/* Modern IT Company Design - SmartSolTech */
:root {
  /* Light Theme Colors */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #8b5cf6;
  --accent-color: #06d6a0;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --bg-light: #ffffff;
  --bg-gray: #f9fafb;
  --border-color: #e5e7eb;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --gradient-accent: linear-gradient(135deg, #06d6a0 0%, #34d399 100%);
  
  /* Dark Theme Colors */
  --dark-bg: #0f172a;
  --dark-bg-secondary: #1e293b;
  --dark-text: #f8fafc;
  --dark-text-secondary: #cbd5e1;
  --dark-border: #334155;
}

/* Dark theme */
[data-theme="dark"] {
  --text-dark: var(--dark-text);
  --text-light: var(--dark-text-secondary);
  --bg-light: var(--dark-bg);
  --bg-gray: var(--dark-bg-secondary);
  --border-color: var(--dark-border);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-light);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 {
  font-size: 3.75rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h2 {
  font-size: 2.5rem;
  color: var(--text-dark);
}

h3 {
  font-size: 1.875rem;
}

p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

/* Buttons */
.btn-modern {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

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

.btn-primary-modern:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.4);
  color: white;
}

.btn-secondary-modern {
  background: var(--bg-light);
  color: var(--text-dark);
  border: 2px solid var(--border-color);
}

.btn-secondary-modern:hover {
  background: var(--bg-gray);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

/* Cards */
.card-modern {
  background: var(--bg-light);
  border-radius: 20px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  overflow: hidden;
}

.card-modern:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.card-modern .card-body {
  padding: 2rem;
}

/* Navigation */
.navbar-modern {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: all 0.3s ease;
}

.navbar-modern.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
}

.navbar-brand-modern {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
}

.nav-link-modern {
  font-weight: 500;
  color: var(--text-light);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  text-decoration: none;
}

.nav-link-modern:hover,
.nav-link-modern.active {
  color: var(--primary-color);
  background: rgba(99, 102, 241, 0.1);
}

/* Hero Section */
.hero-modern {
  padding: 8rem 0 4rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
  position: relative;
  overflow: hidden;
}

.hero-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="0.5" fill="%236366f1" opacity="0.1"/><circle cx="75" cy="75" r="0.3" fill="%238b5cf6" opacity="0.1"/><circle cx="75" cy="25" r="0.4" fill="%2306d6a0" opacity="0.1"/><circle cx="25" cy="75" r="0.6" fill="%236366f1" opacity="0.05"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  opacity: 0.5;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.service-card {
  background: var(--bg-light);
  border-radius: 20px;
  padding: 2.5rem;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: translateX(-100%);
  transition: transform 0.3s ease;
}

.service-card:hover::before {
  transform: translateX(0);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  color: white;
  font-size: 1.5rem;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Dark mode toggle */
.theme-toggle {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: none;
  color: white;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  z-index: 1000;
}

.theme-toggle:hover {
  transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  .hero-modern {
    padding: 6rem 0 3rem;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .service-card {
    padding: 2rem;
  }
}

/* Utility Classes */
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.border-gradient {
  border: 2px solid transparent;
  background: linear-gradient(var(--bg-light), var(--bg-light)) padding-box,
              var(--gradient-primary) border-box;
}

.container-modern {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

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

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

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

/* Loading Animation */
#loading-screen {
  transition: opacity 0.3s ease-out;
}

#loading-screen.hidden {
  opacity: 0 !important;
  pointer-events: none !important;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Success Checkmark Animation */
.success-checkmark {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: block;
  stroke-width: 2;
  stroke: #4CAF50;
  stroke-miterlimit: 10;
  margin: 10px auto;
  position: relative;
}

.success-checkmark.animate .icon-circle {
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  stroke-width: 2;
  stroke-miterlimit: 10;
  stroke: #4CAF50;
  fill: none;
  animation: stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.success-checkmark.animate .icon-line {
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  animation: stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.8s forwards;
}

.success-checkmark.animate .icon-line.line-tip {
  animation-delay: 1.1s;
}

.success-checkmark.animate .icon-line.line-long {
  animation-delay: 1.2s;
}

.success-checkmark .icon-circle {
  width: 80px;
  height: 80px;
  position: absolute;
  border-radius: 50%;
  border: 2px solid #4CAF50;
  background-color: rgba(76, 175, 80, 0.1);
}

.success-checkmark .icon-line {
  height: 2px;
  background-color: #4CAF50;
  display: block;
  border-radius: 2px;
  position: absolute;
  z-index: 10;
}

.success-checkmark .icon-line.line-tip {
  top: 46px;
  left: 14px;
  width: 25px;
  transform: rotate(45deg);
  animation: icon-line-tip 0.75s;
}

.success-checkmark .icon-line.line-long {
  top: 38px;
  right: 8px;
  width: 47px;
  transform: rotate(-45deg);
  animation: icon-line-long 0.75s;
}

.success-checkmark .icon-fix {
  top: 8px;
  width: 5px;
  left: 26px;
  z-index: 1;
  height: 85px;
  position: absolute;
  transform: rotate(-45deg);
  background-color: #fff;
}

@keyframes stroke {
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes icon-line-tip {
  0% { 
    width: 0; 
    left: 1px; 
    top: 19px; 
  }
  54% { 
    width: 0; 
    left: 1px; 
    top: 19px; 
  }
  70% { 
    width: 50px; 
    left: -8px; 
    top: 37px; 
  }
  84% { 
    width: 17px; 
    left: 21px; 
    top: 48px; 
  }
  100% { 
    width: 25px; 
    left: 14px; 
    top: 45px; 
  }
}

@keyframes icon-line-long {
  0% { 
    width: 0; 
    right: 46px; 
    top: 54px; 
  }
  65% { 
    width: 0; 
    right: 46px; 
    top: 54px; 
  }
  84% { 
    width: 55px; 
    right: 0px; 
    top: 35px; 
  }
  100% { 
    width: 47px; 
    right: 8px; 
    top: 38px; 
  }
}