:root{
      --brand:#d32f2f;
      --muted:#6c757d;
      --surface:#ffffff;
    }
    body {
      background: linear-gradient(180deg, #fbfbfd 0%, #f3f4f6 100%);
      min-height:100vh;
      display:flex;
      align-items:center;
      justify-content:center;
      font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    }

    .auth-card {
      width:100%;
      max-width:980px;
      border-radius:12px;
      overflow:hidden;
      display:grid;
      grid-template-columns: 1fr;
      box-shadow: 0 10px 30px rgba(13, 110, 253, 0.06);
      background: var(--surface);
    }

    /* on larger screens show side image */
    @media (min-width: 992px) {
      .auth-card { grid-template-columns: 420px 1fr; }
    }

    .auth-visual {
      background-size: cover;
      background-position: center;
      background-size: contain;
      background-repeat: no-repeat;
      padding: 32px;
      display:flex;
      flex-direction:column;
      justify-content:center;
      color: #fff;
    }
    .brand {
      color: #fff;
      font-weight:700;
      font-size:1.25rem;
    }
    .visual-title { font-size:1.35rem; font-weight:700; margin-top:14px; color:#fff; text-shadow: 0 2px 12px rgba(0,0,0,0.18); }
    .visual-sub { color: rgba(255,255,255,0.9); margin-top:6px; font-size:0.95rem; opacity:0.95; }

    .auth-form {
      padding: 28px;
    }

    .social-btn {
      border-radius:10px;
      display:flex;
      align-items:center;
      gap:.75rem;
    }
    .social-google { background:#fff; color:#222; border:1px solid #e9e9e9; }
    .social-github { background:#111; color:#fff; border:1px solid rgba(255,255,255,0.06); }

    .divider {
      display:flex; align-items:center; gap:12px; color:var(--muted);
    }
    .divider::before, .divider::after {
      content:""; height:1px; background:#e9ecef; flex:1;
    }

    .form-note { font-size:.88rem; color:var(--muted); }

    .footer-line { margin-top:14px; font-size:.88rem; color:var(--muted); }

    .btn-brand { background: var(--brand); border-color: var(--brand); color:#fff; }
    .btn-brand:hover { background:#b92a2a; border-color:#b92a2a; }

    /* small adjustments */
    .form-control:focus { box-shadow: 0 0 0 0.15rem rgba(211,47,47,0.08); border-color: var(--brand); }
    .card-body { padding: 0; }