:root {
  --btc-orange: #F7931A;
  --btc-orange-hover: #e08214;
  --bg-dark: #111111;
  --bg-card: #1c1c1c;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --border-color: #333333;
  --container-width: 1200px;
  --spacing-unit: 1rem;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--btc-orange);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  text-decoration: underline;
  color: var(--btc-orange-hover);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
}

/* Header */
header {
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem 0;
  position: sticky;
  /* Make header sticky */
  top: 0;
  background-color: rgba(17, 17, 17, 0.95);
  /* Semi-transparent background */
  backdrop-filter: blur(10px);
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  /* Remove underline from logo link */
}

.logo-icon {
  color: var(--btc-orange);
}

nav ul {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav a {
  color: var(--text-secondary);
  font-weight: 500;
  text-decoration: none;
}

nav a:hover,
nav a.active {
  color: var(--btc-orange);
}

/* Hero Section */
.hero {
  padding: 8rem 0 0rem;
  text-align: center;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  line-height: 1.1;
  background: linear-gradient(to right, #fff, #a0a0a0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .subtitle {
  font-size: 1.5rem;
  color: var(--btc-orange);
  margin-bottom: 2rem;
  font-weight: 600;
}

.hero p {
  color: var(--text-secondary);
  font-size: 1.25rem;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.cta-button {
  display: inline-block;
  background-color: var(--btc-orange);
  color: #fff;
  font-weight: 700;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-size: 1.125rem;
  transition: transform 0.2s, background-color 0.2s;
  text-decoration: none;
}

.cta-button:hover {
  background-color: var(--btc-orange-hover);
  transform: translateY(-2px);
  text-decoration: none;
}

/* Features Grid */
.features {
  padding: 0rem 0;
  background-color: var(--bg-dark);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 4rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--bg-card);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--btc-orange);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--btc-orange);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

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

/* Why Bitcoin Only */
.philosophy {
  padding: 6rem 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: linear-gradient(rgba(247, 147, 26, 0.05), rgba(17, 17, 17, 0));
}

.philosophy-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.philosophy h2 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
}

.philosophy ul {
  list-style: none;
  text-align: left;
  margin-top: 2rem;
}

.philosophy li {
  margin-bottom: 1rem;
  padding-left: 2rem;
  position: relative;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.philosophy li::before {
  content: "✓";
  color: var(--btc-orange);
  position: absolute;
  left: 0;
  font-weight: bold;
}


/* Pro Section */
.pro-features {
  padding: 3rem 0;
}

.pro-badge {
  background-color: var(--btc-orange);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: bold;
  vertical-align: middle;
  margin-left: 0.5rem;
}

/* Policy Pages */
.policy-content {
  max-width: 800px;
  margin: 4rem auto;
  padding: 0 var(--spacing-unit);
}

.policy-content h1 {
  font-size: 2.5rem;
  margin-bottom: 2rem;
  color: var(--text-primary);
}

.policy-content h2 {
  font-size: 1.75rem;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.policy-content h3 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.policy-content p,
.policy-content ul {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.policy-content ul {
  padding-left: 1.5rem;
}

.policy-content li {
  margin-bottom: 0.5rem;
}


/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 4rem 0;
  margin-top: auto;
  /* Push footer to bottom */
  background-color: var(--bg-dark);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--btc-orange);
}

.copyright {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}