:root{--ink:#17213b;--muted:#6f7890;--line:#e5e8ef;--accent:#ff725f;--accent-dark:#e85847;--blue:#315ed7;--soft:#f5f7fb;--white:#fff;--shadow:0 18px 55px rgba(35,48,82,.12)}
*{box-sizing:border-box}body{margin:0;font-family:Inter,Segoe UI,Arial,sans-serif;color:var(--ink);background:radial-gradient(circle at 15% 10%,#fff3e8 0,transparent 28%),linear-gradient(145deg,#f7f9ff,#eef3fb);min-height:100vh}
button,input,textarea{font:inherit}.shell{width:min(980px,100%);margin:0 auto;padding:24px}.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.brand{display:flex;align-items:center;gap:11px}.brand strong{font-size:20px}.brand small{display:block;color:var(--muted);margin-top:2px}.brand-mark{display:grid;place-items:center;width:42px;height:42px;background:var(--accent);color:#fff;border-radius:13px;font-weight:800;letter-spacing:-1px}.brand-mark.large{width:58px;height:58px;margin:auto;border-radius:18px;font-size:22px}.top-actions{display:flex;align-items:center;gap:14px}.status{font-size:12px;background:#e9f7ef;color:#27825a;padding:7px 10px;border-radius:99px}.top-actions a,.link-button{color:var(--blue);text-decoration:none;border:0;background:none;cursor:pointer;padding:0}.chat-card{height:calc(100vh - 110px);min-height:570px;background:rgba(255,255,255,.94);border:1px solid rgba(255,255,255,.7);box-shadow:var(--shadow);border-radius:24px;display:flex;flex-direction:column;overflow:hidden}.messages{flex:1;overflow:auto;padding:30px clamp(18px,4vw,44px);scroll-behavior:smooth}.message{display:flex;gap:10px;max-width:82%;margin-bottom:18px;align-items:flex-end}.message.user{margin-left:auto;flex-direction:row-reverse}.avatar{flex:0 0 auto;display:grid;place-items:center;width:32px;height:32px;background:var(--accent);color:#fff;border-radius:10px;font-size:12px;font-weight:800}.bubble{white-space:pre-wrap;line-height:1.52;background:var(--soft);border-radius:17px 17px 17px 5px;padding:13px 16px}.user .bubble{background:var(--blue);color:#fff;border-radius:17px 17px 5px 17px}.sources{margin-top:9px;padding-top:8px;border-top:1px solid rgba(0,0,0,.08);font-size:12px}.sources a{color:var(--blue)}.suggestions{display:flex;gap:8px;overflow:auto;padding:0 clamp(18px,4vw,44px) 14px}.suggestions button{white-space:nowrap;border:1px solid var(--line);background:#fff;color:#44506b;padding:9px 12px;border-radius:99px;cursor:pointer}.suggestions button:hover{border-color:var(--accent);color:var(--accent-dark)}.composer{display:flex;align-items:flex-end;gap:10px;margin:0 clamp(14px,3vw,34px);padding:12px;border:1px solid var(--line);border-radius:18px;background:#fff}.composer textarea{flex:1;border:0;outline:0;resize:none;max-height:130px;padding:8px;background:transparent;color:var(--ink)}.send{border:0;width:42px;height:42px;border-radius:13px;color:#fff;background:var(--accent);font-size:21px;cursor:pointer}.send:disabled{opacity:.5}.chat-footer{text-align:center;color:var(--muted);font-size:11px;padding:9px}.modal{position:fixed;inset:0;z-index:10;background:rgba(20,30,55,.72);backdrop-filter:blur(8px);display:grid;place-items:center;padding:20px}.modal[hidden]{display:none}.login-card{width:min(410px,100%);background:#fff;padding:34px;border-radius:24px;box-shadow:var(--shadow);text-align:center}.login-card h1{font-size:24px;margin:18px 0 8px}.login-card p{color:var(--muted);margin:0 0 22px}.login-card label{text-align:left;display:block;font-size:13px;font-weight:600}.login-card input{width:100%;margin-top:7px;border:1px solid var(--line);border-radius:12px;padding:13px;outline:0}.login-card input:focus{border-color:var(--blue)}.primary{width:100%;border:0;border-radius:12px;padding:13px;color:#fff;background:var(--accent);font-weight:700;cursor:pointer}.error{min-height:28px;color:#bd3326;font-size:13px;padding:7px}.typing .bubble{color:var(--muted)}
@media(max-width:640px){.shell{padding:0}.topbar{padding:13px 15px;margin:0}.status{display:none}.chat-card{height:calc(100vh - 68px);min-height:0;border-radius:0}.messages{padding-top:20px}.message{max-width:92%}.login-card{padding:28px 22px}}