*{box-sizing:border-box}:root{--navy: #112341;--navy-rgb: 17, 35, 65;--navy-hover: #0c1a30;--gold: #cbac75;--gold-hover: #ac9263}body{margin:0;font-family:system-ui,-apple-system,sans-serif;background:#fff;color:var(--navy)}.app{max-width:560px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column}.start-screen{justify-content:center;align-items:center;text-align:center;padding:2rem;gap:.5rem}.start-screen h1{font-size:1.8rem;margin:0 0 .25rem}.subtitle{color:#666;margin:0 0 .25rem}.byline{font-style:italic;font-size:.8rem;color:rgba(var(--navy-rgb),.55);margin:0 0 1.5rem}.start-button{padding:.85rem 2rem;border:none;border-radius:999px;background:var(--gold);color:var(--navy);font-size:1rem;cursor:pointer}.start-button:hover{background:var(--gold-hover)}.chat-screen{padding:0 1rem}.chat-header{position:sticky;top:0;z-index:10;background:#fff;text-align:center;padding-top:1.5rem;padding-bottom:1rem;border-bottom:1px solid #e5e5e5}.reset-button{position:absolute;top:0;right:0;padding:.35rem .8rem;border:1px solid var(--navy);border-radius:999px;background:#fff;color:var(--navy);font-size:.8rem;cursor:pointer}.reset-button:hover{background:var(--navy);color:#fff}.chat-header h1{font-size:1.3rem;margin:0 0 .25rem}.chat-header .subtitle{font-size:.85rem;margin:0}.messages{flex:1;overflow-y:auto;padding:1.25rem 0;display:flex;flex-direction:column;gap:.75rem}.bubble{max-width:80%;padding:.7rem 1rem;border-radius:14px;white-space:pre-wrap;line-height:1.45;font-size:.95rem}.bubble.assistant{align-self:flex-start;background:#fff;border:1px solid #e5e5e5;border-bottom-left-radius:4px}.bubble.user{align-self:flex-end;background:var(--gold);color:var(--navy);border-bottom-right-radius:4px}.bubble.loading{color:#999;font-style:italic}.bubble.error{align-self:center;background:#fdecea;color:#a12622;border:1px solid #f3c2bd;font-size:.85rem}.download-bar{display:flex;justify-content:center;padding-top:.5rem}.download-button{padding:.6rem 1.4rem;border:1px solid var(--navy);border-radius:999px;background:#fff;color:var(--navy);font-size:.9rem;cursor:pointer}.download-button:hover{background:var(--navy);color:#fff}.composer{display:flex;align-items:flex-end;gap:.5rem;padding:1rem 0;border-top:1px solid #e5e5e5;background:#fff;position:sticky;bottom:0}.composer textarea{flex:1;padding:.7rem 1rem;border:1px solid #ddd;border-radius:18px;font:inherit;font-size:.95rem;line-height:1.4;resize:none;max-height:12rem;overflow-y:auto}.composer textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px #cbac754d}.composer button{padding:.7rem 1.4rem;border:none;border-radius:999px;background:var(--navy);color:#fff;font-size:.95rem;cursor:pointer}.composer button:hover:not(:disabled){background:var(--navy-hover)}.composer button:disabled{background:#ccc;cursor:not-allowed}