/* modern.css - Custom styling for Sreehari's Portfolio */

:root {
  --primary: #0df0d6; /* Neon Cyan */
  --primary-glow: rgba(13, 240, 214, 0.5);
  --secondary: #7000ff; /* Deep Purple */
  --bg-dark: #0a0a0f;
  --bg-card: rgba(20, 20, 25, 0.7);
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
}

/* Global Reset & Base */
html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  overflow-x: hidden;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* Glassmorphism Navigation */
.glass-nav {
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-link {
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  color: var(--text-main);
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--primary);
  transition: width 0.3s ease;
  box-shadow: 0 0 10px var(--primary-glow);
}

.nav-link:hover::after {
  width: 100%;
}

/* Glass Cards */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(13, 240, 214, 0.3), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.glass-card:hover::before {
  opacity: 1;
}

.glass-card:hover {
  border-color: rgba(13, 240, 214, 0.2);
  box-shadow: 0 8px 32px rgba(13, 240, 214, 0.1);
}

/* Typography & Glow */
.glow-text {
  text-shadow: 0 0 20px var(--primary-glow);
}

/* Buttons */
.btn-primary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 4px;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
  z-index: -1;
}

.btn-primary:hover {
  color: var(--bg-dark);
  box-shadow: 0 0 20px var(--primary-glow);
}

.btn-primary:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

.btn-secondary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Scroll Animations (Handled by IntersectionObserver in JS) */
.fade-in-section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
  will-change: opacity, visibility;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: none;
}

/* Hero specific load animations */
.slide-up-1, .slide-up-2, .slide-up-3, .slide-up-4, .slide-up-5 {
  opacity: 0;
  animation: slideUp 0.8s forwards;
}

.slide-up-1 { animation-delay: 0.2s; }
.slide-up-2 { animation-delay: 0.4s; }
.slide-up-3 { animation-delay: 0.6s; }
.slide-up-4 { animation-delay: 0.8s; }
.slide-up-5 { animation-delay: 1.0s; }

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