/*
Theme Name: amanojak
Theme URI: https://www.amanojak.com/ai/
Author: amanojak
Description: amanojak.com AI LAB 専用オリジナルテーマ。React TOPと同一の世界観(赤×黒×黄・動画背景・軽量)。ブログ/実験記録/作品ショーケース全対応。
Version: 0.1.0
Requires at least: 6.9
Tested up to: 7.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: amanojak
*/

/* ===== design tokens (React TOP styles.css と同一) ===== */
:root {
  --bg: #060608;
  --bg2: #0b0b10;
  --ink: #ececf1;
  --muted: #8b8b97;
  --crimson: #ff3355;
  --crimson-dim: #b3203b;
  --gold: #e8c37a;
  --yellow: #ffd23f;
  --radius: 18px;
  --panel: rgba(10, 10, 15, 0.74);
  --panel-line: rgba(255, 255, 255, 0.08);
}

/* ===== base ===== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
::selection { background: var(--crimson); color: #0a0a0c; }

/* 動画背景が無い時の保険(ノイズ+赤グロー) */
.site-fallback-bg {
  position: fixed; inset: 0; z-index: -1;
  background:
    radial-gradient(900px 500px at 85% -5%, rgba(255, 51, 85, 0.16), transparent 60%),
    radial-gradient(700px 420px at 8% 100%, rgba(255, 210, 63, 0.05), transparent 60%),
    linear-gradient(180deg, #060608, #08070b 60%, #050507);
}
.site-fallback-bg::after {
  content: ""; position: absolute; inset: 0; opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* コンテンツは動画背景(.ko-bg z-index:0)より上 */
.site { position: relative; z-index: 2; }

/* ===== topbar ===== */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: flex-end;
  padding: 14px clamp(16px, 4vw, 48px);
  background: linear-gradient(180deg, rgba(6, 6, 8, 0.78), transparent);
}

.menu-btn {
  display: flex; align-items: center; gap: 12px; background: transparent; border: 0;
  cursor: pointer; color: var(--ink); padding: 10px 6px; position: relative; z-index: 120;
}
.menu-btn .mb-lines { position: relative; width: 28px; height: 14px; }
.menu-btn .mb-line { position: absolute; left: 0; width: 28px; height: 2px; background: var(--ink); transition: transform 0.3s, opacity 0.3s; }
.menu-btn .mb-line:nth-child(1) { top: 0; }
.menu-btn .mb-line:nth-child(2) { top: 6px; }
.menu-btn .mb-line:nth-child(3) { top: 12px; }
.menu-btn .mb-text { font-size: 12px; letter-spacing: 0.22em; color: var(--muted); }
body.menu-open .menu-btn .mb-line:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu-open .menu-btn .mb-line:nth-child(2) { opacity: 0; }
body.menu-open .menu-btn .mb-line:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ===== fullscreen menu (TOPと同型) ===== */
.menu-overlay {
  position: fixed; inset: 0; z-index: 110; display: none; flex-direction: column; justify-content: center;
  padding: clamp(40px, 9vw, 120px);
  background: radial-gradient(800px 500px at 80% 8%, rgba(255, 51, 85, 0.2), transparent 60%), rgba(5, 5, 7, 0.95);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
}
body.menu-open .menu-overlay { display: flex; }
body.menu-open { overflow: hidden; }
.menu-inner { display: flex; flex-direction: column; gap: 4px; max-height: 76vh; overflow-y: auto; }
.menu-item {
  display: flex; align-items: baseline; gap: 18px; padding: 10px 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.5s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1);
}
body.menu-open .menu-item { opacity: 1; transform: none; }
body.menu-open .menu-item:nth-child(2) { transition-delay: 0.05s; }
body.menu-open .menu-item:nth-child(3) { transition-delay: 0.1s; }
body.menu-open .menu-item:nth-child(4) { transition-delay: 0.15s; }
body.menu-open .menu-item:nth-child(5) { transition-delay: 0.2s; }
body.menu-open .menu-item:nth-child(6) { transition-delay: 0.25s; }
.menu-item .m-no { font-size: 12px; color: var(--crimson); letter-spacing: 0.2em; width: 30px; flex: none; }
.menu-item .m-label { font-size: clamp(26px, 4.6vw, 44px); font-weight: 800; letter-spacing: 0.04em; transition: color 0.2s; }
.menu-item .m-jp { font-size: 12px; color: var(--muted); }
.menu-item:hover .m-label { color: var(--yellow); text-shadow: 0 0 30px rgba(255, 210, 63, 0.4); }
.menu-foot { margin-top: 34px; font-size: 11px; letter-spacing: 0.3em; color: var(--muted); }

/* ===== layout ===== */
.container { width: min(1140px, calc(100% - clamp(32px, 8vw, 120px))); margin: 0 auto; }
.container-narrow { width: min(1320px, calc(100% - clamp(32px, 8vw, 96px))); margin: 0 auto; }

/* ===== hero (home) ===== */
.hero-lab {
  min-height: 56vh; display: flex; flex-direction: column; justify-content: flex-end;
  padding: 130px 0 46px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 12px; letter-spacing: 0.32em; color: var(--gold); text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--gold); display: inline-block; }
.hero-lab h1 {
  margin: 14px 0 0; font-size: clamp(46px, 9vw, 104px); font-weight: 800; line-height: 1.02; letter-spacing: 0.01em;
  text-shadow: 0 8px 44px rgba(0, 0, 0, 0.55);
}
.hero-lab h1 .accent { color: transparent; -webkit-text-stroke: 1.5px var(--crimson); }
.hero-lab .lead { margin-top: 18px; font-size: clamp(14px, 1.6vw, 18px); color: var(--muted); max-width: 560px; line-height: 1.8; }
.hero-lab .hero-tags { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18); font-size: 11px; letter-spacing: 0.16em; color: var(--ink);
  background: rgba(6, 6, 8, 0.5); backdrop-filter: blur(6px); transition: border-color 0.2s, color 0.2s;
}
a.chip:hover { border-color: var(--crimson); color: var(--yellow); }
.chip.is-active { border-color: var(--crimson); color: var(--yellow); }

/* ===== section head ===== */
.sec-head { display: flex; align-items: baseline; gap: 18px; margin: 0 0 22px; }
.sec-head .no { font-size: 13px; color: var(--crimson); letter-spacing: 0.3em; }
.sec-head h2 { margin: 0; font-size: clamp(22px, 3.2vw, 34px); font-weight: 800; letter-spacing: 0.02em; }
.sec-head .more { margin-left: auto; font-size: 12px; letter-spacing: 0.2em; color: var(--muted); }
.sec-head .more:hover { color: var(--yellow); }

/* ===== post cards ===== */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pcard {
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  background: linear-gradient(160deg, #131319, #0c0c11);
  border: 1px solid rgba(255, 255, 255, 0.07); border-radius: var(--radius);
  transition: transform 0.18s, border-color 0.25s;
}
.pcard:hover { transform: translateY(-6px); border-color: rgba(255, 51, 85, 0.5); }
.pcard .thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #0a0a0e; }
.pcard .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.35s; }
.pcard:hover .thumb img { transform: scale(1.05); }
.pcard .thumb .noimg {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-size: 44px; font-weight: 800; color: rgba(255, 51, 85, 0.55);
  background: radial-gradient(360px 200px at 50% 0%, rgba(255, 51, 85, 0.18), transparent 70%);
}
.pcard .body { display: flex; flex-direction: column; gap: 8px; padding: 16px 18px 18px; flex: 1; }
.pcard .tag { font-size: 11px; letter-spacing: 0.28em; color: var(--gold); text-transform: uppercase; }
.pcard h3 { margin: 0; font-size: 16px; font-weight: 700; line-height: 1.5; }
.pcard p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.pcard .meta-row { margin-top: auto; padding-top: 10px; display: flex; align-items: center; gap: 12px; font-size: 11px; color: var(--muted); letter-spacing: 0.08em; }
.pcard .meta-row .date { color: var(--crimson); }
.pcard a.cover { position: absolute; inset: 0; z-index: 1; }

/* ===== panel(記事本文などの暗幕パネル) ===== */
.panel {
  background: var(--panel); border: 1px solid var(--panel-line); border-radius: var(--radius);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}

/* ===== single / page ===== */
.article-head { padding: 120px 0 18px; }
.article-head .cat-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.article-head h1.entry-title { margin: 0; font-size: clamp(26px, 4.4vw, 44px); font-weight: 800; line-height: 1.3; text-shadow: 0 6px 36px rgba(0, 0, 0, 0.6); }
.article-head .amk-meta { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 16px; font-size: 12px; color: var(--muted); letter-spacing: 0.06em; }
.article-head .amk-meta .mi { display: inline-flex; align-items: center; gap: 6px; }
.article-head .amk-meta .mi b { color: var(--gold); font-weight: 600; }

.article-body { padding: 28px clamp(18px, 4vw, 48px) 36px; margin-bottom: 30px; }
.entry { font-size: 17px; line-height: 2.05; }
.entry > * { margin-top: 1.4em; margin-bottom: 0; }
.entry > *:first-child { margin-top: 0; }
.entry h2 {
  font-size: clamp(20px, 2.6vw, 26px); font-weight: 800; line-height: 1.4; letter-spacing: 0.02em;
  margin-top: 2.2em; padding: 0.4em 0 0.4em 0.8em; border-left: 4px solid var(--crimson);
  background: linear-gradient(90deg, rgba(255, 51, 85, 0.1), transparent 70%);
  border-radius: 4px;
}
.entry h3 {
  font-size: clamp(17px, 2vw, 20px); font-weight: 700; margin-top: 1.9em;
  padding-bottom: 0.35em; border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.entry h3::before { content: "■ "; color: var(--gold); font-size: 0.8em; }
.entry h4 { font-size: 16px; font-weight: 700; color: var(--yellow); }
.entry a { color: var(--yellow); border-bottom: 1px dashed rgba(255, 210, 63, 0.5); transition: color 0.2s, border-color 0.2s; overflow-wrap: anywhere; }
.entry a:hover { color: var(--crimson); border-color: var(--crimson); }
.entry strong { color: var(--yellow); font-weight: 700; }
.entry img { border-radius: 12px; }
.entry figure { margin-left: 0; margin-right: 0; }
.entry figcaption { font-size: 12px; color: var(--muted); text-align: center; margin-top: 8px; }
.entry blockquote {
  margin-left: 0; margin-right: 0; padding: 16px 22px; border-left: 3px solid var(--crimson);
  background: rgba(255, 51, 85, 0.06); border-radius: 0 12px 12px 0; color: #d6d6de;
}
.entry blockquote cite { display: block; margin-top: 8px; font-size: 12px; color: var(--muted); font-style: normal; }
.entry ul, .entry ol { padding-left: 1.5em; }
.entry li { margin: 0.4em 0; }
.entry li::marker { color: var(--crimson); }
.entry hr { border: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent); margin: 2.5em 0; }
.entry table { width: 100%; border-collapse: collapse; font-size: 14px; display: block; overflow-x: auto; }
.entry th, .entry td { padding: 10px 14px; border: 1px solid rgba(255, 255, 255, 0.12); text-align: left; }
.entry th { background: rgba(255, 51, 85, 0.12); color: var(--ink); font-weight: 700; white-space: nowrap; }
.entry tr:nth-child(even) td { background: rgba(255, 255, 255, 0.025); }

/* インラインコード / コードブロック */
.entry code {
  font-family: "Cascadia Code", Consolas, Menlo, monospace; font-size: 0.88em;
  background: rgba(255, 210, 63, 0.1); color: var(--yellow); padding: 0.15em 0.45em; border-radius: 6px;
}
.entry pre {
  position: relative; background: #0a0a10; border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 12px;
  padding: 18px 20px; overflow-x: auto; line-height: 1.7;
}
.entry pre code { background: transparent; color: #d8d8e2; padding: 0; font-size: 13px; display: block; }
.entry pre .code-copy {
  position: absolute; top: 8px; right: 8px; border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(6, 6, 8, 0.7);
  color: var(--muted); font-size: 10px; letter-spacing: 0.14em; padding: 4px 10px; border-radius: 999px; cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}
.entry pre .code-copy:hover { color: var(--yellow); border-color: var(--crimson); }

/* ===== KO化したCocoon系装飾: ボックス ===== */
.box-point, .box-info, .box-warn, .box-memo {
  padding: 16px 20px 16px 52px; border-radius: 12px; position: relative; font-size: 14.5px;
}
.box-point::before, .box-info::before, .box-warn::before, .box-memo::before {
  position: absolute; left: 18px; top: 14px; font-size: 18px;
}
.box-point { background: rgba(255, 51, 85, 0.08); border: 1px solid rgba(255, 51, 85, 0.4); }
.box-point::before { content: "🔥"; }
.box-info { background: rgba(90, 160, 255, 0.08); border: 1px solid rgba(90, 160, 255, 0.4); }
.box-info::before { content: "💡"; }
.box-warn { background: rgba(255, 210, 63, 0.07); border: 1px solid rgba(255, 210, 63, 0.45); }
.box-warn::before { content: "⚠️"; }
.box-memo { background: rgba(255, 255, 255, 0.04); border: 1px dashed rgba(255, 255, 255, 0.25); }
.box-memo::before { content: "📝"; }

/* ===== KO化したCocoon系装飾: 吹き出し ===== */
.bubble { display: flex; gap: 14px; align-items: flex-start; }
.bubble .b-icon {
  width: 56px; height: 56px; border-radius: 50%; flex: none; overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.2); background: #15151c;
  display: flex; align-items: center; justify-content: center; font-size: 26px;
}
.bubble .b-icon img { width: 100%; height: 100%; object-fit: cover; }
.bubble .b-name { font-size: 10px; color: var(--muted); text-align: center; margin-top: 4px; letter-spacing: 0.06em; }
.bubble .b-body {
  position: relative; background: #15151c; border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 12px 18px; border-radius: 14px; font-size: 14.5px; max-width: calc(100% - 90px);
}
.bubble .b-body::before {
  content: ""; position: absolute; top: 20px; left: -7px; width: 12px; height: 12px;
  background: #15151c; border-left: 1px solid rgba(255, 255, 255, 0.12); border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  transform: rotate(45deg);
}
.bubble.bubble-right { flex-direction: row-reverse; }
.bubble.bubble-right .b-body::before { left: auto; right: -7px; transform: rotate(225deg); }
.bubble.bubble-right .b-body { background: rgba(255, 51, 85, 0.1); border-color: rgba(255, 51, 85, 0.35); }
.bubble.bubble-right .b-body::before { background: #1d1218; border-color: rgba(255, 51, 85, 0.35); }

/* ===== 埋込(YouTube / X / note) ===== */
.note-embed-wrap { display: flex; justify-content: center; }
.note-embed-wrap .note-embed { border-radius: 12px; overflow: hidden; }

.entry .wp-block-embed { text-align: center; }
.entry .wp-block-embed__wrapper iframe { max-width: 100%; border-radius: 12px; }
.entry .twitter-tweet { margin-left: auto !important; margin-right: auto !important; }
.entry .wp-block-embed figcaption { font-size: 12px; color: var(--muted); margin-top: 8px; }

/* 記事ヘッダーのアイキャッチ */
.article-hero { margin: 22px 0 0; border-radius: var(--radius); overflow: hidden; border: 1px solid rgba(255, 255, 255, 0.1); }
.article-hero img { width: 100%; height: auto; display: block; }

/* ===== 目次(TOC) ===== */
.amk-toc {
  margin-top: 1.6em; border: 1px solid rgba(255, 210, 63, 0.3); border-radius: 12px;
  background: rgba(255, 210, 63, 0.04); overflow: hidden;
}
.amk-toc summary {
  cursor: pointer; padding: 12px 18px; font-size: 13px; font-weight: 700; letter-spacing: 0.24em;
  color: var(--gold); list-style: none; display: flex; align-items: center; gap: 10px;
}
.amk-toc summary::-webkit-details-marker { display: none; }
.amk-toc summary::before { content: "▸"; transition: transform 0.2s; color: var(--crimson); }
.amk-toc[open] summary::before { transform: rotate(90deg); }
.amk-toc ol { margin: 0; padding: 4px 20px 16px 38px; font-size: 13.5px; }
.amk-toc ol ol { padding: 0 0 0 1.2em; }
.amk-toc li { margin: 0.45em 0; }
.amk-toc a { color: var(--ink); border: 0; }
.amk-toc a:hover { color: var(--yellow); }

/* ===== シェア / 前後 / 関連 ===== */
.share-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 26px 0 0; }
.share-row .sh-label { font-size: 11px; letter-spacing: 0.3em; color: var(--muted); margin-right: 4px; }
.share-row a, .share-row button {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 18px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(6, 6, 8, 0.5); color: var(--ink);
  font-size: 12px; letter-spacing: 0.1em; cursor: pointer; transition: border-color 0.2s, color 0.2s, transform 0.15s;
  font-family: inherit;
}
.share-row a:hover, .share-row button:hover { border-color: var(--crimson); color: var(--yellow); transform: translateY(-2px); }

.pn-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 34px 0; }
.pn-nav a {
  display: flex; flex-direction: column; gap: 6px; padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 14px; background: rgba(10, 10, 15, 0.6);
  transition: border-color 0.2s, transform 0.15s;
}
.pn-nav a:hover { border-color: rgba(255, 51, 85, 0.5); transform: translateY(-3px); }
.pn-nav .pn-dir { font-size: 10px; letter-spacing: 0.3em; color: var(--crimson); }
.pn-nav .pn-title { font-size: 13px; line-height: 1.5; }
.pn-nav .pn-next { text-align: right; align-items: flex-end; }

.related { margin: 40px 0 60px; }

/* ===== breadcrumbs ===== */
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 11px; letter-spacing: 0.08em; color: var(--muted); }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--yellow); }
.crumbs .sep { color: var(--crimson); }

/* ===== archive / pagination ===== */
.archive-head { padding: 130px 0 30px; }
.archive-head h1 { margin: 8px 0 0; font-size: clamp(30px, 5vw, 54px); font-weight: 800; }
.archive-head .desc { color: var(--muted); font-size: 14px; max-width: 560px; margin-top: 10px; }
.pagination { display: flex; gap: 8px; justify-content: center; margin: 40px 0 70px; }
.pagination .page-numbers {
  display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.15); border-radius: 10px; font-size: 13px; color: var(--ink);
  transition: border-color 0.2s, color 0.2s;
}
.pagination .page-numbers:hover { border-color: var(--crimson); color: var(--yellow); }
.pagination .page-numbers.current { background: var(--crimson); border-color: var(--crimson); color: #0a0a0c; font-weight: 700; }
.pagination .dots { border: 0; }

/* ===== 検索 ===== */
.search-form { display: flex; gap: 10px; max-width: 520px; }
.search-form input[type="search"] {
  flex: 1; background: rgba(10, 10, 15, 0.7); border: 1px solid rgba(255, 255, 255, 0.18); border-radius: 999px;
  color: var(--ink); padding: 11px 20px; font-size: 14px; font-family: inherit; outline: none;
}
.search-form input[type="search"]:focus { border-color: var(--crimson); }
.search-form button {
  border: 1px solid var(--crimson); background: var(--crimson); color: #0a0a0c; font-weight: 700;
  border-radius: 999px; padding: 0 22px; cursor: pointer; font-family: inherit; font-size: 13px;
  transition: transform 0.15s, box-shadow 0.2s;
}
.search-form button:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255, 51, 85, 0.35); }

/* ===== footer ===== */
.site-footer { margin-top: 40px; padding: 30px clamp(20px, 6vw, 90px) 26px; border-top: 1px solid rgba(255, 255, 255, 0.07); text-align: center; }
.foot { color: var(--muted); font-size: 12px; letter-spacing: 0.06em; }
.foot .ft-tag { color: var(--gold); }
.foot-links { display: flex; flex-wrap: wrap; gap: 18px; justify-content: center; margin-bottom: 14px; font-size: 11px; letter-spacing: 0.2em; color: var(--muted); }
.foot-links a:hover { color: var(--yellow); }

/* sub_bg.v6 の WATCH/SOUND ピルをトップバー(MENU)と重ならない位置へ */
.ko-watch { top: 84px !important; }
.ko-sound { top: 134px !important; }
@media (max-width: 720px) {
  .ko-watch { top: 76px !important; }
  .ko-sound { top: 122px !important; }
}
/* メニュー展開中はピルを隠す(ピルはbody直下z60でオーバーレイより上に乗るため) */
body.menu-open .ko-watch, body.menu-open .ko-sound { display: none !important; }
.menu-inner { scrollbar-width: thin; scrollbar-color: rgba(255, 51, 85, 0.45) transparent; }
.menu-inner::-webkit-scrollbar { width: 5px; }
.menu-inner::-webkit-scrollbar-thumb { background: rgba(255, 51, 85, 0.45); border-radius: 99px; }
.menu-inner::-webkit-scrollbar-track { background: transparent; }

/* ===== 404 ===== */
.nf-wrap { min-height: 64vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 120px 20px 60px; }
.nf-wrap .nf-code { font-size: clamp(80px, 16vw, 160px); font-weight: 800; line-height: 1; color: transparent; -webkit-text-stroke: 2px var(--crimson); }
.nf-wrap p { color: var(--muted); }

/* ===== screen-reader ===== */
.screen-reader-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ===== responsive ===== */
@media (max-width: 1024px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  body { font-size: 14.5px; }
  .hero-lab { min-height: 46vh; padding-top: 104px; }
  .article-head { padding-top: 100px; }
  .archive-head { padding-top: 104px; }
  .post-grid { grid-template-columns: 1fr; gap: 14px; }
  .article-body { padding: 20px 16px 26px; }
  .entry { font-size: 14.5px; line-height: 1.95; }
  .pn-nav { grid-template-columns: 1fr; }
  .bubble .b-icon { width: 44px; height: 44px; font-size: 20px; }
  .bubble .b-body { max-width: calc(100% - 70px); }
}
@media (max-width: 480px) {
  .brand .bname .b1 { font-size: 11px; letter-spacing: 0.22em; }
  .menu-btn .mb-text { display: none; }
}

/* 動きを抑えたい訪問者(OS設定)への配慮=自動で無効化 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .menu-item { transition: none; }
}