:root{
  --base-color: hsl(120 48% 38%);
  --bg-color: hsl(120 20% 96%);
}

body.theme-tsuki {
  background: var(--bg-color, #D5D4C3);
  margin: 0;
  color: #222;
}

body.theme-dark {
  background: var(--bg-color, #0a0a0a);
  margin: 0;
  color: #ffffff;
}

body.theme-dark .container-section {
  background: #1a1a1a;
  border-color: #333;
  color: #ffffff;
}

body.theme-dark .sidebar {
  background: #111111 !important;
  border-right-color: #333 !important;
}

body.theme-dark .home-link {
  color: #90ff90 !important;
}

body.theme-dark a {
  color: #90ff90;
}

body.theme-dark a:visited {
  color: #c9a9ff;
}

.layout {
  position: relative;
  min-height: 100vh;
}

.sidebar {
  display: none;
}

.main-content {
  margin: 2em auto;
  max-width: 700px;
  min-width: 0;
  box-sizing: border-box;
  position: relative;
}

/* 個別のセクションコンテナ */
.container-section {
  background: #fff;
  border: 2px solid #444;
  margin-bottom: 1.5em;
  padding: 2em;
  box-sizing: border-box;
  position: relative;
}

/* 最初のセクションの上マージンを調整 */
.container-section:first-child {
  margin-top: 0;
}

/* 最後のセクションの下マージンを調整 */
.container-section:last-child {
  margin-bottom: 0;
}

.home-top, .home-bottom {
  text-align: left;
  margin: 1em 0;
  display: none;
}

.theme-toggle {
  background: none;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 0.3em 0.5em;
  cursor: pointer;
  font-size: 0.9em;
  margin-bottom: 1em;
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  background: rgba(0, 0, 0, 0.1);
}

body.theme-dark .theme-toggle {
  border-color: #333;
  color: #ffffff;
}

body.theme-dark .theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.mobile-only {
  display: none;
}

.home-link {
  display: block;
  font-weight: bold;
  margin-bottom: 1.5em;
  text-decoration: none;
  color: var(--base-color, #090);
}

.toc {
  font-size: 0.95em;
  line-height: 1.6;
}

/* サイドバーありの画面用 */
@media (min-width: 800px) {
  .sidebar {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 20vw;
    min-width: 200px;
    max-width: 280px;
    height: 100vh;
    overflow-y: auto;
    background: #f8f8f8;
    border-right: 2px solid #ccc;
    padding: 2em 1em;
    box-sizing: border-box;
    z-index: 10;
  }
  
  .main-content {
    position: relative;
    margin: 2em auto;
    margin-left: calc(20vw + 2em);
    margin-left: clamp(calc(200px + 2em + 2em), calc(20vw + 2em), calc(280px + 2em + 2em));
    margin-right: auto;
    width: calc(100vw - clamp(calc(200px + 2em + 2em), calc(20vw + 2em), calc(280px + 2em + 2em)) - 2em);
    max-width: 800px;
    padding: 0;
  }
}

/* 大画面では本文を中央寄せ */
@media (min-width: 1400px) {
  .main-content {
    margin-left: max(calc(20vw + 2em), calc(50vw - 400px));
    margin-left: max(clamp(calc(200px + 2em + 2em), calc(20vw + 2em), calc(280px + 2em + 2em)), calc(50vw - 400px));
    width: auto;
    max-width: 800px;
  }
}

/* タブレット・スマホ画面用 */
@media (max-width: 799px) {
  .sidebar {
    display: none;
  }
  .main-content {
    position: static;
    margin: 1em;
    padding: 0;
    max-width: none;
    width: auto;
  }
  
  .container-section {
    padding: 1em;
  }
  
  .home-top, .home-bottom {
    display: block;
    margin: 1em 0;
    padding: 0 1em;
  }
  
  .home-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .mobile-only {
    display: inline-block;
  }
}
table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.6em 0;
}
table th, table td {
  border: 1px solid rgba(0,0,0,0.08);
  padding: 0.5em 0.6em;
  text-align: left;
  background: rgba(255,255,255,0.02);
}
table th { font-weight: bold; }
pre, code {
  font-family: Consolas, 'Courier New', monospace;
  background: rgba(0,0,0,0.03);
  color: inherit;
}
pre {
  padding: 0.8em;
  overflow: auto;
  border-radius: 6px;
  margin: 0.8em 0;
  border: 1px solid rgba(0,0,0,0.06);
}
code {
  padding: 0.12em 0.25em;
  border-radius: 3px;
  background: rgba(0,0,0,0.02);
  font-size: 0.95em;
}