/* Tech News JP — Redesigned CSS */

/* ── Variables ── */
:root {
  --primary: #0066cc;
  --primary-dark: #004499;
  --primary-light: #e8f0fe;
  --text: #1a1a1a;
  --text-muted: #5f6368;
  --bg: #ffffff;
  --bg-alt: #f8f9fa;
  --bg-card: #ffffff;
  --border: #dadce0;
  --border-light: #f0f0f0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.1);
  --max-width: 1200px;
  --sidebar-width: 300px;
  --transition: 0.2s ease;

  /* Category accent colors */
  --cat-generative-ai: #d946ef;
  --cat-generative-ai-bg: #fdf2f8;
  --cat-windows: #0078d4;
  --cat-windows-bg: #e8f4fd;
  --cat-azure: #0089d6;
  --cat-azure-bg: #e6f3fb;
  --cat-m365: #d83b01;
  --cat-m365-bg: #fef0e8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #e8eaed;
    --text-muted: #9aa0a6;
    --bg: #1a1a2e;
    --bg-alt: #222240;
    --bg-card: #252545;
    --border: #3c3c5c;
    --border-light: #2a2a4a;
    --primary: #6ea8fe;
    --primary-dark: #9ec5fe;
    --primary-light: #1a2744;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);

    --cat-generative-ai: #e879f9;
    --cat-generative-ai-bg: #4a1942;
    --cat-windows: #60a5fa;
    --cat-windows-bg: #1e3a5f;
    --cat-azure: #67b8f0;
    --cat-azure-bg: #1a3650;
    --cat-m365: #f09060;
    --cat-m365-bg: #3d2215;
  }
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }

/* ── Header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,0.92);
}
@media (prefers-color-scheme: dark) {
  .site-header { background: rgba(26,26,46,0.92); }
}
.site-header .container {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-logo-icon { font-size: 1.3rem; }
.site-logo-text { letter-spacing: -0.02em; }

.site-nav {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
  margin-left: auto;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-icon { font-size: 1rem; }
.nav-link:hover { background: var(--bg-alt); color: var(--text); }
.nav-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.nav-link[data-category="generative-ai"].active { background: var(--cat-generative-ai-bg); color: var(--cat-generative-ai); }
.nav-link[data-category="windows"].active { background: var(--cat-windows-bg); color: var(--cat-windows); }
.nav-link[data-category="azure"].active { background: var(--cat-azure-bg); color: var(--cat-azure); }
.nav-link[data-category="m365"].active { background: var(--cat-m365-bg); color: var(--cat-m365); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  margin-left: auto;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: all var(--transition);
}

/* ── Layout (main + sidebar) ── */
.layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 2.5rem;
  padding-top: 1.5rem;
  padding-bottom: 3rem;
  align-items: start;
}
.main-content { min-width: 0; }

/* ── Sidebar ── */
.sidebar { position: sticky; top: 4rem; }
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.sidebar-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-light);
}
.sidebar-list { list-style: none; }
.sidebar-list li { margin-bottom: 0.5rem; }
.sidebar-list li:last-child { margin-bottom: 0; }
.sidebar-list a {
  color: var(--text);
  font-size: 0.875rem;
  line-height: 1.4;
  display: block;
}
.sidebar-list a:hover { color: var(--primary); }
.sidebar-cat { display: block; font-size: 0.7rem; color: var(--text-muted); margin-bottom: 0.15rem; }
.sidebar-cat-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.35rem 0;
}
.cat-count {
  background: var(--bg-alt);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  min-width: 2rem;
  text-align: center;
}

/* Owner */
.owner-card { text-align: center; }
.owner-name { font-weight: 700; font-size: 1rem; margin-bottom: 0.25rem; }
.owner-desc { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 2rem 0 2.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
}
.hero-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--primary), var(--cat-generative-ai));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  text-decoration: none;
  transition: all var(--transition);
  min-width: 120px;
}
.hero-stat:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.hero-stat[data-category="generative-ai"] { border-color: var(--cat-generative-ai-bg); }
.hero-stat[data-category="generative-ai"]:hover { background: var(--cat-generative-ai-bg); }
.hero-stat[data-category="windows"] { border-color: var(--cat-windows-bg); }
.hero-stat[data-category="windows"]:hover { background: var(--cat-windows-bg); }
.hero-stat[data-category="azure"] { border-color: var(--cat-azure-bg); }
.hero-stat[data-category="azure"]:hover { background: var(--cat-azure-bg); }
.hero-stat[data-category="m365"] { border-color: var(--cat-m365-bg); }
.hero-stat[data-category="m365"]:hover { background: var(--cat-m365-bg); }
.hero-stat-icon { font-size: 1.5rem; }
.hero-stat-name { font-size: 0.85rem; font-weight: 500; color: var(--text); }
.hero-stat-count { font-size: 0.75rem; color: var(--text-muted); }

/* ── Page Title ── */
.page-title { font-size: 1.5rem; margin-bottom: 1.25rem; font-weight: 700; }
.category-desc { color: var(--text-muted); margin-bottom: 1.5rem; font-size: 0.95rem; }

/* ── Category Section ── */
.category-section { margin-bottom: 2.5rem; }
.category-heading {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.15rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: 1rem;
}
.category-heading[data-category="generative-ai"] { border-bottom-color: var(--cat-generative-ai); }
.category-heading[data-category="windows"] { border-bottom-color: var(--cat-windows); }
.category-heading[data-category="azure"] { border-bottom-color: var(--cat-azure); }
.category-heading[data-category="m365"] { border-bottom-color: var(--cat-m365); }
.category-heading-icon { font-size: 1.2rem; }
.category-heading a { color: var(--text); text-decoration: none; font-weight: 700; }
.category-heading a:hover { color: var(--primary); }

/* ── Article Cards ── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.article-card {
  padding: 1.25rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  border-color: var(--border);
}
/* Category accent border-top */
.article-card[data-category="generative-ai"] { border-top: 3px solid var(--cat-generative-ai); }
.article-card[data-category="windows"] { border-top: 3px solid var(--cat-windows); }
.article-card[data-category="azure"] { border-top: 3px solid var(--cat-azure); }
.article-card[data-category="m365"] { border-top: 3px solid var(--cat-m365); }

.article-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.article-card--list {
  border: none;
  border-top: none;
  border-bottom: 1px solid var(--border-light);
  border-radius: 0;
  padding: 1rem 0;
}
.article-card--list:hover { transform: none; box-shadow: none; }

.article-category {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-light);
}
.article-category[data-category="generative-ai"] { color: var(--cat-generative-ai); background: var(--cat-generative-ai-bg); }
.article-category[data-category="windows"] { color: var(--cat-windows); background: var(--cat-windows-bg); }
.article-category[data-category="azure"] { color: var(--cat-azure); background: var(--cat-azure-bg); }
.article-category[data-category="m365"] { color: var(--cat-m365); background: var(--cat-m365-bg); }

.article-title { font-size: 0.95rem; line-height: 1.45; margin-bottom: 0.5rem; font-weight: 600; }
.article-title a { color: var(--text); text-decoration: none; }
.article-title a:hover { color: var(--primary); }
.article-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 0.5rem;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 0.75rem; align-items: center; }
.article-date { color: var(--text-muted); font-size: 0.75rem; }
.article-source { color: var(--text-muted); font-size: 0.75rem; }

.more-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.75rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: gap var(--transition);
}
.more-link:hover { gap: 0.6rem; }
.more-link-arrow { transition: transform var(--transition); }

/* ── Article Full ── */
.article-full { max-width: 760px; }
.article-header { margin-bottom: 2rem; }
.article-category-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  color: var(--primary);
  background: var(--primary-light);
}
.article-category-link[data-category="generative-ai"] { color: var(--cat-generative-ai); background: var(--cat-generative-ai-bg); }
.article-category-link[data-category="windows"] { color: var(--cat-windows); background: var(--cat-windows-bg); }
.article-category-link[data-category="azure"] { color: var(--cat-azure); background: var(--cat-azure-bg); }
.article-category-link[data-category="m365"] { color: var(--cat-m365); background: var(--cat-m365-bg); }

.article-title--full {
  font-size: 1.65rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.article-meta--full {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  gap: 1rem;
  align-items: center;
}
.article-meta--full time {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.article-meta--full svg { opacity: 0.6; }

.article-body { font-size: 1rem; line-height: 1.85; }
.article-body h2 { font-size: 1.25rem; margin: 2.5rem 0 0.75rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--border-light); }
.article-body h3 { font-size: 1.1rem; margin: 1.5rem 0 0.5rem; }
.article-body p { margin-bottom: 1rem; }
.article-body ul, .article-body ol { margin: 0.5rem 0 1rem 1.5rem; }
.article-body li { margin-bottom: 0.25rem; }
.article-body pre {
  background: var(--bg-alt);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1rem 0;
  font-size: 0.85rem;
  border: 1px solid var(--border-light);
}
.article-body code { background: var(--bg-alt); padding: 0.15em 0.4em; border-radius: 4px; font-size: 0.88em; }
.article-body pre code { background: none; padding: 0; }
.article-body blockquote {
  border-left: 3px solid var(--primary);
  padding: 0.75rem 1rem;
  color: var(--text-muted);
  margin: 1rem 0;
  background: var(--bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.article-body a { color: var(--primary); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; }
.article-body a:hover { text-decoration-thickness: 2px; }
.article-body img { max-width: 100%; height: auto; border-radius: var(--radius); }

/* Share buttons */
.share-buttons {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1.5rem 0;
  padding: 1rem 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.share-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  transition: all var(--transition);
}
.share-btn--x { background: #1a1a1a; color: #fff; }
.share-btn--x:hover { background: #333; color: #fff; }
.share-btn--hatena { background: #00a4de; color: #fff; }
.share-btn--hatena:hover { background: #008cbf; color: #fff; }
@media (prefers-color-scheme: dark) {
  .share-btn--x { background: #e0e0e0; color: #1a1a1a; }
  .share-btn--x:hover { background: #fff; }
}

.article-footer { margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--border); font-size: 0.9rem; }
.source-link a { color: var(--primary); }
.disclaimer { color: var(--text-muted); font-size: 0.8rem; margin-top: 0.5rem; font-style: italic; line-height: 1.6; }

/* ── Article Pager (prev/next) ── */
.article-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-light);
}
.pager-link {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  text-decoration: none;
  transition: all var(--transition);
}
.pager-link:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.pager-empty { border: none; }
.pager-label { font-size: 0.75rem; color: var(--text-muted); font-weight: 500; margin-bottom: 0.25rem; }
.pager-title { font-size: 0.875rem; color: var(--text); font-weight: 600; line-height: 1.4; }
.pager-next { text-align: right; }

/* ── Related Articles ── */
.related-articles { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-light); }
.related-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 1rem; }

/* ── Pagination ── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
}
.page-link {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.page-link:hover { background: var(--primary-light); }
.page-info { color: var(--text-muted); font-size: 0.9rem; }

/* ── Ad Units ── */
.ad-unit { margin: 1.5rem 0; }

/* ── Static Pages ── */
.static-page { max-width: 760px; }
.last-updated { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1.5rem; }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 1.5rem;
  margin-top: 2rem;
  background: var(--bg-alt);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-section h4 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.footer-section p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.footer-section ul { list-style: none; }
.footer-section li { margin-bottom: 0.4rem; }
.footer-section a { color: var(--text-muted); font-size: 0.85rem; text-decoration: none; }
.footer-section a:hover { color: var(--primary); }
.footer-bottom {
  text-align: center;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}
.footer-note { font-size: 0.75rem; margin-top: 0.25rem; }

/* ── Responsive ── */
@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
  .sidebar-widget { margin-bottom: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .site-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1rem;
    box-shadow: var(--shadow-md);
  }
  .site-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-link { padding: 0.6rem 0.75rem; }

  .hero-title { font-size: 1.5rem; }
  .hero-stats { gap: 0.5rem; }
  .hero-stat { min-width: 0; padding: 0.5rem 0.75rem; flex: 1; }

  .article-grid { grid-template-columns: 1fr; }
  .article-title--full { font-size: 1.3rem; }

  .article-pager { grid-template-columns: 1fr; }
  .pager-next { text-align: left; }

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

  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
}