:root {
  --bg: #0b1120;
  --bg-soft: #111827;
  --accent: #0ea5e9;
  --accent-hover: #0284c7;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --card-bg: rgba(30, 41, 59, 0.5);
  --card-border: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(14, 165, 233, 0.15), transparent 25%),
    radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.15), transparent 25%);
}

/* Navbar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 8%;
  background: rgba(11, 17, 32, 0.8);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--card-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  border-radius: 50%;
  font-weight: 900;
  font-size: 20px;
  font-family: Georgia, serif;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-btn {
  padding: 10px 20px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s;
}

.nav-btn.primary {
  background: var(--accent);
  color: #fff;
}

.nav-btn.primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.4);
}

/* Hero Section */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  padding: 80px 8%;
  align-items: center;
  flex: 1;
}

.hero-title {
  font-size: 56px;
  line-height: 1.1;
  font-weight: 900;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.hero-title span {
  background: linear-gradient(135deg, #0ea5e9, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 16px;
}

.btn {
  padding: 16px 32px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-block;
}

.btn.primary-large {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.3);
}

.btn.primary-large:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(14, 165, 233, 0.4);
}

.btn.secondary-large {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid var(--card-border);
}

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

/* Stamp Preview CSS Art */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.stamp-preview-wrapper {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 40px;
  border-radius: 24px;
  backdrop-filter: blur(20px);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
  transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
  transition: transform 0.5s ease;
}

.stamp-preview-wrapper:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.stamp-preview {
  width: 250px;
  height: 250px;
  position: relative;
  color: var(--accent);
  font-family: Georgia, serif;
}

.stamp-outer-ring {
  position: absolute;
  inset: 0;
  border: 8px solid var(--accent);
  border-radius: 50%;
}

.stamp-inner-ring {
  position: absolute;
  inset: 15px;
  border: 4px solid var(--accent);
  border-radius: 50%;
}

.stamp-top-text {
  position: absolute;
  top: 25px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 2px;
}

.stamp-bottom-text {
  position: absolute;
  bottom: 25px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 2px;
}

.stamp-center-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  font-weight: 900;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 40px 8% 80px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  padding: 32px;
  border-radius: 16px;
  transition: transform 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  background: rgba(30, 41, 59, 0.8);
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  font-weight: 600;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
}

.footer {
  text-align: center;
  padding: 32px;
  border-top: 1px solid var(--card-border);
  color: var(--text-muted);
  font-size: 14px;
  margin-top: auto;
}

@media (max-width: 968px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-subtitle {
    margin: 0 auto 40px;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .stamp-preview-wrapper {
    transform: none;
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 40px;
  }
}