/* ==========================================================================
   Apple-inspired Design System
   Clean, minimal, with elegant typography and subtle animations
   ========================================================================== */

:root {
	/* Apple-inspired color palette */
	--color-primary: #0071e3;
	--color-primary-hover: #0077ed;
	--color-secondary: #86868b;
	--color-text: #1d1d1f;
	--color-text-muted: #6e6e73;
	--color-background: #ffffff;
	--color-background-secondary: #fbfbfd;
	--color-background-tertiary: #f5f5f7;
	--color-border: #d2d2d7;
	--color-border-light: #e8e8ed;
	--color-success: #34c759;
	--color-warning: #ff9f0a;
	--color-error: #ff3b30;

	/* Typography */
	--font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
	--font-weight-regular: 400;
	--font-weight-medium: 500;
	--font-weight-semibold: 600;
	--font-weight-bold: 700;

	/* Font sizes - fluid and responsive */
	--font-size-base: 1.0625rem;        /* 17px - improved readability */
	--font-size-sm: 0.9375rem;          /* 15px */
	--font-size-xs: 0.875rem;           /* 14px */
	--font-size-lg: 1.1875rem;          /* 19px */
	--font-size-xl: 1.375rem;           /* 22px */
	--font-size-h1: clamp(2.25rem, 5vw, 3.5rem);   /* 36px-56px - responsive */
	--font-size-h2: clamp(1.875rem, 4vw, 2.5rem);  /* 30px-40px */
	--font-size-h3: clamp(1.5rem, 3vw, 2rem);      /* 24px-32px */
	--font-size-h4: clamp(1.25rem, 2.5vw, 1.5rem); /* 20px-24px */
	--font-size-h5: 1.125rem;           /* 18px */
	--font-size-h6: 1rem;               /* 16px */

	/* Line heights for better readability */
	--line-height-base: 1.6;
	--line-height-tight: 1.3;
	--line-height-loose: 1.8;

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

	/* Border radius */
	--radius-sm: 8px;
	--radius-md: 12px;
	--radius-lg: 18px;
	--radius-xl: 22px;

	/* Shadows */
	--shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
	--shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
	--shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

	/* Transitions */
	--transition-fast: 0.15s ease;
	--transition-normal: 0.25s ease;
	--transition-slow: 0.4s ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
	:root {
		--color-primary: #2997ff;
		--color-primary-hover: #47a9ff;
		--color-secondary: #a1a1a6;
		--color-text: #f5f5f7;
		--color-text-muted: #a1a1a6;
		--color-background: #000000;
		--color-background-secondary: #161617;
		--color-background-tertiary: #1d1d1f;
		--color-border: #424245;
		--color-border-light: #2d2d2d;
	}

	body {
		background-color: var(--color-background);
	}

	.navbar-dark {
		background-color: rgba(0, 0, 0, 0.8) !important;
	}

	.bg-light {
		background-color: var(--color-background-tertiary) !important;
	}

	.bg-dark {
		background-color: var(--color-background-tertiary) !important;
	}

	.text-dark {
		color: var(--color-text) !important;
	}

	.form-control {
		background-color: var(--color-background-secondary);
		border-color: var(--color-border);
		color: var(--color-text);
	}
}

html {
	position: relative;
	min-height: 100%;
	scroll-behavior: smooth;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body {
	font-family: var(--font-family);
	font-size: var(--font-size-base);
	font-weight: var(--font-weight-regular);
	color: var(--color-text);
	background-color: var(--color-background);
	padding-top: 56px;
	margin-bottom: 100px;
	line-height: var(--line-height-base);
	letter-spacing: -0.022em;
}

/* Skip link for accessibility */
.skip-link {
	position: absolute;
	top: -40px;
	left: 0;
	background: var(--color-primary);
	color: #fff;
	padding: 8px 16px;
	z-index: 9999;
	transition: top var(--transition-normal);
	border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
	top: 0;
}

section {
	padding: 80px 0;
}

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

/* Links */
a {
	color: var(--color-primary);
	text-decoration: none;
	transition: color var(--transition-fast), opacity var(--transition-fast);
}

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

a:focus {
	outline: 2px solid var(--color-primary);
	outline-offset: 2px;
	border-radius: 4px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
	font-weight: var(--font-weight-semibold);
	letter-spacing: -0.022em;
	color: var(--color-text);
}

h1.title {
	font-size: var(--font-size-h1);
	line-height: var(--line-height-tight);
	font-weight: var(--font-weight-bold);
	margin-bottom: 1.5rem;
}

h2.title {
	font-size: var(--font-size-h2);
	line-height: var(--line-height-tight);
	font-weight: var(--font-weight-semibold);
	margin-bottom: 1rem;
}

h2.title a {
	color: var(--color-text);
	text-decoration: none;
	transition: color var(--transition-fast);
}

h2.title a:hover {
	color: var(--color-primary);
}

/* Code blocks */
pre,
code {
	background: var(--color-background-tertiary);
	color: var(--color-text);
	font-family: "SF Mono", SFMono-Regular, ui-monospace, Menlo, Monaco, monospace;
	font-size: var(--font-size-sm);
	border-radius: var(--radius-sm);
}

pre {
	padding: var(--spacing-md);
	overflow-x: auto;
	border: 1px solid var(--color-border-light);
}

code {
	display: inline-block;
	padding: 0.125em 0.5em;
	line-height: 1.5;
}

/* Tables */
table {
	empty-cells: show;
	border: 1px solid var(--color-border-light);
	width: 100%;
	font-size: var(--font-size-base);
	margin-bottom: var(--spacing-md);
	border-collapse: collapse;
	border-radius: var(--radius-md);
	overflow: hidden;
}

thead {
	background-color: var(--color-background-tertiary);
	color: var(--color-text);
	text-align: left;
	vertical-align: bottom;
	font-weight: var(--font-weight-medium);
}

tr {
	display: table-row;
	vertical-align: inherit;
	border-color: inherit;
}

tbody tr:nth-child(even) {
	background-color: var(--color-background-secondary);
}

tbody tr:hover {
	background-color: var(--color-background-tertiary);
}

th,
td {
	padding: 0.75em 1em;
	border-bottom: 1px solid var(--color-border-light);
}

/* Blockquote */
blockquote {
	padding: var(--spacing-md) var(--spacing-lg);
	margin: var(--spacing-lg) 0;
	border-left: 4px solid var(--color-primary);
	font-style: italic;
	background-color: var(--color-background-secondary);
	border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
	color: var(--color-text-muted);
}

.bi {
	margin-right: 0.5rem !important;
}

/* Buttons */
.btn {
	font-weight: var(--font-weight-medium);
	border-radius: var(--radius-xl);
	padding: 0.5rem 1.25rem;
	transition: all var(--transition-fast);
	border: none;
}

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

.btn-primary:hover {
	background: var(--color-primary-hover);
	transform: scale(1.02);
}

.btn-outline-primary {
	background: transparent;
	color: var(--color-primary);
	border: 1.5px solid var(--color-primary);
}

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

.btn:focus {
	box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.3);
}

/* Paginator */
.paginator {
	margin-top: var(--spacing-2xl);
	margin-bottom: var(--spacing-3xl);
}

.paginator .pagination {
	gap: var(--spacing-sm);
}

.paginator .page-item .page-link {
	border: none;
	background: var(--color-background-tertiary);
	color: var(--color-text);
	border-radius: var(--radius-xl);
	padding: 0.5rem 1rem;
	font-weight: var(--font-weight-medium);
	transition: all var(--transition-fast);
}

.paginator .page-item .page-link:hover {
	background: var(--color-primary);
	color: #fff;
}

.paginator .page-item.disabled .page-link {
	background: var(--color-background-secondary);
	color: var(--color-text-muted);
}

.paginator .page-link:focus {
	box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.3);
}

/* ==========================================================================
   Navbar - Apple style frosted glass effect
   ========================================================================== */

.navbar {
	transition: background-color var(--transition-normal);
	backdrop-filter: saturate(180%) blur(20px);
	-webkit-backdrop-filter: saturate(180%) blur(20px);
	background-color: rgba(29, 29, 31, 0.8) !important;
}

.navbar-brand {
	font-weight: var(--font-weight-semibold);
	font-size: var(--font-size-h4);
	letter-spacing: -0.01em;
}

img.nav-svg-icon {
	width: 1rem;
	height: 1rem;
	padding-bottom: 2px;
	transition: opacity var(--transition-fast);
	filter: brightness(0) invert(1);
}

img.nav-svg-icon:hover {
	opacity: 0.7;
}

.nav-link {
	font-size: var(--font-size-sm);
	font-weight: var(--font-weight-medium);
	letter-spacing: 0.02em;
	transition: color var(--transition-fast);
	padding: 0.5rem 0.75rem !important;
}

.nav-item.active .nav-link {
	font-weight: var(--font-weight-semibold);
}

/* ==========================================================================
   Footer
   ========================================================================== */

footer.footer {
	position: absolute;
	bottom: 0;
	width: 100%;
	min-height: 60px;
	padding: var(--spacing-lg) 0;
	font-size: 0.75rem;
	background-color: var(--color-background-tertiary) !important;
	color: var(--color-text-muted);
}

footer.footer.bg-dark {
	background-color: var(--color-background-tertiary) !important;
}

footer.footer .text-white {
	color: var(--color-text-muted) !important;
}

footer.footer a {
	color: var(--color-primary) !important;
}

footer.footer a:hover {
	color: var(--color-primary-hover) !important;
}

.mini-logo {
	height: 18px;
	padding-bottom: 3px;
	opacity: 0.8;
}

/* ==========================================================================
   Hero Section - Clean Modern Header
   ========================================================================== */

.hero {
	padding: 100px 0 60px;
	background: var(--color-background-secondary);
}

.hero-content {
	max-width: 680px;
	margin: 0 auto;
	text-align: center;
}

.hero-title {
	font-size: var(--font-size-h1);
	font-weight: var(--font-weight-bold);
	color: var(--color-text);
	margin-bottom: var(--spacing-sm);
	letter-spacing: -0.02em;
	line-height: var(--line-height-tight);
}

.hero-subtitle {
	color: var(--color-text-secondary);
	font-size: var(--font-size-lg);
	font-weight: var(--font-weight-regular);
	line-height: var(--line-height-base);
	margin: 0 auto;
	max-width: 500px;
}

.hero-search {
	margin-top: var(--spacing-xl);
}

.search-input-wrapper {
	position: relative;
	max-width: 320px;
	margin: 0 auto;
}

.search-icon {
	position: absolute;
	left: 14px;
	top: 50%;
	transform: translateY(-50%);
	color: var(--color-text-muted);
	pointer-events: none;
}

.hero-search .form-control {
	border-radius: var(--radius-full);
	border: 1px solid var(--color-border);
	padding: 0.75rem 1rem 0.75rem 42px;
	font-size: var(--font-size-base);
	transition: all var(--transition-fast);
	background-color: var(--color-background-secondary);
	width: 100%;
}

.hero-search .form-control:focus {
	border-color: var(--color-primary);
	box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
	background-color: var(--color-background);
}

.hero-search .form-control::placeholder {
	color: var(--color-text-muted);
}

@media (min-width: 768px) {
	.hero {
		padding: 120px 0 80px;
	}

	.hero-subtitle {
		font-size: var(--font-size-xl);
	}
}

/* ==========================================================================
   Search form (for non-hero contexts)
   ========================================================================== */

.search-form .form-control {
	border-radius: var(--radius-lg);
	border: 1px solid var(--color-border);
	padding: 0.625rem 1rem;
	font-size: var(--font-size-base);
	transition: all var(--transition-fast);
	background-color: var(--color-background);
}

.search-form .form-control:focus {
	border-color: var(--color-primary);
	box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.15);
}

.search-form .btn {
	border-radius: var(--radius-lg);
}

/* ==========================================================================
   Home - Articles List
   ========================================================================== */

article.home-page {
	padding: var(--spacing-2xl) 0;
	border-bottom: 1px solid var(--color-border-light);
	position: relative;
	background: var(--color-background);
}

article.home-page:nth-child(even) {
	background: var(--color-background);
}

article.home-page:last-child {
	border-bottom: none;
}

article.home-page header {
	margin-bottom: var(--spacing-sm);
}

article.home-page h2.title {
	margin-bottom: var(--spacing-xs);
}

/* Fix: Article footer should not be positioned absolutely */
article.home-page footer.mt-3 {
	position: static;
	background: transparent !important;
	padding: 0;
	min-height: auto;
	width: auto;
	margin-top: var(--spacing-md) !important;
}

article.home-page footer.mt-3 small {
	font-size: var(--font-size-sm);
	color: var(--color-text-muted);
}

/* ==========================================================================
   Page article styles
   ========================================================================== */

article.page {
	padding: var(--spacing-2xl) 0;
}

.page-header {
	margin-bottom: var(--spacing-xl);
}

.page-meta {
	font-size: var(--font-size-base);
	color: var(--color-text-muted);
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-md);
}

.page-meta span {
	display: inline-flex;
	align-items: center;
}

.page-cover-image-wrapper {
	margin-bottom: var(--spacing-xl);
}

.page-cover-image {
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-lg);
}

.page-description {
	color: var(--color-text-muted);
	font-size: var(--font-size-lg);
	line-height: var(--line-height-loose);
	margin-bottom: var(--spacing-lg);
}

.page-content {
	font-size: var(--font-size-base);
	line-height: var(--line-height-loose);
}

.page-content img {
	border-radius: var(--radius-md);
	margin: var(--spacing-lg) 0;
	box-shadow: var(--shadow-sm);
}

.page-content p {
	margin-bottom: var(--spacing-lg);
}

.page-content h2,
.page-content h3,
.page-content h4 {
	margin-top: var(--spacing-2xl);
	margin-bottom: var(--spacing-md);
}

.page-excerpt {
	color: var(--color-text);
	line-height: var(--line-height-base);
}

/* ==========================================================================
   VIDEO EMBED RESPONSIVE
   ========================================================================== */

.video-embed {
	overflow: hidden;
	padding-bottom: 56.25%;
	position: relative;
	height: 0;
	margin: var(--spacing-lg) 0;
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-md);
}

.video-embed iframe {
	left: 0;
	top: 0;
	height: 100%;
	width: 100%;
	position: absolute;
	border: none;
}

/* ==========================================================================
   Screen reader only - for accessibility
   ========================================================================== */

.sr-only {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

.sr-only-focusable:focus {
	position: static;
	width: auto;
	height: auto;
	padding: inherit;
	margin: inherit;
	overflow: visible;
	clip: auto;
	white-space: normal;
}

/* ==========================================================================
   Print styles
   ========================================================================== */

@media print {
	.navbar,
	footer.footer,
	.paginator,
	.btn,
	.search-form {
		display: none !important;
	}

	body {
		padding-top: 0;
		margin-bottom: 0;
		color: #000;
		background: #fff;
	}

	article.page,
	article.home-page {
		padding: 0;
	}

	a {
		color: #000;
		text-decoration: underline;
	}
}

/* ==========================================================================
   Reduce motion for users who prefer it
   ========================================================================== */

@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;
	}
}

/* ==========================================================================
   Utility classes
   ========================================================================== */

.text-muted {
	color: var(--color-text-muted) !important;
}

.text-primary {
	color: var(--color-primary) !important;
}

/* ==========================================================================
   Breadcrumb Navigation (SEO)
   ========================================================================== */

.breadcrumb-nav {
	padding: var(--spacing-md) 0;
	background-color: var(--color-background-secondary);
	border-bottom: 1px solid var(--color-border-light);
}

.breadcrumb {
	font-size: var(--font-size-sm);
	margin-bottom: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
	content: "›";
	color: var(--color-text-muted);
}

.breadcrumb-item a {
	color: var(--color-primary);
	text-decoration: none;
}

.breadcrumb-item a:hover {
	text-decoration: underline;
}

.breadcrumb-item.active {
	color: var(--color-text-muted);
}

/* ==========================================================================
   Article Footer Fix (not the main footer)
   ========================================================================== */

.article-footer,
article.home-page footer.article-footer {
	position: static !important;
	background: transparent !important;
	padding: 0 !important;
	min-height: auto !important;
	width: auto !important;
	font-size: inherit !important;
}