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var(--border)}.login-close{position:absolute;top:12px;right:14px;width:28px;height:28px;border:none;background:none;font-size:18px;color:var(--text-muted);cursor:pointer;border-radius:6px;display:flex;align-items:center;justify-content:center}.login-close:hover{color:var(--text);background:var(--hover-bg)}.login-card h3{font-size:20px;font-weight:500;color:var(--text-dark);margin-bottom:6px;text-align:center}.login-subtitle{font-size:13px;color:var(--text-muted);margin-bottom:20px;text-align:center}.login-field{margin-bottom:12px}.login-field label{display:block;font-size:13px;color:var(--text-dark);margin-bottom:6px;font-weight:500}.login-field input{width:100%;padding:11px 14px;border:1px solid var(--input-border);border-radius:10px;font-size:14px;outline:none;background:var(--field-bg);transition:border-color .2s;font-family:inherit}.login-field input:focus{border-color:var(--primary);background:var(--surface)}.login-btn{width:100%;padding:14px;border:none;border-radius:12px;font-size:15px;font-weight:500;cursor:pointer;transition:all .2s;font-family:inherit;letter-spacing:.5px}.login-btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;box-shadow:0 4px 12px #d4959a4d}.login-btn-primary:hover{box-shadow:0 6px 16px #d4959a66;transform:translateY(-1px)}.login-btn-primary:disabled{background:var(--btn-secondary-hover);cursor:not-allowed}.login-btn-secondary{background:var(--btn-secondary-bg);color:var(--text-dark)}.login-btn-secondary:hover{background:var(--btn-secondary-hover)}.login-divider{display:flex;align-items:center;gap:12px;margin:16px 0;color:var(--text-muted);font-size:12px}.login-divider:before,.login-divider:after{content:"";flex:1;height:1px;background:var(--border)}.login-hint{font-size:12px;color:var(--text-muted);margin-top:10px;text-align:center;min-height:16px;line-height:1.5}.login-hint.error{color:#e8838a}.login-hint.success{color:var(--primary-dark)}@media(min-width:768px){body{align-items:stretch;justify-content:stretch}#app{width:100%}.container{display:grid;grid-template-columns:240px minmax(0,1fr);height:100dvh;max-width:unset}.sidebar{display:flex;flex-direction:column;background:var(--header-bg);border-right:1px solid var(--border);overflow:visible}.sidebar-header{padding:20px 18px 14px;border-bottom:1px solid var(--border)}.sidebar-title{font-size:18px;font-weight:600;color:var(--text-dark);letter-spacing:1px}.sidebar-subtitle{font-size:11px;color:var(--text-muted);margin-top:2px}.sidebar-list{flex:1;overflow-y:auto;padding:8px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:10px;cursor:pointer;transition:background .15s}.sidebar-item:hover{background:var(--hover-bg)}.sidebar-item.active{background:var(--active-bg)}.sidebar-item-avatar{width:40px;height:40px;border-radius:50%;font-size:17px;flex-shrink:0;background:linear-gradient(135deg,var(--avatar-grad1),var(--avatar-grad2));display:flex;align-items:center;justify-content:center;color:var(--primary-dark)}.sidebar-item-body{flex:1;min-width:0}.sidebar-item-name{font-size:14px;font-weight:500;color:var(--text-dark);margin-bottom:2px}.sidebar-item-desc{font-size:12px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-actions{padding:10px;border-top:1px solid var(--border)}.sidebar-add-btn{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:10px;border:1px dashed var(--input-border);border-radius:10px;background:transparent;color:var(--text-muted);font-size:13px;cursor:pointer;transition:all .15s;font-family:inherit}.sidebar-add-btn:hover{border-color:var(--primary);color:var(--primary)}.chat-area{display:flex;flex-direction:column;min-height:0;background:var(--surface)}.menu-btn,.sidebar-backdrop{display:none}.messages{padding:24px 32px}.input-area,.header{padding:14px 24px}.avatar-picker-overlay,.char-panel-overlay,.char-form-overlay{align-items:center}.avatar-picker,.char-panel,.char-form{max-width:480px;width:90%;border-radius:20px;padding:28px 24px;max-height:85vh}.char-form{max-height:85vh}}@media(min-width:768px)and (max-width:1023px){.container{grid-template-columns:200px minmax(0,1fr)}.sidebar-header{padding:16px 14px 12px}.sidebar-title{font-size:16px}.sidebar-item{padding:10px;gap:10px}.sidebar-item-avatar{width:36px;height:36px;font-size:15px}.sidebar-item-name{font-size:13px}.sidebar-item-desc{font-size:11px}.messages{padding:18px 20px}.input-area,.header{padding:12px 20px}}@media(min-width:1440px){.message{max-width:60%}}@media(max-width:767px){body{align-items:flex-start;justify-content:flex-start}#app{width:100%}.container{display:grid;grid-template-columns:minmax(0,1fr);height:100dvh;max-width:100%}.sidebar{display:flex;position:fixed;top:0;left:0;bottom:0;width:min(280px,80vw);z-index:50;background:var(--surface);border-right:1px solid var(--border);flex-direction:column;box-shadow:4px 0 24px #0000001f;transform:translate(-100%);transition:transform .25s ease;visibility:hidden}.sidebar.open{transform:translate(0);visibility:visible}.sidebar-header{padding:16px 16px 12px;border-bottom:1px solid var(--border)}.sidebar-title{font-size:18px;font-weight:600;color:var(--text-dark)}.sidebar-subtitle{font-size:11px;color:var(--text-muted);margin-top:2px}.sidebar-list{flex:1;overflow-y:auto;padding:6px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:12px;border-radius:10px;cursor:pointer;transition:background .15s}.sidebar-item:hover{background:var(--hover-bg)}.sidebar-item.active{background:var(--active-bg)}.sidebar-item-avatar{width:42px;height:42px;border-radius:50%;font-size:18px;flex-shrink:0;background:linear-gradient(135deg,var(--avatar-grad1),var(--avatar-grad2));display:flex;align-items:center;justify-content:center;color:var(--primary-dark)}.sidebar-item-body{flex:1;min-width:0}.sidebar-item-name{font-size:15px;font-weight:500;color:var(--text-dark);margin-bottom:2px}.sidebar-item-desc{font-size:12px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sidebar-actions{padding:10px;border-top:1px solid var(--border)}.sidebar-add-btn{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:12px;border:1px dashed var(--input-border);border-radius:10px;background:transparent;color:var(--text-muted);font-size:14px;cursor:pointer;transition:all .15s;font-family:inherit}.sidebar-add-btn:hover{border-color:var(--primary);color:var(--primary)}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0000004d;z-index:49;opacity:0;pointer-events:none;transition:opacity .25s ease}.sidebar-backdrop.show{opacity:1;pointer-events:auto}.menu-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border:none;border-radius:8px;background:transparent;color:var(--text);font-size:20px;cursor:pointer;flex-shrink:0;margin-right:4px}.menu-btn:hover{background:var(--hover-bg)}.chat-area{display:flex;flex-direction:column;min-height:0}.header{padding:10px 12px;gap:8px}.avatar{width:36px;height:36px;font-size:17px}.avatar-small{width:30px;height:30px;font-size:14px}.header-info h2{font-size:15px}.header-info span{font-size:10px}.messages{padding:14px 10px;gap:10px}.message{max-width:90%}.bubble{font-size:13px;padding:8px 12px}.msg-avatar{width:28px;height:28px;font-size:14px}.input-area{padding:10px;gap:8px}.input-area input{padding:9px 14px;font-size:13px}.input-area button{width:36px;height:36px;font-size:15px}.avatar-picker,.char-panel,.char-form{max-width:100%;border-radius:16px 16px 0 0;padding:20px 14px calc(20px + env(safe-area-inset-bottom))}}