/* FocusNest Canada - Modern Photography Blog CSS */

/* CSS Custom Properties - Design Tokens */
:root {
  /* Color Palette */
  --graphite: #1A2230;
  --signal-blue: #3AA7FF;
  --purple: #7C5CFF;
  --teal: #20C6B7;
  --soft-gray: #A7B0BD;
  --white: #FFFFFF;
  --black: #000000;
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, var(--signal-blue) 0%, var(--purple) 100%);
  --secondary-gradient: linear-gradient(135deg, var(--purple) 0%, var(--teal) 100%);
  --accent-gradient: linear-gradient(135deg, var(--teal) 0%, var(--signal-blue) 100%);
  
  /* Typography Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3.1rem;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  /* Layout */
  --max-width: 1200px;
  --grid-gap: 1.5rem;
  --border-radius: 16px;
  --border-radius-sm: 8px;
  
  /* Shadows */
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 12px 28px rgba(0, 0, 0, 0.24);
  --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.35);
  
  /* Motion */
  --transition-fast: 160ms ease;
  --transition-normal: 220ms ease;
  --transition-slow: 320ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background-color: var(--graphite);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Focus Grid Background */
.focus-grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background: var(--graphite);
  background-image: 
    radial-gradient(circle at 25% 25%, rgba(58, 167, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(124, 92, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 75% 25%, rgba(32, 198, 183, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 25% 75%, rgba(58, 167, 255, 0.05) 0%, transparent 50%);
}

.focus-grid-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(58, 167, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 167, 255, 0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  animation: gridFloat 20s ease-in-out infinite;
}

@keyframes gridFloat {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-20px, -20px) rotate(1deg); }
}

/* Floating focal points */
.focus-grid-bg::after {
  content: '';
  position: absolute;
  top: 20%;
  left: 20%;
  width: 4px;
  height: 4px;
  background: var(--signal-blue);
  border-radius: 50%;
  box-shadow: 
    0 0 20px var(--signal-blue),
    100px 200px 0 var(--purple),
    200px 100px 0 var(--teal),
    300px 300px 0 var(--signal-blue),
    -100px -100px 0 var(--purple);
  animation: focalPointsFloat 15s ease-in-out infinite;
}

@keyframes focalPointsFloat {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  50% { transform: translate(10px, -10px) scale(1.2); opacity: 1; }
}

/* Container & Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--grid-gap);
}

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

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

/* Grid System */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  margin-bottom: var(--space-sm);
  color: var(--soft-gray);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(26, 34, 48, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(58, 167, 255, 0.1);
  transition: var(--transition-normal);
}

.header.scrolled {
  background: rgba(26, 34, 48, 0.98);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  font-size: var(--text-2xl);
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: var(--transition-fast);
}

.logo:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--white);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--signal-blue);
  background: rgba(58, 167, 255, 0.1);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--signal-blue);
  border-radius: 1px;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--white);
  margin: 2px 0;
  transition: var(--transition-fast);
  border-radius: 2px;
}

.mobile-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--graphite);
  border-top: 1px solid rgba(58, 167, 255, 0.1);
  padding: var(--space-md);
}

.mobile-menu.active {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav-link {
  color: var(--white);
  text-decoration: none;
  padding: var(--space-sm);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

.mobile-nav-link:hover {
  background: rgba(58, 167, 255, 0.1);
  color: var(--signal-blue);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(var(--text-4xl), 8vw, var(--text-5xl));
  font-weight: 800;
  margin-bottom: var(--space-md);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--soft-gray);
  margin-bottom: var(--space-xl);
  line-height: 1.6;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-xl);
  background: var(--primary-gradient);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--text-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.cta-button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button:hover::before {
  left: 100%;
}

/* Stats Section */
.stats {
  background: rgba(58, 167, 255, 0.05);
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl);
}

.stat-item {
  text-align: center;
  padding: var(--space-md);
}

.stat-number {
  font-size: var(--text-4xl);
  font-weight: 800;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.stat-label {
  color: var(--soft-gray);
  font-weight: 500;
  margin-top: var(--space-xs);
}

/* Card Components */
.card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(58, 167, 255, 0.1);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transition: var(--transition-normal);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(58, 167, 255, 0.3);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.card-excerpt {
  color: var(--soft-gray);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  color: var(--soft-gray);
}

.badge {
  padding: var(--space-xs) var(--space-sm);
  background: var(--primary-gradient);
  color: var(--white);
  border-radius: var(--border-radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
}

.read-time {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* Article Grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

/* Advantages Section */
.advantages {
  background: rgba(124, 92, 255, 0.05);
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl);
}

.advantage-item {
  text-align: center;
  padding: var(--space-lg);
}

.advantage-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto var(--space-md);
  background: var(--secondary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
}

.advantage-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.advantage-description {
  color: var(--soft-gray);
  line-height: 1.6;
}

/* Testimonials */
.testimonials {
  background: rgba(32, 198, 183, 0.05);
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
  padding: var(--space-xl);
}

.testimonial-item {
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  border: 1px solid rgba(32, 198, 183, 0.2);
}

.testimonial-content {
  font-style: italic;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.author-avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--white);
}

.author-info h4 {
  margin: 0;
  font-size: var(--text-base);
}

.author-info p {
  margin: 0;
  color: var(--soft-gray);
  font-size: var(--text-sm);
}

.stars {
  color: #FFD700;
  margin-top: var(--space-xs);
}

/* Newsletter */
.newsletter {
  background: var(--primary-gradient);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  text-align: center;
  margin: var(--space-xl) 0;
}

.newsletter h3 {
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.newsletter p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-lg);
}

.newsletter-form {
  display: flex;
  max-width: 400px;
  margin: 0 auto;
  gap: var(--space-sm);
}

.newsletter-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: var(--text-base);
  background: rgba(255, 255, 255, 0.9);
}

.newsletter-button {
  padding: var(--space-sm) var(--space-lg);
  background: var(--graphite);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

/* Category Filter */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.filter-chip {
  padding: var(--space-xs) var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(58, 167, 255, 0.2);
  border-radius: var(--border-radius-sm);
  color: var(--white);
  text-decoration: none;
  transition: var(--transition-fast);
  cursor: pointer;
}

.filter-chip:hover,
.filter-chip.active {
  background: var(--primary-gradient);
  border-color: transparent;
}

/* Footer */
.footer {
  background: rgba(0, 0, 0, 0.3);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h4 {
  margin-bottom: var(--space-md);
  color: var(--signal-blue);
}

.footer-section p,
.footer-section a {
  color: var(--soft-gray);
  text-decoration: none;
  line-height: 1.8;
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(58, 167, 255, 0.1);
  color: var(--soft-gray);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 50px;
  height: 50px;
  background: var(--primary-gradient);
  border: none;
  border-radius: 50%;
  color: var(--white);
  font-size: var(--text-lg);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Scroll Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-lg);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .stats {
    margin: var(--space-md) 0;
  }
  
  .stats-grid {
    padding: var(--space-md);
  }
  
  .card {
    padding: var(--space-md);
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
}

/* Pulse Animation for Interactive Elements */
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(58, 167, 255, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(58, 167, 255, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(58, 167, 255, 0);
  }
}

.pulse:hover {
  animation: pulse 1.5s infinite;
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(58, 167, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--signal-blue);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}