/*
Theme Name: With Platinum
Theme URI: https://with-platinum.com/
Author: 岸田慎平
Description: プラチナカードのある暮らし — 静かで落ち着きのある高級感のオリジナルテーマ
Version: 1.0.0
Text Domain: with-platinum
*/

/* ============================================
   Design System
   - Primary: #1A1A2E (Dark Navy)
   - Accent: #C9B037 (Platinum Gold)
   - Accent Light: #E8D98E
   - Background: #FAFAFA
   - Background Alt: #F5F5F0
   - Text: #333333
   - Text Light: #666666
   - Border: #E0E0E0
   - Font Heading: 'Noto Serif JP'
   - Font Body: 'Noto Sans JP'
   ============================================ */

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

:root {
  --color-primary: #1A1A2E;
  --color-accent: #C9B037;
  --color-accent-light: #E8D98E;
  --color-bg: #FAFAFA;
  --color-bg-alt: #F5F5F0;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-border: #E0E0E0;
  --color-white: #FFFFFF;
  --font-body: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', sans-serif;
  --font-heading: 'Noto Serif JP', 'Hiragino Mincho ProN', serif;
  --max-width: 1180px;
  --main-width: 780px;
  --sidebar-width: 340px;
  --gap: 40px;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--color-primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--color-accent); }

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

/* === Layout === */
.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.content-wrap {
  display: flex;
  gap: var(--gap);
  align-items: flex-start;
}

.main-content {
  flex: 1;
  min-width: 0;
  max-width: var(--main-width);
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: 80px;
}

@media (max-width: 960px) {
  .content-wrap { flex-direction: column; }
  .sidebar { width: 100%; position: static; }
}

/* === Header === */
.site-header {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 6px rgba(0,0,0,0.1);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-header__logo {
  width: 34px;
  height: 34px;
  background: var(--color-accent);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary);
}

.site-header__title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.site-header__title a { color: var(--color-white); }
.site-header__title a:hover { color: var(--color-accent-light); }

/* Navigation */
.site-nav ul {
  list-style: none;
  display: flex;
  gap: 2px;
}

.site-nav a {
  color: rgba(255,255,255,0.8);
  font-size: 0.82rem;
  padding: 6px 14px;
  border-radius: 3px;
  transition: all 0.2s;
}

.site-nav a:hover,
.site-nav .current-menu-item a {
  color: var(--color-white);
  background: rgba(255,255,255,0.08);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-primary);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    padding: 10px 20px 16px;
  }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; }
  .site-nav a { display: block; padding: 10px 0; }
}

/* === Breadcrumb === */
.breadcrumb {
  font-size: 0.78rem;
  color: var(--color-text-light);
  padding: 14px 0;
  line-height: 1.5;
}

.breadcrumb a { color: var(--color-text-light); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { margin: 0 6px; }

/* === Article Card (Top / Archive) === */
.article-list { margin: 30px 0; }

.article-card {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.article-card:first-child { padding-top: 0; }

.article-card__thumb {
  width: 240px;
  flex-shrink: 0;
  border-radius: 4px;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.article-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.article-card:hover .article-card__thumb img {
  transform: scale(1.03);
}

.article-card__body { flex: 1; min-width: 0; }

.article-card__title {
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 8px;
}

.article-card__title a { color: var(--color-accent); }
.article-card__title a:hover { color: var(--color-accent-light); }

.article-card__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.article-card__category {
  display: inline-block;
  font-size: 0.68rem;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 2px 10px;
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.article-card__date {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

.article-card__excerpt {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}

.article-card__readmore {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-accent);
  transition: color 0.2s;
}

.article-card__readmore:hover {
  color: var(--color-accent-light);
}

@media (max-width: 600px) {
  .article-card { flex-direction: column; gap: 12px; }
  .article-card__thumb { width: 100%; }
}

/* === Single Article === */
.article-header { margin-bottom: 28px; }

.article-header__category {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-white);
  background: var(--color-accent);
  padding: 2px 12px;
  border-radius: 2px;
  font-weight: 600;
  margin-bottom: 10px;
}

.article-header__title {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.45;
  margin-bottom: 10px;
}

.article-header__meta {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

.article-header__meta time { margin-right: 12px; }

/* Eye catch */
.article-eyecatch {
  margin-bottom: 28px;
  border-radius: 6px;
  overflow: hidden;
}

.article-eyecatch img { width: 100%; }

/* Article body */
.article-body {
  font-size: 16px;
  line-height: 1.9;
}

.article-body h2 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 44px 0 18px;
  padding: 10px 0 10px 18px;
  border-left: 4px solid var(--color-accent);
  line-height: 1.4;
}

.article-body h3 {
  font-family: var(--font-heading);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 32px 0 14px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.4;
}

.article-body h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 24px 0 10px;
}

.article-body p { margin-bottom: 1.6em; }

.article-body ul, .article-body ol {
  margin: 0 0 1.6em 1.5em;
}

.article-body li { margin-bottom: 0.4em; }

.article-body blockquote {
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-alt);
  padding: 16px 20px;
  margin: 1.6em 0;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.9rem;
}

.article-body th {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 10px 14px;
  text-align: left;
  font-weight: 500;
  font-size: 0.85rem;
}

.article-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}

.article-body tr:nth-child(even) td {
  background: var(--color-bg-alt);
}

.article-body strong { color: var(--color-primary); }

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-accent-light);
}

.article-body a:hover {
  color: var(--color-accent);
}

/* === TOC (Table of Contents) === */
.toc-wrap {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 20px 24px;
  margin: 24px 0 32px;
}

.toc-title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  cursor: pointer;
}

.toc-title::after {
  content: ' [閉じる]';
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-weight: 400;
}

.toc-title.closed::after { content: ' [開く]'; }

.toc-content {
  display: block;
}

.toc-content.closed { display: none; }

.toc-content ol {
  list-style: none;
  counter-reset: toc;
  padding-left: 0;
  margin: 0;
}

.toc-content > ol > li {
  counter-increment: toc;
  margin-bottom: 6px;
}

.toc-content > ol > li::before {
  content: counter(toc) '.';
  color: var(--color-accent);
  font-weight: 700;
  margin-right: 6px;
}

.toc-content a {
  color: var(--color-text);
  font-size: 0.88rem;
  text-decoration: none;
}

.toc-content a:hover { color: var(--color-accent); }

.toc-content ol ol {
  padding-left: 1.2em;
  margin-top: 4px;
}

.toc-content ol ol li {
  font-size: 0.83rem;
  margin-bottom: 3px;
}

.toc-content ol ol li::before { content: none; }

/* === AdSense Slots === */
.ad-slot {
  margin: 28px 0;
  text-align: center;
}

.ad-slot--label::before {
  content: 'スポンサーリンク';
  display: block;
  font-size: 0.68rem;
  color: var(--color-text-light);
  text-align: center;
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}

.ad-slot--sidebar {
  margin: 0 0 24px;
}

/* === Affiliate CTA Box === */
.cta-box {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 20px 24px;
  margin: 28px 0;
}

.cta-box__title {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.cta-box__text {
  font-size: 0.88rem;
  color: var(--color-text-light);
  margin-bottom: 14px;
  line-height: 1.7;
}

.cta-box__btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.88rem;
  padding: 10px 24px;
  border-radius: 4px;
  transition: background 0.2s;
}

.cta-box__btn:hover {
  background: var(--color-accent-light);
  color: var(--color-primary);
}

.cta-box__pr {
  font-size: 0.65rem;
  color: var(--color-text-light);
  margin-top: 8px;
}

/* === Amazon Book Card === */
.amazon-card {
  display: flex;
  gap: 16px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 16px;
  margin: 16px 0;
  transition: box-shadow 0.2s;
}

.amazon-card:hover {
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.amazon-card__img {
  width: 100px;
  flex-shrink: 0;
}

.amazon-card__img img {
  border-radius: 3px;
}

.amazon-card__body { flex: 1; min-width: 0; }

.amazon-card__title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
  line-height: 1.4;
}

.amazon-card__desc {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 8px;
  line-height: 1.5;
}

.amazon-card__price {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.amazon-card__btn {
  display: inline-block;
  background: #FF9900;
  color: #FFFFFF;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 3px;
  transition: background 0.2s;
}

.amazon-card__btn:hover {
  background: #E88B00;
  color: #FFFFFF;
}

/* === A8 / VC Affiliate Banner === */
.af-banner {
  margin: 24px 0;
  text-align: center;
}

.af-banner img {
  margin: 0 auto;
  max-width: 100%;
}

.af-banner--sidebar {
  margin: 0 0 20px;
}

/* === Related Posts === */
.related-posts {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
}

.related-posts__title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.related-posts__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-post-card {
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow 0.2s;
}

.related-post-card:hover {
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.related-post-card__thumb {
  aspect-ratio: 16/10;
  overflow: hidden;
}

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

.related-post-card__title {
  font-size: 0.82rem;
  font-weight: 600;
  padding: 10px 12px;
  color: var(--color-primary);
  line-height: 1.4;
}

.related-post-card__title a { color: inherit; }

@media (max-width: 600px) {
  .related-posts__grid { grid-template-columns: 1fr; }
}

/* === Sidebar === */
.sidebar-widget {
  margin-bottom: 28px;
}

.sidebar-widget__title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 8px 14px;
  border-radius: 3px;
  margin-bottom: 14px;
}

/* Sidebar: Search */
.sidebar-widget .search-form {
  display: flex;
  gap: 0;
}

.sidebar-widget .search-form input[type="search"] {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: 3px 0 0 3px;
  font-size: 0.85rem;
  font-family: var(--font-body);
}

.sidebar-widget .search-form button {
  padding: 8px 14px;
  background: var(--color-accent);
  color: var(--color-primary);
  border: 1px solid var(--color-accent);
  border-radius: 0 3px 3px 0;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
}

.sidebar-widget .search-form button:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
  color: var(--color-primary);
}

/* Sidebar: Categories */
.sidebar-category-list {
  list-style: none;
  padding: 0;
}

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

.sidebar-category-item a {
  display: flex;
  justify-content: space-between;
  padding: 8px 4px;
  font-size: 0.85rem;
  color: var(--color-text);
}

.sidebar-category-item a:hover { color: var(--color-accent); }

.sidebar-category-count {
  color: var(--color-text-light);
  font-size: 0.78rem;
}

.sidebar-popular-list { list-style: none; padding: 0; }

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

.sidebar-popular-item__thumb {
  width: 70px;
  flex-shrink: 0;
  border-radius: 3px;
  overflow: hidden;
  aspect-ratio: 16/10;
}

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

.sidebar-popular-item__title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
}

.sidebar-popular-item__title a { color: inherit; }
.sidebar-popular-item__title a:hover { color: var(--color-accent); }

/* Sidebar: Amazon Books */
.sidebar-books {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-book-item {
  display: flex;
  gap: 10px;
  padding: 10px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: box-shadow 0.2s;
}

.sidebar-book-item:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.sidebar-book-item__img {
  width: 60px;
  flex-shrink: 0;
}

.sidebar-book-item__img img {
  border-radius: 2px;
  width: 100%;
}

.sidebar-book-item__body {
  flex: 1;
  min-width: 0;
}

.sidebar-book-item__title {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 4px;
}

.sidebar-book-item__title a { color: inherit; }
.sidebar-book-item__title a:hover { color: var(--color-accent); }

.sidebar-book-item__price {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

/* === Pagination === */
.navigation.pagination {
  margin: 40px 0;
}

.navigation.pagination .nav-links {
  display: flex;
  justify-content: center;
  gap: 6px;
}

.navigation.pagination .page-numbers {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 8px;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  font-size: 0.85rem;
  color: var(--color-text);
}

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

.navigation.pagination a.page-numbers:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* === Same Category Posts === */
.same-category-posts {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.same-category-posts__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  background: var(--color-primary);
  padding: 8px 16px;
  border-radius: 3px;
  margin-bottom: 16px;
}

.same-category-posts__list {
  list-style: none;
  padding: 0;
}

.same-category-posts__item {
  border-bottom: 1px solid var(--color-border);
}

.same-category-posts__item a {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  color: var(--color-text);
}

.same-category-posts__item a:hover {
  color: var(--color-accent);
}

.same-category-posts__thumb {
  width: 100px;
  flex-shrink: 0;
  border-radius: 3px;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.same-category-posts__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.same-category-posts__info {
  flex: 1;
  min-width: 0;
}

.same-category-posts__item-title {
  font-size: 0.88rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 4px;
}

.same-category-posts__date {
  font-size: 0.72rem;
  color: var(--color-text-light);
}

/* === Amex Referral Section === */
.amex-referral {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2A2A4A 100%);
  padding: 40px 20px;
  text-align: center;
  margin-top: 60px;
}

.amex-referral__title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.amex-referral__text {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  max-width: 680px;
  margin: 0 auto 20px;
}

.amex-referral__btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.92rem;
  padding: 12px 32px;
  border-radius: 4px;
  transition: background 0.2s;
}

.amex-referral__btn:hover {
  background: var(--color-accent-light);
  color: var(--color-primary);
}

/* === Footer === */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.5);
  padding: 16px 20px;
  font-size: 0.7rem;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.site-footer__nav {
  margin-bottom: 8px;
}

.site-footer__nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__nav li {
  display: inline;
}

.site-footer__nav li + li::before {
  content: '|';
  margin: 0 8px;
  color: rgba(255,255,255,0.3);
}

.site-footer a { color: rgba(255,255,255,0.7); }
.site-footer a:hover { color: var(--color-accent-light); }

.site-footer__copy {
  margin-top: 4px;
  font-size: 0.65rem;
  color: rgba(255,255,255,0.4);
}

/* === 404 === */
.page-404 {
  text-align: center;
  padding: 80px 20px;
}

.page-404__title {
  font-family: var(--font-heading);
  font-size: 3rem;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.page-404__text {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

/* === Utility === */
.text-center { text-align: center; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  border: 0;
}

/* === Print === */
@media print {
  .site-header, .site-footer, .sidebar, .sns-share, .ad-slot, .af-banner, .nav-toggle { display: none; }
  .content-wrap { display: block; }
  body { font-size: 12pt; color: #000; }
}