/**
 * Dragon Theme - Main Stylesheet
 *
 * Design system based on D3 merged layout:
 * - D1 Design Agency hero aesthetics (bold colors, geometric shapes)
 * - D2 Google Blog clean typography and card layout
 *
 * @package Dragon
 * @since   1.0.0
 */

/* ==========================================================================
   0. CSS Custom Properties (Design Tokens)
   ========================================================================== */

:root {
	/* Colors - inspired by D3 */
	--dragon-primary: #1a73e8;
	--dragon-primary-dark: #174ea6;
	--dragon-secondary: #202124;
	--dragon-accent-blue: #0f1b61;
	--dragon-accent-yellow: #f5c518;
	--dragon-accent-green: #34a853;
	--dragon-accent-red: #ea4335;

	/* Neutrals */
	--dragon-white: #ffffff;
	--dragon-gray-50: #f8f9fa;
	--dragon-gray-100: #f1f3f4;
	--dragon-gray-200: #e8eaed;
	--dragon-gray-300: #dadce0;
	--dragon-gray-500: #5f6368;
	--dragon-gray-700: #3c4043;
	--dragon-gray-900: #202124;

	/* Typography */
	--dragon-font-family: 'Inter', 'Google Sans', system-ui, -apple-system, sans-serif;
	--dragon-font-mono: 'Roboto Mono', monospace;

	/* Font sizes */
	--dragon-text-xs: 0.75rem;
	--dragon-text-sm: 0.875rem;
	--dragon-text-base: 1rem;
	--dragon-text-lg: 1.125rem;
	--dragon-text-xl: 1.25rem;
	--dragon-text-2xl: 1.5rem;
	--dragon-text-3xl: 2rem;
	--dragon-text-4xl: 2.5rem;
	--dragon-text-5xl: 3.5rem;

	/* Spacing */
	--dragon-space-xs: 0.25rem;
	--dragon-space-sm: 0.5rem;
	--dragon-space-md: 1rem;
	--dragon-space-lg: 1.5rem;
	--dragon-space-xl: 2rem;
	--dragon-space-2xl: 3rem;
	--dragon-space-3xl: 4rem;
	--dragon-space-4xl: 5rem;

	/* Layout */
	--dragon-container: 1260px;
	--dragon-container-narrow: 800px;
	--dragon-gutter: 1rem;

	/* Borders */
	--dragon-radius-sm: 4px;
	--dragon-radius-md: 8px;
	--dragon-radius-lg: 12px;
	--dragon-radius-full: 9999px;

	/* Shadows */
	--dragon-shadow-sm: 0 1px 2px rgba(60, 64, 67, 0.1);
	--dragon-shadow-md: 0 2px 6px rgba(60, 64, 67, 0.15);
	--dragon-shadow-lg: 0 6px 10px 4px rgba(60, 64, 67, 0.15), 0 2px 3px rgba(60, 64, 67, 0.3);

	/* Transitions */
	--dragon-transition: 0.2s ease;
	--dragon-transition-slow: 0.3s ease;
}

/* ==========================================================================
   1. Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
	box-sizing: border-box;
}

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

body {
	margin: 0;
	padding: 0;
	font-family: var(--dragon-font-family);
	font-size: var(--dragon-text-base);
	font-weight: 400;
	line-height: 1.625;
	color: var(--dragon-gray-700);
	background-color: var(--dragon-white);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

img {
	max-width: 100%;
	height: auto;
	display: block;
	border: 0;
}

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

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

a:focus-visible {
	outline: 2px solid var(--dragon-primary);
	outline-offset: 2px;
	border-radius: var(--dragon-radius-sm);
}

h1, h2, h3, h4, h5, h6 {
	margin: 0 0 var(--dragon-space-md);
	font-family: var(--dragon-font-family);
	font-weight: 400;
	line-height: 1.25;
	color: var(--dragon-gray-900);
}

h1 { font-size: var(--dragon-text-4xl); }
h2 { font-size: var(--dragon-text-3xl); }
h3 { font-size: var(--dragon-text-2xl); }

p {
	margin: 0 0 var(--dragon-space-md);
}

ul, ol {
	margin: 0;
	padding: 0;
	list-style: none;
}

/* ==========================================================================
   2. Accessibility
   ========================================================================== */

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

.screen-reader-text:focus {
	clip: auto;
	background-color: var(--dragon-gray-50);
	border-radius: var(--dragon-radius-sm);
	box-shadow: var(--dragon-shadow-md);
	color: var(--dragon-gray-900);
	display: block;
	font-size: var(--dragon-text-sm);
	font-weight: 600;
	height: auto;
	left: 5px;
	line-height: normal;
	padding: 15px 23px 14px;
	text-decoration: none;
	top: 5px;
	width: auto;
	z-index: 100000;
}

.dragon-skip-link:focus {
	clip: auto;
	position: fixed;
	top: var(--dragon-space-sm);
	left: var(--dragon-space-sm);
	z-index: 100001;
	background: var(--dragon-primary);
	color: var(--dragon-white);
	padding: var(--dragon-space-sm) var(--dragon-space-md);
	border-radius: var(--dragon-radius-sm);
	font-weight: 500;
	width: auto;
	height: auto;
}

/* ==========================================================================
   3. Header
   ========================================================================== */

.dragon-header {
	position: sticky;
	top: 0;
	z-index: 1000;
	background: var(--dragon-white);
	border-bottom: 1px solid var(--dragon-gray-200);
	transition: box-shadow var(--dragon-transition);
}

.dragon-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	max-width: var(--dragon-container);
	margin: 0 auto;
	padding: 0 var(--dragon-gutter);
	height: 64px;
}

.dragon-header__brand a,
.dragon-header__site-title {
	font-size: var(--dragon-text-xl);
	font-weight: 600;
	color: var(--dragon-gray-900);
	text-decoration: none;
	display: flex;
	align-items: center;
	gap: var(--dragon-space-sm);
}

.dragon-header__brand .custom-logo {
	max-height: 40px;
	width: auto;
}

/* Hamburger Toggle */
.dragon-header__toggle {
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 40px;
	height: 40px;
	padding: 8px;
	background: none;
	border: none;
	cursor: pointer;
	border-radius: var(--dragon-radius-sm);
	transition: background var(--dragon-transition);
}

.dragon-header__toggle:hover {
	background: var(--dragon-gray-100);
}

.dragon-header__toggle-bar {
	display: block;
	width: 100%;
	height: 2px;
	background: var(--dragon-gray-700);
	border-radius: 1px;
	transition: transform var(--dragon-transition-slow), opacity var(--dragon-transition);
}

.dragon-header__toggle[aria-expanded="true"] .dragon-header__toggle-bar:nth-child(1) {
	transform: rotate(45deg) translate(5px, 5px);
}
.dragon-header__toggle[aria-expanded="true"] .dragon-header__toggle-bar:nth-child(2) {
	opacity: 0;
}
.dragon-header__toggle[aria-expanded="true"] .dragon-header__toggle-bar:nth-child(3) {
	transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation */
.dragon-nav {
	display: none;
}

.dragon-nav--open {
	display: block;
	position: fixed;
	top: 64px;
	left: 0;
	right: 0;
	bottom: 0;
	background: var(--dragon-white);
	padding: var(--dragon-space-xl) var(--dragon-gutter);
	overflow-y: auto;
	animation: dragon-slideDown 0.3s ease;
}

@keyframes dragon-slideDown {
	from { opacity: 0; transform: translateY(-10px); }
	to { opacity: 1; transform: translateY(0); }
}

.dragon-nav__list {
	display: flex;
	flex-direction: column;
	gap: 0;
}

.dragon-nav__list .menu-item a {
	display: block;
	padding: var(--dragon-space-md) 0;
	font-size: var(--dragon-text-lg);
	font-weight: 500;
	color: var(--dragon-gray-700);
	border-bottom: 1px solid var(--dragon-gray-200);
	transition: color var(--dragon-transition);
}

.dragon-nav__list .menu-item a:hover {
	color: var(--dragon-primary);
}

.dragon-nav__list .sub-menu {
	padding-left: var(--dragon-space-xl);
}

.dragon-nav__list .sub-menu .menu-item a {
	font-size: var(--dragon-text-base);
	font-weight: 400;
}

.dragon-nav__submenu-toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 32px;
	height: 32px;
	background: none;
	border: none;
	cursor: pointer;
	border-radius: var(--dragon-radius-sm);
	vertical-align: middle;
	transition: transform var(--dragon-transition);
}

.dragon-nav__item--open > .dragon-nav__submenu-toggle {
	transform: rotate(180deg);
}

.dragon-nav__item--open > .sub-menu {
	display: block;
}

.menu-item-has-children > .sub-menu {
	display: none;
}

body.dragon-nav-open {
	overflow: hidden;
}

/* Desktop Navigation */
@media (min-width: 1024px) {
	.dragon-header__toggle {
		display: none;
	}

	.dragon-nav {
		display: block;
		position: static;
	}

	.dragon-nav__list {
		flex-direction: row;
		gap: var(--dragon-space-xs);
	}

	.dragon-nav__list .menu-item a {
		padding: var(--dragon-space-sm) var(--dragon-space-md);
		font-size: var(--dragon-text-sm);
		font-weight: 500;
		border-bottom: none;
		border-radius: var(--dragon-radius-full);
	}

	.dragon-nav__list .menu-item a:hover {
		background: var(--dragon-gray-100);
	}

	.dragon-nav__submenu-toggle {
		display: none;
	}

	.menu-item-has-children {
		position: relative;
	}

	.menu-item-has-children > .sub-menu {
		display: none;
		position: absolute;
		top: 100%;
		left: 0;
		min-width: 220px;
		background: var(--dragon-white);
		border-radius: var(--dragon-radius-md);
		box-shadow: var(--dragon-shadow-lg);
		padding: var(--dragon-space-sm) 0;
		z-index: 100;
	}

	.menu-item-has-children:hover > .sub-menu {
		display: block;
		animation: dragon-slideDown 0.2s ease;
	}

	.menu-item-has-children > .sub-menu .menu-item a {
		padding: var(--dragon-space-sm) var(--dragon-space-lg);
		border-radius: 0;
		font-size: var(--dragon-text-sm);
	}
}

/* ==========================================================================
   4. Main Content
   ========================================================================== */

.dragon-main__inner {
	max-width: var(--dragon-container);
	margin: 0 auto;
	padding: var(--dragon-space-2xl) var(--dragon-gutter);
}

.dragon-page-header {
	margin-bottom: var(--dragon-space-2xl);
}

.dragon-page-header__title {
	font-size: var(--dragon-text-3xl);
	font-weight: 400;
}

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

@media (min-width: 768px) {
	.dragon-archive__grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (min-width: 1024px) {
	.dragon-archive__grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

/* Pagination */
.nav-links {
	display: flex;
	justify-content: center;
	gap: var(--dragon-space-sm);
	margin-top: var(--dragon-space-3xl);
	flex-wrap: wrap;
}

.nav-links .page-numbers {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 40px;
	height: 40px;
	padding: 0 var(--dragon-space-sm);
	border-radius: var(--dragon-radius-full);
	font-size: var(--dragon-text-sm);
	font-weight: 500;
	color: var(--dragon-gray-700);
	transition: background var(--dragon-transition), color var(--dragon-transition);
}

.nav-links .page-numbers:hover {
	background: var(--dragon-gray-100);
}

.nav-links .page-numbers.current {
	background: var(--dragon-primary);
	color: var(--dragon-white);
}

/* ==========================================================================
   5. Post Cards (Google Blog Style)
   ========================================================================== */

.dragon-card {
	border-radius: var(--dragon-radius-md);
	overflow: hidden;
	transition: box-shadow var(--dragon-transition-slow);
}

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

.dragon-card__link {
	display: block;
	color: inherit;
	text-decoration: none;
	height: 100%;
}

.dragon-card__link:hover {
	color: inherit;
}

.dragon-card__link:focus-visible {
	outline: 2px solid var(--dragon-primary);
	outline-offset: 2px;
	border-radius: var(--dragon-radius-md);
}

.dragon-card__image {
	aspect-ratio: 16 / 9;
	overflow: hidden;
	border-radius: var(--dragon-radius-md);
	margin-bottom: var(--dragon-space-md);
}

.dragon-card__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--dragon-transition-slow);
}

.dragon-card:hover .dragon-card__img {
	transform: scale(1.03);
}

.dragon-card__img-placeholder {
	width: 100%;
	height: 100%;
	background: linear-gradient(135deg, var(--dragon-gray-100), var(--dragon-gray-200));
}

.dragon-card__body {
	padding: 0 var(--dragon-space-xs) var(--dragon-space-lg);
}

.dragon-card__eyebrow {
	display: inline-block;
	font-size: var(--dragon-text-sm);
	font-weight: 500;
	color: var(--dragon-primary);
	text-transform: uppercase;
	letter-spacing: 0.025em;
	margin-bottom: var(--dragon-space-sm);
}

.dragon-card__title {
	font-size: var(--dragon-text-xl);
	font-weight: 400;
	line-height: 1.4;
	color: var(--dragon-gray-900);
	margin-bottom: var(--dragon-space-sm);
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.dragon-card:hover .dragon-card__title {
	text-decoration: underline;
}

.dragon-card__excerpt {
	font-size: var(--dragon-text-sm);
	color: var(--dragon-gray-500);
	line-height: 1.6;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
	margin-bottom: var(--dragon-space-sm);
}

.dragon-card__meta {
	display: flex;
	align-items: center;
	gap: var(--dragon-space-md);
	font-size: var(--dragon-text-xs);
	color: var(--dragon-gray-500);
}

/* ==========================================================================
   6. Footer
   ========================================================================== */

.dragon-footer {
	background: var(--dragon-gray-50);
	margin-top: auto;
}

.dragon-footer__inner {
	max-width: var(--dragon-container);
	margin: 0 auto;
	padding: 0 var(--dragon-gutter);
}

.dragon-footer__upper {
	padding: var(--dragon-space-3xl) 0 var(--dragon-space-xl);
}

.dragon-footer__upper .dragon-footer__inner {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: var(--dragon-space-xl);
}

.dragon-footer__nav .dragon-footer__menu {
	display: flex;
	flex-wrap: wrap;
	gap: var(--dragon-space-lg);
}

.dragon-footer__nav .dragon-footer__menu li a {
	font-size: var(--dragon-text-sm);
	color: var(--dragon-gray-500);
	transition: color var(--dragon-transition);
}

.dragon-footer__nav .dragon-footer__menu li a:hover {
	color: var(--dragon-gray-900);
}

.dragon-footer__social {
	display: flex;
	align-items: center;
	gap: var(--dragon-space-lg);
}

.dragon-footer__social-title {
	font-size: var(--dragon-text-sm);
	font-weight: 500;
	color: var(--dragon-gray-700);
}

.dragon-footer__social-list {
	display: flex;
	gap: var(--dragon-space-lg);
}

.dragon-footer__social-link {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 24px;
	height: 24px;
	color: var(--dragon-gray-700);
	transition: color var(--dragon-transition);
}

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

.dragon-footer__lower {
	border-top: 1px solid var(--dragon-gray-300);
	padding: var(--dragon-space-lg) 0;
}

.dragon-footer__copyright {
	font-size: var(--dragon-text-sm);
	color: var(--dragon-gray-500);
	margin: 0;
}

.dragon-footer__copyright a {
	color: var(--dragon-gray-500);
}

.dragon-footer__copyright a:hover {
	color: var(--dragon-gray-900);
}

/* ==========================================================================
   7. No Results
   ========================================================================== */

.dragon-no-results {
	text-align: center;
	padding: var(--dragon-space-4xl) var(--dragon-gutter);
}

.dragon-no-results__title {
	font-size: var(--dragon-text-3xl);
	margin-bottom: var(--dragon-space-lg);
}

.dragon-no-results__content p {
	color: var(--dragon-gray-500);
	margin-bottom: var(--dragon-space-xl);
}

.dragon-no-results .search-form {
	display: flex;
	justify-content: center;
	max-width: 400px;
	margin: 0 auto;
}

/* ==========================================================================
   8. Search Form
   ========================================================================== */

.search-form {
	display: flex;
	gap: var(--dragon-space-sm);
}

.search-form .search-field {
	flex: 1;
	padding: var(--dragon-space-sm) var(--dragon-space-md);
	border: 1px solid var(--dragon-gray-300);
	border-radius: var(--dragon-radius-md);
	font-family: var(--dragon-font-family);
	font-size: var(--dragon-text-base);
	outline: none;
	transition: border-color var(--dragon-transition);
}

.search-form .search-field:focus {
	border-color: var(--dragon-primary);
}

.search-form .search-submit {
	padding: var(--dragon-space-sm) var(--dragon-space-lg);
	background: var(--dragon-primary);
	color: var(--dragon-white);
	border: none;
	border-radius: var(--dragon-radius-md);
	font-family: var(--dragon-font-family);
	font-size: var(--dragon-text-base);
	font-weight: 500;
	cursor: pointer;
	transition: background var(--dragon-transition);
}

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

/* ==========================================================================
   9. Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
		scroll-behavior: auto !important;
	}
}