*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;overflow-x:hidden}:root{--bg: #0b0b0f;--bg-elev: #14141c;--bg-elev-2: #1c1c26;--line: rgba(255, 255, 255, .08);--line-strong: rgba(255, 255, 255, .18);--text: #f4f4f6;--text-dim: #b6b6c2;--text-mute: #8a8a98;--accent: #f5e6c8;--accent-ink: #0b0b0f;--radius: 14px}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.55;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}a{color:inherit;text-decoration:none}button{font:inherit}img,video,svg{max-width:100%;display:block}.container{width:100%;max-width:880px;margin:0 auto;padding:0 clamp(20px,4vw,40px)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent);color:var(--accent-ink);padding:10px 14px;border-radius:8px;font-weight:600}.skip-link:focus{left:16px;top:16px;z-index:1000}.site-header{border-bottom:1px solid var(--line);background:#0b0b0fc7;backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);position:sticky;top:0;z-index:50}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700}.brand-mark{border-radius:8px}.site-nav{display:flex;align-items:center;gap:18px;font-size:14px;color:var(--text-dim)}.site-nav a:hover,.site-nav a:focus-visible{color:var(--text)}.chat-page main{flex:1;padding:clamp(24px,4vw,40px) 0}.chat-card{background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;height:clamp(520px,70vh,720px)}.chat-head{padding:20px 24px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.chat-head h1{margin:0 0 4px;font-size:clamp(1.4rem,2.4vw,1.7rem);letter-spacing:-.02em}.chat-sub{margin:0;font-size:.95rem;color:var(--text-dim);max-width:50ch}.chat-status{font-size:12px;letter-spacing:.12em;text-transform:uppercase;padding:6px 12px;border-radius:999px;background:#ff6b6b1f;color:#ff6b6b;font-weight:600}.chat-status[data-ready=true]{background:#6ee7a71f;color:#6ee7a7}.chat-log{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:12px;scrollbar-color:var(--line-strong) transparent}.msg{max-width:78%;padding:12px 16px;border-radius:14px;font-size:.98rem;line-height:1.5;animation:chatIn .25s ease-out both}.msg p{margin:0}.msg-bot{align-self:flex-start;background:var(--bg-elev-2);border:1px solid var(--line);color:var(--text)}.msg-user{align-self:flex-end;background:var(--accent);color:var(--accent-ink);border:1px solid transparent}@keyframes chatIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.chat-form{display:flex;gap:10px;padding:16px;border-top:1px solid var(--line);background:var(--bg-elev-2)}.chat-form input{flex:1;font:inherit;color:var(--text);background:var(--bg-elev);border:1px solid var(--line-strong);border-radius:999px;padding:12px 18px;min-height:44px}.chat-form input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #f5e6c82e}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:999px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-primary:hover,.btn-primary:focus-visible{transform:translateY(-1px);box-shadow:0 8px 18px -8px #f5e6c880}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.site-footer{border-top:1px solid var(--line);padding:24px 0;color:var(--text-mute);font-size:14px}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.site-footer nav{display:flex;gap:18px}.site-footer a:hover{color:var(--text)}@media (prefers-reduced-motion: reduce){.msg{animation:none}}