:root{font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*,*:before,*:after{box-sizing:border-box}body{margin:0;min-width:320px}:root{font-family:Inter,PingFang SC,Microsoft YaHei,system-ui,-apple-system,BlinkMacSystemFont,sans-serif;color:#111827;background-color:#f4f6fb}body{margin:0;min-height:100vh;background:radial-gradient(circle at top,#fef3f8,#f4f6fb)}#root{min-height:100vh;display:flex;justify-content:center;padding:40px 16px}.app-page{width:min(960px,100%);display:flex;flex-direction:column;gap:24px}.app-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;background:#fff;border-radius:24px;padding:32px;box-shadow:0 20px 60px #0f172a14}.app-header h1{margin:4px 0 12px;font-size:2rem}.subtitle{margin:0;color:#6b7280}.eyebrow{letter-spacing:.2em;text-transform:uppercase;font-size:.75rem;color:#9ca3af;margin:0}.ghost-btn{border:1px solid #e5e7eb;background:transparent;border-radius:999px;padding:10px 18px;font-weight:600;cursor:pointer;transition:background .2s ease}.ghost-btn:disabled{opacity:.6;cursor:not-allowed}.ghost-btn:not(:disabled):hover{background:#f3f4f6}.chat-panel{flex:1;background:#fff;border-radius:24px;padding:24px;box-shadow:0 20px 60px #0f172a0d;display:flex;flex-direction:column;gap:16px}.messages{flex:1;max-height:60vh;overflow-y:auto;display:flex;flex-direction:column;gap:16px}.message{padding:16px 18px;border-radius:18px;line-height:1.6;white-space:pre-wrap;box-shadow:0 8px 24px #0f172a0d}.message.user{background:#eef2ff;align-self:flex-end}.message.assistant{background:#ecfdf5;align-self:flex-start}.typing{font-size:.85rem;color:#6b7280}.error-banner{background:#fee2e2;color:#991b1b;padding:12px 16px;border-radius:12px}.composer{display:flex;flex-direction:column;gap:12px}.composer textarea{width:100%;border-radius:16px;border:1px solid #e5e7eb;padding:16px;resize:none;font-size:1rem;font-family:inherit;box-shadow:inset 0 2px 6px #0f172a0d}.composer textarea:focus{outline:2px solid #c7d2fe}.composer button{align-self:flex-end;background:#6366f1;border:none;color:#fff;padding:10px 20px;border-radius:999px;font-weight:600;cursor:pointer;transition:opacity .2s ease}.composer button:disabled{opacity:.6;cursor:not-allowed}@media(max-width:640px){.app-header,.chat-panel{padding:20px}.app-header{flex-direction:column}}