.mobile-chat-container{height:100dvh}.chat-messages{scrollbar-width:auto;scrollbar-color:var(--scrollbar-thumb)var(--scrollbar-track);background:var(--chat-bg);-webkit-overflow-scrolling:touch;overscroll-behavior:contain;overflow-anchor:none;transition:background-color .3s;overflow-y:auto}.chat-messages::-webkit-scrollbar{background-color:var(--scrollbar-track);width:14px}.chat-messages::-webkit-scrollbar-track{background:var(--scrollbar-track);border:1px solid var(--border-color);border-radius:10px;margin:5px 0}.chat-messages::-webkit-scrollbar-thumb{background-color:var(--scrollbar-thumb);border:2px solid var(--scrollbar-track);min-height:60px;box-shadow:0 0 2px var(--shadow-color);border-radius:10px;transition:background-color .2s}.chat-messages::-webkit-scrollbar-thumb:hover{background-color:var(--scrollbar-thumb-hover)}.messages-container{max-width:1000px;margin:0 auto}.message-bubble{word-break:break-word;border-radius:16px;max-width:80%;margin-bottom:10px;padding:10px 15px;transition:background-color .3s,color .3s}.message-bubble.user{background-color:var(--message-assistant-bg);color:var(--message-user-text);box-shadow:0 1px 3px var(--shadow-color);border-bottom-left-radius:4px;margin-left:0;margin-right:auto}.message-bubble.assistant,.message-bubble.streaming{color:var(--message-assistant-text);background-color:#0000;border-bottom-right-radius:4px;margin-left:auto;margin-right:0}.message-time.user{color:#6b7280;transition:color .3s}.dark .message-time.user{color:#d1d5db}.message-time.assistant{color:#6b7280;transition:color .3s}.dark .message-time.assistant{color:#d1d5db}.typing-indicator-wrapper{align-items:baseline;gap:2px;display:inline-flex}.typing-dots{align-items:baseline;gap:1px;display:inline-flex}.typing-dot{font-size:1.5em;font-weight:700;line-height:.5;animation:1.4s ease-in-out infinite typing-blink;display:inline-block}@keyframes typing-blink{0%,60%,to{opacity:1;transform:scale(1)}30%{opacity:.1;transform:scale(.8)}}.typing-indicator{animation:1.5s ease-in-out infinite pulse;display:inline-block}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.message-content{white-space:normal;overflow-wrap:break-word;line-height:1.5}.message-content[data-streaming=true]{white-space:pre-wrap}.message-bubble[dir=rtl] .message-content{text-align:right;direction:rtl}.message-bubble[dir=ltr] .message-content{text-align:left;direction:ltr}.message-bubble[dir=rtl] .message-time{text-align:right}.message-bubble[dir=ltr] .message-time{text-align:left}.language-modal-overlay{background-color:var(--overlay-bg);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:9999;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.language-modal-content{background-color:var(--background);border:2px solid var(--border-color);box-shadow:0 25px 50px -12px var(--shadow-color);border-radius:16px;flex-direction:column;width:100%;max-width:500px;height:600px;max-height:calc(100vh - 32px);transition:background-color .3s,border-color .3s;display:flex;overflow:hidden}.language-modal-header{border-bottom:1px solid var(--border-color);background-color:var(--sidebar-bg);flex-shrink:0;padding:16px}.language-modal-title{color:var(--sidebar-text);margin:0;font-size:20px;font-weight:700}.language-modal-close{color:var(--sidebar-text);cursor:pointer;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;padding:6px;transition:opacity .2s;display:flex}.language-modal-close:hover{opacity:.7}.language-search-input{background-color:var(--background);border:1px solid var(--input-border);width:100%;color:var(--foreground);box-sizing:border-box;border-radius:8px;outline:none;padding:10px 16px;font-size:14px;transition:background-color .3s,border-color .3s,color .3s}.language-list{background-color:var(--background);flex:1;min-height:0;overflow-y:auto}.country-header{background-color:var(--gray-light);align-items:center;gap:10px;padding:10px 16px;transition:background-color .3s;display:flex}.country-flag{font-size:20px}.country-name{color:var(--foreground);font-size:14px;font-weight:600;transition:color .3s}.language-item{text-align:left;border:none;border-bottom:1px solid var(--border-color);cursor:pointer;width:100%;color:var(--foreground);background:0 0;align-items:center;gap:12px;padding:10px 16px 10px 52px;transition:background-color .15s,color .3s;display:flex}.language-item:hover{background-color:#f0f0f0}.dark .language-item:hover{background-color:var(--button-hover-bg)}.language-item.selected{background-color:#282828;font-weight:600}.language-item.selected:hover{background-color:#282828}.language-item.selected .language-native-name{color:#fff}.language-item.selected .language-english-name{color:#aaa}.language-native-name{font-size:14px;font-weight:500}.language-english-name{color:#9ca3af;font-size:12px}[dir=rtl] .message-bubble.user{border-bottom-right-radius:16px;border-bottom-left-radius:4px;margin-left:20px;margin-right:auto}[dir=rtl] .message-bubble.assistant,[dir=rtl] .message-bubble.streaming{border-bottom-right-radius:4px;border-bottom-left-radius:16px;margin-left:auto;margin-right:20px}[dir=rtl] .message-content{text-align:right;direction:rtl}[dir=ltr] .message-content{text-align:left;direction:ltr}@media (max-width:768px){.mobile-chat-container{height:100dvh;height:calc(100dvh - env(safe-area-inset-top,0) - env(safe-area-inset-bottom,0));transform:translateZ(0)}.chat-header-container{z-index:10;flex:none;min-height:60px;position:relative;transform:translateZ(0);padding:12px 15px!important;padding-top:calc(12px + env(safe-area-inset-top,0))!important}.burger-menu-button{z-index:20;-webkit-tap-highlight-color:transparent;touch-action:manipulation;opacity:1!important;visibility:visible!important}.chat-messages{overscroll-behavior:contain;-webkit-overflow-scrolling:touch;height:calc(100dvh - 260px - env(safe-area-inset-top,0) - env(safe-area-inset-bottom,0));min-height:300px;padding:16px;padding-top:calc(16px + env(safe-area-inset-top,0));padding-bottom:calc(100px + env(safe-area-inset-bottom,0));flex:1;overflow-y:auto;transform:translateZ(0)}.messages-container{max-width:100%}.message-bubble{max-width:85%;font-size:15px}.chat-footer{flex:none;min-height:40px;padding-bottom:calc(8px + env(safe-area-inset-bottom,0))!important}[dir=rtl] .message-bubble.user{margin-left:auto;margin-right:0}[dir=rtl] .message-bubble.assistant,[dir=rtl] .message-bubble.streaming,[dir=ltr] .message-bubble.user{margin-left:0;margin-right:auto}[dir=ltr] .message-bubble.assistant,[dir=ltr] .message-bubble.streaming{margin-left:auto;margin-right:0}}@media (max-width:1024px) and (max-height:500px) and (orientation:landscape) and (min-aspect-ratio:4/3){.mobile-chat-container,.sidebar-container{display:none!important}.landscape-block{display:flex!important}}.landscape-block{z-index:9999;text-align:center;color:#fff;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);flex-direction:column;justify-content:center;align-items:center;display:none;position:fixed;inset:0}.landscape-message{max-width:400px;padding:40px 20px}.phone-rotate-icon{margin-bottom:20px;font-size:4rem;animation:2s ease-in-out infinite rotatePhone}@keyframes rotatePhone{0%,to{transform:rotate(0)}50%{transform:rotate(90deg)}}.landscape-message h2{text-shadow:0 2px 4px #0000004d;margin:0 0 16px;font-size:2rem;font-weight:600}.landscape-message p{opacity:.9;margin:0;font-size:1.1rem;line-height:1.5}