/* ===== Subsite Base Styles ===== */
/* Shared styles for wellness, ai-tools, finance sections */

/* ===== Variables ===== */
:root {
  /* Default Colors (wellness - green) */
  --color-primary: #26A69A;
  --color-primary-dark: #00897B;
  --color-primary-light: #4DB6AC;
  --color-secondary: #4CAF50;
  --color-accent: #81C784;
  --color-gradient-start: #26A69A;
  --color-gradient-end: #4CAF50;
  
  /* Neutral Colors */
  --color-bg: #FAFAFA;
  --color-bg-white: #FFFFFF;
  --color-bg-light: #F5F5F5;
  --color-bg-card: #FFFFFF;
  
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  
  --color-border: #E0E0E0;
  --color-border-light: #EEEEEE;
  
  /* Typography */
  --font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --line-height: 1.7;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Layout */
  --max-width: 1200px;
  --content-width: 800px;
  
  /* Effects */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
}

/* ===== Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ===== Base ===== */
html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body.subsite {
  font-family: var(--font-family);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ===== Header ===== */
.site-header {
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.logo:hover {
  color: var(--color-primary);
}

.logo-icon {
  font-size: 1.5rem;
}

/* Language Switcher */
.language-switcher {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.lang-option {
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.lang-option:hover {
  color: var(--color-primary);
  background: var(--color-bg-light);
}

.lang-option.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
  background: rgba(38, 166, 154, 0.1);
}

.lang-divider {
  color: var(--color-border);
}

/* Nav Menu */
.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-menu a {
  color: var(--color-text-light);
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-back-main a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.nav-back-main a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--color-gradient-start) 0%, var(--color-gradient-end) 100%);
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.hero-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
}

/* ===== Section ===== */
.section-title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-lg);
  text-align: center;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-primary);
  margin: var(--spacing-sm) auto 0;
  border-radius: 2px;
}

/* ===== Categories Section ===== */
.categories-section {
  padding: var(--spacing-xl) 0;
  background: var(--color-bg-white);
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.category-card {
  background: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition);
  color: var(--color-text);
}

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

.category-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--spacing-sm);
}

.category-card h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.category-card p {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* ===== Posts Section ===== */
.posts-section {
  padding: var(--spacing-xl) 0;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.post-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

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

.post-card-image {
  height: 180px;
  background-size: cover;
  background-position: center;
  background-color: var(--color-bg-light);
}

.post-card-image--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-accent) 100%);
  color: white;
  font-size: 1.25rem;
  font-weight: 500;
}

.post-card-content {
  padding: var(--spacing-md);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.post-category {
  background: var(--color-primary);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
}

.post-card-title {
  font-size: 1.125rem;
  line-height: 1.4;
  margin-bottom: var(--spacing-xs);
}

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

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

.post-card-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.posts-more {
  text-align: center;
  margin-top: var(--spacing-xl);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

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

/* ===== Post Page ===== */
.post-header {
  background: linear-gradient(135deg, var(--color-gradient-start) 0%, var(--color-gradient-end) 100%);
  color: white;
  padding: var(--spacing-xl) 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: 0.9375rem;
  opacity: 0.9;
}

.post-category-badge {
  background: rgba(255,255,255,0.2);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.875rem;
}

.post-category-badge:hover {
  background: rgba(255,255,255,0.3);
  color: white;
}

.reading-time {
  opacity: 0.8;
}

.post-title {
  font-size: 2.25rem;
  line-height: 1.3;
}

.post-description {
  margin-top: var(--spacing-sm);
  font-size: 1.125rem;
  opacity: 0.9;
}

.post-layout {
  display: grid;
  grid-template-columns: 1fr 240px;
  gap: var(--spacing-xl);
  padding: var(--spacing-xl) 0;
}

/* ===== Sidebar / TOC ===== */
.post-sidebar {
  order: 2;
}

.toc-wrapper {
  position: sticky;
  top: 80px;
  background: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.toc-title {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--color-border-light);
}

.toc {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc-link {
  font-size: 0.875rem;
  color: var(--color-text-light);
  padding: 4px 0;
  display: block;
  line-height: 1.4;
}

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

.toc-level-3 {
  padding-left: var(--spacing-sm);
  font-size: 0.8125rem;
}

/* ===== Post Content ===== */
.post-content {
  order: 1;
  max-width: var(--content-width);
}

.post-content h2 {
  font-size: 1.5rem;
  margin: var(--spacing-xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-primary-light);
}

.post-content h3 {
  font-size: 1.25rem;
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.post-content p {
  margin-bottom: var(--spacing-md);
}

.post-content ul, .post-content ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.post-content li {
  margin-bottom: var(--spacing-xs);
}

.post-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg-light);
  margin: var(--spacing-md) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.post-content code {
  background: var(--color-bg-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

.post-content pre {
  background: #2d2d2d;
  color: #f8f8f2;
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content img {
  border-radius: var(--radius-sm);
  margin: var(--spacing-md) 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
}

.post-content th, .post-content td {
  border: 1px solid var(--color-border);
  padding: var(--spacing-sm);
  text-align: left;
}

.post-content th {
  background: var(--color-bg-light);
}

/* ===== Post Tags ===== */
.post-tags {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border-light);
}

.tags-label {
  font-weight: 500;
  margin-right: var(--spacing-xs);
}

.tag {
  display: inline-block;
  background: var(--color-bg-light);
  color: var(--color-text-light);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.875rem;
  margin: 4px 4px 4px 0;
}

/* ===== Post Navigation ===== */
.post-navigation {
  background: var(--color-bg-light);
  padding: var(--spacing-lg) 0;
}

.post-navigation .container {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.post-nav-link {
  flex: 1;
  padding: var(--spacing-md);
  background: var(--color-bg-white);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.post-nav-link:hover {
  box-shadow: var(--shadow-sm);
}

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

.post-nav-empty {
  background: transparent;
}

.post-nav-label {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
}

.post-nav-title {
  display: block;
  color: var(--color-text);
  font-weight: 500;
}

/* ===== Related Posts ===== */
.related-posts {
  padding: var(--spacing-xl) 0;
}

.related-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.related-card {
  background: var(--color-bg-light);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: all var(--transition);
}

.related-card:hover {
  background: var(--color-primary);
  color: white;
}

.related-card h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.related-card time {
  font-size: 0.875rem;
  opacity: 0.7;
}

/* ===== Page ===== */
.page-header {
  background: linear-gradient(135deg, var(--color-gradient-start) 0%, var(--color-gradient-end) 100%);
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.page-title {
  font-size: 2rem;
}

.page-description {
  margin-top: var(--spacing-sm);
  opacity: 0.9;
}

.page-content {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.page-content h2 {
  font-size: 1.5rem;
  margin: var(--spacing-xl) 0 var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--color-primary-light);
}

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

.page-content ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.page-content li {
  margin-bottom: var(--spacing-xs);
}

/* ===== Footer ===== */
.site-footer {
  background: #2C3E50;
  color: #ECF0F1;
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer-logo .logo-icon {
  font-size: 2rem;
}

.footer-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-desc {
  margin-top: var(--spacing-sm);
  color: #BDC3C7;
  font-size: 0.9375rem;
}

.footer-links h4,
.footer-categories h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  color: #ECF0F1;
}

.footer-links ul,
.footer-categories ul {
  list-style: none;
}

.footer-links li,
.footer-categories li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a,
.footer-categories a {
  color: #BDC3C7;
  font-size: 0.9375rem;
}

.footer-links a:hover,
.footer-categories a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.875rem;
  color: #95A5A6;
}

.footer-disclaimer {
  margin-top: var(--spacing-xs);
  font-size: 0.8125rem;
}

/* ===== AdSense ===== */
.ad-container {
  margin: var(--spacing-lg) 0;
  text-align: center;
}

.ad-after-categories {
  padding: var(--spacing-md) 0;
  background: var(--color-bg-light);
}

.ad-before-footer {
  padding: var(--spacing-md) 0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-white);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: 0;
    border-bottom: 1px solid var(--color-border-light);
    display: none;
    box-shadow: var(--shadow-md);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .nav-menu li {
    border-bottom: 1px solid var(--color-border-light);
  }
  
  .nav-menu a {
    display: block;
    padding: var(--spacing-sm) 0;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .hero-subtitle {
    font-size: 1rem;
  }
  
  .post-layout {
    grid-template-columns: 1fr;
  }
  
  .post-sidebar {
    order: 0;
  }
  
  .toc-wrapper {
    position: static;
    margin-bottom: var(--spacing-md);
  }
  
  .post-title {
    font-size: 1.75rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-links,
  .footer-categories {
    text-align: center;
  }
  
  .posts-grid {
    grid-template-columns: 1fr;
  }
  
  .post-navigation .container {
    flex-direction: column;
  }
  
  .post-nav-next {
    text-align: left;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-base: 15px;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .hero {
    padding: var(--spacing-lg) 0;
  }
  
  .categories-grid {
    grid-template-columns: 1fr 1fr;
  }
}