/* Math Zombie Survival - Global Stylesheet */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@600;800;900&family=Space+Grotesk:wght@500;700&family=JetBrains+Mono:wght@500;700&display=swap');

:root {
  --bg-dark: #0a0d14;
  --bg-deep: #05070a;
  --panel-bg: rgba(255, 255, 255, 0.03);
  --panel-border: rgba(255, 255, 255, 0.07);
  --panel-border-hover: rgba(255, 255, 255, 0.15);
  
  --accent-orange: #ff5f1f;
  --accent-orange-glow: rgba(255, 95, 31, 0.35);
  --accent-yellow: #ffcc00;
  --accent-yellow-glow: rgba(255, 204, 0, 0.3);
  --accent-green: #39ff14;
  --accent-green-glow: rgba(57, 255, 20, 0.35);
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  
  --font-title: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-accent: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --blur-radius: 16px;
}

/* Base resets & scrollbar */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-dark);
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background: radial-gradient(circle at 50% 0%, #161c2b 0%, var(--bg-dark) 80%);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-orange);
}

/* Glassmorphism Panel styles */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(var(--blur-radius)) saturate(160%);
  -webkit-backdrop-filter: blur(var(--blur-radius)) saturate(160%);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: 0 10px 30px 0 rgba(0, 0, 0, 0.4);
  transition: var(--transition-smooth);
}

.glass-panel:hover {
  border-color: var(--panel-border-hover);
  box-shadow: 0 15px 35px 0 rgba(0, 0, 0, 0.5);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 2;
}

/* Navigation bar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(10, 13, 20, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text-primary);
}

.logo span.math {
  color: var(--accent-orange);
}

.logo span.zombie {
  color: var(--accent-green);
  text-shadow: 0 0 10px var(--accent-green-glow);
}

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

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-family: var(--font-accent);
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

nav a:hover, nav a.active {
  color: var(--text-primary);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  border-radius: 12px;
  font-family: var(--font-accent);
  font-weight: 700;
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition-smooth);
  cursor: pointer;
  gap: 0.5rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent-green);
  color: var(--bg-deep);
  box-shadow: 0 0 20px var(--accent-green-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(57, 255, 20, 0.6);
  background: #4eff30;
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--accent-orange);
  box-shadow: 0 0 15px rgba(255, 95, 31, 0.1);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--accent-orange);
  color: var(--text-primary);
  box-shadow: 0 0 25px var(--accent-orange-glow);
}

/* Hero Section */
.hero {
  padding: 160px 0 100px 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-tag {
  display: inline-block;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  background: rgba(255, 204, 0, 0.1);
  border: 1px solid rgba(255, 204, 0, 0.2);
  color: var(--accent-yellow);
  font-family: var(--font-accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 4.5rem;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}

.hero h1 span.highlight {
  color: var(--accent-orange);
}

.hero p.subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.hero-art-container {
  position: relative;
}

.hero-art {
  width: 100%;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  position: relative;
  z-index: 2;
  transition: var(--transition-smooth);
}

.hero-art-container::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 110%;
  height: 110%;
  background: radial-gradient(circle, var(--accent-green-glow) 0%, transparent 60%);
  z-index: 1;
  pointer-events: none;
}

/* Leaderboard Section */
.ranking-section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-family: var(--font-title);
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.section-header h2 span {
  color: var(--accent-yellow);
}

.section-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Liquid Glass Leaderboard */
.leaderboard-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2.5rem;
}

.leaderboard-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.live-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-green);
  letter-spacing: 0.05em;
}

.live-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  position: relative;
  animation: pulse-green 1.5s infinite;
}

.last-update {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.leaderboard-row {
  display: flex;
  align-items: center;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.04);
  transition: var(--transition-smooth);
}

.leaderboard-row:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.1);
  transform: scale(1.015);
}

.leaderboard-row.podium-1 {
  background: linear-gradient(90deg, rgba(255, 204, 0, 0.05) 0%, rgba(255, 255, 255, 0.015) 100%);
  border-color: rgba(255, 204, 0, 0.2);
}
.leaderboard-row.podium-2 {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  border-color: rgba(255, 255, 255, 0.15);
}
.leaderboard-row.podium-3 {
  background: linear-gradient(90deg, rgba(255, 95, 31, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  border-color: rgba(255, 95, 31, 0.15);
}

.rank {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: 1.2rem;
  width: 40px;
  color: var(--text-secondary);
}

.podium-1 .rank { color: var(--accent-yellow); font-size: 1.4rem; }
.podium-2 .rank { color: #e5e7eb; font-size: 1.3rem; }
.podium-3 .rank { color: #d97706; font-size: 1.25rem; }

.player-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-grow: 1;
}

.player-avatar {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-accent);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.podium-1 .player-avatar { border-color: var(--accent-yellow); background: rgba(255, 204, 0, 0.1); }
.podium-2 .player-avatar { border-color: rgba(255, 255, 255, 0.3); }
.podium-3 .player-avatar { border-color: var(--accent-orange); background: rgba(255, 95, 31, 0.1); }

.player-name {
  font-weight: 600;
  font-size: 1rem;
}

.player-stats {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.stat-val {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
}

.score-val {
  color: var(--accent-green);
  text-shadow: 0 0 8px var(--accent-green-glow);
}

/* Features Section */
.features-section {
  padding: 100px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2.5rem;
}

.feature-card {
  padding: 3rem 2rem;
  text-align: left;
  position: relative;
  overflow: hidden;
}

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--accent-orange);
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon-wrapper {
  transform: scale(1.1) rotate(5deg);
  background: rgba(255, 95, 31, 0.1);
  border-color: var(--accent-orange);
  color: var(--accent-orange);
}

.feature-card.alt:hover .feature-icon-wrapper {
  background: rgba(57, 255, 20, 0.1);
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.feature-card h3 {
  font-family: var(--font-title);
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.card-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--accent-orange-glow) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.feature-card:hover .card-glow {
  opacity: 1;
}

.feature-card.alt .card-glow {
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), var(--accent-green-glow) 0%, transparent 50%);
}

/* Community Section */
.community-section {
  padding: 100px 0 160px 0;
  text-align: center;
}

.community-box {
  padding: 5rem 2rem;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.community-box h2 {
  font-family: var(--font-title);
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.community-box h2 span {
  color: var(--accent-orange);
}

.community-box p {
  color: var(--text-secondary);
  max-width: 550px;
  margin: 0 auto 2.5rem auto;
  font-size: 1.1rem;
}

/* Footer */
footer {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: var(--bg-deep);
  padding: 3rem 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  text-decoration: none;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

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

/* Animations */
@keyframes pulse-green {
  0% {
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0.7);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(57, 255, 20, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(57, 255, 20, 0);
  }
}

/* Responsiveness */
@media (max-width: 992px) {
  .hero {
    padding: 120px 0 80px 0;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero h1 {
    font-size: 3.5rem;
  }
  
  .hero p.subtitle {
    margin: 0 auto 2.5rem auto;
  }
  
  .hero-ctas {
    justify-content: center;
  }
  
  .hero-art-container {
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav-container {
    height: 70px;
  }
  
  nav {
    display: none; /* Can be toggled with JS mobile menu */
  }
  
  .hero h1 {
    font-size: 2.8rem;
  }
  
  .section-header h2 {
    font-size: 2.2rem;
  }
  
  .leaderboard-container {
    padding: 1.5rem 1rem;
  }
  
  .player-stats {
    gap: 1rem;
  }
  
  .stat-val {
    font-size: 0.95rem;
  }
  
  .community-box {
    padding: 3rem 1.5rem;
  }
  
  .community-box h2 {
    font-size: 2.2rem;
  }
}