*{margin:0;padding:0;box-sizing:border-box}:root{--bg: #ffffff;--bg-sidebar: #f9f9f9;--bg-hover: #ececec;--bg-input: #f4f4f4;--bg-message-user: #f4f4f4;--bg-message-assistant: transparent;--text: #0d0d0d;--text-muted: #5d5d5d;--text-subtle: #8a8a8a;--border: #e5e5e5;--accent: #10a37f;--accent-hover: #0d8a6a;--accent-text: #ffffff;--danger: #ef4444;--shadow: 0 2px 8px rgba(0,0,0,.06);--modal-overlay: rgba(0, 0, 0, .55)}[data-theme=dark]{--bg: #212121;--bg-sidebar: #171717;--bg-hover: #2a2a2a;--bg-input: #2f2f2f;--bg-message-user: #2f2f2f;--bg-message-assistant: transparent;--text: #ececec;--text-muted: #b4b4b4;--text-subtle: #7a7a7a;--border: #2f2f2f;--accent: #10a37f;--accent-hover: #1ab48a;--accent-text: #ffffff;--danger: #ef4444;--shadow: 0 2px 8px rgba(0,0,0,.3);--modal-overlay: rgba(0, 0, 0, .65)}html,body{height:100%;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;overflow:hidden}.app{display:flex;height:100vh}.sidebar{width:260px;background:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:margin-left .2s ease;flex-shrink:0}.sidebar.hidden{margin-left:-260px}.sidebar-header{padding:12px;display:flex;gap:8px;align-items:center}.btn-new-chat{flex:1;display:flex;align-items:center;gap:8px;padding:10px 12px;background:transparent;border:1px solid var(--border);border-radius:8px;color:var(--text);cursor:pointer;font-size:14px;font-weight:500;transition:background .15s}.btn-new-chat:hover{background:var(--bg-hover)}.btn-icon,.btn-icon-sm{background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:8px;border-radius:6px;display:flex;align-items:center;justify-content:center;transition:background .15s,color .15s}.btn-icon-sm{padding:4px}.btn-icon:hover,.btn-icon-sm:hover{background:var(--bg-hover);color:var(--text)}.conversations{flex:1;overflow-y:auto;padding:8px}.conv-item{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-radius:8px;color:var(--text);text-decoration:none;font-size:14px;cursor:pointer;transition:background .15s;margin-bottom:2px}.conv-item:hover,.conv-item.active{background:var(--bg-hover)}.conv-title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.conv-actions{display:none;gap:2px}.conv-item:hover .conv-actions,.conv-item.active .conv-actions{display:flex}.guest-teaser{padding:16px 12px;color:var(--text-subtle);font-size:13px;text-align:center}.sidebar-footer{padding:12px;border-top:1px solid var(--border)}.lang-row{display:flex;flex-direction:column;gap:4px;padding:4px 8px 12px;margin-bottom:8px;border-bottom:1px solid var(--border)}.lang-label{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-subtle);font-weight:500}.lang-select{background:var(--bg-input);color:var(--text);border:1px solid var(--border);border-radius:6px;padding:7px 10px;font-size:13px;cursor:pointer;font-family:inherit;outline:none;transition:border-color .15s}.lang-select:hover{border-color:var(--text-muted)}.lang-select:focus{border-color:var(--accent)}.guest-cta{padding:4px 8px}.guest-cta strong{display:block;font-size:13px;margin-bottom:4px}.guest-cta p{font-size:12px;color:var(--text-muted);margin-bottom:10px;line-height:1.4}.user-menu{display:flex;align-items:center;gap:10px;padding:8px;border-radius:8px}.user-avatar{width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px;flex-shrink:0}.user-info{flex:1;overflow:hidden}.user-name{font-size:13px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-email{font-size:11px;color:var(--text-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.user-actions{display:flex;gap:2px}.logout-form{display:inline}[data-theme=dark] .icon-sun{display:block}[data-theme=dark] .icon-moon,[data-theme=light] .icon-sun{display:none}[data-theme=light] .icon-moon{display:block}.main{flex:1;display:flex;flex-direction:column;min-width:0}.top-bar{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid var(--border)}.brand-title{font-size:15px;font-weight:600;letter-spacing:-.01em}.top-bar-spacer{flex:1}.auth-actions{display:flex;gap:8px;align-items:center}.btn-ghost{padding:7px 14px;background:transparent;color:var(--text);border:1px solid var(--border);border-radius:999px;font-size:13px;font-weight:500;text-decoration:none;cursor:pointer;transition:background .15s,border-color .15s;font-family:inherit}.btn-ghost:hover{background:var(--bg-hover);border-color:var(--text-muted)}.btn-primary-sm,.btn-primary{padding:8px 16px;background:var(--accent);color:var(--accent-text);border:none;border-radius:999px;font-size:13px;font-weight:600;text-decoration:none;cursor:pointer;transition:background .15s;display:inline-block;text-align:center;font-family:inherit}.btn-primary{padding:12px 20px;font-size:14px;border-radius:10px}.btn-primary-sm:hover,.btn-primary:hover{background:var(--accent-hover)}.btn-primary.block,.btn-ghost.block{display:block;width:100%;padding:12px 20px;border-radius:10px;font-size:14px}.model-selector select{background:transparent;color:var(--text);border:1px solid var(--border);border-radius:6px;padding:6px 12px;font-size:13px;cursor:pointer;font-weight:500;font-family:inherit}.chat-area{flex:1;overflow-y:auto;padding:24px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;text-align:center;color:var(--text-muted);padding-bottom:40px}.empty-state h1{font-size:30px;font-weight:600;margin-bottom:8px;color:var(--text);letter-spacing:-.01em}.empty-state p{font-size:15px}.messages{max-width:768px;margin:0 auto;display:flex;flex-direction:column;gap:24px}.message{display:flex;gap:16px;align-items:flex-start}.message-avatar{width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:12px;flex-shrink:0}.message.user .message-avatar{background:#5d4037}.message-content{flex:1;padding-top:4px;word-wrap:break-word}.message.user .message-content{white-space:pre-wrap}.message.assistant .message-content{line-height:1.7}.message.assistant .message-content>*:first-child{margin-top:0}.message.assistant .message-content>*:last-child{margin-bottom:0}.message.assistant .message-content p{margin:0 0 12px}.message.assistant .message-content p:last-child{margin-bottom:0}.message.assistant .message-content ul,.message.assistant .message-content ol{margin:0 0 12px;padding-left:24px}.message.assistant .message-content li{margin:4px 0}.message.assistant .message-content li>p{margin:0}.message.assistant .message-content strong{font-weight:600;color:var(--text)}.message.assistant .message-content em{font-style:italic}.message.assistant .message-content h1,.message.assistant .message-content h2,.message.assistant .message-content h3,.message.assistant .message-content h4{margin:16px 0 8px;font-weight:600;line-height:1.3}.message.assistant .message-content h1{font-size:22px}.message.assistant .message-content h2{font-size:19px}.message.assistant .message-content h3{font-size:17px}.message.assistant .message-content h4{font-size:15px}.message.assistant .message-content a{color:#5fb3ff;text-decoration:underline}.message.assistant .message-content blockquote{margin:8px 0 12px;padding:4px 0 4px 14px;border-left:3px solid var(--border);color:var(--text-muted)}.message.assistant .message-content code{background:var(--bg-input);padding:2px 6px;border-radius:4px;font-family:SF Mono,Monaco,Courier New,monospace;font-size:.92em}.message.assistant .message-content pre{background:var(--bg-input);border:1px solid var(--border);border-radius:8px;padding:12px 14px;margin:8px 0 12px;overflow-x:auto;font-size:13px;line-height:1.5}.message.assistant .message-content pre code{background:transparent;padding:0;border-radius:0;font-size:inherit}.message.assistant .message-content hr{border:0;border-top:1px solid var(--border);margin:16px 0}.message.assistant .message-content table{border-collapse:collapse;margin:8px 0 12px}.message.assistant .message-content th,.message.assistant .message-content td{border:1px solid var(--border);padding:6px 12px;text-align:left}.message.assistant .message-content th{background:var(--bg-input);font-weight:600}.typing-cursor{display:inline-block;width:8px;height:16px;background:var(--text);margin-left:2px;vertical-align:text-bottom;animation:blink 1s steps(2,start) infinite}@keyframes blink{to{visibility:hidden}}.message.assistant:not(.streaming) .typing-cursor{display:none}.typing-indicator{display:inline-flex;gap:4px;align-items:center}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:var(--text-muted);animation:typing 1.4s infinite ease-in-out}.typing-indicator span:nth-child(2){animation-delay:.2s}.typing-indicator span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{opacity:.3;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}.composer{padding:16px 24px 20px;max-width:768px;margin:0 auto;width:100%}.composer-form{display:flex;align-items:flex-end;gap:8px;background:var(--bg-input);border:1px solid var(--border);border-radius:24px;padding:8px 8px 8px 16px;box-shadow:var(--shadow)}.composer-form textarea{flex:1;background:transparent;border:none;outline:none;color:var(--text);font-size:15px;font-family:inherit;line-height:1.5;resize:none;max-height:200px;padding:8px 0}.btn-send,.btn-mic,.btn-voice-toggle{width:36px;height:36px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,color .15s,opacity .15s;flex-shrink:0;font-family:inherit}.btn-send{background:var(--accent);color:#fff}.btn-send:hover{background:var(--accent-hover)}.btn-send:disabled{opacity:.4;cursor:not-allowed}.btn-mic,.btn-voice-toggle{background:transparent;color:var(--text-muted)}.btn-mic:hover,.btn-voice-toggle:hover{background:var(--bg-hover);color:var(--text)}.btn-mic.recording{background:var(--danger);color:#fff;animation:micPulse 1.2s ease-in-out infinite}@keyframes micPulse{0%,to{box-shadow:0 0 #ef444499}50%{box-shadow:0 0 0 8px #ef444400}}.btn-voice-mode:hover{background:var(--accent);color:#fff}.voice-overlay{position:fixed;inset:0;background:radial-gradient(circle at center,#0e1726,#050810 70%,#000);z-index:200;display:flex!important;flex-direction:column;align-items:center;justify-content:space-between;padding:40px 24px 60px;color:#fff;overflow:hidden}.voice-overlay[style*=none]{display:none!important}.voice-close{position:absolute;top:24px;right:24px;width:44px;height:44px;border-radius:50%;background:#ffffff14;border:1px solid rgba(255,255,255,.15);color:#ffffffd9;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s}.voice-close:hover{background:#ffffff2e}.voice-stage{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:30px;width:100%;max-width:600px}.voice-orb{position:relative;width:240px;height:240px;cursor:pointer}.orb-core{position:absolute;inset:60px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fffffff2,#a5d8ff 25%,#4dabf7 55%,#1971c2);box-shadow:0 0 60px #4dabf799,inset 0 0 40px #ffffff4d;transition:background .4s,box-shadow .4s,transform .3s}.orb-ring{position:absolute;inset:0;border-radius:50%;border:1.5px solid rgba(77,171,247,.35);pointer-events:none;opacity:0}.orb-ring-2{inset:20px}.orb-ring-3{inset:40px}.voice-overlay[data-state=idle] .orb-core{animation:orbIdle 4s ease-in-out infinite}@keyframes orbIdle{0%,to{transform:scale(1)}50%{transform:scale(1.04)}}.voice-overlay[data-state=listening] .orb-core{background:radial-gradient(circle at 35% 30%,#fffffff2,#74c0fc 25%,#339af0 55%,#1864ab);box-shadow:0 0 80px #339af0cc,inset 0 0 50px #fff6;animation:orbListen 1.2s ease-in-out infinite}.voice-overlay[data-state=listening] .orb-ring{animation:orbRipple 2s ease-out infinite}.voice-overlay[data-state=listening] .orb-ring-2{animation-delay:.5s}.voice-overlay[data-state=listening] .orb-ring-3{animation-delay:1s}@keyframes orbListen{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}@keyframes orbRipple{0%{opacity:.6;transform:scale(.95)}to{opacity:0;transform:scale(1.35)}}.voice-overlay[data-state=processing] .orb-core{background:conic-gradient(from 0deg,#ffd43b,#fab005,#f08c00,#ffd43b);box-shadow:0 0 70px #fab00599,inset 0 0 30px #fff3;animation:orbSpin 1.5s linear infinite}@keyframes orbSpin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.voice-overlay[data-state=speaking] .orb-core{background:radial-gradient(circle at 35% 30%,#fffffff2,#69db7c 25%,#37b24d 55%,#2b8a3e);box-shadow:0 0 90px #37b24dcc,inset 0 0 50px #fff6;animation:orbSpeak .5s ease-in-out infinite alternate}.voice-overlay[data-state=speaking] .orb-ring{border-color:#37b24d66;animation:orbRipple 1.5s ease-out infinite}.voice-overlay[data-state=speaking] .orb-ring-2{animation-delay:.3s}.voice-overlay[data-state=speaking] .orb-ring-3{animation-delay:.6s}@keyframes orbSpeak{0%{transform:scale(1)}to{transform:scale(1.12)}}.voice-status{font-size:18px;font-weight:500;text-align:center;color:#fffffff2;letter-spacing:.01em;min-height:28px}.voice-transcript{font-size:16px;color:#ffffffa6;text-align:center;max-width:500px;min-height:24px;line-height:1.5;padding:0 16px}.voice-controls{display:flex;gap:24px;align-items:center}.voice-action{width:60px;height:60px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s,transform .1s}.voice-action:active{transform:scale(.94)}.voice-action-secondary{background:#ffffff1a;color:#ffffffe6}.voice-action-secondary:hover{background:#ffffff2e}.voice-action-secondary.muted{background:#ef4444d9;color:#fff}.voice-action-end{background:#e03131;color:#fff}.voice-action-end:hover{background:#c92a2a}@media(max-width:480px){.voice-orb{width:200px;height:200px}.orb-core{inset:50px}.voice-status{font-size:16px}.voice-transcript{font-size:14px}}.composer-hint{text-align:center;font-size:11px;color:var(--text-muted);margin-top:8px}.composer-hint a{color:var(--accent);text-decoration:none;font-weight:500}.composer-hint a:hover{text-decoration:underline}.modal-backdrop{position:fixed;inset:0;background:var(--modal-overlay);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:100;display:flex;align-items:center;justify-content:center;padding:20px;animation:fadeIn .2s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal{background:var(--bg-sidebar);border:1px solid var(--border);border-radius:16px;padding:36px 32px 28px;max-width:420px;width:100%;text-align:center;box-shadow:0 20px 60px #0006;position:relative;animation:slideUp .25s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.modal-close{position:absolute;top:14px;right:14px;background:transparent;border:none;color:var(--text-muted);cursor:pointer;padding:4px;border-radius:6px;transition:background .15s}.modal-close:hover{background:var(--bg-hover);color:var(--text)}.modal-icon{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--accent) 0%,#0d8a6a 100%);color:#fff;margin:0 auto 16px;display:flex;align-items:center;justify-content:center}.modal h3{font-size:20px;font-weight:600;margin-bottom:8px;letter-spacing:-.01em}.modal p{color:var(--text-muted);font-size:14px;margin-bottom:22px}.modal-actions{display:flex;flex-direction:column;gap:10px}.conversations::-webkit-scrollbar,.chat-area::-webkit-scrollbar{width:8px}.conversations::-webkit-scrollbar-track,.chat-area::-webkit-scrollbar-track{background:transparent}.conversations::-webkit-scrollbar-thumb,.chat-area::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}@media(max-width:768px){.sidebar{position:fixed;z-index:50;height:100vh;box-shadow:var(--shadow)}.sidebar.hidden{margin-left:-260px}.composer,.messages{padding-left:12px;padding-right:12px}.brand-title{display:none}.auth-actions .btn-ghost{padding:6px 10px}}