 body {
      margin: 0;
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: url('https://images.unsplash.com/photo-1500534623283-312aade485b7?auto=format&fit=crop&w=1470&q=80') no-repeat center center fixed;
      background-size: cover;
    }

    .container {
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
    }

    .login-card, .profile-card {
      background: white;
      padding: 2rem;
      border-radius: 12px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.1);
      width: 100%;
      max-width: 400px;
      text-align: center;
    }

    h2 {
      margin-bottom: 1.5rem;
    }

    .social-btn {
      width: 100%;
      padding: 0.8rem;
      margin-bottom: 1rem;
      border: none;
      border-radius: 8px;
      font-weight: bold;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
    }

    .google {
      background-color: white;
      border: 1px solid #ccc;
    }

    .apple {
      background-color: black;
      color: white;
    }

    .divider {
      text-align: center;
      margin: 1rem 0;
      position: relative;
    }

    .divider::before, .divider::after {
      content: "";
      position: absolute;
      top: 50%;
      width: 40%;
      height: 1px;
      background-color: #ccc;
    }

    .divider::before {
      left: 0;
    }

    .divider::after {
      right: 0;
    }

    .divider span {
      padding: 0 10px;
      background-color: white;
      position: relative;
      z-index: 1;
    }

    input {
      width: 100%;
      padding: 0.8rem;
      margin: 0.5rem 0;
      border: 1px solid #ccc;
      border-radius: 8px;
    }

    .login-btn {
      background-color: #d93025;
      color: white;
      width: 100%;
      padding: 0.8rem;
      border: none;
      border-radius: 8px;
      font-weight: bold;
      margin-top: 1rem;
    }

    .links {
      display: flex;
      justify-content: space-between;
      font-size: 0.9rem;
      margin-top: 0.5rem;
    }

    .links a {
      color: #1a73e8;
      text-decoration: none;
    }

    .loader {
      width: 40px;
      height: 40px;
      border: 4px solid #ccc;
      border-top: 4px solid #d93025;
      border-radius: 50%;
      animation: spin 1s linear infinite;
      margin: 1rem auto 0;
      display: none;
    }

    @keyframes spin {
      0% { transform: rotate(0deg); }
      100% { transform: rotate(360deg); }
    }

    #profile img {
      width: 100px;
      border-radius: 50%;
      margin-bottom: 1rem;
    }