/* ============================================
   KrexTech Corporate Website - Design System
   ============================================ */

/* === CSS Variables === */
:root {
  /* Green-Blue Color Palette */
  --primary: #0EA5E9;
  --primary-dark: #0284C7;
  --primary-light: #38BDF8;
  --secondary: #10B981;
  --secondary-dark: #059669;
  --secondary-light: #34D399;
  --accent: #8B5CF6;
  --accent-light: #A78BFA;

  /* Neutral Colors */
  --dark: #0F172A;
  --dark-secondary: #1E293B;
  --dark-tertiary: #334155;
  --gray: #64748B;
  --gray-light: #94A3B8;
  --light: #F1F5F9;
  --white: #FFFFFF;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  --gradient-dark: linear-gradient(135deg, var(--dark) 0%, var(--dark-secondary) 100%);
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0EA5E9 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Poppins', var(--font-primary);

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --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);
  --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.3);

  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;

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

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  color: var(--dark);
  background-color: var(--white);
  line-height: 1.6;
  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-sm);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray);
  font-size: 1.1rem;
}

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

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

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

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-md);
}

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

/* === Navigation === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: 1rem 0;
  box-shadow: var(--shadow-md);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.navbar-brand img {
  height: 50px;
  width: 50px;
  border-radius: 50%;
  object-fit: cover;
}

.navbar-brand h3 {
  color: var(--white);
  margin: 0;
  font-size: 1.5rem;
}

.navbar-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.navbar-menu a {
  color: var(--white);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.navbar-menu a:hover,
.navbar-menu a.active {
  background: rgba(14, 165, 233, 0.2);
  color: var(--primary-light);
}

.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: center;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  font-family: var(--font-primary);
}

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

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

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

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

.btn-outline {
  background: transparent;
  border-color: var(--white);
  color: var(--white);
}

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

.btn-whatsapp {
  background: #25D366;
  color: var(--white);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-whatsapp:hover {
  background: #20BA5A;
  transform: translateY(-2px);
}

/* === Hero Section === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
}

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

.hero-content {
  max-width: 700px;
  animation: fadeInUp 1s ease;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero p {
  color: var(--gray-light);
  font-size: 1.3rem;
  margin-bottom: var(--spacing-md);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  max-width: 500px;
  opacity: 0.2;
}

/* === Cards === */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: var(--transition);
}

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

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

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  font-size: 2rem;
  color: var(--white);
}

.card h3 {
  color: var(--dark);
  margin-bottom: var(--spacing-sm);
}

.card p {
  color: var(--gray);
  font-size: 1rem;
}

/* Glass Card */
.card-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--white);
}

.card-glass h3 {
  color: var(--white);
}

.card-glass p {
  color: var(--gray-light);
}

/* === 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);
}

/* Two column content layout (responsive) */
.content-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

/* === Section Styles === */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-lg);
}

.section-title {
  color: var(--dark);
  margin-bottom: var(--spacing-sm);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.section-subtitle {
  color: var(--primary);
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-xs);
}

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

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--dark);
}

.form-control {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--light);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-family: var(--font-primary);
  transition: var(--transition);
  background: var(--white);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

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

/* === Footer === */
.footer {
  background: var(--gradient-dark);
  color: var(--white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer h4 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 0.5rem;
}

.footer a {
  color: var(--gray-light);
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: var(--gray-light);
}

.footer img {
  border-radius: 50%;
}

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

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

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

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

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

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

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

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

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

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

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

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

.mt-1 {
  margin-top: var(--spacing-xs);
}

.mt-2 {
  margin-top: var(--spacing-sm);
}

.mt-3 {
  margin-top: var(--spacing-md);
}

.mt-4 {
  margin-top: var(--spacing-lg);
}

.mb-1 {
  margin-bottom: var(--spacing-xs);
}

.mb-2 {
  margin-bottom: var(--spacing-sm);
}

.mb-3 {
  margin-bottom: var(--spacing-md);
}

.mb-4 {
  margin-bottom: var(--spacing-lg);
}

.p-1 {
  padding: var(--spacing-xs);
}

.p-2 {
  padding: var(--spacing-sm);
}

.p-3 {
  padding: var(--spacing-md);
}

.p-4 {
  padding: var(--spacing-lg);
}

/* === Responsive Design === */
@media (max-width: 968px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .hero-image {
    display: none;
  }

  /* Reduce spacing on tablets */
  section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 768px) {

  /* Navigation */
  .navbar-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--dark);
    flex-direction: column;
    padding: var(--spacing-md);
    transition: var(--transition);
    gap: 0;
  }

  .navbar-menu.active {
    left: 0;
  }

  .navbar-menu li {
    width: 100%;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }

  .navbar-menu a {
    display: block;
    width: 100%;
    padding: 1rem;
  }

  .navbar-toggle {
    display: block;
  }

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

  /* Convert 2-column content layouts to single column */
  .content-2col {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  /* Hero optimizations */
  .hero {
    min-height: 80vh;
    padding-top: 100px;
  }

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

  .btn {
    width: 100%;
  }

  /* Typography - smaller on mobile */
  h1 {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  h2 {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }

  h3 {
    font-size: clamp(1.3rem, 5vw, 1.75rem);
  }

  p {
    font-size: 1rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  /* Section spacing */
  section {
    padding: var(--spacing-md) 0;
  }

  /* Container padding */
  .container {
    padding: 0 var(--spacing-sm);
  }

  /* Cards */
  .card {
    padding: var(--spacing-sm);
  }
}

@media (max-width: 480px) {

  /* Extra small screens */
  html {
    font-size: 14px;
  }

  .navbar {
    padding: 0.75rem 0;
  }

  .navbar-brand img {
    height: 40px;
    width: 40px;
  }

  .navbar-brand h3 {
    font-size: 1.2rem;
  }

  .hero {
    min-height: 70vh;
    padding-top: 80px;
  }

  .hero-buttons {
    gap: 0.75rem;
  }

  .btn {
    padding: 0.875rem 1.5rem;
    font-size: 0.95rem;
  }

  .card-icon {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
  }

  /* Footer */
  .footer {
    padding: var(--spacing-md) 0 var(--spacing-sm);
  }

  .footer-content {
    gap: var(--spacing-sm);
  }

  .footer img {
    height: 50px;
  }

  /* Stats section - smaller numbers */
  #stats h2 {
    font-size: 2rem !important;
  }

  /* Form */
  .form-control {
    padding: 0.875rem;
    font-size: 0.95rem;
  }
}

/* Landscape orientation fix for mobile */
@media (max-width: 968px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: 100px 0 var(--spacing-lg);
  }
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transition: var(--transition-slow);
}

.animate-on-scroll.animated {
  opacity: 1;
  animation: fadeInUp 0.8s ease forwards;
}