:root{--bg:#faf7f2;--card:#fff;--ink:#2b2622;--muted:#7a6f66;--accent:#8a5a44;--accent2:#c9a98f;--line:#e8dfd5;--ok:#4f7a5a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 Georgia,Times New Roman,serif}a{color:var(--accent);text-decoration:none}nav{display:flex;gap:20px;align-items:center;padding:14px 24px;border-bottom:1px solid var(--line);background:var(--card);flex-wrap:wrap}nav .brand{font-weight:700;margin-right:auto}main{max-width:860px;margin:0 auto;padding:28px 20px 80px}h1{font-size:28px;margin:0 0 6px}h2{font-size:20px;margin:28px 0 10px}.muted{color:var(--muted);font-size:14px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:12px 0}.locked{opacity:.55}.bar{height:10px;background:var(--line);border-radius:99px;overflow:hidden;margin:8px 0}.bar>i{display:block;height:100%}.bar>i,.btn,button{background:var(--accent)}.btn,button{color:#fff;border:0;border-radius:8px;padding:10px 18px;font:inherit;cursor:pointer;display:inline-block}button.sec{background:transparent;color:var(--accent);border:1px solid var(--accent2)}input,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;background:#fff;margin:6px 0 12px}textarea{min-height:90px}.video{position:relative;padding-bottom:56.25%;height:0;border-radius:12px;overflow:hidden;background:#000}.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.err{color:#a33}.ok{color:var(--ok)}.chat{display:flex;flex-direction:column;gap:10px}.msg{padding:10px 14px;border-radius:12px;white-space:pre-wrap;max-width:90%}.msg.user{background:var(--accent2);align-self:flex-end}.msg.ai{background:var(--card);border:1px solid var(--line)}