.chat-widget{position:fixed;right:1.25rem;bottom:1.25rem;z-index:1000;font-size:.95rem}.chat-bubble{width:3.25rem;height:3.25rem;border-radius:999px;border:none;background:#1a1a1a;color:#fff;font-size:1.4rem;cursor:pointer;box-shadow:0 4px 14px #00000040}.chat-bubble:hover{transform:scale(1.05)}.chat-panel{width:min(360px,90vw);height:min(520px,70vh);background:#fff;border-radius:12px;box-shadow:0 8px 30px #0003;display:flex;flex-direction:column;overflow:hidden;border:1px solid #e5e5e5}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;background:#1a1a1a;color:#fff;font-weight:600}.chat-close{background:none;border:none;color:#fff;font-size:1.25rem;cursor:pointer;line-height:1}.chat-messages{flex:1;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:.6rem}.chat-empty{color:#888;font-size:.85rem}.chat-message{padding:.55rem .75rem;border-radius:10px;max-width:85%;white-space:pre-wrap;word-break:break-word}.chat-message-user{align-self:flex-end;background:#1a1a1a;color:#fff}.chat-message-assistant{align-self:flex-start;background:#f1f1f1;color:#1a1a1a}.chat-error{color:#b00020;font-size:.85rem}.chat-input-row{display:flex;gap:.5rem;padding:.75rem;border-top:1px solid #eee}.chat-input-row input{flex:1;padding:.5rem .7rem;border:1px solid #ddd;border-radius:8px;font-size:.9rem}.chat-input-row button{padding:.5rem .9rem;border:none;border-radius:8px;background:#1a1a1a;color:#fff;cursor:pointer}.chat-input-row button:disabled{opacity:.5;cursor:not-allowed}.page{max-width:720px;margin:0 auto;padding:4rem 1.5rem}.page h1{font-size:2.25rem;margin-bottom:.5rem}.page p{color:#555;font-size:1.1rem}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1a1a1a;background:#fff}button{font-family:inherit}