/* CSS Reset & Variables */
:root {
    --primary-color: #4285F4;
    --primary-hover-color: #357AE8;
    --neutral-color: #333;
    --background-color: #f4f4f9;
    --border-color: #ddd;
  }
  
  body, h1, p, a, form, input, button {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Open Sans', sans-serif;
    background-color: var(--background-color);
    color: var(--neutral-color);
  }
  
  /* Header Section */
  .header {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding: 0.625rem 1.25rem; /* 10px 20px */
  }
  
  .header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .nav a {
    margin-left: 1.25rem; /* 20px */
    text-decoration: none;
    color: var(--neutral-color);
    font-size: 0.875rem; /* 14px */
    transition: color 0.3s ease;
  }
  
  .nav a:hover {
    color: var(--primary-color);
  }
  
  /* Banner Section */
  .banner {
    background-color: var(--background-color);
    text-align: center;
    padding: 2.5rem 1.25rem; /* 40px 20px */
    border-bottom: 1px solid var(--border-color);
  }
  
  .banner h1 {
    font-size: 2rem; /* 32px */
    color: var(--primary-color);
    margin: 0;
  }
  
  /* Form Container */
  .form-container {
    background: #ffffff;
    margin: 1.25rem auto; /* 20px */
    padding: 1.25rem; /* 20px */
    border-radius: 0.5rem; /* 8px */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    text-align: center;
  }
  
  .form-container p {
    font-size: 0.875rem; /* 14px */
    color: #555;
    margin-bottom: 1.25rem; /* 20px */
  }
  
  form label {
    font-size: 0.875rem; /* 14px */
    color: #777;
    text-align: left;
    display: block;
    margin-bottom: 0.3125rem; /* 5px */
  }
  
  input[type="email"] {
    width: 100%;
    padding: 0.625rem; /* 10px */
    margin: 0.625rem 0; /* 10px 0 */
    border: 1px solid var(--border-color);
    border-radius: 0.3125rem; /* 5px */
    font-size: 0.875rem; /* 14px */
    background-color: #fafafa;
    transition: border-color 0.3s ease;
  }
  
  input[type="email"]:focus {
    outline: none;
    border-color: var(--primary-color);
  }
  
  button {
    background-color: var(--primary-color);
    color: #ffffff;
    padding: 0.625rem 0.9375rem; /* 10px 15px */
    font-size: 1rem; /* 16px */
    border: none;
    border-radius: 0.3125rem; /* 5px */
    cursor: pointer;
    width: 100%;
    margin-top: 0.625rem; /* 10px */
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: var(--primary-hover-color);
  }
  
  .logo {
    height: 80px;
    max-width: 100%;
    object-fit: contain;
  }