/*
Theme Name: 50start Blog
Description: 50start.club 向けのブログトップページテーマ。最新記事・カテゴリー別セクション・スマホ用アコーディオンメニューに対応したシンプルなクラシックテーマです。
Version: 1.2.0
Author: 50start.club
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: fiftystart
*/

:root {
  --teal: #006C84;
  --teal-dark: #00505f;
  --teal-light: #6EB5C0;
  --bg: #eceae6;
  --ink: #25303a;
  --text: #5a6670;
  --text-muted: #8b979e;
  --line: #eef2f3;
  --sage-bg: #E2E8E4;
  --sage-text: #2f5560;
  --card-bg: #F5F8F7;
  --card-bg2: #F1F5F4;
  --border: #cfdcdf;
  --font-serif: "Zen Old Mincho", serif;
  --font-sans: "Noto Sans JP", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  font-family: var(--font-sans);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

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

.eyebrow {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--text-muted);
  font-family: ui-monospace, monospace;
}

.hidden-mobile { display: block; }
.hidden-desktop { display: none; }

/* ---------- Header ---------- */
.site-header {
  background: var(--teal);
  color: #fff;
  padding: 0 24px;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-header__brand { display: flex; flex-direction: column; gap: 3px; padding: 12px 0; }
.site-header__title { font-family: var(--font-serif); font-size: 18px; font-weight: 700; color: #fff; letter-spacing: .02em; }
.site-header__tagline { font-size: 11px; color: rgba(255,255,255,.72); letter-spacing: .06em; }
.site-header__right { display: flex; align-items: center; gap: 24px; }
.site-nav { display: flex; gap: 22px; font-size: 13px; font-weight: 500; }
.site-nav a { color: rgba(255,255,255,.92); }
.site-nav a:hover { color: #fff; }

.hamburger-btn {
  width: 40px; height: 40px;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 5px;
  background: transparent;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
  cursor: pointer;
  flex: none;
}
.hamburger-btn:hover { background: rgba(255,255,255,.12); }
.hamburger-btn span { width: 18px; height: 1.5px; background: #fff; display: block; }

/* ---------- アフィリエイト表記(全ページ共通) ---------- */
.affiliate-notice {
  background: #F1F5F4;
  color: var(--text-muted);
  font-size: 11.5px;
  text-align: center;
  padding: 7px 16px;
}

/* ---------- Off-canvas menu ---------- */
.offcanvas { position: fixed; inset: 0; display: none; z-index: 100; }
.offcanvas.is-open { display: flex; justify-content: flex-end; }
.offcanvas__scrim { position: absolute; inset: 0; background: rgba(20,32,38,.45); }
.offcanvas__panel {
  position: relative;
  width: min(340px, 88vw);
  height: 100%;
  background: #fff;
  padding: 24px 26px;
  display: flex; flex-direction: column; gap: 22px;
  box-shadow: -12px 0 40px rgba(0,0,0,.18);
  overflow-y: auto;
}
.offcanvas__top { display: flex; align-items: center; justify-content: space-between; }
.offcanvas__close { background: none; border: none; font-size: 24px; line-height: 1; color: var(--text); cursor: pointer; }
.offcanvas__search input {
  width: 100%; border: none; background: var(--card-bg2); border-radius: 5px;
  padding: 11px 14px; font-size: 13px; color: var(--ink);
}
.offcanvas__search input::placeholder { color: var(--text-muted); }
.offcanvas__cats { list-style: none; margin: 0; padding: 0; }
.offcanvas__cats li { border-bottom: 1px solid var(--line); }
.offcanvas__cats a { display: block; padding: 13px 0; font-size: 15px; color: var(--ink); }
.offcanvas__footer-links { font-size: 13px; color: var(--text); }
.offcanvas__footer-links-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.offcanvas__footer-links-list a { color: var(--text); }

/* ---------- Layout ---------- */
.page-wrap { max-width: 1280px; margin: 0 auto; background: #fff; }
.content-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 44px;
  padding: 40px 40px 48px;
}
.main-col { display: flex; flex-direction: column; gap: 44px; min-width: 0; }
.block { display: flex; flex-direction: column; gap: 22px; }
.sidebar-col { display: flex; flex-direction: column; gap: 32px; }

.section-head {
  display: flex; align-items: baseline; gap: 12px;
  border-bottom: 1px solid #dde5e8;
  padding-bottom: 10px;
}
.section-head h2 { margin: 0; font-family: var(--font-serif); font-size: 19px; color: var(--ink); }
.section-head--accent { border-bottom: 2px solid var(--teal); }
.section-head--accent h2 { font-size: 20px; }
.section-head__more { margin-left: auto; font-size: 12px; color: var(--teal); font-weight: 500; }

.thumb-placeholder {
  background: repeating-linear-gradient(135deg,#e4ebe8,#e4ebe8 8px,#f2f6f4 8px,#f2f6f4 16px);
  display: flex; align-items: center; justify-content: center;
  font-family: ui-monospace, monospace; font-size: 11px; color: #7d8f95;
}
.thumb-placeholder--hero { background: repeating-linear-gradient(135deg,#dfe9eb,#dfe9eb 8px,#eff4f5 8px,#eff4f5 16px); }
img.post-thumb { display: block; width: 100%; height: 100%; object-fit: cover; }

/* Latest: hero */
.latest-hero { display: flex; gap: 24px; }
.latest-hero__thumb { width: 360px; height: 214px; border-radius: 6px; flex: none; overflow: hidden; }
.latest-hero__body { display: flex; flex-direction: column; gap: 12px; padding-top: 4px; min-width: 0; }
.latest-hero__meta { display: flex; align-items: center; gap: 12px; }
.cat-badge { font-size: 11px; padding: 4px 10px; border-radius: 3px; background: var(--teal); color: #fff; letter-spacing: .04em; }
.cat-badge--soft { background: var(--sage-bg); color: var(--sage-text); }
.post-date { font-size: 11px; color: var(--text-muted); font-family: ui-monospace, monospace; }
.latest-hero__title { font-family: var(--font-serif); font-size: 24px; line-height: 1.5; font-weight: 700; color: var(--ink); }
.latest-hero__excerpt { font-size: 13.5px; line-height: 1.9; color: var(--text); }
.latest-hero__more { font-size: 13px; color: var(--teal); font-weight: 500; margin-top: 2px; }

/* Latest: desktop grid of 3 */
.latest-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.latest-card { display: flex; flex-direction: column; gap: 10px; }
.latest-card__thumb { height: 126px; border-radius: 5px; overflow: hidden; }
.latest-card__meta { display: flex; align-items: center; gap: 10px; }
.latest-card__meta .cat-badge { font-size: 10.5px; padding: 3px 8px; }
.latest-card__meta .post-date { font-size: 10.5px; }
.latest-card__title { font-size: 14.5px; font-weight: 700; line-height: 1.6; color: var(--ink); }
.latest-card__excerpt { font-size: 12.5px; line-height: 1.8; color: var(--text); }

/* Latest: mobile list */
.latest-list { display: none; flex-direction: column; }
.latest-list__row { display: flex; gap: 12px; padding-top: 16px; border-top: 1px solid var(--line); }
.latest-list__thumb { width: 104px; height: 78px; border-radius: 5px; flex: none; overflow: hidden; }
.latest-list__body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.latest-list__meta { display: flex; align-items: center; gap: 8px; }
.latest-list__meta .cat-badge { font-size: 10px; padding: 2px 7px; }
.latest-list__meta .post-date { font-size: 10px; }
.latest-list__title { font-size: 14px; font-weight: 700; line-height: 1.6; color: var(--ink); }
.latest-more-link {
  border: 1px solid var(--border); border-radius: 5px; padding: 13px; text-align: center;
  font-size: 13px; font-weight: 500; color: var(--teal); margin-top: 6px; display: none;
}

/* Category sections (desktop) */
.category-section .latest-card__thumb { height: 118px; }
.category-section .latest-card__title { font-size: 14px; }

/* Sidebar widgets */
.profile-box {
  background: var(--card-bg); border-radius: 6px; padding: 24px;
  display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center;
}
.profile-box__avatar { width: 76px; height: 76px; border-radius: 50%; overflow: hidden; }
.profile-box__avatar img { width: 100%; height: 100%; object-fit: cover; }
.profile-box__name { font-size: 15px; font-weight: 700; color: var(--ink); }
.profile-box__bio { font-size: 12px; line-height: 1.85; color: var(--text); }
.profile-box__links { display: flex; gap: 10px; padding-top: 4px; }
.profile-box__links a {
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 4px;
  font-size: 11.5px; color: var(--sage-text);
}

.widget-block { display: flex; flex-direction: column; gap: 12px; }
.widget-block__title { font-size: 13px; font-weight: 700; color: var(--ink); border-left: 3px solid var(--teal-light); padding-left: 10px; }
.cat-list { list-style: none; margin: 0; padding: 0; }
.cat-list li { display: flex; justify-content: space-between; font-size: 13px; color: #3d4a52; padding: 7px 0; border-bottom: 1px solid var(--line); }
.cat-list a { color: #3d4a52; }
.cat-list .count { color: #9aa5ab; font-family: ui-monospace, monospace; font-size: 11px; }

.popular-list { display: flex; flex-direction: column; gap: 12px; }
.popular-list__row { display: flex; gap: 10px; align-items: flex-start; }
.popular-list__thumb { width: 56px; height: 42px; border-radius: 4px; flex: none; overflow: hidden; }
.popular-list__title { font-size: 12px; line-height: 1.65; color: #3d4a52; }

.ad-slot { border: 1px dashed var(--border); border-radius: 6px; display: flex; align-items: center; justify-content: center; font-family: ui-monospace, monospace; font-size: 11px; color: #9aa5ab; overflow: hidden; }
.ad-slot--rect { height: 250px; }
.ad-slot--leaderboard { height: 100px; background: rgba(255,255,255,.4); }

/* 広告ウィジェットの実体を包む枠。AdSenseの自動サイズ計算を邪魔しないよう、
   flexでの中央寄せやoverflow:hiddenは使わず、幅100%のシンプルなブロックにする。 */
.ad-widget-box { width: 100%; text-align: center; }
.ad-widget-box--rect { min-height: 250px; }
.ad-widget-box--leaderboard { min-height: 100px; }
.ad-widget-box--infeed { min-height: 110px; }

/* ---------- Accordion (mobile) ---------- */
.accordion-block { display: none; }
.accordion { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-item__head {
  width: 100%; background: #fff; border: none; padding: 0 14px; min-height: 56px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; cursor: pointer; text-align: left;
}
.accordion-item.is-open > .accordion-item__head { background: #F7FAF9; }
.accordion-item__label { display: flex; align-items: center; gap: 11px; }
.accordion-item__bar { width: 4px; height: 18px; border-radius: 2px; background: var(--teal-light); }
.accordion-item.is-open .accordion-item__bar { background: var(--teal); }
.accordion-item__name { font-size: 15px; font-weight: 500; color: var(--ink); }
.accordion-item__count { font-size: 11px; color: #9aa5ab; font-family: ui-monospace, monospace; }
.accordion-item__sign { font-size: 15px; color: var(--teal); width: 20px; text-align: center; }
.accordion-item__sign .sign-minus { display: none; }
.accordion-item.is-open .accordion-item__sign .sign-plus { display: none; }
.accordion-item.is-open .accordion-item__sign .sign-minus { display: inline; }
.accordion-item__panel { display: none; padding: 4px 14px 18px; flex-direction: column; gap: 14px; background: #F7FAF9; }
.accordion-item.is-open .accordion-item__panel { display: flex; }
.accordion-item__post { display: flex; gap: 12px; align-items: flex-start; }
.accordion-item__post-thumb { width: 84px; height: 64px; border-radius: 5px; flex: none; overflow: hidden; }
.accordion-item__post-title { font-size: 13.5px; font-weight: 500; line-height: 1.65; color: var(--ink); }
.accordion-item__more { align-self: flex-start; font-size: 12.5px; color: var(--teal); font-weight: 500; padding: 8px 0; }
.accordion-item__empty { margin: 0; font-size: 12.5px; color: var(--text-muted); }

/* ---------- パンくず ---------- */
.breadcrumb ol {
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}
.breadcrumb li { display: flex; align-items: center; gap: 6px; min-width: 0; }
.breadcrumb li + li::before { content: "›"; color: #b6c1c5; }
.breadcrumb a { color: var(--sage-text); }
.breadcrumb a:hover { color: var(--teal); text-decoration: underline; }
.breadcrumb li:last-child span {
  display: inline-block;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: bottom;
}
.page-content-wrap .breadcrumb ol { margin-bottom: 12px; }

@media (max-width: 900px) {
  .breadcrumb ol { font-size: 11.5px; flex-wrap: nowrap; }
  .breadcrumb li:not(:last-child) { flex: none; }
}

/* ---------- Single article ---------- */
.single-article { display: flex; flex-direction: column; gap: 20px; }
.single-article__meta { display: flex; align-items: center; gap: 12px; }
.single-article__title { margin: 0; font-family: var(--font-serif); font-size: 28px; line-height: 1.5; color: var(--ink); }
.single-article__thumb { border-radius: 6px; overflow: hidden; }
.single-article__thumb .thumb-placeholder,
.single-article__thumb img { width: 100%; height: auto; aspect-ratio: 16 / 9; }
.single-article__content { font-size: 15.5px; line-height: 2; color: #3d4a52; }
.single-article__content p { margin: 0 0 1.6em; }
.single-article__content h2,
.single-article__content h3 { font-family: var(--font-serif); color: var(--ink); }
.single-article__content img { max-width: 100%; height: auto; border-radius: 6px; }
.single-article__tags { display: flex; gap: 10px; flex-wrap: wrap; }

.ad-slot--infeed { height: 110px; width: 100%; }

@media (max-width: 900px) {
  .ad-slot--infeed { height: 100px; }
}

@media (max-width: 900px) {
  .single-article__title { font-size: 21px; }
}

/* ---------- 固定ページ ---------- */
.page-content-wrap { max-width: 760px; margin: 0 auto; padding: 48px 24px 64px; }
.page-article__title { margin: 0 0 24px; font-family: var(--font-serif); font-size: 26px; line-height: 1.5; color: var(--ink); }
.page-article__content { font-size: 15px; line-height: 2; color: #3d4a52; }
.page-article__content p { margin: 0 0 1.6em; }
.page-article__content h2,
.page-article__content h3 { font-family: var(--font-serif); color: var(--ink); margin-top: 1.6em; }
.page-article__content img { max-width: 100%; height: auto; border-radius: 6px; }
.page-article__content a { text-decoration: underline; }

.not-found { display: flex; flex-direction: column; gap: 20px; align-items: flex-start; }
.not-found__search { display: flex; gap: 8px; width: 100%; max-width: 380px; }
.not-found__search input {
  flex: 1; border: 1px solid var(--border); border-radius: 5px;
  padding: 10px 14px; font-size: 13px; color: var(--ink); background: var(--card-bg2);
}
.not-found__search button {
  border: none; border-radius: 5px; background: var(--teal); color: #fff;
  font-size: 13px; padding: 10px 18px; cursor: pointer;
}
.not-found__search button:hover { background: var(--teal-dark); }
.not-found .widget-block { width: 100%; max-width: 380px; }

@media (max-width: 900px) {
  .page-content-wrap { padding: 28px 16px 40px; }
  .page-article__title { font-size: 21px; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--sage-bg); padding: 36px 40px; display: flex; flex-direction: column; gap: 28px; }
.footer-info { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; flex-wrap: wrap; }
.footer-brand { display: flex; flex-direction: column; gap: 8px; }
.footer-brand__title { font-family: var(--font-serif); font-size: 16px; color: var(--ink); }
.footer-brand__copy { font-size: 11.5px; color: #6b7873; }
.footer-links { display: flex; gap: 22px; font-size: 12.5px; color: var(--sage-text); list-style: none; margin: 0; padding: 0; }
.footer-links a { color: var(--sage-text); }
.footer-info-mobile { display: none; }
.footer-links-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; font-size: 13px; color: var(--sage-text); list-style: none; margin: 0; padding: 0; }
.footer-links-grid a { color: var(--sage-text); }
.footer-copy-mobile { font-size: 11px; color: #6b7873; border-top: 1px solid #cbd6d2; padding-top: 16px; }

/* ---------- 上部に戻るボタン ---------- */
.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--teal);
  color: #fff;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0,0,0,.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  z-index: 90;
}
.back-to-top:hover { background: var(--teal-dark); }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }

@media (max-width: 900px) {
  .back-to-top { right: 14px; bottom: 14px; width: 40px; height: 40px; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hidden-mobile { display: none !important; }
  .hidden-desktop { display: block !important; }

  .site-header { padding: 12px 16px; min-height: 0; }
  .site-header__title { font-size: 16px; }

  .content-grid { grid-template-columns: 1fr; gap: 0; padding: 20px 16px 24px; }
  .main-col { gap: 4px; }
  .sidebar-col { display: none; }

  .latest-hero { flex-direction: column; gap: 10px; }
  .latest-hero__thumb { width: 100%; height: auto; aspect-ratio: 16 / 9; }
  .latest-hero__title { font-size: 19px; }

  .latest-grid { display: none; }
  .latest-list { display: flex; }
  .latest-more-link { display: block; }

  .category-section { display: none; }

  .accordion-block { display: flex; flex-direction: column; gap: 12px; padding: 20px 0 4px; }

  .site-footer { padding: 24px 16px 30px; gap: 22px; }
  .footer-info { display: none; }
  .footer-info-mobile { display: flex; flex-direction: column; gap: 22px; }
}