@charset "UTF-8";
/* ============================================================
   夜ノート（yorunote.jp）スタイルシート
   静的HTMLサイト用 ／ 接頭辞：yrn-
   Webフォント・外部ライブラリ・JavaScriptは使いません
   ============================================================ */

/* ---------- 0. リセット（最小限） ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
img, picture, svg { max-width: 100%; }
img { height: auto; }
ul, ol { margin: 0; padding: 0; }
figure { margin: 0; }
a { color: inherit; }
table { border-collapse: collapse; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    opacity: 1 !important;
    filter: none !important;
    transform: none !important;
  }
}

/* ---------- 1. デザイントークン ---------- */
:root {
  /* 夜明け前の水面。紙は灰みの白、墨は青みのチャコール、
     差し色は「水の藍」と「灯りのアンバー」の2本立て。 */
  --yrn-bg:          #F2F1EE; /* 紙：基本背景 */
  --yrn-bg-warm:     #E9E9E6; /* 霧：セクション交互（名前は互換のため据え置き） */
  --yrn-paper:       #FBFBFA; /* 表・カードの地 */
  --yrn-ink:         #23272C; /* 本文（対bg 約14.5:1） */
  --yrn-ink-sub:     #5E6670; /* 副文（約5.2:1） */
  --yrn-heading:     #2A3542; /* 藍鼠：見出し（約11.0:1） */
  --yrn-accent:      #3E5C6B; /* 水の藍：リンク・ボタン（約6.3:1） */
  --yrn-accent-dark: #2E4653; /* 押下・hover */
  --yrn-accent-soft: #DCE6E9; /* 面で使う淡い水色 */
  --yrn-lavender:    #5C6480; /* 藍紫：分類ラベル（約5.6:1） */
  --yrn-lamp:        #B8862F; /* 灯りのアンバー：あかり関連の差し色（約4.6:1） */
  --yrn-lamp-soft:   #F0E4CE;
  --yrn-line:        #E0DFDA; /* 罫線 */
  --yrn-line-soft:   #ECEBE7;
  --yrn-night:       #151A20; /* 夜：ヒーロー地・フッター */
  --yrn-night-2:     #1F272F;

  --yrn-font-sans: "Hiragino Sans", "ヒラギノ角ゴシック", "Hiragino Kaku Gothic ProN",
                   "Yu Gothic Medium", "游ゴシック Medium", YuGothic, "Noto Sans JP",
                   system-ui, -apple-system, sans-serif;
  --yrn-font-serif: "Hiragino Mincho ProN", "ヒラギノ明朝 ProN", "Yu Mincho", "游明朝",
                    YuMincho, "Noto Serif JP", serif;

  --yrn-radius: 4px;
  --yrn-maxw: 1180px;
  --yrn-maxw-text: 42rem;
  --yrn-gutter: clamp(16px, 4vw, 32px);
}

/* ---------- 1-2. 空気のレイヤー ----------
   画面の奥で、水面のような淡いにじみをごく緩やかに動かします。
   JavaScriptは使いません。動きが苦手な方には停止します（末尾の指定）。 */
html { background: var(--yrn-bg); }

body::before {
  content: "";
  position: fixed;
  inset: -20vmax;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(38% 30% at 22% 26%, rgba(120,150,168,.20), rgba(120,150,168,0) 68%),
    radial-gradient(32% 26% at 78% 20%, rgba(184,134,47,.11),  rgba(184,134,47,0)  70%),
    radial-gradient(44% 34% at 62% 74%, rgba(92,100,128,.15),  rgba(92,100,128,0)  70%),
    radial-gradient(30% 24% at 12% 82%, rgba(120,150,168,.13), rgba(120,150,168,0) 70%);
  animation: yrn-drift 72s ease-in-out infinite alternate;
  will-change: transform;
}
@keyframes yrn-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(2.2%, -1.6%, 0) scale(1.06); }
  100% { transform: translate3d(-1.8%, 1.4%, 0) scale(1.03); }
}

/* ---------- 2. ベース ---------- */
body {
  background: transparent;
  color: var(--yrn-ink);
  font-family: var(--yrn-font-sans);
  font-size: 16px;
  line-height: 1.9;
  font-feature-settings: "palt" 1;
  -webkit-font-smoothing: antialiased;
}

.yrn-wrap {
  max-width: var(--yrn-maxw);
  margin-inline: auto;
  padding-inline: var(--yrn-gutter);
}
.yrn-wrap--text { max-width: calc(var(--yrn-maxw-text) + var(--yrn-gutter) * 2); }

:where(a):focus-visible,
:where(button):focus-visible,
:where(input, textarea, select):focus-visible {
  outline: 2px solid var(--yrn-accent);
  outline-offset: 3px;
}

.yrn-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--yrn-paper);
  color: var(--yrn-ink);
  padding: 10px 16px;
  z-index: 100;
}
.yrn-skip:focus { left: 8px; top: 8px; }

.yrn-vh {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* ---------- 3. ヘッダー ---------- */
.yrn-header {
  background: color-mix(in srgb, var(--yrn-bg) 84%, transparent);
  backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: 1px solid var(--yrn-line-soft);
  position: sticky;
  top: 0;
  z-index: 50;
}
.yrn-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
  padding-block: 14px;
}
.yrn-logo {
  font-family: var(--yrn-font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--yrn-heading);
  text-decoration: none;
  line-height: 1.3;
}
.yrn-logo small {
  display: block;
  font-family: var(--yrn-font-sans);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  color: var(--yrn-ink-sub);
  margin-top: 3px;
}
.yrn-gnav { margin-left: auto; }
.yrn-gnav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  list-style: none;
  font-size: 14px;
}
.yrn-gnav a {
  text-decoration: none;
  color: var(--yrn-ink);
  padding-block: 4px;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, color .2s ease;
}
.yrn-gnav a:hover { color: var(--yrn-accent); border-bottom-color: var(--yrn-accent); }
.yrn-gnav a[aria-current="page"] { border-bottom-color: var(--yrn-accent); }

@media (max-width: 599px) {
  .yrn-gnav { margin-left: 0; width: 100%; }
  .yrn-gnav ul { gap: 2px 16px; font-size: 13.5px; }
}

/* ---------- 4. ヒーロー ---------- */
.yrn-hero { background: transparent; padding-block: 0 clamp(40px, 7vw, 76px); }

.yrn-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
}
@media (min-width: 900px) {
  .yrn-hero { padding-block: clamp(40px, 4.5vw, 76px) clamp(56px, 6vw, 96px); }
  .yrn-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: center;
  }
  .yrn-hero__body  { order: 1; }
  .yrn-hero__media { order: 2; }
}

.yrn-hero__media {
  position: relative;
  overflow: hidden;
  border-radius: var(--yrn-radius);
  /* 画像未設定時のフォールバック（夜の地色）。画像を入れたら見えなくなります */
  background:
    radial-gradient(58% 42% at 36% 28%, rgba(214, 168, 104, .34), rgba(214, 168, 104, 0) 72%),
    linear-gradient(168deg, #27313C 0%, var(--yrn-night) 60%, #0F1318 100%);
}
/* 水面のゆらぎ。画像の上を、ごく淡い光がゆっくり渡ります。 */
.yrn-hero__media::before {
  content: "";
  position: absolute;
  inset: -30%;
  z-index: 1;
  pointer-events: none;
  mix-blend-mode: soft-light;
  background:
    radial-gradient(40% 26% at 30% 34%, rgba(255,244,224,.55), rgba(255,244,224,0) 70%),
    radial-gradient(34% 22% at 72% 62%, rgba(150,186,205,.45), rgba(150,186,205,0) 72%);
  animation: yrn-ripple 26s ease-in-out infinite alternate;
}
@keyframes yrn-ripple {
  0%   { transform: translate3d(0,0,0) scale(1); opacity: .9; }
  100% { transform: translate3d(4%, -3%, 0) scale(1.12); opacity: .65; }
}
.yrn-hero__media img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
@media (min-width: 900px) {
  .yrn-hero__media img { aspect-ratio: 4 / 5; }
}
.yrn-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 38%;
  background: linear-gradient(to top, rgba(31,27,25,.55), rgba(31,27,25,0));
  pointer-events: none;
}
.yrn-hero__caption {
  position: absolute;
  right: 12px; bottom: 10px;
  z-index: 1;
  color: rgba(255,255,255,.8);
  font-size: 11px;
  letter-spacing: .08em;
}
/* 画像が入るまでの仮置き（画像を入れたら .yrn-hero__ph の span ごと削除） */
.yrn-hero__ph {
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  aspect-ratio: 4 / 3;
  padding: 14px;
}
.yrn-hero__ph::after {
  content: "画像は準備中です";
  color: rgba(255,255,255,.62);
  font-size: 11.5px;
  letter-spacing: .08em;
}
@media (min-width: 900px) { .yrn-hero__ph { aspect-ratio: 4 / 5; min-height: 460px; } }

.yrn-hero__body { max-width: 40em; }

.yrn-eyebrow {
  margin: 0 0 14px;
  color: var(--yrn-lavender);
  font-size: 13px;
  letter-spacing: .18em;
  line-height: 1.6;
}
.yrn-eyebrow::before {
  content: "";
  display: inline-block;
  width: 40px; height: 1px;
  margin-right: 12px;
  vertical-align: .35em;
  background: linear-gradient(90deg, var(--yrn-lavender), rgba(92,100,128,0));
}

.yrn-hero__title {
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-family: var(--yrn-font-serif);
  font-weight: 600;
  font-size: clamp(29px, 6.6vw, 54px);
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--yrn-heading);
  animation: yrn-emerge 1.5s cubic-bezier(.2,.75,.25,1) both;
}
@keyframes yrn-emerge {
  from { opacity: 0; transform: translateY(14px); filter: blur(3px); }
  to   { opacity: 1; transform: none; filter: none; }
}
.yrn-hero__lead {
  margin: 0 0 16px;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.95;
}
.yrn-hero__lead strong {
  font-weight: 600;
  background: linear-gradient(transparent 60%, var(--yrn-accent-soft) 60%, rgba(220,230,233,0) 100%);
  padding: 0 3px;
}
.yrn-hero__sub {
  margin: 0 0 clamp(26px, 4vw, 34px);
  font-size: 15px;
  line-height: 1.9;
  color: var(--yrn-ink-sub);
}

/* カテゴリー入口カード */
.yrn-entry {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0 0 clamp(22px, 3.5vw, 30px);
}
@media (min-width: 560px) { .yrn-entry { grid-template-columns: 1fr 1fr; gap: 14px; } }

.yrn-entry__link {
  position: relative;
  display: block;
  height: 100%;
  padding: 20px 44px 20px 20px;
  background: var(--yrn-paper);
  border: 1px solid var(--yrn-line);
  border-radius: var(--yrn-radius);
  text-decoration: none;
  transition: border-color .22s ease, transform .22s ease, box-shadow .22s ease;
}
.yrn-entry__link:hover, .yrn-entry__link:focus-visible {
  border-color: var(--yrn-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 34px -14px rgba(42,53,66,.30);
}
.yrn-entry__name {
  display: block;
  font-family: var(--yrn-font-serif);
  font-size: 21px;
  line-height: 1.4;
  letter-spacing: .1em;
  color: var(--yrn-heading);
}
.yrn-entry__sub {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--yrn-lavender);
}
.yrn-entry__desc {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--yrn-ink-sub);
}
.yrn-entry__arrow {
  position: absolute;
  right: 18px; top: 50%;
  transform: translateY(-50%);
  color: var(--yrn-accent);
  font-size: 15px;
  transition: transform .22s ease;
}
.yrn-entry__link:hover .yrn-entry__arrow { transform: translateY(-50%) translateX(3px); }

.yrn-hero__note {
  margin: 0 0 10px;
  padding-top: 18px;
  border-top: 1px solid var(--yrn-line);
  font-size: 13px;
  line-height: 1.85;
  color: var(--yrn-ink-sub);
}
.yrn-hero__note b { font-weight: 600; color: var(--yrn-ink); }
.yrn-hero__note a { color: var(--yrn-accent); text-underline-offset: 3px; }

/* 広告・アフィリエイトの開示（Amazon運営規約 第5条に対応。削除しないこと） */
.yrn-disclosure {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--yrn-ink-sub);
}

/* ---------- 5. セクション共通 ---------- */
.yrn-section { padding-block: clamp(44px, 7vw, 86px); }
/* 背景の切り替わりを、境目のない「霧」にする */
.yrn-section--warm {
  background: linear-gradient(180deg,
    rgba(233,233,230,0) 0%,
    var(--yrn-bg-warm) 9%,
    var(--yrn-bg-warm) 91%,
    rgba(233,233,230,0) 100%);
}
.yrn-section--night {
  background:
    radial-gradient(70% 50% at 50% 0%, rgba(184,134,47,.13), rgba(184,134,47,0) 72%),
    var(--yrn-night);
  color: #EDEFF2;
}
.yrn-section--night .yrn-section__title { color: #EDEFF2; }
.yrn-section--night .yrn-section__desc { color: #BFC7CF; }
.yrn-section--night .yrn-eyebrow { color: #A9BCC7; }
.yrn-section--night .yrn-eyebrow::before { background: #A9BCC7; }

.yrn-section__head { margin-bottom: clamp(24px, 4vw, 40px); max-width: 44em; }
.yrn-section__title {
  margin: 0 0 12px;
  font-family: var(--yrn-font-serif);
  font-weight: 600;
  font-size: clamp(22px, 4.2vw, 32px);
  line-height: 1.6;
  letter-spacing: .07em;
  color: var(--yrn-heading);
}
.yrn-section__desc { margin: 0; font-size: 15px; line-height: 1.9; color: var(--yrn-ink-sub); }

/* ---------- 6. 「このサイトの見方」 ---------- */
.yrn-howto {
  display: grid;
  gap: 14px;
  list-style: none;
}
@media (min-width: 760px) { .yrn-howto { grid-template-columns: repeat(3, 1fr); gap: 18px; } }

.yrn-howto__item {
  background: var(--yrn-paper);
  border: 1px solid var(--yrn-line);
  border-radius: var(--yrn-radius);
  padding: 22px 20px;
}
.yrn-howto__label { margin: 0 0 10px; }
.yrn-howto__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--yrn-heading);
}
.yrn-howto__text { margin: 0; font-size: 13.5px; line-height: 1.85; color: var(--yrn-ink-sub); }

/* 記事種別ラベル */
.yrn-label {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 2px;
  font-size: 11.5px;
  letter-spacing: .06em;
  line-height: 1.6;
  white-space: nowrap;
}
.yrn-label--guide  { background: var(--yrn-accent-soft); color: #2E4653; }
.yrn-label--spec   { background: #DEDCE6; color: #453F5E; }
.yrn-label--read   { background: var(--yrn-lamp-soft); color: #6B4E17; }
.yrn-label--used   { background: #D5E0DA; color: #2F4D3C; }

/* ---------- 7. 記事リスト ---------- */
.yrn-posts { display: grid; gap: 0; list-style: none; }
.yrn-posts__item { border-bottom: 1px solid var(--yrn-line); }
.yrn-posts__item:first-child { border-top: 1px solid var(--yrn-line); }

.yrn-posts__link {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 4px;
  text-decoration: none;
  transition: background-color .2s ease;
}
.yrn-posts__link:hover { background: rgba(255,255,255,.55); }
@media (min-width: 760px) {
  .yrn-posts__link { grid-template-columns: 150px minmax(0, 1fr); gap: 24px; padding: 22px 4px; }
}
.yrn-posts__thumb {
  border-radius: 3px;
  overflow: hidden;
  background: linear-gradient(160deg, #2C3A46, #161C22);
}
.yrn-posts__thumb img { transition: transform .9s cubic-bezier(.2,.75,.25,1); }
.yrn-posts__link:hover .yrn-posts__thumb img { transform: scale(1.045); }
.yrn-posts__thumb img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
/* 画像が未設定の記事の仮置き（画像を入れたら --ph を外して img を入れる） */
.yrn-posts__thumb--ph { aspect-ratio: 4 / 3; }
.yrn-posts__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 8px; }
.yrn-posts__date { font-size: 12px; color: var(--yrn-ink-sub); letter-spacing: .04em; }
.yrn-posts__title {
  margin: 0 0 6px;
  font-size: clamp(15px, 2.3vw, 18px);
  font-weight: 600;
  line-height: 1.65;
  color: var(--yrn-ink);
}
.yrn-posts__link:hover .yrn-posts__title { color: var(--yrn-accent); }
.yrn-posts__excerpt {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--yrn-ink-sub);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 夜のセクション（暗い背景）に記事リストを置く場合 */
.yrn-section--night .yrn-posts__item,
.yrn-section--night .yrn-posts__item:first-child { border-color: rgba(255,255,255,.14); }
.yrn-section--night .yrn-posts__title { color: #EDEFF2; }
.yrn-section--night .yrn-posts__excerpt,
.yrn-section--night .yrn-posts__date { color: #A4ACB5; }
.yrn-section--night .yrn-posts__link:hover { background: rgba(255,255,255,.05); }
.yrn-section--night .yrn-posts__link:hover .yrn-posts__title { color: #CBDDE6; }

/* 記事が無い間の正直な表示（記事が入ったら削除） */
.yrn-empty {
  background: var(--yrn-paper);
  border: 1px dashed var(--yrn-line);
  border-radius: var(--yrn-radius);
  padding: 28px 20px;
  text-align: center;
  color: var(--yrn-ink-sub);
  font-size: 14px;
  line-height: 1.9;
}
.yrn-empty b { display: block; color: var(--yrn-ink); font-size: 15px; margin-bottom: 6px; }

/* ---------- 8. ボタン ---------- */
.yrn-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 22px;
  border: 1px solid var(--yrn-accent);
  border-radius: 3px;
  background: var(--yrn-accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color .2s ease, border-color .2s ease;
}
.yrn-btn:hover { background: var(--yrn-accent-dark); border-color: var(--yrn-accent-dark); }
.yrn-btn--ghost { background: transparent; color: var(--yrn-accent); }
.yrn-btn--ghost:hover { background: var(--yrn-accent); color: #fff; }
.yrn-btn--block { width: 100%; }

.yrn-more { margin-top: 26px; }

/* 購入リンク群（楽天／Amazon） */
.yrn-shop {
  display: grid;
  gap: 10px;
  margin: 20px 0 10px;
}
@media (min-width: 560px) { .yrn-shop { grid-template-columns: 1fr 1fr; } }
.yrn-shop__note { margin: 0; font-size: 12px; line-height: 1.8; color: var(--yrn-ink-sub); }

/* ---------- 9. 仕様比較表 ---------- */
.yrn-spec { margin: 28px 0; }
.yrn-spec__scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--yrn-line);
  border-radius: var(--yrn-radius);
  background: var(--yrn-paper);
}
.yrn-spec table { width: 100%; min-width: 640px; font-size: 13.5px; line-height: 1.7; }
.yrn-spec caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 10px;
  font-size: 13px;
  color: var(--yrn-ink-sub);
}
.yrn-spec th, .yrn-spec td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--yrn-line-soft);
  text-align: left;
  vertical-align: top;
}
.yrn-spec thead th {
  background: var(--yrn-bg-warm);
  font-weight: 600;
  color: var(--yrn-heading);
  white-space: nowrap;
  position: sticky;
  top: 0;
}
.yrn-spec tbody th {
  font-weight: 600;
  white-space: nowrap;
  background: #F7F7F5;
  color: var(--yrn-ink);
}
.yrn-spec tr:last-child th, .yrn-spec tr:last-child td { border-bottom: 0; }
.yrn-spec__hint { margin: 10px 0 0; font-size: 12px; color: var(--yrn-ink-sub); }

/* 商品を横に並べる比較表は、本文の幅より広く使う（広い画面のみ） */
@media (min-width: 1000px) {
  .yrn-spec--wide {
    width: min(1120px, calc(100vw - var(--yrn-gutter) * 2));
    margin-left: 50%;
    transform: translateX(-50%);
  }
}
.yrn-spec--wide table { min-width: 760px; }

/* 値の出どころ（公表値／実測値／使用感）を区別するマーク */
.yrn-src {
  display: inline-block;
  margin-left: 4px;
  padding: 1px 5px;
  border-radius: 2px;
  font-size: 10.5px;
  letter-spacing: .04em;
  vertical-align: 1px;
}
.yrn-src--pub  { background: #E6E3EE; color: #4E4866; } /* メーカー公表値 */
.yrn-src--meas { background: #DEE7DF; color: #31513C; } /* 実測値 */
.yrn-src--subj { background: #F0E2DC; color: #6B423C; } /* 主観的な使用感 */

/* ---------- 9-2. 商品画像（楽天APIが返すもの） ----------
   楽天の商品画像は、楽天アフィリエイトのリンクと一緒に掲載します。
   画像は必ず <a> で affiliateUrl に包み、出どころを添えてください。
   自分で撮った写真ではないので「実物を確認した」とは書かないこと。 */
.yrn-shots {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  margin: 24px 0 14px;
  list-style: none;
}
.yrn-shot { margin: 0; }
.yrn-shot a {
  display: block;
  text-decoration: none;
  border: 1px solid var(--yrn-line);
  border-radius: var(--yrn-radius);
  background: var(--yrn-paper);
  overflow: hidden;
  transition: border-color .22s ease, box-shadow .3s ease;
}
.yrn-shot a:hover, .yrn-shot a:focus-visible {
  border-color: var(--yrn-accent);
  box-shadow: 0 10px 30px -16px rgba(42,53,66,.34);
}
.yrn-shot img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  background: #fff;
  padding: 10px;
}
.yrn-shot figcaption {
  padding: 9px 11px 11px;
  border-top: 1px solid var(--yrn-line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--yrn-ink);
}
.yrn-shot figcaption span {
  display: block;
  margin-top: 3px;
  font-size: 11.5px;
  color: var(--yrn-ink-sub);
}
.yrn-shots__credit {
  margin: 0 0 24px;
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--yrn-ink-sub);
}

/* ---------- 10. 検証方法ブロック ---------- */
.yrn-method {
  margin: 32px 0;
  padding: 22px 24px;
  background:
    linear-gradient(180deg, rgba(220,230,233,.34), rgba(220,230,233,0) 60%),
    var(--yrn-paper);
  border: 1px solid var(--yrn-line);
  border-left: 2px solid var(--yrn-accent);
  border-radius: var(--yrn-radius);
}
.yrn-method__title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--yrn-heading);
}
.yrn-method dl { margin: 0; font-size: 13.5px; line-height: 1.85; }
.yrn-method dt { font-weight: 600; color: var(--yrn-ink); margin-top: 8px; }
.yrn-method dt:first-child { margin-top: 0; }
.yrn-method dd { margin: 0 0 0 0; color: var(--yrn-ink-sub); }

/* ---------- 11. 広告枠 ---------- */
.yrn-ad {
  margin: 40px auto;
  max-width: 728px;
  text-align: center;
}
.yrn-ad__label {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--yrn-ink-sub);
}
/* 比較表・購入ボタンの近くに広告を置かないこと（誤クリック防止） */

/* ---------- 12. 記事本文 ---------- */
.yrn-article { padding-block: clamp(28px, 4vw, 48px) clamp(48px, 7vw, 80px); }

.yrn-breadcrumb { font-size: 12.5px; color: var(--yrn-ink-sub); padding-block: 14px; }
.yrn-breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
.yrn-breadcrumb li:not(:last-child)::after { content: "／"; margin-left: 6px; color: var(--yrn-line); }
.yrn-breadcrumb a { color: var(--yrn-ink-sub); text-decoration: none; }
.yrn-breadcrumb a:hover { color: var(--yrn-accent); text-decoration: underline; }

.yrn-article__head { margin-bottom: clamp(24px, 4vw, 36px); }
.yrn-article__meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin-bottom: 14px; }
.yrn-article__title {
  margin: 0 0 14px;
  font-family: var(--yrn-font-serif);
  font-weight: 600;
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--yrn-heading);
}
.yrn-article__dates { font-size: 12.5px; color: var(--yrn-ink-sub); }
.yrn-article__lead {
  margin: 0;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.95;
}

.yrn-prose { font-size: 16.5px; line-height: 1.95; }
.yrn-prose > * + * { margin-top: 1.6em; }
.yrn-prose h2 {
  margin-top: 2.8em;
  margin-bottom: 1em;
  padding-bottom: .55em;
  border-bottom: 0;
  background: linear-gradient(90deg, var(--yrn-line) 0%, var(--yrn-line) 34%, rgba(224,223,218,0) 100%)
              bottom left / 100% 1px no-repeat;
  font-family: var(--yrn-font-serif);
  font-weight: 600;
  font-size: clamp(20px, 3.4vw, 27px);
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--yrn-heading);
}
.yrn-prose h3 {
  margin-top: 2.2em;
  margin-bottom: .7em;
  font-size: clamp(17px, 2.6vw, 20px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--yrn-heading);
}
.yrn-prose p { margin: 0; }
.yrn-prose ul, .yrn-prose ol { padding-left: 1.4em; }
.yrn-prose li + li { margin-top: .5em; }
/* ボタンは除外する（除外しないと .yrn-btn の文字色を上書きして、
   塗りつぶしボタンが「茶色の地に茶色の文字」になり読めなくなる） */
.yrn-prose a:not(.yrn-btn) { color: var(--yrn-accent); text-underline-offset: 3px; }
.yrn-prose strong { font-weight: 600; }
.yrn-prose figure img { border-radius: 3px; }
.yrn-prose figcaption { margin-top: 8px; font-size: 12.5px; color: var(--yrn-ink-sub); }
.yrn-prose blockquote {
  margin: 0;
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--yrn-line);
  color: var(--yrn-ink-sub);
}

/* 目次（手書きのリンク。JSは使いません） */
.yrn-toc {
  background: var(--yrn-paper);
  border: 1px solid var(--yrn-line);
  border-radius: var(--yrn-radius);
  padding: 20px 22px;
}
.yrn-toc__title { margin: 0 0 10px; font-size: 14px; font-weight: 600; color: var(--yrn-heading); }
.yrn-toc ol { padding-left: 1.3em; font-size: 14px; line-height: 1.9; }
.yrn-toc a { color: var(--yrn-ink); text-decoration: none; }
.yrn-toc a:hover { color: var(--yrn-accent); text-decoration: underline; }

/* ---------- 13. フッター ---------- */
.yrn-footer {
  background:
    radial-gradient(60% 40% at 50% 0%, rgba(184,134,47,.10), rgba(184,134,47,0) 70%),
    var(--yrn-night);
  color: #CFD5DB;
  padding-block: clamp(40px, 6vw, 64px) 28px;
  font-size: 14px;
}
.yrn-footer a { color: #E6EAEE; text-decoration: none; }
.yrn-footer a:hover { text-decoration: underline; }
.yrn-footer__grid { display: grid; gap: 32px; }
@media (min-width: 760px) { .yrn-footer__grid { grid-template-columns: 1.2fr 1fr 1fr; gap: 40px; } }
.yrn-footer__logo {
  font-family: var(--yrn-font-serif);
  font-size: 20px;
  color: #EDEFF2;
  display: inline-block;
  margin-bottom: 10px;
}
.yrn-footer__tag { margin: 0; color: #A4ACB5; font-size: 13px; line-height: 1.9; }
.yrn-footer__heading {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: #8D959E;
}
.yrn-footer ul { list-style: none; font-size: 13.5px; line-height: 2.1; }
.yrn-footer__bottom {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.12);
  font-size: 12px;
  color: #959DA6;
  line-height: 1.9;
}
.yrn-footer__bottom p { margin: 0 0 6px; }

/* ---------- 14. フォーム（お問い合わせ） ---------- */
.yrn-form { display: grid; gap: 18px; max-width: 34rem; }
.yrn-form label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.yrn-form input, .yrn-form textarea {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--yrn-line);
  border-radius: 3px;
  background: var(--yrn-paper);
  font-family: inherit;
  font-size: 16px;
  color: var(--yrn-ink);
}
.yrn-form textarea { min-height: 160px; resize: vertical; }
.yrn-form__hint { margin: 6px 0 0; font-size: 12.5px; color: var(--yrn-ink-sub); }

/* ---------- 15. 注意書き（未確定・下書き） ---------- */
.yrn-todo {
  margin: 24px 0;
  padding: 14px 18px;
  background: #FBF3E8;
  border: 1px solid #E8D4B8;
  border-radius: var(--yrn-radius);
  font-size: 13.5px;
  line-height: 1.85;
  color: #6B5132;
}
.yrn-todo b { color: #523D24; }