:root{color-scheme:light;font-family:Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif;--paper: #f7f3e8;--paper-line: rgba(38, 70, 83, .12);--ink: #153243;--teal: #1f6f78;--teal-soft: #dff1ef;--accent: #e76f51;--accent-soft: #f8ded7;--panel: rgba(255, 255, 255, .8);--shadow: 0 18px 45px rgba(21, 50, 67, .12)}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:linear-gradient(rgba(31,111,120,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(31,111,120,.05) 1px,transparent 1px),radial-gradient(circle at top,#fefcf7 0%,var(--paper) 68%);background-size:28px 28px,28px 28px,auto}button,textarea,input{font:inherit}.app-shell{min-height:100dvh;display:flex;justify-content:center;padding:14px 12px}.phone-frame{width:min(100%,440px);height:calc(100dvh - 28px)}.dialog-shell{height:100%;display:grid;grid-template-rows:minmax(0,1fr) auto;overflow:hidden;background:linear-gradient(rgba(31,111,120,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(31,111,120,.04) 1px,transparent 1px),#fffcf6f0;background-size:22px 22px,22px 22px,auto;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(21,50,67,.08);border-radius:24px;box-shadow:var(--shadow)}.eyebrow{margin:0;color:var(--teal);font-size:.82rem;letter-spacing:.08em;text-transform:uppercase}.intro-bubble h1{margin:10px 0 8px;font-size:1.3rem;line-height:1.15}.hero-copy{margin:0;line-height:1.55;max-width:30ch}.starter-chip,.ghost-button,.upload-button,.send-button{border:none;border-radius:999px;padding:10px 14px;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease}.starter-chip:hover,.ghost-button:hover,.upload-button:hover,.send-button:hover{transform:translateY(-1px)}.starter-chip{background:linear-gradient(135deg,var(--teal-soft),#ffffff);color:var(--ink);max-width:100%;white-space:normal;overflow-wrap:anywhere;text-align:left}.utility-chip{background:#ffffffd1;box-shadow:inset 0 0 0 1px #1532431f}.dialog-log{min-height:0;overflow-y:auto;padding:16px 14px;display:grid;align-content:start;gap:12px;overscroll-behavior:contain}.bubble{padding:13px 14px;border-radius:18px;line-height:1.6;animation:rise .22s ease;width:fit-content;max-width:min(86%,320px)}.bubble>p{margin:0}.bubble img,.image-preview img{width:100%;border-radius:14px;margin-top:10px;display:block}.bubble.user{padding:12px;background:linear-gradient(135deg,#1f6f7824,#1f6f7838);margin-left:auto}.bubble.assistant{background:linear-gradient(135deg,#e76f511c,#fffffff2);margin-right:auto}.bubble-streaming{border:1px dashed rgba(231,111,81,.4)}.typing-bubble{min-width:62px;padding:13px 16px}.typing-indicator{display:flex;align-items:center;gap:5px}.typing-indicator span{width:7px;height:7px;border-radius:50%;background:#15324380;animation:typing-dot .9s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.14s}.typing-indicator span:nth-child(3){animation-delay:.28s}.intro-bubble,.starter-bubble{max-width:100%}.starter-bubble{width:100%}.starter-list{min-width:0;max-width:100%;display:flex;flex-wrap:wrap;gap:8px}.markdown-content>:first-child{margin-top:0}.markdown-content>:last-child{margin-bottom:0}.markdown-content p,.markdown-content ul,.markdown-content ol,.markdown-content pre,.markdown-content blockquote{margin:0 0 .7em}.markdown-content ul,.markdown-content ol{padding-left:1.3em}.markdown-content li+li{margin-top:.25em}.markdown-content code{font-family:SFMono-Regular,Menlo,monospace;background:#15324312;padding:.08em .3em;border-radius:.35em}.markdown-content pre{overflow-x:auto;padding:.75em;border-radius:14px;background:#15324314}.markdown-content pre code{background:transparent;padding:0}.empty-state{border:1px dashed rgba(31,111,120,.28);background:#ffffffb8;line-height:1.6}.dialog-composer{padding:10px;display:grid;gap:8px;border-top:1px solid rgba(21,50,67,.1);background:#ffffffeb}.composer-bar{min-width:0;display:flex;align-items:flex-end;gap:7px;padding:5px;border-radius:26px;background:#f7f3e8d6;box-shadow:inset 0 0 0 1px #1532431a}.dialog-composer textarea{flex:1 1 auto;min-width:0;resize:none;min-height:42px;max-height:132px;border:none;border-radius:20px;padding:10px 12px;line-height:1.45;outline:none;background:#ffffffeb;box-shadow:inset 0 0 0 1px #15324314;overflow-y:hidden}.dialog-composer textarea:focus{box-shadow:inset 0 0 0 2px #1f6f7840}.dialog-composer input[type=file]{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}.icon-button{width:42px;height:42px;flex:0 0 42px;align-self:flex-end;display:grid;place-items:center;border:none;border-radius:50%;padding:0;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,opacity .16s ease}.icon-button:hover{transform:translateY(-1px)}.icon-button svg{width:25px;height:25px;fill:currentColor}.ghost-button,.upload-button{background:#fff;box-shadow:inset 0 0 0 1px #1532431f}.upload-button.icon-button{color:var(--teal);background:#fffffff0}.send-button{background:linear-gradient(135deg,var(--teal),#2f9e9a);color:#fff;box-shadow:0 10px 22px #1f6f7842}.send-button:disabled{cursor:wait;opacity:.7}.image-preview{position:relative;width:92px;border-radius:18px;overflow:hidden;border:1px solid rgba(21,50,67,.08)}.image-preview img{margin:0;aspect-ratio:1;object-fit:cover}.preview-remove{position:absolute;right:6px;bottom:6px;border:none;border-radius:999px;padding:4px 7px;color:#fff;background:#153243b8;font-size:.72rem;cursor:pointer}.error-banner{margin:0;color:#8d2717;background:var(--accent-soft);border-radius:14px;padding:10px 12px}@keyframes rise{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes typing-dot{0%,80%,to{opacity:.38;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}@media(max-width:420px){.app-shell{padding:0}.phone-frame{width:100%;height:100dvh}.dialog-shell{border-radius:0;border-inline:none}.intro-bubble h1{font-size:1.18rem}.bubble.user,.bubble.assistant{margin-inline:0;max-width:100%}}