:root{--side-panel-width-mobile: 375px;--side-panel-width-desktop: 635px;--chat-list-ratio: 25.5%;--workspace-ratio: 74.5%}body{font-family:sans-serif;margin:0}#password-wall,#chat-container{height:100vh}#password-wall{display:flex;flex-direction:column;justify-content:center;align-items:center}#chat-container{display:none;flex-direction:row;height:100vh}#side-panel{width:var(--side-panel-width-mobile);flex-shrink:0;background-color:#f8f8f8;border-right:1px solid #ccc;display:flex;flex-direction:column}@media (min-width: 768px){#side-panel{width:var(--side-panel-width-desktop);flex-direction:row}}#side-panel-tabs{display:flex;border-bottom:1px solid #ccc}@media (min-width: 768px){#side-panel-tabs{display:none}}#side-panel-tabs button{flex-grow:1;padding:10px;background-color:#f1f1f1;border:none;cursor:pointer;font-size:1em;font-weight:700;color:#555;border-radius:0;margin-left:0;width:50%;height:auto}#side-panel-tabs button:hover{background-color:#e9e9e9}#side-panel-tabs button.active{background-color:#f8f8f8;color:#000;border-bottom:2px solid #007bff}.panel-content{padding:12px 16px;display:none;flex-direction:column;flex-grow:1;overflow:hidden}@media (min-width: 768px){.panel-content{display:flex!important;flex-direction:column;overflow:hidden}#chat-list-panel{width:var(--chat-list-ratio);border-right:1px solid #ccc;padding-right:8px}#workspace-panel{width:var(--workspace-ratio);padding-left:8px}#chat-list-panel #new-chat-button{width:100%;font-size:.85em}#chat-list-panel h3,#workspace-panel h3{font-size:1em;margin:0 0 10px}#chat-list li{font-size:.8em;padding:4px 6px}}.panel-content.visible{display:flex}@media (min-width: 768px){.panel-content.visible{display:flex!important}}#chat-list-panel h3{margin:10px 0 15px}#chat-list-panel h3,#workspace-panel h3{margin:10px 0;font-size:1.1em;font-weight:700}#new-chat-button{padding:8px 12px;margin-top:8px;margin-bottom:20px;background-color:transparent;color:#333;border:none;border-bottom:1px solid 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dark){.dialog-box{background:#1f2937;color:#f3f4f6}.dialog-header{border-bottom-color:#374151}.dialog-title{color:#f3f4f6}.dialog-message{color:#d1d5db}.dialog-input{background:#111827;border-color:#374151;color:#f3f4f6}.dialog-input:focus{border-color:#3b82f6}.dialog-footer{border-top-color:#374151}.dialog-btn.btn-secondary{background:#374151;color:#d1d5db}.dialog-btn.btn-secondary:hover{background:#4b5563;color:#f3f4f6}}.toast-container{position:fixed;bottom:20px;right:20px;z-index:9999;display:flex;flex-direction:column-reverse;gap:10px;pointer-events:none;max-width:420px}.toast{background:#fff;border-radius:8px;box-shadow:0 4px 12px rgba(0,0,0,.15);overflow:hidden;pointer-events:auto;transform:translate(calc(100% + 20px));transition:transform .3s cubic-bezier(.68,-.55,.265,1.55),opacity .3s ease;opacity:0;min-width:300px}.toast.toast-visible{transform:translate(0);opacity:1}.toast-content{display:flex;align-items:center;gap:12px;padding:12px 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.toast-icon{background:#ef4444;color:#fff}.toast-warning{border-left:4px solid #f59e0b}.toast-warning .toast-icon{background:#f59e0b;color:#fff}.toast-info{border-left:4px solid #3b82f6}.toast-info .toast-icon{background:#3b82f6;color:#fff}.toast:after{content:"";position:absolute;bottom:0;left:0;height:3px;background:currentColor;opacity:.2;animation:toast-progress linear forwards;animation-duration:var(--toast-duration, 3s)}@keyframes toast-progress{0%{width:100%}to{width:0}}@media (max-width: 640px){.toast-container{left:10px;right:10px;bottom:10px;max-width:none}.toast{min-width:auto;transform:translateY(calc(100% + 20px))}.toast.toast-visible{transform:translateY(0)}}@media (prefers-color-scheme: dark){.toast{background:#1f2937;box-shadow:0 4px 12px rgba(0,0,0,.5)}.toast-message{color:#f3f4f6}.toast-close{color:#6b7280}.toast-close:hover{background:rgba(255,255,255,.05);color:#9ca3af}.toast-action{color:#60a5fa}.toast-action:hover{background:rgba(96,165,250,.1)}}.toast-container .toast:nth-child(n+2){transform:translate(0) scale(.95);opacity:.9}.toast-container .toast:nth-child(n+3){transform:translate(0) scale(.9);opacity:.8}.toast-container .toast:nth-child(n+4){display:none}