/*
 * enno.jp 静的ページ共通スタイル
 * public/ 以下の静的 HTML ファイル (help.html, whatsnew.html, terms.html,
 * term_20xx.html) から共通部分を切り出したスタイルシート。
 * Propshaft により /assets/public.css として配信される。
 */

/* ==================================================
 * ベーススタイル
 * ================================================== */

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #f9f9f9;
  margin: 0;
  padding: 0;
}

a {
  color: #4BA3F8;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  background-color: #f3f4f6;
  padding: 0.2rem 0.4rem;
  border-radius: 0.25rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}

/* ==================================================
 * レイアウト
 * ================================================== */

/* コンテナレイアウト (使い方・新着情報ページ) */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* サイドバーレイアウト (利用規約ページ) */
.layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background-color: #2c3e50;
  color: white;
  padding: 2rem 1rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar h2 {
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: 1.5rem;
  color: white;
}

.sidebar-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-menu li {
  margin-bottom: 0.5rem;
}

.sidebar-menu a {
  display: block;
  padding: 0.75rem 1rem;
  color: #ecf0f1;
  text-decoration: none;
  border-radius: 0.5rem;
  transition: background-color 0.3s;
}

.sidebar-menu a:hover {
  background-color: #34495e;
  text-decoration: none;
}

.sidebar-menu a.active {
  background-color: #4BA3F8;
  color: white;
  font-weight: 600;
}

.content {
  flex: 1;
  padding: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

/* 2カラムレイアウト */
.af-2column {
  display: flex;
  flex-direction: row;
  gap: 2rem;
  align-items: flex-start;
}

.af-2column > * {
  flex: 1;
  width: 50%;
}

/* ==================================================
 * タイポグラフィ
 * ================================================== */

h1 {
  font-size: 2rem;
  font-weight: bold;
  color: #1a1a1a;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: bold;
  color: #1a1a1a;
  margin-top: 2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #e5ebf0;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #333;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

h4, h5 {
  font-size: 1.25rem;
  font-weight: 600;
  color: #333;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

h6 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #555;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

p {
  line-height: 1.7;
  color: #4a5568;
  margin-bottom: 1rem;
}

ul, ol {
  line-height: 1.7;
  color: #4a5568;
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* ==================================================
 * コンポーネント
 * ================================================== */

.card {
  background: white;
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.note {
  background-color: #fef9c3;
  border-left: 4px solid #facc15;
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 0.25rem;
}

.warning {
  background-color: #fee2e2;
  border-left: 4px solid #ef4444;
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 0.25rem;
}

.info {
  background-color: #dbeafe;
  border-left: 4px solid #3b82f6;
  padding: 1rem;
  margin: 1rem 0;
  border-radius: 0.25rem;
}

.screenshot-placeholder {
  background: #e5ebf0;
  border: 2px dashed #9ca3af;
  padding: 3rem;
  text-align: center;
  color: #6b7280;
  border-radius: 0.5rem;
  margin: 1rem 0;
}

/* 規約バージョン切り替え (terms.html) */
.version-section {
  display: none;
}

.version-section.active {
  display: block;
}

/* 戻るリンク */
.back-link-container {
  position: sticky;
  bottom: 0;
  background: white;
  padding: 1.5rem;
  margin: 2rem -1.5rem 0;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  border-top: 1px solid #e5ebf0;
  text-align: center;
}

.back-link {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #4BA3F8;
  color: white;
  text-decoration: none;
  border-radius: 1rem;
  font-weight: 600;
  transition: background-color 0.3s;
}

.back-link:hover {
  background-color: #3D8AE9;
  text-decoration: none;
}

/* ==================================================
 * レスポンシブ
 * ================================================== */

@media (max-width: 768px) {
  .layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }

  .af-2column {
    flex-direction: column;
  }

  .af-2column > * {
    width: 100%;
  }
}