/*
Theme Name: EduPlix
Theme URI: https://eduplix.com
Author: EduPlix
Description: Custom theme for EduPlix (programming interview questions, tutorials, current affairs). Three-column blog layout: Google Ads rail on the left, content in the centre, Google Ads rail on the right, plus a Google Ads banner above the heading. Configure ads under Appearance > Customize > Google Ads.
Version: 1.0.0
Requires at least: 6.0
Requires PHP: 7.4
License: GPL-2.0-or-later
Text Domain: eduplix
*/

:root{
  --ink:#0f1b2d; --ink-2:#47566b; --ink-3:#7a889b;
  --paper:#f4f7fa; --card:#ffffff; --line:#e0e7ef;
  --brand:#0b6e66; --brand-dark:#07504a; --brand-tint:#e3f3f1;
  --accent:#ffc83d; --accent-dark:#e0a800;
  --radius:10px; --rail:160px; --gap:28px;
  --font-head:"Space Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:"Source Serif 4",Georgia,"Times New Roman",serif;
  --font-ui:"Space Grotesk",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--brand-dark)}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);line-height:1.2;color:var(--ink);margin:1.6em 0 .6em;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4vw,2.8rem);margin-top:0}
h2{font-size:clamp(1.45rem,2.6vw,1.9rem)}
h3{font-size:1.3rem}
p{margin:0 0 1.2em}
.screen-reader-text{position:absolute!important;clip:rect(1px,1px,1px,1px);width:1px;height:1px;overflow:hidden}
.skip-link:focus{clip:auto;width:auto;height:auto;background:var(--accent);color:var(--ink);padding:10px 16px;top:8px;left:8px;z-index:1000;font-family:var(--font-ui)}
.wrap{width:min(1360px,100% - 40px);margin-inline:auto}
.btn{display:inline-block;font-family:var(--font-ui);font-weight:600;font-size:.95rem;background:var(--accent);color:var(--ink);padding:.7em 1.3em;border-radius:8px;text-decoration:none;border:0;cursor:pointer;transition:background .15s}
.btn:hover{background:var(--accent-dark);color:var(--ink)}
.btn--ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.5)}
.btn--ghost:hover{background:rgba(255,255,255,.12);color:#fff}

/* Header */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;gap:24px;min-height:72px}
.site-branding img{height:44px;width:auto}
.site-title{font-family:var(--font-head);font-weight:700;font-size:1.5rem;color:var(--ink);text-decoration:none}
.main-nav{margin-left:auto}
.main-nav ul{list-style:none;margin:0;padding:0;display:flex;align-items:center;gap:6px}
.main-nav a{display:block;font-family:var(--font-ui);font-weight:500;font-size:.98rem;color:var(--ink);text-decoration:none;padding:.5em .9em;border-radius:8px}
.main-nav a:hover,.main-nav .current-menu-item>a{background:var(--brand-tint);color:var(--brand-dark)}
.main-nav .menu-cta>a{background:var(--accent);font-weight:700}
.main-nav .menu-cta>a:hover{background:var(--accent-dark)}
.nav-tools{display:flex;gap:8px}
.icon-btn{background:none;border:1px solid var(--line);border-radius:8px;height:42px;min-width:42px;padding:0 12px;font-family:var(--font-ui);font-weight:600;color:var(--ink);cursor:pointer}
.icon-btn:hover{background:var(--brand-tint)}
.menu-toggle{display:none}
.header-search{display:none;border-top:1px solid var(--line);background:#fff;padding:14px 0}
.header-search.is-open{display:block}

/* Search form */
.search-form{display:flex;gap:8px;max-width:640px}
.search-form input[type=search]{flex:1;min-width:0;font:inherit;font-family:var(--font-ui);padding:.75em 1em;border:1px solid var(--line);border-radius:8px;background:#fff}
.search-form button{font-family:var(--font-ui);font-weight:600;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:0 1.3em;cursor:pointer}
.search-form button:hover{background:var(--brand-dark)}

/* Hero */
.hero{background:var(--ink);color:#fff;padding:72px 0 80px;position:relative;overflow:hidden}
.hero::after{content:"{ }";position:absolute;right:-20px;bottom:-70px;font-family:var(--font-head);font-weight:700;font-size:22rem;line-height:1;color:rgba(255,255,255,.035);pointer-events:none}
.hero .wrap{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;align-items:center;position:relative;z-index:1}
.hero h1{color:#fff;font-size:clamp(2.2rem,5vw,3.6rem)}
.hero p.lead{font-size:1.2rem;color:#c5d0de;max-width:34em}
.hero .search-form{margin:28px 0 22px}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}
.chips a{display:inline-block;font-family:var(--font-ui);font-size:.88rem;padding:.35em .9em;border-radius:99px;background:rgba(255,255,255,.1);color:#fff;text-decoration:none}
.chips a:hover{background:var(--accent);color:var(--ink)}

/* Promo (Vyapar) */
.promo{background:#fff;color:var(--ink);border-radius:14px;padding:24px;display:grid;gap:14px;box-shadow:0 20px 40px -20px rgba(0,0,0,.45)}
.promo h3{margin:0;font-size:1.25rem}
.promo__img{border-radius:8px;border:1px solid var(--line);width:100%;background:var(--paper)}
.promo p{font-size:.98rem;line-height:1.55;margin:0;color:var(--ink-2)}
.promo--inline{grid-template-columns:200px 1fr;align-items:start;margin:2.4em 0;box-shadow:none;border:1px solid var(--line)}
.promo--inline .promo__body{display:grid;gap:10px}
.promo--footer{background:rgba(255,255,255,.06);color:#fff;box-shadow:none}
.promo--footer h3,.promo--footer p{color:#fff}
.promo--footer p{opacity:.8}

/* Sections */
.section{padding:64px 0}
.section__head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:28px}
.section__head h2{margin:0}
.section__head a{font-family:var(--font-ui);font-weight:600;text-decoration:none}

/* Cards */
.grid{display:grid;gap:24px;grid-template-columns:repeat(3,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.card__thumb{aspect-ratio:16/9;background:var(--brand-tint);display:block;overflow:hidden}
.card__thumb img{width:100%;height:100%;object-fit:cover}
.card__thumb--fallback img{object-fit:contain;padding:22px 34px}
.card__body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card__title{font-size:1.2rem;margin:0}
.card__title a{color:var(--ink);text-decoration:none}
.card__title a:hover{color:var(--brand)}
.card__excerpt{font-size:.98rem;color:var(--ink-2);margin:0;line-height:1.55}
.meta{font-family:var(--font-ui);font-size:.82rem;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:4px 14px}
.meta a{color:var(--brand);text-decoration:none;font-weight:600}

/* Category tiles + topic list */
.tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;list-style:none;margin:0;padding:0}
.tiles a{display:flex;justify-content:space-between;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:8px;padding:14px 16px;font-family:var(--font-ui);font-weight:600;color:var(--ink);text-decoration:none}
.tiles a:hover{border-left-color:var(--accent);background:var(--brand-tint)}
.tiles span{font-weight:500;font-size:.85rem;color:var(--ink-3)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.link-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.link-list a{display:block;background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px 16px;font-family:var(--font-ui);font-weight:500;color:var(--ink);text-decoration:none}
.link-list a:hover{border-color:var(--brand);color:var(--brand)}
.band{background:#fff;border-block:1px solid var(--line)}

/* ===== Three-column blog layout: ads | content | ads ===== */
.layout{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--gap);padding:36px 0 64px}
.layout__main{min-width:0}
.ad-rail{display:none}
@media (min-width:1200px){
  .layout.has-ads{grid-template-columns:var(--rail) minmax(0,1fr) var(--rail)}
  .layout.has-ads .ad-rail{display:block}
  .ad-rail__sticky{position:sticky;top:96px}
}
.ad{text-align:center;overflow:hidden;font-family:var(--font-ui)}
.ad--top{margin:0 0 28px;min-height:90px}
.ad--rail{width:var(--rail);min-height:600px}
.ad-label{display:block;font-size:.68rem;color:var(--ink-3);margin-bottom:4px;letter-spacing:.04em}
.ad-placeholder{display:flex;align-items:center;justify-content:center;background:repeating-linear-gradient(45deg,#fff7dc,#fff7dc 10px,#fff1c2 10px,#fff1c2 20px);border:2px dashed var(--accent-dark);color:#7a5b00;font-weight:600;font-size:.85rem;padding:10px;text-align:center}
.ad--top .ad-placeholder{height:90px}
.ad--rail .ad-placeholder{height:600px}

/* Blog list */
.page-title{margin-bottom:.3em}
.archive-desc{color:var(--ink-2);margin-bottom:28px}
.post-list{display:grid;gap:22px}
.post-row{display:grid;grid-template-columns:240px 1fr;gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.post-row .card__thumb{aspect-ratio:auto;height:100%;min-height:170px}
.post-row .card__body{padding:20px 22px 20px 0}
.navigation.pagination{margin-top:36px}
.nav-links{display:flex;gap:8px;flex-wrap:wrap;font-family:var(--font-ui)}
.page-numbers{padding:.5em .95em;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);text-decoration:none;font-weight:600}
.page-numbers.current,.page-numbers:hover{background:var(--brand);border-color:var(--brand);color:#fff}

/* Single */
.crumbs{font-family:var(--font-ui);font-size:.85rem;margin-bottom:10px}
.crumbs a{text-decoration:none;font-weight:600}
.entry-header{margin-bottom:22px}
.entry-thumb{border-radius:var(--radius);overflow:hidden;margin-bottom:28px}
.entry-thumb img{width:100%}
.entry-content{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(20px,4vw,44px)}
.entry-content>*:first-child{margin-top:0}
.entry-content img{border-radius:8px}
.entry-content pre,.entry-content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em}
.entry-content pre{background:var(--ink);color:#e6edf5;padding:18px 20px;border-radius:8px;overflow-x:auto;line-height:1.55}
.entry-content :not(pre)>code{background:var(--brand-tint);color:var(--brand-dark);padding:.1em .4em;border-radius:4px}
.entry-content table{width:100%;border-collapse:collapse;font-family:var(--font-ui);font-size:.95rem;display:block;overflow-x:auto}
.entry-content th,.entry-content td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.entry-content th{background:var(--brand-tint)}
.entry-content blockquote{margin:1.5em 0;padding:.2em 0 .2em 1.2em;border-left:4px solid var(--accent);color:var(--ink-2)}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 0;padding:0;list-style:none}
.tag-list a{font-family:var(--font-ui);font-size:.85rem;padding:.3em .85em;background:var(--brand-tint);border-radius:99px;text-decoration:none;font-weight:600}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:32px 0;font-family:var(--font-ui)}
.post-nav a{display:block;background:#fff;border:1px solid var(--line);border-radius:8px;padding:14px 18px;text-decoration:none;color:var(--ink);font-weight:600}
.post-nav a:hover{border-color:var(--brand)}
.post-nav .next{text-align:right}
.related h2{font-size:1.4rem}
.related .grid{grid-template-columns:repeat(2,1fr)}
.comments-area{margin-top:40px}
.comment-list{list-style:none;padding:0}
.comment-body{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px 20px;margin-bottom:14px}
.comment-respond input[type=text],.comment-respond input[type=email],.comment-respond input[type=url],.comment-respond textarea{width:100%;font:inherit;padding:.7em 1em;border:1px solid var(--line);border-radius:8px}
.comment-respond input[type=submit]{font-family:var(--font-ui);font-weight:600;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:.8em 1.5em;cursor:pointer}

/* Footer */
.site-footer{background:var(--ink);color:#c5d0de;margin-top:0;font-family:var(--font-ui)}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 40px}
.site-footer h3{color:#fff;font-size:1rem;margin:0 0 14px}
.site-footer a{color:#c5d0de;text-decoration:none}
.site-footer a:hover{color:var(--accent)}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.site-footer p{font-size:.95rem;line-height:1.6}
.footer-logo{background:#fff;border-radius:8px;padding:8px 12px;display:inline-block;margin-bottom:14px}
.footer-logo img{height:34px;width:auto}
.footer-topics{border-top:1px solid rgba(255,255,255,.12);padding:22px 0}
.footer-topics h3{display:inline-block;margin:0 14px 0 0}
.footer-topics .chips{display:inline-flex;vertical-align:middle}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.9rem}
.footer-bottom ul{display:flex;gap:18px}
.to-top{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;border:0;background:var(--accent);color:var(--ink);font-size:1.3rem;font-weight:700;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s;z-index:40}
.to-top.is-visible{opacity:1;pointer-events:auto}

/* Responsive */
@media (max-width:1000px){
  .hero .wrap,.split{grid-template-columns:1fr}
  .grid{grid-template-columns:repeat(2,1fr)}
  .tiles{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .menu-toggle{display:inline-block}
  .main-nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);padding:12px 20px}
  .main-nav.is-open{display:block}
  .main-nav ul{flex-direction:column;align-items:stretch}
  .nav-tools{margin-left:auto}
}
@media (max-width:640px){
  body{font-size:17px}
  .grid,.related .grid,.tiles,.footer-grid,.post-nav{grid-template-columns:1fr}
  .post-row{grid-template-columns:1fr}
  .post-row .card__body{padding:0 20px 20px}
  .promo--inline{grid-template-columns:1fr}
  .hero{padding:48px 0 56px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Tutorials: each interview question (h3) reads as its own block */
.tutorial .ad--top{margin:4px 0 26px}
.tutorial .entry-content h3{font-size:1.25rem;margin:2em 0 .6em;padding-left:.7em;border-left:4px solid var(--accent)}
.tutorial .entry-content h3:first-child{margin-top:0}
.tutorial .entry-content ol,.tutorial .entry-content ul{padding-left:1.4em}
.tutorial .entry-content li{margin-bottom:.5em}