/* 
==============================================
MINIMALIST & PROFESSIONAL CSS STYLE
==============================================
Author: GitHub Copilot for mukisa Samuel
Version: 1.0
Date: October 7, 2025
==============================================
TABLE OF CONTENTS:
1. Variables & Root
2. Reset & Base Styles
3. Typography
4. Layout & Containers
5. Navigation
6. Hero Section
7. Articles & Cards
8. Blog Styles
9. Form Elements
10. Buttons
11. Footer
12. Utility Classes
13. Dark Mode
14. Media Queries
==============================================
*/

/* ========== 1. Variables & Root ========== */
:root {
  /* Color System */
  --primary-color: #3a86ff;
  --primary-dark: #2667cc;
  --secondary-color: #4361ee;
  --text-primary: #2b2d42;
  --text-secondary: #636783;
  --text-light: #ffffff;
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-accent: #f0f4ff;
  --border-color: #e9ecef;
  --error-color: #e63946;
  --success-color: #2a9d8f;
  --gradient: linear-gradient(135deg, #4361ee, #3a86ff);
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-secondary: 'Georgia', serif;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Box Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.08);
  /* Generic shadow (used by JS notifications) */
  --shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --primary-color: #4dabff;
  --primary-dark: #3a86ff;
  --text-primary: #f8f9fa;
  --text-secondary: #ced4da;
  --bg-primary: #18191a;
  --bg-secondary: #242526;
  --bg-accent: #212333;
  --border-color: #444444;
}

/* ========== 2. Reset & Base Styles ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: hidden; /* Prevent horizontal page scroll */
}

body {
  font-family: var(--font-primary);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden; /* Guard against any accidental overflow */
}

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

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

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

ul {
  list-style: none;
}

/* ========== 3. Typography ========== */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--space-sm);
  line-height: 1.2;
  font-weight: 700;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

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

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

/* ========== 4. Layout & Containers ========== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section-padding {
  padding: var(--space-xl) 0;
}

/* ========== 5. Navigation ========== */
.header {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-sm);
  z-index: 100;
  transition: background-color var(--transition-normal);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) 0;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav-link {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.theme-toggle,
.mobile-menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

.theme-toggle:hover,
.mobile-menu-toggle:hover {
  color: var(--primary-color);
}

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

/* ========== 6. Hero Section ========== */
.hero {
  background-color: var(--bg-accent);
  background-image: var(--gradient);
  color: var(--text-light);
  padding: var(--space-xl) 0;
  position: relative;
}

.hero-content {
  max-width: 800px;
  padding: var(--space-xl) 0;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.hero-content p {
  font-size: 1.25rem;
  margin-bottom: var(--space-lg);
  opacity: 0.9;
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ========== 7. Articles & Cards ========== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.section-title {
  margin-bottom: var(--space-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  height: 3px;
  width: 60px;
  background-color: var(--primary-color);
}

.article-card {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 1px solid var(--border-color);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.article-image {
  aspect-ratio: 16/9;
  background-color: var(--bg-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.article-content {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-date {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-xs);
}

.article-title {
  margin-bottom: var(--space-xs);
  line-height: 1.3;
}

.article-excerpt {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  flex-grow: 1;
}

.read-more {
  align-self: flex-start;
  font-weight: 500;
  transition: transform var(--transition-fast);
}

.read-more:hover {
  transform: translateX(5px);
}

/* ========== 8. Blog Styles ========== */
.blog-post {
  max-width: 800px;
  margin: 0 auto;
}

.blog-header {
  margin-bottom: var(--space-lg);
}

.blog-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.blog-meta {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

.blog-content {
  font-size: 1.125rem;
}

.blog-content h2 {
  margin-top: var(--space-lg);
}

.blog-content h3 {
  margin-top: var(--space-md);
}

.blog-content img {
  margin: var(--space-md) 0;
  border-radius: var(--radius-md);
}

.blog-content ul, .blog-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-md);
}

.blog-content ul li, .blog-content ol li {
  margin-bottom: var(--space-xs);
}

.blog-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Make wide tables scroll on small screens */
.blog-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* Ensure code blocks and embeds don't cause page overflow */
.blog-content pre {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  background-color: var(--bg-secondary);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
}
.blog-content iframe,
.blog-content video {
  max-width: 100%;
}

/* ========== 9. Form Elements ========== */
input, textarea, select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(74, 137, 255, 0.15);
}

.search-container {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.search-bar {
  padding-right: 50px;
}

.search-button {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 8px;
}

.search-button:hover {
  color: var(--primary-color);
}

.newsletter-input {
  display: flex;
  gap: var(--space-sm);
}

/* ========== 10. Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  min-height: 44px; /* Comfortable touch target on mobile */
  border-radius: var(--radius-md);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  border: none;
  background-color: var(--primary-color);
  color: var(--text-light);
  text-align: center;
}

.btn:hover {
  background-color: var(--primary-dark);
  color: var(--text-light);
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--text-light);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* ========== 11. Footer ========== */
.footer {
  background-color: var(--bg-secondary);
  padding: var(--space-lg) 0 0;
  margin-top: auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.footer-section h3 {
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: var(--space-xs);
}

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

.social-links {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.social-link {
  font-size: 1.25rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: var(--bg-accent);
  transition: background-color var(--transition-fast);
}

.social-link:hover {
  background-color: var(--primary-color);
  color: var(--text-light);
}

.footer-bottom {
  text-align: center;
  padding: var(--space-md) 0;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ========== 12. Utility Classes ========== */
.fade-in {
  animation: fadeIn 1s ease-in;
}

@keyframes fadeIn {
  0% {
    opacity: 0;
    transform: translateY(10px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Prevent layout breakage with long words/URLs on mobile */
body, p, h1, h2, h3, h4, h5, h6, .article-title, .blog-title {
  overflow-wrap: anywhere;
}

.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

/* ========== 13. Dark Mode ========== */
/* Dark mode styles are set in the variables section with [data-theme="dark"] */

/* ========== 14. Media Queries ========== */
@media screen and (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero-content h1 {
    font-size: 2.5rem;
  }
  
  .section-padding {
    padding: var(--space-lg) 0;
  }
  
  /* Slightly tighter container gutters on tablets/phones */
  .container {
    padding: 0 var(--space-sm);
  }
  
  /* More compact hero spacing on mobile */
  .hero {
    padding: var(--space-lg) 0;
  }
  .hero-content {
    padding: var(--space-lg) 0;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--bg-primary);
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-lg);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    will-change: transform;
    z-index: 99;
  }
  
  .nav-menu.active {
    transform: translateX(0);
    box-shadow: var(--shadow-md);
  }
  
  .nav-menu li {
    margin-bottom: var(--space-md);
  }
  
  .hero-cta {
    justify-content: center;
  }

  /* Ensure 2 columns on tablets, will collapse to 1 on smaller phones below */
  .articles-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media screen and (max-width: 480px) {
  html {
    font-size: 90%;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .blog-title {
    font-size: 2rem;
  }

  /* Single column grid on small phones to avoid horizontal scroll */
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  /* Slightly smaller hero paragraph text */
  .hero-content p {
    font-size: 1.05rem;
  }
}

/* Body scroll lock when mobile menu is open */
body.no-scroll {
  overflow: hidden;
}