@charset "UTF-8";
:root {
  --main-color: #ff7300; /* メインカラー */
  --font: '\f02d'; /* アイコン */

  --color-hover: var(--main-color);
  --text-color: #333333; /* 基本文字色 */
  --text-light: #666666; /* 薄い文字色 */
  --text-lighter: #999999; /* より薄い文字色 */
  --bg-color: #ffffff; /* 背景色 */
  --bg-light: #fafafa; /* 薄い背景色 */
  --border-color: #e0e0e0; /* ボーダー色 */
  --border-light: #f0f0f0; /* 薄いボーダー色 */
  --shadow-light: rgba(0, 0, 0, 0.05);
  --shadow-medium: rgba(0, 0, 0, 0.1);
  --shadow-heavy: rgba(0, 0, 0, 0.15);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans JP', sans-serif;
  line-height: 1.7;
  color: var(--text-color);
  background-color: var(--bg-light);
  font-size: 16px;
}

/* Container */
.wrapper {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header Styles */
header {
  background: var(--bg-color);
  box-shadow: 0 2px 4px var(--shadow-light);
  margin-bottom: 20px;
  position: relative;
}

.sitetitle {
  line-height: 1.3;
  padding: 25px 20px;
  font-size: 26px;
  font-weight: 700;
  color: #ffffff;
  border-bottom: 1px solid var(--border-light);
  position: relative;
  position: absolute;
  height: 180px;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  text-shadow: 0 0 10px var(--main-color);
  border-top: 10px solid var(--main-color);
  z-index: 1;
}
.sitetitle a {
  color: #ffffff;
  text-decoration: none;
  transition: all 0.2s ease;
}
.sitetitle a:hover {
  opacity: 0.7;
}

.mainvisual {
  text-align: center;
  overflow: hidden;
  background: var(--bg-light);
}

.mainvisual img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  object-position: center;
  vertical-align: middle;
}

/* Main Content Layout */
main {
  background: var(--bg-color);
  border-radius: 6px;
  box-shadow: 0 1px 3px var(--shadow-light);
  margin-bottom: 30px;
  overflow: hidden;
}

.main_content {
  display: flex;
  gap: 30px;
  padding: 30px;
}

.content {
  flex: 2;
}

.sidebar {
  flex: 1;
  max-width: 280px;
}

/* Breadcrumbs */
.breadcrumbs {
  list-style: none;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 15px 30px;
  background: rgb(from var(--main-color) r g b / 0.1);
  border-bottom: 1px solid var(--border-light);
  font-size: 16px;
  line-height: 1.3;
}

.breadcrumbs li {
  display: inline;
}

.breadcrumbs li:not(:last-child)::after {
  content: '>';
  margin: 0 6px;
  color: var(--text-lighter);
  font-size: 16px;
}

.breadcrumbs a {
  color: var(--main-color);
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.breadcrumbs a:hover {
  opacity: 0.7;
}

.breadcrumbs li:last-child span,
.breadcrumbs li:last-child {
  color: var(--text-light);
}

/* Headings */
h1.underheading {
  font-size: 22px;
  margin-bottom: 25px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--main-color);
  position: relative;
}

h1.underheading span {
  font-weight: 700;
  color: var(--text-color);
}

/* Article List (Top Page) */
.article_list {
  list-style: none;
}

.article_list > li {
  margin-bottom: 25px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all 0.2s ease;
  overflow: hidden;
  position: relative;
}

.article_list > li:hover::before {
  opacity: 0.5;
}

.article_list > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--main-color);
  transition: opacity 0.2s ease;
}

.article_list .page_link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.article_list dl {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px;
  flex-direction: column;
}

.article_list dt {
  font-size: 20px;
  font-weight: 600;
  color: var(--main-color);
  margin-bottom: 8px;
  line-height: 1.5;
  transition: opacity 0.2s ease;
}

.article_list dd {
  flex: 1;
  font-weight: normal;
  display: flex;
}

.article_list .cap {
  flex-shrink: 0;
  width: 240px;
  height: 160px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  margin-bottom: 16px;
}

.article_list .cap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin: 0;
}

.article_list dd span {
  color: var(--text-light);
  font-size: 16px;
  line-height: 1.6;
  padding-left: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Category List (Category Page) */
.category_list {
  list-style: none;
}

.category_list > li {
  margin-bottom: 20px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  transition: all 0.2s ease;
  overflow: hidden;
  position: relative;
}

.category_list > li:hover::before {
  opacity: 0.5;
}

.category_list > li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--main-color);
  transition: opacity 0.2s ease;
}

.category_list .page_link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.category_list dl {
  display: flex;
  gap: 15px;
  padding: 18px;
  flex-direction: column;
}

.category_list dt {
  flex: 1;
  font-size: 20px;
  font-weight: 600;
  color: var(--main-color);
  margin-bottom: 8px;
  line-height: 1.5;
  transition: opacity 0.2s ease;
}

.category_list dd {
  display: flex;
  font-weight: normal;
}

.category_list .cap {
  width: 240px;
  height: 160px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-light);
  flex-shrink: 0;
  margin-bottom: 8px;
  border: 1px solid var(--border-light);
}

.category_list .cap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin: 0;
}

.category_list dd span {
  color: var(--text-light);
  font-size: 16px;
  line-height: 1.6;
  padding-left: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Article Content (Single Page) */
.content p {
  margin-bottom: 16px;
  line-height: 1.8;
  font-size: 16px;
  color: var(--text-color);
}

.content a {
  color: var(--main-color);
  text-decoration: underline;
  text-decoration-color: var(--main-color);
  transition: opacity 0.2s ease;
  font-weight: 500;
}

.content a:hover {
  opacity: 0.7;
}

.content img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  margin: 16px 0;
  border: 1px solid var(--border-light);
}

/* Sidebar */
.sidebar {
  background: var(--bg-color);
  border-radius: 6px;
  height: fit-content;
  border: 1px solid var(--border-color);
}

.sidelist dt {
  background: var(--main-color);
  color: white;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: 6px 6px 0 0;
  margin-bottom: 0;
}

.sidelist dd {
  background: var(--bg-color);
  border-radius: 0 0 6px 6px;
}

.sidelist .list {
  list-style: none;
}

.sidelist .list li {
  border-bottom: 1px solid var(--border-light);
}

.sidelist .list li:last-child {
  border-bottom: none;
}

.sidelist .list a {
  display: block;
  padding: 12px 16px 12px 25px;
  color: var(--main-color);
  text-decoration: none;
  font-size: 16px;
  transition: all 0.2s ease;
  position: relative;
  line-height: 1.3;
}

.sidelist .list a:before {
  content: '▶';
  font-size: 50%;
  left: 10px;
  position: absolute;
  top: calc(50% - 5px);
}

.sidelist .list a:hover {
  opacity: 0.7;
}

/* Footer */
footer {
  background: rgb(from var(--main-color) r g b / 0.7);
  color: white;
  padding: 20px 0;
  text-align: center;
  margin-top: 40px;
}

.inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.copyright {
  font-size: 16px;
}

.copyright a {
  color: white;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.copyright a:hover {
  opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
  .wrapper {
    padding: 0 0;
  }

  .sitetitle {
    font-size: 22px;
    padding: 20px 20px;
    height: 140px;
  }

  .mainvisual img {
    height: 140px;
  }

  .main_content {
    flex-direction: column;
    padding: 20px;
    gap: 25px;
  }

  .sidebar {
    max-width: unset;
  }

  .breadcrumbs {
    padding: 12px 20px;
    font-size: 16px;
  }

  h1.underheading {
    font-size: 18px;
  }

  /* Article List Mobile */
  .article_list dl {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .article_list .cap {
    width: 100%;
    height: 160px;
    order: -1;
  }

  .article_list dt {
    font-size: 17px;
  }
  .article_list dd {
    flex-direction: column;
  }
  .article_list dd span {
    padding-left: 0;
  }

  /* Category List Mobile */
  .category_list dl {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .category_list .cap {
    width: 100%;
    height: 140px;
    margin-bottom: 12px;
  }

  .category_list dt {
    font-size: 16px;
  }
  .category_list dd {
    flex-direction: column;
  }
  .category_list dd span {
    padding-left: 0;
  }

  .content p {
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .sitetitle {
    font-size: 20px;
    padding: 18px 20px;
  }

  .main_content {
    padding: 16px;
  }

  .article_list dl,
  .category_list dl {
    padding: 14px;
  }

  .article_list dt,
  .category_list dt {
    font-size: 16px;
  }

  .sidebar {
    margin-top: 20px;
  }
}
.sitetitle a:before,
.sidelist dt:before {
  font-family: 'Font Awesome 5 Free' !important;
  content: var(--font);
  padding-right: 0.5em;
}
h1.underheading span:before {
  color: var(--main-color);
  font-family: 'Font Awesome 5 Free' !important;
  content: var(--font);
  padding-right: 0.5em;
}