/* ================================
   基本設定（フォント・色・リセット）
================================ */
:root {
  --bg: #f5f7fb;
  --fg: #1f2933;
  --accent: #2563eb;
  --border: #e1e7f0;
  --card-bg: #ffffff;

  --max-width: 960px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter",
               "Roboto", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
}

/* ================================
   ヘッダー（固定）
================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-nav a,
.lang-btn {
  margin-left: 1rem;
  text-decoration: none;
  color: var(--fg);
  font-size: 0.9rem;
}

.lang-btn {
  background: none;
  border: 1px solid var(--accent);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  color: var(--accent);
}

.lang-btn:hover {
  background: var(--accent);
  color: #fff;
}

/* ================================
   ヒーローセクション
================================ */
.hero {
  max-width: var(--max-width);
  margin: 2.5rem auto;
  padding: 2rem;
  background: radial-gradient(circle at top left, #e0ebff, #ffffff);
  border-radius: 16px;
  border: 1px solid var(--border);
}

.hero h1 {
  margin-top: 0;
  font-size: 2rem;
}

/* ================================
   セクション共通
================================ */
main {
  padding: 0 1.5rem 3rem;
}

h2 {
  max-width: var(--max-width);
  margin: 3rem auto 1rem;
}

/* ================================
   アプリカード
================================ */
.app-card-list {
  max-width: var(--max-width);
  margin: 0 auto 2rem;
  padding: 0;
  list-style: none;
}

.app-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.2rem;
  margin-bottom: 1rem;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.app-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
}

.app-card a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

/* ================================
   本文セクション
================================ */
.content-section {
  max-width: var(--max-width);
  margin: 2rem auto 3rem;
  padding: 0 1.5rem;
}

.content-section h2 {
  margin-top: 2rem;
  font-size: 1.2rem;
}

/* ================================
   フッター
================================ */
.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  font-size: 0.8rem;
}

/* ================================
   ハンバーガーメニュー
================================ */
.hamburger-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  font-size: 1.4rem;
  color: var(--fg);
  line-height: 1;
}

/* ================================
   モバイル対応
================================ */
@media (max-width: 640px) {
  .header-inner {
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
  }

  .js-enabled .hamburger-btn {
    display: inline-flex;
    align-items: center;
  }

  .js-enabled .site-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    background: rgba(255, 255, 255, 0.97);
    border-top: 1px solid var(--border);
    padding: 0.5rem 0;
  }

  .js-enabled .site-nav.open {
    display: flex;
  }

  .site-nav a,
  .lang-btn {
    margin-left: 0;
    margin-right: 0;
    padding: 0.55rem 1.5rem;
    font-size: 0.9rem;
    border-radius: 0;
    width: 100%;
    text-align: left;
  }

  .lang-btn {
    border: none;
    border-top: 1px solid var(--border);
    margin-top: 0.25rem;
    padding-top: 0.65rem;
  }

  .hero {
    padding: 1.25rem;
    margin: 1.25rem auto;
  }

  .hero h1 {
    font-size: 1.4rem;
  }

  main {
    padding: 0 1rem 2rem;
  }

  .content-section {
    padding: 0 0.5rem;
  }
}
/* ================================
   記事本文内のレスポンシブ対応
================================ */
.content-section img {
  max-width: 100%;
  height: auto;
}

.content-section table:not(.prop-table) {
  overflow-x: auto;
  display: block;
  max-width: 100%;
}

.content-section pre {
  overflow-x: auto;
  max-width: 100%;
}

/* ================================
   Control Reference Pages
   (apps/wpf-standard-control-demo)
================================ */
.prop-table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.prop-table th, .prop-table td { border: 1px solid var(--border); padding: 0.6rem 0.8rem; text-align: left; vertical-align: top; }
.prop-table th { background: #f0f4fb; font-weight: 600; }
.prop-table tr:hover { background: #f9fbff; }
.prop-table code { background: #eef2fb; padding: 1px 5px; border-radius: 3px; font-size: 0.85em; }

.category-badge { display: inline-block; background: var(--accent); color: #fff; font-size: 0.75rem; padding: 2px 8px; border-radius: 12px; margin-left: 0.5rem; vertical-align: middle; }
.screenshot-placeholder { background: #f0f4fb; border: 2px dashed var(--border); border-radius: 8px; padding: 2rem; text-align: center; color: #888; margin: 1rem 0; }
.screenshot-img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border); margin: 1rem 0; display: block; }

/* ================================
   セクション見出し（タイトル＋もっと見るリンク）
================================ */
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max-width);
  margin: 3rem auto 1rem;
}

.section-heading h2 {
  margin: 0;
  font-size: 1.4rem;
}

.more-link {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--accent);
  white-space: nowrap;
}

.more-link:hover {
  text-decoration: underline;
}

/* ================================
   記事グリッド・記事カード
================================ */
.article-grid {
  max-width: var(--max-width);
  margin: 0 auto 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.05);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.10);
}

.article-card a {
  display: block;
  text-decoration: none;
  color: inherit;
  height: 100%;
}

.article-card-body {
  padding: 1.2rem;
}

.article-meta {
  margin: 0 0 0.5rem;
  font-size: 0.82rem;
  color: #667085;
}

.article-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--fg);
}

.article-excerpt {
  margin: 0;
  font-size: 0.9rem;
  color: #475467;
  line-height: 1.65;
}

@media (max-width: 900px) {
  .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .section-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }
}