/*
Theme Name: Toss Blog
Theme URI: https://github.com/yourname/toss-blog-theme
Author: Your Name
Author URI: https://yoursite.com
Description: 토스 테크 블로그 스타일의 미니멀 개인 블로그 테마. 해시태그, 깔끔한 타이포그래피, 카드형 목록을 지원합니다.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.5
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: toss-blog
Tags: blog, minimal, clean, korean, hashtag
*/

/* =============================================
   0. CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================= */
:root {
  /* Colors */
  --color-bg:          #ffffff;
  --color-surface:     #f9fafb;
  --color-border:      #e8eaed;
  --color-text-primary:   #191F28;
  --color-text-secondary: #4e5968;
  --color-text-tertiary:  #8B95A1;
  --color-accent:      #3182F6;
  --color-accent-hover:#1B64DA;
  --color-tag-bg:      #F2F4F6;
  --color-tag-text:    #4e5968;

  /* Typography */
  --font-sans: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont,
               'Apple SD Gothic Neo', 'Noto Sans KR', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --text-xs:   0.75rem;   /* 12px */
  --text-sm:   0.875rem;  /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg:   1.125rem;  /* 18px */
  --text-xl:   1.25rem;   /* 20px */
  --text-2xl:  1.5rem;    /* 24px */
  --text-3xl:  1.875rem;  /* 30px */
  --text-4xl:  2.25rem;   /* 36px */

  --leading-tight:  1.3;
  --leading-snug:   1.5;
  --leading-normal: 1.7;
  --leading-relaxed:1.8;

  --fw-regular: 400;
  --fw-medium:  500;
  --fw-semibold:600;
  --fw-bold:    700;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width-content: 720px;
  --max-width-wide:    1200px;
  --max-width-nav:     1140px;

  /* Borders & Radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-full:9999px;

  /* Shadows */
  --shadow-card: 0 1px 3px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  --shadow-card-hover: 0 4px 20px rgba(0,0,0,.10);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}


/* =============================================
   1. RESET & BASE
   ============================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--fw-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* =============================================
   2. LAYOUT UTILITIES
   ============================================= */
.container {
  width: 100%;
  max-width: var(--max-width-nav);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--content {
  max-width: var(--max-width-content);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* =============================================
   3. HEADER & NAVIGATION
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: var(--space-8);
}

/* Logo */
.site-branding {
  flex-shrink: 0;
}

.site-title {
  font-size: var(--text-xl);
  font-weight: var(--fw-bold);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.site-title a {
  color: inherit;
}

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

/* Primary Nav */
.primary-nav {
  flex: 1;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.primary-nav__item a {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.primary-nav__item a:hover,
.primary-nav__item.current-menu-item a {
  color: var(--color-text-primary);
  background-color: var(--color-tag-bg);
}

/* Header right actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.header-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.header-search-btn:hover {
  background-color: var(--color-tag-bg);
  color: var(--color-text-primary);
}

/* =============================================
   4. SEARCH OVERLAY
   ============================================= */
.search-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.4);
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
}

.search-overlay.is-open {
  display: flex;
}

.search-overlay__box {
  width: 100%;
  max-width: 540px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,.18);
}

.search-overlay__form {
  display: flex;
  align-items: center;
  padding: var(--space-4) var(--space-5);
  gap: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.search-overlay__input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  color: var(--color-text-primary);
  background: transparent;
}

.search-overlay__input::placeholder {
  color: var(--color-text-tertiary);
}

.search-overlay__close {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.search-overlay__close:hover {
  background-color: var(--color-tag-bg);
  color: var(--color-text-primary);
}

/* =============================================
   5. HERO / PAGE HEADER
   ============================================= */
.page-hero {
  padding: var(--space-16) 0 var(--space-10);
  text-align: center;
}

.page-hero__title {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
  font-weight: var(--fw-bold);
  letter-spacing: -0.04em;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.page-hero__desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-snug);
}

/* =============================================
   6. TAG FILTER BAR (홈 해시태그 필터)
   ============================================= */
.tag-filter {
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
}

.tag-filter__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.tag-filter__item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-tag-text);
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-full);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.tag-filter__item::before {
  content: '#';
  font-weight: var(--fw-semibold);
  color: var(--color-text-tertiary);
}

.tag-filter__item:hover {
  background-color: #e8f0fe;
  color: var(--color-accent);
  border-color: rgba(49,130,246,0.2);
}

.tag-filter__item.is-active {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.tag-filter__item.is-active::before {
  color: rgba(255,255,255,0.75);
}

/* =============================================
   7. POST CARDS (목록)
   ============================================= */
.posts-grid {
  display: grid;
  gap: var(--space-6);
}

/* Featured post: first card bigger */
.post-card {
  display: grid;
  grid-template-columns: 1fr;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.post-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

@media (min-width: 640px) {
  .post-card--has-thumb {
    grid-template-columns: 1fr 280px;
  }
}

.post-card__body {
  padding: var(--space-6) var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.post-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.post-card__tag {
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-accent);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.post-card__tag::before {
  content: '#';
}

.post-card__title {
  font-size: var(--text-xl);
  font-weight: var(--fw-bold);
  letter-spacing: -0.02em;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
}

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

.post-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
}

.post-card__author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-tag-bg);
  flex-shrink: 0;
}

.post-card__meta {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.post-card__meta-sep {
  margin-inline: var(--space-1);
}

.post-card__thumb {
  overflow: hidden;
  aspect-ratio: 16/10;
  background: var(--color-surface);
}

@media (min-width: 640px) {
  .post-card--has-thumb .post-card__thumb {
    aspect-ratio: unset;
    height: 100%;
  }
}

.post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.post-card:hover .post-card__thumb img {
  transform: scale(1.04);
}

/* =============================================
   8. PAGINATION
   ============================================= */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-12) 0;
}

.pagination .page-numbers {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding-inline: var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.pagination .page-numbers:hover {
  background-color: var(--color-tag-bg);
  color: var(--color-text-primary);
  border-color: transparent;
}

.pagination .page-numbers.current {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.pagination .page-numbers.prev,
.pagination .page-numbers.next {
  font-size: var(--text-xs);
}

/* =============================================
   9. SINGLE POST
   ============================================= */
.single-post {
  padding-bottom: var(--space-24);
}

/* Post Header */
.post-header {
  padding: var(--space-16) 0 var(--space-10);
  text-align: center;
}

/* Hashtags above the title */
.post-header__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
  margin-bottom: var(--space-5);
}

.post-header__tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-accent);
  background-color: #e8f0fe;
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
  text-decoration: none;
}

.post-header__tag::before {
  content: '#';
  margin-right: 2px;
  opacity: 0.7;
}

.post-header__tag:hover {
  background-color: #d0e4fd;
}

.post-header__title {
  font-size: clamp(var(--text-2xl), 4.5vw, var(--text-4xl));
  font-weight: var(--fw-bold);
  letter-spacing: -0.04em;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.post-header__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.post-header__author {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-secondary);
  font-weight: var(--fw-medium);
}

.post-header__author-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-tag-bg);
}

.post-header__sep {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-border);
}

/* Thumbnail */
.post-thumbnail {
  margin-bottom: var(--space-10);
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16/9;
  max-height: 480px;
}

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

/* =============================================
   10. POST CONTENT (Typography)
   ============================================= */
.post-content {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  word-break: keep-all;
  overflow-wrap: break-word;
}

.post-content > * + * {
  margin-top: var(--space-6);
}

/* Headings */
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  font-weight: var(--fw-bold);
  letter-spacing: -0.025em;
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

.post-content h2 { font-size: var(--text-2xl); }
.post-content h3 { font-size: var(--text-xl); }
.post-content h4 { font-size: var(--text-lg); }

/* Paragraph */
.post-content p {
  margin-top: 0;
  margin-bottom: var(--space-5);
}

/* Links */
.post-content a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color var(--transition-fast);
}

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

/* Lists */
.post-content ul,
.post-content ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-5);
}

.post-content ul { list-style: disc; }
.post-content ol { list-style: decimal; }

.post-content li + li {
  margin-top: var(--space-2);
}

/* Blockquote */
.post-content blockquote {
  margin: var(--space-8) 0;
  padding: var(--space-5) var(--space-6);
  border-left: 3px solid var(--color-accent);
  background-color: var(--color-surface);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
}

.post-content blockquote p {
  margin-bottom: 0;
}

/* Code */
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-tag-bg);
  color: #d63384;
  padding: 2px 6px;
  border-radius: 4px;
}

.post-content pre {
  background: #1a1d23;
  color: #e5e7eb;
  padding: var(--space-5) var(--space-6);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: var(--space-8) 0;
  font-size: var(--text-sm);
  line-height: 1.7;
}

.post-content pre code {
  background: none;
  color: inherit;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

/* Images inside content */
.post-content img {
  border-radius: var(--radius-md);
  margin: var(--space-8) 0;
}

/* Horizontal Rule */
.post-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-10) 0;
}

/* Table */
.post-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  margin: var(--space-8) 0;
  overflow-x: auto;
  display: block;
}

.post-content th,
.post-content td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.post-content th {
  font-weight: var(--fw-semibold);
  color: var(--color-text-secondary);
  background: var(--color-surface);
}

/* =============================================
   11. POST FOOTER (태그 + 이전/다음)
   ============================================= */
.post-footer {
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid var(--color-border);
}

.post-footer__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.post-footer__tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-tag-text);
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.post-footer__tag::before {
  content: '#';
  margin-right: 2px;
  opacity: 0.6;
}

.post-footer__tag:hover {
  background-color: #e8f0fe;
  color: var(--color-accent);
}

/* Prev / Next navigation */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.post-nav__item {
  padding: var(--space-5) var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.post-nav__item:hover {
  border-color: var(--color-accent);
  background: #e8f0fe;
}

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

.post-nav__label {
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-nav__title {
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}

/* =============================================
   12. SIDEBAR WIDGETS
   ============================================= */
.widget {
  margin-bottom: var(--space-8);
}

.widget-title {
  font-size: var(--text-sm);
  font-weight: var(--fw-bold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.widget ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.widget ul li a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.widget ul li a:hover {
  color: var(--color-accent);
}

/* Tag Cloud Widget */
.widget_tag_cloud .tagcloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.widget_tag_cloud .tagcloud a {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs) !important;
  font-weight: var(--fw-medium);
  color: var(--color-tag-text);
  background: var(--color-tag-bg);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.widget_tag_cloud .tagcloud a:hover {
  background: #e8f0fe;
  color: var(--color-accent);
}

/* =============================================
   13. ARCHIVE / CATEGORY HEADER
   ============================================= */
.archive-header {
  padding: var(--space-12) 0 var(--space-8);
}

.archive-title {
  font-size: var(--text-3xl);
  font-weight: var(--fw-bold);
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  margin-bottom: var(--space-2);
}

.archive-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

/* =============================================
   14. FOOTER
   ============================================= */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: var(--space-12) 0;
  margin-top: var(--space-16);
}

.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.site-footer__brand {
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  color: var(--color-text-primary);
}

.site-footer__copy {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.site-footer__links {
  display: flex;
  gap: var(--space-4);
}

.site-footer__links a {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  transition: color var(--transition-fast);
}

.site-footer__links a:hover {
  color: var(--color-text-primary);
}

/* =============================================
   15. 404 & NO RESULTS
   ============================================= */
.error-page,
.no-results {
  padding: var(--space-24) 0;
  text-align: center;
}

.error-page__code {
  font-size: 7rem;
  font-weight: var(--fw-bold);
  letter-spacing: -0.05em;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: var(--space-6);
}

.error-page__title,
.no-results__title {
  font-size: var(--text-2xl);
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-4);
}

.error-page__desc,
.no-results__desc {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

/* =============================================
   16. READING PROGRESS BAR
   ============================================= */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--color-accent);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* =============================================
   17. SKIP LINK (접근성)
   ============================================= */
.skip-link {
  position: absolute;
  top: -999px;
  left: -999px;
  z-index: 9999;
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
}

.skip-link:focus {
  top: var(--space-4);
  left: var(--space-4);
}

/* =============================================
   18. RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  :root {
    --space-6: 1.25rem;
  }

  .site-header__inner {
    height: 56px;
  }

  .primary-nav {
    display: none; /* 모바일에서는 햄버거 메뉴로 대체 */
  }

  .page-hero {
    padding: var(--space-10) 0 var(--space-8);
  }

  .post-card__body {
    padding: var(--space-5) var(--space-5);
  }

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

  .post-nav {
    grid-template-columns: 1fr;
  }

  .post-nav__item--next {
    text-align: left;
  }

  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .post-header {
    padding: var(--space-10) 0 var(--space-8);
    text-align: left;
  }

  .post-header__tags {
    justify-content: flex-start;
  }

  .post-header__meta {
    justify-content: flex-start;
  }

  .tag-filter__list {
    gap: var(--space-2);
  }
}


/* =============================================
   19. 홈 레이아웃 (포스트 목록 + 우측 사이드바)
   ============================================= */
.home-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: var(--space-10);
  align-items: start;
}

@media (max-width: 900px) {
  .home-layout {
    grid-template-columns: 1fr;
  }
}

/* =============================================
   20. 단일 포스트 레이아웃 (본문 + 우측 사이드바)
   ============================================= */
.single-post-layout {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: var(--space-10);
  align-items: start;
  max-width: var(--max-width-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (max-width: 900px) {
  .single-post-layout {
    grid-template-columns: 1fr;
    padding-inline: 0;
  }

  .single-post-layout .sidebar-wrap {
    display: none; /* 모바일에서는 사이드바 숨김 */
  }
}

.sidebar-wrap {
  position: sticky;
  top: calc(64px + var(--space-6)); /* 헤더 높이 + 여백 */
  padding-top: var(--space-8);
}

/* =============================================
   21. 태그 사이드바
   ============================================= */
.tag-sidebar {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-5);
}

.tag-sidebar__title {
  font-size: var(--text-xs);
  font-weight: var(--fw-bold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

.tag-sidebar__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.tag-sidebar__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.tag-sidebar__item::before {
  content: '#';
  color: var(--color-text-tertiary);
  margin-right: 2px;
  font-weight: var(--fw-semibold);
}

.tag-sidebar__item:hover {
  background-color: #e8f0fe;
  color: var(--color-accent);
}

.tag-sidebar__item.is-active {
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: var(--fw-semibold);
}

.tag-sidebar__item.is-active::before {
  color: rgba(255,255,255,0.7);
}

.tag-sidebar__count {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  background: rgba(0,0,0,0.06);
  border-radius: var(--radius-full);
  padding: 1px 7px;
  margin-left: var(--space-2);
  flex-shrink: 0;
}

.tag-sidebar__item.is-active .tag-sidebar__count {
  background: rgba(255,255,255,0.25);
  color: rgba(255,255,255,0.9);
}

/* =============================================
   22. 카드 아바타 이미지 (로고) — object-fit 조정
   ============================================= */
.post-card__author-avatar {
  object-fit: contain !important;
  background: transparent !important;
}

.post-header__author-avatar {
  object-fit: contain !important;
  background: transparent !important;
}


/* =============================================
   23. 헤더 액션 링크 (병원 오시는 길 / 네이버블로그)
   ============================================= */
.header-action-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-text-secondary);
  background: var(--color-tag-bg);
  border-radius: var(--radius-full);
  border: 1.5px solid transparent;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.header-action-link:hover {
  background: #e8f0fe;
  color: var(--color-accent);
  border-color: rgba(49,130,246,0.2);
}

/* 네이버블로그 버튼 — 초록색 강조 */
.header-action-link--naver {
  color: #03C75A;
  background: #f0fdf6;
}

.header-action-link--naver:hover {
  background: #d4f5e2;
  color: #02a84b;
  border-color: rgba(3,199,90,0.25);
}

/* 모바일에서 텍스트 숨기고 아이콘만 */
@media (max-width: 640px) {
  .header-action-link {
    padding: 6px 8px;
    font-size: 0;       /* 텍스트 숨김 */
    gap: 0;
    border-radius: var(--radius-sm);
  }

  .header-action-link svg {
    width: 17px;
    height: 17px;
  }
}


/* =============================================
   24. 헤더 로고 이미지
   ============================================= */
.site-logo-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo-img {
  height: 36px;
  width: auto;
  display: block;
  /* 검정 배경 혹시 남아있을 경우 mix-blend-mode로 제거 */
  mix-blend-mode: multiply;
}

/* 다크모드 대응 — 로고 반전 */
@media (prefers-color-scheme: dark) {
  .site-logo-img {
    mix-blend-mode: normal;
    filter: brightness(0) invert(1);
  }
}

@media (max-width: 480px) {
  .site-logo-img {
    height: 28px;
  }
}


/* =============================================
   25. 헤더 아래 상단 여백
   ============================================= */
.site-main {
  padding-top: var(--space-8); /* 2rem — 헤더와 첫 포스트 사이 여백 */
}


/* =============================================
   26. v6 — 모바일 헤더 개선
   ============================================= */

/* 모바일 로고 크기 확대 */
@media (max-width: 480px) {
  .site-logo-img {
    height: 36px; /* 28px → 36px */
  }
}

/* 액션 링크 텍스트: 모바일에서도 항상 표시 */
.header-action-link {
  font-size: var(--text-xs) !important; /* 기존 규칙 덮어쓰기 */
  gap: 5px !important;
  padding: 6px 10px !important;
  border-radius: var(--radius-full) !important;
}

/* 모바일에서 텍스트 숨김 해제 */
@media (max-width: 640px) {
  .header-action-link {
    font-size: var(--text-xs) !important;
    padding: 5px 9px !important;
  }

  .header-action-link__label {
    display: inline !important; /* 기존 font-size:0 덮어쓰기 */
    font-size: var(--text-xs);
  }

  .header-action-link svg {
    width: 13px !important;
    height: 13px !important;
    flex-shrink: 0;
  }
}

/* 돋보기 버튼 왼쪽 여백 제거 */
.header-search-btn {
  margin-left: 0 !important;
}

.header-actions {
  gap: var(--space-2) !important; /* 버튼 간 간격 조정 */
}