/* 全体のリセット */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  background: url("https://images.unsplash.com/photo-1709880945165-d2208c6ad2ec?q=80&w=2070&auto=format&fit=crop&ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D")
    no-repeat center center fixed;
  background-size: cover;
  height: auto;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.8;
  background: linear-gradient(to bottom, #f9f9f9, #eaeaea);
  color: #444;
  padding: 20px;
  width: 600px;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  border-radius: 10px;
}

h2 {
  text-align: center;
  width: 100%;
  padding: 20px;
  background: #005bb5;
  color: #fff;
  border: 2px solid #fff;
  border-radius: 5px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

h3 {
  text-align: center;
  margin-bottom: 10px;
  color: #333;
}

header {
  background: #ec5628;
  color: #fff;
  padding: 10px 20px;
  text-align: center;
  border-radius: 5px;
}

header h1 {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

header p {
  font-size: 1rem;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 10px 0;
}

nav ul li {
  margin-bottom: 10px;
}

nav ul li a {
  text-decoration: none;
  color: #0078d7;
  font-weight: bold;
}

nav ul li a:hover {
  text-decoration: underline;
}

main {
  margin-top: 20px;
}

section {
  background: #fff;
  padding: 15px;
  margin-bottom: 20px;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

form {
  margin-top: 10px;
}

form label {
  display: inline-block;
  margin-right: 10px;
}

form input,
form select,
form button {
  width: 100%;
  padding: 8px;
  margin-bottom: 10px;
  border: 1px solid #ccc;
  border-radius: 5px;
}

form input[type="number"] {
  width: 100px;
}

form button {
  width: 100px;
  height: 50px;
  background-color: #0bbe32;
  color: #000;
  font-weight: bold;
}

form button:hover {
  background: #005bb5;
}

fieldset {
  border: 1px solid #ccc;
  padding: 15px;
  margin-bottom: 20px;
  border-radius: 5px;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

p span {
  font-weight: bold;
  color: #0078d7;
}

footer {
  text-align: center;
  margin-top: 20px;
}

footer a {
  text-decoration: none;
  color: #0078d7;
}

footer a:hover {
  text-decoration: underline;
}

.product {
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 15px;
  margin-bottom: 20px;
  background-color: #f9f9f9;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.product h3 {
  margin-bottom: 10px;
  font-size: 1.2rem;
  color: #333;
}

.product form {
  display: block;
  gap: 10px;
}

.product button {
  background-color: #0078d7;
  color: #fff;
  border: none;
  padding: 10px;
  border-radius: 5px;
  cursor: pointer;
}

.product button:hover {
  background-color: #005bb5;
}

.site-header {
  background: linear-gradient(to right, #ff7e5f, #feb47b);
  padding: 20px;
  text-align: center;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.highlight-title {
  font-size: 2.5rem;
  font-weight: bold;
  color: #fff;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
  margin-bottom: 10px;
}

.styled-menu {
  list-style: none;
  padding: 0;
  margin: 20px 0;
  background: #f4f4f4;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.styled-item {
  border-bottom: 1px solid #ddd;
  padding: 10px 20px;
}

.styled-item:last-child {
  border-bottom: none;
}

.styled-item a {
  text-decoration: none;
  color: #005bb5;
  font-weight: bold;
  display: block;
}

.styled-item a:hover {
  color: #ff7e5f;
}

.styled-submenu {
  list-style: none;
  padding: 10px 20px;
  margin: 10px 0;
  background: #fff;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.styled-subitem {
  padding: 5px 0;
}

.styled-subitem a {
  text-decoration: none;
  color: #0078d7;
}

.styled-subitem a:hover {
  text-decoration: underline;
}

.check_lb {
  display: block;
  margin-bottom: 10px;
}

.check_lb input[type="radio"] {
  margin-right: 5px;
  width: 10px;
}

button[type="submit"] {
  color: #000;
  background-color: #0bbe32;
  font-weight: bold;
}

@media screen and (max-width: 768px) {
  body {
    padding: 10px;
    width: 100%;
    max-width: none;
  }

  header,
  section,
  footer {
    padding: 10px;
  }

  form input,
  form select,
  form button {
    width: 100%;
    margin-bottom: 10px;
    box-sizing: border-box;
  }

  form input[type="number"],
  form input[type="text"] {
    width: 100%;
    font-size: 1rem;
    padding: 8px;
  }

  .product form {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  fieldset label {
    display: block;
    margin-bottom: 10px;
  }

  fieldset input[type="radio"] {
    margin-right: 5px;
  }
}