/* Gunnels Blogg - Modern CSS */
/* LetterTune-inspired design with dark/light mode */

:root {
  /* Color palette - Light mode (default) */
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-border: #e5e5e5;
  --color-primary: #2e7d32;
  --color-primary-hover: #1b5e20;
  --color-accent: #4caf50;
  --color-accent-light: #e8f5e9;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-serif: Georgia, Cambria, 'Times New Roman', Times, serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  
  /* Layout */
  --max-width: 720px;
  --content-width: 680px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* Dark mode */
[data-theme="dark"] {
  --color-bg: #121212;
  --color-surface: #1e1e1e;
  --color-text: #e5e5e5;
  --color-text-muted: #a0a0a0;
  --color-border: #333333;
  --color-primary: #81c784;
  --color-primary-hover: #4caf50;
  --color-accent: #a5d6a7;
  --color-accent-light: #1e3a1e;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  transition: background-color var(--transition-slow), color var(--transition-slow);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
  margin-bottom: var(--space-4);
}

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

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

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Header */
.site-header {
  padding: var(--space-8) 0 var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background-color var(--transition-slow), border-color var(--transition-slow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.site-logo h1 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
}

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

.site-logo a:hover {
  text-decoration: none;
}

/* Navigation */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

/* Header Banner Image */
.header-banner {
  width: 100%;
  height: 130px;
  margin-top: 8px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.header-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.header-banner:hover img {
  transform: scale(1.02);
}

@media (max-width: 768px) {
  .header-banner {
    height: 130px;
  }
}

.site-nav a.active {
  color: var(--color-primary);
  font-weight: 500;
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Hero Section */
.hero {
  padding: var(--space-16) 0;
  text-align: center;
  position: relative;
}

.hero-image {
  width: 100%;
  max-width: 1200px;
  height: 250px;
  margin: 0 auto var(--space-8);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.hero-image:hover img {
  transform: scale(1.02);
}

@media (max-width: 768px) {
  .hero-image {
    height: 180px;
  }
}

.hero h2 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: var(--content-width);
  margin: 0 auto var(--space-6);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background-color: var(--color-primary);
  color: white;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.hero-cta:hover {
  background-color: var(--color-primary-hover);
  color: white;
  text-decoration: none;
  transform: translateY(-1px);
}

/* Main Content */
.main-content {
  padding: var(--space-12) 0;
  min-height: 60vh;
}

/* Page Header */
.page-header {
  margin-bottom: var(--space-8);
}

.page-header h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
}

.page-header p {
  color: var(--color-text-muted);
  margin: 0;
}

/* Post Card */
.post-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.post-card {
  padding: var(--space-6);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base), background-color var(--transition-slow);
}

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

.post-card-header {
  margin-bottom: var(--space-3);
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.post-card-meta .author {
  font-weight: 500;
  color: var(--color-primary);
}

.post-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

.post-card h3 a {
  color: var(--color-text);
  text-decoration: none;
}

.post-card h3 a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.post-card .excerpt {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.6;
  white-space: pre-wrap;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary);
}

.read-more:hover {
  text-decoration: none;
}

.read-more svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.read-more:hover svg {
  transform: translateX(2px);
}

/* Single Post */
.post-single {
  max-width: var(--content-width);
  margin: 0 auto;
}

.post-single-header {
  margin-bottom: var(--space-8);
}

.post-single-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.post-single-meta .author {
  font-weight: 500;
  color: var(--color-primary);
}

.post-single h1 {
  font-size: var(--font-size-4xl);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

.post-single-content {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  white-space: pre-wrap;
}

.post-single-content:empty::before,
.post-card .excerpt:empty::before {
  content: none;
}

.post-single-content p {
  margin-bottom: var(--space-6);
}

.post-single-content h2 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.post-single-content h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.post-single-content ul, .post-single-content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.post-single-content li {
  margin-bottom: var(--space-2);
}

.post-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.post-back:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.pagination a:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  text-decoration: none;
}

.pagination .current {
  color: white;
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.pagination .disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Footer */
.site-footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  transition: border-color var(--transition-slow);
}

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

/* Empty State */
.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  color: var(--color-text-muted);
}

.empty-state h3 {
  margin-bottom: var(--space-2);
}

/* Error Page */
.error-page {
  text-align: center;
  padding: var(--space-16) 0;
}

.error-page h1 {
  font-size: var(--font-size-4xl);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.error-page p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

/* Mobile First - Responsive */
@media (max-width: 640px) {
  :root {
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.375rem;
    --font-size-xl: 1.125rem;
    --font-size-lg: 1rem;
  }
  
  .hero {
    padding: var(--space-10) 0;
  }
  
  .hero h2 {
    font-size: var(--font-size-3xl);
  }
  
  .header-inner {
    flex-wrap: wrap;
  }
  
  .site-nav {
    order: 3;
    width: 100%;
    justify-content: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-4);
  }
  
  .post-card {
    padding: var(--space-4);
  }
  
  .post-single h1 {
    font-size: var(--font-size-3xl);
  }
  
  .post-single-content {
    font-size: var(--font-size-base);
  }
  
  .post-single-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }
  
  .pagination {
    flex-wrap: wrap;
  }
}

/* Utility Classes */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }

.language-switch {
  display: flex;
  gap: 8px;
  margin-left: 20px;
}

.language-switch a {
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: bold;
  text-decoration: none;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.language-switch a:hover,
.language-switch a.active {
  color: var(--primary);
  background-color: var(--surface-2);
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: nowrap;
    justify-content: space-between;
  }
  
  .site-nav {
    order: 0;
    width: auto;
    padding-top: 0;
    border-top: none;
    margin-top: 0;
    gap: var(--space-2);
  }
  
  .language-switch {
    margin-left: 0;
    margin-top: 0;
  }
}