/*
Theme Name: Guru's Den
Theme URI: https://usmanlive.com
Author: Usman Akram
Description: A custom developer-studio theme for Guru's Den — where experience becomes practical knowledge, and students become confident builders. Built for a working web developer and instructor: dark, editor-inspired design, custom project/technology/teaching content types, and full support for the site's existing course and exam content.
Version: 1.0.0
Requires at least: 6.4
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: gurusden
*/

/* -------------------------------------------------------------------- */
/* 1. Reset                                                              */
/* -------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
body { margin: 0; }
img, picture, video { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
ul[class], ol[class] { list-style: none; margin: 0; padding: 0; }
a { text-decoration: none; color: inherit; }
table { border-collapse: collapse; width: 100%; }

/* -------------------------------------------------------------------- */
/* 2. Design tokens — dark, editor-inspired, by design intent            */
/* -------------------------------------------------------------------- */
:root {
	--bg: #0a0e16;
	--bg-elevated: #121826;
	--bg-elevated-2: #1a2233;
	--ink: #eef1f8;
	--ink-muted: #93a0b8;
	--ink-faint: #5c6884;
	--border: #232c40;
	--border-strong: #313d59;

	--accent: #2dd4bf;
	--accent-ink: #06251f;
	--accent-2: #a78bfa;
	--accent-warm: #fbbf24;
	--gradient-brand: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);

	--code-bg: #0d1420;
	--code-ink: #d7e0f0;
	--shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.4);
	--shadow-glow: 0 0 0 1px rgba(45, 212, 191, 0.15), 0 8px 30px rgba(45, 212, 191, 0.08);

	--font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
	--font-body: 'Inter', 'Segoe UI', sans-serif;
	--font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

	--space-1: 0.25rem;
	--space-2: 0.5rem;
	--space-3: 1rem;
	--space-4: 1.5rem;
	--space-5: 2.5rem;
	--space-6: 4rem;
	--space-7: 6rem;
	--space-8: 9rem;

	--radius: 14px;
	--radius-sm: 8px;
	--radius-lg: 22px;
	--container: 1240px;
	--measure: 42rem;
}

/* -------------------------------------------------------------------- */
/* 3. Base typography                                                    */
/* -------------------------------------------------------------------- */
body {
	background: var(--bg);
	color: var(--ink);
	font-family: var(--font-body);
	font-size: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
	line-height: 1.65;
}

h1, h2, h3, h4, h5, h6 {
	font-family: var(--font-display);
	font-weight: 600;
	line-height: 1.2;
	letter-spacing: -0.01em;
	margin: 0 0 var(--space-3);
	color: var(--ink);
}

p { margin: 0 0 var(--space-3); }
a { color: var(--accent); }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
::selection { background: var(--accent); color: var(--accent-ink); }

.screen-reader-text {
	border: 0; clip: rect(1px, 1px, 1px, 1px); clip-path: inset(50%);
	height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px; word-wrap: normal;
}
.skip-link {
	position: absolute; top: -100px; left: var(--space-3); z-index: 1000;
	background: var(--accent); color: var(--accent-ink); padding: var(--space-2) var(--space-3);
	border-radius: var(--radius-sm); font-weight: 600; transition: top 0.2s ease;
}
.skip-link:focus { top: var(--space-3); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--space-4); }
.eyebrow {
	font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em;
	font-size: 0.76rem; color: var(--accent); display: inline-flex; align-items: center; gap: 8px;
}
.eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.section-title { font-size: clamp(1.6rem, 1.4rem + 1vw, 2.2rem); margin-bottom: var(--space-2); }
.section-intro { color: var(--ink-muted); max-width: 46rem; margin-bottom: var(--space-6); }
.section-head { margin-bottom: var(--space-5); }

.gradient-text {
	background: var(--gradient-brand); -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* -------------------------------------------------------------------- */
/* 4. Buttons                                                            */
/* -------------------------------------------------------------------- */
.btn {
	display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-display); font-weight: 600;
	font-size: 0.95rem; padding: 13px 26px; border-radius: 999px; border: 1px solid transparent;
	transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary { background: var(--gradient-brand); color: var(--accent-ink); }
.btn-primary:hover { box-shadow: 0 10px 30px rgba(45, 212, 191, 0.25); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; }

/* -------------------------------------------------------------------- */
/* 5. Top bar + header                                                   */
/* -------------------------------------------------------------------- */
.topbar { background: var(--code-bg); border-bottom: 1px solid var(--border); font-family: var(--font-mono); font-size: 0.78rem; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 8px; color: var(--ink-faint); }
.topbar-prompt .prompt-user { color: var(--accent); }
.topbar-prompt .prompt-at, .topbar-prompt .prompt-sep { color: var(--ink-faint); }
.topbar-prompt .prompt-host { color: var(--accent-2); }
.topbar-menu { display: flex; gap: var(--space-4); }
.topbar-menu a:hover { color: var(--accent); }

.site-header {
	position: sticky; top: 0; z-index: 50;
	background: color-mix(in srgb, var(--bg) 85%, transparent);
	backdrop-filter: blur(12px); border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: var(--space-4); padding-block: var(--space-3); }
.site-branding { margin-right: auto; }
.site-branding .custom-logo-link img { max-height: 36px; width: auto; }
.site-title { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--ink); }
.site-title:hover { color: var(--accent); text-decoration: none; }
.brand-dot { color: var(--accent); }

.main-navigation .nav-menu { display: flex; gap: var(--space-4); align-items: center; }
.main-navigation .nav-menu a { color: var(--ink-muted); font-size: 0.92rem; font-weight: 500; padding: var(--space-2) 0; position: relative; }
.main-navigation .nav-menu a:hover { color: var(--ink); text-decoration: none; }
.main-navigation .nav-menu a::after { content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--gradient-brand); transform: scaleX(0); transition: transform 0.2s ease; }
.main-navigation .nav-menu a:hover::after { transform: scaleX(1); }
.main-navigation .current-menu-item > a { color: var(--ink); }
.main-navigation .current-menu-item > a::after { transform: scaleX(1); }

.main-navigation .nav-menu li { position: relative; }
.main-navigation .nav-menu .menu-item-has-children > a { display: inline-flex; align-items: center; gap: 5px; }
.main-navigation .nav-menu .menu-item-has-children > a::before { content: ''; width: 6px; height: 6px; margin-top: -2px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); opacity: 0.6; order: 2; }
.main-navigation .nav-menu .sub-menu {
	position: absolute; top: 100%; left: 0; min-width: 220px; background: var(--bg-elevated);
	border: 1px solid var(--border); border-radius: var(--radius-sm); box-shadow: var(--shadow);
	padding: var(--space-2) 0; margin-top: var(--space-3); display: flex; flex-direction: column;
	opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s; z-index: 100;
}
.main-navigation .nav-menu .sub-menu .sub-menu { top: -10px; left: calc(100% + 6px); margin-top: 0; }
.main-navigation .nav-menu li:hover > .sub-menu,
.main-navigation .nav-menu li.is-open > .sub-menu,
.main-navigation .nav-menu li:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.main-navigation .nav-menu .sub-menu a { display: block; padding: 8px var(--space-3); font-size: 0.88rem; white-space: nowrap; }
.main-navigation .nav-menu .sub-menu a::after, .main-navigation .nav-menu .sub-menu a::before { display: none; }
.main-navigation .nav-menu .sub-menu a:hover { color: var(--accent); background: var(--bg-elevated-2); }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }
.icon-btn {
	background: transparent; border: 1px solid var(--border-strong); border-radius: 999px;
	width: 38px; height: 38px; display: grid; place-items: center; color: var(--ink);
	transition: border-color 0.2s ease, color 0.2s ease;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }
.mobile-only { display: none; }

@media (max-width: 860px) {
	.header-cta { display: none; }
	.topbar-nav { display: none; }
	.main-navigation { position: fixed; inset: 0 0 0 auto; width: min(320px, 85vw); background: var(--bg-elevated);
		transform: translateX(100%); transition: transform 0.25s ease; z-index: 70; padding: var(--space-6) var(--space-4);
		box-shadow: var(--shadow); overflow-y: auto; border-left: 1px solid var(--border); }
	.main-navigation .nav-menu { flex-direction: column; align-items: flex-start; gap: var(--space-3); width: 100%; }
	body.nav-open .main-navigation { transform: translateX(0); }
	.mobile-only { display: grid; }
	.main-navigation .nav-menu .sub-menu {
		position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none;
		background: transparent; margin: var(--space-2) 0 0 var(--space-3); padding: 0; border-left: 2px solid var(--border);
		padding-left: var(--space-3); max-height: 0; overflow: hidden;
	}
	.main-navigation .nav-menu li.is-open > .sub-menu { max-height: 1000px; }
	.main-navigation .nav-menu .menu-item-has-children > a { width: 100%; justify-content: space-between; }
}

/* -------------------------------------------------------------------- */
/* 6. Generic page/post content (covers all existing course/exam pages) */
/* -------------------------------------------------------------------- */
.site-main { padding-block: var(--space-6); }
.page-header-block, .archive-header { text-align: center; max-width: var(--measure); margin: 0 auto var(--space-6); }
.page-header-block h1, .archive-header h1 { font-size: clamp(1.8rem, 1.5rem + 1.5vw, 2.6rem); }
.archive-description { color: var(--ink-muted); }

.entry-header { max-width: var(--measure); margin: 0 auto var(--space-5); text-align: center; }
.entry-title { font-size: clamp(1.8rem, 1.4rem + 2vw, 2.8rem); margin-top: var(--space-2); }
.entry-meta { font-family: var(--font-mono); font-size: 0.85rem; color: var(--ink-muted); display: flex; gap: var(--space-2); justify-content: center; flex-wrap: wrap; }
.entry-meta a { color: var(--ink-muted); }
.entry-meta a:hover { color: var(--accent); }
.meta-sep { opacity: 0.5; }

.entry-thumb { max-width: 980px; margin: 0 auto var(--space-6); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }

.entry-content { max-width: var(--measure); margin-inline: auto; }
.entry-content > *:first-child { margin-top: 0; }
.entry-content h2 { font-size: 1.5rem; margin-top: var(--space-6); }
.entry-content h3 { font-size: 1.2rem; margin-top: var(--space-5); }
.entry-content p { margin-bottom: var(--space-4); }
.entry-content ul, .entry-content ol { margin: 0 0 var(--space-4); padding-left: 1.3em; }
.entry-content li { margin-bottom: var(--space-2); }
.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }
.entry-content img { border-radius: var(--radius-sm); margin-block: var(--space-4); }
.entry-content figcaption { font-size: 0.85rem; color: var(--ink-muted); text-align: center; margin-top: var(--space-2); }
.entry-content blockquote { margin: var(--space-5) 0; padding: var(--space-2) 0 var(--space-2) var(--space-4); border-left: 3px solid var(--accent); font-style: italic; color: var(--ink); background: var(--bg-elevated); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding-block: var(--space-3); }
.entry-content hr { border: none; border-top: 1px solid var(--border); margin: var(--space-6) 0; }
.entry-content code { font-family: var(--font-mono); background: var(--code-bg); color: var(--code-ink); padding: 0.15em 0.4em; border-radius: 4px; font-size: 0.88em; border: 1px solid var(--border); }
.entry-content pre { background: var(--code-bg); color: var(--code-ink); padding: var(--space-4); border-radius: var(--radius-sm); overflow-x: auto; margin: var(--space-5) 0; font-size: 0.88rem; line-height: 1.6; border: 1px solid var(--border); }
.entry-content pre code { background: none; padding: 0; border: none; }
.entry-content table { margin: var(--space-5) 0; font-size: 0.92rem; overflow-x: auto; display: block; }
.entry-content th, .entry-content td { border: 1px solid var(--border); padding: var(--space-2) var(--space-3); text-align: left; }
.entry-content th { background: var(--bg-elevated); font-family: var(--font-mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.entry-content a { text-decoration: underline; text-underline-offset: 3px; }
.page-links { margin-top: var(--space-5); font-family: var(--font-mono); font-size: 0.85rem; }

/* -------------------------------------------------------------------- */
/* 7. Post cards (blog listing)                                          */
/* -------------------------------------------------------------------- */
.posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.post-card { display: flex; flex-direction: column; background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease; }
.post-card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.post-card-thumb { aspect-ratio: 16/10; overflow: hidden; background: var(--code-bg); }
.post-card-thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-card-body { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-2); flex: 1; }
.post-card-category { align-self: flex-start; font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent-2); border: 1px solid currentColor; border-radius: 999px; padding: 2px 10px; }
.post-card-title { font-size: 1.15rem; margin: 0; }
.post-card-title a { color: var(--ink); }
.post-card-title a:hover { color: var(--accent); text-decoration: none; }
.post-card-excerpt { color: var(--ink-muted); font-size: 0.94rem; margin: 0; }
.post-card-meta { margin-top: auto; padding-top: var(--space-2); font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint); display: flex; gap: var(--space-2); align-items: center; }

/* -------------------------------------------------------------------- */
/* 8. Comments                                                           */
/* -------------------------------------------------------------------- */
.comments-area { max-width: var(--measure); margin: var(--space-7) auto 0; padding-inline: var(--space-4); }
.comments-title { font-size: 1.3rem; }
.comment-list { display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-4); }
.comment-list .children { margin-top: var(--space-4); padding-left: var(--space-5); border-left: 2px solid var(--border); }
.comment-body { display: flex; gap: var(--space-3); }
.comment-author-avatar { border-radius: 50%; flex-shrink: 0; }
.comment-meta { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-muted); margin-bottom: 4px; }
.comment-respond { margin-top: var(--space-5); }
.comment-form label { display: block; font-size: 0.85rem; margin-bottom: 4px; color: var(--ink-muted); }
.comment-form input[type="text"], .comment-form input[type="email"], .comment-form input[type="url"], .comment-form textarea {
	width: 100%; padding: var(--space-2) var(--space-3); border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
	background: var(--bg-elevated); color: var(--ink);
}
.comment-form textarea { min-height: 120px; }

/* -------------------------------------------------------------------- */
/* 9. Forms / search / widgets                                           */
/* -------------------------------------------------------------------- */
.search-form { display: flex; gap: var(--space-2); width: 100%; }
.search-form .search-field { flex: 1; padding: var(--space-2) var(--space-3); border: 1px solid var(--border-strong); border-radius: var(--radius-sm); background: var(--bg-elevated); color: var(--ink); }
.search-form .search-submit { background: var(--gradient-brand); color: var(--accent-ink); border: none; border-radius: var(--radius-sm); padding: var(--space-2) var(--space-4); font-weight: 600; }

.widget { margin-bottom: var(--space-5); }
.widget-title { font-size: 1rem; margin-bottom: var(--space-3); color: var(--ink); }
.widget ul { display: flex; flex-direction: column; gap: 6px; }
.widget a { color: var(--ink-muted); }
.widget a:hover { color: var(--accent); }

/* -------------------------------------------------------------------- */
/* 10. Footer                                                            */
/* -------------------------------------------------------------------- */
.site-footer { position: relative; border-top: 1px solid var(--border); margin-top: var(--space-7); padding-top: var(--space-6); overflow: hidden; }
.footer-glow { position: absolute; top: -200px; left: 50%; transform: translateX(-50%); width: 600px; height: 300px; background: radial-gradient(ellipse, rgba(45,212,191,0.12), transparent 70%); pointer-events: none; }
.footer-grid { position: relative; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--space-5); padding-bottom: var(--space-5); }
.footer-logo { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; margin: 0; }
.footer-tagline { color: var(--ink-muted); font-size: 0.92rem; }
.footer-socials { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-top: var(--space-3); }
.footer-socials a { font-family: var(--font-mono); font-size: 0.82rem; color: var(--ink-muted); border: 1px solid var(--border); border-radius: 999px; padding: 5px 14px; }
.footer-socials a:hover { color: var(--accent); border-color: var(--accent); text-decoration: none; }
.footer-menu-list { display: flex; flex-direction: column; gap: 8px; }
.footer-menu-list a { color: var(--ink-muted); font-size: 0.92rem; }
.footer-menu-list a:hover { color: var(--accent); }
.site-info { position: relative; border-top: 1px solid var(--border); padding-block: var(--space-4); font-size: 0.85rem; color: var(--ink-faint); }

.back-to-top {
	position: fixed; bottom: var(--space-4); right: var(--space-4); width: 44px; height: 44px; border-radius: 50%;
	background: var(--gradient-brand); color: var(--accent-ink); border: none; display: grid; place-items: center;
	box-shadow: var(--shadow); font-size: 1.1rem; z-index: 40; opacity: 0; transform: translateY(10px);
	transition: opacity 0.2s ease, transform 0.2s ease;
}
.back-to-top.is-visible { opacity: 1; transform: translateY(0); }
.back-to-top[hidden] { display: none; }

/* -------------------------------------------------------------------- */
/* 11. 404 / no-results                                                  */
/* -------------------------------------------------------------------- */
.error-404, .no-results { text-align: center; max-width: var(--measure); margin: var(--space-7) auto; padding-inline: var(--space-4); }
.error-404 .error-code { font-family: var(--font-display); font-size: clamp(4rem, 3rem + 4vw, 7rem); margin-bottom: var(--space-3); }
.error-404 .search-form { max-width: 420px; margin: var(--space-4) auto 0; }

/* -------------------------------------------------------------------- */
/* 12. Responsive                                                        */
/* -------------------------------------------------------------------- */
@media (max-width: 980px) {
	.posts-grid { grid-template-columns: repeat(2, 1fr); }
	.footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
	.posts-grid { grid-template-columns: 1fr; }
	.footer-grid { grid-template-columns: 1fr; }
}