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

:root {
  --color-primary: #0A1628;
  --color-accent: #00D4AA;
  --color-accent-dark: #00B894;
  --color-bg: #F8FAFC;
  --color-card: #FFFFFF;
  --font-body: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --shadow-card: 0 4px 20px rgba(10, 22, 40, 0.08);
  --shadow-card-hover: 0 8px 30px rgba(10, 22, 40, 0.15);
}

html { overflow-x: hidden; }
body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}
* { word-break: keep-all; overflow-wrap: break-word; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; }

/* ===== Layout ===== */
.main-content { flex: 1; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 1rem; }
.container-narrow { max-width: 896px; margin: 0 auto; padding: 0 1rem; }

@media (min-width: 640px) {
  .container, .container-narrow { padding: 0 1.5rem; }
}
@media (min-width: 1024px) {
  .container, .container-narrow { padding: 0 2rem; }
}

/* ===== Header ===== */
.site-header {
  background: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 2px 10px rgba(0,0,0,0.2);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}
@media (min-width: 640px) { .header-inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .header-inner { padding: 0 2rem; } }

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.logo-text {
  font-size: 1.5rem;
  font-weight: 900;
  font-family: var(--font-heading);
  letter-spacing: -0.025em;
}
.logo-sub {
  font-size: 0.875rem;
  color: var(--color-accent);
}
@media (max-width: 639px) { .logo-sub { display: none; } }

/* Desktop Nav */
.desktop-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}
@media (min-width: 768px) { .desktop-nav { display: flex; } }

.nav-group { position: relative; }
.nav-btn {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #d1d5db;
  background: none;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
  font-family: var(--font-body);
}
.nav-btn:hover { color: #fff; background: rgba(255,255,255,0.1); }

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.25rem;
  width: 11rem;
  background: #fff;
  border-radius: 0.75rem;
  box-shadow: 0 10px 40px rgba(0,0,0,0.15);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  z-index: 50;
  padding: 0.5rem 0;
}
.nav-group:hover .nav-dropdown { opacity: 1; visibility: visible; }
.nav-dropdown a {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  color: #374151;
  transition: background 0.15s, color 0.15s;
}
.nav-dropdown a:hover {
  background: rgba(0, 212, 170, 0.1);
  color: var(--color-primary);
}

/* Mobile Toggle */
.mobile-toggle {
  display: flex;
  padding: 0.5rem;
  background: none;
  border: none;
  border-radius: 0.5rem;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s;
}
.mobile-toggle:hover { background: rgba(255,255,255,0.1); }
@media (min-width: 768px) { .mobile-toggle { display: none; } }

/* Mobile Menu */
.mobile-menu {
  display: none;
  background: var(--color-primary);
  border-top: 1px solid rgba(255,255,255,0.1);
}
.mobile-menu.active { display: block; }
@media (min-width: 768px) { .mobile-menu { display: none !important; } }

.mobile-menu-inner { padding: 0.75rem 1rem; }
.mobile-section { margin-bottom: 0.25rem; }
.mobile-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
}
.mobile-section a {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: #d1d5db;
  border-radius: 0.5rem;
  transition: color 0.15s, background 0.15s;
}
.mobile-section a:hover { color: #fff; background: rgba(255,255,255,0.1); }
.mobile-blog-link {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: 0.75rem;
  padding-top: 0.75rem;
}
.mobile-blog-link a { font-weight: 500; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary);
  color: #9ca3af;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 3rem 1rem;
}
@media (min-width: 640px) { .footer-inner { padding: 3rem 1.5rem; } }
@media (min-width: 1024px) { .footer-inner { padding: 3rem 2rem; } }

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}
@media (min-width: 768px) { .footer-links { grid-template-columns: repeat(4, 1fr); } }
.footer-col h3 {
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}
.footer-col ul { list-style: none; padding: 0; }
.footer-col li { margin-bottom: 0.5rem; }
.footer-col a {
  font-size: 0.875rem;
  color: #9ca3af;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
}
.footer-disclaimer {
  font-size: 0.75rem;
  color: #6b7280;
  margin-bottom: 0.5rem;
}
.footer-policy-links {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.footer-policy-links a {
  font-size: 0.75rem;
  color: #6b7280;
  transition: color 0.2s;
}
.footer-policy-links a:hover { color: var(--color-accent); }
.footer-copyright {
  font-size: 0.75rem;
  color: #6b7280;
}

/* ===== Calculator Card ===== */
.calculator-card {
  background: var(--color-card);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-card);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  display: block;
}
.calculator-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
}

.card-category {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}
.card-icon { font-size: 1.875rem; margin-bottom: 0.75rem; }
.card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}
.card-desc { font-size: 0.875rem; color: #6b7280; }

/* ===== Calculator Input ===== */
.calc-input {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
  -webkit-appearance: none;
  appearance: none;
  padding: 0.75rem 1rem;
  border: 2px solid #E2E8F0;
  border-radius: 0.75rem;
  font-size: 1rem;
  font-family: var(--font-body);
  transition: border-color 0.2s, box-shadow 0.2s;
  background: #fff;
}
.calc-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

.calc-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 0.75rem 1rem;
  border: 2px solid #E2E8F0;
  border-radius: 0.75rem;
  font-size: 1rem;
  font-family: var(--font-body);
  transition: border-color 0.2s;
  background: #fff;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em;
}
.calc-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15);
}

.calc-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #475569;
  margin-bottom: 0.375rem;
}

/* ===== Calculator Button ===== */
.calc-button {
  width: 100%;
  padding: 0.875rem;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  border: none;
  border-radius: 0.75rem;
  font-size: 1.1rem;
  font-weight: 700;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s;
}
.calc-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(0, 212, 170, 0.4);
}
.calc-button:active { transform: translateY(0); }

/* ===== Result Card ===== */
.result-card {
  background: linear-gradient(135deg, var(--color-primary) 0%, #1a2744 100%);
  border-radius: 1rem;
  padding: 1.5rem;
  color: #fff;
}
.result-highlight {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-accent);
  font-family: var(--font-heading);
}

/* ===== Table ===== */
.calc-table {
  width: 100%;
  border-collapse: collapse;
}
.calc-table th {
  background: #F1F5F9;
  padding: 0.75rem;
  text-align: left;
  font-size: 0.85rem;
  font-weight: 600;
  color: #475569;
  border-bottom: 2px solid #E2E8F0;
}
.calc-table td {
  padding: 0.75rem;
  font-size: 0.9rem;
  border-bottom: 1px solid #F1F5F9;
}
.calc-table tr:hover td { background: #F8FAFC; }
.calc-table .text-right { text-align: right; }
.calc-table .font-bold { font-weight: 700; }

/* ===== Calculator Layout ===== */
.calc-page { padding: 2rem 0; }
.calc-page-inner { max-width: 896px; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .calc-page-inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .calc-page-inner { padding: 0 2rem; } }

/* Breadcrumb */
.breadcrumb {
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: #6b7280;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}
.breadcrumb a { transition: color 0.15s; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .separator { margin: 0 0.25rem; }
.breadcrumb .current { color: var(--color-primary); font-weight: 500; }

/* Page Title */
.page-title {
  font-size: 1.875rem;
  font-weight: 900;
  color: var(--color-primary);
  font-family: var(--font-heading);
  margin-bottom: 0.75rem;
}
@media (min-width: 768px) { .page-title { font-size: 2.25rem; } }

.page-description {
  font-size: 1.125rem;
  color: #4b5563;
  margin-bottom: 2rem;
}

/* Calculator Box */
.calc-box {
  background: #fff;
  border-radius: 1rem;
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  margin-bottom: 2rem;
  overflow: hidden;
}
@media (min-width: 768px) { .calc-box { padding: 2rem; } }

/* Form Spacing */
.form-group { margin-bottom: 1rem; }
.form-row { display: flex; gap: 1rem; }
.form-row > * { flex: 1; }

/* Quick Buttons */
.quick-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}
.quick-btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
  border-radius: 0.5rem;
  border: 1px solid #e2e8f0;
  background: #fff;
  color: #4b5563;
  cursor: pointer;
  font-family: var(--font-body);
  transition: border-color 0.15s, color 0.15s;
}
.quick-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* Korean Amount Hint */
.korean-hint {
  font-size: 0.75rem;
  color: #3b82f6;
  margin-top: 0.25rem;
  font-weight: 500;
}

/* SEO Content Box */
.seo-box {
  background: #f8fafc;
  border-radius: 1rem;
  padding: 1.5rem;
  margin-bottom: 2rem;
}
@media (min-width: 768px) { .seo-box { padding: 2rem; } }
.seo-box h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.seo-box p, .seo-box li {
  font-size: 0.875rem;
  color: #4b5563;
  line-height: 1.7;
  margin-bottom: 0.75rem;
}
.seo-box ul { list-style: disc; padding-left: 1.5rem; }
.seo-box li { margin-bottom: 0.25rem; }

/* FAQ */
.faq-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.faq-item {
  background: #fff;
  border-radius: 0.75rem;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  border: 1px solid #f1f5f9;
  margin-bottom: 1rem;
}
.faq-item h3 {
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}
.faq-item p {
  font-size: 0.875rem;
  color: #4b5563;
  line-height: 1.6;
}

/* Related Calculators */
.related-calcs h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}
@media (min-width: 768px) { .related-grid { grid-template-columns: repeat(3, 1fr); } }
.related-link {
  background: #fff;
  border-radius: 0.75rem;
  padding: 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  border: 1px solid #f1f5f9;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
  display: block;
}
.related-link:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* ===== Home Page ===== */
.hero-section { text-align: center; margin-bottom: 3rem; }
.hero-title {
  font-size: 2.25rem;
  font-weight: 900;
  font-family: var(--font-heading);
  margin-bottom: 1rem;
}
@media (min-width: 768px) { .hero-title { font-size: 3.75rem; } }
.hero-title .primary { color: var(--color-primary); }
.hero-title .accent { color: var(--color-accent); }
.hero-subtitle {
  font-size: 1.125rem;
  color: #6b7280;
  max-width: 42rem;
  margin: 0 auto 2rem;
}
.search-box { max-width: 28rem; margin: 0 auto; }
.search-box .calc-input { text-align: center; }

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
@media (min-width: 768px) { .card-grid { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; } }
@media (min-width: 1024px) { .card-grid { grid-template-columns: repeat(4, 1fr); } }

/* Recent Posts Section */
.recent-section { margin-bottom: 3rem; }
.recent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.recent-header h2 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  font-family: var(--font-heading);
}
.recent-header a {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
  transition: color 0.15s;
}
.recent-header a:hover { color: var(--color-accent-dark); }

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 640px) { .blog-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .blog-grid { grid-template-columns: repeat(4, 1fr); } }

/* Blog Card */
.blog-card { display: block; }
.blog-card:hover { border-color: var(--color-accent); }
.blog-card-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  background: rgba(0, 212, 170, 0.1);
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
}
.blog-card-title {
  font-weight: 700;
  color: var(--color-primary);
  margin-top: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.blog-card-title.compact { font-size: 1rem; margin-bottom: 0.25rem; }
.blog-card-title.full { font-size: 1.125rem; margin-bottom: 0.5rem; }
.blog-card-desc {
  font-size: 0.875rem;
  color: #6b7280;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0.75rem;
}
.blog-card-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: #9ca3af;
}
.blog-card-meta .dot { color: #d1d5db; }

/* ===== Deduction Bar Chart ===== */
.deduction-bars { display: flex; flex-direction: column; gap: 0.5rem; }
.deduction-row { display: flex; align-items: center; gap: 0.75rem; }
.deduction-label { width: 6rem; font-size: 0.875rem; color: #4b5563; flex-shrink: 0; }
.deduction-bar-bg {
  flex: 1;
  background: #f1f5f9;
  border-radius: 9999px;
  height: 1.5rem;
  overflow: hidden;
}
.deduction-bar {
  height: 100%;
  border-radius: 9999px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 0.5rem;
  font-size: 0.75rem;
  color: #fff;
  font-weight: 500;
  min-width: 8%;
}
.deduction-total {
  margin-top: 0.75rem;
  text-align: right;
}
.deduction-total .label { font-size: 0.875rem; color: #6b7280; }
.deduction-total .value { font-weight: 700; color: var(--color-primary); }

/* ===== Blog Page ===== */
.blog-page { padding: 2rem 0; }
.blog-page-inner { max-width: 896px; margin: 0 auto; padding: 0 1rem; }
@media (min-width: 640px) { .blog-page-inner { padding: 0 1.5rem; } }
@media (min-width: 1024px) { .blog-page-inner { padding: 0 2rem; } }

.category-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.category-btn {
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: var(--font-body);
  text-decoration: none;
  display: inline-block;
}
.category-btn.active {
  background: var(--color-primary);
  color: #fff;
}
.category-btn:not(.active) {
  background: #f1f5f9;
  color: #4b5563;
}
.category-btn:not(.active):hover { background: #e2e8f0; }

.blog-list-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
@media (min-width: 768px) { .blog-list-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; } }

/* Blog Post */
.blog-post-header { margin-bottom: 2rem; }
.blog-post-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.75rem; }
.tag-badge {
  font-size: 0.75rem;
  color: #9ca3af;
  background: #f1f5f9;
  padding: 0.125rem 0.5rem;
  border-radius: 9999px;
}
.blog-post-title {
  font-size: 1.875rem;
  font-weight: 900;
  color: var(--color-primary);
  font-family: var(--font-heading);
  margin-bottom: 1rem;
  line-height: 1.3;
}
@media (min-width: 768px) { .blog-post-title { font-size: 2.25rem; } }
.blog-post-desc { color: #6b7280; font-size: 1.125rem; margin-bottom: 1rem; }
.blog-post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: #9ca3af;
}

/* Blog Prose */
.blog-prose {
  background: #fff;
  border-radius: 1rem;
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
  margin-bottom: 2rem;
  font-size: 1rem;
  line-height: 1.9;
  color: #374151;
}
@media (min-width: 768px) { .blog-prose { padding: 2.5rem; } }
.blog-prose h2 { font-size: 1.5rem; font-weight: 700; margin-top: 2.5rem; margin-bottom: 0.75rem; color: var(--color-primary); padding-bottom: 0.5rem; border-bottom: 2px solid #f1f5f9; }
.blog-prose h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.75rem; margin-bottom: 0.5rem; color: var(--color-primary); }
.blog-prose h4 { font-size: 1.1rem; font-weight: 600; margin-top: 1.5rem; margin-bottom: 0.5rem; color: #1e293b; }
.blog-prose p { margin-bottom: 1.25rem; line-height: 1.9; }
.blog-prose ul, .blog-prose ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
.blog-prose ul { list-style-type: disc; }
.blog-prose ol { list-style-type: decimal; }
.blog-prose li { margin-bottom: 0.375rem; line-height: 1.8; }
.blog-prose a { color: var(--color-accent-dark); text-decoration: underline; text-underline-offset: 2px; }
.blog-prose a:hover { color: var(--color-accent); }
.blog-prose blockquote { border-left: 4px solid var(--color-accent); padding: 0.75rem 1rem; margin: 1.5rem 0; background: #f8fafc; border-radius: 0 0.5rem 0.5rem 0; color: #4b5563; }
.blog-prose blockquote p { margin-bottom: 0; }
.blog-prose code { background: #f1f5f9; padding: 0.15rem 0.4rem; border-radius: 0.25rem; font-size: 0.875em; color: #e11d48; }
.blog-prose pre { background: var(--color-primary); color: #e2e8f0; padding: 1.25rem; border-radius: 0.75rem; overflow-x: auto; margin-bottom: 1.5rem; font-size: 0.875rem; line-height: 1.6; }
.blog-prose pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.blog-prose img { border-radius: 0.75rem; max-width: 100%; height: auto; margin: 1.5rem 0; box-shadow: var(--shadow-card); }
.blog-prose table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; font-size: 0.9rem; }
.blog-prose th, .blog-prose td { padding: 0.625rem 0.75rem; border-bottom: 1px solid #e2e8f0; text-align: left; }
.blog-prose th { background: #f1f5f9; font-weight: 600; color: #475569; }
.blog-prose tr:hover td { background: #f8fafc; }
.blog-prose hr { border: none; border-top: 2px solid #f1f5f9; margin: 2rem 0; }
.blog-prose strong { font-weight: 700; color: var(--color-primary); }

/* ===== Category Hub Pages ===== */
.hub-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 768px) { .hub-grid { grid-template-columns: repeat(2, 1fr); } }
.hub-card {
  background: #fff;
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: var(--shadow-card);
  border: 1px solid transparent;
  transition: all 0.3s;
  display: block;
}
.hub-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); border-color: var(--color-accent); }
.hub-card-icon { font-size: 2.5rem; margin-bottom: 1rem; }
.hub-card-title { font-size: 1.25rem; font-weight: 700; color: var(--color-primary); margin-bottom: 0.5rem; }
.hub-card-desc { font-size: 0.875rem; color: #6b7280; }

/* ===== AdSense Placeholder ===== */
.adsense-container { margin: 1.5rem 0; min-height: 1px; }

/* ===== Utility Classes ===== */
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.text-red { color: #ef4444; }
.text-gray { color: #6b7280; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.hidden { display: none; }
.overflow-x-auto { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Checkbox / Radio styled as toggle */
.toggle-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.toggle-btn {
  padding: 0.5rem 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 0.75rem;
  background: #fff;
  font-size: 0.875rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.15s;
  color: #4b5563;
}
.toggle-btn.active, .toggle-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(0, 212, 170, 0.05);
}

/* Tabs */
.tab-group { display: flex; border-bottom: 2px solid #e2e8f0; margin-bottom: 1.5rem; }
.tab-btn {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-body);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  color: #6b7280;
  cursor: pointer;
  transition: all 0.15s;
}
.tab-btn.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.tab-btn:hover { color: var(--color-primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .result-highlight { font-size: 1.5rem; }
  .calculator-card { padding: 1rem; }
  .calc-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .calc-table th, .calc-table td { padding: 0.5rem 0.375rem; font-size: 0.8rem; white-space: nowrap; }
  .calc-table th { font-size: 0.75rem; }
  .calc-input, .calc-select { font-size: 16px; }
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 4rem 0;
  color: #9ca3af;
  font-size: 1.125rem;
}

/* No results */
.no-results { text-align: center; color: #9ca3af; margin-top: 3rem; }