:root{--bg: #0b1020;--panel: #121936;--muted: #97a3b6;--text: #e9eef7;--accent: #5f8cff;--danger: #f05454}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";background:radial-gradient(1200px 800px at 10% 10%,#11193c,#0b1020);color:var(--text)}.app{height:100%;display:grid;grid-template-rows:auto 1fr auto}.app__header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid rgba(255,255,255,.08);background:#12193699;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.brand{display:flex;gap:12px;align-items:center}.logo{font-size:26px}.subtitle{margin:0;color:var(--muted);font-size:12px}.actions{display:flex;gap:8px}.btn{background:var(--accent);color:#fff;border:none;padding:10px 14px;border-radius:12px;cursor:pointer;font-weight:600}.btn:disabled{opacity:.6;cursor:not-allowed}.btn--ghost{background:transparent;color:var(--text);border:1px solid rgba(255,255,255,.15)}.btn--danger{background:var(--danger)}.app__main{padding:12px;overflow:hidden}.messages{height:100%;max-width:860px;margin:0 auto;padding:8px 6px 12px;overflow-y:auto;display:flex;flex-direction:column;gap:14px}.empty{text-align:center;margin-top:10vh;opacity:.85}.typing{color:var(--muted);font-style:italic;font-size:14px;padding:8px 12px;align-self:center}.bubble{display:flex;align-items:flex-start;gap:10px;max-width:80%}.bubble--user{margin-left:auto;flex-direction:row-reverse}.bubble--bot{margin-right:auto}.avatar{width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;background:var(--panel);border:1px solid rgba(255,255,255,.08);border-radius:10px}.bubble__content{border-radius:16px;padding:12px 14px;line-height:1.5;box-shadow:0 6px 18px #0003;background:#ffffff0f;border:1px solid rgba(255,255,255,.12);max-width:420px;word-break:break-word;white-space:pre-line}.bubble--user .bubble__content{background:#5f8cff38;border:1px solid rgba(95,140,255,.4)}.bubble__content p{margin:0 0 8px}.bubble__content p:last-child{margin-bottom:0}.app__footer{border-top:1px solid rgba(255,255,255,.08);padding:12px;background:#12193699;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.chatbox{max-width:860px;margin:0 auto;display:grid;grid-template-columns:1fr auto;gap:10px}.chatbox__input{resize:none;overflow:hidden;background:#ffffff0f;border:1px solid rgba(255,255,255,.18);color:var(--text);border-radius:12px;padding:12px 14px;min-height:46px}.chatbox__input::placeholder{color:var(--muted)}@media (max-width: 640px){.app__header{padding:12px}.chatbox{grid-template-columns:1fr}.bubble{max-width:90%}}