/* ============================================================
   Business Journal — media stylesheet
   design.md (Clear SaaS) のトークンに厳密準拠。
   LPテンプレートのデザインシステムを継承し、メディア向けに拡張。

   命名規則: プレフィックス + BEM
     l-*  Layout     ページ骨格
     c-*  Component  再利用部品
     p-*  Project    テンプレ固有の塊
     u-*  Utility    補助クラス
     要素は __ 、修飾子は --
   ============================================================ */

/* ===== 1. Design Tokens ===== */
:root {
  /* --- Primary Navy --- */
  --color-primary: #18408a;
  --color-primary-hover: #102d63;
  --color-primary-deep: #0a2456;

  /* --- Brand Gradient --- */
  --color-brand-blue: #4578d8;
  --color-brand-aqua: #2aaadd;
  --gradient-brand: linear-gradient(90deg, #4578d8 0%, #2aaadd 100%);

  /* --- Text --- */
  --color-text: #0f1b3d;
  --color-text-mute: #5b6478;
  --color-text-on-brand: #ffffff;
  --color-text-on-brand-mute: rgba(255, 255, 255, 0.85);

  /* --- Neutrals --- */
  --color-bg: #ffffff;
  --color-bg-soft: #f5f8fc;
  --color-bg-cool: #eef3fa;
  --color-border: #e1e7f0;

  /* --- Functional --- */
  --color-success: #2d9d78;
  --color-warning: #d97706;
  --color-danger: #d94545;

  /* --- Fonts --- */
  --font-jp: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'ヒラギノ角ゴ ProN W3', sans-serif;
  --font-en: 'Inter', 'Helvetica Neue', Arial, sans-serif;

  /* --- Type Scale --- */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.5rem;
  --text-2xl: 2rem;
  --text-3xl: 2.75rem;
  --text-hero: 3.5rem;

  /* --- Spacing (8px base) --- */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* --- Layout --- */
  --container-max: 1120px;
  --container-narrow: 800px;
  --container-article: 720px;

  /* --- Radius --- */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* --- Shadows (二層影・ブランドカラー活用) --- */
  --shadow-card:
    0 3px 10px rgba(69, 120, 216, 0.14),
    0 20px 44px rgba(42, 170, 221, 0.10);
  --shadow-card-strong:
    0 6px 16px rgba(69, 120, 216, 0.22),
    0 32px 64px rgba(42, 170, 221, 0.16);
}

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

* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  font-family: var(--font-jp);
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol { list-style: none; }

:focus-visible {
  outline: 2px solid var(--color-brand-aqua);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ===== 3. Utilities (u-) ===== */
.u-sp-only { display: inline; }
@media (min-width: 768px) {
  .u-sp-only { display: none; }
}

/* ===== 4. Layout (l-) ===== */
.l-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}
@media (min-width: 768px) {
  .l-container { padding: 0 var(--space-4); }
}

.l-container--narrow {
  max-width: var(--container-narrow);
}
.l-container--article {
  max-width: var(--container-article);
}

.l-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.l-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: var(--space-3);
}
.l-header__cta { display: none; }
@media (min-width: 1024px) {
  .l-header__cta { display: inline-flex; }
}

.l-section {
  padding: var(--space-8) 0;
}
.l-section--soft { background: var(--color-bg-soft); }
.l-section--cool { background: var(--color-bg-cool); }
@media (min-width: 768px) {
  .l-section { padding: var(--space-12) 0; }
}
@media (min-width: 1024px) {
  .l-section { padding: var(--space-16) 0; }
}

/* ===== 5. Components (c-) ===== */

/* --- c-button --- */
.c-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-jp);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-sm);
  min-height: 52px;
  transition: background-color .2s ease,
              color .2s ease,
              box-shadow .2s ease,
              border-color .2s ease,
              transform .15s ease;
  white-space: nowrap;
}
.c-button--primary {
  background: var(--color-primary);
  color: #ffffff;
}
.c-button--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 8px 22px rgba(24, 64, 138, 0.32);
  transform: translateY(-1px);
}
.c-button--secondary {
  background: var(--color-bg-cool);
  color: var(--color-primary);
}
.c-button--secondary:hover {
  background: var(--color-border);
}
.c-button--ghost {
  background: transparent;
  color: #ffffff;
  border: 1.5px solid rgba(255, 255, 255, 0.7);
}
.c-button--ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #ffffff;
}
.c-button--sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  min-height: 40px;
}

/* --- c-brand --- */
.c-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}
.c-brand__mark {
  display: inline-block;
  width: 16px;
  height: 16px;
  background: var(--gradient-brand);
  border-radius: 4px;
}

/* --- c-nav (ホバーでグラデフェード) --- */
.c-nav {
  display: none;
  gap: var(--space-4);
}
.c-nav a {
  font-size: var(--text-sm);
  font-weight: 500;
  position: relative;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: var(--color-text);
  transition: -webkit-text-fill-color .25s ease;
}
.c-nav a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%) scale(0);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gradient-brand);
  transition: transform .2s ease;
}
.c-nav a:hover { -webkit-text-fill-color: transparent; }
.c-nav a:hover::after { transform: translateX(-50%) scale(1); }
.c-nav a.is-current {
  -webkit-text-fill-color: transparent;
}
@media (min-width: 1024px) {
  .c-nav { display: flex; }
}

/* --- c-section-head (日英併記) --- */
.c-section-head {
  margin-bottom: var(--space-6);
  max-width: 720px;
}
.c-section-head--center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.c-section-head__eyebrow {
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}
.c-section-head__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
  font-kerning: normal;
  font-feature-settings: "palt" 1;
}
.c-section-head__lead {
  font-size: var(--text-base);
  color: var(--color-text-mute);
  line-height: 1.9;
}
.c-section-head__actions {
  margin-top: var(--space-4);
  display: flex;
  gap: var(--space-2);
}
@media (min-width: 768px) {
  .c-section-head { margin-bottom: var(--space-8); }
  .c-section-head__title { font-size: var(--text-3xl); }
  .c-section-head__lead { font-size: var(--text-lg); }
}

/* --- c-badge (カテゴリバッジ) --- */
.c-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-family: var(--font-jp);
  font-size: var(--text-xs);
  font-weight: 700;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: 6px;
  letter-spacing: 0.04em;
  line-height: 1.5;
}
.c-badge--outline {
  background: transparent;
  color: var(--color-primary);
  box-shadow: inset 0 0 0 1px var(--color-border);
}
.c-badge--soft {
  background: var(--color-bg-cool);
  color: var(--color-primary);
}

/* --- c-meta (日付・著者・読了時間) --- */
.c-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-en);
  font-size: var(--text-xs);
  color: var(--color-text-mute);
  letter-spacing: 0.04em;
}
.c-meta__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.c-meta__item + .c-meta__item::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-border);
  margin-right: var(--space-1);
}
.c-meta__item svg {
  width: 14px;
  height: 14px;
  color: var(--color-text-mute);
}
.c-meta__jp {
  font-family: var(--font-jp);
}

/* --- c-breadcrumb --- */
.c-breadcrumb {
  padding: var(--space-3) 0;
  font-size: var(--text-xs);
  color: var(--color-text-mute);
  line-height: 1.8;
}
.c-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.c-breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.c-breadcrumb__item + .c-breadcrumb__item::before {
  content: '›';
  color: var(--color-border);
  font-size: var(--text-sm);
}
.c-breadcrumb__item a {
  color: var(--color-text-mute);
  transition: color .2s ease;
}
.c-breadcrumb__item a:hover { color: var(--color-primary); }
.c-breadcrumb__item[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 500;
}

/* --- c-article-card (記事カード) --- */
.c-article-card {
  display: flex;
  flex-direction: column;
  background: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.c-article-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-strong);
}
.c-article-card__visual {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg-soft);
}
.c-article-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.c-article-card:hover .c-article-card__image {
  transform: scale(1.04);
}
.c-article-card__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-2);
  padding: var(--space-3);
}
.c-article-card__badge {
  align-self: flex-start;
}
.c-article-card__title {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.55;
  color: var(--color-primary);
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  letter-spacing: 0.02em;
}
.c-article-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-mute);
  line-height: 1.85;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.c-article-card__meta {
  margin-top: auto;
  padding-top: var(--space-1);
}

/* Featured variant (横長大型・特集記事用) */
.c-article-card--featured {
  box-shadow: var(--shadow-card-strong);
}
@media (min-width: 1024px) {
  .c-article-card--featured {
    display: grid;
    grid-template-columns: 3fr 2fr;
    align-items: stretch;
  }
  .c-article-card--featured .c-article-card__visual {
    aspect-ratio: auto;
    height: 100%;
    min-height: 380px;
  }
  .c-article-card--featured .c-article-card__body {
    padding: var(--space-6);
    gap: var(--space-3);
    justify-content: center;
  }
  .c-article-card--featured .c-article-card__title {
    font-size: var(--text-2xl);
    line-height: 1.45;
  }
  .c-article-card--featured .c-article-card__excerpt {
    font-size: var(--text-base);
    -webkit-line-clamp: 3;
  }
}

/* ===== 6. Project (p-) ===== */

/* --- p-hero-media (メディアトップのヒーロー) --- */
.p-hero-media {
  padding: var(--space-6) 0 var(--space-8);
  background: #ffffff;
}
.p-hero-media__eyebrow {
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-2);
}
.p-hero-media__intro {
  max-width: 720px;
  margin: 0 auto var(--space-6);
  text-align: center;
}
.p-hero-media__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  margin-bottom: var(--space-2);
}
.p-hero-media__lead {
  font-size: var(--text-base);
  color: var(--color-text-mute);
  line-height: 1.9;
}
@media (min-width: 768px) {
  .p-hero-media { padding: var(--space-12) 0; }
  .p-hero-media__title { font-size: var(--text-3xl); }
  .p-hero-media__lead { font-size: var(--text-lg); }
}
@media (min-width: 1024px) {
  .p-hero-media__title { font-size: 3rem; }
}

/* --- p-category-nav (カテゴリの円アイコン6個) --- */
.p-category-nav__list {
  display: grid;
  gap: var(--space-3) var(--space-2);
  grid-template-columns: repeat(3, 1fr);
}
.p-category-nav__item a {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-1);
  transition: transform .2s ease;
}
.p-category-nav__item a:hover { transform: translateY(-2px); }
.p-category-nav__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  color: #ffffff;
  background: var(--gradient-brand);
  border-radius: 50%;
  box-shadow: var(--shadow-card);
}
.p-category-nav__icon svg {
  width: 30px;
  height: 30px;
}
.p-category-nav__name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.5;
}
.p-category-nav__en {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  color: var(--color-text-mute);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
@media (min-width: 768px) {
  .p-category-nav__list {
    grid-template-columns: repeat(6, 1fr);
  }
  .p-category-nav__icon {
    width: 88px;
    height: 88px;
  }
  .p-category-nav__icon svg {
    width: 36px;
    height: 36px;
  }
  .p-category-nav__name { font-size: var(--text-base); }
}

/* --- p-latest (最新記事グリッド) --- */
.p-latest__list {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
.p-latest__footer {
  margin-top: var(--space-6);
  display: flex;
  justify-content: center;
}
@media (min-width: 768px) {
  .p-latest__list {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
}
@media (min-width: 1024px) {
  .p-latest__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- p-ranking (人気記事・グラデ大数字) --- */
.p-ranking__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 880px;
  margin: 0 auto;
}
.p-ranking__item {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-card);
  display: grid;
  grid-template-columns: 56px 1fr;
  align-items: center;
  gap: var(--space-3);
  transition: transform .2s ease, box-shadow .2s ease;
}
.p-ranking__item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-strong);
}
.p-ranking__item a {
  display: contents;
}
.p-ranking__number {
  font-family: var(--font-en);
  font-size: 2.25rem;
  font-weight: 700;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  letter-spacing: -0.02em;
  text-align: center;
}
.p-ranking__body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.p-ranking__title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.55;
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  letter-spacing: 0.02em;
}
.p-ranking__meta {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
}
@media (min-width: 768px) {
  .p-ranking__item {
    grid-template-columns: 80px 1fr;
    padding: var(--space-4);
    gap: var(--space-4);
  }
  .p-ranking__number { font-size: 2.75rem; }
  .p-ranking__title { font-size: var(--text-lg); }
}

/* --- p-newsletter (メルマガ購読CTA帯) --- */
.p-newsletter {
  background: var(--gradient-brand);
  color: var(--color-text-on-brand);
  padding: var(--space-8) 0;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.p-newsletter::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 14% 18%, rgba(255, 255, 255, 0.16), transparent 45%),
    radial-gradient(circle at 86% 90%, rgba(255, 255, 255, 0.12), transparent 50%);
  pointer-events: none;
  z-index: -1;
}
.p-newsletter__inner {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}
.p-newsletter__eyebrow {
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}
.p-newsletter__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.45;
  margin-bottom: var(--space-2);
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  letter-spacing: 0.02em;
}
.p-newsletter__lead {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.85;
  margin-bottom: var(--space-4);
}
.p-newsletter__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 520px;
  margin: 0 auto;
}
.p-newsletter__input {
  font-family: var(--font-jp);
  font-size: var(--text-base);
  color: var(--color-text);
  padding: var(--space-2);
  background: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-sm);
  min-height: 52px;
  width: 100%;
}
.p-newsletter__input:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.35);
}
.p-newsletter__submit {
  background: var(--color-primary);
  color: #ffffff;
}
.p-newsletter__submit:hover {
  background: var(--color-primary-hover);
}
.p-newsletter__agreement {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.85);
  margin-top: var(--space-1);
}
.p-newsletter__agreement input {
  width: 16px;
  height: 16px;
  accent-color: #ffffff;
}
.p-newsletter__agreement a {
  color: #ffffff;
  text-decoration: underline;
}
.p-newsletter__done {
  margin-top: var(--space-3);
  padding: var(--space-2);
  background: rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: #ffffff;
  font-weight: 500;
}
@media (min-width: 768px) {
  .p-newsletter { padding: var(--space-12) 0; }
  .p-newsletter__title { font-size: var(--text-2xl); }
  .p-newsletter__lead { font-size: var(--text-base); }
  .p-newsletter__form {
    flex-direction: row;
    align-items: stretch;
  }
  .p-newsletter__input { flex: 1; }
  .p-newsletter__submit { min-width: 160px; }
}

/* --- p-article (記事詳細・2カラム) --- */
.p-article__header {
  padding: var(--space-6) 0 var(--space-4);
}
.p-article__header-inner {
  max-width: var(--container-narrow);
  margin: 0 auto;
}
.p-article__badge-row {
  margin-bottom: var(--space-3);
}
.p-article__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.45;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-3);
  font-kerning: normal;
  font-feature-settings: "palt" 1;
}
.p-article__meta {
  margin-bottom: var(--space-4);
}
.p-article__hero-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  background: var(--color-bg-soft);
}
@media (min-width: 768px) {
  .p-article__title { font-size: var(--text-3xl); }
  .p-article__header { padding: var(--space-8) 0 var(--space-6); }
}
@media (min-width: 1024px) {
  .p-article__hero-image {
    aspect-ratio: 2.4 / 1;
  }
}

.p-article__layout {
  padding: var(--space-4) 0 var(--space-8);
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}
@media (min-width: 1024px) {
  .p-article__layout {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: var(--space-8);
    padding: var(--space-6) 0 var(--space-12);
  }
}

.p-article__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
@media (min-width: 1024px) {
  .p-article__aside {
    position: sticky;
    top: 96px;
    align-self: start;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
  }
}

/* --- p-article__toc (目次) --- */
.p-article__toc {
  background: var(--color-bg-soft);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.p-article__toc-summary {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.p-article__toc-summary::-webkit-details-marker { display: none; }
.p-article__toc-summary::after {
  content: '+';
  font-size: var(--text-lg);
  color: var(--color-primary);
}
details[open] .p-article__toc-summary::after { content: '−'; }
@media (min-width: 1024px) {
  .p-article__toc-summary { cursor: default; }
  .p-article__toc-summary::after { content: ''; }
}
.p-article__toc-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.p-article__toc-list a {
  display: block;
  padding: 6px 10px;
  font-size: var(--text-sm);
  color: var(--color-text-mute);
  line-height: 1.6;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}
.p-article__toc-list a:hover {
  color: var(--color-primary);
  background: rgba(69, 120, 216, 0.06);
}
.p-article__toc-list a.is-active {
  color: var(--color-primary);
  font-weight: 700;
  border-left-color: var(--color-brand-aqua);
  background: rgba(42, 170, 221, 0.08);
}

.p-article__aside-heading {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.p-article__mini-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.p-article__mini-item a {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--space-2);
  align-items: center;
  transition: opacity .2s ease;
}
.p-article__mini-item a:hover { opacity: 0.75; }
.p-article__mini-visual {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: var(--color-bg-soft);
}
.p-article__mini-title {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- p-article__body (本文スタイル) --- */
.p-article__body {
  max-width: var(--container-article);
  font-size: var(--text-base);
  line-height: 1.95;
  color: var(--color-text);
}
.p-article__body > * + * { margin-top: var(--space-3); }
.p-article__body p { font-size: var(--text-base); }
.p-article__body h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.5;
  letter-spacing: 0.02em;
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  padding-left: var(--space-3);
  border-left: 4px solid var(--color-brand-aqua);
  scroll-margin-top: 96px;
}
.p-article__body h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.55;
  letter-spacing: 0.02em;
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  margin-top: var(--space-4);
  scroll-margin-top: 96px;
}
.p-article__body ul,
.p-article__body ol {
  padding-left: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.p-article__body ul li {
  position: relative;
  padding-left: var(--space-2);
  list-style: none;
}
.p-article__body ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gradient-brand);
}
.p-article__body ol { list-style: decimal; padding-left: var(--space-4); }
.p-article__body ol li { padding-left: var(--space-1); }
.p-article__body blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-soft);
  border-left: 4px solid var(--color-brand-aqua);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-primary);
  font-size: var(--text-base);
  line-height: 1.9;
  font-weight: 500;
}
.p-article__body strong {
  color: var(--color-primary);
  font-weight: 700;
}
.p-article__body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s ease;
}
.p-article__body a:hover { color: var(--color-primary-hover); }
.p-article__body img {
  width: 100%;
  border-radius: var(--radius-md);
  margin: var(--space-3) 0;
}
@media (min-width: 768px) {
  .p-article__body { font-size: var(--text-lg); }
  .p-article__body h2 { font-size: var(--text-2xl); }
  .p-article__body h3 { font-size: var(--text-xl); }
}

/* --- p-article__share (シェアボタン) --- */
.p-article__share {
  max-width: var(--container-article);
  margin: var(--space-8) auto 0;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}
.p-article__share-label {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-mute);
}
.p-article__share-list {
  display: flex;
  gap: var(--space-2);
}
.p-article__share-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg-cool);
  color: var(--color-primary);
  transition: background .2s ease, color .2s ease, transform .15s ease;
}
.p-article__share-btn:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-1px);
}
.p-article__share-btn svg { width: 18px; height: 18px; }
.p-article__share-btn.is-copied {
  background: var(--color-brand-aqua);
  color: #ffffff;
}

/* --- p-author-card (著者プロフィール) --- */
.p-author-card {
  max-width: var(--container-article);
  margin: var(--space-6) auto 0;
  padding: var(--space-4);
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
}
.p-author-card__avatar {
  width: 86px;
  height: 86px;
  border-radius: 50%;
  object-fit: cover;
  background: #ffffff;
}
.p-author-card__name {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
}
.p-author-card__role {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  color: var(--color-text-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.p-author-card__bio {
  font-size: var(--text-sm);
  color: var(--color-text-mute);
  line-height: 1.9;
  max-width: 560px;
}
@media (min-width: 768px) {
  .p-author-card {
    flex-direction: row;
    text-align: left;
    gap: var(--space-4);
    align-items: center;
  }
  .p-author-card__meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
}

/* --- p-related (関連記事) --- */
.p-related__list {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .p-related__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- p-pagination --- */
.p-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-8);
}
.p-pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  padding: 0 var(--space-2);
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.p-pagination__link:hover {
  background: var(--color-bg-cool);
  border-color: var(--color-primary);
}
.p-pagination__link--current {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  pointer-events: none;
}
.p-pagination__link--disabled {
  color: var(--color-border);
  pointer-events: none;
}

/* --- p-category-hero (カテゴリページヘッダー) --- */
.p-category-hero {
  padding: var(--space-6) 0 var(--space-8);
  background: var(--color-bg-soft);
}
.p-category-hero__inner {
  max-width: 800px;
  margin: 0 auto;
}
.p-category-hero__eyebrow {
  font-family: var(--font-en);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-brand-blue);
  margin-bottom: var(--space-2);
}
.p-category-hero__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.4;
  letter-spacing: 0.02em;
  font-kerning: normal;
  font-feature-settings: "palt" 1;
  margin-bottom: var(--space-3);
}
.p-category-hero__lead {
  font-size: var(--text-base);
  color: var(--color-text-mute);
  line-height: 1.9;
  margin-bottom: var(--space-4);
}
.p-category-hero__count {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  color: var(--color-primary);
}
.p-category-hero__count-number {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1;
}
.p-category-hero__count-unit {
  font-family: var(--font-jp);
  font-size: var(--text-base);
  font-weight: 700;
}
@media (min-width: 768px) {
  .p-category-hero { padding: var(--space-12) 0; }
  .p-category-hero__title { font-size: var(--text-3xl); }
  .p-category-hero__lead { font-size: var(--text-lg); }
  .p-category-hero__count-number { font-size: 3rem; }
}

/* --- p-category-list (カテゴリページの記事一覧) --- */
.p-category-list__grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) {
  .p-category-list__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
}
@media (min-width: 1024px) {
  .p-category-list__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   Footer (LPから流用)
   ============================================================ */
.p-footer {
  background: var(--color-primary-deep);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-8) 0 var(--space-4);
}
.p-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.p-footer__top {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.p-footer__brand-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.p-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.5rem;
  color: #ffffff;
  letter-spacing: 0.02em;
}
.p-footer__brand-mark {
  display: inline-block;
  width: 16px;
  height: 16px;
  background: var(--gradient-brand);
  border-radius: 4px;
}
.p-footer__tagline {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.08em;
}
.p-footer__nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.p-footer__nav-list a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  transition: color .2s ease;
}
.p-footer__nav-list a:hover { color: #ffffff; }
.p-footer__bottom {
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  align-items: center;
  text-align: center;
}
.p-footer__copyright {
  font-family: var(--font-en);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.03em;
}
.p-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
}
.p-footer__legal a {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.55);
  transition: color .2s ease;
}
.p-footer__legal a:hover { color: #ffffff; }
@media (min-width: 768px) {
  .p-footer { padding: var(--space-12) 0 var(--space-4); }
  .p-footer__top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-8);
  }
  .p-footer__bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

/* ============================================================
   prefers-reduced-motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}