:root{--bg:#ffffff;--bg-subtle:#f4faf6;--green:#1f7a46;--green-dark:#145c34;--green-pale:#e6f4ea;--yellow:#f6c445;--yellow-dark:#d9a521;--text:#16241c;--text-muted:#5b6b62;--border:#dbe7df;--danger:#c0392b;--radius:10px}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif}a{color:var(--green)}.page-center{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(180deg,var(--bg-subtle),var(--bg) 60%);padding:24px}.card{width:100%;max-width:380px;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:0 1px 3px rgba(20,92,52,.06)}.brand{display:flex;align-items:center;gap:10px;margin-bottom:4px}.brand-mark{width:10px;height:28px;background:var(--yellow);border-radius:3px;flex-shrink:0}.brand h1{font-size:20px;margin:0;color:var(--green-dark)}.subtitle{color:var(--text-muted);margin:4px 0 24px;font-size:14px}.form-stack{display:flex;flex-direction:column;gap:12px}.field{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;background:var(--bg);color:var(--text)}.field:focus{outline:2px solid var(--green);outline-offset:1px;border-color:var(--green)}.btn{border:none;border-radius:8px;padding:10px 16px;font-size:14px;font-weight:600;cursor:pointer;transition:background-color .15s ease,border-color .15s ease,color .15s ease}.btn-primary{background:var(--green);color:#ffffff}.btn-primary:hover:not(:disabled){background:var(--green-dark)}.btn-primary:disabled{opacity:.6;cursor:default}.btn-secondary{background:var(--bg);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--green);color:var(--green-dark)}.btn-block{width:100%}.error-text{color:var(--danger);font-size:13px;margin:0}.helper-link{margin-top:20px;font-size:14px;color:var(--text-muted);text-align:center}.helper-link a{font-weight:600;text-decoration:none}.helper-link a:hover{text-decoration:underline}.divider{display:flex;align-items:center;gap:10px;margin:18px 0;color:var(--text-muted);font-size:12px}.divider:after,.divider:before{content:"";flex:1 1;height:1px;background:var(--border)}.app-shell{min-height:100vh;background:var(--bg-subtle)}.app-header{background:var(--green);padding:16px 24px;display:flex;align-items:center;justify-content:space-between}.app-header,.app-header .brand h1{color:#ffffff}.app-main{max-width:720px;margin:0 auto;padding:32px 24px}.profile-line{color:var(--text-muted);font-size:14px;margin-top:4px}.chat-form{display:flex;gap:8px;margin-top:24px}.answer-card{margin-top:24px;padding:20px;background:var(--bg);border-radius:var(--radius);border:1px solid var(--border);border-left:4px solid var(--yellow)}.answer-meta{color:var(--text-muted);font-size:12px;margin-top:8px}.btn-ghost{background:transparent;color:#ffffff;border:1px solid rgba(255,255,255,.5)}.btn-ghost:hover{background:rgba(255,255,255,.14)}