/*
Theme Name:   TechMu
Theme URI:    https://techmu.site/
Description:  A plain-English tech help theme. The homepage builds itself from your published posts and sorts them into three problem-based sections — no categories, no page setup. Includes AdSense slots in the Customizer, a clean article layout, and full responsive support.
Author:       TechMu
Author URI:   https://techmu.site/
Version:      1.0.0
Requires at least: 6.0
Tested up to: 6.8
Requires PHP: 7.4
License:      GNU General Public License v2 or later
License URI:  http://www.gnu.org/licenses/gpl-2.0.html
Text Domain:  techmu
Tags:         blog, news, two-columns, right-sidebar, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready
*/

/* ==================================================================
   TOKENS
   ================================================================== */
:root{
	--ink:#12161c;
	--ink-2:#525f70;
	--ink-3:#7d8a99;
	--paper:#eef1f5;
	--surface:#ffffff;
	--line:#d9e0e8;
	--amber:#b26b00;
	--tint:#12161c;
	--radius:14px;
	--wrap:1180px;
	--display:"Bricolage Grotesque","Segoe UI",system-ui,sans-serif;
	--body:"IBM Plex Sans","Segoe UI",system-ui,sans-serif;
	--mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
}

*,*::before,*::after{box-sizing:border-box;}

body{
	margin:0;
	background:var(--paper);
	color:var(--ink);
	font-family:var(--body);
	font-size:17px;
	line-height:1.65;
	-webkit-font-smoothing:antialiased;
	text-rendering:optimizeLegibility;
}

img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--display);font-weight:800;letter-spacing:-0.025em;line-height:1.1;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;}

.tm-wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;}
.tm-eyebrow{
	font-family:var(--mono);font-size:12px;font-weight:500;
	letter-spacing:0.14em;text-transform:uppercase;color:var(--ink-3);
}
.screen-reader-text{
	position:absolute!important;width:1px;height:1px;overflow:hidden;
	clip:rect(1px,1px,1px,1px);white-space:nowrap;
}
.skip-link{
	position:absolute;left:-9999px;top:0;z-index:999;background:var(--ink);color:#fff;
	padding:12px 18px;border-radius:0 0 8px 0;font-weight:600;
}
.skip-link:focus{left:0;}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;}

/* ==================================================================
   HEADER
   ================================================================== */
.tm-header{
	position:sticky;top:0;z-index:60;background:var(--surface);
	border-bottom:1px solid var(--line);
}
.admin-bar .tm-header{top:32px;}
.tm-header-inner{
	display:flex;align-items:center;justify-content:space-between;gap:20px;
	min-height:68px;
}
.tm-brand{display:flex;align-items:center;gap:9px;font-family:var(--display);font-weight:800;font-size:21px;letter-spacing:-0.03em;}
.tm-brand-dot{width:9px;height:9px;border-radius:50%;background:#C0392B;flex:none;}
.tm-brand-tag{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3);display:block;margin-top:-2px;}
.tm-brand img{max-height:44px;width:auto;}

.tm-nav-list{display:flex;align-items:center;gap:26px;list-style:none;}
.tm-nav-list li{position:relative;}
.tm-nav-list a{font-size:15px;font-weight:500;color:var(--ink-2);padding:6px 0;display:inline-block;}
.tm-nav-list a:hover,.tm-nav-list .current-menu-item > a{color:var(--ink);}
.tm-nav-list .sub-menu{
	display:none;position:absolute;left:0;top:100%;min-width:210px;list-style:none;
	background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:8px;
	box-shadow:0 18px 40px -24px rgba(18,22,28,.5);
}
.tm-nav-list li:hover > .sub-menu,.tm-nav-list li:focus-within > .sub-menu{display:block;}
.tm-nav-list .sub-menu a{display:block;padding:8px 10px;border-radius:6px;}
.tm-nav-list .sub-menu a:hover{background:var(--paper);}

.tm-header-actions{display:flex;align-items:center;gap:12px;}
.tm-search-toggle,.tm-nav-toggle{
	display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
	border:1px solid var(--line);border-radius:9px;background:var(--surface);cursor:pointer;color:var(--ink);
}
.tm-search-toggle:hover,.tm-nav-toggle:hover{border-color:var(--ink);}
.tm-nav-toggle{display:none;}
.tm-icon{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}

.tm-header-search{display:none;padding:0 0 18px;}
.tm-header-search.is-open{display:block;}

/* ==================================================================
   SEARCH FORM
   ================================================================== */
.tm-search{display:flex;gap:8px;max-width:560px;}
.tm-search input[type="search"]{
	flex:1;min-width:0;font-family:var(--body);font-size:16px;padding:14px 16px;
	border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);
}
.tm-search input[type="search"]::placeholder{color:var(--ink-3);}
.tm-search button{
	font-family:var(--body);font-size:15px;font-weight:600;padding:14px 22px;cursor:pointer;
	border:1px solid var(--ink);border-radius:10px;background:var(--ink);color:#fff;white-space:nowrap;
}
.tm-search button:hover{background:#000;}

/* ==================================================================
   HERO
   ================================================================== */
.tm-hero{padding:72px 0 8px;}
.tm-hero h1{font-size:clamp(38px,5.4vw,66px);max-width:17ch;margin:18px 0 0;}
.tm-hero h1 em{font-style:normal;color:var(--ink-3);}
.tm-lede{margin-top:20px;max-width:56ch;font-size:19px;color:var(--ink-2);}
.tm-hero .tm-search{margin-top:26px;max-width:520px;}

.tm-triage{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:52px;}
.tm-triage-card{
	position:relative;display:flex;flex-direction:column;gap:10px;
	background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
	padding:26px 24px 22px;overflow:hidden;
	transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.tm-triage-card::before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:var(--tint);}
.tm-triage-card:hover{transform:translateY(-3px);border-color:var(--tint);box-shadow:0 14px 30px -18px rgba(18,22,28,.45);}
.tm-triage-count{font-family:var(--mono);font-size:13px;font-weight:500;letter-spacing:.1em;text-transform:uppercase;color:var(--tint);}
.tm-triage-card h2{font-size:24px;}
.tm-triage-card p{font-size:15px;color:var(--ink-2);}
.tm-triage-jump{margin-top:auto;padding-top:14px;font-size:14px;font-weight:600;}

/* ==================================================================
   JUST PUBLISHED
   ================================================================== */
.tm-latest{padding:64px 0 0;}
.tm-latest-list{display:grid;grid-template-columns:repeat(3,1fr);margin-top:18px;border-top:1px solid var(--line);}
.tm-latest-item{padding:22px 22px 22px 0;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:8px;}
.tm-latest-item:last-child{border-right:0;}
.tm-latest-item + .tm-latest-item{padding-left:22px;}
.tm-latest-date{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--amber);text-transform:uppercase;}
.tm-latest-item h3{font-size:19px;font-weight:600;}
.tm-latest-item a:hover h3{text-decoration:underline;text-underline-offset:3px;}

/* ==================================================================
   SECTIONS + CARDS
   ================================================================== */
.tm-section{padding:70px 0 0;}
.tm-section-head{
	display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
	gap:16px;padding-bottom:20px;border-bottom:2px solid var(--tint);
}
.tm-section-head h2{font-size:clamp(28px,3.4vw,40px);margin-top:8px;}
.tm-section-head p{max-width:52ch;margin-top:10px;color:var(--ink-2);font-size:16px;}
.tm-section-tag{
	font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
	color:#fff;background:var(--tint);padding:6px 10px;border-radius:999px;white-space:nowrap;
}

.tm-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px;}
.tm-grid--two{grid-template-columns:repeat(2,1fr);}
.tm-card{
	background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
	overflow:hidden;transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;
}
.tm-card:hover{transform:translateY(-3px);border-color:var(--tint);box-shadow:0 16px 34px -22px rgba(18,22,28,.5);}
.tm-card-link{display:flex;flex-direction:column;height:100%;}
.tm-card-media{display:block;aspect-ratio:16/9;overflow:hidden;background:#e6ebf1;}
.tm-card-media img{width:100%;height:100%;object-fit:cover;}
.tm-card-media--blank{display:grid;place-items:center;background:linear-gradient(135deg,#f4f7fa 0%,#e7edf3 100%);border-bottom:1px solid var(--line);}
.tm-card-mark{font-family:var(--display);font-size:64px;font-weight:800;line-height:1;color:var(--tint);opacity:.22;text-transform:uppercase;}
.tm-card-body{display:flex;flex-direction:column;gap:10px;padding:20px 20px 22px;flex:1;}
.tm-meta{display:flex;align-items:center;gap:7px;font-family:var(--mono);font-size:11.5px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-3);}
.tm-dot{width:7px;height:7px;border-radius:50%;background:var(--tint);flex:none;}
.tm-meta-sep{color:var(--line);}
.tm-card-title{font-size:20px;font-weight:600;letter-spacing:-0.015em;line-height:1.25;}
.tm-card-excerpt{font-size:15px;color:var(--ink-2);}
.tm-card-cta{margin-top:auto;padding-top:8px;font-size:14px;font-weight:600;color:var(--tint);}

.tm-empty{background:var(--surface);border:1px dashed var(--line);border-radius:var(--radius);padding:40px 24px;text-align:center;color:var(--ink-2);margin-top:28px;}

/* ==================================================================
   ADS
   ================================================================== */
.tm-ad{margin:56px auto 0;text-align:center;}
.tm-ad-label{font-family:var(--mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-bottom:8px;}
.tm-article .tm-ad{margin:34px auto;}

/* ==================================================================
   CLOSING BLOCK
   ================================================================== */
.tm-close{margin:80px 0 0;padding:44px 0 90px;border-top:1px solid var(--line);}
.tm-close h2{font-size:clamp(24px,3vw,34px);}
.tm-close p{margin-top:12px;color:var(--ink-2);max-width:52ch;}
.tm-btn{display:inline-block;margin-top:22px;padding:14px 26px;border-radius:10px;background:var(--ink);color:#fff;font-weight:600;font-size:15px;}
.tm-btn:hover{background:#000;}

/* ==================================================================
   PAGE HEADS (archive, search, 404)
   ================================================================== */
.tm-pagehead{padding:56px 0 0;}
.tm-pagehead h1{font-size:clamp(30px,4vw,46px);margin-top:10px;}
.tm-pagehead p{margin-top:14px;color:var(--ink-2);max-width:56ch;}
.tm-pagehead .tm-search{margin-top:24px;}

/* ==================================================================
   ARTICLE
   ================================================================== */
.tm-main{padding-bottom:90px;}
.tm-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start;padding-top:44px;}
.tm-article{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:44px 48px 52px;}
.tm-article-head{border-bottom:1px solid var(--line);padding-bottom:26px;margin-bottom:30px;}
.tm-article-head h1{font-size:clamp(30px,3.8vw,44px);margin-top:14px;}
.tm-article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:9px;margin-top:16px;font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);}
.tm-badge{display:inline-flex;align-items:center;gap:7px;background:var(--tint);color:#fff;padding:5px 11px;border-radius:999px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;}
.tm-featured{margin:0 0 30px;border-radius:10px;overflow:hidden;border:1px solid var(--line);}

.tm-content{font-size:17.5px;line-height:1.75;color:#1b222b;}
.tm-content > * + *{margin-top:1.15em;}
.tm-content h2{font-size:29px;margin-top:1.9em;padding-top:.15em;}
.tm-content h3{font-size:22px;margin-top:1.6em;}
.tm-content h4{font-size:18px;margin-top:1.4em;}
.tm-content p{margin-bottom:0;}
.tm-content a{color:#1F6FEB;text-decoration:underline;text-underline-offset:2px;}
.tm-content a:hover{color:#12161c;}
.tm-content ul,.tm-content ol{padding-left:1.3em;}
.tm-content li + li{margin-top:.45em;}
.tm-content ul{list-style:disc;}
.tm-content ol{list-style:decimal;}
.tm-content img{border-radius:10px;}
.tm-content blockquote{
	margin-left:0;margin-right:0;padding:4px 0 4px 22px;border-left:3px solid var(--tint);
	color:var(--ink-2);font-size:19px;
}
.tm-content code{font-family:var(--mono);font-size:.9em;background:var(--paper);padding:2px 6px;border-radius:5px;}
.tm-content pre{background:var(--ink);color:#e7edf3;padding:20px;border-radius:10px;overflow:auto;}
.tm-content pre code{background:none;color:inherit;padding:0;}
.tm-content table{width:100%;border-collapse:collapse;font-size:15.5px;}
.tm-content th,.tm-content td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.tm-content th{background:var(--paper);font-weight:600;}
.tm-content figure{margin:0;}
.tm-content figcaption{font-size:14px;color:var(--ink-3);margin-top:8px;}
.tm-content hr{border:0;border-top:1px solid var(--line);margin:2em 0;}

.tm-article-foot{margin-top:38px;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.tm-tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);border:1px solid var(--line);border-radius:999px;padding:5px 11px;}
.tm-tag:hover{border-color:var(--ink);color:var(--ink);}

.tm-related{margin-top:64px;}
.tm-related h2{font-size:26px;}
.tm-related .tm-grid{margin-top:22px;}

.tm-prevnext{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:40px;}
.tm-prevnext a{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;display:block;}
.tm-prevnext a:hover{border-color:var(--ink);}
.tm-prevnext span{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-3);margin-bottom:7px;}
.tm-prevnext strong{font-family:var(--display);font-size:17px;font-weight:600;letter-spacing:-0.01em;}
.tm-prevnext .tm-next{text-align:right;}

/* ==================================================================
   SIDEBAR
   ================================================================== */
.tm-sidebar{position:sticky;top:96px;display:flex;flex-direction:column;gap:18px;}
.admin-bar .tm-sidebar{top:128px;}
.tm-widget{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;}
.tm-widget-title{font-size:18px;margin-bottom:14px;}
.tm-widget ul{list-style:none;display:flex;flex-direction:column;gap:11px;}
.tm-widget li a{font-size:15.5px;color:var(--ink-2);}
.tm-widget li a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px;}
.tm-sidebar-note{font-size:14.5px;color:var(--ink-2);}
.tm-sidebar-links{display:flex;flex-direction:column;gap:12px;margin-top:14px;}
.tm-sidebar-link{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px;}
.tm-sidebar-link .tm-dot{width:9px;height:9px;}

/* ==================================================================
   PAGINATION
   ================================================================== */
.tm-pagination{margin-top:44px;display:flex;justify-content:center;}
.tm-pagination .page-numbers{
	display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:42px;padding:0 12px;
	margin:0 4px;border:1px solid var(--line);border-radius:9px;background:var(--surface);
	font-size:15px;font-weight:500;color:var(--ink-2);
}
.tm-pagination .page-numbers:hover{border-color:var(--ink);color:var(--ink);}
.tm-pagination .current{background:var(--ink);border-color:var(--ink);color:#fff;}

/* ==================================================================
   COMMENTS
   ================================================================== */
.tm-comments{margin-top:44px;padding-top:30px;border-top:1px solid var(--line);}
.tm-comments h2{font-size:22px;margin-bottom:20px;}
.tm-comments ol{list-style:none;}
.tm-comments .comment-body{background:var(--paper);border-radius:10px;padding:18px 20px;margin-bottom:14px;}
.tm-comments .children{padding-left:26px;}
.tm-comments .comment-meta{font-family:var(--mono);font-size:11.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3);margin-bottom:8px;}
.tm-comments input[type="text"],.tm-comments input[type="email"],.tm-comments input[type="url"],.tm-comments textarea{
	width:100%;font-family:var(--body);font-size:16px;padding:12px 14px;border:1px solid var(--line);
	border-radius:9px;background:var(--surface);color:var(--ink);
}
.tm-comments .submit{
	font-family:var(--body);font-size:15px;font-weight:600;padding:13px 24px;cursor:pointer;
	border:1px solid var(--ink);border-radius:10px;background:var(--ink);color:#fff;
}

/* ==================================================================
   FOOTER
   ================================================================== */
.tm-footer{background:var(--ink);color:#c3ccd6;padding:58px 0 30px;}
.tm-footer a{color:#c3ccd6;}
.tm-footer a:hover{color:#fff;}
.tm-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;}
.tm-footer h2{font-size:20px;color:#fff;}
.tm-footer .tm-eyebrow{color:#7f8b98;}
.tm-footer-about{margin-top:12px;font-size:15px;max-width:42ch;color:#98a4b1;}
.tm-footer-list{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:10px;font-size:15px;}
.tm-footer-bottom{
	margin-top:44px;padding-top:22px;border-top:1px solid #26303b;
	display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
	font-family:var(--mono);font-size:11.5px;letter-spacing:.07em;text-transform:uppercase;color:#7f8b98;
}

/* ==================================================================
   MOTION
   ================================================================== */
.tm-reveal{opacity:0;transform:translateY(14px);}
.tm-reveal.tm-in{opacity:1;transform:none;transition:opacity .5s ease,transform .5s ease;}

/* ==================================================================
   RESPONSIVE
   ================================================================== */
@media (max-width:1020px){
	.tm-layout{grid-template-columns:1fr;gap:34px;}
	.tm-sidebar{position:static;}
	.tm-article{padding:34px 30px 40px;}
}
@media (max-width:980px){
	.tm-nav{
		display:none;position:absolute;left:0;right:0;top:100%;background:var(--surface);
		border-bottom:1px solid var(--line);padding:14px 24px 20px;
		box-shadow:0 20px 40px -28px rgba(18,22,28,.6);
	}
	.tm-nav.is-open{display:block;}
	.tm-nav-list{flex-direction:column;align-items:stretch;gap:2px;}
	.tm-nav-list a{padding:11px 0;font-size:16px;border-bottom:1px solid var(--line);}
	.tm-nav-list .sub-menu{display:block;position:static;border:0;box-shadow:none;padding:0 0 0 14px;}
	.tm-nav-toggle{display:inline-flex;}
	.tm-header-inner{position:relative;}
	.tm-triage,.tm-grid,.tm-grid--two{grid-template-columns:repeat(2,1fr);}
	.tm-latest-list{grid-template-columns:1fr;}
	.tm-latest-item{border-right:0;border-bottom:1px solid var(--line);padding:18px 0;}
	.tm-latest-item + .tm-latest-item{padding-left:0;}
	.tm-latest-item:last-child{border-bottom:0;}
	.tm-footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
	body{font-size:16px;}
	.tm-wrap{padding:0 18px;}
	.tm-hero{padding-top:44px;}
	.tm-triage,.tm-grid,.tm-grid--two,.tm-prevnext{grid-template-columns:1fr;}
	.tm-search{flex-direction:column;}
	.tm-article{padding:26px 20px 34px;border-radius:12px;}
	.tm-content{font-size:16.5px;}
	.tm-content h2{font-size:24px;}
	.tm-footer-grid{grid-template-columns:1fr;gap:28px;}
	.tm-prevnext .tm-next{text-align:left;}
}
@media (prefers-reduced-motion:reduce){
	.tm-reveal{opacity:1;transform:none;}
	.tm-card:hover,.tm-triage-card:hover{transform:none;}
	*{scroll-behavior:auto!important;}
}

/* WordPress core alignment helpers */
.alignleft{float:left;margin:0 1.5em 1em 0;}
.alignright{float:right;margin:0 0 1em 1.5em;}
.aligncenter{margin-left:auto;margin-right:auto;}
.alignwide{max-width:none;}
.wp-caption{max-width:100%;}
.sticky .tm-card-title::after{content:" ★";color:var(--amber);}