/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}

/* ── Tokens ── */
:root{
  --blue-dark:#0f3460;--blue-mid:#1a56a0;--blue-light:#2a7de1;
  --blue-pale:#e8f1fd;--teal:#0e7f6e;--teal-pale:#d1f5ef;
  --white:#ffffff;--bg:#f4f8ff;--text-main:#1a1f36;--text-muted:#5a6478;
  --border:#dce6f7;--radius:12px;--shadow:0 2px 12px rgba(15,52,96,0.08);
  --green:#16a34a;--green-pale:#dcfce7;
}

body{font-family:'Plus Jakarta Sans',Arial,sans-serif;background:var(--bg);color:var(--text-main);line-height:1.7;}
.skip-link{position:absolute;left:-9999px;}
.container{max-width:1100px;margin:0 auto;padding:0 24px;}

/* ── Header ── */
.site-header{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:200;}
.nav-inner{max-width:1100px;margin:0 auto;padding:0 24px;height:62px;display:flex;align-items:center;}
.logo{font-size:22px;font-weight:700;color:var(--blue-dark);letter-spacing:-.5px;text-decoration:none;flex-shrink:0;}
.logo span{color:var(--blue-light);}
.nav-right{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-links{display:flex;gap:2px;list-style:none;margin:0;padding:0;}
.nav-links a{text-decoration:none;font-size:14px;font-weight:500;color:var(--text-muted);padding:6px 12px;border-radius:8px;transition:.15s;white-space:nowrap;}
.nav-links a:hover,.nav-links a.active{background:var(--blue-pale);color:var(--blue-light);}
.lang-dd{position:relative;margin-left:6px;}
.lang-btn{display:flex;align-items:center;gap:5px;padding:6px 12px;border-radius:8px;cursor:pointer;background:var(--blue-pale);color:var(--blue-light);border:1px solid var(--border);font-size:14px;font-weight:500;font-family:inherit;white-space:nowrap;transition:.15s;}
.lang-btn:hover,.lang-dd.open .lang-btn{background:var(--blue-light);color:#fff;}
.lang-btn .lc{font-size:10px;transition:transform .2s;margin-left:2px;}
.lang-dd.open .lc{transform:rotate(180deg);}
.lang-menu{display:none;position:absolute;top:calc(100% + 6px);right:0;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 32px rgba(15,52,96,.18);width:230px;z-index:9999;overflow:hidden;}
.lang-dd.open .lang-menu{display:block;}
.lmh{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--text-muted);padding:10px 14px 8px;border-bottom:1px solid var(--border);}
.lml{max-height:300px;overflow-y:auto;}
.lml::-webkit-scrollbar{width:4px;}
.lml::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px;}
.lang-menu a{display:flex;align-items:center;gap:9px;padding:8px 14px;font-size:13px;font-weight:500;color:var(--text-main);text-decoration:none;transition:background .1s;}
.lang-menu a:hover{background:var(--blue-pale);}
.lang-menu a.active{background:var(--blue-pale);color:var(--blue-light);font-weight:700;}
.lf{font-size:15px;width:20px;text-align:center;flex-shrink:0;}
.ln{flex:1;}.le{font-size:11px;color:var(--text-muted);flex-shrink:0;}

/* ── Breadcrumb ── */
.breadcrumb-bar{background:var(--white);border-bottom:1px solid var(--border);padding:10px 0;}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted);list-style:none;}
.breadcrumb a{color:var(--text-muted);text-decoration:none;}.breadcrumb a:hover{color:var(--blue-light);}
.breadcrumb li:not(:last-child)::after{content:'›';margin-left:6px;}

/* ── Blog index page ── */
.blog-hero{background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue-mid) 100%);color:#fff;padding:56px 0 48px;text-align:center;}
.blog-hero h1{font-size:clamp(28px,5vw,44px);font-weight:700;letter-spacing:-1px;margin-bottom:14px;}
.blog-hero p{font-size:17px;color:rgba(255,255,255,.85);max-width:580px;margin:0 auto;}

.blog-section{padding:56px 0;}
.blog-section-title{font-size:22px;font-weight:700;color:var(--blue-dark);margin-bottom:24px;padding-bottom:12px;border-bottom:2px solid var(--blue-pale);}

.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;margin-bottom:48px;}
.blog-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;text-decoration:none;color:var(--text-main);display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s,border-color .18s;box-shadow:var(--shadow);}
.blog-card:hover{transform:translateY(-3px);box-shadow:0 8px 28px rgba(15,52,96,.13);border-color:var(--blue-light);}
.blog-card-img{width:100%;height:180px;object-fit:cover;background:var(--blue-pale);display:flex;align-items:center;justify-content:center;font-size:48px;}
.blog-card-body{padding:20px;flex:1;display:flex;flex-direction:column;gap:8px;}
.blog-card-tag{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--blue-light);}
.blog-card-title{font-size:17px;font-weight:700;color:var(--text-main);line-height:1.35;}
.blog-card-excerpt{font-size:14px;color:var(--text-muted);line-height:1.6;flex:1;}
.blog-card-meta{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:12px;margin-top:8px;}
.blog-card-meta span{display:flex;align-items:center;gap:4px;}

/* ── CTA banner ── */
.cta-banner{background:linear-gradient(135deg,var(--blue-dark),var(--blue-mid));color:#fff;border-radius:16px;padding:36px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;margin:48px 0;}
.cta-banner h3{font-size:22px;font-weight:700;margin-bottom:6px;}
.cta-banner p{font-size:15px;color:rgba(255,255,255,.8);max-width:480px;}
.cta-btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;background:#fff;color:var(--blue-dark);border-radius:10px;font-size:15px;font-weight:700;text-decoration:none;white-space:nowrap;transition:.15s;flex-shrink:0;}
.cta-btn:hover{background:#e8f1fd;transform:translateY(-1px);}

/* ── Article page ── */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:48px;padding:48px 0 64px;align-items:start;}
.article-header{margin-bottom:32px;}
.article-tag{display:inline-block;font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--blue-light);background:var(--blue-pale);padding:4px 10px;border-radius:20px;margin-bottom:14px;}
.article-header h1{font-size:clamp(24px,4vw,38px);font-weight:700;letter-spacing:-.5px;line-height:1.25;color:var(--blue-dark);margin-bottom:14px;}
.article-meta{display:flex;align-items:center;gap:16px;font-size:13px;color:var(--text-muted);flex-wrap:wrap;margin-bottom:24px;}
.article-meta span{display:flex;align-items:center;gap:5px;}
.article-intro{font-size:18px;color:var(--text-muted);line-height:1.7;padding:20px 24px;background:var(--blue-pale);border-left:4px solid var(--blue-light);border-radius:0 var(--radius) var(--radius) 0;margin-bottom:32px;}

/* ── Article body typography ── */
.article-body h2{font-size:24px;font-weight:700;color:var(--blue-dark);margin:40px 0 14px;padding-top:8px;}
.article-body h3{font-size:19px;font-weight:700;color:var(--text-main);margin:28px 0 10px;}
.article-body p{font-size:16px;color:var(--text-muted);line-height:1.8;margin-bottom:18px;}
.article-body ul,.article-body ol{padding-left:24px;margin-bottom:18px;}
.article-body li{font-size:16px;color:var(--text-muted);line-height:1.8;margin-bottom:6px;}
.article-body strong{color:var(--text-main);}
.article-body a{color:var(--blue-light);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--blue-dark);}

/* ── Step boxes ── */
.step-box{display:flex;gap:16px;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:14px;box-shadow:var(--shadow);}
.step-num{flex-shrink:0;width:36px;height:36px;border-radius:50%;background:var(--blue-light);color:#fff;font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;}
.step-content h4{font-size:15px;font-weight:700;color:var(--text-main);margin-bottom:4px;}
.step-content p{font-size:14px;color:var(--text-muted);margin:0;line-height:1.6;}

/* ── Callout box ── */
.callout{border-radius:var(--radius);padding:20px 24px;margin:28px 0;}
.callout.tip{background:var(--teal-pale);border-left:4px solid var(--teal);}
.callout.warning{background:#fff8ed;border-left:4px solid #f59e0b;}
.callout.privacy{background:var(--green-pale);border-left:4px solid var(--green);}
.callout strong{display:block;font-size:13px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;margin-bottom:6px;}
.callout.tip strong{color:var(--teal);}
.callout.warning strong{color:#d97706;}
.callout.privacy strong{color:var(--green);}
.callout p{font-size:15px;color:var(--text-muted);margin:0;line-height:1.6;}

/* ── Comparison table ── */
.compare-table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;}
.compare-table th{background:var(--blue-dark);color:#fff;padding:12px 16px;text-align:left;font-weight:600;}
.compare-table td{padding:12px 16px;border-bottom:1px solid var(--border);}
.compare-table tr:nth-child(even) td{background:var(--bg);}
.compare-table tr:last-child td{border-bottom:none;}
.compare-table .good{color:var(--green);font-weight:700;}
.compare-table .bad{color:#dc2626;font-weight:700;}
.compare-table .ok{color:#f59e0b;font-weight:700;}

/* ── Sidebar ── */
.sidebar{position:sticky;top:80px;}
.sidebar-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px;box-shadow:var(--shadow);}
.sidebar-card h3{font-size:15px;font-weight:700;color:var(--blue-dark);margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border);}
.sidebar-tool{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--border);text-decoration:none;color:var(--text-main);transition:.15s;}
.sidebar-tool:last-child{border-bottom:none;}
.sidebar-tool:hover{color:var(--blue-light);}
.sidebar-tool-icon{width:32px;height:32px;border-radius:8px;background:var(--blue-pale);display:flex;align-items:center;justify-content:center;color:var(--blue-light);font-size:13px;flex-shrink:0;}
.sidebar-tool-name{font-size:13px;font-weight:600;}
.sidebar-cta{background:linear-gradient(135deg,var(--blue-dark),var(--blue-mid));color:#fff;border-radius:var(--radius);padding:20px;text-align:center;}
.sidebar-cta h3{font-size:15px;font-weight:700;margin-bottom:8px;color:#fff;border:none;padding:0;}
.sidebar-cta p{font-size:13px;color:rgba(255,255,255,.8);margin-bottom:14px;}
.sidebar-cta a{display:inline-block;background:#fff;color:var(--blue-dark);padding:10px 20px;border-radius:8px;font-size:13px;font-weight:700;text-decoration:none;transition:.15s;}
.sidebar-cta a:hover{background:#e8f1fd;}

/* ── Related articles ── */
.related-section{padding:48px 0;background:var(--white);border-top:1px solid var(--border);}
.related-section h2{font-size:22px;font-weight:700;color:var(--blue-dark);margin-bottom:24px;}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;}
.related-card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-decoration:none;color:var(--text-main);transition:.15s;}
.related-card:hover{border-color:var(--blue-light);background:var(--blue-pale);}
.related-card-tag{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--blue-light);margin-bottom:8px;}
.related-card-title{font-size:15px;font-weight:700;color:var(--text-main);line-height:1.4;}

/* ── Footer ── */
.site-footer{background:var(--blue-dark);color:rgba(255,255,255,.7);padding:48px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px;}
.footer-brand{font-size:20px;font-weight:700;color:#fff;margin-bottom:10px;}
.footer-text{font-size:14px;line-height:1.6;max-width:220px;}
.footer-heading{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:12px;}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px;}
.footer-links a{color:rgba(255,255,255,.7);text-decoration:none;font-size:13px;transition:color .2s;}
.footer-links a:hover{color:#fff;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 24px;}
.footer-meta{font-size:13px;color:rgba(255,255,255,.45);text-align:center;}

@media(max-width:900px){
  .article-layout{grid-template-columns:1fr;}.sidebar{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-banner{flex-direction:column;text-align:center;}
}
@media(max-width:640px){
  .blog-grid{grid-template-columns:1fr;}.footer-grid{grid-template-columns:1fr;}
  .nav-links{display:none;}.lang-btn span:not(.lc){display:none;}
}