px 24px;background:var(--surface-overlay);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg)}.login-logo{display:flex;justify-content:center;margin-bottom:24px}.login-title{font-size:1.5rem;font-weight:700;color:var(--text-default);text-align:center;margin-bottom:8px}.login-subtitle{font-size:.9375rem;color:var(--text-muted);text-align:center;margin-bottom:32px}.login-form{display:flex;flex-direction:column;gap:20px}.login-error{padding:12px 16px;background:var(--error-muted);border-radius:var(--radius-md);color:var(--error);font-size:.875rem}.login-submit{width:100%;padding:12px 24px;font-size:1rem}.login-toggle{margin-top:24px;text-align:center;font-size:.875rem;color:var(--text-muted)}.toggle-btn{background:none;border:none;color:var(--brand-primary);cursor:pointer;font-size:inherit;padding:0 4px;font-weight:500}.toggle-btn:hover{text-decoration:underline}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){color-scheme:dark}:root:not([data-theme=light]) body{background-color:var(--surface-base);color:var(--text-default)}}