/* ==========================================================================
   Technical Theme - Main Stylesheet
   Mobile-first, CSS Custom Properties, BEM
   ========================================================================== */

/* --------------------------------------------------------------------------
   Custom Properties
   -------------------------------------------------------------------------- */
:root {
	/* Colors */
	--color-primary: #1a56db;
	--color-primary-dark: #1444b0;
	--color-text: #1f2937;
	--color-text-light: #6b7280;
	--color-bg: #ffffff;
	--color-bg-alt: #f9fafb;
	--color-border: #e5e7eb;
	--color-link: var(--color-primary);
	--color-link-hover: var(--color-primary-dark);

	/* Typography */
	--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--font-size-base: 1rem;
	--font-size-sm: 0.875rem;
	--font-size-lg: 1.125rem;
	--font-size-xl: 1.5rem;
	--font-size-2xl: 2rem;
	--font-size-3xl: 2.5rem;
	--line-height: 1.65;

	/* Spacing */
	--space-xs: 0.25rem;
	--space-sm: 0.5rem;
	--space-md: 1rem;
	--space-lg: 1.5rem;
	--space-xl: 2rem;
	--space-2xl: 3rem;
	--space-3xl: 4rem;

	/* Layout */
	--container-max: 1200px;
	--container-narrow: 720px;
	--container-padding: 1rem;

	/* Misc */
	--radius: 6px;
	--shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
	--shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.1);
	--transition: 0.2s ease;
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

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

body {
	font-family: var(--font-family);
	font-size: var(--font-size-base);
	line-height: var(--line-height);
	color: var(--color-text);
	background-color: var(--color-bg);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

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

a {
	color: var(--color-link);
	text-decoration: none;
	transition: color var(--transition);
}

a:hover {
	color: var(--color-link-hover);
}

ul,
ol {
	list-style: none;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
	font-weight: 700;
	line-height: 1.25;
	color: var(--color-text);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
	max-width: var(--container-max);
	margin-left: auto;
	margin-right: auto;
	padding-left: var(--container-padding);
	padding-right: var(--container-padding);
}

.container--narrow {
	max-width: var(--container-narrow);
}

main {
	min-height: 50vh;
	padding-bottom: var(--space-3xl);
}

.section {
	padding-top: var(--space-2xl);
	padding-bottom: var(--space-2xl);
}

.section__title {
	margin-bottom: var(--space-xl);
}

/* --------------------------------------------------------------------------
   Skip Link
   -------------------------------------------------------------------------- */
.skip-link {
	position: absolute;
	top: -100%;
	left: var(--space-md);
	padding: var(--space-sm) var(--space-md);
	background: var(--color-primary);
	color: #fff;
	z-index: 9999;
	border-radius: var(--radius);
	font-size: var(--font-size-sm);
}

.skip-link:focus {
	top: var(--space-sm);
	color: #fff;
}

/* --------------------------------------------------------------------------
   Visually Hidden
   -------------------------------------------------------------------------- */
.visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* --------------------------------------------------------------------------
   Site Header
   -------------------------------------------------------------------------- */
.site-header {
	background: var(--color-bg);
	border-bottom: 1px solid var(--color-border);
	position: sticky;
	top: 0;
	z-index: 100;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	min-height: 60px;
	gap: var(--space-md);
}

.site-header__brand {
	flex-shrink: 0;
}

.site-header__logo {
	max-height: 40px;
	width: auto;
}

.site-header__title-link {
	font-size: var(--font-size-lg);
	font-weight: 700;
	color: var(--color-text);
}

.site-header__title-link:hover {
	color: var(--color-primary);
}

/* Mobile toggle */
.site-header__toggle {
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 36px;
	height: 36px;
	padding: 6px;
	background: none;
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	cursor: pointer;
}

.site-header__toggle-bar {
	display: block;
	width: 100%;
	height: 2px;
	background: var(--color-text);
	border-radius: 1px;
	transition: transform var(--transition), opacity var(--transition);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
	opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

/* Nav (mobile: hidden by default) */
.site-header__nav {
	display: none;
	position: absolute;
	top: 100%;
	left: 0;
	right: 0;
	background: var(--color-bg);
	border-bottom: 1px solid var(--color-border);
	padding: var(--space-md) var(--container-padding);
}

.site-header__nav--open {
	display: block;
}

.site-header__menu {
	display: flex;
	flex-direction: column;
	gap: 0;
}

.site-header__menu li a {
	display: block;
	padding: var(--space-sm) 0;
	color: var(--color-text);
	font-size: var(--font-size-base);
	border-bottom: 1px solid var(--color-border);
}

.site-header__menu li:last-child a {
	border-bottom: none;
}

.site-header__menu li a:hover,
.site-header__menu li.current-menu-item > a {
	color: var(--color-primary);
}

/* Sub-menu */
.site-header__menu .sub-menu {
	padding-left: var(--space-lg);
}

.site-header__menu .sub-menu li a {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */
.hero {
	background: var(--color-bg-alt);
	padding: var(--space-2xl) 0;
	border-bottom: 1px solid var(--color-border);
}

.hero__inner {
	display: flex;
	flex-direction: column;
	gap: var(--space-xl);
}

.hero__title {
	font-size: var(--font-size-2xl);
	margin-bottom: var(--space-sm);
}

.hero__description {
	font-size: var(--font-size-lg);
	color: var(--color-text-light);
	max-width: 640px;
}

.hero__contact {
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

.hero__contact-item a {
	color: var(--color-text-light);
}

.hero__contact-item a:hover {
	color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Posts Grid
   -------------------------------------------------------------------------- */
.posts-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--space-xl);
}

/* --------------------------------------------------------------------------
   Post Card
   -------------------------------------------------------------------------- */
.post-card {
	background: var(--color-bg);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	overflow: hidden;
	transition: box-shadow var(--transition);
}

.post-card:hover {
	box-shadow: var(--shadow-lg);
}

.post-card__image-link {
	display: block;
}

.post-card__image {
	width: 100%;
	aspect-ratio: 3 / 2;
	object-fit: cover;
}

.post-card__body {
	padding: var(--space-lg);
}

.post-card__meta {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
	margin-bottom: var(--space-sm);
}

.post-card__title {
	font-size: var(--font-size-lg);
	margin-bottom: var(--space-sm);
	line-height: 1.35;
}

.post-card__title a {
	color: var(--color-text);
}

.post-card__title a:hover {
	color: var(--color-primary);
}

.post-card__excerpt {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
	margin-bottom: var(--space-md);
	line-height: var(--line-height);
}

.post-card__link {
	font-size: var(--font-size-sm);
	font-weight: 600;
}

/* --------------------------------------------------------------------------
   Article (single)
   -------------------------------------------------------------------------- */
.article {
	padding-top: var(--space-xl);
}

.article__featured-image {
	margin-bottom: var(--space-xl);
	border-radius: var(--radius);
	overflow: hidden;
}

.article__featured-image img {
	width: 100%;
}

.article__header {
	margin-bottom: var(--space-xl);
}

.article__title {
	font-size: var(--font-size-2xl);
	margin-bottom: var(--space-md);
}

.article__meta {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm) var(--space-lg);
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

.article__meta a {
	color: var(--color-text-light);
}

.article__meta a:hover {
	color: var(--color-primary);
}

/* Article content */
.article__content {
	font-size: var(--font-size-base);
	line-height: 1.75;
}

.article__content > * + * {
	margin-top: var(--space-lg);
}

.article__content h2 {
	margin-top: var(--space-2xl);
	font-size: var(--font-size-xl);
}

.article__content h3 {
	margin-top: var(--space-xl);
	font-size: var(--font-size-lg);
}

.article__content ul,
.article__content ol {
	padding-left: var(--space-xl);
}

.article__content ul {
	list-style: disc;
}

.article__content ol {
	list-style: decimal;
}

.article__content li + li {
	margin-top: var(--space-xs);
}

.article__content blockquote {
	border-left: 4px solid var(--color-primary);
	padding: var(--space-md) var(--space-lg);
	background: var(--color-bg-alt);
	font-style: italic;
	color: var(--color-text-light);
}

.article__content img {
	border-radius: var(--radius);
}

.article__content a {
	text-decoration: underline;
}

.article__content pre {
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	padding: var(--space-lg);
	overflow-x: auto;
	font-size: var(--font-size-sm);
}

.article__content code {
	background: var(--color-bg-alt);
	padding: 0.15em 0.35em;
	border-radius: 3px;
	font-size: 0.9em;
}

.article__content pre code {
	background: none;
	padding: 0;
}

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

.article__content th,
.article__content td {
	padding: var(--space-sm) var(--space-md);
	border: 1px solid var(--color-border);
	text-align: left;
}

.article__content th {
	background: var(--color-bg-alt);
	font-weight: 600;
}

/* Article footer */
.article__footer {
	margin-top: var(--space-2xl);
	padding-top: var(--space-lg);
	border-top: 1px solid var(--color-border);
}

.article__tags {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-sm);
	font-size: var(--font-size-sm);
}

.article__tags-label {
	font-weight: 600;
	color: var(--color-text-light);
}

.article__tag {
	display: inline-block;
	padding: var(--space-xs) var(--space-sm);
	background: var(--color-bg-alt);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

.article__tag:hover {
	border-color: var(--color-primary);
	color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   Post Navigation
   -------------------------------------------------------------------------- */
.post-nav {
	margin-top: var(--space-2xl);
	padding-top: var(--space-xl);
	border-top: 1px solid var(--color-border);
}

.post-nav .nav-links {
	display: flex;
	flex-direction: column;
	gap: var(--space-lg);
}

.post-nav .nav-previous,
.post-nav .nav-next {
	flex: 1;
}

.post-nav__label {
	display: block;
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
	margin-bottom: var(--space-xs);
}

.post-nav__title {
	font-weight: 600;
}

/* --------------------------------------------------------------------------
   Breadcrumbs
   -------------------------------------------------------------------------- */
.breadcrumbs {
	padding: var(--space-md) 0;
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

.breadcrumbs__list {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--space-xs);
}

.breadcrumbs__separator {
	color: var(--color-border);
	margin: 0 var(--space-xs);
}

.breadcrumbs__item a {
	color: var(--color-text-light);
}

.breadcrumbs__item a:hover {
	color: var(--color-primary);
}

.breadcrumbs__item--current {
	color: var(--color-text);
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
	margin-top: var(--space-2xl);
}

.pagination__list {
	display: flex;
	justify-content: center;
	flex-wrap: wrap;
	gap: var(--space-xs);
}

.pagination__link {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 40px;
	height: 40px;
	padding: 0 var(--space-sm);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	font-size: var(--font-size-sm);
	color: var(--color-text);
	transition: all var(--transition);
}

.pagination__link:hover {
	border-color: var(--color-primary);
	color: var(--color-primary);
}

.pagination__link--current {
	background: var(--color-primary);
	border-color: var(--color-primary);
	color: #fff;
}

.pagination__link--current:hover {
	color: #fff;
}

/* --------------------------------------------------------------------------
   Archive Header
   -------------------------------------------------------------------------- */
.archive-header {
	padding: var(--space-xl) 0 var(--space-lg);
}

.archive-header__title {
	font-size: var(--font-size-2xl);
}

.archive-header__description {
	margin-top: var(--space-sm);
	color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Content None
   -------------------------------------------------------------------------- */
.content-none {
	text-align: center;
	padding: var(--space-3xl) 0;
}

.content-none__title {
	margin-bottom: var(--space-md);
}

.content-none__text {
	color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Search Form
   -------------------------------------------------------------------------- */
.search-form {
	display: flex;
	gap: var(--space-sm);
	margin: var(--space-lg) 0;
}

.search-form .search-field {
	flex: 1;
	padding: var(--space-sm) var(--space-md);
	border: 1px solid var(--color-border);
	border-radius: var(--radius);
	font-size: var(--font-size-base);
	font-family: var(--font-family);
}

.search-form .search-field:focus {
	outline: 2px solid var(--color-primary);
	outline-offset: 2px;
	border-color: var(--color-primary);
}

.search-form .search-submit {
	padding: var(--space-sm) var(--space-lg);
	background: var(--color-primary);
	color: #fff;
	border: none;
	border-radius: var(--radius);
	font-size: var(--font-size-base);
	font-family: var(--font-family);
	cursor: pointer;
	transition: background var(--transition);
}

.search-form .search-submit:hover {
	background: var(--color-primary-dark);
}

/* --------------------------------------------------------------------------
   Button
   -------------------------------------------------------------------------- */
.btn {
	display: inline-block;
	padding: var(--space-sm) var(--space-xl);
	background: var(--color-primary);
	color: #fff;
	border-radius: var(--radius);
	font-weight: 600;
	transition: background var(--transition);
}

.btn:hover {
	background: var(--color-primary-dark);
	color: #fff;
}

/* --------------------------------------------------------------------------
   Site Footer
   -------------------------------------------------------------------------- */
.site-footer {
	background: var(--color-bg-alt);
	border-top: 1px solid var(--color-border);
	padding: var(--space-2xl) 0;
	margin-top: auto;
}

.site-footer__inner {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--space-lg);
	text-align: center;
}

.site-footer__text {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

.site-footer__text p {
	margin: 0;
}

.site-footer__social {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-md);
}

.site-footer__social-link {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
	font-weight: 500;
}

.site-footer__social-link:hover {
	color: var(--color-primary);
}

.site-footer__copy {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Focus Styles
   -------------------------------------------------------------------------- */
:focus-visible {
	outline: 2px solid var(--color-primary);
	outline-offset: 2px;
}

:focus:not(:focus-visible) {
	outline: none;
}

/* --------------------------------------------------------------------------
   WordPress generated classes
   -------------------------------------------------------------------------- */
.alignleft {
	float: left;
	margin-right: var(--space-lg);
	margin-bottom: var(--space-md);
}

.alignright {
	float: right;
	margin-left: var(--space-lg);
	margin-bottom: var(--space-md);
}

.aligncenter {
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.wp-caption {
	max-width: 100%;
}

.wp-caption-text {
	font-size: var(--font-size-sm);
	color: var(--color-text-light);
	margin-top: var(--space-sm);
}

.gallery {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
	gap: var(--space-md);
}

/* --------------------------------------------------------------------------
   WP Admin bar offset
   -------------------------------------------------------------------------- */
.admin-bar .site-header {
	top: 32px;
}

@media screen and (max-width: 782px) {
	.admin-bar .site-header {
		top: 46px;
	}
}

/* ==========================================================================
   Media Queries
   ========================================================================== */

/* --------------------------------------------------------------------------
   Tablet (768px)
   -------------------------------------------------------------------------- */
@media (min-width: 768px) {
	:root {
		--container-padding: 1.5rem;
	}

	h1 { font-size: var(--font-size-3xl); }
	h2 { font-size: var(--font-size-2xl); }

	.hero__inner {
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
	}

	.hero__content {
		flex: 1;
	}

	.hero__contact {
		flex-shrink: 0;
	}

	.hero__title {
		font-size: var(--font-size-3xl);
	}

	.article__title {
		font-size: var(--font-size-3xl);
	}

	.posts-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.post-nav .nav-links {
		flex-direction: row;
	}

	.post-nav .nav-next {
		text-align: right;
	}
}

/* --------------------------------------------------------------------------
   Desktop (1024px)
   -------------------------------------------------------------------------- */
@media (min-width: 1024px) {
	:root {
		--container-padding: 2rem;
	}

	/* Header: inline nav */
	.site-header__toggle {
		display: none;
	}

	.site-header__nav {
		display: block;
		position: static;
		border-bottom: none;
		padding: 0;
	}

	.site-header__menu {
		flex-direction: row;
		align-items: center;
		gap: var(--space-sm);
	}

	.site-header__menu li a {
		padding: var(--space-sm) var(--space-md);
		border-bottom: none;
		font-size: var(--font-size-sm);
	}

	.site-header__menu .sub-menu {
		position: absolute;
		top: 100%;
		left: 0;
		background: var(--color-bg);
		border: 1px solid var(--color-border);
		border-radius: var(--radius);
		box-shadow: var(--shadow-lg);
		padding: var(--space-sm) 0;
		min-width: 200px;
		display: none;
		z-index: 101;
	}

	.site-header__menu li {
		position: relative;
	}

	.site-header__menu li:hover > .sub-menu {
		display: block;
	}

	.site-header__menu .sub-menu li a {
		padding: var(--space-sm) var(--space-lg);
		white-space: nowrap;
	}

	/* Posts grid: 3 columns */
	.posts-grid {
		grid-template-columns: repeat(3, 1fr);
	}
}