/* ISSD Blog article styles — matches site design */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800&display=swap');
*{margin:0;padding:0;box-sizing:border-box;}
:root{--bg:#fff;--bg-soft:#f4f9fb;--bg-alt:#eaf2f5;--text:#15242b;--text-soft:#54666e;--border:#e4ecef;--brand:#0A5C84;--muted:#6b7a89;--card:#fff;--header-bg:rgba(255,255,255,.95);--footer-bg:#081f29;--footer-text:#88a3af;--logo-filter:none;}
html[data-theme="dark"]{--bg:#0a1820;--bg-soft:#0f242e;--bg-alt:#0c1e27;--text:#e8f1f5;--text-soft:#9fb6c0;--border:#1d3540;--brand:#34a0d6;--muted:#7c8e95;--card:#10252f;--header-bg:rgba(10,24,32,.95);--footer-bg:#06121a;--footer-text:#8aa3af;--logo-filter:brightness(0) invert(1);}
body{font-family:'Poppins',sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;}
a{color:var(--brand);text-decoration:none;}
a:hover{text-decoration:underline;}
img{display:block;max-width:100%;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;}

/* Header */
header{background:var(--header-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:20;}
.head-inner{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;gap:20px;flex-wrap:wrap;}
.logo img{height:46px;display:block;filter:var(--logo-filter);}
.contact{text-align:right;font-size:13.5px;color:var(--text-soft);}
.contact a{font-weight:600;}
.breadcrumb{font-size:13px;color:var(--text-soft);padding:13px 24px;border-top:1px solid var(--border);}

/* Page title — dark hero */
.page-title{background:linear-gradient(120deg,#03090f 0%,#051a26 58%,#062b3a 120%);color:#fff;padding:52px 0 52px;position:relative;overflow:hidden;}
.page-title::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(95,224,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(95,224,255,.05) 1px,transparent 1px);background-size:50px 50px;opacity:.7;}
.page-title::after{content:"";position:absolute;top:-45%;right:-6%;width:540px;height:540px;background:radial-gradient(circle,rgba(52,160,214,.20),transparent 68%);pointer-events:none;}
.page-title .wrap{position:relative;max-width:820px;}
.page-title .wrap::before{content:"ISSD BLOG";display:block;font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:#7fd4a3;margin-bottom:18px;}
.page-title h1{font-family:'Poppins',sans-serif;font-size:clamp(26px,3.4vw,36px);line-height:1.16;font-weight:700;letter-spacing:-.02em;max-width:760px;text-wrap:balance;}
.page-title .meta{display:flex;flex-wrap:wrap;gap:10px 12px;font-size:12.5px;color:#9fc6d6;margin-top:22px;align-items:center;}
.page-title .meta .cat{display:inline-flex;align-items:center;color:#7fd4a3;font-weight:700;text-transform:uppercase;letter-spacing:.07em;font-size:11.5px;border:1px solid rgba(127,212,163,.4);background:rgba(127,212,163,.1);padding:5px 12px;border-radius:100px;}
.page-title .meta > span:not(.cat) + span:not(.cat)::before{content:"·";margin-right:12px;color:#5c7d8b;}

/* Article body */
article{max-width:680px;margin:0 auto;padding:40px 0 24px;}
article figure{margin:0 0 26px;border-radius:14px;overflow:hidden;border:1px solid var(--border);background:var(--bg-alt);}
article figure img{width:100%;height:auto;display:block;}
article figcaption{font-size:12.5px;color:var(--muted);padding:10px 16px;border-top:1px solid var(--border);background:var(--bg-soft);}
article p{font-size:15.5px;line-height:1.75;color:var(--text-soft);margin-bottom:18px;}
article p strong{color:var(--text);font-weight:600;}
article > p:first-of-type{font-size:17px;line-height:1.7;color:var(--text);}
article h2{font-family:'Poppins',sans-serif;font-size:21px;font-weight:700;letter-spacing:-.01em;color:var(--text);margin:34px 0 12px;line-height:1.3;padding-top:14px;border-top:1px solid var(--border);}
article h3{font-family:'Poppins',sans-serif;font-size:16.5px;font-weight:700;color:var(--text);margin:26px 0 10px;}
article ul,article ol{margin:0 0 18px 20px;color:var(--text-soft);font-size:15px;line-height:1.75;}
article li{margin-bottom:6px;}
article img{border-radius:12px;margin:8px 0 22px;}
article blockquote{border-left:3px solid var(--brand);padding:6px 0 6px 18px;margin:0 0 20px;color:var(--text);font-style:italic;font-size:15.5px;}
.refs{margin-top:36px;padding-top:20px;border-top:1px solid var(--border);}
.refs h3{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:12px;}
.refs p{font-size:12.5px;line-height:1.6;color:var(--muted);margin-bottom:9px;}

/* Tables */
article table{width:100%;border-collapse:collapse;margin:8px 0 30px;font-size:14.5px;background:var(--card);border:1px solid var(--border);border-radius:12px;overflow:hidden;}
article table caption{caption-side:top;text-align:left;font-family:'Poppins',sans-serif;font-size:14px;font-weight:700;color:var(--brand);margin-bottom:10px;letter-spacing:.01em;}
article thead th,article table tr:first-child th{background:var(--bg-alt);}
article th{text-align:left;font-family:'Poppins',sans-serif;font-weight:700;color:var(--text);padding:12px 16px;border-bottom:1px solid var(--border);vertical-align:top;line-height:1.45;}
article td{padding:11px 16px;border-bottom:1px solid var(--border);color:var(--text-soft);vertical-align:top;line-height:1.5;}
article tbody tr:last-child td,article table tr:last-child td{border-bottom:none;}
article tr:nth-child(even) td{background:color-mix(in oklab,var(--bg-soft) 55%,transparent);}
article table a{font-weight:600;}
article table + p,article figure + p{margin-top:0;}
@media (max-width:640px){
  article table{font-size:13px;display:block;overflow-x:auto;white-space:nowrap;}
  article th,article td{white-space:normal;min-width:120px;}
}

/* Author box */
.author{background:var(--bg-soft);border:1px solid var(--border);border-left:3px solid var(--brand);border-radius:14px;padding:22px 24px;margin:34px 0 8px;font-size:15px;line-height:1.7;color:var(--text-soft);}
.author strong{font-family:'Poppins',sans-serif;font-size:16px;color:var(--text);}

/* Back link */
.backlink{max-width:760px;margin:0 auto;padding:12px 24px 60px;}
.backlink a{display:inline-block;border:1px solid var(--border);border-radius:100px;padding:11px 22px;font-weight:700;font-size:14px;color:var(--text);}
.backlink a:hover{border-color:var(--brand);color:var(--brand);text-decoration:none;}

/* Footer */
footer{background:var(--footer-bg);color:var(--footer-text);font-size:13.5px;padding:28px 0;text-align:center;border-top:1px solid var(--border);}
footer a{color:#fff;}

@media (max-width:640px){
  .page-title h1{font-size:24px;}
  article{padding:30px 0 16px;}
  article p{font-size:15px;}
  article > p:first-of-type{font-size:16px;}
}


/*resp-v1*/
@media (max-width:980px){
  [style*="grid-template-columns: repeat(4"],[style*="grid-template-columns:repeat(4"],
  [style*="grid-template-columns: repeat(3"],[style*="grid-template-columns:repeat(3"]{grid-template-columns:repeat(2,1fr)!important;}
}
@media (max-width:760px){
  [style*="grid-template-columns"]{grid-template-columns:1fr!important;}
  header nav{overflow-x:auto!important;-webkit-overflow-scrolling:touch;max-width:100%!important;}
  header nav a,header nav button{white-space:nowrap;}
  [style*="padding:78px"],[style*="padding: 78px"],[style*="padding:84px"],[style*="padding:76px"],[style*="padding:74px"]{padding-left:20px!important;padding-right:20px!important;}
}
@media (max-width:600px){
  h1{font-size:clamp(28px,9vw,40px)!important;line-height:1.1!important;}
  h2{font-size:clamp(22px,6.5vw,30px)!important;}
}


/* ===== Site header (real menu) ===== */
:root{--brand-deep:#0b3140;}
html[data-theme="dark"]{--brand-deep:#0b3140;}
.sh-top{position:sticky;top:0;z-index:40;}
.sh-util{background:var(--brand-deep);color:#cfe0e8;font-size:12.5px;font-weight:500;letter-spacing:.02em;}
.sh-uwrap{max-width:1280px;margin:0 auto;padding:0 24px;height:38px;display:flex;align-items:center;justify-content:space-between;gap:16px;}
.sh-util .l,.sh-util .r{display:flex;align-items:center;gap:16px;}
.sh-util a{color:inherit;text-decoration:none;}
.sh-util .sep{opacity:.35;}
.sh-util .socials{display:flex;align-items:center;gap:11px;}
.sh-util .socials a{display:inline-flex;opacity:.8;}
.sh-util .socials a:hover{opacity:1;text-decoration:none;}
.sh-lang{display:flex;align-items:center;gap:8px;font-weight:600;}
.sh-lang .on{color:#fff;}
.sh-lang a{opacity:.55;}
.sh-lang a:hover{opacity:1;}

header.sh{background:var(--header-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:relative;}
.sh-main{max-width:1280px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px;}
.sh-logo{flex-shrink:0;display:flex;align-items:center;}
.sh-logo img{height:34px;width:auto;display:block;filter:var(--logo-filter);}
.sh-nav{display:flex;align-items:center;height:72px;}
.sh-nav > a,.sh-drop > button{font-family:inherit;font-size:15px;font-weight:600;color:var(--text);padding:0 13px;height:72px;display:flex;align-items:center;gap:6px;background:none;border:none;cursor:pointer;white-space:nowrap;text-decoration:none;position:relative;}
.sh-nav > a::after,.sh-drop > button::after{content:'';position:absolute;left:13px;right:13px;bottom:22px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .22s ease;}
.sh-nav > a:hover::after,.sh-drop:hover > button::after{transform:scaleX(1);}
.sh-nav > a:hover,.sh-drop > button:hover{text-decoration:none;}
.sh-home{color:var(--text);}
.sh-caret{font-size:9px;opacity:.55;}
.sh-drop{position:relative;height:72px;display:flex;align-items:center;}
.sh-panel{position:absolute;top:72px;left:0;background:var(--card);border:1px solid var(--border);border-top:none;box-shadow:0 24px 48px -24px rgba(0,0,0,.4);min-width:320px;padding:12px;display:none;flex-direction:column;gap:2px;border-radius:0 0 12px 12px;}
.sh-drop:hover .sh-panel{display:flex;}
.sh-panel a{display:flex;flex-direction:column;gap:2px;padding:9px 10px;border-radius:6px;text-decoration:none;}
.sh-panel a:hover{background:var(--bg-soft);text-decoration:none;}
.sh-panel .t{font-weight:700;font-size:14px;color:var(--brand);line-height:1.3;}
.sh-panel .d{font-size:12.5px;color:var(--text-soft);line-height:1.4;}
.sh-right{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.sh-theme{width:40px;height:40px;border-radius:8px;border:1px solid var(--border);background:var(--bg-soft);color:var(--text);cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;}
.sh-theme:hover{border-color:var(--brand);}
.sh-hb{display:none;width:42px;height:42px;border-radius:8px;border:1px solid var(--border);background:var(--bg-soft);color:var(--text);cursor:pointer;align-items:center;justify-content:center;}
.sh-mobile{display:none;border-top:1px solid var(--border);background:var(--card);max-height:calc(100vh - 110px);overflow-y:auto;}
.sh-mobile.open{display:block;}
.sh-mobile a{display:block;padding:12px 24px;font-size:15px;font-weight:600;color:var(--text);border-bottom:1px solid var(--border);text-decoration:none;}
.sh-mobile a:hover{color:var(--brand);text-decoration:none;}
.sh-mgrp{font-size:11px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);padding:16px 24px 6px;}
/* desktop nav does not fit below ~990px: switch to hamburger at 1080px */
@media (max-width:1080px){
  .sh-nav{display:none;}
  .sh-hb{display:flex;}
}
@media (max-width:860px){
  .sh-util .sh-tag{display:none;}
  .sh-uwrap{padding:0 16px;}
  .sh-main{padding:0 16px;}
}
@media (max-width:560px){
  .sh-util .socials{display:none;}
  /* util bar could not fit in 38px on narrow screens and wrapped: hide it */
  .sh-util{display:none;}
  .sh-mobile{max-height:calc(100vh - 72px);}
}