:root {
  --primary: #06b6d4;
  --primary-glow: rgba(6, 182, 212, 0.5);
  --secondary: #0891b2;
  --accent: #67e8f9;
  --accent-glow: rgba(103, 232, 249, 0.3);
  --bg-start: #042f2e;
  --bg-mid: #134e4a;
  --bg-end: #021716;
  --card-bg: rgba(19, 78, 74, 0.6);
  --card-border: rgba(6, 182, 212, 0.25);
  --text-light: #f0fdfa;
  --text-dim: #ccfbf1;
}

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

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=JetBrains+Mono&display=swap');

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 400;
  background: linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 50%, var(--bg-end) 100%);
  color: var(--text-light);
  line-height: 1.6;
  min-height: 100vh;
}

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

header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(4, 47, 46, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--card-border);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 0;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  text-shadow: 0 0 20px var(--primary-glow);
}

.nav-links {
  display: flex;
  gap: 32px;
  align-items: center;
  list-style: none;
}

.nav-links a {
  color: var(--text-light);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.4s ease-out;
}

.nav-links a:hover {
  color: var(--accent);
  text-shadow: 0 0 15px var(--accent-glow);
  transform: scale(1.03);
}

.age-badge {
  background: linear-gradient(135deg, #dc2626, #991b1b);
  color: white;
  padding: 6px 12px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 4px 15px rgba(220, 38, 38, 0.4);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  transition: 0.4s ease-out;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(4, 47, 46, 0.9), rgba(2, 23, 22, 0.8)), url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><circle cx="600" cy="300" r="250" fill="none" stroke="rgba(6,182,212,0.1)" stroke-width="2"/><path d="M 400 150 L 600 50 L 800 150 L 750 400 L 450 400 Z" fill="none" stroke="rgba(103,232,249,0.15)" stroke-width="3"/></svg>');
  background-size: cover;
  background-position: center;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  padding: 100px 20px 60px;
  animation: fadeInUp 1s ease-out;
}

.hero h1 {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 24px;
  text-shadow: 0 0 30px var(--primary-glow);
  line-height: 1.2;
}

.hero p {
  font-size: 22px;
  margin-bottom: 40px;
  color: var(--text-dim);
}

.cta-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 18px 48px;
  border-radius: 16px;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  transition: all 0.4s ease-out;
  box-shadow: 0 8px 25px var(--primary-glow), inset 0 -2px 8px rgba(0,0,0,0.2);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  transform: scale(1.03) translateY(-2px);
  box-shadow: 0 12px 35px var(--primary-glow), inset 0 -2px 8px rgba(0,0,0,0.2);
}

.cta-button:active {
  transform: scale(0.98);
  box-shadow: 0 4px 15px var(--primary-glow), inset 0 2px 8px rgba(0,0,0,0.3);
}

section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 60px;
  text-shadow: 0 0 20px var(--primary-glow);
}

.download-section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 60px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
}

.download-form {
  max-width: 500px;
  margin: 0 auto;
}

.download-form input {
  width: 100%;
  padding: 16px 24px;
  border-radius: 12px;
  border: 2px solid var(--card-border);
  background: rgba(4, 47, 46, 0.6);
  color: var(--text-light);
  font-size: 16px;
  margin-bottom: 20px;
  transition: all 0.4s ease-out;
}

.download-form input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--primary-glow);
}

.success-message {
  display: none;
  padding: 24px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(8, 145, 178, 0.2));
  border: 2px solid var(--primary);
  border-radius: 12px;
  margin-top: 20px;
  animation: fadeIn 0.5s ease-out;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 40px 32px;
  text-align: center;
  transition: all 0.4s ease-out;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2), inset 0 1px 0 rgba(255,255,255,0.05);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, var(--accent-glow), transparent);
  transform: rotate(45deg);
  transition: all 0.6s ease-out;
  opacity: 0;
}

.feature-card:hover::before {
  opacity: 1;
  animation: shimmer 2s infinite;
}

.feature-card:hover {
  transform: scale(1.03) translateY(-8px);
  box-shadow: 0 12px 40px var(--primary-glow), inset 0 1px 0 rgba(255,255,255,0.1);
  border-color: var(--primary);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 15px var(--primary-glow));
}

.feature-card h3 {
  font-size: 24px;
  margin-bottom: 12px;
  color: var(--accent);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  margin-bottom: 16px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  transition: all 0.4s ease-out;
}

.faq-item:hover {
  border-color: var(--primary);
  box-shadow: 0 6px 25px var(--primary-glow);
}

.faq-question {
  padding: 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.4s ease-out;
}

.faq-question:hover {
  color: var(--accent);
}

.faq-toggle {
  font-size: 24px;
  transition: transform 0.4s ease-out;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
  padding: 0 24px;
  color: var(--text-dim);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 24px;
}

.faq-item.active .faq-toggle {
  transform: rotate(180deg);
}

.disclaimer-section {
  background: rgba(220, 38, 38, 0.15);
  border: 2px solid rgba(220, 38, 38, 0.4);
  border-radius: 16px;
  padding: 40px;
  text-align: center;
  margin: 60px 0;
}

footer {
  background: rgba(4, 47, 46, 0.9);
  padding: 60px 0 30px;
  border-top: 1px solid var(--card-border);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-dim);
  text-decoration: none;
  transition: all 0.4s ease-out;
}

.footer-links a:hover {
  color: var(--accent);
  text-shadow: 0 0 10px var(--accent-glow);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--card-border);
  color: var(--text-dim);
}

.large-age-badge {
  display: inline-block;
  background: linear-gradient(135deg, #dc2626, #991b1b);
  color: white;
  padding: 20px 40px;
  border-radius: 16px;
  font-weight: 700;
  font-size: 32px;
  margin: 20px 0;
  box-shadow: 0 8px 30px rgba(220, 38, 38, 0.5);
}

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal-content {
  background: linear-gradient(135deg, var(--bg-start), var(--bg-mid));
  padding: 60px;
  border-radius: 16px;
  text-align: center;
  max-width: 500px;
  border: 2px solid var(--card-border);
  box-shadow: 0 15px 50px rgba(0,0,0,0.5);
}

.modal-content h2 {
  color: #dc2626;
  margin-bottom: 20px;
  font-size: 32px;
}

.modal-buttons {
  display: flex;
  gap: 20px;
  margin-top: 30px;
  justify-content: center;
}

.modal-button {
  padding: 14px 32px;
  border: none;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.4s ease-out;
  font-size: 16px;
}

.btn-confirm {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
}

.btn-decline {
  background: rgba(220, 38, 38, 0.8);
  color: white;
}

.modal-button:hover {
  transform: scale(1.03);
}

.scoring-table {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  margin: 40px 0;
}

.scoring-table th,
.scoring-table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
}

.scoring-table th {
  background: rgba(6, 182, 212, 0.2);
  font-weight: 700;
  color: var(--accent);
}

.scoring-table tr:hover {
  background: rgba(6, 182, 212, 0.1);
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin: 40px 0;
}

.tip-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 32px;
  transition: all 0.4s ease-out;
}

.tip-card:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 30px var(--primary-glow);
  border-color: var(--primary);
}

.content-page {
  padding-top: 120px;
  min-height: 100vh;
}

.content-box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 60px;
  margin: 40px 0;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.content-box h2 {
  color: var(--accent);
  margin: 40px 0 20px;
}

.content-box p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes shimmer {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: 70%;
    background: rgba(4, 47, 46, 0.98);
    flex-direction: column;
    padding: 100px 40px;
    transition: right 0.4s ease-out;
    backdrop-filter: blur(10px);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .hero p {
    font-size: 18px;
  }
  
  .section-title {
    font-size: 32px;
  }
  
  .download-section {
    padding: 40px 24px;
  }
  
  .modal-content {
    padding: 40px 24px;
    margin: 20px;
  }
  
  .content-box {
    padding: 32px 24px;
  }
  
  .large-age-badge {
    font-size: 24px;
    padding: 16px 32px;
  }
}