/* Swiss Design Blog CSS - Light/Dark Theme Support */

:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #000000;
  --bg-accent: #f5f5f5;
  --text-primary: #000000;
  --text-secondary: #666666;
  --text-light: #999999;
  --accent-color: #dc2626;
  --accent-hover: #b91c1c;
  --border-color: #e5e5e5;
  
  /* Spacing & Layout */
  --container-max-width: 1200px;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
}

/* Dark Theme */
html[data-theme="dark"] {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-accent: #141414;
  --text-primary: #f5f5f5;
  --text-secondary: #a3a3a3;
  --text-light: #737373;
  --accent-color: #ef4444;
  --accent-hover: #dc2626;
  --border-color: #262626;
}

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

html {
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: color var(--transition-normal), background-color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.site-wrapper {
  min-height: 100vh;
  transition: background-color var(--transition-normal);
}

/* Container */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Header Styles */
.site-header {
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-normal);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.site-title {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.025em;
}

.site-title a {
  text-decoration: none;
  color: var(--text-primary);
}

.title-period {
  color: var(--accent-color);
  font-family: Helvetica, Arial, sans-serif;
  font-size: 1.5em;
  line-height: 0;
  position: relative;
  top: 0.05em;
}

.desktop-nav {
  display: flex;
  gap: var(--spacing-2xl);
}

.desktop-nav a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.desktop-nav a:hover {
  color: var(--accent-color);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  padding: var(--spacing-sm);
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-accent);
}

html[data-theme="light"] .sun-icon {
  display: none;
}

html[data-theme="dark"] .moon-icon {
  display: none;
}

html[data-theme="dark"] .theme-toggle {
  color: #fbbf24;
}

/* Mobile Menu Button */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  padding: var(--spacing-sm);
  border-radius: 4px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background-color: var(--bg-accent);
}

.mobile-menu-toggle .close-icon {
  display: none;
}

.mobile-menu-toggle.active .menu-icon {
  display: none;
}

.mobile-menu-toggle.active .close-icon {
  display: block;
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.mobile-menu.active {
  display: block;
}

.mobile-nav {
  padding: var(--spacing-md) 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-nav a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) 0;
  transition: color var(--transition-fast);
}

.mobile-nav a:hover {
  color: var(--accent-color);
}

/* Main Content */
.site-main {
  flex: 1;
}

/* Hero Section */
.hero-section {
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-normal);
}

.hero-content {
  max-width: 48rem;
  padding: var(--spacing-3xl) 0;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.025em;
}

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

.hero-description {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-2xl);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--bg-secondary);
  color: var(--bg-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  transition: background-color var(--transition-fast);
}

html[data-theme="dark"] .hero-cta {
  background-color: #ffffff;
  color: #000000;
}

.hero-cta:hover {
  background-color: var(--text-secondary);
}

html[data-theme="dark"] .hero-cta:hover {
  background-color: #e5e5e5;
}

/* Featured Article Section */
.featured-section {
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-normal);
}

.featured-content {
  padding: var(--spacing-3xl) 0;
  max-width: 48rem;
}

.featured-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

.badge {
  background-color: var(--accent-color);
  color: white;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-weight: var(--font-weight-medium);
  font-size: 0.75rem;
}

.featured-title {
  font-size: 1.875rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
}

.featured-excerpt {
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--text-light);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.featured-image {
  aspect-ratio: 16/9;
  background-color: var(--bg-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: background-color var(--transition-normal);
}

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

.placeholder-icon {
  width: 4rem;
  height: 4rem;
  background-color: var(--border-color);
  border-radius: 4px;
  margin: 0 auto var(--spacing-md) auto;
  transition: background-color var(--transition-normal);
}

/* Recent Articles Section */
.recent-section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 1.875rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.025em;
}

.section-divider {
  height: 1px;
  background-color: var(--border-color);
  flex: 1;
  margin-left: var(--spacing-2xl);
  transition: background-color var(--transition-normal);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.article-card {
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-2px);
}

.article-image {
  aspect-ratio: 16/9;
  background-color: var(--bg-accent);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: background-color var(--transition-normal);
}

.article-card:hover .article-image {
  background-color: var(--border-color);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

.category-tag {
  background-color: var(--bg-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-normal);
}

.article-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  transition: color var(--transition-fast);
}

.article-card:hover .article-title {
  color: var(--accent-color);
}

.article-excerpt {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-light);
  padding-top: var(--spacing-sm);
}

.view-all-cta {
  text-align: center;
}

/* Article List Layout (no images) */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: var(--spacing-2xl);
}

.article-row {
  border-bottom: 1px solid var(--border-color);
  transition: border-color var(--transition-normal);
}

.article-row:first-child {
  border-top: 1px solid var(--border-color);
}

.article-row-link {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: var(--spacing-xl);
  align-items: center;
  padding: var(--spacing-xl) 0;
  text-decoration: none;
  color: inherit;
  transition: background-color var(--transition-fast);
}

.article-row-link:hover {
  background-color: var(--bg-accent);
  margin: 0 calc(-1 * var(--spacing-lg));
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

.article-row-date {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  font-size: 0.75rem;
  color: var(--text-light);
  font-weight: var(--font-weight-medium);
  line-height: 1.3;
}

.date-month {
  font-weight: var(--font-weight-semibold);
  color: var(--accent-color);
}

.date-day {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  line-height: 1;
}

.date-year {
  color: var(--text-light);
}

.article-row-content {
  min-width: 0;
}

.article-row-title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
  margin-bottom: var(--spacing-xs);
  transition: color var(--transition-fast);
}

.article-row-link:hover .article-row-title {
  color: var(--accent-color);
}

.article-row-excerpt {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-row-arrow {
  color: var(--text-light);
  opacity: 0;
  transform: translateX(-8px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.article-row-link:hover .article-row-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* Featured Link Style */
.featured-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.featured-link:hover .featured-title {
  color: var(--accent-color);
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--text-primary);
  background: none;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.cta-button:hover {
  background-color: var(--text-primary);
  color: var(--bg-primary);
}

/* Newsletter Section */
.newsletter-section {
  background-color: var(--bg-secondary);
  color: var(--bg-primary);
  padding: var(--spacing-3xl) 0;
  transition: background-color var(--transition-normal);
}

html[data-theme="dark"] .newsletter-section {
  background-color: var(--bg-accent);
  color: var(--text-primary);
}

.newsletter-content {
  max-width: 32rem;
  margin: 0 auto;
  text-align: center;
}

.newsletter-title {
  font-size: 1.875rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
}

.newsletter-description {
  line-height: 1.7;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.9;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  max-width: 24rem;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  padding: var(--spacing-md);
  font-size: 0.875rem;
  border: none;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

html[data-theme="dark"] .newsletter-input {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.newsletter-input::placeholder {
  color: var(--text-light);
}

.newsletter-input:focus {
  outline: 2px solid var(--accent-color);
  outline-offset: -2px;
}

.newsletter-button {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--accent-color);
  color: white;
  border: none;
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.newsletter-button:hover {
  background-color: var(--accent-hover);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  transition: border-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.025em;
}

.footer-description {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.footer-heading {
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-md);
  font-size: 0.875rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer-nav a:hover {
  color: var(--accent-color);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-2xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: var(--text-light);
  transition: border-color var(--transition-normal);
}

/* Post Layout Styles */
.post-header {
  padding: var(--spacing-3xl) 0 var(--spacing-2xl) 0;
  border-bottom: 1px solid var(--border-color);
}

.post-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.025em;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--text-light);
}

.post-content {
  max-width: 65ch;
  margin: 0 auto;
  padding: var(--spacing-2xl) 0;
  font-size: 1.125rem;
  line-height: 1.8;
}

.post-content h2 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
  margin: var(--spacing-2xl) 0 var(--spacing-md) 0;
  line-height: 1.3;
}

.post-content h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin: var(--spacing-xl) 0 var(--spacing-md) 0;
  line-height: 1.3;
}

.post-content p {
  margin-bottom: var(--spacing-lg);
}

.post-content ul,
.post-content ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-lg);
}

.post-content li {
  margin-bottom: var(--spacing-sm);
}

.post-content blockquote {
  border-left: 4px solid var(--accent-color);
  padding-left: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
  font-style: italic;
  color: var(--text-secondary);
}

.post-content code {
  background-color: var(--bg-accent);
  padding: 0.2em 0.4em;
  border-radius: 3px;
  font-size: 0.9em;
  color: var(--accent-color);
}

.post-content pre {
  background-color: var(--bg-accent);
  padding: var(--spacing-lg);
  border-radius: 8px;
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

.post-content pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

/* About Page Styles */
.about-section {
  padding: var(--spacing-3xl) 0;
}

.about-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--border-color);
}

.about-avatar {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--border-color);
  transition: border-color var(--transition-normal);
}

.about-intro {
  flex: 1;
}

.about-name {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.025em;
}

.about-title {
  font-size: 1.25rem;
  color: var(--accent-color);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-xs);
}

.about-company {
  font-size: 1rem;
  color: var(--text-secondary);
}

.about-content {
  max-width: 65ch;
  margin-bottom: var(--spacing-3xl);
}

.about-content p {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  color: var(--text-secondary);
}

.about-connect h2 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-xl);
  letter-spacing: -0.025em;
}

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.social-link:hover {
  border-color: var(--accent-color);
  background-color: var(--accent-color);
  color: white;
}

.social-link svg {
  width: 20px;
  height: 20px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .desktop-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .hero-content {
    padding: var(--spacing-2xl) 0;
  }

  .featured-content {
    padding: var(--spacing-2xl) 0;
  }

  .recent-section {
    padding: var(--spacing-2xl) 0;
  }

  .newsletter-section {
    padding: var(--spacing-2xl) 0;
  }

  .newsletter-form {
    flex-direction: row;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
  }

  .section-divider {
    width: 100%;
    margin: 0;
  }

  .article-row-link {
    grid-template-columns: 70px 1fr;
    gap: var(--spacing-md);
  }

  .article-row-arrow {
    display: none;
  }

  .date-day {
    font-size: 1.25rem;
  }

  /* About page responsive */
  .about-header {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-xl);
  }

  .about-avatar {
    width: 150px;
    height: 150px;
  }

  .about-name {
    font-size: 2rem;
  }

  .social-links {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  .newsletter-form {
    flex-direction: column;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .post-header {
    padding: var(--spacing-2xl) 0 var(--spacing-lg) 0;
  }
  
  .post-content {
    padding: var(--spacing-xl) 0;
  }
}