:root{--orange:#ff6500;--orange-dark:#e85c00;--green:#b9f000;--black:#111;--text:#171717;--muted:#737986;--border:#e4e6e9;--soft:#f8f9fa;--white:#fff}*{box-sizing:border-box}html,body{min-height:100%;color:var(--text);background:#fff;margin:0}body{-webkit-font-smoothing:antialiased;font-family:Arial,Helvetica,sans-serif}button,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}.app-shell{background:#fff;flex-direction:column;min-height:100vh;display:flex}.header{border-bottom:1px solid var(--border);z-index:20;background:#fffffff7;justify-content:space-between;align-items:center;height:86px;padding:0 34px;display:flex;position:sticky;top:0}.header-brand{align-items:center;gap:13px;display:flex}.header-logo{object-fit:contain;width:50px;height:50px}.brand-copy{align-items:center;gap:13px;display:flex}.brand-name{color:var(--black);letter-spacing:-1.4px;font-size:27px;font-weight:800}.brand-name span{color:var(--orange)}.brand-divider{background:#d8dadd;width:1px;height:29px;display:block}.brand-help{color:#727987;font-size:19px;font-weight:400}.new-chat-button{min-height:46px;color:var(--orange);border:1.5px solid var(--orange);background:#fff;border-radius:12px;align-items:center;gap:8px;padding:0 18px;font-weight:650;transition:background .15s,color .15s,transform .15s;display:flex}.new-chat-button:hover:not(:disabled){background:var(--orange);color:#fff}.new-chat-button:active:not(:disabled){transform:scale(.98)}.plus{font-size:22px;font-weight:400;line-height:1}.chat-container{flex:1;width:min(850px,100% - 40px);margin:0 auto;padding-bottom:180px}.chat-container.active-chat{padding-top:50px}.welcome{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:calc(100vh - 245px);display:flex}.welcome-logo{object-fit:contain;width:150px;height:150px;margin-bottom:13px}.welcome h1{color:#151923;letter-spacing:-2px;margin:0;font-size:clamp(35px,5vw,48px);font-weight:800;line-height:1.08}.welcome>p{color:var(--muted);margin:15px 0 0;font-size:17px;line-height:1.6}.suggestions{flex-direction:column;gap:12px;width:100%;margin-top:36px;display:flex}.suggestions button{border:1px solid var(--border);text-align:left;background:#fff;border-radius:14px;grid-template-columns:48px 1fr 30px;align-items:center;width:100%;min-height:78px;padding:13px 20px;transition:border-color .15s,box-shadow .15s,transform .15s;display:grid;box-shadow:0 5px 16px #1218280b}.suggestions button:hover:not(:disabled){border-color:#ffb17e;transform:translateY(-1px);box-shadow:0 8px 24px #12182814}.suggestion-icon{color:var(--orange);font-size:31px;font-weight:500}.suggestion-title{color:#181b23;font-size:16px;font-weight:650}.suggestion-arrow{color:var(--orange);justify-self:end;font-size:34px;font-weight:300}.messages{flex-direction:column;gap:22px;display:flex}.message-row{align-items:flex-start;gap:10px;display:flex}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.assistant-avatar{border:1px solid var(--border);background:#fff;border-radius:50%;flex:0 0 40px;place-items:center;width:40px;height:40px;display:grid;box-shadow:0 3px 10px #0000000d}.assistant-avatar img{object-fit:contain}.message-bubble{white-space:pre-wrap;word-break:break-word;border-radius:16px;max-width:min(680px,84%);padding:15px 18px;font-size:15px;line-height:1.6}.message-row.user .message-bubble{background:var(--orange);color:#fff;border-bottom-right-radius:5px;box-shadow:0 5px 14px #ff650029}.message-row.assistant .message-bubble{color:#242833;border:1px solid var(--border);background:#fff;border-bottom-left-radius:5px;box-shadow:0 4px 14px #1218280a}.typing{align-items:center;gap:5px;min-height:49px;display:flex}.typing span{background:#8d929a;border-radius:50%;width:7px;height:7px;animation:1.2s ease-in-out infinite typing-dot}.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}@keyframes typing-dot{0%,60%,to{opacity:.35;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}.composer-wrapper{z-index:15;background:linear-gradient(#fff0,#fff 22%);padding:22px 20px 18px;position:fixed;bottom:0;left:0;right:0}.composer{background:#fff;border:1px solid #dcdfe4;border-radius:16px;align-items:center;gap:12px;width:min(850px,100%);min-height:72px;margin:0 auto;padding:10px 12px 10px 22px;transition:border-color .15s,box-shadow .15s;display:flex;box-shadow:0 8px 26px #12182814}.composer:focus-within{border-color:#ffad77;box-shadow:0 9px 30px #1218281a}.composer textarea{resize:none;width:100%;min-height:42px;max-height:130px;color:var(--text);background:0 0;border:none;outline:none;padding:10px 0;font-size:16px;line-height:1.45}.composer textarea::placeholder{color:#969ca7}.send-button{background:var(--orange);color:#fff;border:none;border-radius:50%;flex:0 0 50px;place-items:center;width:50px;height:50px;padding:0;font-size:27px;font-weight:300;transition:background .15s,transform .15s,box-shadow .15s;display:grid}.send-button:hover:not(:disabled){background:var(--orange-dark);box-shadow:0 5px 15px #ff650038}.send-button:active:not(:disabled){transform:scale(.95)}.disclaimer{color:#7f8590;text-align:center;width:min(850px,100%);margin:10px auto 0;font-size:11px}.error-message{z-index:30;color:#b93815;text-align:center;background:#fff4f0;border:1px solid #ffd0bf;border-radius:10px;width:min(600px,100% - 32px);padding:12px 15px;font-size:13px;font-weight:600;position:fixed;bottom:125px;left:50%;transform:translate(-50%)}.loading-screen{background:#fff;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;display:flex}.loading-logo{object-fit:contain}.loading-screen p{color:var(--muted);margin-top:12px;font-size:14px}@media (max-width:640px){.header{height:72px;padding:0 15px}.header-logo{width:42px;height:42px}.brand-name{font-size:22px}.brand-divider,.brand-help{display:none}.new-chat-button{min-height:41px;padding:0 12px;font-size:13px}.plus{font-size:19px}.chat-container{width:calc(100% - 28px);padding-bottom:150px}.chat-container.active-chat{padding-top:28px}.welcome{min-height:calc(100vh - 220px)}.welcome-logo{width:110px;height:110px}.welcome h1{letter-spacing:-1.5px;font-size:34px}.welcome>p{margin-top:10px;font-size:15px}.suggestions{margin-top:27px}.suggestions button{grid-template-columns:40px 1fr 22px;min-height:67px;padding:10px 14px}.suggestion-icon{font-size:26px}.suggestion-title{font-size:14px}.suggestion-arrow{font-size:27px}.message-bubble{max-width:88%;padding:12px 14px;font-size:14px}.assistant-avatar{flex-basis:34px;width:34px;height:34px}.assistant-avatar img{width:25px;height:25px}.composer-wrapper{padding:15px 11px 12px}.composer{border-radius:15px;min-height:61px;padding:7px 8px 7px 16px}.composer textarea{font-size:16px}.send-button{flex-basis:45px;width:45px;height:45px;font-size:24px}.disclaimer{margin-top:7px;font-size:10px}}