/*
Theme Name: ReSkill Base
Theme URI: https://reskillbase.com
Author: ReSkill Base
Description: Japanese editorial media theme for practical AI, IT and career learning.
Version: 2.1.0
Requires at least: 6.5
Requires PHP: 8.1
License: GNU General Public License v2 or later
Text Domain: reskill-base
*/
:root{--ink:#17191c;--sub:#5d6268;--paper:#fff;--wash:#f4f3ef;--line:#d8d8d4;--brand:#00594f;--brand-dark:#003f38;--accent:#b34a2d;--focus:#087ea4;--reading:720px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic",YuGothic,"Noto Sans JP",sans-serif;font-size:16px;line-height:1.85}img{max-width:100%;height:auto}a{color:var(--brand);text-underline-offset:.2em;text-decoration-thickness:1px}a:hover{color:var(--accent)}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.rb-container{width:min(1200px,calc(100% - 48px));margin-inline:auto}.rb-reading{width:min(var(--reading),calc(100% - 32px));margin-inline:auto}.skip-link,.screen-reader-text{position:absolute;left:-9999px}.skip-link:focus,.screen-reader-text:focus{z-index:100;top:12px;left:12px;padding:9px 14px;color:#fff;background:#111}
.site-header{position:relative;z-index:30;border-bottom:1px solid var(--ink);background:#fff}.rb-header-top{display:flex;min-height:88px;align-items:center;justify-content:space-between}.site-branding{display:flex;align-items:baseline;gap:17px;color:var(--ink);text-decoration:none}.site-title{font-family:Georgia,"Times New Roman",serif;font-size:1.75rem;font-weight:700;letter-spacing:-.035em}.site-tagline{color:var(--sub);font-size:.68rem;font-weight:700;letter-spacing:.15em}.custom-logo{display:block;max-height:52px;width:auto}.rb-header-actions{display:flex;gap:8px}.search-toggle,.menu-toggle{min-width:48px;min-height:44px;padding:6px 10px;border:0;color:var(--ink);background:#fff;font:inherit;font-size:.75rem}.search-toggle span:first-child{font-size:1.3rem}.menu-toggle{display:none}.primary-navigation{border-top:1px solid var(--line)}.primary-navigation ul{display:flex;justify-content:center;gap:clamp(20px,3.3vw,48px);margin:0;padding:0;list-style:none}.primary-navigation a{display:block;padding:13px 0 12px;color:var(--ink);font-size:.88rem;font-weight:700;text-decoration:none}.primary-navigation a:hover,.primary-navigation .current-menu-item a{color:var(--brand);box-shadow:inset 0 -3px var(--brand)}.rb-search-panel{padding:20px 0;border-top:1px solid var(--line);background:var(--wash)}.search-form{display:flex;max-width:720px;margin:auto}.search-field{width:100%;min-height:48px;padding:8px 12px;border:1px solid #777;border-right:0;background:#fff;font:inherit}.search-submit{min-height:48px;padding:8px 22px;border:1px solid var(--ink);color:#fff;background:var(--ink);font:inherit;font-weight:700}
.rb-lead{padding:46px 0 38px;border-bottom:1px solid var(--line)}.rb-kicker,.rb-section-rule>p,.rb-author-label{margin:0;color:var(--brand);font-family:Arial,sans-serif;font-size:.74rem;font-weight:800;letter-spacing:.16em}.rb-lead h1{max-width:800px;margin:10px 0 12px;font-family:Georgia,"Yu Mincho",serif;font-size:clamp(2.2rem,4.4vw,4.15rem);font-weight:500;line-height:1.28;letter-spacing:-.055em}.rb-lead>p:last-child{max-width:620px;margin:0;color:var(--sub);font-size:1.05rem}.rb-feature-section{padding:40px 0 68px}.rb-section-rule{display:grid;grid-template-columns:145px 1fr auto;align-items:baseline;margin-bottom:28px;padding-top:13px;border-top:2px solid var(--ink)}.rb-section-rule h2{margin:0;font-family:Georgia,"Yu Mincho",serif;font-size:clamp(1.55rem,3vw,2.35rem);font-weight:500;letter-spacing:-.03em}.rb-section-rule>a{font-size:.84rem;font-weight:700}.rb-feature-story{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.8fr);border-bottom:1px solid var(--line)}.rb-feature-image{display:block;min-height:400px;background:#e9ece7;text-decoration:none}.rb-feature-image img{display:block;width:100%;height:100%;aspect-ratio:16/9;object-fit:cover}.rb-image-placeholder{display:block;width:100%;height:100%;min-height:220px;object-fit:cover;background:#e8ece7}.rb-feature-copy{display:flex;flex-direction:column;justify-content:center;padding:36px 0 36px 44px}.rb-category{color:var(--brand);font-size:.78rem;font-weight:800;text-decoration:none}.rb-feature-copy h3{margin:12px 0 17px;font-family:Georgia,"Yu Mincho",serif;font-size:clamp(1.65rem,3vw,2.65rem);font-weight:500;line-height:1.5}.rb-feature-copy h3 a,.rb-card h3 a,.rb-ranking h3 a{color:var(--ink);text-decoration:none}.rb-feature-copy>p{margin:0;color:#4c5156;font-size:.96rem}.rb-story-meta{display:flex;justify-content:space-between;gap:16px;margin-top:28px;padding-top:14px;border-top:1px solid var(--line);font-size:.8rem}.rb-story-meta time,.rb-card-meta time,.rb-ranking time{color:var(--sub)}
.rb-section{padding:70px 0}.rb-latest-list{border-top:1px solid var(--line)}.rb-card{min-width:0}.rb-card--latest{display:grid;grid-template-columns:220px 1fr;gap:28px;padding:24px 0;border-bottom:1px solid var(--line)}.rb-card-image{display:block;background:#e9ece7;text-decoration:none}.rb-card-image img{display:block;width:100%;height:100%;aspect-ratio:16/10;object-fit:cover}.rb-card--latest .rb-image-placeholder{min-height:138px}.rb-card-meta{display:flex;gap:16px;align-items:center;font-size:.78rem}.rb-card h3{margin:7px 0;font-family:Georgia,"Yu Mincho",serif;font-size:1.3rem;font-weight:500;line-height:1.55}.rb-card-excerpt{color:#50555a;font-size:.9rem}.rb-card-excerpt p{margin:0}.rb-section--ink{color:#fff;background:#202725}.rb-section--ink .rb-section-rule{border-color:#fff}.rb-section--ink .rb-section-rule>p{color:#72b9ad}.rb-ranking-list{display:grid;grid-template-columns:repeat(3,1fr);gap:38px}.rb-ranking{display:grid;grid-template-columns:48px 1fr;gap:17px;padding-top:19px;border-top:1px solid #65716e}.rb-ranking>span{font-family:Georgia,serif;font-size:2rem;color:#72b9ad}.rb-ranking h3{margin:5px 0 13px;font-family:Georgia,"Yu Mincho",serif;font-size:1.16rem;font-weight:500;line-height:1.55}.rb-ranking h3 a{color:#fff}.rb-ranking .rb-category{color:#72b9ad}.rb-ranking time{font-size:.76rem;color:#c1c9c7}.rb-topic-index{border-top:1px solid var(--line)}.rb-topic-index>a{display:grid;grid-template-columns:230px 1fr auto;align-items:center;gap:30px;padding:21px 4px;border-bottom:1px solid var(--line);color:var(--ink);text-decoration:none}.rb-topic-index span{font-family:Georgia,"Yu Mincho",serif;font-size:1.35rem}.rb-topic-index small{color:var(--sub)}.rb-topic-index b{color:var(--brand)}.rb-guide-band{padding:62px 0;background:var(--wash)}.rb-guide-layout{display:grid;grid-template-columns:1fr 1fr;gap:90px}.rb-guide-layout h2{margin:10px 0;font-family:Georgia,"Yu Mincho",serif;font-size:2rem;font-weight:500}.rb-guide-layout p{color:var(--sub)}.rb-guide-layout nav{border-top:1px solid var(--ink)}.rb-guide-layout nav a{display:flex;justify-content:space-between;padding:17px 0;border-bottom:1px solid var(--line);color:var(--ink);font-weight:700;text-decoration:none}
.rb-breadcrumb{padding:18px 0;color:var(--sub);font-size:.78rem}.rb-breadcrumb ol{display:flex;flex-wrap:wrap;gap:7px;margin:0;padding:0;list-style:none}.rb-breadcrumb li:not(:last-child)::after{content:"/";margin-left:7px}.rb-breadcrumb a{color:inherit}.site-main{padding-bottom:85px}.rb-archive-header{padding:45px 0 28px;border-bottom:2px solid var(--ink)}.rb-archive-header h1,.rb-article-header h1{font-family:Georgia,"Yu Mincho",serif;font-weight:500;letter-spacing:-.035em}.rb-archive-header h1{margin:5px 0;font-size:clamp(2rem,4vw,3.5rem)}.rb-archive-description{max-width:720px;color:var(--sub)}.rb-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0 28px;padding:35px 0}.rb-card--standard{border-bottom:1px solid var(--line);padding-bottom:25px}.rb-card--standard .rb-card-body{padding-top:14px}.rb-pagination{margin:25px 0}.nav-links{display:flex;gap:8px}.page-numbers{display:grid;min-width:44px;min-height:44px;place-items:center;border:1px solid var(--line)}
.rb-article-header{padding:35px 0 30px}.rb-article-header h1{margin:13px 0 18px;font-size:clamp(2.15rem,5vw,3.6rem);line-height:1.35}.rb-article-lead{color:var(--sub);font-family:Georgia,"Yu Mincho",serif;font-size:1.06rem}.rb-article-byline{display:flex;align-items:end;justify-content:space-between;margin-top:25px;padding-top:18px;border-top:1px solid var(--line)}.rb-article-byline>div{display:flex;align-items:center;gap:10px}.rb-article-byline img{border-radius:50%}.rb-article-byline span{display:grid;font-size:.82rem}.rb-article-byline small{color:var(--sub)}.rb-article-byline dl{display:flex;gap:20px;margin:0;font-size:.78rem}.rb-article-byline dl div{display:flex;gap:6px}.rb-article-byline dt{color:var(--sub)}.rb-article-byline dd{margin:0}.rb-ad-note{margin:22px 0 0;padding:11px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--sub);font-size:.8rem}.rb-featured{width:min(1040px,calc(100% - 48px));margin:0 auto 50px}.rb-featured img{display:block;width:100%;aspect-ratio:16/8.5;object-fit:cover}.rb-article-layout{position:relative}.rb-article-rail{position:absolute;left:0;width:170px;padding-top:12px;border-top:2px solid var(--ink);color:var(--sub);font-size:.76rem}.rb-article-rail p{margin:0;color:var(--ink);font-weight:700}.rb-article-rail ul{padding-left:17px}.entry-content{color:#26292d;font-family:Georgia,"Yu Mincho",serif;font-size:1.04rem;line-height:2}.entry-content h2{margin:2.7em 0 .9em;padding-bottom:.45em;border-bottom:2px solid var(--ink);font-size:clamp(1.45rem,3vw,2rem);line-height:1.5}.entry-content h3{margin:2.2em 0 .65em;font-size:1.3rem;line-height:1.55}.entry-content ul,.entry-content ol{padding-left:1.4em}.entry-content blockquote{margin:2em 0;padding:16px 22px;border-left:4px solid var(--brand);background:var(--wash)}.entry-content table{width:100%;margin:2em 0;border-collapse:collapse;font-family:"Yu Gothic",sans-serif;font-size:.84rem}.entry-content th,.entry-content td{padding:12px;border:1px solid #aaa;text-align:left;vertical-align:top}.entry-content th{background:#e8ece9}.rb-cta{margin:38px 0;padding:25px 28px;border-top:3px solid var(--brand);border-bottom:1px solid var(--line);background:#f1f5f3}.rb-button{display:inline-flex;min-height:48px;align-items:center;padding:9px 20px;color:#fff;background:var(--brand);font-family:"Yu Gothic",sans-serif;font-weight:700;text-decoration:none}.rb-button:hover{color:#fff;background:var(--brand-dark)}.rb-pros-cons{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin:30px 0;background:var(--line)}.rb-pros,.rb-cons{padding:20px;background:#fff}.rb-alert{margin:26px 0;padding:15px 18px;border-left:4px solid var(--brand);background:var(--wash)}.rb-alert--warning{border-color:var(--accent)}.rb-author-box{display:grid;grid-template-columns:72px 1fr;gap:20px;margin-top:65px;padding:24px 0;border-top:2px solid var(--ink);border-bottom:1px solid var(--line);font-family:"Yu Gothic",sans-serif}.rb-author-box img{border-radius:50%}.rb-author-box h2{margin:2px 0;border:0;padding:0;font-size:1.15rem}.rb-author-box p{margin:5px 0;color:var(--sub);font-size:.8rem;line-height:1.7}.rb-fact-stamp{color:var(--brand)!important;font-weight:700}.rb-related{margin-top:55px}.rb-related>h2{font-family:"Yu Gothic",sans-serif;font-size:1.35rem}.rb-related .rb-card{display:grid;grid-template-columns:130px 1fr;gap:17px;padding:16px 0;border-top:1px solid var(--line);font-family:"Yu Gothic",sans-serif}.rb-related .rb-image-placeholder{min-height:80px}.rb-related h3{font-family:Georgia,"Yu Mincho",serif;font-size:1rem}.rb-related .rb-card-excerpt{display:none}
.site-footer{padding:60px 0 28px;color:#d7dcda;background:#151b1a}.rb-footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:90px}.rb-footer-title{color:#fff;font-family:Georgia,serif;font-size:1.8rem}.rb-footer-copy{max-width:480px;color:#aeb7b4;font-size:.84rem}.rb-footer-label{margin:0 0 12px;color:#fff;font-size:.8rem;font-weight:700}.rb-policy-links{display:grid;grid-template-columns:1fr 1fr;gap:8px 22px}.rb-policy-links a{color:#d7dcda;font-size:.82rem}.rb-footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:42px;padding-top:17px;border-top:1px solid #46504e;color:#909a97;font-size:.74rem}
@media(max-width:900px){.rb-container{width:min(100% - 32px,1200px)}.menu-toggle{display:block}.primary-navigation{display:none;position:absolute;inset:100% 0 auto;width:100%;padding:10px 16px 18px;border-bottom:1px solid var(--ink);background:#fff}.primary-navigation.is-open{display:block}.primary-navigation ul{display:grid;gap:0}.primary-navigation a{min-height:44px;border-bottom:1px solid var(--line)}.rb-feature-story{grid-template-columns:1fr}.rb-feature-copy{padding:28px 0}.rb-ranking-list{gap:20px}.rb-article-rail{display:none}.rb-card-grid{grid-template-columns:repeat(2,1fr)}.rb-guide-layout{gap:40px}}
@media(max-width:600px){body{font-size:15px}.rb-container,.rb-reading,.rb-featured{width:min(100% - 24px,1200px)}.rb-header-top{min-height:66px}.site-branding{display:grid;gap:0}.site-title{font-size:1.4rem}.site-tagline{font-size:.62rem}.search-toggle span:last-child,.menu-toggle span{font-size:.75rem}.rb-lead{padding:28px 0 24px}.rb-lead h1{font-size:2.05rem;line-height:1.3}.rb-lead>p:last-child{font-size:.96rem;line-height:1.75}.rb-feature-section{padding:28px 0 44px}.rb-section{padding:44px 0}.rb-section-rule{grid-template-columns:1fr auto;gap:3px}.rb-section-rule>p{grid-column:1/-1}.rb-feature-image{min-height:205px}.rb-feature-copy{padding:22px 0}.rb-feature-copy h3{font-size:1.55rem;line-height:1.5}.rb-card--latest{grid-template-columns:112px 1fr;gap:14px;padding:18px 0}.rb-card--latest .rb-image-placeholder{min-height:76px}.rb-card h3{margin-top:5px;font-size:1.08rem;line-height:1.5}.rb-card--latest .rb-card-excerpt{display:none}.rb-card-meta{display:grid;gap:0}.rb-ranking-list,.rb-card-grid{grid-template-columns:1fr}.rb-ranking{padding:18px 0 22px}.rb-ranking h3{font-size:1.08rem}.rb-topic-index>a{grid-template-columns:1fr auto;gap:4px 12px}.rb-topic-index small{grid-column:1}.rb-topic-index b{grid-column:2;grid-row:1/3}.rb-guide-layout,.rb-footer-grid{grid-template-columns:1fr;gap:28px}.rb-article-header{padding-top:20px}.rb-article-header h1{font-size:2.05rem}.rb-article-byline{display:grid;gap:14px}.rb-featured{margin-bottom:28px}.entry-content{font-size:1rem;line-height:1.95}.entry-content table{display:block;max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.rb-pros-cons{grid-template-columns:1fr}.rb-author-box{grid-template-columns:52px 1fr}.rb-policy-links{grid-template-columns:1fr}.rb-footer-bottom{display:grid}.rb-disclosure{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}