/*
Theme Name: HUB-TIPS TechBlog
Theme URI: https://hub-tips.com/blog
Author: HUB-TIPS Inc.
Description: HUB-TIPS TechBlog custom theme
Version: 1.0
Text Domain: hubtips-blog
*/

/* ===== Reset & Variables ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --ink:#0a0a0f;--white:#fafaf9;--accent:#0066ff;--accent-light:#3d8bff;
  --gray-100:#f4f4f2;--gray-200:#e8e8e4;--gray-400:#9c9c96;--gray-600:#5a5a54;
  --orange:#ff6b2b;--green:#00c27a;--radius:16px;
  --font-jp:'Noto Sans JP',sans-serif;--font-en:'DM Sans',sans-serif;--font-display:'Syne',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font-jp);color:var(--ink);background:var(--white);line-height:1.8;overflow-x:hidden;-webkit-font-smoothing:antialiased}

/* ===== Accessibility: Skip Link ===== */
.skip-link{position:absolute;left:-9999px;top:0;z-index:9999;padding:12px 24px;background:var(--accent);color:#fff;font-size:14px;font-weight:700;text-decoration:none;border-radius:0 0 8px 0}
.skip-link:focus{left:0;top:0}

/* ===== Accessibility: Focus Visible ===== */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
a{color:var(--accent);text-decoration:none;transition:color .3s}
a:hover{color:var(--ink)}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

/* ===== Header ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;padding:20px 0;background:rgba(250,250,249,.92);backdrop-filter:blur(20px);box-shadow:0 1px 0 rgba(0,0,0,.06);transition:all .4s}
.site-header .container{display:flex;align-items:center;justify-content:space-between}
.logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-en);font-size:24px;font-weight:700;color:var(--ink);text-decoration:none;letter-spacing:-.5px}
.logo-icon{height:36px;width:auto;flex-shrink:0}
.logo-sub{font-family:var(--font-en);font-size:11px;font-weight:500;color:var(--gray-400);margin-left:12px;letter-spacing:1px}
.header-nav{display:flex;align-items:center;gap:28px}
.header-nav a{font-family:var(--font-jp);font-size:13px;font-weight:500;color:var(--gray-600);text-decoration:none;transition:color .3s}
.header-nav a:hover{color:var(--ink)}
.nav-cta{background:var(--ink)!important;color:#fff!important;padding:10px 24px;border-radius:100px;font-size:13px!important;border:1px solid var(--ink)!important;transition:all .3s!important}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.mobile-menu-btn{display:none;background:none;border:none;cursor:pointer;padding:8px;-webkit-appearance:none;appearance:none}

/* ===== Blog Hero ===== */
.blog-hero{padding:140px 0 60px;background:var(--ink);color:#fff;position:relative;overflow:hidden}
.blog-hero::before{content:'';position:absolute;top:50%;right:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(0,102,255,.12) 0%,transparent 70%);transform:translateY(-50%)}
.blog-hero .container{position:relative;z-index:2}
.blog-hero-label{font-family:var(--font-en);font-size:12px;font-weight:700;letter-spacing:4px;text-transform:uppercase;color:var(--accent-light);margin-bottom:12px}
.blog-hero h1{font-size:clamp(28px,4vw,44px);font-weight:900;line-height:1.3;letter-spacing:-1px}
.blog-hero p{font-size:15px;color:rgba(255,255,255,.7);margin-top:12px}

/* ===== Main Layout ===== */
.blog-main{padding:80px 0 120px;background:var(--white)}
.blog-layout{display:grid;grid-template-columns:1fr 320px;gap:48px}

/* ===== Post Cards ===== */
.posts-grid{display:grid;grid-template-columns:1fr;gap:32px}
.post-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:2px solid var(--gray-200);transition:all .3s}
.post-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,102,255,.08)}
.post-card-thumb{height:200px;overflow:hidden;background:var(--gray-100)}
.post-card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.post-card:hover .post-card-thumb img{transform:scale(1.05)}
.post-card-body{padding:28px 24px}
.post-card-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;font-size:12px;color:var(--gray-600)}
.post-card-cat{font-family:var(--font-en);font-size:11px;font-weight:700;padding:4px 12px;border-radius:100px;background:rgba(0,102,255,.08);color:var(--accent);letter-spacing:.5px}
.post-card-date{font-family:var(--font-en);font-size:12px;color:var(--gray-600)}
.post-card-body h2{font-size:18px;font-weight:700;line-height:1.6;margin-bottom:10px}
.post-card-body h2 a{color:var(--ink);text-decoration:none}
.post-card-body h2 a:hover{color:var(--accent)}
.post-card-excerpt{font-size:14px;color:var(--gray-600);line-height:1.9;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-card-readmore{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13px;font-weight:600;color:var(--accent);transition:gap .3s}
.post-card-readmore:hover{gap:10px;color:var(--ink)}

/* ===== Sidebar ===== */
.sidebar{display:flex;flex-direction:column;gap:32px}
.sidebar-widget{background:#fff;border-radius:var(--radius);padding:28px 24px;border:2px solid var(--gray-200)}
.sidebar-widget h3{font-family:var(--font-en);font-size:12px;font-weight:700;letter-spacing:3px;text-transform:uppercase;color:var(--accent);margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--gray-200)}
.sidebar-widget ul{list-style:none}
.sidebar-widget ul li{padding:10px 0;border-bottom:1px solid var(--gray-200);font-size:14px}
.sidebar-widget ul li:last-child{border-bottom:none}
.sidebar-widget ul li a{color:var(--gray-600);text-decoration:none;display:flex;justify-content:space-between;align-items:center}
.sidebar-widget ul li a:hover{color:var(--accent)}
.sidebar-widget ul li a .count{font-family:var(--font-en);font-size:12px;color:var(--gray-400)}

/* ===== Single Post ===== */
.single-hero{padding:140px 0 40px;background:var(--ink);color:#fff;position:relative;overflow:hidden}
.single-hero::before{content:'';position:absolute;top:50%;right:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(0,102,255,.12) 0%,transparent 70%);transform:translateY(-50%)}
.single-hero .container{position:relative;z-index:2}
.single-meta{display:flex;align-items:center;gap:16px;margin-bottom:16px}
.single-cat{font-family:var(--font-en);font-size:11px;font-weight:700;padding:4px 14px;border-radius:100px;background:rgba(0,102,255,.2);color:var(--accent-light);letter-spacing:.5px}
.single-date{font-family:var(--font-en);font-size:13px;color:rgba(255,255,255,.7)}
.single-hero h1{font-size:clamp(24px,3.5vw,36px);font-weight:900;line-height:1.5;letter-spacing:-.5px}

.single-content{padding:60px 0 120px}
.single-content .container{max-width:900px}
.single-content .entry-content{font-size:16px;line-height:2.2;color:var(--ink)}
.entry-content h2{font-size:24px;font-weight:900;margin:56px 0 20px;padding-bottom:12px;border-bottom:3px solid var(--accent);letter-spacing:-.5px}
.entry-content h3{font-size:20px;font-weight:700;margin:40px 0 16px;padding-left:16px;border-left:4px solid var(--accent)}
.entry-content p{margin-bottom:24px}
.entry-content ul,.entry-content ol{margin:0 0 24px 24px}
.entry-content li{margin-bottom:8px}
.entry-content blockquote{background:var(--gray-100);border-left:4px solid var(--accent);padding:24px 28px;margin:32px 0;border-radius:0 var(--radius) var(--radius) 0;font-size:15px;color:var(--gray-600)}
.entry-content pre{background:var(--ink);color:#e0e0e0;padding:24px;border-radius:var(--radius);overflow-x:auto;margin:32px 0;font-size:14px;line-height:1.7}
.entry-content code{font-family:'Fira Code',monospace;font-size:.9em}
.entry-content p code{background:var(--gray-100);padding:2px 8px;border-radius:6px;color:var(--accent);font-size:.85em}
.entry-content img{border-radius:var(--radius);margin:24px 0}
.entry-content table{width:100%;border-collapse:collapse;margin:24px 0}
.entry-content th,.entry-content td{padding:12px 16px;border:1px solid var(--gray-200);font-size:14px}
.entry-content th{background:var(--gray-100);font-weight:700;text-align:left}

/* ===== Pagination ===== */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:48px}
.pagination a,.pagination span{font-family:var(--font-en);font-size:14px;font-weight:500;padding:10px 16px;border-radius:8px;text-decoration:none;transition:all .3s}
.pagination a{color:var(--gray-600);background:var(--gray-100)}
.pagination a:hover{background:var(--accent);color:#fff}
.pagination .current{background:var(--accent);color:#fff}

/* ===== Post Navigation ===== */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:64px;padding-top:40px;border-top:2px solid var(--gray-200)}
.post-nav a{display:block;padding:20px;background:var(--gray-100);border-radius:var(--radius);text-decoration:none;transition:all .3s}
.post-nav a:hover{background:var(--accent);color:#fff}
.post-nav-label{font-family:var(--font-en);font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--gray-600);margin-bottom:8px}
.post-nav a:hover .post-nav-label{color:rgba(255,255,255,.6)}
.post-nav-title{font-size:14px;font-weight:700;color:var(--ink);line-height:1.6}
.post-nav a:hover .post-nav-title{color:#fff}
.post-nav-next{text-align:right}

/* ===== Footer ===== */
.site-footer{background:var(--ink);border-top:1px solid rgba(255,255,255,.06);padding:60px 0 40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer-brand .logo{color:#fff}
.footer-desc{font-size:13px;color:rgba(255,255,255,.7);margin-top:16px;line-height:1.9}
.footer-heading{font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:rgba(255,255,255,.7);margin-bottom:20px;font-family:var(--font-en)}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.7);text-decoration:none;transition:color .3s}
.footer-links a:hover{color:#fff}
.footer-bottom{padding-top:32px;border-top:1px solid rgba(255,255,255,.06);display:flex;justify-content:space-between;align-items:center}
.footer-copy{font-family:var(--font-en);font-size:12px;color:rgba(255,255,255,.7)}

/* ===== Article Boxes (highlight, warning, CTA) ===== */
.highlight-box{background:rgba(0,102,255,.04);border:1px solid rgba(0,102,255,.15);border-radius:var(--radius);padding:24px 28px;margin:32px 0}
.highlight-box p{margin-bottom:8px;font-size:15px}
.highlight-box p:last-child{margin-bottom:0}
.warning-box{background:#fef9ec;border:1px solid #fde68a;border-radius:var(--radius);padding:24px 28px;margin:32px 0}
.warning-box p{margin-bottom:8px;font-size:15px}
.warning-box p:last-child{margin-bottom:0}
.cost-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px}
.cost-table th,.cost-table td{padding:14px 16px;border:1px solid var(--gray-200);text-align:left;line-height:1.8}
.cost-table th{background:var(--gray-100);font-weight:700;color:var(--ink);font-size:13px}
.cost-table td{color:var(--gray-600)}
.cost-table td strong{color:var(--accent)}
.article-faq{margin:40px 0}
.article-faq-item{border:1px solid var(--gray-200);border-radius:12px;margin-bottom:12px;overflow:hidden}
.article-faq-q{font-size:15px;font-weight:700;padding:18px 20px;background:var(--gray-100);color:var(--ink);display:flex;align-items:flex-start;gap:10px}
.article-faq-q::before{content:"Q";display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;background:var(--accent);color:#fff;border-radius:6px;font-size:12px;font-weight:700;flex-shrink:0}
.article-faq-a{font-size:14px;padding:16px 20px 20px 56px;color:var(--gray-600);line-height:1.9}
.article-cta{text-align:center;margin:56px 0 32px;padding:40px 28px;background:var(--ink);border-radius:var(--radius);position:relative;overflow:hidden}
.article-cta::before{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:400px;height:400px;background:radial-gradient(circle,rgba(0,102,255,.12) 0%,transparent 70%)}
.article-cta *{position:relative;z-index:2}
.article-cta h3{font-size:20px;font-weight:900;color:#fff;margin-bottom:12px}
.article-cta p{font-size:14px;color:rgba(255,255,255,.7);margin-bottom:24px;line-height:1.8}
.article-cta a{display:inline-block;padding:14px 36px;background:var(--accent);color:#fff;text-decoration:none;border-radius:100px;font-weight:700;font-size:14px;transition:all .3s;margin:0 8px}
.article-cta a:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,102,255,.4);color:#fff}
.entry-content .highlight-box strong,.entry-content .warning-box strong{color:var(--accent)}

/* ===== Accessibility: Reduced Motion ===== */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* ===== Responsive ===== */
@media(max-width:768px){
  .blog-layout{grid-template-columns:1fr}
  .blog-hero{padding:120px 0 50px}
  .single-hero{padding:120px 0 30px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:12px}
  .post-nav{grid-template-columns:1fr}
  .mobile-menu-btn{display:flex!important;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:40px;height:40px;background:none;border:none}
  .mobile-menu-btn span{display:block;width:22px;height:2px;background:var(--ink);transition:all .3s;transform-origin:center;margin:0}
  .mobile-menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .mobile-menu-btn.active span:nth-child(2){opacity:0}
  .mobile-menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  .header-nav{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(250,250,249,.98);backdrop-filter:blur(20px);flex-direction:column;padding:16px 24px 24px;gap:0;box-shadow:0 8px 32px rgba(0,0,0,.1);border-top:1px solid var(--gray-200)}
  .header-nav.open{display:flex}
  .header-nav a{padding:14px 0;font-size:15px;border-bottom:1px solid var(--gray-200);width:100%}
  .header-nav a:last-child{border-bottom:none}
  .header-nav .nav-cta{margin-top:12px;text-align:center;border-bottom:none!important}
  .site-header .container{position:relative}
  .cost-table{font-size:13px;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .cost-table th,.cost-table td{padding:10px 12px;white-space:nowrap}
  .highlight-box,.warning-box{padding:20px}
  .article-cta{padding:32px 20px}
  .article-cta a{margin:4px 8px;padding:12px 28px;font-size:13px}
  .article-faq-q{font-size:14px;padding:14px 16px}
  .article-faq-a{padding:12px 16px 16px 48px;font-size:13px}
}