@charset "UTF-8";

/*==================== COMMON ====================*/
body {
  font-family: 'Montserrat', 'Noto Sans JP', sans-serif;
  color: #333;
  background-color: #F4F4F4;
  letter-spacing: .05em;
}

* {
  margin: 0;
  padding: 0;
}

a {
  text-decoration: none;
}

li {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  vertical-align: bottom;
}

/*==================== LAYOUT ====================*/
.wrapper {
  max-width: 1000px;
  margin: 0 auto;
}

/*==================== LAYOUT - MOBILE ====================*/
@media (max-width: 768px) {
  .wrapper {
    width: 100%;
  }
}

/*==================== HEADER ====================*/
#header {
  width: 100%;
  padding: 20px 0;
  position: fixed;
  right: 0;
  z-index: 10;
  background-color: rgba(252, 252, 252, .9); 
}

.header-active {
  height: 30px;
  background-color: rgba(255, 255, 255, .9);
  box-shadow: 0 3px 6px rgb(0 0 0 / 5%);
}

#header .nav {
  display: flex;
  justify-content: flex-end;
  padding: 0 1em;
}

#header .nav .nav_list {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

#header .nav .nav_item {
  padding-left: 30px;
}

#header .nav .nav_item a {
  font-size: 10px;
  font-weight: bold;
  letter-spacing: .1em;
  color: #333;
}

#header .nav .nav_item a:hover {
  color: #DFDFDF;
}

#header .nav .nav_item a:hover {
  opacity: .7;
}

#header .nav .nav_item i {
  font-size: 16px;
  color: rgb(30, 48, 80);
}

/*==================== MAIN ====================*/
.main {
  padding-top: 100px;
}

/*==================== SECTION ====================*/
.section {
  max-width: 860px;
  margin-inline: auto;
  padding-bottom: 100px;
  padding-right: 1em;
  padding-left: 1em;
}

.article_title {
  font-size: 32px;
  width: fit-content;
  margin-inline: auto;
}

.article_content {
  padding-top: 24px;
}

.article_img:hover,
.article_link a:hover,
.github a:hover {
  opacity: .7;
}

.article_url {
  font-size: 18px;
  padding-top: 20px;
}

.article_link {
  display: inline-block;
  padding-top: 8px;
}

.article_link a {
  color: #333;
  font-weight: bold;
}

.github {
  display: block;
  width: 20px;
  height: 20px;
  padding-top: 16px;
}

.github a {
  color: #333;
}

.fa-brands {
  font-size: 20px;
}

.article_desc {
  color: #333;
  padding-top: 24px;
  line-height: 1.7;
}

/*==================== SECTION - TABLET ====================*/
@media (max-width: 768px) {
  .section {
    padding-bottom: 80px;
  }

  .article_title {
    font-size: 28px;
  }

  .article_url {
    font-size: 16px;
    padding-top: 20px;
  }

  .article_link a {
    font-size: 15px;
  }

  .article_desc {
    font-size: 15px;
  }
}

/*==================== SECTION - MOBILE ====================*/
@media (max-width: 425px) {
  .section {
    padding-bottom: 50px;
  }

  .article_title {
    font-size: 24px;
  }
}

/*==================== FOOTER ====================*/
#footer {
  background-color: #DFDFDF;
}

#footer .copyright {
  text-align: center;
  padding: 40px;
  font-size: 12px;
  letter-spacing: 0.05em;
}

/*==================== FOOTER - MOBILE ====================*/
@media (max-width: 425px) {
  #footer .copyright {
    padding: 30px;
    font-size: 11px;
  }
}