/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --font-serif: 'Merriweather', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --color-black: #000000;
  --color-gray-900: #111827;
  --color-gray-800: #1f2937;
  --color-gray-700: #374151;
  --color-gray-600: #4b5563;
  --color-gray-500: #6b7280;
  --color-gray-400: #9ca3af;
  --color-gray-300: #d1d5db;
  --color-gray-200: #e5e7eb;
  --color-gray-100: #f3f4f6;
  --color-gray-50: #f9fafb;
  --color-white: #ffffff;
  
  --color-blue-600: #2563eb;
  --color-blue-50: #eff6ff;
  --color-green-700: #15803d;
  --color-green-600: #16a34a;
  --color-green-50: #f0fdf4;
  --color-yellow-800: #854d0e;
  --color-yellow-400: #facc15;
  --color-yellow-100: #fef3c7;
  --color-yellow-50: #fefce8;
  
  --max-width: 896px;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-700);
  background-color: var(--color-gray-100);
  min-height: 100vh;
}

/* ==========================================================================
   Container & Layout
   ========================================================================== */

.article-container {
  max-width: var(--max-width);
  margin: 0 auto;
  background-color: var(--color-white);
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  border-left: 1px solid var(--color-gray-200);
  border-right: 1px solid var(--color-gray-200);
}

/* ==========================================================================
   Header Styles
   ========================================================================== */

.header-accent {
  background-color: var(--color-black);
  height: 12px;
  width: 100%;
}

.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-800);
  padding: 1.5rem;
}

@media (min-width: 640px) {
  .site-header {
    padding: 2rem 2.5rem;
  }
}

.site-title-wrapper {
  text-align: center;
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

@media (min-width: 640px) {
  .site-title-wrapper {
    padding-bottom: 1.25rem;
    margin-bottom: 1.25rem;
  }
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-gray-900);
  margin-bottom: 0.5rem;
}

@media (min-width: 640px) {
  .site-title {
    font-size: 1.875rem;
  }
}

.site-tagline {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gray-500);
  font-weight: 500;
  margin-top: 0.5rem;
}

.advertorial-label {
  font-size: 0.75rem;
  color: var(--color-gray-400);
  font-family: var(--font-sans);
  margin-bottom: 0.75rem;
}

.publication-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--color-gray-600);
  border-bottom: 1px solid var(--color-gray-300);
  padding-bottom: 0.5rem;
}

@media (min-width: 640px) {
  .publication-info {
    flex-direction: row;
    justify-content: space-between;
    gap: 0;
  }
}

/* ==========================================================================
   Article Header
   ========================================================================== */

.article-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--color-gray-200);
}

@media (min-width: 640px) {
  .article-header {
    padding: 2.5rem;
  }
}

.article-category {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-200);
  padding-bottom: 0.5rem;
  margin-bottom: 1rem;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  line-height: 1.25;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .article-title {
    font-size: 2.25rem;
  }
}

.author-section {
  display: flex;
  align-items: flex-start;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-gray-200);
  padding-bottom: 1.25rem;
}

.author-avatar {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  margin-right: 1rem;
  border: 1px solid var(--color-gray-300);
}

.author-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.author-info {
  flex: 1;
}

.author-name-wrapper {
  display: flex;
  align-items: center;
  margin-bottom: 0.25rem;
}

.author-name {
  font-weight: 500;
  color: var(--color-gray-900);
  font-size: 1.125rem;
}

.verified-badge {
  display: flex;
  align-items: center;
  margin-left: 0.5rem;
  color: var(--color-blue-600);
  font-size: 0.75rem;
  font-weight: 500;
}

.verified-icon {
  width: 1rem;
  height: 1rem;
  margin-right: 0.25rem;
}

.author-title {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  margin-bottom: 0.5rem;
}

.article-meta {
  display: flex;
  font-size: 0.75rem;
  color: var(--color-gray-500);
  align-items: center;
}

.meta-item {
  display: flex;
  align-items: center;
  margin-right: 1rem;
}

.meta-icon {
  width: 0.75rem;
  height: 0.75rem;
  margin-right: 0.25rem;
}

.article-lede {
  font-family: var(--font-serif);
  color: var(--color-gray-700);
  font-size: 1rem;
  line-height: 1.625;
  margin-bottom: 1.5rem;
  border-left: 4px solid var(--color-gray-300);
  padding-left: 1rem;
  font-style: italic;
}

@media (min-width: 640px) {
  .article-lede {
    font-size: 1.125rem;
  }
}

.publication-meta {
  border-top: 1px solid var(--color-gray-200);
  padding-top: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-gray-500);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem;
}

/* ==========================================================================
   Author Bio Section
   ========================================================================== */

.author-bio-section {
  padding: 1.5rem;
  border-bottom: 1px solid var(--color-gray-200);
}

@media (min-width: 640px) {
  .author-bio-section {
    padding: 2.5rem;
  }
}

.author-bio {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 640px) {
  .author-bio {
    flex-direction: row;
    align-items: center;
  }
}

.author-bio-image {
  width: 100%;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

@media (min-width: 640px) {
  .author-bio-image {
    width: 33.333%;
    margin-right: 1.5rem;
  }
}

.author-bio-text {
  flex: 1;
}

.author-bio-text p {
  font-size: 0.875rem;
  color: var(--color-gray-700);
  margin-bottom: 0.5rem;
}

.author-bio-text p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.article-content {
  padding: 2rem 1.5rem;
}

@media (min-width: 640px) {
  .article-content {
    padding: 2.5rem;
  }
}

.content-meta {
  display: flex;
  font-size: 0.75rem;
  color: var(--color-gray-500);
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-gray-200);
  padding-bottom: 0.5rem;
}

.content-meta-item {
  display: flex;
  align-items: center;
  margin-right: 1rem;
}

.content-meta-icon {
  width: 0.75rem;
  height: 0.75rem;
  margin-right: 0.25rem;
}

/* Typography */

.article-content p {
  margin-bottom: 1.25rem;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-gray-700);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-800);
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-gray-800);
  padding-bottom: 0.5rem;
  display: flex;
  align-items: center;
}

.article-content h2::before {
  content: '';
  display: inline-block;
  width: 1rem;
  height: 1rem;
  background-color: var(--color-gray-800);
  margin-right: 0.75rem;
  flex-shrink: 0;
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gray-800);
  margin-top: 2rem;
  margin-bottom: 1rem;
}

/* Images */

.content-image-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .content-image-wrapper {
    flex-direction: row;
    align-items: center;
  }
}

.content-image-col {
  flex: 1;
}

.content-image-col.half {
  width: 100%;
}

@media (min-width: 640px) {
  .content-image-col.half {
    width: 50%;
  }
}

.content-image-col.third {
  width: 100%;
}

@media (min-width: 640px) {
  .content-image-col.third {
    width: 33.333%;
    margin-right: 1.5rem;
  }
}

.content-image-col.two-thirds {
  width: 100%;
}

@media (min-width: 640px) {
  .content-image-col.two-thirds {
    width: 66.667%;
  }
}

.content-image {
  width: 100%;
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Sidebar/Callout Boxes */

.sidebar-box {
  background-color: var(--color-gray-50);
  padding: 1.25rem;
  border-radius: 0.25rem;
  border: 1px solid var(--color-gray-300);
  font-size: 0.875rem;
  margin-top: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .sidebar-box {
    margin-top: 0;
  }
}

.sidebar-box-title {
  text-transform: uppercase;
  color: var(--color-gray-600);
  font-size: 0.75rem;
  font-family: var(--font-sans);
  letter-spacing: 0.05em;
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-300);
  padding-bottom: 0.5rem;
  margin-bottom: 0.75rem;
}

.sidebar-box ul {
  list-style: none;
}

.sidebar-box li {
  display: flex;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  color: var(--color-gray-700);
}

.sidebar-box li:last-child {
  margin-bottom: 0;
}

.check-icon {
  width: 1rem;
  height: 1rem;
  color: var(--color-gray-700);
  flex-shrink: 0;
  margin-right: 0.5rem;
  margin-top: 0.125rem;
}

/* Callout Boxes */

.callout {
  border-left: 4px solid;
  padding: 1rem 1.25rem;
  margin: 2rem 0;
  border-radius: 0 0.25rem 0.25rem 0;
}

.callout p {
  margin-bottom: 0.75rem;
}

.callout p:last-child {
  margin-bottom: 0;
}

.callout.yellow {
  border-color: var(--color-yellow-400);
  background-color: var(--color-yellow-50);
}

.callout.green {
  border-color: var(--color-green-600);
  background-color: var(--color-green-50);
}

.callout.blue {
  border-color: var(--color-blue-600);
  background-color: var(--color-blue-50);
}

.callout.gray {
  border-color: var(--color-gray-300);
  background-color: var(--color-gray-50);
}

.highlight {
  background-color: var(--color-yellow-100);
  padding: 0.5rem;
  display: inline-block;
  margin: 0.5rem 0;
}

/* Timeline */

.timeline-item {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background-color: var(--color-gray-800);
  border: 2px solid var(--color-white);
  margin-left: -0.5rem;
}

.timeline-content {
  background-color: var(--color-gray-50);
  padding: 1.25rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-gray-300);
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.timeline-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gray-800);
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-gray-200);
  padding-bottom: 0.5rem;
}

/* Testimonials */

.testimonial {
  border-left: 2px solid var(--color-gray-800);
  padding-left: 1.25rem;
  padding-top: 1rem;
  padding-bottom: 1rem;
  margin: 1.5rem 0;
  background-color: var(--color-gray-50);
  border-radius: 0 0.25rem 0.25rem 0;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.testimonial-quote {
  font-family: var(--font-serif);
  color: var(--color-gray-700);
  font-style: italic;
  margin-bottom: 1rem;
  line-height: 1.625;
  font-size: 1rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  border-top: 1px solid var(--color-gray-200);
  padding-top: 0.75rem;
}

.testimonial-avatar {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background-color: var(--color-gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.user-icon {
  width: 0.75rem;
  height: 0.75rem;
  color: var(--color-gray-600);
}

.testimonial-info {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  flex: 1;
}

.testimonial-name {
  font-weight: 500;
  color: var(--color-gray-800);
}

.testimonial-verified {
  display: flex;
  align-items: center;
  color: var(--color-green-600);
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid #bbf7d0;
  border-radius: 9999px;
  padding: 0.125rem 0.5rem;
  background-color: var(--color-green-50);
  margin-left: 0.5rem;
}

.testimonial-verified svg {
  width: 0.75rem;
  height: 0.75rem;
  margin-right: 0.25rem;
}

/* Blockquote */

blockquote {
  font-family: var(--font-serif);
  font-style: italic;
  border-left: 3px solid var(--color-gray-400);
  padding: 1rem 1.25rem;
  margin: 2rem 0;
  background-color: var(--color-yellow-50);
  border-radius: 0 0.25rem 0.25rem 0;
  color: var(--color-gray-700);
}

blockquote .attribution {
  font-size: 0.875rem;
  margin-top: 0.75rem;
  color: var(--color-gray-600);
  font-style: normal;
}

/* Product Card/CTA */

.product-card {
  border: 1px solid var(--color-gray-300);
  border-radius: 0.5rem;
  padding: 1rem;
  background-color: var(--color-white);
  margin: 2rem auto;
  max-width: 28rem;
}

.product-label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: 0.5rem;
}

.product-label svg {
  width: 0.875rem;
  height: 0.875rem;
  color: var(--color-gray-600);
}

.product-label span {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.product-title {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-gray-900);
  margin-bottom: 0.375rem;
}

.product-pricing {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  margin-bottom: 0.75rem;
}

.product-price-old {
  font-size: 0.875rem;
  color: var(--color-gray-400);
  text-decoration: line-through;
}

.product-price-new {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-green-600);
}

.product-badge {
  background-color: var(--color-yellow-100);
  color: var(--color-yellow-800);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: 0.25rem;
}

.product-cta {
  display: block;
  width: 100%;
  background-color: var(--color-gray-900);
  color: var(--color-white);
  font-weight: 500;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.25rem;
  text-align: center;
  text-decoration: none;
  transition: background-color 0.2s;
}

.product-cta:hover {
  background-color: var(--color-gray-800);
}

.product-cta-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.product-cta svg {
  width: 1rem;
  height: 1rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.article-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--color-gray-200);
  background-color: var(--color-gray-50);
}

@media (min-width: 640px) {
  .article-footer {
    padding: 2.5rem;
  }
}

.disclaimer {
  font-size: 0.625rem;
  color: var(--color-gray-400);
  line-height: 1.4;
}

.disclaimer p {
  margin-bottom: 0.5rem;
}

.disclaimer p:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   Utilities
   ========================================================================== */

.text-bold {
  font-weight: 700;
}

.text-italic {
  font-style: italic;
}

.text-center {
  text-align: center;
}

.mb-small {
  margin-bottom: 0.5rem;
}

.mb-medium {
  margin-bottom: 1rem;
}

.mb-large {
  margin-bottom: 2rem;
}

/* ==========================================================================
   Responsive Utilities
   ========================================================================== */

.content-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

@media (min-width: 640px) {
  .content-grid {
    flex-direction: row;
  }
}

.content-grid-main {
  flex: 1;
}

@media (min-width: 640px) {
  .content-grid-main {
    width: 66.666%;
  }
}

.content-grid-sidebar {
  flex: 1;
}

@media (min-width: 640px) {
  .content-grid-sidebar {
    width: 33.333%;
  }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
  body {
    background-color: white;
  }
  
  .article-container {
    box-shadow: none;
    border: none;
  }
  
  .product-cta {
    display: none;
  }
}