*,*:before,*:after{box-sizing:border-box}:root{--primary-color: #2563eb;--primary-hover: #1d4ed8;--bg-color: #f3f4f6;--text-dark: #1f2937;--text-muted: #6b7280;--danger: #ef4444;--border-color: #d1d5db}html,body{width:100%;max-width:100vw;overflow-x:hidden;margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background-color:var(--bg-color);color:var(--text-dark)}.login-container{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:1rem}.login-card{background:#fff;padding:2.5rem;border-radius:12px;box-shadow:0 10px 25px #0000000d;width:100%;max-width:400px}.text-center{text-align:center}.mt-3{margin-top:1rem}.w-100{width:100%}h2{margin:0 0 .5rem;color:var(--text-dark)}p{margin:0 0 1.5rem;color:var(--text-muted)}.form-group{margin-bottom:1.2rem;display:flex;flex-direction:column}label{font-size:.9rem;font-weight:600;margin-bottom:.4rem;color:var(--text-dark)}input{padding:.75rem;border:1px solid var(--border-color);border-radius:6px;font-size:1rem;transition:border-color .2s}input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #2563eb1a}input.is-invalid{border-color:var(--danger)}.error-text{color:var(--danger);font-size:.8rem;margin-top:.4rem}.alert-danger{background-color:#fef2f2;color:var(--danger);padding:.75rem;border-radius:6px;border:1px solid #fecaca;margin-bottom:1.5rem;text-align:center}button{cursor:pointer;border:none;font-size:1rem;font-weight:600}.btn-primary{background-color:var(--primary-color);color:#fff;padding:.75rem;border-radius:6px;transition:background-color .2s}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover)}.btn-primary:disabled{background-color:var(--text-muted);cursor:not-allowed;opacity:.7}