/* ========================================
   BigEar Media - Modern CSS Framework
   ======================================== */

/* CSS Custom Properties */
:root {
  /* Color Palette */
  --primary-color: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  
  --bg-white: #ffffff;
  --bg-gray-50: #f9fafb;
  --bg-gray-100: #f3f4f6;
  --bg-gray-900: #111827;
  
  --border-color: #e5e7eb;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Poppins', var(--font-sans);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text-primary);
  line-height: 1.6;
  background-color: var(--bg-white);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 1.125rem;
}

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

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header & Navigation */
header {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-base);
}

header.scrolled {
  box-shadow: var(--shadow-md);
}

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

.logo {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary-color);
  font-family: var(--font-heading);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-links a:hover {
  background-color: var(--bg-gray-50);
  color: var(--primary-color);
}

.nav-links a.active {
  color: var(--primary-color);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-primary);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-secondary {
  background-color: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-secondary:hover {
  background-color: var(--primary-color);
  color: white;
}

.btn-accent {
  background-color: var(--secondary-color);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-accent:hover {
  background-color: #059669;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  color: white;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero p {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xl);
  color: rgba(255,255,255,0.95);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-xl) 0;
}

.stat-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.2);
}

.stat-card .number {
  font-size: 3rem;
  font-weight: 800;
  display: block;
  margin-bottom: var(--spacing-xs);
}

.stat-card .label {
  font-size: 1.125rem;
  opacity: 0.9;
  color: white;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Sections */
section {
  padding: var(--spacing-2xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
  font-size: 2.75rem;
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

.section-alt {
  background-color: var(--bg-gray-50);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

/* Cards */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--border-color);
}

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

.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: white;
  margin-bottom: var(--spacing-md);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Feature Cards */
.feature-card {
  text-align: center;
}

.feature-card .card-icon {
  margin: 0 auto var(--spacing-md);
}

/* Forms */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 0.875rem var(--spacing-sm);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  background-color: var(--bg-white);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

select.form-control {
  cursor: pointer;
}

/* Footer */
footer {
  background-color: var(--bg-gray-900);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

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

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 1.25rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section a {
  color: rgba(255,255,255,0.8);
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
}

/* Partners Section */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  align-items: center;
  justify-items: center;
}

.partner-logo {
  padding: var(--spacing-md);
  background: var(--bg-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
  width: 100%;
}

.partner-logo:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.partner-logo img {
  max-width: 100%;
  max-height: 60px;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all var(--transition-base);
}

.partner-logo:hover img {
  filter: grayscale(0%);
  opacity: 1;
}

/* Testimonials */
.testimonial {
  background: var(--bg-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--primary-color);
}

.testimonial-text {
  font-size: 1.125rem;
  font-style: italic;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

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

.testimonial-author-info strong {
  display: block;
  color: var(--text-primary);
  font-weight: 600;
}

.testimonial-author-info span {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  text-align: center;
  padding: var(--spacing-2xl) 0;
  border-radius: var(--radius-xl);
  margin: var(--spacing-2xl) 0;
}

.cta-section h2 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  color: rgba(255,255,255,0.95);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.25rem;
  }
  
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  section {
    padding: var(--spacing-xl) 0;
  }
}