/*
Theme Name: サブスクHP Blog
Theme URI: https://sg-hp.com/blog/
Author: SG株式会社
Author URI: https://sg-hp.com/
Description: サブスクHP公式ブログ用WordPressテーマ。メインサイトと統一されたデザイン。
Version: 1.0.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: subschp-blog
Requires at least: 6.0
Requires PHP: 7.4

NOTE: screenshot.png should be added later (1200x900px recommended)
*/

/* ============================================
   リセット・ベース
   ============================================ */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #2563EB;
  --color-primary-dark: #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-accent: #06C755;
  --color-accent-dark: #05A847;
  --color-text: #1E293B;
  --color-text-sub: #64748B;
  --color-bg: #FFFFFF;
  --color-bg-sub: #F8FAFC;
  --color-border: #E2E8F0;
  --font-family: 'Noto Sans JP', sans-serif;
  --header-height: 70px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: 400;
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--color-primary-dark);
}

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

ul, ol {
  list-style: none;
}

/* ============================================
   共通ユーティリティ
   ============================================ */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

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

/* ============================================
   CTAボタン
   ============================================ */
.cta-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--color-accent);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  padding: 16px 40px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.2s;
  text-decoration: none;
}

.cta-line:hover {
  background-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-2px);
}

.cta-line--small {
  font-size: 14px;
  padding: 10px 24px;
}

.cta-line--large {
  font-size: 18px;
  padding: 20px 48px;
}

.cta-line svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* ============================================
   CTAセクション
   ============================================ */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #3B82F6 100%);
  color: #fff;
}

.cta-section__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.cta-section__heading {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-section__sub {
  font-size: 16px;
  margin-bottom: 32px;
  opacity: 0.9;
}

.cta-section .cta-line {
  background-color: var(--color-accent);
}

.cta-section .cta-line:hover {
  background-color: var(--color-accent-dark);
}

/* ============================================
   ヘッダー
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  transition: box-shadow 0.3s;
}

.header--scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.header__logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.header__logo:hover {
  color: var(--color-primary);
}

.header__logo-img {
  height: 36px;
  display: none;
}

.header__logo-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.header__nav-list a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.3s;
  position: relative;
}

.header__nav-list a:hover,
.header__nav-list a.active {
  color: var(--color-primary);
}

.header__nav-list a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
}

/* ハンバーガーメニュー */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 30px;
  height: 30px;
  cursor: pointer;
  z-index: 1100;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.3s, opacity 0.3s;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* オーバーレイ */
.nav-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
}

.nav-overlay.active {
  display: block;
}

/* ============================================
   フッター
   ============================================ */
.footer {
  background-color: var(--color-text);
  color: #CBD5E1;
  padding: 60px 0 0;
}

.footer__inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer__brand {
  margin-bottom: 16px;
}

.footer__logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.footer__company {
  font-size: 14px;
  color: #94A3B8;
  margin-bottom: 4px;
}

.footer__address {
  font-size: 14px;
  color: #94A3B8;
  font-style: normal;
  line-height: 1.8;
}

.footer__nav-list {
  list-style: none;
}

.footer__nav-list a {
  display: block;
  font-size: 14px;
  color: #94A3B8;
  padding: 4px 0;
  transition: color 0.3s;
}

.footer__nav-list a:hover {
  color: #fff;
}

.footer__copyright {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  border-top: 1px solid #334155;
  text-align: center;
  font-size: 13px;
  color: #64748B;
}

/* ============================================
   フローティングCTA（SPのみ）
   ============================================ */
.floating-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.1);
  z-index: 900;
  transform: translateY(100%);
  transition: transform 0.3s;
}

.floating-cta.visible {
  transform: translateY(0);
}

.floating-cta .cta-line {
  width: 100%;
  font-size: 15px;
  padding: 14px;
}

/* ============================================
   パンくずリスト
   ============================================ */
.breadcrumb {
  padding: 16px 0;
  font-size: 13px;
  color: var(--color-text-sub);
}

.breadcrumb a {
  color: var(--color-text-sub);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb span {
  margin: 0 8px;
  color: var(--color-border);
}

/* ============================================
   ページヘッダー
   ============================================ */
.page-header {
  background-color: var(--color-bg-sub);
  padding: 100px 0 40px;
  text-align: center;
}

.page-header__title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
}

.page-header__desc {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-top: 8px;
}

/* ============================================
   ブログレイアウト
   ============================================ */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 48px 20px;
}

.blog-main {
  min-width: 0;
}

/* ============================================
   記事カードグリッド
   ============================================ */
.post-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.post-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.post-card__thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  background-color: var(--color-bg-sub);
  overflow: hidden;
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.post-card__thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-sub);
  font-size: 14px;
  background-color: var(--color-bg-sub);
}

.post-card__body {
  padding: 20px;
}

.post-card__cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}

.post-card__cat a {
  color: var(--color-primary);
  text-decoration: none;
}

.post-card__title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
  color: var(--color-text);
}

.post-card__title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.3s;
}

.post-card__title a:hover {
  color: var(--color-primary);
}

.post-card__date {
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 8px;
}

.post-card__excerpt {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ============================================
   ページネーション
   ============================================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  padding: 20px 0;
}

.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.3s;
}

.pagination .page-numbers:hover {
  background-color: var(--color-bg-sub);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.pagination .page-numbers.dots {
  border: none;
  background: none;
}

.pagination .page-numbers.prev,
.pagination .page-numbers.next {
  font-weight: 700;
}

/* ============================================
   シングル記事
   ============================================ */
.single-article {
  background: var(--color-bg);
}

.single-article__cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-primary-light);
  padding: 2px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.single-article__cat a {
  color: var(--color-primary);
  text-decoration: none;
}

.single-article__title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 16px;
  color: var(--color-text);
}

.single-article__meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.single-article__date {
  display: flex;
  align-items: center;
  gap: 4px;
}

.single-article__author {
  display: flex;
  align-items: center;
  gap: 4px;
}

.single-article__thumb {
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 40px;
}

.single-article__thumb img {
  width: 100%;
  height: auto;
}

/* 記事本文 */
.single-article__content {
  line-height: 2;
  font-size: 16px;
  color: var(--color-text);
}

.single-article__content h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-text);
}

.single-article__content h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 36px 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--color-primary);
  color: var(--color-text);
}

.single-article__content h4 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--color-text);
}

.single-article__content p {
  margin-bottom: 20px;
}

.single-article__content ul,
.single-article__content ol {
  margin: 20px 0;
  padding-left: 24px;
}

.single-article__content ul {
  list-style: disc;
}

.single-article__content ol {
  list-style: decimal;
}

.single-article__content li {
  margin-bottom: 8px;
  line-height: 1.8;
}

.single-article__content blockquote {
  margin: 24px 0;
  padding: 20px 24px;
  background-color: var(--color-bg-sub);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 8px 8px 0;
  color: var(--color-text-sub);
  font-size: 15px;
}

.single-article__content blockquote p:last-child {
  margin-bottom: 0;
}

.single-article__content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 24px 0;
}

.single-article__content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
}

.single-article__content table th,
.single-article__content table td {
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  font-size: 14px;
}

.single-article__content table th {
  background-color: var(--color-bg-sub);
  font-weight: 700;
}

.single-article__content code {
  background-color: var(--color-bg-sub);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  color: #E11D48;
}

.single-article__content pre {
  background-color: #1E293B;
  color: #E2E8F0;
  padding: 20px 24px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.6;
}

.single-article__content pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: 14px;
}

.single-article__content a {
  color: var(--color-primary);
  text-decoration: underline;
}

.single-article__content a:hover {
  color: var(--color-primary-dark);
}

/* 投稿ナビゲーション */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.post-navigation__item {
  display: block;
  padding: 20px;
  background-color: var(--color-bg-sub);
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.3s;
}

.post-navigation__item:hover {
  background-color: var(--color-primary-light);
}

.post-navigation__item--prev {
  text-align: left;
}

.post-navigation__item--next {
  text-align: right;
}

.post-navigation__label {
  display: block;
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 4px;
}

.post-navigation__title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
}

/* ============================================
   サイドバー
   ============================================ */
.sidebar {
  min-width: 0;
}

.sidebar-widget {
  margin-bottom: 32px;
  padding: 24px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.sidebar-widget__title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-text);
}

/* サイドバー検索 */
.sidebar-search {
  display: flex;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

.sidebar-search__input {
  flex: 1;
  padding: 10px 14px;
  border: none;
  font-size: 14px;
  font-family: var(--font-family);
  outline: none;
  background: var(--color-bg);
  color: var(--color-text);
}

.sidebar-search__input::placeholder {
  color: var(--color-text-sub);
}

.sidebar-search__btn {
  padding: 10px 16px;
  background-color: var(--color-primary);
  color: #fff;
  border: none;
  font-size: 14px;
  cursor: pointer;
  transition: background-color 0.3s;
  font-family: var(--font-family);
}

.sidebar-search__btn:hover {
  background-color: var(--color-primary-dark);
}

/* サイドバーカテゴリー */
.sidebar-categories {
  list-style: none;
}

.sidebar-categories li {
  border-bottom: 1px solid var(--color-border);
}

.sidebar-categories li:last-child {
  border-bottom: none;
}

.sidebar-categories a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.3s;
}

.sidebar-categories a:hover {
  color: var(--color-primary);
}

.sidebar-categories__count {
  font-size: 12px;
  color: var(--color-text-sub);
  background-color: var(--color-bg-sub);
  padding: 2px 8px;
  border-radius: 10px;
}

/* サイドバー最新記事 */
.sidebar-recent {
  list-style: none;
}

.sidebar-recent__item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-recent__item:last-child {
  border-bottom: none;
}

.sidebar-recent__thumb {
  flex-shrink: 0;
  width: 72px;
  height: 48px;
  border-radius: 6px;
  overflow: hidden;
  background-color: var(--color-bg-sub);
}

.sidebar-recent__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-recent__info {
  min-width: 0;
}

.sidebar-recent__title {
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 2px;
}

.sidebar-recent__title a {
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.3s;
}

.sidebar-recent__title a:hover {
  color: var(--color-primary);
}

.sidebar-recent__date {
  font-size: 12px;
  color: var(--color-text-sub);
}

/* サイドバーCTAバナー */
.sidebar-cta {
  padding: 24px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #3B82F6 100%);
  border-radius: 12px;
  text-align: center;
  color: #fff;
  border: none;
}

.sidebar-cta__heading {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  border-bottom: none;
  color: #fff;
}

.sidebar-cta__text {
  font-size: 13px;
  opacity: 0.9;
  margin-bottom: 16px;
}

.sidebar-cta .cta-line {
  font-size: 14px;
  padding: 12px 24px;
  width: 100%;
}

/* ============================================
   固定ページ
   ============================================ */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 20px;
}

.page-content h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
}

.page-content p {
  margin-bottom: 20px;
  line-height: 1.8;
}

/* ============================================
   404ページ
   ============================================ */
.error404-content {
  text-align: center;
  padding: 80px 20px;
  max-width: 600px;
  margin: 0 auto;
}

.error404-content__title {
  font-size: 80px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.error404-content__message {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.error404-content__desc {
  font-size: 15px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  line-height: 1.8;
}

.error404-content__links {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.error404-content__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-primary);
  padding: 12px 24px;
  border: 1px solid var(--color-primary);
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.3s;
}

.error404-content__link:hover {
  background-color: var(--color-primary);
  color: #fff;
}

/* ============================================
   アーカイブ（空ステート）
   ============================================ */
.no-posts {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-sub);
  font-size: 16px;
}

.no-posts p {
  margin-bottom: 16px;
}

/* ============================================
   レスポンシブ（SP: ~768px）
   ============================================ */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .section {
    padding: 56px 0;
  }

  /* ヘッダー SP */
  .hamburger {
    display: flex;
  }

  .header__nav {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100%;
    background-color: #fff;
    flex-direction: column;
    padding: 80px 24px 24px;
    gap: 0;
    z-index: 1050;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  }

  .header__nav.active {
    display: flex;
  }

  .header__nav-list {
    flex-direction: column;
    gap: 0;
    width: 100%;
  }

  .header__nav-list a {
    font-size: 16px;
    padding: 14px 0;
    display: block;
    border-bottom: 1px solid var(--color-border);
  }

  .header__nav .cta-line--small {
    margin-top: 16px;
  }

  /* フローティングCTA */
  .floating-cta {
    display: block;
  }

  /* ブログレイアウト SP */
  .blog-layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 16px;
  }

  /* 記事カードグリッド SP */
  .post-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* ページヘッダー SP */
  .page-header {
    padding: 80px 0 32px;
  }

  .page-header__title {
    font-size: 24px;
  }

  /* シングル記事 SP */
  .single-article__title {
    font-size: 22px;
  }

  .single-article__content h2 {
    font-size: 20px;
  }

  .single-article__content h3 {
    font-size: 18px;
  }

  .single-article__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  /* 投稿ナビゲーション SP */
  .post-navigation {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .post-navigation__item--next {
    text-align: left;
  }

  /* CTA SP */
  .cta-line--large {
    font-size: 16px;
    padding: 16px 32px;
  }

  .cta-section__heading {
    font-size: 20px;
  }

  /* フッター SP */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* body padding for floating CTA */
  body {
    padding-bottom: 70px;
  }
}