html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  box-sizing: border-box;
  background-image: url('../Image/sasakiyushi01.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.App {
  text-align: center;
  padding: 20px;
  color: #333;
}

main {
  margin: 20px auto;
  max-width: 800px;
  text-align: left;
}

.company-info,
.contact-info,
.business-info,
.contact-form {
  margin-bottom: 20px;
  padding: 20px;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #f9f9f9;
}

address {
  font-style: normal;
}

form div {
  margin-bottom: 10px;
}

label {
  display: block;
  margin-bottom: 5px;
}

input,
textarea {
  width: 100%;
  padding: 8px;
  margin-bottom: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

/* おそらく以下は証明書用ボタンCSS button属性を直接操作するのはやめましょう */
/* button {
  padding: 10px 20px;
  color: white;
  background-color: #007BFF;
  border: none;
  border-radius: 4px;
  cursor: pointer;
} */

/* button:hover {
  background-color: #0056b3;
} */

footer {
  margin-top: 20px;
  padding: 10px;
  background-color: #282c34;
  color: white;
}

.download-container {
  max-width: 1200px;
  margin: 0 auto;
}

.download-section {
  background-color: #fff;
  border-radius: 8px;
  padding: 2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.download-section__title {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  color: #2b7fd9;
  border-bottom: 2px solid #2b7fd9;
  padding-bottom: 0.5rem;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.download-item {
  background-color: #e6f3ff;
  padding: 1rem;
  border-radius: 6px;
  transition: transform 0.3s ease;
}

.download-item:hover {
  transform: translateY(-3px);
}

.download-item_title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: #333;
}

.download-item_description {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: #333;
}

.download-button {
  display: inline-block;
  background-color: #2b7fd9;
  color: #fff;
  padding: 0.8rem 1.5rem;
  border-radius: 4px;
  text-decoration: none;
  transition: background-color 0.3s ease;
}

.download-button:hover {
  background-color: #1c6ac0;
}

@media (max-width: 768px) {
  .download-section {
    padding: 1.5rem;
  }

  .download-section__title {
    font-size: 1.5rem;
  }

  .download-grid {
    grid-template-columns: 1fr;
  }
}