:root {
  --bg-color: #0a0a0a;
  --card-bg: #171717;
  --text-color: #ededed;
  --text-muted: #a1a1aa;
  --primary-color: #f59e0b; /* Amber */
  --accent-color: #d4d4d4;
  --border-color: #333;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

header {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-color);
  background-image: linear-gradient(to bottom, #1a1a1a 0%, var(--bg-color) 100%);
  color: var(--text-color);
  text-align: center;
  padding: 80px 20px 20px; /* Increased top padding for mobile nav */
  position: relative;
}

header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 150px;
  background: linear-gradient(to bottom, transparent, var(--bg-color));
  pointer-events: none;
}

header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none;
}

header h1 {
  font-size: 6rem;
  margin-bottom: 10px;
  font-weight: 800;
  letter-spacing: -0.05em;
  background: linear-gradient(to bottom right, #fff, #888);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  font-size: 1.5rem;
  max-width: 600px;
  color: var(--text-muted);
  font-weight: 300;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 20px;
}

section {
  margin-bottom: 150px;
}

h2 {
  text-align: center;
  font-size: 3rem;
  margin-bottom: 60px;
  color: var(--text-color);
  font-weight: 700;
  letter-spacing: -0.03em;
}

h2 span {
  color: var(--primary-color);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  /* Prevent animations from causing horizontal scroll/layout shifts */
  overflow: hidden;
  padding: 10px;
  margin: -10px;
}

.card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  text-align: left;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--primary-color);
  box-shadow: 0 10px 30px -10px rgba(245, 158, 11, 0.15);
}

.card h3 {
  margin-bottom: 15px;
  color: var(--text-color);
  font-size: 1.5rem;
  font-weight: 600;
}

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

/* Timeline / Steps */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline-item {
  padding: 20px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  right: -10px;
  background-color: var(--bg-color);
  border: 2px solid var(--primary-color);
  top: 25px;
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 0 0 4px var(--bg-color);
}

.left {
  left: 0;
}

.right {
  left: 50%;
}

.right::after {
  left: -10px;
}

.content {
  padding: 30px;
  background-color: var(--card-bg);
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.content h3 {
  color: var(--primary-color);
  margin-bottom: 10px;
}

.content p {
  color: var(--text-muted);
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background-color: var(--border-color);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1px;
}

@media screen and (max-width: 600px) {
  .timeline::after {
    left: 31px;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  
  .timeline-item::after {
    left: 21px;
  }

  .right {
    left: 0%;
  }
}

footer {
  background-color: var(--bg-color);
  color: var(--text-muted);
  text-align: center;
  padding: 60px 20px;
  border-top: 1px solid var(--border-color);
}

footer a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
}

/* Navigation */
.top-nav {
  position: absolute;
  top: 30px;
  right: 30px;
  z-index: 100;
  display: flex;
  gap: 10px;
}

.top-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 10px 20px;
  border-radius: 100px;
  transition: all 0.3s;
  border: 1px solid transparent;
}

.top-nav a:hover {
  color: var(--text-color);
  background-color: rgba(255, 255, 255, 0.05);
}

.top-nav a.active {
  color: var(--bg-color);
  background-color: var(--text-color);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 14px 36px;
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
  border-radius: 100px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}

.btn:hover {
  background-color: var(--primary-color);
  color: var(--bg-color);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(245, 158, 11, 0.3);
}

.btn:active {
  transform: translateY(0);
}

/* Utility Classes */
.two-col {
  grid-template-columns: 1fr 1fr;
}

.header-subtitle {
  font-size: 1rem;
  margin-top: 20px;
  opacity: 0.8;
}

.instruction-block {
  max-width: 800px;
  margin: 0 auto;
}

.instruction-label {
  margin-bottom: 10px;
  color: var(--text-muted);
}

.section-intro {
  text-align: center;
  margin-bottom: 30px;
}

.btn-wrapper {
  text-align: center;
  margin-top: 30px;
}

.mb-40 {
  margin-bottom: 40px;
}

.mt-20 {
  margin-top: 20px;
}

/* Animate.css Demo Specifics */
.animate-demo [data-aos] {
  visibility: hidden;
}
.animate-demo [data-aos].animate__animated {
  visibility: visible;
}

/* Code Blocks */
/* Prism.js overrides */
:not(pre) > code[class*="language-"],
pre[class*="language-"] {
  background: #111 !important;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

code {
  background-color: rgba(255, 255, 255, 0.1);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
  color: var(--primary-color);
  font-size: 0.9em;
}

/* Override for Prism inline code if needed, or let it be */
:not(pre) > code[class*="language-"] {
  padding: 2px 6px;
}

pre {
  padding: 20px !important; /* Ensure padding */
  border-radius: 8px;
  overflow-x: auto;
  margin: 20px 0;
}

pre code {
  background-color: transparent;
  padding: 0;
  font-size: 0.9rem;
  font-family: 'Consolas', 'Monaco', 'Courier New', monospace !important;
}

.card code {
  display: block;
  margin-top: 10px;
  background-color: #111; /* Match Prism dark theme roughly */
  padding: 10px;
  border-radius: 6px;
  text-align: left; /* Code usually looks better left-aligned */
  font-size: 0.85rem;
  color: #ccc;
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow-x: auto;
}

/* Force Prism colors on card codes if they get the class */
.card code.language-html {
  background-color: #111 !important;
  text-shadow: none !important;
}

/* Mobile Responsiveness */
@media screen and (max-width: 768px) {
  header h1 {
    font-size: 3.5rem;
  }
  
  header p {
    font-size: 1.2rem;
    padding: 0 20px;
  }

  h2 {
    font-size: 2rem;
    margin-bottom: 40px;
  }

  .container {
    padding: 60px 20px;
  }
  
  section {
    margin-bottom: 100px;
  }

  .features-grid, .two-col {
    grid-template-columns: 1fr;
  }
  
  .top-nav {
    top: 20px;
    right: 0;
    left: 0;
    justify-content: center;
    width: 100%;
    padding: 0 20px;
  }

  .card {
    padding: 30px;
  }
}

@media screen and (max-width: 480px) {
  header h1 {
    font-size: 2.5rem;
  }

  .top-nav {
    flex-direction: column;
    align-items: center;
    gap: 5px;
    background: rgba(10, 10, 10, 0.9);
    padding: 15px;
    backdrop-filter: blur(10px);
    left: 20px;
    right: 20px;
    width: auto;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
  }

  .top-nav a {
    width: 100%;
    text-align: center;
  }
}