:root {
  /* Color Palette */
  --bg-primary: #0b0f14;
  --bg-secondary: #121821;
  --bg-card: rgba(255, 255, 255, 0.04);
  --accent-primary: #00c896;
  --accent-secondary: #f5b942;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;

  /* Spacing */
  --spacing-xs: clamp(0.5rem, 2vw, 1rem);
  --spacing-sm: clamp(1rem, 3vw, 2rem);
  --spacing-md: clamp(2rem, 5vw, 4rem);
  --spacing-lg: clamp(3rem, 7vw, 6rem);
  --spacing-xl: clamp(4rem, 10vw, 8rem);

  /* Border Radius */
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 20px;

  /* Shadows */
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(0, 200, 150, 0.2);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Layout */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 2.5rem);
}

section {
  padding-block: var(--spacing-lg);
}

.fade-in {
  animation: fadeInUp 0.8s ease-out forwards;
}

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: 1rem;
  gap: var(--spacing-sm);
}

.logo {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  text-decoration: none;
  color: transparent;
}

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

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  padding-bottom: 0.5rem;
  position: relative;
  transition: var(--transition);
}

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

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  transition: var(--transition);
}

.nav-menu a:hover::after {
  width: 100%;
}

.cta-header {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #000;
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-sm), var(--shadow-glow);
  transition: var(--transition);
  white-space: nowrap;
}

.cta-header:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 200, 150, 0.4), var(--shadow-glow);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: 0.5rem;
  background: none;
  border: none;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* Hero */
.hero {
  text-align: center;
  padding-block: var(--spacing-xl);
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--spacing-sm);
  line-height: 1.1;
}

.hero p {
  max-width: 600px;
  margin: 0 auto var(--spacing-md);
  color: var(--text-secondary);
  font-size: 1.25rem;
}

.legal-note,
.card,
.card-large {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin-block: var(--spacing-md);
  box-shadow: var(--shadow-md);
  max-width: min(800px, 100%);
  margin-inline: auto;
}

.cta-hero {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #000;
  padding: 1.25rem 3rem;
  border-radius: var(--radius-lg);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: var(--transition);
}

.cta-hero:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 50px rgba(0, 200, 150, 0.5), var(--shadow-glow);
}

/* Game Section */
.game-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-block: var(--spacing-xl);
  width: 100%;
}

.game-frame {
  width: 100%;
  max-width: 1300px;
  height: 60vh;
  min-height: 500px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 200, 150, 0.3);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  overflow: hidden;
  background: var(--bg-secondary);
  position: relative;
}

.game-frame iframe {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: inherit;
  display: block;
}

/* Content Sections */
.content-section {
  padding-block: var(--spacing-xl);
}

h2 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  text-align: center;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

/* Legal List */
.legal-list {
  list-style: none;
  display: grid;
  gap: 1rem;
}

.legal-list li {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border-left: 4px solid var(--accent-primary);
  color: var(--text-secondary);
  padding-left: 1.5rem;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.contact-form input,
.contact-form textarea {
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 200, 150, 0.2);
}

.contact-form textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-form button {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #000;
  border: none;
  padding: 1.25rem;
  border-radius: var(--radius);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  align-self: flex-start;
}

.contact-form button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-block: var(--spacing-lg);
  text-align: center;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  list-style: none;
  margin-bottom: var(--spacing-sm);
  flex-wrap: wrap;
}

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

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

.footer p {
  font-size: 0.875rem;
}

/* Utilities */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-menu a {
    padding: 0.75rem 0;
    font-size: 1.125rem;
  }

  .cta-header {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hamburger[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .hamburger[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .hamburger[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .game-frame {
    min-height: 400px;
    border-radius: var(--radius);
  }
}

@media (min-width: 769px) and (max-width: 1023px) {
  .game-frame {
    height: 650px;
  }
}

@media (min-width: 1024px) {
  .game-frame {
    height: 750px;
  }

  section {
    padding-block: var(--spacing-xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}