:root{--background:#0b0d10;--panel:#12161c;--panel-hover:#1a2029;--border:#252c37;--text:#f3f5f7;--muted:#8d98a8;--accent:#20c887;--accent-hover:#15aa70;--user-message:#202832}*{box-sizing:border-box}html,body{background:var(--background);min-height:100%;color:var(--text);margin:0;font-family:Arial,Helvetica,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}.login-page{background:radial-gradient(circle at top right, #20c8871f, transparent 28%), radial-gradient(circle at bottom left, #4285f417, transparent 30%), var(--background);place-items:center;min-height:100vh;padding:24px;display:grid}.login-card{border:1px solid var(--border);background:#12161cf5;border-radius:24px;width:100%;max-width:440px;padding:42px;box-shadow:0 24px 80px #00000059}.brand-icon{color:#fff;background:linear-gradient(135deg,#20c887,#168bff);border-radius:16px;place-items:center;width:52px;height:52px;font-size:27px;font-weight:800;display:grid;box-shadow:0 12px 25px #20c88733}.brand-icon.small{border-radius:10px;width:34px;height:34px;font-size:18px}.login-heading{margin:28px 0}.brand-name{color:var(--accent);letter-spacing:.08em;text-transform:uppercase;font-size:14px;font-weight:700}.login-heading h1{margin:10px 0 8px;font-size:30px}.login-heading p,.login-footer,.composer-note{color:var(--muted);line-height:1.5}.login-form{gap:18px;display:grid}.login-form label{color:#dbe2eb;gap:8px;font-size:14px;font-weight:600;display:grid}.login-form input{border:1px solid var(--border);width:100%;color:var(--text);background:#0e1217;border-radius:12px;outline:none;padding:14px 15px}.login-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #20c8871f}.primary-button{background:var(--accent);color:#042417;border:0;border-radius:12px;padding:14px;font-weight:800;transition:all .2s}.primary-button:hover{background:var(--accent-hover);transform:translateY(-1px)}.login-footer{text-align:center;margin:24px 0 0;font-size:14px}.login-footer button{color:var(--accent);background:0 0;border:0;padding:0;font-weight:700}.chat-layout{min-height:100vh;display:flex}.sidebar{border-right:1px solid var(--border);background:#0d1015;flex-direction:column;width:280px;display:flex}.sidebar-top{border-bottom:1px solid var(--border);padding:18px}.sidebar-brand{align-items:center;gap:10px;margin-bottom:22px;font-size:19px;font-weight:800;display:flex}.new-chat-button,.header-button{border:1px solid var(--border);color:var(--text);background:#151a21;transition:all .2s}.new-chat-button{text-align:left;border-radius:11px;width:100%;padding:12px;font-weight:700}.new-chat-button span{color:var(--accent);margin-right:7px;font-size:20px}.new-chat-button:hover,.header-button:hover,.conversation:hover{background:var(--panel-hover)}.conversation-list{flex:1;padding:18px 12px;overflow-y:auto}.sidebar-label{color:#687487;letter-spacing:.08em;margin:0 8px 10px;font-size:11px;font-weight:800}.conversation{color:#dfe5ec;text-align:left;background:0 0;border:0;border-radius:9px;align-items:center;gap:9px;width:100%;padding:11px;font-size:14px;display:flex;overflow:hidden}.conversation.active{background:#1a2028}.conversation span:last-child{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.conversation-icon{color:var(--accent)}.sidebar-bottom{border-top:1px solid var(--border);padding:12px}.profile-button{width:100%;color:var(--text);text-align:left;background:0 0;border:0;border-radius:10px;align-items:center;gap:10px;padding:9px;display:flex}.profile-button:hover{background:var(--panel-hover)}.profile-avatar,.message-avatar{color:#fff;background:linear-gradient(135deg,#20c887,#168bff);border-radius:50%;flex:none;place-items:center;font-weight:800;display:grid}.profile-avatar{width:32px;height:32px}.profile-email{color:#c8d0da;text-overflow:ellipsis;white-space:nowrap;flex:1;font-size:13px;overflow:hidden}.chat-content{background:radial-gradient(circle at 70% 10%, #20c8870d, transparent 25%), var(--background);flex-direction:column;flex:1;min-width:0;min-height:100vh;display:flex}.chat-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;min-height:76px;padding:14px 28px;display:flex}.chat-header h1{margin:0;font-size:16px}.chat-header p{color:var(--muted);margin:5px 0 0;font-size:13px}.header-button{border-radius:9px;padding:10px 14px;font-size:13px;font-weight:700}.messages-area{flex:1;overflow-y:auto}.welcome-message{text-align:center;width:min(760px,100% - 40px);margin:0 auto;padding:12vh 0 40px}.welcome-logo{color:#fff;background:linear-gradient(135deg,#20c887,#168bff);border-radius:22px;place-items:center;width:70px;height:70px;margin:0 auto 20px;font-size:38px;font-weight:800;display:grid;box-shadow:0 14px 35px #20c88733}.welcome-message h2{margin:0;font-size:clamp(28px,4vw,42px)}.welcome-message>p{color:var(--muted);margin:14px 0 32px;font-size:16px}.suggestions{text-align:left;grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.suggestions button{border:1px solid var(--border);color:#dce2ea;background:#12161cb8;border-radius:15px;min-height:112px;padding:16px;line-height:1.45;transition:all .2s}.suggestions button:hover{background:var(--panel-hover);border-color:#3d4a5d;transform:translateY(-2px)}.suggestions span{color:var(--accent);margin-bottom:12px;font-size:20px;display:block}.message-list{width:min(820px,100% - 40px);margin:0 auto;padding:34px 0}.message-row{gap:13px;padding:19px 0;display:flex}.message-row.user{flex-direction:row-reverse}.message-row.user .message-content{background:var(--user-message);border:1px solid #2f3a48;border-radius:16px 16px 4px;max-width:min(680px,82%);padding:13px 16px}.message-row.assistant .message-content{max-width:min(720px,88%)}.message-avatar{width:34px;height:34px;font-size:14px}.message-row.assistant .message-avatar{border-radius:11px}.message-content strong{margin-bottom:6px;font-size:13px;display:block}.message-content p{color:#dde4ec;white-space:pre-wrap;margin:0;line-height:1.6}.composer-wrapper{width:min(880px,100% - 40px);margin:0 auto;padding:12px 0 22px}.composer{background:#151a21;border:1px solid #303947;border-radius:18px;align-items:end;gap:10px;padding:10px 11px 10px 16px;display:flex;box-shadow:0 10px 35px #00000038}.composer:focus-within{border-color:#4e6074}.composer textarea{resize:none;width:100%;max-height:180px;color:var(--text);background:0 0;border:0;outline:0;line-height:1.5}.composer textarea::placeholder{color:#7e8998}.send-button{background:var(--accent);color:#062418;border:0;border-radius:11px;flex:none;width:38px;height:38px;font-size:22px;font-weight:900}.send-button:hover{background:var(--accent-hover)}.composer-note{text-align:center;margin:10px 0 0;font-size:11px}@media (max-width:760px){.sidebar{display:none}.chat-header{padding:13px 16px}.suggestions{grid-template-columns:1fr}.welcome-message{padding-top:8vh}.login-card{padding:30px 24px}.header-button{display:none}}.auth-message{color:#b8f7db;background:#20c88714;border:1px solid #20c88752;border-radius:10px;margin:-4px 0 0;padding:11px 12px;font-size:13px;line-height:1.45}.primary-button:disabled{cursor:wait;opacity:.7}.sidebar-loading{color:var(--muted);margin:12px 8px;font-size:12px;line-height:1.5}.chat-notice{color:#b8f7db;background:#20c88714;border:1px solid #20c88747;border-radius:10px;width:min(820px,100% - 40px);margin:18px auto 0;padding:11px 13px;font-size:13px}.send-button:disabled{cursor:not-allowed;opacity:.55}.file-input-hidden{display:none}.attach-button{color:#d7e1ee;cursor:pointer;background:0 0;border:0;border-radius:10px;width:42px;height:42px;font-size:20px}.attach-button:hover{background:#ffffff14}.image-preview-box{color:#d7e1ee;background:#111820;border:1px solid #2c3b4f;border-radius:12px;justify-content:space-between;gap:12px;width:min(760px,100% - 32px);margin:0 auto 10px;padding:10px 12px;font-size:14px;display:flex}.image-preview-box button{color:#9fb3c8;cursor:pointer;background:0 0;border:0}.message-attachments{margin-top:10px}.message-image{object-fit:contain;border:1px solid #2a394c;border-radius:12px;max-width:min(460px,100%);max-height:420px;display:block}.message-content{max-width:min(760px,100%);line-height:1.65}.message-content p{white-space:pre-wrap;word-break:break-word;margin:6px 0 0}.message-content strong{margin-bottom:4px;display:inline-block}.message-row.assistant .message-content{font-size:15px}.message-row.assistant .message-content p{color:#f3f7fb}.message-row.user .message-content{background:#1d2936;border:1px solid #324256;border-radius:16px;padding:12px 14px}.message-row.assistant{align-items:flex-start}.message-row.assistant .message-content p{max-width:760px}.message-content h1,.message-content h2,.message-content h3{margin:18px 0 8px;font-weight:700;line-height:1.3}.message-content h1{font-size:22px}.message-content h2{font-size:19px}.message-content h3{font-size:17px}.message-content p{white-space:normal;margin:8px 0}.message-content ul,.message-content ol{margin:8px 0 12px 22px;padding:0}.message-content li{margin:6px 0;line-height:1.6}.message-content strong{font-weight:700}.message-content pre{color:#e7edf5;white-space:pre-wrap;background:#0d1117;border:1px solid #263447;border-radius:12px;padding:14px;overflow-x:auto}.message-content code{color:#d9e7ff;background:#111820;border-radius:5px;padding:2px 5px;font-family:monospace}.conversation-row{border-radius:10px;align-items:center;gap:4px;display:flex}.conversation-row.active{background:#ffffff0f}.conversation-row .conversation{flex:1;min-width:0}.delete-conversation-button{color:#8ea0b6;cursor:pointer;opacity:0;background:0 0;border:0;border-radius:8px;width:28px;height:28px;margin-right:6px;font-size:18px}.conversation-row:hover .delete-conversation-button{opacity:1}.delete-conversation-button:hover{color:#ff8b8b;background:#ff50501f}.rename-conversation-button{color:#8ea0b6;cursor:pointer;opacity:0;background:0 0;border:0;border-radius:8px;width:28px;height:28px;font-size:14px}.conversation-row:hover .rename-conversation-button{opacity:1}.rename-conversation-button:hover{color:#8fd3ff;background:#41b4ff1f}@media (max-width:768px){html,body{overflow-x:hidden}.chat-layout{flex-direction:column;height:100dvh;min-height:100dvh}.sidebar{border-bottom:1px solid #243244;border-right:0;width:100%;height:auto;max-height:190px}.sidebar-top{gap:10px;padding:12px}.sidebar-brand{display:none}.new-chat-button{justify-content:center;width:100%;height:44px}.conversation-list{align-items:center;gap:8px;padding:8px 10px 12px;display:flex;overflow:auto hidden}.sidebar-label{flex:none;margin:0 6px 0 0;font-size:10px}.conversation-row{flex:none;min-width:150px;max-width:220px}.conversation-row .conversation{height:38px}.conversation-row .conversation span:last-child{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.rename-conversation-button,.delete-conversation-button{opacity:1}.sidebar-bottom{display:none}.chat-content{flex:1;min-height:0}.chat-header{padding:10px 14px}.chat-header h1{text-overflow:ellipsis;white-space:nowrap;max-width:210px;font-size:15px;overflow:hidden}.chat-header p{font-size:12px}.header-button{height:36px;padding:0 10px;font-size:12px}.messages-area{padding:16px 12px 140px}.message-list{gap:18px}.message-row{gap:9px}.message-avatar{width:30px;height:30px;font-size:13px}.message-content{max-width:calc(100vw - 70px);font-size:14px}.message-row.user .message-content{padding:10px 12px}.message-image{max-width:100%;max-height:300px}.composer-wrapper{padding:8px 10px 10px}.composer{border-radius:18px;width:100%;min-height:54px}.composer textarea{font-size:15px}.selected-image-preview,.image-preview-box{width:100%}.composer-note{font-size:10px}.welcome-message{padding:20px 10px}.welcome-message h2{font-size:22px}.suggestions{grid-template-columns:1fr}}