/*
Theme Name: Robotics Trend New
Theme URI: https://example.com/
Author: Robotics Trend
Description: ロボティクス・AI専門メディア「AIロボットニュース」のリニューアル版テーマ（新規インストール用・既存テーマは上書きしません）。
Version: 1.0
Requires PHP: 7.4
Text Domain: robotics-trend-new
*/

:root{
  --bg-navy:#0a1628;
  --bg-navy-2:#0d1e35;
  --panel:#101f38;
  --panel-2:#0c1930;
  --border:rgba(255,255,255,.08);
  --text:#eef2f8;
  --text-dim:#9fb0c8;
  --blue:#2f7bf6;
  --blue-2:#1a5fd6;
  --cyan:#38d0ff;
  --tag-blue:#1e63c9;
  --tag-red:#c9432f;
  --green:#5fd88a;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-navy);
  color:var(--text);
  font-family:"Noto Sans JP","Hiragino Sans","Yu Gothic",sans-serif;
  line-height:1.6;
}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--cyan);}
img{max-width:100%;display:block;}
ul{list-style:none;margin:0;padding:0;}
.container{max-width:1200px;margin:0 auto;padding:0 24px;}

/* placeholder image blocks */
.ph-image{
  position:relative;
  background:repeating-linear-gradient(135deg,#12233f,#12233f 10px,#0d1c33 10px,#0d1c33 20px);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-dim);
  font-family:"SFMono-Regular",Consolas,monospace;
  font-size:12px;
  text-align:center;
  overflow:hidden;
}

/* header */
.site-header{
  background:rgba(10,22,40,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  position:fixed;top:0;left:0;right:0;z-index:100;
}
body{padding-top:76px;}
body.admin-bar .site-header{top:32px;}
@media(max-width:782px){
  body.admin-bar .site-header{top:46px;}
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:76px;gap:20px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;min-width:0;max-width:360px;}
.brand-mark{
  width:44px;height:44px;border-radius:10px;
  background:linear-gradient(135deg,var(--blue),var(--blue-2));
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:20px;color:#fff;flex-shrink:0;
  overflow:hidden;
}
.brand-mark img{width:100%;height:100%;object-fit:cover;border-radius:10px;}
.brand-text{display:flex;flex-direction:column;gap:2px;line-height:1.3;min-width:0;}
.brand-text .name{
  font-size:17px;font-weight:700;letter-spacing:.01em;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;
}
.brand-text .tagline{
  font-size:9.5px;color:var(--text-dim);
  white-space:normal;overflow-wrap:break-word;line-height:1.4;
}

.header-right{display:flex;align-items:center;gap:16px;flex-shrink:1;min-width:0;}

.main-nav{min-width:0;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.main-nav::-webkit-scrollbar{display:none;}
.main-nav ul{display:flex;align-items:center;gap:4px;flex-wrap:nowrap;white-space:nowrap;}
.main-nav li{flex-shrink:0;}
.main-nav a{
  position:relative;display:inline-block;white-space:nowrap;
  font-size:14px;font-weight:500;letter-spacing:.01em;color:var(--text-dim);
  padding:10px 12px;border-radius:8px;
  transition:color .15s,background-color .15s;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--cyan);border-radius:2px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.04);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.current{color:#fff;}
.main-nav a.current::after{transform:scaleX(1);background:var(--blue);}

.search-page-form{margin-bottom:24px;max-width:420px;}
.search-page-form .rt-search-form{max-width:420px;}
.rt-search-form{display:flex;gap:8px;}
.rt-search-input{
  flex:1;min-width:0;padding:10px 12px;border-radius:8px;border:1px solid var(--border);
  background:var(--panel-2);color:#fff;font-size:13.5px;font-family:inherit;
}
.rt-search-input::placeholder{color:var(--text-dim);}
.rt-search-submit{
  width:38px;flex-shrink:0;border-radius:8px;border:none;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.rt-search-submit:hover{background:var(--blue-2);}

.menu-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:38px;height:38px;border:1px solid var(--border);border-radius:8px;background:var(--panel);cursor:pointer;
}
.menu-toggle span{display:block;width:18px;height:2px;background:#fff;margin:0 auto;transition:transform .2s,opacity .2s;}
.menu-toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.menu-toggle.is-active span:nth-child(2){opacity:0;}
.menu-toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-nav-overlay{
  position:fixed;inset:0;background:rgba(4,10,20,.6);z-index:150;
  opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;
}
.mobile-nav{
  position:fixed;top:0;right:0;bottom:0;width:280px;max-width:82vw;
  background:var(--bg-navy-2);border-left:1px solid var(--border);z-index:160;
  padding:90px 26px 26px;transform:translateX(100%);transition:transform .25s ease;
  overflow-y:auto;
}
.mobile-nav ul{display:flex;flex-direction:column;gap:4px;}
.mobile-nav a{display:block;padding:13px 4px;font-size:15.5px;color:var(--text-dim);border-bottom:1px solid var(--border);}
.mobile-nav a:hover,.mobile-nav a.current{color:#fff;}
body.nav-open .mobile-nav-overlay{opacity:1;visibility:visible;}
body.nav-open .mobile-nav{transform:translateX(0);}
body.nav-open{overflow:hidden;}

/* hero */
.hero{
  padding:0 0 44px;
  background-size:cover;background-position:center;
  position:relative;
}
.hero-grid{
  display:grid;grid-template-columns:1.5fr 1fr;gap:36px;align-items:center;
  padding:60px 0;min-height:460px;
}
.hero-copy h1{font-size:36px;line-height:1.35;margin:0 0 18px;font-weight:800;color:#fff;}
.hero-copy p{color:#d5dfec;font-size:14.5px;margin:0 0 26px;}
.hero-actions{display:flex;gap:14px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 24px;border-radius:8px;font-size:14.5px;font-weight:700;
  border:1px solid transparent;cursor:pointer;
}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:var(--blue-2);color:#fff;}
.btn-outline{background:transparent;border-color:rgba(255,255,255,.35);color:#fff;}
.btn-outline:hover{border-color:#fff;color:#fff;}

.market-card{
  background:rgba(16,31,56,.85);backdrop-filter:blur(6px);
  border:1px solid var(--border);border-radius:14px;
  padding:22px;display:flex;flex-direction:column;gap:18px;
}
.market-card-head{display:flex;justify-content:space-between;align-items:baseline;}
.market-card-head h3{font-size:15px;margin:0;}
.market-card-head span{font-size:11px;color:var(--text-dim);}
.market-figure .label{font-size:12px;color:var(--text-dim);}
.market-figure .value{font-size:34px;font-weight:800;margin:4px 0;}
.market-figure .value small{font-size:16px;font-weight:600;margin-left:4px;}
.market-figure .delta{color:#5fd88a;font-size:13px;font-weight:600;}
.market-chart{height:90px;border-radius:8px;background:linear-gradient(180deg,rgba(56,208,255,.12),transparent);position:relative;}
.market-chart .line{position:absolute;inset:0;}
.market-topics{border-top:1px solid var(--border);padding-top:16px;}
.market-topics h4{font-size:12.5px;color:var(--text-dim);margin:0 0 10px;font-weight:600;}
.market-topics li{display:flex;gap:10px;font-size:13px;margin-bottom:9px;color:#dfe7f2;}
.market-topics li span{
  flex-shrink:0;width:18px;height:18px;border-radius:50%;background:var(--blue);
  color:#fff;font-size:11px;display:flex;align-items:center;justify-content:center;font-weight:700;
}

/* categories */
.categories{padding:30px 0;}
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.cat-card{
  background:var(--panel);border:1px solid var(--border);border-radius:12px;
  padding:22px 18px;display:flex;flex-direction:column;align-items:center;gap:12px;
  text-align:center;transition:border-color .15s,transform .15s;
}
.cat-card:hover{border-color:var(--blue);transform:translateY(-2px);color:#fff;}
.cat-icon{width:46px;height:46px;border-radius:10px;background:var(--panel-2);display:flex;align-items:center;justify-content:center;color:var(--cyan);overflow:hidden;}
.cat-icon img{width:100%;height:100%;object-fit:cover;}
.cat-card .cat-name{font-size:14.5px;font-weight:600;display:flex;align-items:center;gap:6px;}

/* section heading */
.section{padding:34px 0;}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.section-head h2{
  font-size:19px;margin:0;padding-left:12px;border-left:4px solid var(--blue);
}
.section-more{font-size:13.5px;color:var(--text-dim);display:flex;align-items:center;gap:6px;}
.section-more:hover{color:#fff;}

/* topics grid */
.topics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;overflow:hidden;}
.card .ph-image{height:150px;}
.card-body{padding:16px;}
.tag{
  display:inline-block;font-size:11px;padding:3px 9px;border-radius:4px;
  background:var(--tag-blue);color:#fff;margin-bottom:10px;font-weight:600;
}
.tag.tag-red{background:var(--tag-red);}
.card-body h3{font-size:14.5px;margin:0 0 12px;font-weight:700;line-height:1.5;}
.card-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text-dim);}

/* news list */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.news-item{
  display:flex;gap:14px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:12px;
}
.news-item .ph-image{width:96px;height:80px;border-radius:6px;flex-shrink:0;}
.news-item-body{display:flex;flex-direction:column;gap:6px;min-width:0;}
.news-item-meta{display:flex;gap:8px;font-size:11.5px;color:var(--text-dim);}
.news-item-meta .cat{color:var(--cyan);}
.news-item-body h4{font-size:13.5px;margin:0;font-weight:700;line-height:1.5;}

/* footer */
.site-footer{background:var(--bg-navy);border-top:1px solid var(--border);padding:44px 0 20px;margin-top:20px;}
.footer-grid{display:grid;grid-template-columns:1.8fr repeat(2,1fr);gap:24px;margin-bottom:30px;}
.footer-brand p{color:var(--text-dim);font-size:12.5px;margin:14px 0 4px;max-width:340px;}
.footer-col h6{font-size:13px;margin:0 0 14px;color:var(--text-dim);font-weight:600;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{font-size:13px;color:#dbe3ee;}
.footer-col-2col ul{display:grid;grid-template-columns:1fr 1fr;column-gap:16px;}
.footer-bottom{border-top:1px solid var(--border);padding-top:18px;font-size:12px;color:var(--text-dim);text-align:center;}

/* フッターのアコーディオン（カテゴリ／サイト情報）：モバイルのみ開閉式、PCは常時展開 */
.footer-accordion{border-bottom:1px solid var(--border);padding-bottom:14px;}
.footer-accordion summary{
  font-size:13px;margin:0;color:var(--text-dim);font-weight:600;
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  padding:2px 0 14px;user-select:none;
}
.footer-accordion summary::-webkit-details-marker{display:none;}
.footer-accordion summary::after{
  content:"";width:9px;height:9px;flex-shrink:0;margin-left:10px;
  border-right:1.6px solid var(--text-dim);border-bottom:1.6px solid var(--text-dim);
  transform:rotate(45deg);transition:transform .2s ease;
}
.footer-accordion[open] summary::after{transform:rotate(-135deg);}
.footer-accordion summary:hover{color:#fff;}
.footer-accordion summary:hover::after{border-color:#fff;}
.footer-accordion ul{padding-top:2px;}
/* PC：開閉システムを無効化し、常に内容を表示（実際の表示制御はopen属性をJSで設定して行う） */
@media(min-width:761px){
  .footer-accordion summary{cursor:default;pointer-events:none;padding-bottom:14px;}
  .footer-accordion summary::after{display:none;}
}

/* card image */
.card-img{height:150px;width:100%;object-fit:cover;}

/* breadcrumb */
.breadcrumb{padding:18px 0 0;}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.breadcrumb li{font-size:12.5px;color:var(--text-dim);display:flex;align-items:center;gap:6px;}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--text-dim);}
.breadcrumb a{color:var(--text-dim);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb li[aria-current="page"]{color:#dbe3ee;}

/* 2カラムレイアウト（記事・アーカイブ・検索） */
.layout-with-sidebar{display:grid;grid-template-columns:1fr 300px;gap:34px;align-items:start;}
.layout-main{min-width:0;}

/* サイドバー */
.rt-sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;}
.widget-box{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px;}
.widget-title{font-size:14.5px;margin:0 0 16px;padding-left:10px;border-left:3px solid var(--blue);}
.widget-empty{font-size:13px;color:var(--text-dim);}
.popular-list{display:flex;flex-direction:column;gap:14px;}
.popular-item{display:flex;gap:12px;align-items:flex-start;}
.popular-rank{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--panel-2);
  color:var(--cyan);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.popular-body{min-width:0;display:flex;flex-direction:column;gap:4px;}
.popular-title{font-size:13px;font-weight:600;line-height:1.5;color:#e9eef6;}
.popular-item:hover .popular-title{color:var(--cyan);}
.popular-meta{font-size:11px;color:var(--text-dim);}
.cat-list li{border-bottom:1px solid var(--border);}
.cat-list li:last-child{border-bottom:none;}
.cat-list a{display:flex;align-items:center;gap:10px;padding:10px 2px;font-size:13.5px;color:#dbe3ee;}
.cat-list a:hover{color:var(--cyan);}
.cat-icon-sm{color:var(--cyan);flex-shrink:0;display:flex;width:16px;height:16px;border-radius:4px;overflow:hidden;}
.cat-icon-sm img{width:100%;height:100%;object-fit:cover;}
.cat-count{margin-left:auto;font-size:11.5px;color:var(--text-dim);}
.widget-cta p{font-size:12.5px;color:var(--text-dim);margin:0 0 14px;}
.btn-block{width:100%;justify-content:center;}

/* 記事詳細 */
.article-section{padding-top:14px;}
.single-article{max-width:820px;}
.article-header .tag{margin-bottom:14px;}
.article-title{font-size:28px;line-height:1.5;margin:0 0 12px;font-weight:800;}
.article-meta{margin-bottom:22px;}
.article-thumb{border-radius:12px;overflow:hidden;margin-bottom:26px;}
.article-thumb-ph{height:340px;border-radius:12px;margin-bottom:26px;}
.article-body{font-size:15.5px;color:#dbe3ee;line-height:1.9;}
.article-body p{margin:0 0 20px;}
.article-body h2{font-size:21px;margin:34px 0 14px;padding-left:10px;border-left:4px solid var(--blue);}
.article-body h3{font-size:17px;margin:26px 0 12px;color:#fff;}
.article-body img{border-radius:10px;margin:16px 0;}
.article-body a{color:var(--cyan);text-decoration:underline;text-underline-offset:3px;}
.article-body blockquote{
  margin:20px 0;padding:14px 20px;border-left:3px solid var(--blue);background:var(--panel);
  border-radius:0 8px 8px 0;color:var(--text-dim);font-size:14.5px;
}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:22px;}

/* 関連動画（プラグインが記事本文末尾に挿入するYouTube埋め込み） */
.yt-wrap{margin:32px 0;}
.yt-label{
  font-size:12.5px;color:var(--text-dim);font-weight:600;
  margin-bottom:10px;padding-left:10px;border-left:3px solid var(--blue);
}
.yt-wrap iframe{
  display:block;width:100%;aspect-ratio:16/9;height:auto;
  border-radius:10px;border:1px solid var(--border);
}
.article-body li{margin-bottom:8px;}

.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0 20px;}
.tag-pill{
  font-size:12.5px;padding:6px 12px;border-radius:20px;background:var(--panel-2);
  border:1px solid var(--border);color:var(--text-dim);
}
.tag-pill:hover{color:var(--cyan);border-color:var(--blue);}

.article-share{display:flex;align-items:center;gap:10px;padding-top:20px;border-top:1px solid var(--border);}
.article-share-label{font-size:12.5px;color:var(--text-dim);margin-right:6px;}
.share-btn{
  width:34px;height:34px;border-radius:50%;background:var(--panel);border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--text-dim);flex-shrink:0;
}
.share-btn:hover{color:#fff;border-color:var(--blue);}

.related-articles{margin-top:44px;padding-top:36px;border-top:1px solid var(--border);max-width:820px;}

/* アーカイブ／検索結果バナー */
.archive-banner{padding:26px 0 34px;}
.archive-banner-inner{display:flex;align-items:center;gap:18px;}
.archive-banner-icon{
  width:54px;height:54px;border-radius:12px;flex-shrink:0;overflow:hidden;
  background:var(--panel);border:1px solid var(--border);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;
}
.archive-banner-icon img{width:100%;height:100%;object-fit:cover;}
.archive-banner-text h1{font-size:24px;font-weight:800;margin:0 0 6px;}
.archive-desc{font-size:13.5px;color:var(--text-dim);margin:0 0 6px;}
.archive-count{font-size:12px;color:var(--text-dim);}

/* 記事詳細：カテゴリバッジ */
.article-cat-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;
  color:var(--cyan);background:var(--panel);border:1px solid var(--border);
  border-radius:20px;padding:6px 14px 6px 8px;margin-bottom:14px;
}
.article-cat-badge:hover{border-color:var(--blue);color:#fff;}
.article-cat-badge-icon{width:20px;height:20px;border-radius:50%;overflow:hidden;display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.article-cat-badge-icon img{width:100%;height:100%;object-fit:cover;}
.article-meta .dot{margin:0 6px;color:var(--text-dim);}

/* ページネーション */
.rt-pagination{margin-top:30px;}
.rt-pagination .nav-links{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;}
.rt-pagination a,.rt-pagination span{
  display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:38px;padding:0 12px;
  border-radius:8px;border:1px solid var(--border);background:var(--panel);font-size:13.5px;color:var(--text-dim);
}
.rt-pagination a:hover{color:#fff;border-color:var(--blue);}
.rt-pagination .current{background:var(--blue);color:#fff;border-color:var(--blue);}

@media(max-width:1080px){
  .hero-grid{grid-template-columns:1fr;min-height:auto;padding:44px 0;}
  .cat-grid{grid-template-columns:repeat(3,1fr);}
  .topics-grid{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.4fr repeat(2,1fr);gap:20px;}
  .layout-with-sidebar{grid-template-columns:1fr 260px;gap:24px;}
}
@media(max-width:900px){
  .layout-with-sidebar{grid-template-columns:1fr;}
  .rt-sidebar{position:static;flex-direction:row;flex-wrap:wrap;}
  .rt-sidebar .widget-box{flex:1;min-width:260px;}
}
@media(max-width:760px){
  .container{padding:0 18px;}
  .main-nav{display:none;}
  .menu-toggle{display:flex;}
  .cat-grid{grid-template-columns:1fr;gap:10px;}
  .topics-grid{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .hero-grid{grid-template-columns:1fr;padding:32px 0;min-height:auto;gap:20px;}
  .hero-copy{padding:0 6px;}
  .hero-copy h1{font-size:25px;}
  .hero-copy p{font-size:13.5px;}
  .hero-line-break{display:none;}
  .hero-actions{flex-wrap:wrap;}
  .btn{padding:10px 16px;font-size:12.5px;}
  .market-card{max-width:100%;}
  .section{padding:26px 0;}
  .section-head{flex-wrap:wrap;gap:8px;}
  .article-title{font-size:22px;}
  .archive-banner{padding:18px 0 24px;}
  .archive-banner-icon{width:44px;height:44px;border-radius:10px;}
  .archive-banner-text h1{font-size:19px;}
  .rt-sidebar{flex-direction:column;}
  .rt-sidebar .widget-box{min-width:0;}
  .footer-brand p{max-width:100%;}
}
@media(max-width:480px){
  .container{padding:0 14px;}
  .header-inner{gap:10px;}
  .brand{max-width:none;gap:8px;}
  .brand-mark{width:36px;height:36px;}
  .brand-text .name{font-size:14.5px;white-space:nowrap;}
  .brand-text .tagline{font-size:7.5px;white-space:nowrap;overflow:visible;letter-spacing:-.01em;}
  .cat-grid{grid-template-columns:1fr;gap:10px;}
  .cat-card{padding:14px 16px;flex-direction:row;justify-content:flex-start;align-items:center;text-align:left;gap:14px;}
  .cat-card .cat-name{justify-content:space-between;flex:1;}
  .cat-icon{width:38px;height:38px;}
  .hero-copy{padding:0 6px;}
  .hero-copy h1{font-size:21px;}
  .hero-actions{flex-direction:row;gap:8px;}
  .btn{justify-content:center;flex:1;padding:9px 10px;font-size:11.5px;gap:5px;}
  .market-figure .value{font-size:28px;}
  .news-item{flex-direction:column;}
  .news-item .ph-image{width:100%;height:150px;}
  .footer-col-2col ul{grid-template-columns:1fr;}
  .widget-box{padding:16px;}
  .single-article,.related-articles{max-width:100%;}
  .article-share{flex-wrap:wrap;}
  .rt-pagination a,.rt-pagination span{min-width:34px;height:34px;padding:0 8px;font-size:12.5px;}
}