/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* Base Styles & Theme Variables */
:root {
  --font-headings: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Light Theme (Default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-card: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --border-color: rgba(71, 85, 105, 0.1);
  --primary-glow: rgba(37, 99, 235, 0.08);
  --secondary-glow: rgba(139, 92, 246, 0.08);
  --accent-glow: rgba(6, 182, 212, 0.08);
}

.dark {
  /* Dark Theme */
  --bg-primary: #030712;
  --bg-secondary: #0b0f19;
  --bg-card: #0f172a;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --border-color: rgba(148, 163, 184, 0.1);
  --primary-glow: rgba(37, 99, 235, 0.15);
  --secondary-glow: rgba(139, 92, 246, 0.15);
  --accent-glow: rgba(6, 182, 212, 0.15);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headings);
}

/* Glassmorphism Styles */
.glass {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.dark .glass {
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Card Glow Effect (Interactive Mouse Tracking) */
.glow-card {
  position: relative;
  border-radius: 1rem;
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.glow-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px circle at var(--mouse-x, 0) var(--mouse-y, 0),
    var(--primary-glow) 0%,
    var(--secondary-glow) 25%,
    transparent 60%
  );
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.glow-card:hover {
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
}

.dark .glow-card:hover {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* Background Grids and Blobs */
.bg-grid-glow {
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(15, 23, 66, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15, 23, 66, 0.03) 1px, transparent 1px);
}

.dark .bg-grid-glow {
  background-image: 
    linear-gradient(to right, rgba(148, 163, 184, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.05) 1px, transparent 1px);
}

/* Floating Animations */
@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(0.5deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

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

.animate-float-delayed {
  animation: float 6s ease-in-out infinite;
  animation-delay: 3s;
}

/* Pulse Animation for Glow Blobs */
@keyframes pulse-slow {
  0%, 100% { transform: scale(1) translate(0px, 0px); opacity: 0.2; }
  33% { transform: scale(1.15) translate(30px, -50px); opacity: 0.35; }
  66% { transform: scale(0.9) translate(-20px, 20px); opacity: 0.15; }
}

.animate-pulse-slow {
  animation: pulse-slow 20s ease-in-out infinite;
}

/* Typing Indicator Animation */
.cursor-typing::after {
  content: '|';
  animation: blink 0.8s infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* Timeline Components */
.timeline-item {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-item.active {
  opacity: 1;
  transform: translateY(0);
}

/* SVG System Architecture Animation */
.svg-flow-path {
  stroke-dasharray: 8, 8;
  animation: flow 1.5s linear infinite;
}

@keyframes flow {
  to {
    stroke-dashoffset: -16;
  }
}

.svg-node {
  transition: filter 0.3s ease, transform 0.3s ease;
}

.svg-node:hover {
  filter: drop-shadow(0px 0px 8px var(--accent-glow));
  transform: scale(1.05);
  transform-origin: center;
}

/* Custom Scroll Progress Indicator */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(to right, #2563eb, #8b5cf6, #06b6d4);
  width: 0%;
  z-index: 100;
  transition: width 0.1s ease;
}

/* Scroll Reveal base state */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.215, 0.61, 0.355, 1), transform 0.8s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Loading Overlay */
#loader-overlay {
  position: fixed;
  inset: 0;
  background-color: #030712;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loader-overlay.fade-out {
  opacity: 0;
  visibility: hidden;
}

/* Custom Checkbox for FAQ */
.faq-checkbox:checked ~ .faq-answer {
  max-height: 500px;
  opacity: 1;
  margin-top: 1rem;
}

.faq-checkbox:checked ~ .faq-header .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), opacity 0.3s ease, margin-top 0.3s ease;
}

/* Magnetic Button Utility */
.magnetic-btn {
  display: inline-block;
  transition: transform 0.2s cubic-bezier(0.25, 1, 0.5, 1);
}