/* ==========================================================================
   Seiryu-Theme — Main Style
   CSS Custom Properties / Reset / Layout / Utilities / Buttons / Forms
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (デザイントークン)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --seiryu-color-primary:         #1a3a5c;
  --seiryu-color-primary-light:   #2563a8;
  --seiryu-color-secondary:       #e85d26;
  --seiryu-color-secondary-light: #f07847;
  --seiryu-color-bg:              #ffffff;
  --seiryu-color-bg-alt:          #f7f8fa;
  --seiryu-color-bg-dark:         #0f1e2e;
  --seiryu-color-text:            #1a1a1a;
  --seiryu-color-text-muted:      #6b7280;
  --seiryu-color-text-inverse:    #ffffff;
  --seiryu-color-border:          #e2e8f0;

  /* Typography */
  --seiryu-font-heading: 'Noto Serif JP', 'Georgia', serif;
  --seiryu-font-body:    'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  --seiryu-font-mono:    'SFMono-Regular', 'Consolas', monospace;

  --seiryu-text-xs:   0.75rem;
  --seiryu-text-sm:   0.875rem;
  --seiryu-text-base: 1rem;
  --seiryu-text-lg:   1.125rem;
  --seiryu-text-xl:   1.25rem;
  --seiryu-text-2xl:  1.5rem;
  --seiryu-text-3xl:  1.875rem;
  --seiryu-text-4xl:  2.25rem;
  --seiryu-text-5xl:  3rem;
  --seiryu-text-6xl:  3.75rem;
  --seiryu-text-7xl:  4.5rem;

  /* Spacing (8px grid) */
  --seiryu-space-1:  0.25rem;
  --seiryu-space-2:  0.5rem;
  --seiryu-space-3:  0.75rem;
  --seiryu-space-4:  1rem;
  --seiryu-space-6:  1.5rem;
  --seiryu-space-8:  2rem;
  --seiryu-space-12: 3rem;
  --seiryu-space-16: 4rem;
  --seiryu-space-20: 5rem;
  --seiryu-space-24: 6rem;
  --seiryu-space-32: 8rem;

  /* Border Radius */
  --seiryu-radius-sm:   4px;
  --seiryu-radius-md:   8px;
  --seiryu-radius-lg:   16px;
  --seiryu-radius-xl:   24px;
  --seiryu-radius-full: 9999px;

  /* Shadows */
  --seiryu-shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --seiryu-shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --seiryu-shadow-lg: 0 8px 32px rgba(0,0,0,0.18);

  /* Motion */
  --seiryu-duration-fast:  0.2s;
  --seiryu-duration-base:  0.4s;
  --seiryu-duration-slow:  0.7s;
  --seiryu-duration-hero:  1.0s;
  --seiryu-easing-default: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --seiryu-easing-out:     cubic-bezier(0.0, 0.0, 0.2, 1.0);
  --seiryu-easing-spring:  cubic-bezier(0.34, 1.56, 0.64, 1.0);

  /* Breakpoints (reference only — use in media queries) */
  --seiryu-bp-sm:  640px;
  --seiryu-bp-md:  768px;
  --seiryu-bp-lg:  1024px;
  --seiryu-bp-xl:  1280px;
  --seiryu-bp-2xl: 1536px;
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--seiryu-font-body);
  font-size: var(--seiryu-text-base);
  line-height: 1.7;
  color: var(--seiryu-color-text);
  background-color: var(--seiryu-color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
video,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--seiryu-color-primary);
  text-decoration: underline;
  transition: color var(--seiryu-duration-fast) var(--seiryu-easing-default);
}

a:hover {
  color: var(--seiryu-color-secondary);
}

:focus-visible {
  outline: 2px solid var(--seiryu-color-secondary);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--seiryu-font-heading);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--seiryu-color-text);
}

h1 { font-size: clamp(var(--seiryu-text-4xl), 5vw, var(--seiryu-text-5xl)); line-height: 1.2; }
h2 { font-size: clamp(var(--seiryu-text-3xl), 4vw, var(--seiryu-text-4xl)); }
h3 { font-size: clamp(var(--seiryu-text-2xl), 3vw, var(--seiryu-text-3xl)); }
h4 { font-size: var(--seiryu-text-2xl); font-weight: 600; }
h5 { font-size: var(--seiryu-text-xl);  font-weight: 600; }
h6 { font-size: var(--seiryu-text-lg);  font-weight: 600; }

/* コンテンツエリア内の見出しスタイル */
.entry-content h1,
.entry-content h2,
.entry-content h3,
.entry-content h4,
.entry-content h5,
.entry-content h6 {
  margin-top: var(--seiryu-space-12);
  margin-bottom: var(--seiryu-space-4);
}

.entry-content :is(h1, h2, h3, h4, h5, h6):first-child {
  margin-top: 0;
}

/* H2 — ボトムグラデーションアクセントライン */
.entry-content h2 {
  position: relative;
  padding-bottom: var(--seiryu-space-3);
  border-bottom: 1px solid var(--seiryu-color-border);
}
.entry-content h2::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 3em;
  height: 3px;
  background: linear-gradient(90deg, var(--seiryu-color-primary), var(--seiryu-color-secondary));
  border-radius: var(--seiryu-radius-full);
}

/* H3 — 左アクセントバー */
.entry-content h3 {
  padding-left: var(--seiryu-space-4);
  border-left: 4px solid var(--seiryu-color-primary);
  margin-top: var(--seiryu-space-8);
}

/* H4 — ブランドカラー強調 */
.entry-content h4 {
  color: var(--seiryu-color-primary);
}

/* H5, H6 — ミュートラベルスタイル */
.entry-content h5,
.entry-content h6 {
  color: var(--seiryu-color-text-muted);
}

.entry-content h6 {
  font-size: var(--seiryu-text-base);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

p { margin-bottom: var(--seiryu-space-4); }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.5em; }
li { margin-bottom: var(--seiryu-space-2); }

/* --------------------------------------------------------------------------
   4. Layout / Container
   -------------------------------------------------------------------------- */
.seiryu-container {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: var(--seiryu-space-6);
}

.seiryu-container--wide   { max-width: 1400px; }
.seiryu-container--narrow { max-width: 800px; }

.seiryu-page-wrap { overflow-x: clip; }

/* --------------------------------------------------------------------------
   5. Section
   -------------------------------------------------------------------------- */
.seiryu-section {
  padding-block: var(--seiryu-space-20);
}

.seiryu-section--alt {
  background-color: var(--seiryu-color-bg-alt);
}

.seiryu-section--dark {
  background-color: var(--seiryu-color-bg-dark);
  color: var(--seiryu-color-text-inverse);
}

.seiryu-section-title {
  font-size: var(--seiryu-text-4xl);
  margin-bottom: var(--seiryu-space-4);
  text-align: center;
}

.seiryu-section-subtitle {
  font-size: var(--seiryu-text-lg);
  color: var(--seiryu-color-text-muted);
  text-align: center;
  margin-bottom: var(--seiryu-space-12);
}

/* --------------------------------------------------------------------------
   6. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--seiryu-space-2);
  padding: 0.75em 1.75em;
  font-family: var(--seiryu-font-body);
  font-size: var(--seiryu-text-base);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  border-radius: var(--seiryu-radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background-color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    border-color var(--seiryu-duration-fast) var(--seiryu-easing-default),
    transform var(--seiryu-duration-fast) var(--seiryu-easing-default),
    box-shadow var(--seiryu-duration-fast) var(--seiryu-easing-default);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--seiryu-shadow-md);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn--primary {
  background-color: var(--seiryu-color-primary);
  color: var(--seiryu-color-text-inverse);
  border-color: var(--seiryu-color-primary);
}

.btn--primary:hover {
  background-color: var(--seiryu-color-primary-light);
  border-color: var(--seiryu-color-primary-light);
  color: var(--seiryu-color-text-inverse);
}

.btn--secondary {
  background-color: var(--seiryu-color-secondary);
  color: var(--seiryu-color-text-inverse);
  border-color: var(--seiryu-color-secondary);
}

.btn--secondary:hover {
  background-color: var(--seiryu-color-secondary-light);
  border-color: var(--seiryu-color-secondary-light);
  color: var(--seiryu-color-text-inverse);
}

.btn--outline {
  background-color: transparent;
  color: var(--seiryu-color-primary);
  border-color: var(--seiryu-color-primary);
}

.btn--outline:hover {
  background-color: var(--seiryu-color-primary);
  color: var(--seiryu-color-text-inverse);
}

.btn--ghost {
  background-color: transparent;
  color: var(--seiryu-color-text-inverse);
  border-color: var(--seiryu-color-text-inverse);
}

.btn--ghost:hover {
  background-color: rgba(255,255,255,0.15);
  color: var(--seiryu-color-text-inverse);
}

/* Block editor button overrides */
.wp-block-button__link.is-style-ghost {
  background-color: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.wp-block-button__link.is-style-pill {
  border-radius: var(--seiryu-radius-full);
}

.wp-block-button__link.is-style-arrow::after {
  content: ' →';
}

/* --------------------------------------------------------------------------
   7. Forms
   -------------------------------------------------------------------------- */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="search"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-family: var(--seiryu-font-body);
  font-size: var(--seiryu-text-base);
  color: var(--seiryu-color-text);
  background-color: var(--seiryu-color-bg);
  border: 1px solid var(--seiryu-color-border);
  border-radius: var(--seiryu-radius-sm);
  transition: border-color var(--seiryu-duration-fast) var(--seiryu-easing-default),
              box-shadow var(--seiryu-duration-fast) var(--seiryu-easing-default);
  appearance: none;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--seiryu-color-primary);
  box-shadow: 0 0 0 3px rgba(26,58,92,0.15);
}

/* Search form */
.search-form {
  display: flex;
  gap: var(--seiryu-space-2);
}

.search-form input[type="search"] {
  flex: 1;
}

.search-submit {
  padding: 0.625rem 1.25rem;
  background-color: var(--seiryu-color-primary);
  color: #fff;
  border: none;
  border-radius: var(--seiryu-radius-sm);
  cursor: pointer;
  font-family: var(--seiryu-font-body);
  font-size: var(--seiryu-text-base);
  transition: background-color var(--seiryu-duration-fast) var(--seiryu-easing-default);
}

.search-submit:hover {
  background-color: var(--seiryu-color-primary-light);
}

/* --------------------------------------------------------------------------
   8. Accessibility
   -------------------------------------------------------------------------- */
.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
  word-wrap: normal !important;
}

.seiryu-skip-link {
  position: absolute;
  top: -100px;
  left: var(--seiryu-space-4);
  z-index: 9999;
  padding: var(--seiryu-space-3) var(--seiryu-space-6);
  background: var(--seiryu-color-primary);
  color: #fff;
  text-decoration: none;
  border-radius: var(--seiryu-radius-sm);
  transition: top var(--seiryu-duration-fast);
}

.seiryu-skip-link:focus {
  top: var(--seiryu-space-4);
}

/* --------------------------------------------------------------------------
   9. Post Card Grid (ブログ・アーカイブ)
   -------------------------------------------------------------------------- */
.seiryu-blog-wrap {
  padding-block: var(--seiryu-space-16);
}

.seiryu-post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: var(--seiryu-space-8);
}

.seiryu-post-card {
  background: var(--seiryu-color-bg);
  border-radius: var(--seiryu-radius-md);
  overflow: hidden;
  box-shadow: var(--seiryu-shadow-sm);
  transition: box-shadow var(--seiryu-duration-fast) var(--seiryu-easing-default),
              transform var(--seiryu-duration-fast) var(--seiryu-easing-default);
  display: flex;
  flex-direction: column;
}

.seiryu-post-card:hover {
  box-shadow: var(--seiryu-shadow-md);
  transform: translateY(-4px);
}

.post-card-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  display: block;
}

.post-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--seiryu-duration-slow) var(--seiryu-easing-default);
}

.seiryu-post-card:hover .post-card-thumb img {
  transform: scale(1.04);
}

.post-card-body {
  padding: var(--seiryu-space-6);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.post-card-meta {
  font-size: var(--seiryu-text-sm);
  color: var(--seiryu-color-text-muted);
  margin-bottom: var(--seiryu-space-3);
  display: flex;
  gap: var(--seiryu-space-3);
  flex-wrap: wrap;
}

.post-card-title {
  font-size: var(--seiryu-text-xl);
  margin-bottom: var(--seiryu-space-3);
  line-height: 1.4;
}

.post-card-title a {
  color: var(--seiryu-color-text);
  text-decoration: none;
}

.post-card-title a:hover {
  color: var(--seiryu-color-primary);
}

.post-card-excerpt {
  font-size: var(--seiryu-text-sm);
  color: var(--seiryu-color-text-muted);
  margin-top: auto;
}

/* Pagination */
.nav-links {
  display: flex;
  gap: var(--seiryu-space-2);
  justify-content: center;
  margin-top: var(--seiryu-space-12);
  flex-wrap: wrap;
}

.page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--seiryu-radius-sm);
  font-size: var(--seiryu-text-sm);
  text-decoration: none;
  color: var(--seiryu-color-text);
  border: 1px solid var(--seiryu-color-border);
  transition: background-color var(--seiryu-duration-fast) var(--seiryu-easing-default),
              color var(--seiryu-duration-fast) var(--seiryu-easing-default);
}

.page-numbers:hover,
.page-numbers.current {
  background-color: var(--seiryu-color-primary);
  color: #fff;
  border-color: var(--seiryu-color-primary);
}

/* --------------------------------------------------------------------------
   10. Single Post
   -------------------------------------------------------------------------- */
.seiryu-single-wrap {
  padding-block: var(--seiryu-space-16);
}

.seiryu-single-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--seiryu-space-12);
}

@media (min-width: 1024px) {
  .seiryu-single-layout:has(.seiryu-sidebar) {
    grid-template-columns: 1fr 300px;
  }

  /* 左サイドバーレイアウト */
  .seiryu-single-layout--sidebar-left:has(.seiryu-sidebar) {
    grid-template-columns: 300px 1fr;
  }
}

/* 全幅テンプレート */
.seiryu-page-content--full {
  width: 100%;
}

.seiryu-page-content--full .entry-content {
  max-width: none;
}

/* 全幅テンプレート内のデフォルトブロックに左右パディングを付与 */
.seiryu-page-content--full .entry-content > * {
  padding-inline: var(--seiryu-space-6);
  box-sizing: border-box;
}

/* alignfull・alignwide はパディングなしで全幅まで広がる */
.seiryu-page-content--full .entry-content > .alignfull {
  padding-inline: 0;
  width: 100vw;
  margin-inline: calc(50% - 50vw);
}

.seiryu-page-content--full .entry-content > .alignwide {
  padding-inline: 0;
  max-width: var(--wp--style--global--wide-size, 1400px);
  margin-inline: auto;
}

/* デフォルト・幅広テンプレートでの alignfull 全幅ブレークアウト */
.seiryu-container .entry-content > .alignfull {
  padding-inline: 0;
  width: 100vw;
  margin-inline: calc(50% - 50vw);
}

.seiryu-article {}

.article-header { margin-bottom: var(--seiryu-space-8); }

.article-meta {
  font-size: var(--seiryu-text-sm);
  color: var(--seiryu-color-text-muted);
  margin-bottom: var(--seiryu-space-4);
  display: flex;
  gap: var(--seiryu-space-4);
  flex-wrap: wrap;
}

.article-title {
  font-size: clamp(var(--seiryu-text-3xl), 4vw, var(--seiryu-text-5xl));
}

.article-thumbnail {
  margin-bottom: var(--seiryu-space-8);
  border-radius: var(--seiryu-radius-md);
  overflow: hidden;
}

.article-thumbnail img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.article-content {
  max-width: 75ch;
}

.article-content > * + * {
  margin-top: var(--seiryu-space-6);
}

.article-footer { margin-top: var(--seiryu-space-8); }

.article-tags { font-size: var(--seiryu-text-sm); }

.article-author {
  display: flex;
  gap: var(--seiryu-space-4);
  align-items: flex-start;
  padding: var(--seiryu-space-8);
  background: var(--seiryu-color-bg-alt);
  border-radius: var(--seiryu-radius-md);
  margin-top: var(--seiryu-space-12);
}

.article-author img {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  flex-shrink: 0;
}

.author-name { font-weight: 700; margin-bottom: var(--seiryu-space-1); }
.author-bio  { font-size: var(--seiryu-text-sm); color: var(--seiryu-color-text-muted); margin: 0; }

.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--seiryu-space-4);
  margin-top: var(--seiryu-space-12);
}

.nav-previous, .nav-next { font-size: var(--seiryu-text-sm); }
.nav-next { text-align: right; }
.nav-label { display: block; color: var(--seiryu-color-text-muted); margin-bottom: var(--seiryu-space-1); }
.nav-title { color: var(--seiryu-color-text); font-weight: 600; }

/* --------------------------------------------------------------------------
   11. Page Title Banner
   -------------------------------------------------------------------------- */
.seiryu-page-banner {
  display: flex;
  align-items: center;
  min-height: 240px;
  background-color: var(--seiryu-color-primary);
  background-size: cover;
  background-position: center;
  color: var(--seiryu-color-text-inverse);
  padding-block: var(--seiryu-space-12);
}

.seiryu-archive-banner { min-height: 200px; }

.page-banner-title {
  color: var(--seiryu-color-text-inverse);
  font-size: clamp(var(--seiryu-text-2xl), 4vw, var(--seiryu-text-5xl));
  margin-bottom: var(--seiryu-space-3);
}

.archive-description {
  color: rgba(255,255,255,0.8);
  font-size: var(--seiryu-text-lg);
}

/* Breadcrumbs */
.seiryu-breadcrumbs {
  font-size: var(--seiryu-text-sm);
  color: rgba(255,255,255,0.75);
  margin-top: var(--seiryu-space-3);
}

.seiryu-breadcrumbs__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--seiryu-space-1);
}

.seiryu-breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: var(--seiryu-space-1);
}

.seiryu-breadcrumbs a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color 0.2s;
}
.seiryu-breadcrumbs a:hover { color: #fff; }

.seiryu-breadcrumbs__sep {
  color: rgba(255,255,255,0.4);
  font-size: var(--seiryu-text-xs);
}

.seiryu-breadcrumbs__item--current span {
  color: rgba(255,255,255,0.55);
  max-width: 20em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: bottom;
}

/* --------------------------------------------------------------------------
   12. 404
   -------------------------------------------------------------------------- */
.seiryu-404-wrap {
  padding-block: var(--seiryu-space-32);
  text-align: center;
}

.seiryu-404-content { max-width: 600px; margin-inline: auto; }

.error-code {
  font-size: clamp(5rem, 20vw, 10rem);
  font-family: var(--seiryu-font-heading);
  font-weight: 700;
  line-height: 1;
  color: var(--seiryu-color-border);
  margin-bottom: var(--seiryu-space-4);
}

.error-title {
  font-size: var(--seiryu-text-3xl);
  margin-bottom: var(--seiryu-space-4);
}

.error-description {
  color: var(--seiryu-color-text-muted);
  margin-bottom: var(--seiryu-space-8);
}

.error-search {
  max-width: 400px;
  margin-inline: auto;
  margin-bottom: var(--seiryu-space-8);
}

/* --------------------------------------------------------------------------
   13. Search
   -------------------------------------------------------------------------- */
.seiryu-search-wrap {
  padding-block: var(--seiryu-space-16);
}

.seiryu-search-form-wrap {
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--seiryu-space-12);
}

.search-count {
  color: var(--seiryu-color-text-muted);
  margin-bottom: var(--seiryu-space-8);
}

.no-results {
  text-align: center;
  padding: var(--seiryu-space-16);
  color: var(--seiryu-color-text-muted);
}

/* --------------------------------------------------------------------------
   14. Block Styles
   -------------------------------------------------------------------------- */
/* Group: card */
.wp-block-group.is-style-card {
  background: var(--seiryu-color-bg);
  box-shadow: var(--seiryu-shadow-md);
  border-radius: var(--seiryu-radius-md);
  padding: var(--seiryu-space-8);
}

/* Group: bordered */
.wp-block-group.is-style-bordered {
  border: 1px solid var(--seiryu-color-border);
  border-radius: var(--seiryu-radius-md);
  padding: var(--seiryu-space-8);
}

/* Group: dark */
.wp-block-group.is-style-dark {
  background: var(--seiryu-color-bg-dark);
  color: var(--seiryu-color-text-inverse);
  padding: var(--seiryu-space-8);
}

/* Image: rounded */
.wp-block-image.is-style-rounded img { border-radius: var(--seiryu-radius-lg); }

/* Image: circle */
.wp-block-image.is-style-circle img {
  border-radius: 50%;
  aspect-ratio: 1;
  object-fit: cover;
}

/* Image: shadow */
.wp-block-image.is-style-shadow img { box-shadow: var(--seiryu-shadow-lg); }

/* Image: frame */
.wp-block-image.is-style-frame img {
  border: 8px solid #fff;
  box-shadow: var(--seiryu-shadow-lg);
}

/* Separator: thick */
.wp-block-separator.is-style-thick { border-width: 4px; }

/* Separator: gradient */
.wp-block-separator.is-style-gradient {
  border: none;
  height: 3px;
  background: linear-gradient(90deg, var(--seiryu-color-primary), var(--seiryu-color-secondary));
}

/* Separator: dotted */
.wp-block-separator.is-style-dotted { border-style: dotted; }

/* --------------------------------------------------------------------------
   15. Parallax Section Pattern
   -------------------------------------------------------------------------- */
.seiryu-section-parallax {
  position: relative;
  overflow: hidden;
}

.section-parallax-bg {
  position: absolute;
  inset: -20%;
  background-size: cover;
  background-position: center;
  will-change: transform;
}

.section-parallax-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
}

.seiryu-section-parallax .seiryu-two-col {
  position: relative;
  z-index: 1;
  color: var(--seiryu-color-text-inverse);
  padding-block: var(--seiryu-space-20);
}

/* --------------------------------------------------------------------------
   16. Widget Area
   -------------------------------------------------------------------------- */
.seiryu-sidebar {
  position: sticky;
  top: calc(var(--seiryu-space-16) + 80px);
}

.widget { margin-bottom: var(--seiryu-space-8); }

.widget-title {
  font-size: var(--seiryu-text-lg);
  font-weight: 700;
  margin-bottom: var(--seiryu-space-4);
  padding-bottom: var(--seiryu-space-2);
  border-bottom: 2px solid var(--seiryu-color-primary);
}

/* --------------------------------------------------------------------------
   17. Columns Block — Custom Styles
   -------------------------------------------------------------------------- */
.wp-block-columns.is-style-center  { justify-content: center; }
.wp-block-columns.is-style-justify { justify-content: space-between; }

/* --------------------------------------------------------------------------
   18. カスタム投稿タイプ（ニュース / 事例 / スタッフ）
   -------------------------------------------------------------------------- */

/* Badge */
.seiryu-badge {
  display: inline-block;
  font-size: var(--seiryu-text-xs);
  font-weight: 600;
  padding: 0.2em 0.7em;
  border-radius: var(--seiryu-radius-full);
  background: var(--seiryu-color-primary);
  color: var(--seiryu-color-text-inverse);
  text-decoration: none;
  transition: background 0.2s;
}
.seiryu-badge:hover { background: var(--seiryu-color-primary-light); }

/* ニュース一覧 */
.seiryu-news-list { display: flex; flex-direction: column; gap: 0; }

.seiryu-news-item {
  display: flex;
  gap: var(--seiryu-space-6);
  align-items: baseline;
  padding: var(--seiryu-space-4) 0;
  border-bottom: 1px solid var(--seiryu-color-border);
  flex-wrap: wrap;
}

.seiryu-news-item__meta {
  display: flex;
  align-items: center;
  gap: var(--seiryu-space-3);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.seiryu-news-item__meta time {
  font-size: var(--seiryu-text-sm);
  color: var(--seiryu-color-text-muted);
  white-space: nowrap;
}

.seiryu-news-item__title {
  font-size: var(--seiryu-text-base);
  font-weight: 500;
  margin: 0;
}

.seiryu-news-item__title a {
  color: var(--seiryu-color-text);
  text-decoration: none;
  transition: color 0.2s;
}
.seiryu-news-item__title a:hover { color: var(--seiryu-color-primary); }

/* 事例 クライアント名 */
.case-client {
  font-size: var(--seiryu-text-xs);
  color: var(--seiryu-color-text-muted);
}

/* 事例詳細 メタテーブル */
.case-meta-table {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--seiryu-color-border);
  border-radius: var(--seiryu-radius-md);
  overflow: hidden;
  margin: var(--seiryu-space-6) 0;
}

.case-meta-row {
  display: grid;
  grid-template-columns: 9rem 1fr;
  border-bottom: 1px solid var(--seiryu-color-border);
}
.case-meta-row:last-child { border-bottom: none; }

.case-meta-row dt {
  font-size: var(--seiryu-text-sm);
  font-weight: 600;
  background: var(--seiryu-color-bg-alt);
  padding: var(--seiryu-space-3) var(--seiryu-space-4);
  color: var(--seiryu-color-text-muted);
}

.case-meta-row dd {
  padding: var(--seiryu-space-3) var(--seiryu-space-4);
  font-size: var(--seiryu-text-sm);
}

/* スタッフグリッド */
.seiryu-staff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--seiryu-space-6);
}

.seiryu-staff-card__inner {
  display: block;
  text-decoration: none;
  color: var(--seiryu-color-text);
  border-radius: var(--seiryu-radius-md);
  overflow: hidden;
  box-shadow: var(--seiryu-shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}
.seiryu-staff-card__inner:hover {
  box-shadow: var(--seiryu-shadow-md);
  transform: translateY(-4px);
}

.seiryu-staff-card__photo img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.seiryu-staff-card__body {
  padding: var(--seiryu-space-4);
}

.seiryu-staff-card__dept,
.seiryu-staff-card__position {
  font-size: var(--seiryu-text-xs);
  color: var(--seiryu-color-text-muted);
  margin: 0 0 var(--seiryu-space-1);
}

.seiryu-staff-card__name {
  font-size: var(--seiryu-text-base);
  font-weight: 700;
  margin: 0 0 var(--seiryu-space-2);
}

.seiryu-staff-card__catch {
  font-size: var(--seiryu-text-xs);
  color: var(--seiryu-color-text-muted);
  margin: 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* スタッフ詳細 */
.seiryu-staff-detail__header {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--seiryu-space-8);
  align-items: start;
  margin-bottom: var(--seiryu-space-8);
}

.seiryu-staff-detail__photo img {
  width: 100%;
  border-radius: var(--seiryu-radius-md);
  object-fit: cover;
}

.seiryu-staff-detail__dept,
.seiryu-staff-detail__position {
  font-size: var(--seiryu-text-sm);
  color: var(--seiryu-color-text-muted);
  margin: 0;
}

.seiryu-staff-detail__name {
  font-size: clamp(var(--seiryu-text-2xl), 3vw, var(--seiryu-text-4xl));
  margin: var(--seiryu-space-2) 0 var(--seiryu-space-3);
}

.seiryu-staff-detail__catch {
  font-size: var(--seiryu-text-lg);
  color: var(--seiryu-color-primary);
  font-style: italic;
}

.seiryu-staff-back {
  margin-top: var(--seiryu-space-12);
}

@media (max-width: 768px) {
  .seiryu-news-item { flex-direction: column; gap: var(--seiryu-space-2); }
  .seiryu-staff-detail__header { grid-template-columns: 1fr; }
  .seiryu-staff-detail__photo { max-width: 200px; }
  .case-meta-row { grid-template-columns: 7rem 1fr; }
}

/* --------------------------------------------------------------------------
   19. 記事強化 — シェアボタン / 関連記事 / TOC
   -------------------------------------------------------------------------- */

/* --- SNS シェアボタン --- */
.seiryu-share {
  margin: var(--seiryu-space-12) 0 var(--seiryu-space-8);
  padding: var(--seiryu-space-6);
  background: var(--seiryu-color-bg-alt);
  border-radius: var(--seiryu-radius-md);
}

.seiryu-share__label {
  font-size: var(--seiryu-text-sm);
  font-weight: 600;
  color: var(--seiryu-color-text-muted);
  margin-bottom: var(--seiryu-space-3);
}

.seiryu-share__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--seiryu-space-2);
}

.seiryu-share__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.45em 1em;
  border-radius: var(--seiryu-radius-full);
  font-size: var(--seiryu-text-sm);
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.15s;
  color: #fff;
}
.seiryu-share__btn:hover { opacity: 0.85; transform: translateY(-1px); }

.seiryu-share__btn--x        { background: #000; }
.seiryu-share__btn--facebook  { background: #1877f2; }
.seiryu-share__btn--line      { background: #06c755; }
.seiryu-share__btn--copy      { background: var(--seiryu-color-text-muted); }
.seiryu-share__btn--copy.is-copied { background: #16a34a; }

/* --- 関連記事 --- */
.seiryu-related {
  margin-top: var(--seiryu-space-12);
  padding-top: var(--seiryu-space-8);
  border-top: 1px solid var(--seiryu-color-border);
}

.seiryu-related__title {
  font-size: var(--seiryu-text-xl);
  margin-bottom: var(--seiryu-space-6);
}

.seiryu-related__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--seiryu-space-4);
}

.seiryu-related__link {
  display: block;
  text-decoration: none;
  color: var(--seiryu-color-text);
  border-radius: var(--seiryu-radius-md);
  overflow: hidden;
  border: 1px solid var(--seiryu-color-border);
  transition: box-shadow 0.2s, transform 0.2s;
}
.seiryu-related__link:hover {
  box-shadow: var(--seiryu-shadow-md);
  transform: translateY(-3px);
}

.seiryu-related__thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--seiryu-color-bg-alt);
}
.seiryu-related__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s;
}
.seiryu-related__link:hover .seiryu-related__thumb img { transform: scale(1.03); }
.seiryu-related__thumb--no-image { background: var(--seiryu-color-border); }

.seiryu-related__body { padding: var(--seiryu-space-3) var(--seiryu-space-4); }

.seiryu-related__date time {
  font-size: var(--seiryu-text-xs);
  color: var(--seiryu-color-text-muted);
}

.seiryu-related__post-title {
  font-size: var(--seiryu-text-sm);
  font-weight: 600;
  line-height: 1.5;
  margin: var(--seiryu-space-1) 0 0;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

/* --- TOC（目次） --- */
.seiryu-toc {
  background: var(--seiryu-color-bg-alt);
  border-left: 4px solid var(--seiryu-color-primary);
  border-radius: 0 var(--seiryu-radius-md) var(--seiryu-radius-md) 0;
  padding: var(--seiryu-space-6);
  margin: var(--seiryu-space-8) 0;
}

.seiryu-toc__title {
  font-size: var(--seiryu-text-base);
  font-weight: 700;
  margin-bottom: var(--seiryu-space-4);
  color: var(--seiryu-color-primary);
}

.seiryu-toc__list {
  margin: 0;
  padding-left: var(--seiryu-space-6);
  list-style: decimal;
  display: flex;
  flex-direction: column;
  gap: var(--seiryu-space-2);
}

.seiryu-toc__sub {
  margin-top: var(--seiryu-space-2);
  padding-left: var(--seiryu-space-6);
  list-style: disc;
  display: flex;
  flex-direction: column;
  gap: var(--seiryu-space-1);
}

.seiryu-toc a {
  font-size: var(--seiryu-text-sm);
  color: var(--seiryu-color-text);
  text-decoration: none;
  transition: color 0.2s;
}
.seiryu-toc a:hover { color: var(--seiryu-color-primary); text-decoration: underline; }

/* --------------------------------------------------------------------------
   20. ウィジェットエリア
   -------------------------------------------------------------------------- */

/* 共通 */
.seiryu-widget-area {
  padding-block: var(--seiryu-space-8);
}

/* フッター前（全幅） */
.seiryu-widget-area--before-footer {
  padding-block: var(--seiryu-space-12);
  background: var(--seiryu-color-bg-alt);
  border-top: 1px solid var(--seiryu-color-border);
}
.seiryu-widget-area--fullwidth {
  width: 100%;
}

/* コンテンツ前後 */
.seiryu-widget-area--before-content {
  padding-bottom: 0;
}
.seiryu-widget-area--after-content {
  padding-top: var(--seiryu-space-8);
  border-top: 1px solid var(--seiryu-color-border);
  margin-top: var(--seiryu-space-8);
}

/* 記事下 */
.seiryu-widget-area--after-post {
  margin: var(--seiryu-space-8) 0;
  padding: var(--seiryu-space-8);
  background: var(--seiryu-color-bg-alt);
  border-radius: var(--seiryu-radius-md);
}

/* サイドバー2（ショートコード埋め込み時） */
.seiryu-widget-area--sidebar-2 {
  padding: var(--seiryu-space-6);
  border: 1px solid var(--seiryu-color-border);
  border-radius: var(--seiryu-radius-md);
}