@charset "utf-8";
/* CSS Document */
/* =========================================
   Reset & Base
========================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1.7;
  color: #333;
  background-color: #fff;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.4;
}

/* =========================================
   Layout
========================================= */
header {
	display: flex;
	justify-content: space-around;
  background: #f5f7f8;
  padding: 3rem 1rem;
}

header h1 {
  font-size: 1.8rem;
  margin-bottom: 0.8rem;
}

header p {
  font-size: 1rem;
  color: #555;
}

section {
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 1rem;
}

section h2 {
  font-size: 1.4rem;
  border-left: 5px solid #78b3a4;
  padding-left: 0.6rem;
  margin-bottom: 1.2rem;
}

section p {
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

footer {
  text-align: center;
  padding: 2rem 1rem;
  background: #f5f5f5;
  font-size: 0.85rem;
  color: #777;
}

/* =========================================
   Utility
========================================= */
strong {
  font-weight: 700;
}

/* =========================================
   Responsive Design
========================================= */

/* タブレット (768px〜) */
@media (min-width: 768px) {
  header {
    padding: 4rem 1rem;
  }

  header h1 {
    font-size: 2.2rem;
  }

  header p {
    font-size: 1.1rem;
  }

  section h2 {
    font-size: 1.6rem;
  }

  section p {
    font-size: 1.05rem;
  }
}

/* PC (1024px〜) */
@media (min-width: 1024px) {
  header {
    padding: 5rem 1rem;
  }

  header h1 {
    font-size: 2.6rem;
  }

  header p {
    font-size: 1.2rem;
  }

  section {
    margin: 4rem auto;
  }

  section h2 {
    font-size: 1.8rem;
  }

  section p {
    font-size: 1.1rem;
  }

  footer {
    font-size: 0.9rem;
  }
}