body {
      background: linear-gradient(135deg, #e0f7fa, #b2ebf2); /* soft blue gradient */
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: 'Arial', sans-serif;
      position: relative;
      overflow: hidden;
    }

    /* PSPA background text */
    .background-text {
      position: absolute;
      top: 10%;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(0, 77, 64, 0.15); /* soft green for visibility */
      font-size: 4rem;
      font-weight: bold;
      text-align: center;
      pointer-events: none;
      user-select: none;
      white-space: nowrap;
    }
    .background-subtext {
      position: absolute;
      top: 18%;
      left: 50%;
      transform: translateX(-50%);
      color: rgba(0, 77, 64, 0.25);
      font-size: 1.5rem;
      font-weight: 500;
      pointer-events: none;
      user-select: none;
    }

    .login-container {
      background: rgba(255, 255, 255, 0.95);
      padding: 30px;
      border-radius: 15px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
      width: 100%;
      max-width: 400px;
      position: relative;
      z-index: 2;
    }

    .login-container h3 {
      color: #00796b; /* soft teal for title */
      font-weight: bold;
    }

    .btn-danger {
      background-color: #00796b; /* match soft teal */
      border: none;
    }

    .btn-danger:hover {
      background-color: #004d40;
    }

    .alert {
      border-radius: 10px;
    }