*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--bg:#ededed;--white:#fff;--green:#95ec69;--text:#1a1a1a;--muted:#b0b0b0;--pink:#ff6b81;--border:#e5e5e5;--shadow:0 1px 2px rgba(0,0,0,.06);--radius:16px}body,html{height:100%;font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,Helvetica Neue,sans-serif;font-size:15px;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;overflow:hidden}.welcome-screen{display:flex;align-items:center;justify-content:center;min-height:100dvh;padding:20px;background:linear-gradient(135deg,#fce4ec,#f8bbd0,#f48fb1)}.welcome-card{background:var(--white);border-radius:20px;padding:32px 24px;max-width:360px;width:100%;text-align:center;box-shadow:0 8px 32px rgba(0,0,0,.08)}.welcome-heart{font-size:48px;margin-bottom:8px}.welcome-title{font-size:28px;font-weight:700;margin-bottom:8px}.welcome-subtitle{color:var(--muted);font-size:14px;margin-bottom:24px}.welcome-input-group{margin-bottom:20px}.key-input-wrapper{display:flex;align-items:center;border:1.5px solid var(--border);border-radius:12px;overflow:hidden;transition:border-color .2s}.key-input-wrapper:focus-within{border-color:var(--pink)}.key-input{flex:1 1;outline:none;padding:12px 16px;font-size:14px;font-family:monospace}.key-input,.key-toggle{border:none;background:transparent}.key-toggle{padding:8px 12px;cursor:pointer;font-size:16px}.welcome-error{color:#e74c3c;font-size:13px;margin-top:8px;text-align:left}.welcome-btn{width:100%;padding:14px;border:none;border-radius:12px;background:var(--pink);color:#fff;font-size:16px;font-weight:600;cursor:pointer;transition:opacity .2s}.welcome-btn:hover{opacity:.9}.welcome-info{margin-top:20px;font-size:12px;color:var(--muted);line-height:1.6}.welcome-info a{color:var(--pink);text-decoration:none}.chat-container{display:flex;flex-direction:column;height:100dvh;max-width:100%;background:var(--bg)}@media (min-width:768px){.chat-container{max-width:500px;margin:0 auto;border-left:1px solid var(--border);border-right:1px solid var(--border)}}.top-bar{display:flex;align-items:center;justify-content:space-between;background:var(--white);border-bottom:1px solid var(--border);flex-shrink:0;padding:max(12px,env(safe-area-inset-top)) 16px 12px}.top-bar-title{font-size:17px;font-weight:600}.settings-btn{border:none;background:transparent;font-size:20px;cursor:pointer;padding:4px 8px;border-radius:8px;transition:background .2s}.settings-btn:hover{background:#f0f0f0}.settings-panel{background:var(--white);border-bottom:1px solid var(--border);padding:8px 16px;flex-shrink:0}.settings-item{display:block;width:100%;text-align:left;padding:10px 8px;border:none;background:transparent;font-size:14px;cursor:pointer;border-radius:8px;transition:background .2s}.settings-item:hover{background:#f0f0f0}.settings-note{font-size:12px;color:var(--muted);padding:8px;line-height:1.5}.messages-area{flex:1 1;overflow-y:auto;padding:12px 16px;-webkit-overflow-scrolling:touch}.empty-chat{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--muted);font-size:15px;gap:8px}.empty-chat p:first-child{font-size:40px}.message-row{display:flex;align-items:flex-end;margin-bottom:8px;gap:8px;animation:fadeInUp .3s ease-out}.message-row--user{justify-content:flex-end}.message-row--ai{justify-content:flex-start}.message-group{margin-bottom:4px}.message-group .message-row{margin-bottom:2px}.avatar{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;background:var(--white)}.avatar--ai{background:#fce4ec}.avatar--user{background:#e8f5e9}.bubble{max-width:70%;padding:10px 14px;font-size:15px;line-height:1.5;word-break:break-word;position:relative}.bubble--ai{background:var(--white);border-radius:4px 18px 18px 18px;box-shadow:var(--shadow);color:var(--text)}.bubble--user{background:var(--green);border-radius:18px 4px 18px 18px;color:var(--text)}.emoji-bar{display:flex;align-items:center;gap:2px;padding:4px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.emoji-bar::-webkit-scrollbar{display:none}.emoji-btn{border:none;background:transparent;font-size:22px;padding:4px 6px;cursor:pointer;border-radius:8px;transition:background .15s;line-height:1;flex-shrink:0}.emoji-btn:hover{background:#e0e0e0}.emoji-btn:active{background:#ccc;transform:scale(1.1)}.emoji-toggle{border:none;background:transparent;font-size:13px;padding:4px 8px;cursor:pointer;color:var(--muted);flex-shrink:0;margin-left:auto}.chat-input-bar{padding:4px 12px max(8px,env(safe-area-inset-bottom));background:#f7f7f7;border-top:1px solid var(--border);flex-shrink:0}.chat-input-wrapper{display:flex;align-items:flex-end;gap:8px;background:var(--white);border-radius:24px;padding:4px 4px 4px 16px;border:1px solid var(--border)}.chat-input{flex:1 1;border:none;outline:none;resize:none;font-size:15px;font-family:inherit;padding:8px 0;max-height:120px;background:transparent;line-height:1.4}.chat-input::placeholder{color:var(--muted)}.send-btn{border:none;background:var(--pink);color:#fff;font-size:14px;font-weight:600;padding:8px 16px;border-radius:20px;cursor:pointer;flex-shrink:0;transition:opacity .2s;min-width:56px}.send-btn:disabled{opacity:.4;cursor:not-allowed}.typing-indicator{display:flex;gap:4px;padding:10px 14px;margin-bottom:8px}.typing-indicator span{width:8px;height:8px;border-radius:50%;background:var(--muted);animation:bounce 1.4s ease-in-out infinite both}.typing-indicator span:first-child{animation-delay:-.32s}.typing-indicator span:nth-child(2){animation-delay:-.16s}.error-banner{display:flex;align-items:center;justify-content:space-between;background:#fff3f3;color:#e74c3c;padding:10px 14px;border-radius:10px;margin-bottom:8px;font-size:13px}.error-banner button{border:none;background:transparent;cursor:pointer;font-size:14px;padding:2px 8px}@keyframes fadeInUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}.picker-panel{background:var(--white);border-top:1px solid var(--border);max-height:260px;overflow-y:auto}.picker-tabs{display:flex;border-bottom:1px solid var(--border)}.picker-tab{flex:1 1;padding:8px;background:transparent;font-size:13px;cursor:pointer;color:var(--muted);transition:color .15s,border-bottom .15s;border:none;border-bottom:2px solid transparent}.picker-tab--active{color:var(--pink);border-bottom-color:var(--pink);font-weight:600}.picker-grid{display:flex;flex-wrap:wrap;gap:4px;padding:8px}.picker-item{border:none;background:transparent;font-size:24px;padding:6px 8px;cursor:pointer;border-radius:8px;transition:background .15s}.picker-item:hover{background:#f0f0f0}.picker-grid--stickers{display:grid;grid-template-columns:repeat(5,1fr);grid-gap:8px;gap:8px;padding:8px}.sticker-item{border:none;background:transparent;cursor:pointer;padding:4px;border-radius:8px;display:flex;flex-direction:column;align-items:center;gap:2px;transition:background .15s}.sticker-item:hover{background:#f0f0f0}.sticker-thumb{width:48px;height:48px;object-fit:contain;border-radius:4px}.sticker-label{font-size:11px;color:var(--muted)}.sticker-bubble{max-width:60%;padding:4px}.sticker-img{width:100%;max-width:160px;height:auto;border-radius:8px;display:block}