/* Freaze Color Scheme - Base Styles (Dark Mode) */
:root {
  --white: #1f2830;
  --light-blue: #43bfe3;
  --dark-blue: #172031;
  --text-color: #e2e8f0;
  --text-light: #a0aec0;
  --gradient-primary: linear-gradient(135deg, #43bfe3 0%, #2a9fd6 100%);
  --gradient-dark: linear-gradient(135deg, #16233c 0%, #1e3a5f 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(67, 191, 227, 0.9) 0%, rgba(22, 35, 60, 0.95) 100%);
  --box-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --box-shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  --hover-shadow: 0 12px 36px rgba(67, 191, 227, 0.2);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --light-gray: #1a1a1a;
  --gray: #333;
  --border-radius: 16px;
  --border-radius-lg: 24px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  --card-bg: #151515;
}

body, html {
  scroll-behavior: smooth;
  font-display: swap;
  background-color: #1f2830;
  font-family: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif !important;
  color: var(--text-color);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #43bfe3;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

p {
  color: var(--text-light);
  font-size: 1.0625rem;
  line-height: 1.8;
}

/* Global button styling with modern design */
.btn {
  border-radius: 12px;
  padding: 0.875rem 2rem;
  font-weight: 600;
  font-size: 0.9375rem;
  transition: var(--transition);
  letter-spacing: 0.02em;
  border: none;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.btn:hover::before {
  opacity: 1;
}

.btn:active {
  color: #f8dc15 !important;
}

    .btn-primary {
      background-color: #f8dc15;
      border-color: #f8dc15;
      color: #000;
      text-decoration: none;
    }

    .btn-primary:hover,
    .btn-primary:focus {
      background-color: #e0c712;
      border-color: #e0c712;
      color: #000;
      text-decoration: none;
    }

.btn-primary:active {
  transform: translateY(0);
  color: #f8dc15 !important;
}

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

.btn-outline-primary:hover {
  background: var(--light-blue);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(67, 191, 227, 0.3);
}

.btn-outline-light {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.8);
  color: var(--white);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--white);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--gradient-dark);
  border-color: transparent;
  color: var(--white);
  box-shadow: 0 4px 14px rgba(22, 35, 60, 0.3);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(22, 35, 60, 0.4);
  color: var(--white);
}

/* Modern animations */
@keyframes floating {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

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

.floating-animation {
  animation: floating 6s ease-in-out infinite;
}

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

.fade-in {
  animation: fadeIn 0.8s ease-out;
}

.scale-in {
  animation: scaleIn 0.5s ease-out;
}

/* Ensure proper section spacing */
section {
  position: relative;
  z-index: 1;
  padding: var(--spacing-xl) 0;
}

/* Modern section backgrounds */
.bg-gradient-light {
  background: linear-gradient(180deg, var(--white) 0%, var(--light-gray) 100%);
}

.bg-pattern {
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(67, 191, 227, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(22, 35, 60, 0.03) 0%, transparent 50%);
}

/* Glass morphism effect (Dark Mode) */
.glass-card {
  background: rgba(20, 20, 20, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Back to top button - Modern design */
#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 20px rgba(67, 191, 227, 0.4);
}

#back-to-top.show {
  opacity: 1;
  visibility: visible;
}

#back-to-top:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 6px 25px rgba(67, 191, 227, 0.5);
}

#back-to-top i {
  font-size: 1.2rem;
}

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

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

/* Smooth scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
  background: var(--light-blue);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--dark-blue);
}

/* Selection color */
::selection {
  background: var(--light-blue);
  color: var(--white);
}

::-moz-selection {
  background: var(--light-blue);
  color: var(--white);
}

/* Basic responsive adjustments */
@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
  }
  
  section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 576px) {
  .btn {
    padding: 0.65rem 1.25rem;
    font-size: 0.8125rem;
  }
  
  #back-to-top {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
  }
}

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

/* Focus styles for accessibility */
a:focus,
button:focus,
.btn:focus {
  outline: 2px solid var(--light-blue);
  outline-offset: 2px;
}