/* ==========================================================================
   VAGA DESIGN SYSTEM — CXK ASSISTANT THEME (vg-html v3.5)
   MD3 Flat Tonal Surfaces | Dark Mode Support | Senior Accessibility First
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Work+Sans:wght@400;500;600;700&display=swap');

/* --- Light Mode Tokens (Mặc định) --- */
:root {
  --vaga-primary: #006949;
  --vaga-primary-dark: #123429;
  --vaga-primary-light: #2c6e59;
  --vaga-primary-bg: #e8f4f0;
  --vaga-on-primary: #ffffff;

  --vaga-accent: #f26121;
  --vaga-accent-dark: #c2410c;
  --vaga-accent-container: #ffedd5;
  --vaga-on-accent: #ffffff;

  --vaga-bg-body: #f8faf9;
  --vaga-bg-card: #ffffff;
  --vaga-bg-elevated: #f1f5f9;
  --vaga-bg-sidebar: #ffffff;
  --vaga-bg-hover: rgba(0, 105, 73, 0.06);

  --vaga-border: #e2e8f0;
  --vaga-border-strong: #cbd5e1;
  --vaga-border-focus: #006949;

  --vaga-text-primary: #1e293b;
  --vaga-text-secondary: #475569;
  --vaga-text-muted: #64748b;
  --vaga-text-inverse: #ffffff;

  --vaga-success: #16a34a;
  --vaga-success-bg: #dcfce7;
  --vaga-warning: #d97706;
  --vaga-warning-bg: #fef3c7;
  --vaga-danger: #dc2626;
  --vaga-danger-bg: #fee2e2;
  --vaga-info: #0284c7;
  --vaga-info-bg: #e0f2fe;

  --vaga-radius-xs: 4px;
  --vaga-radius-sm: 8px;
  --vaga-radius-md: 12px;
  --vaga-radius-lg: 16px;
  --vaga-radius-xl: 28px;
  --vaga-radius-pill: 9999px;

  --vaga-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --vaga-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
  --vaga-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

  --font-base: 'Work Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-size-base: 1rem;
  --line-height-base: 1.65;
  --container-max-width: 1280px;

  --duration-short: 150ms;
  --duration-standard: 250ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
}

/* --- Dark Mode Override Tokens --- */
[data-theme="dark"] {
  --vaga-primary: #34d399;
  --vaga-primary-dark: #6ee7b7;
  --vaga-primary-light: #10b981;
  --vaga-primary-bg: #064e3b;
  --vaga-on-primary: #064e3b;

  --vaga-accent: #fbbf24;
  --vaga-accent-dark: #f59e0b;
  --vaga-accent-container: #78350f;
  --vaga-on-accent: #78350f;

  --vaga-bg-body: #0f172a;
  --vaga-bg-card: #1e293b;
  --vaga-bg-elevated: #334155;
  --vaga-bg-sidebar: #1e293b;
  --vaga-bg-hover: rgba(52, 211, 153, 0.1);

  --vaga-border: #334155;
  --vaga-border-strong: #475569;
  --vaga-border-focus: #34d399;

  --vaga-text-primary: #f8fafc;
  --vaga-text-secondary: #cbd5e1;
  --vaga-text-muted: #94a3b8;
  --vaga-text-inverse: #0f172a;

  --vaga-success: #4ade80;
  --vaga-success-bg: #052e16;
  --vaga-warning: #facc15;
  --vaga-warning-bg: #422006;
  --vaga-danger: #f87171;
  --vaga-danger-bg: #450a0a;
  --vaga-info: #38bdf8;
  --vaga-info-bg: #082f49;

  --vaga-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --vaga-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--vaga-text-primary);
  background-color: var(--vaga-bg-body);
  transition: background-color var(--duration-standard) var(--ease-standard),
              color var(--duration-standard) var(--ease-standard);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Senior Accessibility Font Sizer */
body.font-large {
  font-size: 1.15rem;
}
body.font-xlarge {
  font-size: 1.3rem;
}

/* --- Reading Progress Bar --- */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  width: 0%;
  background: linear-gradient(90deg, var(--vaga-primary), var(--vaga-accent));
  z-index: 9999;
  transition: width 0.1s ease-out;
}

/* --- Navigation Bar --- */
.vaga-navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--vaga-bg-card);
  border-bottom: 1px solid var(--vaga-border);
  box-shadow: var(--vaga-shadow-sm);
  padding: 0 24px;
}

.navbar-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--vaga-text-primary);
}

.brand-logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--vaga-primary), var(--vaga-primary-dark));
  color: #ffffff;
  border-radius: var(--vaga-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.5px;
}

.brand-logo-img {
  width: 40px;
  height: 40px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--vaga-primary);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--vaga-text-muted);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--vaga-radius-pill);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.925rem;
  color: var(--vaga-text-secondary);
  transition: all var(--duration-short) var(--ease-standard);
}

.nav-link:hover {
  background-color: var(--vaga-bg-hover);
  color: var(--vaga-primary);
}

.nav-link.active {
  background-color: var(--vaga-primary-bg);
  color: var(--vaga-primary);
  font-weight: 600;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Action Buttons */
.btn-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 38px;
  padding: 0 12px;
  background-color: var(--vaga-bg-elevated);
  color: var(--vaga-text-secondary);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-pill);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-short) var(--ease-standard);
  text-decoration: none;
}

.btn-action:hover {
  border-color: var(--vaga-primary);
  color: var(--vaga-primary);
  background-color: var(--vaga-bg-hover);
}

.btn-theme-toggle {
  min-width: 80px;
}

/* --- Breadcrumb Navigation --- */
.breadcrumb-bar {
  background-color: var(--vaga-bg-card);
  border-bottom: 1px solid var(--vaga-border);
  padding: 10px 24px;
}

.breadcrumb-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
}

.breadcrumb-container a {
  color: var(--vaga-primary);
  text-decoration: none;
  font-weight: 500;
}

.breadcrumb-container a:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--vaga-text-muted);
}

.breadcrumb-current {
  color: var(--vaga-text-muted);
  font-weight: 600;
}

/* --- Main Layout --- */
.main-content {
  flex: 1;
  max-width: var(--container-max-width);
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px;
}

/* --- Hero Banner --- */
.hero-card {
  background: var(--vaga-bg-card);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-lg);
  padding: 36px;
  margin-bottom: 32px;
  box-shadow: var(--vaga-shadow-sm);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--vaga-primary), var(--vaga-accent));
}

.hero-badge-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--vaga-primary);
  line-height: 1.25;
  margin-bottom: 12px;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--vaga-text-secondary);
  max-width: 900px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.hero-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--vaga-text-muted);
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* --- KPI Scorecard Grid --- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-bottom: 32px;
}

.stat-card {
  background-color: var(--vaga-bg-card);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-md);
  padding: 22px;
  box-shadow: var(--vaga-shadow-sm);
  transition: border-color var(--duration-short) var(--ease-standard);
  display: flex;
  flex-direction: column;
}

.stat-card:hover {
  border-color: var(--vaga-primary);
}

.stat-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.stat-card__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--vaga-text-secondary);
}

.stat-card__value {
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--vaga-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-card__desc {
  font-size: 0.825rem;
  color: var(--vaga-text-muted);
}

/* --- Hub Grid & Cards --- */
.hub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 36px;
}

.hub-card {
  background-color: var(--vaga-bg-card);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-lg);
  padding: 24px;
  box-shadow: var(--vaga-shadow-sm);
  display: flex;
  flex-direction: column;
  transition: border-color var(--duration-short) var(--ease-standard);
  text-decoration: none;
  color: inherit;
}

.hub-card:hover {
  border-color: var(--vaga-primary);
}

.hub-card__icon {
  width: 48px;
  height: 48px;
  background-color: var(--vaga-primary-bg);
  color: var(--vaga-primary);
  border-radius: var(--vaga-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.hub-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--vaga-primary);
  margin-bottom: 8px;
}

.hub-card__desc {
  font-size: 0.95rem;
  color: var(--vaga-text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex: 1;
}

.hub-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--vaga-border);
  padding-top: 14px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--vaga-primary);
}

/* --- Article Detail View Layout --- */
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

.article-single-column {
  display: block;
}

.article-content {
  background-color: var(--vaga-bg-card);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-lg);
  padding: 40px;
  box-shadow: var(--vaga-shadow-sm);
  min-width: 0;
}

.article-header {
  border-bottom: 1px solid var(--vaga-border);
  padding-bottom: 24px;
  margin-bottom: 28px;
}

.article-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--vaga-primary);
  line-height: 1.3;
  margin-bottom: 12px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.875rem;
  color: var(--vaga-text-muted);
}

/* Sticky TOC Aside */
.toc-aside {
  position: sticky;
  top: 90px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  background-color: var(--vaga-bg-card);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-md);
  padding: 20px;
  box-shadow: var(--vaga-shadow-sm);
}

.toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--vaga-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toc-link {
  display: block;
  font-size: 0.85rem;
  color: var(--vaga-text-secondary);
  text-decoration: none;
  line-height: 1.4;
  padding: 4px 8px;
  border-radius: var(--vaga-radius-sm);
  transition: all var(--duration-short) var(--ease-standard);
}

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

.toc-link.indent-1 {
  padding-left: 18px;
  font-size: 0.8rem;
}

/* In-article collapsible TOC for mobile or single-col */
.article-toc-box {
  background-color: var(--vaga-primary-bg);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-md);
  padding: 16px 20px;
  margin: 24px 0 32px 0;
}

.article-toc-box summary {
  font-weight: 700;
  color: var(--vaga-primary);
  cursor: pointer;
  outline: none;
}

/* Typography Inside Articles */
.article-body h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--vaga-primary);
  margin-top: 36px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--vaga-border);
  scroll-margin-top: 85px;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--vaga-text-primary);
  margin-top: 26px;
  margin-bottom: 12px;
  scroll-margin-top: 85px;
}

.article-body h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--vaga-text-secondary);
  margin-top: 20px;
  margin-bottom: 8px;
  scroll-margin-top: 85px;
}

.article-body p {
  margin-bottom: 18px;
  color: var(--vaga-text-primary);
}

.article-body ul, .article-body ol {
  margin-bottom: 20px;
  padding-left: 28px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  border-left: 4px solid var(--vaga-primary);
  background-color: var(--vaga-primary-bg);
  padding: 14px 20px;
  border-radius: 0 var(--vaga-radius-md) var(--vaga-radius-md) 0;
  margin: 20px 0;
  font-style: italic;
  color: var(--vaga-text-secondary);
}

.article-body pre {
  background-color: #0f172a;
  color: #f8fafc;
  padding: 18px;
  border-radius: var(--vaga-radius-md);
  overflow-x: auto;
  font-family: Consolas, Monaco, 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 20px 0;
}

.article-body code:not(pre code) {
  background-color: var(--vaga-bg-elevated);
  color: var(--vaga-primary);
  padding: 2px 6px;
  border-radius: var(--vaga-radius-xs);
  font-family: Consolas, Monaco, 'Courier New', monospace;
  font-size: 0.88em;
}

/* --- Tables & Wrappers --- */
.vaga-table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 24px 0;
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-md);
  box-shadow: var(--vaga-shadow-sm);
  background-color: var(--vaga-bg-card);
}

.vaga-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.925rem;
}

.vaga-table th {
  background-color: var(--vaga-primary-bg);
  color: var(--vaga-primary-dark);
  font-weight: 600;
  padding: 14px 18px;
  border-bottom: 2px solid var(--vaga-border);
  white-space: nowrap;
}

.vaga-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--vaga-border);
  color: var(--vaga-text-primary);
  vertical-align: top;
}

.vaga-table tr:nth-child(even) td {
  background-color: var(--vaga-bg-body);
}

.vaga-table tr:hover td {
  background-color: var(--vaga-bg-hover);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--vaga-radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge--primary {
  background-color: var(--vaga-primary-bg);
  color: var(--vaga-primary);
}

.badge--accent {
  background-color: var(--vaga-accent-container);
  color: var(--vaga-accent-dark);
}

.badge--success {
  background-color: var(--vaga-success-bg);
  color: var(--vaga-success);
}

.badge--warning {
  background-color: var(--vaga-warning-bg);
  color: var(--vaga-warning);
}

.badge--danger {
  background-color: var(--vaga-danger-bg);
  color: var(--vaga-danger);
}

/* --- Disclaimer Box --- */
.disclaimer-box {
  background-color: var(--vaga-warning-bg);
  border: 1px solid var(--vaga-warning);
  border-radius: var(--vaga-radius-md);
  padding: 20px;
  margin: 32px 0;
  display: flex;
  gap: 16px;
  color: var(--vaga-text-primary);
}

.disclaimer-icon {
  font-size: 1.8rem;
  line-height: 1;
}

.disclaimer-content h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--vaga-warning);
}

.disclaimer-content p {
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 0;
}

/* --- Search & Filter Modal --- */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 2000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 24px;
}

.search-modal.is-active {
  display: flex;
}

.search-modal-container {
  background-color: var(--vaga-bg-card);
  border: 1px solid var(--vaga-border);
  border-radius: var(--vaga-radius-lg);
  box-shadow: var(--vaga-shadow-lg);
  width: 100%;
  max-width: 680px;
  overflow: hidden;
  animation: modalSlideDown 0.2s ease-out;
}

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

.search-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--vaga-border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-input {
  width: 100%;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 1.15rem;
  background: transparent;
  color: var(--vaga-text-primary);
}

.search-results {
  max-height: 420px;
  overflow-y: auto;
  padding: 12px;
}

.search-result-item {
  display: block;
  padding: 12px 16px;
  border-radius: var(--vaga-radius-md);
  text-decoration: none;
  color: var(--vaga-text-primary);
  transition: background-color var(--duration-short) var(--ease-standard);
  margin-bottom: 4px;
}

.search-result-item:hover {
  background-color: var(--vaga-bg-hover);
}

.search-result-title {
  font-weight: 600;
  color: var(--vaga-primary);
  margin-bottom: 4px;
}

.search-result-snippet {
  font-size: 0.85rem;
  color: var(--vaga-text-muted);
}

/* --- Back to Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background-color: var(--vaga-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--vaga-radius-pill);
  box-shadow: var(--vaga-shadow-md);
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  cursor: pointer;
  z-index: 900;
  transition: transform var(--duration-short) var(--ease-standard);
}

.back-to-top:hover {
  transform: translateY(-3px);
}

.back-to-top.show {
  display: flex;
}

/* --- Footer --- */
.vaga-footer {
  background-color: var(--vaga-bg-card);
  border-top: 1px solid var(--vaga-border);
  padding: 40px 24px 24px;
  margin-top: 48px;
}

.footer-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand h3 {
  color: var(--vaga-primary);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.footer-brand p {
  color: var(--vaga-text-muted);
  font-size: 0.9rem;
  max-width: 420px;
  line-height: 1.5;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--vaga-text-primary);
  margin-bottom: 12px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col a {
  color: var(--vaga-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--duration-short) var(--ease-standard);
}

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

.footer-bottom {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--vaga-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: var(--vaga-text-muted);
}

/* --- Responsive Adjustments --- */
@media (max-width: 992px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .toc-aside {
    display: none;
  }
  .footer-container {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .vaga-navbar {
    padding: 0 16px;
  }
  .navbar-container {
    height: auto;
    padding: 12px 0;
    flex-wrap: wrap;
  }
  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-top: 8px;
    gap: 4px;
  }
  .hero-card {
    padding: 24px;
  }
  .hero-title {
    font-size: 1.6rem;
  }
  .article-content {
    padding: 24px;
  }
  .footer-container {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}