/*
 * ComputingSkill theme stylesheet.
 * Mobile-first, no external framework, semantic HTML targeted.
 */

:root {
	--cs-bg: #ffffff;
	--cs-bg-alt: #f5f7fa;
	--cs-text: #1b2430;
	--cs-text-muted: #5b6675;
	--cs-border: #dde3ea;
	--cs-primary: #1b5fbf;
	--cs-primary-dark: #144a96;
	--cs-accent: #0f9d6e;
	--cs-warning-bg: #fff6e0;
	--cs-warning-text: #7a5b00;
	--cs-error-bg: #fdecea;
	--cs-error-text: #b3261e;
	--cs-radius: 10px;
	--cs-max-width: 1160px;
	--cs-narrow-width: 820px;
	font-size: 16px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
	margin: 0;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	color: var(--cs-text);
	background: var(--cs-bg);
	line-height: 1.6;
	overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--cs-primary); text-decoration: none; }
a:hover, a:focus { text-decoration: underline; }

h1, h2, h3, h4 { line-height: 1.25; margin: 1.4em 0 0.6em; font-weight: 700; }
h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin-top: 0; }
h2 { font-size: clamp(1.35rem, 3vw, 1.7rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.4em; }

table { border-collapse: collapse; width: 100%; }

.screen-reader-text {
	position: absolute !important;
	clip: rect(1px, 1px, 1px, 1px);
	width: 1px; height: 1px; overflow: hidden;
}

.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	background: var(--cs-primary);
	color: #fff;
	padding: 0.6em 1em;
	z-index: 1000;
}
.skip-link:focus { left: 0; }

a:focus, button:focus, input:focus, select:focus, textarea:focus {
	outline: 3px solid #1b5fbf;
	outline-offset: 2px;
}

.cs-container {
	max-width: var(--cs-max-width);
	margin: 0 auto;
	padding: 0 16px;
}
.cs-narrow { max-width: var(--cs-narrow-width); }

/* ---------- Header ---------- */
.cs-site-header {
	border-bottom: 1px solid var(--cs-border);
	background: var(--cs-bg);
	position: sticky;
	top: 0;
	z-index: 100;
}
.cs-header-inner {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 12px;
	padding-top: 12px;
	padding-bottom: 12px;
}
.cs-branding { flex: 1 1 auto; }
.cs-site-title { font-size: 1.25rem; font-weight: 800; color: var(--cs-text); }
.cs-menu-toggle {
	display: inline-flex;
	align-items: center;
	background: none;
	border: 1px solid var(--cs-border);
	border-radius: 8px;
	padding: 8px 10px;
	cursor: pointer;
}
.cs-menu-icon { display: block; width: 20px; height: 2px; background: var(--cs-text); position: relative; }
.cs-menu-icon::before, .cs-menu-icon::after { content: ""; position: absolute; left: 0; width: 20px; height: 2px; background: var(--cs-text); }
.cs-menu-icon::before { top: -6px; }
.cs-menu-icon::after { top: 6px; }

.cs-primary-navigation { flex: 1 1 100%; order: 3; display: none; }
.cs-primary-navigation.is-open { display: block; }
#cs-primary-menu, .cs-primary-navigation ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
#cs-primary-menu a, .cs-primary-navigation ul a {
	display: block;
	padding: 10px 6px;
	color: var(--cs-text);
	border-bottom: 1px solid var(--cs-border);
}

.cs-search-form { flex: 1 1 100%; order: 4; display: flex; gap: 6px; }
.cs-search-form input[type="search"] {
	flex: 1;
	padding: 10px 12px;
	border: 1px solid var(--cs-border);
	border-radius: 8px;
	font-size: 1rem;
	min-width: 0;
}
.cs-search-form button {
	border: 1px solid var(--cs-primary);
	background: var(--cs-primary);
	color: #fff;
	border-radius: 8px;
	padding: 0 14px;
	cursor: pointer;
	font-size: 1.1rem;
}

@media (min-width: 900px) {
	.cs-menu-toggle { display: none; }
	.cs-header-inner { flex-wrap: nowrap; }
	.cs-primary-navigation { display: block; order: 2; flex: 0 0 auto; }
	#cs-primary-menu { flex-direction: row; gap: 22px; }
	#cs-primary-menu a { border-bottom: none; padding: 8px 2px; }
	.cs-search-form { order: 3; flex: 0 0 260px; }
}

/* ---------- Breadcrumbs ---------- */
.cs-breadcrumbs { margin: 16px 0; font-size: 0.9rem; color: var(--cs-text-muted); }
.cs-breadcrumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; margin: 0; padding: 0; }
.cs-breadcrumbs li:not(:last-child)::after { content: "›"; margin: 0 6px; color: var(--cs-border); }
.cs-breadcrumbs a { color: var(--cs-text-muted); }

/* ---------- Cards ---------- */
.cs-card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin: 18px 0; }
.cs-card {
	display: flex;
	flex-direction: column;
	gap: 4px;
	padding: 16px;
	border: 1px solid var(--cs-border);
	border-radius: var(--cs-radius);
	background: var(--cs-bg-alt);
	color: var(--cs-text);
}
.cs-card:hover, .cs-card:focus { text-decoration: none; border-color: var(--cs-primary); }
.cs-card-title { font-weight: 700; }
.cs-card-desc { font-size: 0.9rem; color: var(--cs-text-muted); }
.cs-card-icon { font-size: 1.4rem; }

.cs-related { margin: 28px 0; padding: 18px; background: var(--cs-bg-alt); border-radius: var(--cs-radius); }
.cs-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 8px; list-style: none; margin: 12px 0 0; padding: 0; }
.cs-related-grid a { display: block; padding: 8px 10px; background: var(--cs-bg); border: 1px solid var(--cs-border); border-radius: 8px; }

/* ---------- Hero / homepage ---------- */
.cs-hero { background: linear-gradient(180deg, var(--cs-bg-alt), var(--cs-bg)); padding: 48px 0 30px; text-align: center; }
.cs-hero-sub { font-size: 1.1rem; color: var(--cs-text-muted); max-width: 640px; margin: 0 auto 20px; }
.cs-hero-search { max-width: 520px; margin: 0 auto; }
.cs-home-section { margin: 40px 0; }
.cs-section-more { margin-top: 4px; }
.cs-why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.cs-why-grid h3 { margin-top: 0; }

/* ---------- Articles / single pages ---------- */
.cs-article-content h2 { margin-top: 2em; }
.cs-article-content table { margin: 1em 0; }
.cs-article-content th, .cs-article-content td { border: 1px solid var(--cs-border); padding: 8px 10px; text-align: left; }
.cs-article-content img { border-radius: 8px; }
.cs-lede { font-size: 1.1rem; color: var(--cs-text-muted); }

/* ---------- Tables (responsive) ---------- */
.cs-table-wrap { overflow-x: auto; margin: 1em 0; -webkit-overflow-scrolling: touch; }
.cs-hardware-table { min-width: 480px; }
.cs-hardware-table th, .cs-hardware-table td { border: 1px solid var(--cs-border); padding: 8px 10px; text-align: left; font-size: 0.95rem; }
.cs-hardware-table thead { background: var(--cs-bg-alt); }

/* ---------- Spec columns (bottleneck pages) ---------- */
.cs-spec-columns { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 700px) { .cs-spec-columns { grid-template-columns: 1fr 1fr; } }
.cs-spec-list { list-style: none; padding: 0; margin: 0; }
.cs-spec-list li { padding: 6px 0; border-bottom: 1px solid var(--cs-border); }

/* ---------- FAQ ---------- */
.cs-faq { margin: 28px 0; }
.cs-faq-item { border-bottom: 1px solid var(--cs-border); padding: 14px 0; }
.cs-faq-question { margin: 0 0 6px; font-size: 1.05rem; }
.cs-faq-answer p:last-child { margin-bottom: 0; }

/* ---------- Calculator widget ---------- */
.cs-calculator {
	border: 1px solid var(--cs-border);
	border-radius: 16px;
	padding: 22px;
	background: var(--cs-bg-alt);
	margin: 20px 0 28px;
	box-shadow: 0 1px 2px rgba(15, 23, 38, 0.04), 0 8px 24px rgba(15, 23, 38, 0.05);
}
.cs-calc-fields { display: grid; grid-template-columns: 1fr; gap: 14px; margin-bottom: 18px; }
@media (min-width: 640px) { .cs-calc-fields { grid-template-columns: 1fr 1fr; } }
.cs-field { display: flex; flex-direction: column; gap: 6px; }
.cs-field label { font-weight: 600; font-size: 0.92rem; }
.cs-field input[type="number"], .cs-field input[type="text"], .cs-field input[type="email"], .cs-field select, .cs-field textarea {
	padding: 10px 12px;
	border: 1px solid var(--cs-border);
	border-radius: 8px;
	font-size: 1rem;
	width: 100%;
	background: var(--cs-bg);
	color: var(--cs-text);
}
.cs-field-inline { flex-direction: row; align-items: center; gap: 8px; }
.cs-field-inline label { order: 2; font-weight: 500; }
.cs-field-inline input { order: 1; width: auto; }
.cs-field-help { font-size: 0.82rem; color: var(--cs-text-muted); margin: 0; }

/* Icon-illustrated field cards — an input row that opts in with an
   `icon` key renders as a bordered card with a small icon box on the
   right, matching a modern "product" calculator feel. */
.cs-field-has-icon {
	flex-direction: row;
	align-items: center;
	justify-content: space-between;
	gap: 14px;
	background: var(--cs-bg);
	border: 1px solid var(--cs-border);
	border-radius: 12px;
	padding: 12px 14px;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.cs-field-has-icon:hover { border-color: var(--cs-primary); box-shadow: 0 0 0 3px rgba(27, 95, 191, 0.08); }
.cs-field-has-icon .cs-field-main { flex: 1 1 auto; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.cs-field-icon {
	flex: 0 0 auto;
	width: 44px;
	height: 44px;
	border-radius: 10px;
	background: var(--cs-bg-alt);
	color: var(--cs-primary);
	display: flex;
	align-items: center;
	justify-content: center;
}
.cs-field-icon svg { width: 26px; height: 26px; }

.cs-calc-actions { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.cs-calc-submit, .cs-calc-reset {
	padding: 12px 26px;
	border-radius: 999px;
	font-size: 1rem;
	font-weight: 600;
	cursor: pointer;
	border: 1px solid transparent;
	transition: background 0.15s ease, transform 0.05s ease;
}
.cs-calc-submit { background: var(--cs-primary); color: #fff; }
.cs-calc-submit:hover { background: var(--cs-primary-dark); }
.cs-calc-submit:active { transform: scale(0.98); }
.cs-calc-reset { background: transparent; border-color: var(--cs-border); color: var(--cs-text); }
.cs-calc-reset:hover { border-color: var(--cs-text-muted); }

.cs-calc-result:empty { display: none; }
.cs-calc-result { background: var(--cs-bg); border-radius: 12px; padding: 4px 2px; }
.cs-result-block { padding: 14px; }
.cs-result-headline { font-size: 1.1rem; font-weight: 700; margin: 0 0 10px; }
.cs-result-table { width: 100%; margin: 10px 0; }
.cs-result-table th, .cs-result-table td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--cs-border); font-size: 0.95rem; }
.cs-result-table th { font-weight: 600; color: var(--cs-text-muted); width: 55%; }
.cs-priority-list { padding-left: 1.2em; }

.cs-disclaimer { font-size: 0.85rem; color: var(--cs-text-muted); margin-top: 10px; }
.cs-warnings { margin-bottom: 10px; }
.cs-warning { background: var(--cs-warning-bg); color: var(--cs-warning-text); padding: 8px 10px; border-radius: 6px; font-size: 0.88rem; margin: 0 0 6px; }
.cs-error { background: var(--cs-error-bg); color: var(--cs-error-text); padding: 10px 12px; border-radius: 6px; font-weight: 600; }
.cs-noscript-notice { background: var(--cs-warning-bg); color: var(--cs-warning-text); padding: 10px; border-radius: 6px; }

/* ---------- Contact form ---------- */
.cs-contact-form { display: flex; flex-direction: column; gap: 14px; max-width: 520px; }
.cs-contact-form .cs-field label { font-weight: 600; margin-bottom: 4px; display: block; }
.cs-contact-form button { align-self: flex-start; padding: 11px 24px; background: var(--cs-primary); color: #fff; border: none; border-radius: 8px; cursor: pointer; font-size: 1rem; }
.cs-contact-status { padding: 10px 14px; border-radius: 8px; font-weight: 600; }
.cs-contact-success { background: #e6f6ee; color: #0f6b45; }
.cs-contact-error { background: var(--cs-error-bg); color: var(--cs-error-text); }
.cs-hp-field { position: absolute; left: -9999px; }

/* ---------- Archive / search ---------- */
.cs-archive-header { margin: 24px 0; }
.cs-archive-intro { color: var(--cs-text-muted); max-width: 720px; }
.cs-post-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; margin: 20px 0; }
.cs-post-card-thumb img { border-radius: 8px; }

/* ---------- Footer ---------- */
.cs-site-footer { background: var(--cs-bg-alt); border-top: 1px solid var(--cs-border); margin-top: 48px; padding: 40px 0 20px; }
.cs-footer-inner { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 700px) { .cs-footer-inner { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.cs-footer-inner h3 { margin-top: 0; font-size: 1rem; }
.cs-footer-inner ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.cs-footer-inner a { color: var(--cs-text); }
.cs-footer-logo { font-weight: 800; font-size: 1.15rem; margin: 0 0 6px; }
.cs-footer-bottom { text-align: center; color: var(--cs-text-muted); font-size: 0.85rem; margin-top: 30px; }

/* ---------- 404 ---------- */
.cs-404 { padding: 60px 0; text-align: center; }
.cs-404-search { max-width: 480px; margin: 20px auto 30px; }

/* ---------- Utility ---------- */
@media (max-width: 480px) {
	.cs-hardware-table { min-width: 100%; font-size: 0.85rem; }
}

/* ---------- Blog / Articles hub ---------- */
.cs-blog-hero {
	background: linear-gradient(135deg, #0f1726 0%, var(--cs-primary-dark) 60%, var(--cs-primary) 100%);
	color: #fff;
	padding: 40px 0 28px;
}
.cs-blog-hero .cs-breadcrumbs { color: #c9d7ef; }
.cs-blog-hero .cs-breadcrumbs a { color: #c9d7ef; }
.cs-blog-title { margin: 10px 0 10px; font-size: 2rem; }
.cs-blog-intro { color: #c9d7ef; max-width: 700px; margin: 0 0 22px; }
.cs-blog-search-form { display: flex; gap: 8px; max-width: 560px; margin: 0 0 20px; }
.cs-blog-search-form input[type="search"] {
	flex: 1;
	padding: 12px 14px;
	border-radius: var(--cs-radius);
	border: 1px solid transparent;
	font-size: 1rem;
}
.cs-blog-search-form button {
	padding: 12px 20px;
	border-radius: var(--cs-radius);
	border: none;
	background: var(--cs-accent);
	color: #fff;
	font-weight: 700;
	cursor: pointer;
}
.cs-blog-search-form button:hover { background: #0c8360; }
.cs-blog-quicklinks { display: flex; flex-wrap: wrap; gap: 8px 10px; }
.cs-blog-quicklinks a {
	color: #fff;
	background: rgba(255,255,255,0.12);
	border: 1px solid rgba(255,255,255,0.25);
	border-radius: 999px;
	padding: 6px 14px;
	font-size: 0.88rem;
}
.cs-blog-quicklinks a:hover { background: rgba(255,255,255,0.22); text-decoration: none; }

.cs-blog-featured, .cs-blog-category { margin: 40px 0; scroll-margin-top: 20px; }
.cs-blog-section-desc { color: var(--cs-text-muted); margin: 4px 0 16px; max-width: 720px; }
.cs-blog-category-header { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 8px 20px; }
.cs-blog-category-header h2 { margin-bottom: 2px; }
.cs-blog-view-all { white-space: nowrap; font-weight: 700; }
.cs-blog-card { position: relative; padding-top: 34px; }
.cs-blog-card-tag {
	position: absolute;
	top: 14px;
	left: 16px;
	font-size: 0.72rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.02em;
	color: var(--cs-primary);
	background: var(--cs-bg-alt);
	border-radius: 999px;
	padding: 3px 10px;
}
.cs-blog-featured-grid .cs-card { border-color: var(--cs-primary); }

@media (max-width: 480px) {
	.cs-blog-search-form { flex-direction: column; }
}

/* ---------- Games hub (/games/) ---------- */
.cs-games-hero {
	background: linear-gradient(135deg, #0f1726 0%, var(--cs-primary-dark) 60%, var(--cs-primary) 100%);
	color: #fff;
	padding: 40px 0 28px;
}
.cs-games-hero .cs-breadcrumbs { color: #c9d7ef; }
.cs-games-hero .cs-breadcrumbs a { color: #c9d7ef; }
.cs-games-title { margin: 10px 0 10px; font-size: 2rem; }
.cs-games-intro { color: #c9d7ef; max-width: 700px; margin: 0 0 22px; }
.cs-games-search-form { display: flex; gap: 8px; max-width: 560px; margin: 0; }
.cs-games-search-form input[type="search"] {
	flex: 1;
	padding: 12px 14px;
	border-radius: var(--cs-radius);
	border: 1px solid transparent;
	font-size: 1rem;
}
.cs-games-search-form button {
	padding: 12px 20px;
	border-radius: var(--cs-radius);
	border: none;
	background: var(--cs-accent);
	color: #fff;
	font-weight: 700;
	cursor: pointer;
}
.cs-games-search-form button:hover { background: #0c8360; }
.cs-games-grid { margin: 32px 0; }
.cs-game-card { position: relative; padding-top: 34px; }

@media (max-width: 480px) {
	.cs-games-search-form { flex-direction: column; }
}

/* ---------- Individual game page (/games/{slug}/) ---------- */
.cs-game-specs { margin: 32px 0; }
.cs-game-specs-table td { font-size: 0.92rem; }
.cs-game-cta {
	margin-top: 20px;
	padding: 18px 20px;
	border-radius: var(--cs-radius);
	background: var(--cs-bg-alt);
	border: 1px solid var(--cs-border);
	text-align: center;
}
.cs-game-cta p { margin: 0 0 12px; font-weight: 600; }
.cs-game-cta-button { display: inline-block; text-decoration: none; }