:root{--primary:#2563eb;--primary-hover:#1d4ed8;--bg-color:#f3f4f6;--surface:#fff;--text-main:#1f2937;--text-muted:#6b7280;--border:#e5e7eb;--error:#ef4444;--shadow:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;--shadow-sm:0 1px 2px 0 #0000000d;--radius:.5rem}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-main);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.5}.btn{border-radius:var(--radius);cursor:pointer;border:1px solid #0000;justify-content:center;align-items:center;padding:.5rem 1rem;font-size:.875rem;font-weight:500;transition:all .2s;display:inline-flex}.btn:disabled{opacity:.7;cursor:not-allowed}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn-block{width:100%}.form-group{margin-bottom:1rem}label{color:var(--text-main);margin-bottom:.25rem;font-size:.875rem;font-weight:500;display:block}input[type=email],input[type=password],input[type=text]{border:1px solid var(--border);border-radius:var(--radius);width:100%;padding:.5rem .75rem;font-size:.875rem;transition:border-color .2s}input:focus{border-color:var(--primary);outline:none;box-shadow:0 0 0 3px #2563eb1a}.login-container{justify-content:center;align-items:center;min-height:100vh;padding:1rem;display:flex}.login-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);width:100%;max-width:400px;padding:2.5rem}.login-card h1{text-align:center;margin-bottom:.5rem;font-size:1.5rem}.subtitle{color:var(--text-muted);text-align:center;margin-bottom:2rem;font-size:.875rem}.error-message{color:var(--error);border-radius:var(--radius);background-color:#fef2f2;border:1px solid #fecaca;margin-bottom:1.5rem;padding:.75rem;font-size:.875rem}