/* ==========================================================================
   Eduinfom Theme — Design Tokens & Base
   Mobile-first, glassmorphism, trust-blue palette
   ========================================================================== */

:root {
	/* Colors */
	--color-accent: #2974f0;
	--color-accent-hover: #1a5fd4;
	--color-accent-light: #e8f0fe;
	--color-text: #1a2332;
	--color-text-secondary: #5a6578;
	--color-text-muted: #8b95a5;
	--color-border: rgba(255, 255, 255, 0.6);
	--color-border-subtle: rgba(41, 116, 240, 0.12);

	/* Glass */
	--glass-bg: rgba(255, 255, 255, 0.65);
	--glass-bg-strong: rgba(255, 255, 255, 0.82);
	--glass-blur: 14px;
	--glass-shadow: 0 4px 24px rgba(41, 116, 240, 0.08);
	--glass-shadow-hover: 0 8px 32px rgba(41, 116, 240, 0.12);

	/* Background gradient */
	--bg-gradient: linear-gradient(180deg, #ffffff 0%, #f6f9fc 18%, #eaf1f8 45%, #dce9f4 72%, #cfdff0 100%);
	--bg-gradient-fixed: linear-gradient(180deg, #fafbfd 0%, #eef3f9 30%, #e2ebf5 65%, #d4e3f0 100%);

	/* Typography */
	--font-sans: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
	--font-size-base: 17px;
	--font-size-sm: 14px;
	--font-size-lg: 18px;
	--font-size-xl: 22px;
	--font-size-2xl: 26px;
	--line-height: 1.65;
	--line-height-tight: 1.35;

	/* Spacing */
	--space-xs: 4px;
	--space-sm: 8px;
	--space-md: 16px;
	--space-lg: 24px;
	--space-xl: 32px;
	--space-2xl: 48px;

	/* Layout */
	--container-max: 720px;
	--container-wide: 960px;
	--header-height: 56px;
	--nav-height: 44px;
	--radius-sm: 8px;
	--radius-md: 12px;
	--radius-lg: 16px;
	--radius-xl: 20px;

	/* Touch targets */
	--tap-min: 44px;
}

/* Reset & Base */
*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	-webkit-text-size-adjust: 100%;
	scroll-behavior: smooth;
	min-height: 100%;
	background: var(--bg-gradient-fixed);
	background-attachment: fixed;
}

body {
	margin: 0;
	font-family: var(--font-sans);
	font-size: var(--font-size-base);
	line-height: var(--line-height);
	color: var(--color-text);
	background: transparent;
	min-height: 100vh;
	-webkit-font-smoothing: antialiased;
}

/* Background accent blobs */
body::before,
body::after {
	content: "";
	position: fixed;
	border-radius: 50%;
	pointer-events: none;
	z-index: -1;
}

body::before {
	width: 420px;
	height: 420px;
	top: -120px;
	right: -100px;
	background: radial-gradient(circle, rgba(41, 116, 240, 0.08) 0%, transparent 68%);
}

body::after {
	width: 360px;
	height: 360px;
	bottom: 8%;
	left: -100px;
	background: radial-gradient(circle, rgba(120, 175, 230, 0.1) 0%, transparent 70%);
}

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

a {
	color: var(--color-accent);
	text-decoration: none;
	transition: color 0.2s ease;
}

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

h1, h2, h3, h4, h5, h6 {
	margin: 0 0 var(--space-md);
	line-height: var(--line-height-tight);
	font-weight: 700;
	color: var(--color-text);
}

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

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

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

/* ==========================================================================
   Layout
   ========================================================================== */

.site-wrapper {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

.site-main {
	flex: 1;
	width: 100%;
	max-width: var(--container-max);
	margin: 0 auto;
	padding: var(--space-md);
	padding-bottom: var(--space-2xl);
}

.site-main--wide {
	max-width: var(--container-wide);
}

/* ==========================================================================
   Glass Components
   ========================================================================== */

.glass-card {
	background: var(--glass-bg);
	backdrop-filter: blur(var(--glass-blur));
	-webkit-backdrop-filter: blur(var(--glass-blur));
	border: 1px solid var(--color-border);
	border-radius: var(--radius-lg);
	box-shadow: var(--glass-shadow);
}

.glass-card--strong {
	background: var(--glass-bg-strong);
}

/* ==========================================================================
   Header
   ========================================================================== */

.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: var(--glass-bg-strong);
	backdrop-filter: blur(var(--glass-blur));
	-webkit-backdrop-filter: blur(var(--glass-blur));
	border-bottom: 1px solid var(--color-border-subtle);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-md);
	max-width: var(--container-max);
	margin: 0 auto;
	padding: var(--space-sm) var(--space-md);
	min-height: var(--header-height);
}

.site-branding {
	flex-shrink: 0;
	display: flex;
	align-items: center;
	gap: var(--space-sm);
}

.site-branding .custom-logo-link {
	display: block;
	line-height: 0;
	flex-shrink: 0;
}

.site-branding .custom-logo {
	max-height: 36px;
	width: auto;
}

.site-title--with-logo {
	font-size: var(--font-size-lg);
}

.site-title {
	font-size: var(--font-size-xl);
	font-weight: 800;
	color: var(--color-text);
	letter-spacing: -0.02em;
}

.site-title:hover {
	color: var(--color-accent);
}

/* Search */
.header-search {
	position: relative;
	flex: 1;
	max-width: 280px;
	display: flex;
	justify-content: flex-end;
}

.header-search__toggle {
	display: flex;
	align-items: center;
	justify-content: center;
	width: var(--tap-min);
	height: var(--tap-min);
	padding: 0;
	border: none;
	background: transparent;
	color: var(--color-text-secondary);
	cursor: pointer;
	border-radius: var(--radius-sm);
	transition: background 0.2s, color 0.2s;
}

.header-search__toggle:hover,
.header-search__toggle[aria-expanded="true"] {
	background: var(--color-accent-light);
	color: var(--color-accent);
}

.header-search__form {
	display: none;
	position: absolute;
	top: 100%;
	right: 0;
	margin-top: var(--space-xs);
	width: min(100vw - 32px, 320px);
	z-index: 110;
}

.header-search.is-open .header-search__form {
	display: block;
}

.header-search__form .search-form {
	display: flex;
	gap: var(--space-sm);
	padding: var(--space-sm);
	background: var(--glass-bg-strong);
	backdrop-filter: blur(var(--glass-blur));
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	box-shadow: var(--glass-shadow);
}

.search-form__input {
	flex: 1;
	min-width: 0;
	padding: 12px 16px;
	font-size: var(--font-size-base);
	font-family: inherit;
	border: 1px solid var(--color-border-subtle);
	border-radius: var(--radius-sm);
	background: #fff;
	color: var(--color-text);
	outline: none;
	transition: border-color 0.2s;
}

.search-form__input:focus {
	border-color: var(--color-accent);
}

.search-form__input::placeholder {
	color: var(--color-text-muted);
}

.search-form__submit {
	flex-shrink: 0;
	padding: 12px 20px;
	font-size: var(--font-size-sm);
	font-weight: 600;
	font-family: inherit;
	color: #fff;
	background: var(--color-accent);
	border: none;
	border-radius: var(--radius-sm);
	cursor: pointer;
	min-height: var(--tap-min);
	transition: background 0.2s;
}

.search-form__submit:hover {
	background: var(--color-accent-hover);
}

/* Desktop: always show search inline */
@media (min-width: 640px) {
	.header-search {
		max-width: 360px;
	}

	.header-search__toggle {
		display: none;
	}

	.header-search__form {
		display: block;
		position: static;
		width: 100%;
		margin-top: 0;
	}

	.header-search__form .search-form {
		padding: 0;
		background: transparent;
		border: none;
		box-shadow: none;
		backdrop-filter: none;
	}
}

/* ==========================================================================
   Primary Navigation
   ========================================================================== */

.primary-nav {
	background: var(--glass-bg);
	backdrop-filter: blur(var(--glass-blur));
	-webkit-backdrop-filter: blur(var(--glass-blur));
	border-bottom: 1px solid var(--color-border-subtle);
}

.primary-nav__inner {
	max-width: var(--container-max);
	margin: 0 auto;
	padding: 0 var(--space-md);
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
	scrollbar-width: none;
	display: flex;
	justify-content: center;
}

.primary-nav__inner::-webkit-scrollbar {
	display: none;
}

.primary-nav__list {
	display: flex;
	justify-content: center;
	gap: var(--space-xs);
	padding: var(--space-sm) 0;
	white-space: nowrap;
	margin: 0 auto;
}

.primary-nav__list .menu-item a,
.primary-nav__list a {
	display: inline-block;
	padding: 10px 16px;
	font-size: var(--font-size-sm);
	font-weight: 500;
	color: var(--color-text-secondary);
	border-radius: var(--radius-xl);
	transition: background 0.2s, color 0.2s;
	min-height: var(--tap-min);
	line-height: 1.4;
}

.primary-nav__list .menu-item a:hover,
.primary-nav__list a:hover,
.primary-nav__list .current-menu-item a,
.primary-nav__list .current-cat a {
	background: var(--color-accent-light);
	color: var(--color-accent);
}

/* ==========================================================================
   Featured Categories Box
   ========================================================================== */

.featured-categories {
	margin-bottom: var(--space-lg);
	padding: var(--space-lg);
}

.featured-categories__title {
	font-size: var(--font-size-lg);
	font-weight: 700;
	margin-bottom: var(--space-md);
	color: var(--color-text);
}

.featured-categories .ad-slot {
	margin: 0 0 var(--space-md);
	min-height: 100px;
}

.featured-categories__list {
	display: flex;
	flex-direction: column;
	gap: 0;
}

.featured-categories__item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--space-md) 0;
	border-bottom: 1px solid var(--color-border-subtle);
	min-height: var(--tap-min);
}

.featured-categories__item:last-child {
	border-bottom: none;
	padding-bottom: 0;
}

.featured-categories__item:first-child {
	padding-top: 0;
}

.featured-categories__link {
	display: flex;
	align-items: center;
	justify-content: space-between;
	width: 100%;
	color: var(--color-text);
	font-weight: 500;
	font-size: var(--font-size-base);
}

.featured-categories__link:hover {
	color: var(--color-accent);
}

.featured-categories__arrow {
	flex-shrink: 0;
	color: var(--color-text-muted);
	transition: transform 0.2s, color 0.2s;
}

.featured-categories__link:hover .featured-categories__arrow {
	color: var(--color-accent);
	transform: translateX(4px);
}

/* ==========================================================================
   Post Cards (List)
   ========================================================================== */

.post-list {
	display: flex;
	flex-direction: column;
	gap: var(--space-md);
}

.post-card {
	display: flex;
	gap: var(--space-md);
	padding: var(--space-md);
	transition: box-shadow 0.2s, transform 0.2s;
}

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

.post-card__thumbnail {
	flex-shrink: 0;
	width: 100px;
	height: 100px;
	border-radius: var(--radius-md);
	overflow: hidden;
	background: var(--color-accent-light);
}

.post-card__thumbnail img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.post-card__body {
	flex: 1;
	min-width: 0;
	display: flex;
	flex-direction: column;
	gap: var(--space-sm);
}

.post-card__title {
	font-size: var(--font-size-lg);
	font-weight: 700;
	margin: 0;
	line-height: var(--line-height-tight);
}

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

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

.post-card__excerpt {
	font-size: var(--font-size-sm);
	color: var(--color-text-secondary);
	line-height: 1.5;
	margin: 0;
	display: -webkit-box;
	-webkit-line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.post-meta {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-sm) var(--space-md);
	font-size: 12px;
	color: var(--color-text-muted);
}

.post-meta__item {
	display: inline-flex;
	align-items: center;
	gap: 4px;
}

.post-meta__item svg {
	flex-shrink: 0;
	opacity: 0.7;
}

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

.post-meta__item a:hover {
	color: var(--color-accent);
}

@media (min-width: 640px) {
	.post-card__thumbnail {
		width: 120px;
		height: 120px;
	}

	.post-card__title {
		font-size: var(--font-size-xl);
	}
}

/* ==========================================================================
   Ad Slots
   ========================================================================== */

.ad-slot {
	min-height: 0;
	margin: var(--space-md) 0;
	display: flex;
	align-items: center;
	justify-content: center;
	background: transparent;
	border-radius: var(--radius-sm);
}

.ad-slot:not(.is-ad-filled) {
	margin: 0;
}

.ad-slot.is-ad-filled {
	min-height: 90px;
	background: rgba(255, 255, 255, 0.3);
}

.ad-slot:empty {
	min-height: 0;
	margin: 0;
	background: transparent;
}

.adsense-unit {
	width: 100%;
	text-align: center;
	overflow: hidden;
}

.adsense-unit .adsbygoogle {
	display: block;
	margin: 0 auto;
}

/* Scoreport CTA button */
.single-promo {
	padding: var(--space-md);
	margin-bottom: var(--space-lg);
	overflow: hidden;
}

.single-promo .ad-slot {
	background: transparent;
	min-height: 0;
	margin: 0;
	padding: 0;
	border-radius: 0;
}

.single-promo .ad-slot.is-ad-filled {
	min-height: 90px;
}

.single-promo .ad-slot:empty {
	min-height: 0;
}

.scoreport-cta {
	display: flex;
	justify-content: center;
	align-items: center;
	width: 100%;
	margin: var(--space-sm) 0 0;
	padding: 0;
}

a.button2 {
	display: block;
	width: 100%;
	max-width: 100%;
	margin: 0 auto;
	padding: 12px 8px;
	font-size: 11px;
	font-weight: 700;
	line-height: 1.3;
	color: #fff;
	background: var(--color-accent);
	border-radius: var(--radius-md);
	box-shadow: 0 4px 16px rgba(41, 116, 240, 0.25);
	transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
	text-align: center;
	white-space: nowrap;
	letter-spacing: -0.03em;
}

@media (min-width: 400px) {
	a.button2 {
		font-size: 13px;
		padding: 12px 12px;
	}
}

@media (min-width: 480px) {
	a.button2 {
		font-size: 15px;
		padding: 14px 16px;
		letter-spacing: -0.02em;
	}
}

@media (min-width: 640px) {
	a.button2 {
		font-size: var(--font-size-base);
		padding: 14px 20px;
		max-width: 520px;
		letter-spacing: 0;
	}
}

a.button2:hover {
	color: #fff;
	background: var(--color-accent-hover);
	box-shadow: 0 6px 20px rgba(41, 116, 240, 0.32);
	transform: translateY(-1px);
}

/* ==========================================================================
   Single Post
   ========================================================================== */

.single-header {
	margin-bottom: var(--space-lg);
}

.single-header__title {
	font-size: var(--font-size-2xl);
	font-weight: 800;
	letter-spacing: -0.02em;
	margin-bottom: var(--space-md);
}

.single-content {
	padding: var(--space-lg);
	margin-bottom: var(--space-lg);
}

.single-content .entry-content {
	font-size: var(--font-size-lg);
	line-height: 1.75;
	color: var(--color-text);
}

.single-content .entry-content p {
	margin-bottom: 1.25em;
}

.single-content .entry-content h2 {
	font-size: var(--font-size-xl);
	font-weight: 800;
	margin-top: 1.75em;
	margin-bottom: 0.85em;
	padding: 0.35em 0 0.35em 0.85em;
	border-left: 3px solid rgba(41, 116, 240, 0.55);
	color: #152033;
	line-height: var(--line-height-tight);
	letter-spacing: -0.01em;
}

.single-content .entry-content h3 {
	font-size: var(--font-size-lg);
	margin-top: 1.25em;
	margin-bottom: 0.5em;
}

.single-content .entry-content ul,
.single-content .entry-content ol {
	margin: 0 0 1.25em 1.25em;
	padding-left: 1em;
	list-style: disc;
}

.single-content .entry-content ol {
	list-style: decimal;
}

.single-content .entry-content li {
	margin-bottom: 0.5em;
}

.single-content .entry-content img {
	border-radius: var(--radius-md);
	margin: 1em 0;
}

.single-content .entry-content blockquote {
	margin: 1.25em 0;
	padding: var(--space-md) var(--space-lg);
	border-left: 4px solid var(--color-accent);
	background: var(--color-accent-light);
	border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
	color: var(--color-text-secondary);
}

.single-content .entry-content table {
	width: 100%;
	border-collapse: collapse;
	margin: 1em 0;
	font-size: var(--font-size-sm);
}

.single-content .entry-content th,
.single-content .entry-content td {
	padding: 10px 12px;
	border: 1px solid var(--color-border-subtle);
	text-align: left;
}

.single-content .entry-content th {
	background: var(--color-accent-light);
	font-weight: 600;
}

/* Breadcrumbs */
.breadcrumbs {
	font-size: var(--font-size-sm);
	color: var(--color-text-muted);
	margin-bottom: var(--space-md);
}

.breadcrumbs a {
	color: var(--color-text-secondary);
}

/* Related Posts */
.related-posts {
	padding: var(--space-lg);
	margin-top: var(--space-lg);
}

.related-posts__title {
	font-size: var(--font-size-lg);
	margin-bottom: var(--space-md);
}

.related-posts__list li {
	padding: var(--space-sm) 0;
	border-bottom: 1px solid var(--color-border-subtle);
}

.related-posts__list li:last-child {
	border-bottom: none;
}

.related-posts__list a {
	font-weight: 500;
	color: var(--color-text);
}

.related-posts__date {
	display: block;
	font-size: 12px;
	color: var(--color-text-muted);
	margin-top: 2px;
}

/* ==========================================================================
   Page Template
   ========================================================================== */

.page-header {
	margin-bottom: var(--space-lg);
}

.page-header__title {
	font-size: var(--font-size-2xl);
	font-weight: 800;
}

.page-content {
	padding: var(--space-lg);
}

/* ==========================================================================
   Archive & Search
   ========================================================================== */

.archive-ad {
	margin-bottom: var(--space-lg);
	padding: var(--space-md);
	min-height: 100px;
	display: flex;
	align-items: center;
	justify-content: center;
}

.archive-ad .ad-slot {
	margin: 0;
	width: 100%;
	min-height: 100px;
}

.search-header {
	margin-bottom: var(--space-lg);
	padding: var(--space-lg);
}

.search-header__title {
	font-size: var(--font-size-xl);
	font-weight: 700;
	margin: 0;
}

/* ==========================================================================
   404
   ========================================================================== */

.error-404 {
	text-align: center;
	padding: var(--space-2xl) var(--space-lg);
}

.error-404__title {
	font-size: 4rem;
	font-weight: 800;
	color: var(--color-accent);
	margin-bottom: var(--space-sm);
}

.error-404__message {
	color: var(--color-text-secondary);
	margin-bottom: var(--space-lg);
}

.error-404 .search-form {
	max-width: 360px;
	margin: 0 auto;
}

/* ==========================================================================
   Comments
   ========================================================================== */

.comments-area {
	margin-top: var(--space-xl);
	padding: var(--space-lg);
}

.comments-title {
	font-size: var(--font-size-lg);
	margin-bottom: var(--space-md);
}

.comment-list {
	margin-bottom: var(--space-lg);
}

.comment-list .comment {
	padding: var(--space-md) 0;
	border-bottom: 1px solid var(--color-border-subtle);
}

.comment-author {
	font-weight: 600;
	margin-bottom: var(--space-xs);
}

.comment-meta {
	font-size: 12px;
	color: var(--color-text-muted);
	margin-bottom: var(--space-sm);
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
	width: 100%;
	padding: 12px 16px;
	font-family: inherit;
	font-size: var(--font-size-base);
	border: 1px solid var(--color-border-subtle);
	border-radius: var(--radius-sm);
	margin-bottom: var(--space-md);
}

.comment-form input[type="submit"] {
	padding: 12px 24px;
	font-size: var(--font-size-base);
	font-weight: 600;
	color: #fff;
	background: var(--color-accent);
	border: none;
	border-radius: var(--radius-sm);
	cursor: pointer;
	min-height: var(--tap-min);
}

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

.site-footer {
	margin-top: auto;
	padding: var(--space-2xl) var(--space-md) var(--space-xl);
	background: rgba(255, 255, 255, 0.55);
	backdrop-filter: blur(var(--glass-blur));
	-webkit-backdrop-filter: blur(var(--glass-blur));
	border-top: 1px solid var(--color-border-subtle);
}

.site-footer__inner {
	max-width: var(--container-max);
	margin: 0 auto;
	text-align: center;
}

.site-footer__content {
	margin-bottom: var(--space-lg);
}

.site-footer__brand {
	margin: 0 0 var(--space-sm);
	font-size: var(--font-size-xl);
	font-weight: 800;
}

.site-footer__brand a {
	color: var(--color-text);
}

.site-footer__brand a:hover {
	color: var(--color-accent);
}

.site-footer__tagline {
	margin: 0 0 var(--space-md);
	font-size: var(--font-size-sm);
	color: var(--color-text-secondary);
}

.site-footer__nav {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: var(--space-sm) var(--space-md);
	margin-bottom: var(--space-md);
}

.site-footer__nav a {
	font-size: var(--font-size-sm);
	font-weight: 500;
	color: var(--color-text-secondary);
	padding: 6px 4px;
}

.site-footer__nav a:hover {
	color: var(--color-accent);
}

.site-footer__disclaimer {
	margin: 0;
	font-size: 12px;
	line-height: 1.6;
	color: var(--color-text-muted);
	max-width: 480px;
	margin-inline: auto;
}

.site-footer__copyright {
	font-size: 12px;
	color: var(--color-text-muted);
	padding-top: var(--space-md);
	border-top: 1px solid var(--color-border-subtle);
}

.site-footer__copyright p {
	margin: 0;
}

.site-footer__copyright a {
	color: var(--color-text-secondary);
}

/* ==========================================================================
   Pagination
   ========================================================================== */

.pagination,
.nav-links {
	display: flex;
	justify-content: center;
	gap: var(--space-sm);
	margin-top: var(--space-xl);
	flex-wrap: wrap;
}

.pagination a,
.pagination span,
.nav-links a,
.nav-links span {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: var(--tap-min);
	min-height: var(--tap-min);
	padding: 0 16px;
	font-size: var(--font-size-sm);
	font-weight: 500;
	border-radius: var(--radius-sm);
	background: var(--glass-bg);
	border: 1px solid var(--color-border-subtle);
	color: var(--color-text);
}

.pagination a:hover,
.nav-links a:hover {
	background: var(--color-accent-light);
	color: var(--color-accent);
}

.pagination .current,
.nav-links .current {
	background: var(--color-accent);
	color: #fff;
	border-color: var(--color-accent);
}

/* ==========================================================================
   Section Titles
   ========================================================================== */

.section-title {
	font-size: var(--font-size-lg);
	font-weight: 700;
	margin-bottom: var(--space-md);
	padding-left: var(--space-xs);
}