:root {
  --main-color: #1A365D;
  --sub-color: #E8913A;
  --bg-light: #F8FAFC;
  --bg-white: #FFFFFF;
  --card-bg: #FFFFFF;
  --header-bg: #1A365D;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --border-color: #E2E8F0;
  --border-light: #F1F5F9;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --box-shadow-hover: 0 12px 20px -3px rgba(0, 0, 0, 0.12), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --success: #059669;
  --danger: #DC2626;
  --warning-bg: #FFFBEB;
  --warning-border: #F59E0B;
  --warning-text: #92400E;
  --modal-backdrop: rgba(15, 23, 42, 0.65);
}

[data-theme="dark"] {
  --main-color: #0F172A;
  --sub-color: #F6AD55;
  --bg-light: #0B1120;
  --bg-white: #1E293B;
  --card-bg: #1E293B;
  --header-bg: #0F172A;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border-color: #334155;
  --border-light: #1E293B;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --box-shadow-hover: 0 12px 24px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --warning-bg: #2A1F13;
  --warning-border: #D97706;
  --warning-text: #FDE68A;
  --modal-backdrop: rgba(0, 0, 0, 0.8);
}

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, blockquote, figure {
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans KR', 'Pretendard', sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-light);
  line-height: 1.68;
  padding-top: 68px; /* Fixed header height offset */
  transition: background-color 0.25s ease, color 0.25s ease;
  word-break: keep-all;
  overflow-wrap: break-word;
}

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

ul, ol {
  list-style: none;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--sub-color), #F6AD55);
  z-index: 1002;
  transition: width 0.1s ease-out;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.25rem; font-weight: 800; margin-bottom: 1.25rem; }
h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 1rem; margin-top: 2.25rem; }
h3 { font-size: 1.3rem; font-weight: 600; margin-bottom: 0.75rem; margin-top: 1.75rem; }
h4 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; }

p { margin-bottom: 1.15rem; font-size: 1.02rem; }
strong { font-weight: 700; }
small { font-size: 0.875rem; color: var(--text-secondary); }

blockquote {
  border-left: 4px solid var(--sub-color);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  background-color: var(--card-bg);
  border-radius: 0 8px 8px 0;
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  font-style: normal;
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 3.5rem 0;
}

.section-title {
  text-align: center;
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 2.5rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 44px;
  height: 4px;
  background: var(--sub-color);
  margin: 0.6rem auto 0;
  border-radius: 2px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--header-bg);
  color: #FFFFFF;
  z-index: 1000;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background-color 0.25s ease, box-shadow 0.3s ease;
}

.site-header.shadow {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.site-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: #FFFFFF;
  text-decoration: none;
  letter-spacing: -0.5px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo:hover {
  opacity: 0.92;
}

.main-nav {
  display: flex;
  align-items: center;
}

.main-nav > ul {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.main-nav > ul > li {
  position: relative;
}

.main-nav > ul > li > a {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 0;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s ease;
}

.main-nav > ul > li > a:hover,
.main-nav > ul > li > a.active {
  color: var(--sub-color);
}

/* Submenu Dropdown */
.has-submenu {
  position: relative;
}

.has-submenu .arrow-down {
  font-size: 0.75rem;
  transition: transform 0.2s ease;
  margin-left: 2px;
}

.has-submenu:hover .arrow-down {
  transform: rotate(180deg);
}

.has-submenu .submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--card-bg);
  min-width: 220px;
  padding: 0.5rem 0;
  border-radius: 8px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.25), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--border-color);
  z-index: 1000;
  flex-direction: column;
  gap: 0;
  list-style: none;
  margin: 0.25rem 0 0 0;
}

.has-submenu:hover .submenu,
.has-submenu:focus-within .submenu {
  display: flex;
}

.has-submenu .submenu li {
  width: 100%;
}

.has-submenu .submenu li a {
  display: block;
  padding: 0.65rem 1.25rem;
  color: var(--text-primary) !important;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, padding 0.15s ease;
  white-space: nowrap;
  border-bottom: 1px solid var(--border-light);
}

.has-submenu .submenu li:last-child a {
  border-bottom: none;
}

.has-submenu .submenu li a:hover {
  background: var(--bg-light);
  color: var(--sub-color) !important;
  padding-left: 1.45rem;
}

/* Header Action Buttons (Search, Theme Toggle, Language) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.search-btn,
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  height: 36px;
  padding: 0 0.65rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #FFFFFF;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.search-btn:hover,
.theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
}

.search-shortcut {
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: inherit;
}

.theme-toggle-btn {
  width: 36px;
  padding: 0;
}

.lang-switch-wrapper {
  display: flex;
  align-items: center;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 36px;
  padding: 0 0.8rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #FFFFFF;
  font-size: 0.85rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
  letter-spacing: 0.5px;
}

.lang-btn:hover {
  background: var(--sub-color);
  border-color: var(--sub-color);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: #FFFFFF;
  font-size: 1.6rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  background: linear-gradient(135deg, var(--main-color) 0%, #2A4365 100%);
  color: #FFFFFF;
  padding: 5rem 0;
  text-align: center;
}

[data-theme="dark"] .hero-section {
  background: linear-gradient(135deg, #0B1120 0%, #1E293B 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero-section h1 {
  font-size: 2.8rem;
  color: #FFFFFF;
  margin-bottom: 1rem;
}

.hero-section .tagline {
  font-size: 1.35rem;
  font-weight: 500;
  color: #E2E8F0;
  margin-bottom: 1rem;
}

.hero-section .description {
  max-width: 720px;
  margin: 0 auto 2rem;
  color: #CBD5E1;
  font-size: 1.05rem;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  padding: 0.75rem 1.6rem;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  border: none;
  font-size: 0.98rem;
  transition: all 0.2s ease;
}

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

.btn-primary:hover {
  background-color: #D67E28;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(232, 145, 58, 0.35);
}

.btn-secondary {
  background-color: var(--card-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-light);
  border-color: var(--text-secondary);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.88rem;
}

/* ==========================================================================
   Category & Post Cards
   ========================================================================== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.5rem;
}

.category-card {
  background: var(--card-bg);
  padding: 1.8rem 1.4rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--box-shadow);
  text-align: center;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow-hover);
  border-color: var(--sub-color);
}

.category-icon {
  font-size: 2.2rem;
  margin-bottom: 0.8rem;
}

.category-card h3 {
  font-size: 1.15rem;
  margin: 0 0 0.5rem 0;
  color: var(--text-primary);
}

.category-card p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 0;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.75rem;
}

.post-card {
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--box-shadow-hover);
  border-color: var(--sub-color);
}

.post-card a {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-category {
  display: inline-block;
  align-self: flex-start;
  background: var(--bg-light);
  color: var(--sub-color);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
  margin-bottom: 0.85rem;
}

.post-card h3, .post-card h4 {
  font-size: 1.22rem;
  margin: 0 0 0.75rem 0;
  color: var(--text-primary);
  line-height: 1.4;
}

.post-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  flex: 1;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.84rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 0.85rem;
  margin-top: auto;
}

.meta-sep {
  color: var(--border-color);
}

/* ==========================================================================
   Editorial Principles & Mini Author
   ========================================================================== */
.editorial-principles-section {
  background: var(--card-bg);
  border-radius: 14px;
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  margin-top: 2rem;
}

.principles-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  padding: 0;
  margin-top: 1.5rem;
}

.principles-list li {
  position: relative;
  padding-left: 1.8rem;
  font-size: 0.96rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.principles-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--sub-color);
  font-weight: 800;
}

.author-box {
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
  box-shadow: var(--box-shadow);
}

.author-box h3 {
  margin-top: 0;
}

/* Column List on Home */
.column-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.column-card {
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--sub-color);
  box-shadow: var(--box-shadow);
  transition: all 0.25s ease;
}

.column-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--box-shadow-hover);
}

.column-card a {
  display: block;
  padding: 1.5rem;
}

.column-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.18rem;
}

.column-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   Article Detail & Rich Layout
   ========================================================================== */
.post-detail {
  max-width: 820px;
  margin: 0 auto;
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 14px;
  border: 1px solid var(--border-color);
  box-shadow: var(--box-shadow);
  margin-top: 2rem;
  margin-bottom: 4rem;
}

.article-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.75rem;
  margin-bottom: 2rem;
}

.category-tag {
  display: inline-block;
  background: var(--main-color);
  color: #FFFFFF;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 0.85rem;
}

[data-theme="dark"] .category-tag {
  background: #334155;
  color: var(--sub-color);
}

.category-tag.column-tag {
  background: var(--sub-color);
}

.article-header h1 {
  font-size: 2.15rem;
  margin-bottom: 0.75rem;
}

.article-header .subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.article-meta a {
  font-weight: 600;
  color: var(--sub-color);
}

.reading-time-tag {
  background: var(--bg-light);
  padding: 0.15rem 0.6rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-primary);
}

/* Table of Contents */
.toc-container {
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
}

.toc-container ul {
  padding-left: 0;
}

.toc-container li {
  margin-bottom: 0.4rem;
}

.toc-container a {
  color: var(--text-primary);
  font-size: 0.94rem;
  transition: color 0.15s ease;
}

.toc-container a:hover {
  color: var(--sub-color);
  text-decoration: underline;
}

/* Article Body */
.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 1.6rem;
  border-bottom: 2px solid var(--border-light);
  padding-bottom: 0.4rem;
  margin-top: 2.75rem;
}

.article-body h3 {
  font-size: 1.25rem;
  margin-top: 2rem;
}

.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }

.article-body li {
  margin-bottom: 0.5rem;
}

/* Content Boxes (Summary, Mistakes, Checklist) */
.summary-box, .beginner-mistakes-box, .checklist-box {
  border-radius: 10px;
  padding: 1.5rem;
  margin: 2.25rem 0;
  border: 1px solid var(--border-color);
}

.summary-box {
  background: #F0FDF4;
  border-left: 5px solid var(--success);
}
[data-theme="dark"] .summary-box {
  background: #064E3B22;
  border-color: #059669;
}
.summary-box h3 { color: var(--success); margin-top: 0; }

.beginner-mistakes-box {
  background: #FEF2F2;
  border-left: 5px solid var(--danger);
}
[data-theme="dark"] .beginner-mistakes-box {
  background: #7F1D1D22;
  border-color: #DC2626;
}
.beginner-mistakes-box h3 { color: var(--danger); margin-top: 0; }

.checklist-box {
  background: #EFF6FF;
  border-left: 5px solid #2563EB;
}
[data-theme="dark"] .checklist-box {
  background: #1E3A8A22;
  border-color: #3B82F6;
}
.checklist-box h3 { color: #2563EB; margin-top: 0; }
.checklist-box ul { list-style: none; padding-left: 0; }
.checklist-box li { padding-left: 1.5rem; position: relative; margin-bottom: 0.4rem; }
.checklist-box li::before { content: '☑'; position: absolute; left: 0; color: #2563EB; }

/* Rich Content: Styled Tables & Callouts */
.table-styled {
  width: 100%;
  border-collapse: collapse;
  margin: 1.75rem 0;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.95rem;
}

.table-styled th, .table-styled td {
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.table-styled th {
  background: var(--bg-light);
  font-weight: 700;
  color: var(--text-primary);
}

.callout-box {
  padding: 1.25rem 1.5rem;
  border-radius: 8px;
  background: var(--warning-bg);
  border-left: 4px solid var(--warning-border);
  color: var(--warning-text);
  margin: 1.75rem 0;
}

/* FAQ Section */
.faq-section {
  margin: 3rem 0;
}

.faq-accordion {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.faq-item {
  border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-q {
  padding: 1.1rem 1.4rem;
  cursor: pointer;
  background: var(--bg-light);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: background 0.15s ease;
}

.faq-q:hover {
  background: var(--card-bg);
}

.faq-q::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--sub-color);
}

.faq-item.active .faq-q::after {
  content: '−';
}

.faq-answer {
  display: none;
  padding: 1.2rem 1.4rem;
  background: var(--card-bg);
  color: var(--text-secondary);
}

.faq-item.active .faq-answer {
  display: block;
}

/* Share & Copy Link Bar */
.article-share-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-light);
  border-radius: 10px;
  border: 1px solid var(--border-color);
  margin: 2.5rem 0;
}

.share-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-right: 0.5rem;
}

.btn-share {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border-radius: 6px;
  font-size: 0.86rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-share:hover {
  background: var(--sub-color);
  border-color: var(--sub-color);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.author-box-detail {
  background: var(--bg-light);
  border-radius: 10px;
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  margin-top: 2.5rem;
}

.author-box-detail h4 {
  color: var(--text-secondary);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.author-box-detail a {
  color: var(--text-primary);
}

.author-box-detail a:hover {
  color: var(--sub-color);
}

.article-footer-notice {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 2rem;
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

/* Breadcrumbs */
.breadcrumb-wrapper {
  padding: 1rem 1.5rem 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.breadcrumb-item a:hover {
  color: var(--sub-color);
}

.breadcrumb-item:not(:last-child)::after {
  content: '›';
  margin-left: 0.5rem;
  color: var(--text-muted);
}

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 600;
}

/* ==========================================================================
   Search Modal (Interactive Quick Search)
   ========================================================================== */
.search-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-backdrop);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh 1.25rem 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.search-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.search-modal-box {
  width: 100%;
  max-width: 620px;
  background: var(--card-bg);
  border-radius: 14px;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 75vh;
  animation: modalSlideDown 0.2s ease-out;
}

@keyframes modalSlideDown {
  from { transform: translateY(-20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.search-modal-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  gap: 0.75rem;
}

.search-modal-icon {
  font-size: 1.2rem;
}

.search-modal-input {
  flex: 1;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  color: var(--text-primary);
  outline: none;
  font-family: inherit;
}

.search-modal-close {
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  font-size: 0.9rem;
}

.search-modal-close:hover {
  background: var(--border-color);
  color: var(--text-primary);
}

.search-modal-results {
  padding: 0.5rem 0;
  overflow-y: auto;
  flex: 1;
}

.search-empty-state {
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.search-item {
  display: block;
  padding: 0.9rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
  transition: background 0.15s ease;
  text-decoration: none;
}

.search-item:last-child {
  border-bottom: none;
}

.search-item:hover, .search-item.selected {
  background: var(--bg-light);
}

.search-item-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.search-item-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0;
}

.search-badge {
  font-size: 0.72rem;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  color: var(--sub-color);
  font-weight: 700;
}

.search-modal-footer {
  padding: 0.65rem 1.25rem;
  background: var(--bg-light);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.search-modal-footer kbd {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-family: inherit;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #1E293B;
  color: #FFFFFF;
  padding: 0.85rem 1.4rem;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
  border: 1px solid #334155;
  font-size: 0.92rem;
  font-weight: 600;
  z-index: 3000;
  opacity: 0;
  transform: translateY(15px);
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--main-color);
  color: rgba(255, 255, 255, 0.75);
  padding: 4rem 0 2rem;
  margin-top: 5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h3 {
  color: #FFFFFF;
  font-size: 1.15rem;
  margin-bottom: 1.2rem;
  margin-top: 0;
}

.footer-col p {
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 0.6rem;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.8);
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--sub-color);
}

.footer-col ul li {
  margin-bottom: 0.5rem;
  font-size: 0.92rem;
}

.footer-bottom {
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 860px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .post-detail {
    padding: 1.5rem;
    margin: 1rem 0 3rem;
  }
  
  .hero-section {
    padding: 3.5rem 0;
  }
  
  .hero-section h1 {
    font-size: 2.1rem;
  }
}

@media (max-width: 767px) {
  .mobile-menu-btn {
    display: block;
  }
  
  .search-shortcut {
    display: none;
  }
  
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background-color: var(--header-bg);
    flex-direction: column;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .main-nav.active {
    display: flex;
  }
  
  .main-nav > ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    width: 100%;
  }
  
  .has-submenu .submenu {
    position: static;
    display: flex;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
    background: transparent;
  }
  
  .has-submenu .submenu li a {
    color: rgba(255, 255, 255, 0.8) !important;
    border-bottom: none;
    padding: 0.4rem 0;
  }
}