:root {
  --bg: #0f1115;
  --surface: #171a21;
  --surface-2: #1f242d;
  --text: #e6e8ec;
  --text-dim: #9aa3af;
  --accent: #4f9cf9;
  --accent-2: #38bdf8;
  --border: #2a303a;
  --radius: 12px;
  --maxw: 760px;
  --font: system-ui, -apple-system, 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(15, 17, 21, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  padding-bottom: 14px;
}
.brand {
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
}
.site-header nav {
  display: flex;
  gap: 16px;
  font-size: 0.92rem;
}
.site-header nav a {
  color: var(--text-dim);
}
.nav-tools {
  color: var(--accent-2) !important;
  font-weight: 600;
}

/* Hero */
.hero {
  padding: 48px 0 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.hero h1 {
  font-size: 1.8rem;
  margin: 0 0 12px;
}
.hero p {
  color: var(--text-dim);
  margin: 0;
}

main.container {
  min-height: 60vh;
  padding-top: 8px;
  padding-bottom: 64px;
}

/* Post list */
.post-list {
  display: grid;
  gap: 16px;
}
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s, transform 0.15s;
}
.post-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.post-card-link {
  display: block;
  padding: 20px 22px;
  color: inherit;
}
.post-card-link:hover {
  text-decoration: none;
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 8px;
}
.post-card-title {
  font-size: 1.2rem;
  margin: 0 0 8px;
  line-height: 1.5;
}
.post-card-desc {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin: 0;
}

.category-badge {
  display: inline-block;
  background: var(--surface-2);
  color: var(--accent-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Post */
.post {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
}
.breadcrumb {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}
.post-header h1 {
  font-size: 1.7rem;
  line-height: 1.45;
  margin: 12px 0;
}
.post-meta {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0 0 8px;
}
.post-body {
  margin-top: 28px;
}
.post-body h2 {
  font-size: 1.35rem;
  margin: 40px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}
.post-body h3 {
  font-size: 1.12rem;
  margin: 28px 0 10px;
}
.post-body p {
  margin: 14px 0;
}
.post-body ul,
.post-body ol {
  padding-left: 1.4em;
}
.post-body li {
  margin: 6px 0;
}
.post-body img {
  max-width: 100%;
  border-radius: 8px;
}
.post-body code {
  background: var(--surface-2);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 0.88em;
}
.post-body pre {
  background: #0b0d12 !important;
  padding: 16px;
  border-radius: 10px;
  overflow-x: auto;
  border: 1px solid var(--border);
}
.post-body pre code {
  background: none;
  padding: 0;
}
.post-body blockquote {
  border-left: 3px solid var(--accent);
  margin: 16px 0;
  padding: 4px 16px;
  color: var(--text-dim);
  background: var(--surface-2);
  border-radius: 0 8px 8px 0;
}
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.92rem;
}
.post-body th,
.post-body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.post-body th {
  background: var(--surface-2);
}

/* Affiliate box (inline in article body) */
.aff-box {
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 28px 0;
}
.aff-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}
.aff-note {
  font-size: 0.88rem;
  margin: 4px 0 10px;
  line-height: 1.5;
}
.aff-btn {
  display: inline-block;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 20px;
  border-radius: 6px;
  text-decoration: none !important;
  transition: opacity 0.15s, transform 0.1s;
  margin-top: 4px;
}
.aff-btn:hover {
  opacity: 0.88;
  transform: translateY(-1px);
  text-decoration: none !important;
}

/* Amazon box */
.aff-amazon {
  background: linear-gradient(135deg, rgba(255,153,0,0.08) 0%, rgba(255,153,0,0.03) 100%);
  border: 1px solid rgba(255,153,0,0.35);
  border-left: 4px solid #FF9900;
}
.aff-amazon .aff-label {
  color: #FF9900;
}
.aff-product {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 4px;
  line-height: 1.5;
}
.aff-amazon .aff-note {
  color: var(--text-dim);
}
.aff-amazon .aff-btn {
  background: #FF9900;
  color: #111;
}

/* A8 box */
.aff-a8 {
  background: linear-gradient(135deg, rgba(79,156,249,0.08) 0%, rgba(56,189,248,0.03) 100%);
  border: 1px solid rgba(79,156,249,0.3);
  border-left: 4px solid var(--accent);
}
.aff-a8 .aff-label {
  color: var(--accent-2);
}
.aff-a8 a:not(.aff-btn) {
  display: inline-block;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 10px 20px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none !important;
  transition: opacity 0.15s, transform 0.1s;
  margin-top: 4px;
}
.aff-a8 a:not(.aff-btn):hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* Persistent CTA block (shown on every post page) */
.post-cta {
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 32px 0;
  background: linear-gradient(135deg, rgba(79,156,249,0.05) 0%, rgba(56,189,248,0.03) 100%);
}
.post-cta-heading {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 16px;
}
.post-cta-items {
  display: grid;
  gap: 12px;
}
.post-cta-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
}
.post-cta-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 4px;
  letter-spacing: 0.04em;
}
.post-cta-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 2px 0 10px;
}
.post-cta-link a {
  display: inline-block;
  color: var(--text);
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--accent);
  padding: 8px 16px;
  border-radius: 6px;
  text-decoration: none;
  transition: opacity 0.15s;
}
.post-cta-link a:hover {
  opacity: 0.85;
  text-decoration: none;
}
.post-cta-more {
  text-align: right;
  margin: 14px 0 0;
  font-size: 0.85rem;
}

/* Share buttons */
.share-buttons {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.share-label {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0 0 12px;
  font-weight: 600;
}
.share-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none !important;
  transition: opacity 0.15s, transform 0.1s;
}
.share-btn:hover {
  opacity: 0.85;
  transform: translateY(-1px);
}
.share-btn--x {
  background: #000;
  color: #fff;
}
.share-btn--hatena {
  background: #00a4de;
  color: #fff;
}
.share-btn--line {
  background: #06c755;
  color: #fff;
}

/* Tags */
.post-tags {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-size: 0.82rem;
  color: var(--text-dim);
  background: var(--surface-2);
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  color: var(--text-dim);
  font-size: 0.85rem;
}
.site-footer nav {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}
.site-footer .disclosure {
  font-size: 0.78rem;
  opacity: 0.8;
}

.intro {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 28px;
}
.intro p {
  margin: 0 0 12px;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.cat-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.9rem;
}
.section-title {
  font-size: 1.2rem;
  margin: 0 0 4px;
}

.cat-nav-tools {
  color: var(--accent-2) !important;
  font-weight: 600;
}

/* Homepage CTA section */
.home-cta {
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 22px 22px 16px;
  margin-bottom: 32px;
}
.home-cta-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-2);
  margin: 0 0 16px;
  letter-spacing: 0.04em;
}
.home-cta-grid {
  display: grid;
  gap: 12px;
}
@media (min-width: 560px) {
  .home-cta-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}
.home-cta-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
}
.home-cta-item--featured {
  border-color: var(--accent);
}
.home-cta-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-2);
  margin-bottom: 4px;
}
.home-cta-item p {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0 0 10px;
}
.home-cta-item a {
  display: inline-block;
  color: var(--text);
  font-weight: 700;
  font-size: 0.88rem;
  background: var(--accent);
  padding: 6px 12px;
  border-radius: 5px;
  text-decoration: none;
  transition: opacity 0.15s;
}
.home-cta-item a:hover {
  opacity: 0.85;
  text-decoration: none;
}
.home-cta-more {
  text-align: right;
  margin: 14px 0 0;
  font-size: 0.88rem;
}

.related {
  margin-top: 40px;
}
.related h2 {
  font-size: 1.25rem;
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
}

.empty {
  color: var(--text-dim);
  text-align: center;
  padding: 48px 0;
}

@media (max-width: 600px) {
  .hero h1 {
    font-size: 1.45rem;
  }
  .post {
    padding: 22px 18px;
  }
}

/* ========================================
   Wide layout (一覧・トップ専用)
   ======================================== */
body.wide .container {
  max-width: 1160px;
}

/* ========================================
   Hero (トップ)
   ======================================== */
.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.hero-tags span {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* ========================================
   Category nav cards
   ======================================== */
.cat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin: 28px 0;
}
.cat-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--cat-color, var(--accent));
  border-radius: var(--radius);
  text-decoration: none !important;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
}
.cat-card:hover {
  background: var(--surface-2);
  transform: translateY(-2px);
  text-decoration: none;
}
.cat-card--tools {
  --cat-color: #fbbf24;
}
.cat-card-emoji {
  font-size: 1.6rem;
  line-height: 1;
  margin-bottom: 4px;
}
.cat-card-label {
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.4;
}
.cat-card-count {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ========================================
   Post grid
   ======================================== */
.post-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}
@media (min-width: 600px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 960px) {
  .post-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ========================================
   Post card — 共通
   ======================================== */
.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
}
.post-card:hover {
  border-color: var(--cat-color, var(--accent));
  transform: translateY(-3px);
}
.post-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
  text-decoration: none !important;
}
.post-card-link:hover {
  text-decoration: none;
}

/* サムネ（疑似アイキャッチ） */
.post-card-thumb {
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--cat-color, var(--accent)) 30%, var(--surface-2)),
    color-mix(in srgb, var(--cat-color, var(--accent)) 10%, var(--bg))
  );
  display: flex;
  align-items: center;
  justify-content: center;
  height: 90px;
  flex-shrink: 0;
}
.post-card-emoji {
  font-size: 2.2rem;
  line-height: 1;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4));
}

/* カード本文エリア */
.post-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 16px 18px 18px;
  gap: 6px;
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--text-dim);
}
.post-card-title {
  font-size: 1rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.5;
  flex: 1;
}
.post-card-desc {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin: 0;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}
.post-card-tag {
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--surface-2);
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.post-card-readmore {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cat-color, var(--accent));
  margin-top: auto;
  padding-top: 8px;
}

/* category-badge にカテゴリ色を適用 */
.category-badge {
  border-color: color-mix(in srgb, var(--cat-color, var(--accent)) 60%, transparent) !important;
  color: var(--cat-color, var(--accent-2)) !important;
}

/* ========================================
   Featured card (注目記事 大カード)
   ======================================== */
.featured-wrap {
  margin-bottom: 24px;
}
.post-card--featured {
  border-top: 3px solid var(--cat-color, var(--accent));
}
.post-card--featured .post-card-link {
  flex-direction: row;
}
.post-card--featured .post-card-thumb {
  width: 220px;
  height: auto;
  min-height: 140px;
  flex-shrink: 0;
}
.post-card--featured .post-card-emoji {
  font-size: 3rem;
}
.post-card--featured .post-card-body {
  padding: 22px 24px;
}
.post-card--featured .post-card-title {
  font-size: 1.25rem;
}
.post-card--featured .post-card-desc {
  -webkit-line-clamp: 3;
}
@media (max-width: 640px) {
  .post-card--featured .post-card-link {
    flex-direction: column;
  }
  .post-card--featured .post-card-thumb {
    width: 100%;
    height: 90px;
  }
}

/* ========================================
   List head (カテゴリ・タグ一覧ページ)
   ======================================== */
.list-head {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 0 28px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 28px;
}
.list-head-emoji {
  font-size: 3rem;
  line-height: 1;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--cat-color, var(--accent)) 30%, var(--surface-2)),
    color-mix(in srgb, var(--cat-color, var(--accent)) 10%, var(--bg))
  );
  border-radius: 16px;
  flex-shrink: 0;
}
.list-head--tag .list-head-emoji {
  font-size: 2rem;
  color: var(--accent-2);
  background: var(--surface-2);
  border: 2px solid var(--border);
}
.list-head-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin: 0 0 4px;
}
.list-head h1 {
  font-size: 1.6rem;
  margin: 0 0 4px;
  line-height: 1.3;
}
.list-head-count {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin: 0;
}

/* ========================================
   Section title
   ======================================== */
.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.post-feed {
  margin-top: 32px;
}