/* AI Leapers - Professional Affiliate Review Blog Styles */

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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-bg-card: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #555770;
  --color-text-muted: #8b8da3;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-primary-light: #eef2ff;
  --color-accent: #06b6d4;
  --color-border: #e2e4e9;
  --color-border-light: #f0f1f3;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 780px;
  --max-width-wide: 1200px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

/* ===== HEADER / NAV ===== */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.92);
}

.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.03em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.site-logo .logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* ===== HERO (Homepage) ===== */
.hero {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4338ca 100%);
  color: #fff;
  padding: 5rem 2rem 4.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.hero .tagline {
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  color: rgba(255,255,255,0.8);
  max-width: 640px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero .hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

/* ===== ARTICLE GRID (Homepage) ===== */
.articles-section {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 3.5rem 2rem 4rem;
}

.articles-section .section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.articles-section .section-subtitle {
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: box-shadow 0.25s, border-color 0.25s, transform 0.25s;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.article-card .card-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
  margin-bottom: 0.85rem;
  width: fit-content;
}

.article-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.65rem;
  letter-spacing: -0.01em;
}

.article-card h3 a {
  color: var(--color-text);
}

.article-card h3 a:hover {
  color: var(--color-primary);
}

.article-card .card-description {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.article-card .card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding-top: 0.85rem;
  border-top: 1px solid var(--color-border-light);
}

.article-card .read-link {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--color-primary);
}

.article-card .read-link:hover {
  text-decoration: underline;
}

/* ===== ARTICLE PAGE ===== */
.article-header {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 3rem 2rem 2.5rem;
}

.article-header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.article-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

.article-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.affiliate-disclosure {
  max-width: var(--max-width);
  margin: 1.5rem auto 0;
  padding: 0.85rem 1.25rem;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: #92400e;
  line-height: 1.5;
}

.affiliate-disclosure strong {
  font-weight: 600;
}

/* Table of Contents */
.toc-wrapper {
  max-width: var(--max-width);
  margin: 2rem auto;
  padding: 0 2rem;
}

.toc {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.75rem;
}

.toc-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 0.85rem;
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc li {
  margin-bottom: 0.35rem;
}

.toc a {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.5;
  display: block;
  padding: 0.2rem 0;
}

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

.toc ul ul {
  padding-left: 1.25rem;
}

.toc ul ul a {
  font-size: 0.87rem;
  color: var(--color-text-muted);
}

/* Article Content */
.article-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
}

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border-light);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 650;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.article-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.6rem;
}

.article-content p {
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.75;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.article-content li strong {
  color: var(--color-text);
}

.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-content code {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.88em;
}

.article-content pre {
  background: #1e1b4b;
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  line-height: 1.6;
}

.article-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.article-content hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2.5rem 0;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-content thead th {
  background: var(--color-bg-alt);
  font-weight: 600;
  text-align: left;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid var(--color-border);
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.article-content tbody td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
}

.article-content tbody tr:last-child td {
  border-bottom: none;
}

.article-content tbody tr:hover {
  background: var(--color-bg-alt);
}

.article-content strong {
  font-weight: 600;
}

/* Quick answer box */
.article-content > p:first-child strong:first-child,
.quick-answer {
  display: block;
  background: linear-gradient(135deg, var(--color-primary-light), #f0fdf4);
  border: 1px solid #c7d2fe;
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  font-size: 1rem;
  line-height: 1.65;
}

/* ===== FOOTER ===== */
.site-footer {
  margin-top: auto;
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 2rem;
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.footer-inner p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.footer-inner .footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.footer-inner .footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
}

.footer-inner .footer-links a:hover {
  color: var(--color-primary);
}

/* ===== 404 PAGE ===== */
.page-404 {
  text-align: center;
  padding: 6rem 2rem;
  flex: 1;
}

.page-404 h1 {
  font-size: 6rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.page-404 h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.page-404 p {
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.page-404 a.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s;
}

.page-404 a.btn:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 1rem;
    height: 56px;
  }

  .site-nav {
    gap: 1rem;
  }

  .site-nav a {
    font-size: 0.82rem;
  }

  .hero {
    padding: 3.5rem 1.25rem 3rem;
  }

  .articles-section {
    padding: 2.5rem 1.25rem;
  }

  .article-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .article-header {
    padding: 2rem 1.25rem 1.5rem;
  }

  .article-content {
    padding: 1.5rem 1.25rem 3rem;
  }

  .toc-wrapper {
    padding: 0 1.25rem;
  }

  .affiliate-disclosure {
    margin-left: 1.25rem;
    margin-right: 1.25rem;
  }

  .article-content table {
    font-size: 0.85rem;
    display: block;
    overflow-x: auto;
  }

  .article-content h2 {
    font-size: 1.35rem;
  }

  .article-content h3 {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  .article-card {
    padding: 1.25rem;
  }

  .article-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* Print styles */
@media print {
  .site-header, .site-footer, .toc-wrapper, .affiliate-disclosure {
    display: none;
  }

  .article-content {
    max-width: none;
    padding: 0;
  }
}