* {
      box-sizing: border-box;
    }

    body, html {
      height: 100%;
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
    }

    body {
      background: url('https://images.unsplash.com/photo-1521737711867-e3b97375f902?auto=format&fit=crop&w=1920&q=80') no-repeat center center fixed;
      background-size: cover;
      display: flex;
      justify-content: center;
      align-items: center;
      position: relative;
    }

    body::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(0, 0, 0, 0.55); /* escurece a imagem */
      z-index: 0;
    }

    .login-card {
      position: relative;
      z-index: 1;
      background: rgba(255, 255, 255, 0.1);
      backdrop-filter: blur(15px);
      border-radius: 16px;
      padding: 40px 30px;
      width: 100%;
      max-width: 400px;
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
      color: #fff;
      animation: slideIn 1s ease forwards;
    }

    @keyframes slideIn {
      0% { transform: translateY(50px); opacity: 0; }
      100% { transform: translateY(0); opacity: 1; }
    }

    .login-card .logo {
      text-align: center;
      margin-bottom: 25px;
    }

    .login-card .logo img {
      width: 70px;
      transition: transform 0.3s ease;
    }

    .login-card .logo img:hover {
      transform: scale(1.05);
    }

    .login-card h6 {
      margin-top: 10px;
      color: #eee;
      font-weight: 300;
    }

    .form-group {
      position: relative;
      margin-bottom: 1.5rem;
    }

    .form-control {
      background: rgba(255, 255, 255, 0.15);
      border: none;
      color: #fff;
      padding-left: 2.5rem;
    }

    .form-control::placeholder {
      color: #ddd;
    }

    .form-group i {
      position: absolute;
      top: 50%;
      left: 10px;
      transform: translateY(-50%);
      color: #ccc;
    }

    .btn-login {
      width: 100%;
      background-color: #ff4d4d;
      color: white;
      border: none;
      font-weight: 500;
      transition: background-color 0.3s ease;
    }

    .btn-login:hover {
      background-color: #e63946;
    }

    .erro {
      font-size: 0.9rem;
      color: #ffd166;
      margin-bottom: 10px;
    }

    .headline {
      font-size: 1rem;
      text-align: center;
      color: #f1f1f1;
      margin-bottom: 20px;
      font-style: italic;
    }

    .login-card a {
      color: #fff;
      font-size: 0.9rem;
      text-decoration: underline;
      display: block;
      text-align: center;
      margin-top: 10px;
    }