/*
Theme Name: TechPathHub Lines
Theme URI: https://techpathhub.com
Author: TechPathHub
Description: A fast, no-sidebar theme for an IT certification and cybersecurity learning blog. The site works like a transit map: each category is a coloured line and each guide is a stop. No jQuery, no web fonts, no page builder, no sliders.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: techpathhub-lines
*/

/* ---------- Tokens ---------- */
:root{
  --bg:#ffffff; --paper:#f4f6fb; --card:#ffffff;
  --text:#1c2033; --muted:#596079; --line:#e1e5ef;
  --blue:#2457d6; --red:#c8283c; --green:#14804a;
  --link:#2457d6; --lc:var(--blue);
  --btn-bg:#1c2033; --btn-fg:#ffffff; --btn-hv:#2457d6;
  --focus:#2457d6; --radius:10px;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1120px; --prose:700px;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#101322; --paper:#161a30; --card:#1b2040;
    --text:#e7eaf6; --muted:#a3aac6; --line:#2b3258;
    --blue:#7aa2ff; --red:#ff8a98; --green:#4ade80;
    --link:#8fb0ff; --btn-bg:#e7ecff; --btn-fg:#12152a; --btn-hv:#ffffff; --focus:#fbbf24;
  }
}
.line-blue{--lc:var(--blue)}
.line-red{--lc:var(--red)}
.line-green{--lc:var(--green)}

/* ---------- Base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:400 1rem/1.65 var(--sans);overflow-wrap:break-word;-webkit-font-smoothing:antialiased}
img,svg,video,iframe{max-width:100%;height:auto}
img{display:block}
a{color:var(--link);text-underline-offset:3px}
a:hover{text-decoration-thickness:2px}
h1,h2,h3,h4{line-height:1.15;color:var(--text);margin:0 0 .5em;letter-spacing:-.02em}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:3px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--btn-bg);color:var(--btn-fg);padding:10px 16px;font-weight:700;z-index:100;border-radius:6px}
.skip:focus{left:8px}
.screen-reader-text{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-inline:clamp(16px,4vw,32px)}
.wrap-narrow{width:100%;max-width:calc(var(--prose) + 2 * clamp(16px,4vw,32px));margin:0 auto;padding-inline:clamp(16px,4vw,32px)}
.stripe,.site-header::before,.site-footer::before{content:"";display:block;height:5px;background:linear-gradient(90deg,var(--blue) 33.34%,var(--red) 33.34% 66.67%,var(--green) 66.67%)}

/* ---------- Header ---------- */
.site-header{background:var(--bg);border-bottom:1px solid var(--line);position:relative;z-index:20}
.head-row{display:flex;align-items:center;gap:16px;min-height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-weight:800;font-size:1.2rem;letter-spacing:-.03em}
.mark .b{fill:var(--blue)} .mark .r{fill:var(--red)} .mark .g{fill:var(--green)}
.brand-logo{height:36px;width:auto}
.site-nav{margin-left:auto}
.head-right{display:flex;align-items:center;gap:4px}
.menu{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px}
.menu li{position:relative}
.menu a{display:inline-flex;align-items:center;min-height:44px;padding:0 12px;color:var(--text);text-decoration:none;font-size:.95rem;font-weight:600;border-radius:6px}
.menu a:hover{background:var(--paper)}
.menu .current-menu-item>a,.menu .current-menu-ancestor>a,.menu a[aria-current="page"]{box-shadow:inset 0 -3px 0 var(--text);border-radius:0}
.menu .sub-menu{display:none;position:absolute;top:100%;left:0;min-width:200px;margin:0;padding:6px;list-style:none;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.menu li:hover>.sub-menu,.menu li:focus-within>.sub-menu{display:block}
.nav-toggle{display:none;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid var(--line);background:var(--bg);color:var(--text);border-radius:6px;cursor:pointer}
.search-d{position:relative}
.search-d summary{list-style:none;display:grid;place-items:center;width:44px;height:44px;cursor:pointer;border-radius:6px;color:var(--text)}
.search-d summary::-webkit-details-marker{display:none}
.search-d summary:hover{background:var(--paper)}
.search-panel{position:absolute;right:0;top:calc(100% + 8px);width:min(92vw,360px);padding:12px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);z-index:30}
.search-form{display:flex;gap:8px}
.search-form input[type=search]{flex:1;min-width:0;min-height:44px;padding:0 12px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--text);font:inherit}
.btn,.search-form button,.comment-form input[type=submit]{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border:2px solid var(--btn-bg);border-radius:6px;background:var(--btn-bg);color:var(--btn-fg);font:inherit;font-weight:700;text-decoration:none;cursor:pointer;transition:background-color .15s,border-color .15s}
.btn:hover,.search-form button:hover,.comment-form input[type=submit]:hover{background:var(--btn-hv);border-color:var(--btn-hv);color:#fff}
.btn-ghost{background:transparent;color:var(--text)}
.btn-ghost:hover{background:var(--text);border-color:var(--text);color:var(--bg)}
.btns{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- Home: hero + route map ---------- */
.hero{background:var(--paper);border-bottom:1px solid var(--line);padding:clamp(36px,6vw,80px) 0 clamp(8px,2vw,24px)}
.hero h1{font-size:clamp(2.4rem,6.4vw,4.3rem);font-weight:800;letter-spacing:-.04em;line-height:1.02;max-width:14ch;margin-bottom:.4em}
.lead{font-size:clamp(1.05rem,2vw,1.25rem);color:var(--muted);max-width:56ch;margin-bottom:1.5em}
.map{margin-top:clamp(28px,5vw,52px);border-top:1px solid var(--line)}
.lane{display:grid;gap:14px 32px;padding:24px 0;border-bottom:1px solid var(--line)}
.lane:last-child{border-bottom:0}
.lane-h{font-size:1.2rem;margin:0}
.lane-h a{color:var(--text);text-decoration:none}
.lane-h a:hover{color:var(--lc);text-decoration:underline}
.lane-sub{margin:2px 0 0;font-size:.92rem;color:var(--muted)}
.lane-count{margin:8px 0 0;font-size:.85rem;font-weight:700;color:var(--lc)}
.stations{list-style:none;margin:0;padding:0;display:flex}
.stations li{position:relative;flex:1 1 0;min-width:0;padding:30px 8px 0 0;font-weight:600;font-size:.92rem;overflow-wrap:anywhere}
.stations li::before{content:"";position:absolute;left:0;top:0;width:24px;height:24px;border:5px solid var(--lc);border-radius:50%;background:var(--bg)}
.stations li:last-child::before{background:var(--lc)}
.stations li:not(:last-child)::after{content:"";position:absolute;left:24px;right:0;top:9px;height:6px;background:var(--lc)}
@media (min-width:900px){.lane{grid-template-columns:250px 1fr;align-items:center}}
@media (max-width:639px){
  .stations{flex-direction:column}
  .stations li{flex:none;padding:0 0 18px 40px;min-height:24px}
  .stations li:last-child{padding-bottom:0}
  .stations li:not(:last-child)::after{left:9px;right:auto;top:24px;bottom:0;width:6px;height:auto}
}

/* ---------- Sections ---------- */
.sec{padding:clamp(40px,6vw,72px) 0}
.sec-head{margin-bottom:28px}
.sec-head h2{font-size:clamp(1.6rem,3.4vw,2.2rem);margin:0 0 6px}
.sec-head p{margin:0;color:var(--muted);max-width:60ch}
.proof{display:grid;gap:28px 48px;padding:clamp(24px,4vw,40px);background:var(--paper);border:1px solid var(--line);border-radius:var(--radius)}
@media (min-width:860px){.proof{grid-template-columns:minmax(0,5fr) minmax(0,7fr)}}
.proof h2{font-size:clamp(1.5rem,3vw,2rem)}
.proof>div>p{color:var(--muted)}
.checks{list-style:none;margin:0;padding:0;display:grid;gap:16px}
.checks li{display:grid;grid-template-columns:28px 1fr;gap:12px}
.checks svg{color:var(--green);margin-top:2px}
.checks strong{display:block}
.checks span{color:var(--muted);font-size:.95rem}
.empty{padding:28px;border:2px dashed var(--line);border-radius:var(--radius)}
.empty h3{font-size:1.2rem}
.empty p{color:var(--muted);max-width:60ch}

/* ---------- Route list (timeline of guides) ---------- */
.route{list-style:none;margin:0;padding:0 0 0 44px}
.stop{position:relative;padding:0 0 30px;--lc:var(--blue)}
.stop::before{content:"";position:absolute;left:-31px;top:28px;bottom:-4px;width:6px;background:var(--lc)}
.stop::after{content:"";position:absolute;left:-40px;top:3px;width:24px;height:24px;border:5px solid var(--lc);border-radius:50%;background:var(--bg)}
.stop:last-child::before{display:none}
.stop:last-child{padding-bottom:0}
.stop-title{font-size:clamp(1.2rem,2.4vw,1.45rem);margin:0 0 4px}
.stop-title a{color:var(--text);text-decoration:none}
.stop-title a:hover{color:var(--lc);text-decoration:underline}
.stop-meta{display:flex;flex-wrap:wrap;gap:2px 14px;margin:0 0 6px;color:var(--muted);font-size:.86rem}
.stop-meta a{color:var(--lc);font-weight:700;text-decoration:none}
.stop-meta a:hover{text-decoration:underline}
.stop-ex{margin:0;color:var(--muted);max-width:68ch}
.route-wrap{max-width:860px}

/* ---------- Archive / page heads ---------- */
.page-head{padding:clamp(28px,5vw,56px) 0 8px}
.archive-head{border-top:8px solid var(--lc);padding-top:clamp(24px,4vw,40px)}
.page-head h1{font-size:clamp(2rem,4.6vw,3rem);font-weight:800;letter-spacing:-.035em;margin-bottom:.3em}
.page-head .desc{color:var(--muted);font-size:1.1rem;max-width:64ch}
.crumbs{font-size:.88rem;color:var(--muted);margin-bottom:16px}
.crumbs ol,.crumbs .rank-math-breadcrumb p{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px 8px}
.crumbs li+li::before{content:"/";margin-right:8px}
.crumbs a{color:var(--muted)}
.list-wrap{padding:28px 0 72px}
.pagination,.nav-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:40px}
.pagination .nav-links{margin-top:0}
.page-numbers{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:6px;text-decoration:none;color:var(--text);font-weight:600}
.page-numbers.current{background:var(--btn-bg);border-color:var(--btn-bg);color:var(--btn-fg)}

/* ---------- Single ---------- */
.progress{display:none}
@supports (animation-timeline:scroll()){
  .progress{display:block;position:fixed;top:0;left:0;width:100%;height:5px;background:var(--lc);transform:scaleX(0);transform-origin:0 50%;animation:tph-grow auto linear;animation-timeline:scroll(root);z-index:60}
  @keyframes tph-grow{to{transform:scaleX(1)}}
}
.post-head{padding-top:clamp(28px,5vw,56px)}
.chip{display:inline-block;margin-bottom:14px;padding:3px 12px;border:2px solid var(--lc);border-radius:99px;color:var(--lc);font-size:.85rem;font-weight:700;text-decoration:none}
.post-head h1{font-size:clamp(2rem,4.8vw,3.1rem);font-weight:800;letter-spacing:-.035em;line-height:1.08}
.post-meta{display:flex;flex-wrap:wrap;gap:4px 18px;color:var(--muted);font-size:.92rem;margin:0 0 28px}
.post-hero{margin:0 auto 32px}
.post-hero img{width:100%;border-radius:var(--radius);aspect-ratio:1200/630;object-fit:cover}
.prose{font-size:1.125rem;line-height:1.75}
.prose>*{max-width:var(--prose)}
.prose h2{font-size:1.7rem;margin-top:2.2em;scroll-margin-top:16px;padding-top:.6em;border-top:3px solid var(--lc)}
.prose h3{font-size:1.3rem;margin-top:1.8em;scroll-margin-top:16px}
.prose ul,.prose ol{padding-left:1.4em;margin:0 0 1.2em}
.prose li{margin-bottom:.4em}
.prose img{border-radius:6px;margin:1.5em 0}
.prose figure{margin:1.5em 0}
.prose figcaption{font-size:.88rem;color:var(--muted);margin-top:6px}
.prose blockquote{margin:1.6em 0;padding:4px 0 4px 18px;border-left:5px solid var(--lc);color:var(--muted)}
.prose code{font:.88em var(--mono);background:var(--paper);border:1px solid var(--line);padding:1px 6px;border-radius:4px}
.prose pre{background:#161a30;color:#e7eaf6;padding:16px;border-radius:var(--radius);overflow-x:auto;font:.9rem/1.6 var(--mono);max-width:100%}
.prose pre code{background:none;border:0;padding:0;color:inherit}
.prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;margin:1.5em 0;font-size:.95rem}
.prose th,.prose td{padding:10px 12px;border:1px solid var(--line);text-align:left}
.prose th{background:var(--paper)}
.prose .alignwide,.prose .alignfull{max-width:100%}
.post-note{margin:40px 0 0;padding:14px 16px;border:1px solid var(--line);border-radius:6px;background:var(--paper);color:var(--muted);font-size:.9rem}
.author{display:flex;gap:16px;align-items:flex-start;margin:28px 0 0;padding:20px;border:1px solid var(--line);border-radius:var(--radius)}
.author img{border-radius:50%;flex:none}
.author-name{font-weight:800;margin:0 0 4px}
.author p{margin:0;color:var(--muted);font-size:.95rem}
.related{margin-top:56px;padding:48px 0 64px;background:var(--paper);border-top:1px solid var(--line)}
.related h2{font-size:1.6rem;margin-bottom:28px}

/* ---------- Comments ---------- */
.comments{margin-top:48px}
.comment-list{list-style:none;padding:0}
.comment-list .comment{padding:16px 0;border-top:1px solid var(--line)}
.comment-form input[type=text],.comment-form input[type=email],.comment-form input[type=url],.comment-form textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--text);font:inherit}

/* ---------- Ads (off unless enabled in Customizer) ---------- */
.ad-slot{margin:32px auto;max-width:var(--wrap);padding-inline:clamp(16px,4vw,32px);min-height:280px;text-align:center}
.ad-label{display:block;font-size:.72rem;color:var(--muted);margin-bottom:6px}

/* ---------- Footer (light) ---------- */
.site-footer{background:var(--paper);color:var(--muted);margin-top:0}
.site-footer .wrap:first-of-type{padding-top:48px}
.foot-grid{display:grid;gap:36px;grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr))}
.foot-brand{color:var(--text);font-weight:800;font-size:1.2rem;margin-bottom:8px}
.foot-text{max-width:42ch;margin:0}
.foot-h{color:var(--text);font-weight:700;margin-bottom:8px}
.site-footer .menu{flex-direction:column;gap:0}
.site-footer .menu a{color:var(--muted);padding:0;min-height:36px;font-weight:500;border-radius:0;box-shadow:none}
.site-footer .menu a:hover{color:var(--text);background:none;text-decoration:underline}
.foot-base{margin-top:36px;padding-top:20px;padding-bottom:28px;border-top:1px solid var(--line);font-size:.86rem}
.foot-base p{margin:0 0 6px;max-width:90ch}

/* ---------- 404 / search ---------- */
.center-box{padding:clamp(48px,9vw,110px) 0;text-align:center}
.center-box .search-form{max-width:440px;margin:24px auto}
.center-box .btns{justify-content:center}

/* ---------- Responsive ---------- */
@media (max-width:820px){
  .js .nav-toggle{display:inline-flex}
  .js .site-nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--line);padding:8px clamp(16px,4vw,32px) 16px;margin:0}
  .js .site-nav.open{display:block}
  .head-row{flex-wrap:wrap}
  .head-right{margin-left:auto}
  .site-nav{order:3;width:100%;margin-left:0}
  .menu{flex-direction:column}
  .menu a{width:100%;min-height:48px}
  .menu .sub-menu{display:block;position:static;border:0;padding:0 0 0 14px}
}
@media (max-width:520px){.btns .btn{width:100%}.author{flex-direction:column}}

/* ---------- Motion / print ---------- */
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}.progress{display:none!important}}
@media print{.site-header,.site-footer,.related,.ad-slot,.search-d,.nav-toggle,.progress{display:none}body{color:#000;background:#fff}a{color:#000}}