/* 
* Infiknowledge - Modern AI-First SEO Agency
* Main Stylesheet
*/

/* Custom font imports */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=Roboto:wght@400;500;700&display=swap');

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

:root {
  /* Core Brand Colors */
  --primary: #4361ee;
  --primary-dark: #3a56d4;
  --primary-light: #7b92ff;
  --secondary: #06d6a0;
  --accent: #f72585;
  
  /* Neutral Colors */
  --dark: #0f172a;
  --dark-blue: #1e293b;
  --gray-900: #334155;
  --gray-800: #475569;
  --gray-700: #64748b;
  --gray-600: #94a3b8;
  --gray-500: #cbd5e1;
  --gray-400: #e2e8f0;
  --gray-300: #f1f5f9;
  --gray-200: #f8fafc;
  --white: #ffffff;
  
  /* Semantic Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
  --gradient-dark: linear-gradient(135deg, var(--dark-blue) 0%, var(--dark) 100%);
  --gradient-accent: linear-gradient(135deg, var(--accent) 0%, #9333ea 100%);
  
  /* Typography */
  --font-primary: 'Poppins', sans-serif;
  --font-secondary: 'Roboto', sans-serif;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 6px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 10px 15px rgba(15, 23, 42, 0.1);
  --shadow-xl: 0 15px 25px rgba(15, 23, 42, 0.1);
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Animation */
  --transition-fast: 200ms;
  --transition-normal: 300ms;
  --transition-slow: 500ms;
}

/* Base styles */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  color: var(--gray-900);
  line-height: 1.6;
  background-color: var(--gray-200);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--dark);
}

h1 {
  font-size: 2.75rem;
  font-weight: 700;
}

h2 {
  font-size: 2.25rem;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: var(--radius-full);
}

h3 {
  font-size: 1.75rem;
}

h4 {
  font-size: 1.35rem;
}

h5 {
  font-size: 1.15rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: 1.5rem;
}

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

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

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

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Section spacing */
section {
  padding: 5rem 0;
}

section.bg-alt {
  background-color: var(--gray-300);
}

/* Skip to main content - Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  padding: 8px;
  z-index: 100;
  background: var(--primary);
  color: white;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 0;
}

/* Buttons */
.btn {
  display: inline-block;
  font-weight: 600;
  text-align: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal) ease;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: rgba(255, 255, 255, 0.1);
  z-index: -1;
  transition: all var(--transition-normal) ease;
}

.btn:hover::after {
  height: 100%;
}

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

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: var(--white);
  text-decoration: none;
}

.btn-secondary {
  background: var(--secondary);
  color: var(--dark);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  color: var(--dark);
  text-decoration: none;
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  text-decoration: none;
}

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

.btn-accent:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  color: var(--white);
  text-decoration: none;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

/* Cards */
.card {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-normal) ease, box-shadow var(--transition-normal) ease;
}

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

.card-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--gray-400);
}

.card-body {
  padding: 1.5rem;
}

.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--gray-400);
}

/* Badge */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.badge-secondary {
  background: rgba(6, 214, 160, 0.15);
  color: var(--secondary);
}

.badge-accent {
  background: rgba(247, 37, 133, 0.15);
  color: var(--accent);
}

/* Form elements */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--gray-900);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--gray-900);
  background-color: var(--white);
  background-clip: padding-box;
  border: 2px solid var(--gray-400);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast) ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

/* Utility classes */
.text-center {
  text-align: center;
}

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

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

.text-secondary {
  color: var(--secondary);
}

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

.text-success {
  color: var(--success);
}

.text-warning {
  color: var(--warning);
}

.text-error {
  color: var(--error);
}

.bg-primary {
  background: var(--primary);
  color: var(--white);
}

.bg-secondary {
  background: var(--secondary);
}

.bg-accent {
  background: var(--accent);
  color: var(--white);
}

.bg-dark {
  background: var(--dark);
  color: var(--white);
}

.bg-light {
  background: var(--gray-300);
}

.bg-white {
  background: var(--white);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 1.5rem;
}

.mb-4 {
  margin-bottom: 2rem;
}

.mb-5 {
  margin-bottom: 2.5rem;
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-3 {
  margin-top: 1.5rem;
}

.mt-4 {
  margin-top: 2rem;
}

.mt-5 {
  margin-top: 2.5rem;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.d-flex {
  display: flex;
}

.flex-column {
  flex-direction: column;
}

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

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

.space-between {
  justify-content: space-between;
}

.w-100 {
  width: 100%;
}

.fw-normal {
  font-weight: 400;
}

.fw-medium {
  font-weight: 500;
}

.fw-semibold {
  font-weight: 600;
}

.fw-bold {
  font-weight: 700;
}

.rounded {
  border-radius: var(--radius-md);
}

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

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

/* Responsive */
@media (max-width: 1200px) {
  html {
    font-size: 15px;
  }
  .container {
    max-width: 992px;
  }
}

@media (max-width: 992px) {
  html {
    font-size: 14px;
  }
  .container {
    max-width: 768px;
  }
  h1 {
    font-size: 2.5rem;
  }
  h2 {
    font-size: 2rem;
  }
  h3 {
    font-size: 1.5rem;
  }
  section {
    padding: 4rem 0;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 13px;
  }
  .container {
    max-width: 576px;
  }
  h1 {
    font-size: 2.25rem;
  }
  section {
    padding: 3rem 0;
  }
}

@media (max-width: 576px) {
  html {
    font-size: 12px;
  }
  .container {
    width: 100%;
    padding: 0 1rem;
  }
  h1 {
    font-size: 2rem;
  }
  section {
    padding: 2.5rem 0;
  }
}