/* Root Variables & Design System */
:root {
  --bg-color: #faf9f6;
  --panel-bg: #ffffff;
  --text-color: #1a1f26;
  --text-muted: #5c6470;
  
  --accent-color: #c9522d;
  --accent-hover: #b04421;
  --accent-light: #fbeee8;
  
  --border-color: #e8e5df;
  --card-shadow: 0 4px 24px rgba(26, 31, 38, 0.03), 0 1px 2px rgba(26, 31, 38, 0.02);
  --card-shadow-hover: 0 12px 36px rgba(26, 31, 38, 0.08), 0 2px 4px rgba(26, 31, 38, 0.03);
  
  --btn-secondary-bg: #f2efe9;
  --btn-secondary-hover: #e8e4db;
  
  --font-sans: "Arial Narrow", "Avenir Next Condensed", "Segoe UI", Roboto, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;
  
  --max-width: 1040px;
  --max-width-article: 720px;
  
  --transition-speed: 0.25s;
  --transition-easing: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #0b0e14;
    --panel-bg: #121720;
    --text-color: #e6e9ef;
    --text-muted: #94a1b2;
    
    --accent-color: #e56b43;
    --accent-hover: #f0825e;
    --accent-light: #251e1b;
    
    --border-color: #212c3d;
    --card-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    --card-shadow-hover: 0 12px 36px rgba(0, 0, 0, 0.4);
    
    --btn-secondary-bg: #1a222e;
    --btn-secondary-hover: #232e3f;
  }
}

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

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

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-sans);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  transition: background-color var(--transition-speed) var(--transition-easing), 
              color var(--transition-speed) var(--transition-easing);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-easing);
}

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

/* Typography wrapping optimizations */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-color);
  text-wrap: balance;
}

p, blockquote, li {
  text-wrap: pretty;
}

/* Typography styles */
h1 { font-size: 2.5rem; }
h2 { font-size: 1.85rem; }
h3 { font-size: 1.4rem; }

/* Micro-animations: Page Fade-in */
.fade-in {
  animation: fadeIn 0.6s var(--transition-easing);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Layout container */
#main-content {
  flex-grow: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

/* Header Styles */
.site-header {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--panel-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-speed) var(--transition-easing),
              border-color var(--transition-speed) var(--transition-easing);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}

.logo {
  font-family: var(--font-sans);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-color);
}

.logo-accent {
  color: var(--accent-color);
}

.nav-menu {
  display: flex;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.25rem 0;
}

.nav-link:hover {
  color: var(--text-color);
}

.nav-link.active {
  color: var(--accent-color);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
  border-radius: 2px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-speed) var(--transition-easing);
  border: none;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: var(--text-color);
}

.btn-secondary:hover {
  background-color: var(--btn-secondary-hover);
  transform: translateY(-1px);
}

/* Homepage Styles */
.home-container {
  display: flex;
  flex-direction: column;
  gap: 5rem;
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Framework Section */
.framework-section, .featured-guides-section {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto;
}

.section-eyebrow {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-color);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.section-description {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.framework-card {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.25rem;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-speed) var(--transition-easing),
              box-shadow var(--transition-speed) var(--transition-easing),
              border-color var(--transition-speed) var(--transition-easing);
}

.framework-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--accent-color);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background-color: var(--accent-light);
  color: var(--accent-color);
  border-radius: 8px;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.card-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Guides Grid & Cards */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.guide-card {
  position: relative;
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  transition: transform var(--transition-speed) var(--transition-easing),
              box-shadow var(--transition-speed) var(--transition-easing),
              border-color var(--transition-speed) var(--transition-easing);
}

.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--accent-color);
}

.guide-card-content {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.category-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.guide-card-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

/* Semantic & Accessible full-card click wrapper */
.guide-card-link::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
}

.guide-card-summary {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.guide-card-meta {
  display: flex;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: auto;
}

.meta-separator {
  margin: 0 0.5rem;
  color: var(--border-color);
}

/* List Page (guides collection) */
.list-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.list-header {
  margin-bottom: 3.5rem;
  text-align: center;
}

.list-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  margin-bottom: 1rem;
}

.list-description {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Article / Detail Page Styles */
.article-container {
  max-width: var(--max-width-article);
  margin: 0 auto;
}

.article-header {
  margin-bottom: 3rem;
  text-align: center;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 3.25rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-top: 0.5rem;
  margin-bottom: 1.25rem;
}

.article-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.article-content {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--text-color);
}

.article-content p {
  margin-bottom: 1.75rem;
}

.article-content h2 {
  font-family: var(--font-sans);
  font-size: 1.75rem;
  margin: 2.5rem 0 1rem;
}

.article-content h3 {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  margin: 2rem 0 0.75rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.75rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-muted);
}

.article-content a {
  color: var(--accent-color);
  border-bottom: 1px solid var(--border-color);
}

.article-content a:hover {
  border-bottom-color: var(--accent-color);
}

/* Contact Form Styles */
.contact-container {
  max-width: var(--max-width-article);
  margin: 0 auto;
}

.contact-form {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 3rem;
  box-shadow: var(--card-shadow);
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-color);
}

.form-group input, .form-group textarea {
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: border-color var(--transition-speed) var(--transition-easing),
              box-shadow var(--transition-speed) var(--transition-easing);
  outline: none;
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 150px;
}

/* Footer Styles */
.site-footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--panel-bg);
  padding: 4rem 1.5rem;
  margin-top: 6rem;
  transition: background-color var(--transition-speed) var(--transition-easing),
              border-color var(--transition-speed) var(--transition-easing);
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 3rem;
  flex-wrap: wrap;
}

.footer-info {
  max-width: 400px;
}

.footer-info h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.footer-info p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
  align-self: flex-end;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  .hero-title { font-size: 2.75rem; }
  .hero-subtitle { font-size: 1.15rem; }
  
  #main-content {
    padding: 2rem 1.25rem;
  }
  
  .header-container {
    flex-direction: column;
    gap: 1.25rem;
    padding: 1.25rem 1.25rem;
  }
  
  .nav-menu {
    width: 100%;
    justify-content: center;
    gap: 1.25rem;
  }
  
  .home-container {
    gap: 3.5rem;
  }
  
  .contact-form {
    padding: 2rem 1.5rem;
  }
  
  .footer-container {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
  }
  
  .footer-copyright {
    align-self: center;
  }
}