/*
Theme Name: Số Định Danh
Theme URI: https://sodinhdanh.com/
Author: Số Định Danh
Author URI: https://sodinhdanh.com/gioi-thieu.html
Description: Theme tùy chỉnh cho trang Số Định Danh - giải thích số định danh cá nhân, định danh điện tử VNeID và biển số định danh tại Việt Nam.
Version: 1.0
Requires at least: 5.9
Requires PHP: 7.4
Text Domain: sodinhdanh
*/

:root{
  --ink:#0f1720;
  --ink-soft:#4b5563;
  --ink-muted:#8a94a3;
  --line:#e4e8ee;
  --bg:#ffffff;
  --bg-alt:#f6f8fb;
  --accent:#0c5aa6;
  --accent-dark:#083f77;
  --accent-bg:#eaf2fb;
  --green:#1a7a44;
  --green-bg:#e8f6ee;
  --amber:#8a5a08;
  --amber-bg:#fbf1de;
  --radius:10px;
  --maxw:1080px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.skip-link{
  position:absolute;left:-999px;top:0;background:var(--accent);color:#fff;
  padding:10px 16px;z-index:200;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0;}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
.icon{width:1em;height:1em;display:inline-block;vertical-align:-0.125em;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

/* header */
header.site{
  border-bottom:1px solid var(--line);
  position:sticky;top:0;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(6px);
  z-index:100;
}
.nav-row{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--ink);flex:none;}
.logo-mark{
  width:34px;height:34px;border-radius:9px;background:var(--accent);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;flex:none;
}
nav.main-nav ul{list-style:none;display:flex;gap:28px;margin:0;padding:0;}
nav.main-nav a{color:var(--ink-soft);font-size:14.5px;font-weight:500;}
nav.main-nav a:hover{color:var(--accent);text-decoration:none;}
nav.main-nav a[aria-current="page"]{color:var(--accent);}
.nav-toggle{display:none;align-items:center;justify-content:center;background:none;border:1px solid var(--line);border-radius:8px;width:40px;height:40px;font-size:20px;color:var(--ink);cursor:pointer;flex:none;}
.header-search{display:flex;align-items:center;gap:6px;flex:none;}
.header-search input{width:200px;height:36px;border:1px solid var(--line);border-radius:var(--radius);padding:0 12px;font-size:13.5px;font-family:inherit;}
.header-search button{height:36px;width:36px;border:1px solid var(--line);border-radius:var(--radius);background:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--ink-soft);}
.header-search button:hover{color:var(--accent);border-color:var(--accent);}

/* hero */
.hero{background:linear-gradient(180deg,var(--accent-bg) 0%,var(--bg) 100%);padding:64px 0 48px;text-align:center;}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--accent-dark);background:#fff;border:1px solid #cfe0f4;
  padding:5px 12px;border-radius:999px;margin-bottom:18px;
}
h1{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:0 0 16px;font-weight:700;letter-spacing:-.01em;}
.lede{font-size:17px;color:var(--ink-soft);max-width:640px;margin:0 auto 28px;}
.search-box{display:flex;gap:8px;max-width:520px;margin:0 auto;}
.search-box input{
  flex:1;height:48px;border:1px solid var(--line);border-radius:var(--radius);
  padding:0 16px;font-size:15px;font-family:inherit;
}
.search-box input:focus{outline:2px solid var(--accent);outline-offset:1px;}
.btn{
  height:48px;padding:0 22px;border-radius:var(--radius);border:none;
  background:var(--accent);color:#fff;font-size:15px;font-weight:600;cursor:pointer;
}
.btn:hover{background:var(--accent-dark);}
.trust-row{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;margin-top:26px;font-size:13px;color:var(--ink-muted);}
.trust-row span{display:flex;align-items:center;gap:6px;}

/* section headings */
.section{padding:56px 0;}
.section.alt{background:var(--bg-alt);}
.section-head{margin-bottom:28px;}
.section-head h2{font-size:24px;margin:0 0 6px;font-weight:700;}
.section-head p{color:var(--ink-soft);margin:0;font-size:15px;}

/* pillar cards */
.pillar-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.pillar-grid-3{grid-template-columns:repeat(3,1fr);}
.pillar-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;
  display:flex;flex-direction:column;gap:14px;transition:border-color .15s,transform .15s;
}
.pillar-card:hover{border-color:var(--accent);transform:translateY(-2px);}
.pillar-icon{
  width:44px;height:44px;border-radius:10px;background:var(--accent-bg);
  color:var(--accent-dark);display:flex;align-items:center;justify-content:center;font-size:20px;
}
.pillar-card h3{margin:0;font-size:19px;}
.pillar-card p{margin:0;color:var(--ink-soft);font-size:14.5px;flex-grow:1;}
.pillar-tags{display:flex;flex-wrap:wrap;gap:6px;}
.tag{background:var(--bg-alt);border:1px solid var(--line);color:var(--ink-soft);font-size:12px;padding:4px 10px;border-radius:999px;}
.pillar-card .cta{font-weight:600;font-size:14px;color:var(--accent);}

/* category grid (homepage quick-nav to every real topic cluster) */
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.category-card{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;
  display:flex;flex-direction:column;gap:8px;transition:border-color .15s,transform .15s,box-shadow .15s;
}
.category-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 6px 18px rgba(12,90,166,.08);}
.category-card .cat-icon{
  width:38px;height:38px;border-radius:10px;background:var(--accent-bg);color:var(--accent-dark);
  display:flex;align-items:center;justify-content:center;font-size:18px;
}
.category-card h3{margin:2px 0 0;font-size:16px;}
.category-card p{margin:0;color:var(--ink-soft);font-size:13.5px;}

/* article list (hub pages / featured) */
.article-list{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;}
.article-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;border-bottom:1px solid var(--line);
}
.article-row:last-child{border-bottom:none;}
.article-row:hover{background:var(--bg-alt);}
.article-title{font-size:15px;font-weight:600;color:var(--ink);margin:0 0 4px;}
.article-meta{font-size:12.5px;color:var(--ink-muted);}
.article-vol{font-size:13px;color:var(--ink-soft);white-space:nowrap;font-variant-numeric:tabular-nums;}
.badge-kd{display:inline-block;margin-left:8px;font-size:11px;background:var(--green-bg);color:var(--green);padding:2px 8px;border-radius:999px;font-weight:600;}

/* faq (accordion enhanced by initFaqAccordion() in site.js; degrades gracefully without JS) */
.faq-item{border-bottom:1px solid var(--line);padding:18px 0;}
.faq-item:first-child{padding-top:0;}
.faq-item:last-child{border-bottom:none;}
.faq-item h3{margin:0 0 8px;font-size:16px;}
.faq-item p{margin:0;color:var(--ink-soft);font-size:14.5px;}
.faq-item h3[role="button"]{
  cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin:0;user-select:none;
}
.faq-item h3[role="button"]:hover{color:var(--accent);}
.faq-item h3[role="button"]::after{
  content:"+";flex:none;width:22px;height:22px;border-radius:50%;background:var(--bg-alt);
  color:var(--ink-soft);display:flex;align-items:center;justify-content:center;font-size:15px;line-height:1;
  transition:transform .15s;
}
.faq-item h3[role="button"][aria-expanded="true"]::after{content:"\2212";}
.faq-item h3[role="button"] + p{margin-top:10px;overflow:hidden;}

/* stat chip on pillar cards */
.pillar-stat{font-size:12.5px;color:var(--ink-muted);font-variant-numeric:tabular-nums;margin-top:-4px;}

/* trust / eeat */
.eeat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.eeat-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;}
.eeat-card .ic{font-size:22px;color:var(--accent);margin-bottom:10px;}
.eeat-card h3{margin:0 0 6px;font-size:15.5px;}
.eeat-card p{margin:0;font-size:13.5px;color:var(--ink-soft);}

/* breadcrumb */
.breadcrumb{font-size:13px;color:var(--ink-muted);padding:16px 0;}
.breadcrumb a{color:var(--ink-muted);}
.breadcrumb a:hover{color:var(--accent);}
.breadcrumb .sep{margin:0 6px;}
.breadcrumb .current{color:var(--ink-soft);}

/* article page */
.article-head{padding:8px 0 32px;border-bottom:1px solid var(--line);margin-bottom:32px;}
.article-head .cat{font-size:12.5px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.03em;}
.article-head h1{margin-top:10px;}
.meta-bar{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--ink-muted);margin-top:14px;}
.meta-bar span{display:flex;align-items:center;gap:6px;}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:48px;padding-bottom:56px;}
.article-body{min-width:0;}
.answer-box{
  background:var(--accent-bg);border:1px solid #cfe0f4;border-radius:14px;
  padding:20px 22px;margin:0 0 32px;font-size:15.5px;color:var(--ink);
}
.answer-box strong{color:var(--accent-dark);}
.article-body h2{font-size:21px;margin:36px 0 14px;font-weight:700;}
.article-body h3{font-size:17px;margin:24px 0 10px;font-weight:600;}
.article-body p{font-size:15.5px;color:var(--ink);margin:0 0 16px;}
.article-body ul,.article-body ol{font-size:15.5px;color:var(--ink);margin:0 0 16px;padding-left:22px;}
.article-body li{margin-bottom:8px;}
.steps{list-style:none;padding:0;margin:0 0 20px;counter-reset:step;}
.steps li{
  position:relative;padding:0 0 0 40px;margin-bottom:16px;counter-increment:step;font-size:15.5px;
}
.steps li::before{
  content:counter(step);position:absolute;left:0;top:0;width:26px;height:26px;
  background:var(--accent);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;
}
.legal-box{
  background:var(--amber-bg);border:1px solid #eddcb3;border-radius:12px;
  padding:18px 20px;margin:24px 0;font-size:14.5px;color:#5c3d05;
}
.legal-box strong{color:var(--amber);}
.legal-box ul{margin:8px 0 0;padding-left:20px;}
.callout-warn{
  background:#fdeeee;border:1px solid #f3c9c9;border-radius:12px;
  padding:16px 18px;margin:20px 0;font-size:14px;color:#7a2020;
}
.takeaway-box{background:var(--bg-alt);border-radius:14px;padding:20px 22px;margin:32px 0 0;}
.takeaway-box h2{margin-top:0 !important;}
.takeaway-box ul{margin-bottom:0;}

.toc{background:var(--bg-alt);border-radius:12px;padding:16px 18px;margin-bottom:24px;}
.toc p{font-size:12.5px;font-weight:600;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.03em;margin:0 0 10px;}
.toc ol{margin:0;padding-left:18px;font-size:13.5px;}
.toc li{margin-bottom:8px;}

aside.sidebar{position:sticky;top:88px;align-self:start;}
.side-box{border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:20px;background:#fff;}
.side-box h4{font-size:13px;text-transform:uppercase;letter-spacing:.03em;color:var(--ink-muted);margin:0 0 12px;}
.side-box ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
.side-box a{font-size:14px;color:var(--ink);}
.side-box a:hover{color:var(--accent);}

.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.related-card{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;}
.related-card .cat{font-size:11.5px;color:var(--accent);font-weight:600;text-transform:uppercase;}
.related-card h3{font-size:14.5px;margin:6px 0 0;}

/* search page */
.search-hero{padding:40px 0 24px;text-align:center;}
.search-summary{font-size:13.5px;color:var(--ink-muted);margin:20px 0 0;}
.search-results{display:flex;flex-direction:column;gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;margin-top:24px;}
.empty-state{text-align:center;padding:48px 20px;color:var(--ink-muted);font-size:14.5px;}

/* pillar hub page */
.hub-hero{padding:40px 0 8px;}
.hub-hero .cat{font-size:12.5px;font-weight:600;color:var(--accent);text-transform:uppercase;}
.hub-hero p{color:var(--ink-soft);font-size:16px;max-width:640px;margin:14px 0 0;}
.filter-row{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0;}
.filter-chip{border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:var(--ink-soft);background:#fff;}

footer.site{border-top:1px solid var(--line);padding:40px 0 28px;background:var(--bg-alt);}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:28px;}
.footer-grid h4{font-size:13px;color:var(--ink-muted);margin:0 0 12px;text-transform:uppercase;letter-spacing:.04em;}
.footer-grid ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px;}
.footer-grid a{color:var(--ink-soft);font-size:14px;}
.footer-note{font-size:12.5px;color:var(--ink-muted);border-top:1px solid var(--line);padding-top:18px;line-height:1.6;}

/* generic content pages (about, sources, contact, privacy) */
.page-head{padding:40px 0 8px;}
.page-body{padding:8px 0 56px;max-width:760px;}
.page-body h2{font-size:20px;margin:32px 0 12px;}
.page-body p{font-size:15.5px;color:var(--ink);margin:0 0 16px;}
.page-body ul{font-size:15.5px;margin:0 0 16px;padding-left:22px;}
.page-body li{margin-bottom:8px;}
.contact-card{border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin:20px 0;background:var(--bg-alt);}

@media (max-width:900px){
  .article-layout{grid-template-columns:1fr;}
  aside.sidebar{position:static;}
  .related-grid{grid-template-columns:1fr;}
  .category-grid{grid-template-columns:1fr 1fr;}
}

@media (max-width:760px){
  .category-grid{grid-template-columns:1fr 1fr;}
  .header-search{display:none;}
  nav.main-nav{
    display:none;position:absolute;left:0;right:0;top:64px;
    background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 16px;
  }
  nav.main-nav.is-open{display:block;}
  nav.main-nav ul{flex-direction:column;gap:0;}
  nav.main-nav li{border-top:1px solid var(--line);}
  nav.main-nav li:first-child{border-top:none;}
  nav.main-nav a{display:block;padding:12px 2px;}
  .nav-toggle{display:flex;}
  .pillar-grid{grid-template-columns:1fr;}
  .eeat-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .article-row{flex-direction:column;align-items:flex-start;gap:4px;}
  .search-box{flex-direction:column;}
  .btn{width:100%;}
}