/* ==========================================================================
   Canien Tech - Main Stylesheet
   ========================================================================== */

/* CSS Variables
   ========================================================================== */
:root {
  /* Colors - Deep Blue & Black Professional Theme */
  --primary-color: #0047ab;
  --primary-dark: #002d6b;
  --primary-light: #1e5fcc;
  --secondary-color: #00a8ff;
  --accent-color: #00d4ff;

  /* Neutral Colors - Dark Theme */
  --text-primary: #e8e8e8;
  --text-secondary: #b8b8b8;
  --text-light: #888888;
  --background-white: #0a0a0a;
  --background-light: #141414;
  --background-dark: #000000;
  --background-card: #1a1a1a;
  --border-color: #2a2a2a;

  /* Typography - TCS-Style Professional Font Stack */
  --font-primary: 'Houschka Rounded', 'Nunito', 'Varela Round', 'Helvetica Neue', Helvetica, Arial, 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Houschka Rounded', 'Nunito', 'Varela Round', 'Helvetica Neue', Helvetica, Arial, 'Segoe UI', sans-serif;

  /* Font Sizes */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */
  --font-size-4xl: 2.5rem;    /* 40px */
  --font-size-5xl: 3rem;      /* 48px */

  /* Spacing */
  --spacing-xs: 0.5rem;    /* 8px */
  --spacing-sm: 1rem;      /* 16px */
  --spacing-md: 1.5rem;    /* 24px */
  --spacing-lg: 2rem;      /* 32px */
  --spacing-xl: 3rem;      /* 48px */
  --spacing-2xl: 4rem;     /* 64px */
  --spacing-3xl: 6rem;     /* 96px */

  /* Layout */
  --max-width: 1440px;
  --container-padding: 2rem;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

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

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

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

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

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

p {
  margin-bottom: var(--spacing-sm);
}

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

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

img, video {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
}

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Global Utilities
   ========================================================================== */

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

.container-wide {
  max-width: 100%;
  padding: 0 var(--container-padding);
}

.container-narrow {
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Section Spacing */
.section {
  padding: var(--spacing-3xl) 0;
}

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

.section-lg {
  padding: 6rem 0;
}

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

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

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

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

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

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.text-bold { font-weight: 700; }
.text-semibold { font-weight: 600; }
.text-normal { font-weight: 400; }

/* Button Styles */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border-radius: 0;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
}

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

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

.btn-secondary {
  background-color: transparent;
  color: white;
  border-color: white;
}

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

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

.btn-white:hover {
  background-color: rgba(0, 212, 255, 0.15);
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(0, 212, 255, 0.3);
}

.btn-large {
  padding: 1.125rem 2.5rem;
  font-size: var(--font-size-lg);
}

.btn-small {
  padding: 0.625rem 1.5rem;
  font-size: var(--font-size-sm);
}

/* Card Styles */
.card {
  background: var(--background-card);
  border-radius: 0;
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: 0 10px 25px rgba(0, 71, 171, 0.3);
  transform: translateY(-4px);
  border-color: var(--primary-color);
}

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-xs);
}

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

/* Background Colors */
.bg-white { background-color: var(--background-white); }
.bg-light { background-color: var(--background-light); }
.bg-dark { background-color: var(--background-dark); }
.bg-primary { background-color: var(--primary-color); }

/* Spacing Utilities */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.pt-sm { padding-top: var(--spacing-sm); }
.pt-md { padding-top: var(--spacing-md); }
.pt-lg { padding-top: var(--spacing-lg); }

.pb-sm { padding-bottom: var(--spacing-sm); }
.pb-md { padding-bottom: var(--spacing-md); }
.pb-lg { padding-bottom: var(--spacing-lg); }

/* Visibility Utilities */
.hidden { display: none; }
.visible { display: block; }

/* Responsive Utilities */
@media (max-width: 1024px) {
  :root {
    --container-padding: 1.5rem;
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
  }

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

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }

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

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

  .mobile-hidden {
    display: none;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 1rem;
  }

  .btn {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-sm);
  }
}

/* Animations
   ========================================================================== */

/* Scroll-triggered animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Basic animation keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes rotateIn {
  from {
    opacity: 0;
    transform: rotate(-10deg) scale(0.9);
  }
  to {
    opacity: 1;
    transform: rotate(0) scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

/* Animation utility classes */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.6s ease-out;
}

.slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

.slide-in-up {
  animation: slideInUp 0.6s ease-out;
}

.slide-in-down {
  animation: slideInDown 0.6s ease-out;
}

.scale-in {
  animation: scaleIn 0.6s ease-out;
}

.rotate-in {
  animation: rotateIn 0.6s ease-out;
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}

.bounce {
  animation: bounce 1s ease-in-out infinite;
}

/* Text animations */
.animate-text-gradient {
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--primary-color));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

.animate-text-fade-in {
  animation: fadeIn 1s ease-out;
}

/* Staggered animation delays for grid items */
.animate-on-scroll:nth-child(1) {
  transition-delay: 0s;
}

.animate-on-scroll:nth-child(2) {
  transition-delay: 0.1s;
}

.animate-on-scroll:nth-child(3) {
  transition-delay: 0.2s;
}

.animate-on-scroll:nth-child(4) {
  transition-delay: 0.3s;
}

.animate-on-scroll:nth-child(5) {
  transition-delay: 0.4s;
}

.animate-on-scroll:nth-child(6) {
  transition-delay: 0.5s;
}

/* Loading State */
.loading {
  position: relative;
  pointer-events: none;
  opacity: 0.6;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  margin: -12px 0 0 -12px;
  border: 3px solid var(--primary-color);
  border-radius: 50%;
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

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