:root {
  --bg-primary: #0F1410;
  --bg-surface: #161D18;
  --bg-surface-elevated: #1B241E;
  --border-subtle: #243328;
  --border-focus: #22C55E;
  --primary: #22C55E;
  --primary-hover: #16A34A;
  --primary-glow: rgba(34, 197, 94, 0.25);
  --text-primary: #FFFFFF;
  --text-secondary: #9CA3AF;
  --text-muted: #6B7280;
  --accent-gold: #F59E0B;
  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

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

/* Background Atmosphere */
.background-glow {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 50% 10%, rgba(34, 197, 94, 0.12) 0%, rgba(15, 20, 16, 0) 65%);
  pointer-events: none;
  z-index: 0;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: rgba(15, 20, 16, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 0 15px var(--primary-glow);
}

.brand-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--text-primary);
}

.brand-text span {
  color: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

.btn-nav {
  padding: 10px 22px;
  border-radius: 999px;
  background: var(--primary);
  color: #0F1410;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-nav:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}

.hero-title {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-title span {
  background: linear-gradient(135deg, #22C55E 0%, #4ADE80 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
  font-weight: 400;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.btn-store {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-radius: 14px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border: 1px solid var(--border-subtle);
}

.btn-store svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.btn-store .btn-text-small {
  display: block;
  font-size: 11px;
  font-weight: 400;
  opacity: 0.8;
  line-height: 1;
  margin-bottom: 3px;
}

.btn-store .btn-text-large {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.1;
}

.btn-apple {
  background: #FFFFFF;
  color: #000000;
  border-color: #FFFFFF;
}

.btn-apple:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}

.btn-google {
  background: var(--bg-surface);
  color: #FFFFFF;
  border-color: var(--border-subtle);
}

.btn-google:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--primary-glow);
}

/* Hero Showcase Image */
.hero-visual {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7), 0 0 35px rgba(34, 197, 94, 0.15);
  border: 1px solid var(--border-subtle);
}

.hero-visual img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

/* Features Grid */
.features {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 32px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.4);
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.6;
}

/* How to play / Steps */
.steps {
  padding: 80px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(22, 29, 24, 0.5) 50%, transparent 100%);
}

.step-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.step-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 28px;
  text-align: center;
}

.step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  color: #0F1410;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.step-card h4 {
  font-size: 18px;
  margin-bottom: 8px;
}

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

/* Download Smart Card Section */
.download-section {
  padding: 90px 0;
  text-align: center;
}

.download-box {
  background: radial-gradient(circle at 50% 0%, rgba(34, 197, 94, 0.15) 0%, rgba(22, 29, 24, 0.95) 75%);
  border: 1px solid var(--border-focus);
  border-radius: 28px;
  padding: 60px 40px;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 30px var(--primary-glow);
}

.download-box h2 {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 16px;
}

.download-box p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0 24px;
  margin-top: 60px;
  color: var(--text-muted);
  font-size: 14px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 24px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
  .navbar {
    padding: 14px 20px;
  }
  .nav-links {
    gap: 14px;
  }
  .hero-title {
    font-size: 36px;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .download-box {
    padding: 40px 20px;
  }
  .download-box h2 {
    font-size: 28px;
  }
}