/* home.css — polish the homepage and simple subpages */

:root {
  --bg: #0b1020;
  --panel: #121a33;
  --ink: #e9eefb;
  --muted: #a7b3d8;
  --primary: #5aa9ff;
  --primary-ink: #061121;
  --ring: #2d3d73;
  --shadow: rgba(0,0,0,0.35);
  --glow: rgba(90,169,255,0.3);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { height: 100%; }
body.home {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  background: 
    radial-gradient(1400px 700px at 15% -8%, #1a2758 0%, transparent 65%),
    radial-gradient(1000px 500px at 85% 20%, #2a1a4a 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  overflow-x: hidden;
  position: relative;
}

/* Animated background particles (subtle) */
body.home::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(2px 2px at 20% 30%, rgba(90,169,255,0.15), transparent),
    radial-gradient(2px 2px at 60% 70%, rgba(167,179,216,0.1), transparent),
    radial-gradient(1px 1px at 50% 50%, rgba(90,169,255,0.2), transparent);
  background-size: 200% 200%, 180% 180%, 150% 150%;
  animation: drift 20s ease-in-out infinite;
  pointer-events: none;
  z-index: 0;
}

@keyframes drift {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -20px) rotate(120deg); }
  66% { transform: translate(-20px, 30px) rotate(240deg); }
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  position: relative;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(11, 16, 32, 0.3);
  border-bottom: 1px solid rgba(45, 61, 115, 0.2);
  transition: all 0.3s ease;
}

.logo { 
  height: 56px; 
  object-fit: contain; 
  filter: drop-shadow(0 6px 12px var(--shadow));
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.3s ease;
  cursor: pointer;
  position: relative;
}

.logo:hover {
  transform: scale(1.05) rotate(2deg);
  filter: drop-shadow(0 8px 16px var(--glow));
}

.logo:active {
  transform: scale(0.98);
}

.logo.easter-egg-active {
  animation: logoSpin 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  filter: drop-shadow(0 0 20px var(--primary)) drop-shadow(0 0 40px var(--primary));
}

@keyframes logoSpin {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(360deg) scale(1.2); }
  100% { transform: rotate(720deg) scale(1); }
}

.topnav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.topnav a {
  color: var(--ink);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  font-weight: 500;
  overflow: hidden;
}

.topnav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s ease;
}

.topnav a:hover::before {
  left: 100%;
}

.topnav a:hover { 
  background: rgba(255,255,255,0.08); 
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.topnav a.active { 
  background: var(--primary); 
  color: var(--primary-ink); 
  box-shadow: 0 4px 16px rgba(90,169,255,0.4);
}

.topnav a.active:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(90,169,255,0.5);
}

/* Layout */
main { 
  max-width: 1100px; 
  margin: 0 auto; 
  padding: 32px 20px; 
  position: relative;
  z-index: 1;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.02)), var(--panel);
  border: 1px solid var(--ring);
  box-shadow: 0 10px 30px var(--shadow);
  border-radius: 20px;
  padding: 28px;
  margin: 20px 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.2s; }
.card:nth-child(3) { animation-delay: 0.3s; }
.card:nth-child(4) { animation-delay: 0.4s; }

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(0,0,0,0.4);
  border-color: rgba(90,169,255,0.4);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.card.highlight {
  border-color: var(--primary);
  box-shadow: 0 12px 35px rgba(90,169,255,0.25);
  background: linear-gradient(180deg, rgba(90,169,255,0.08), rgba(255,255,255,0.02)), var(--panel);
}

.card.highlight:hover {
  box-shadow: 0 20px 50px rgba(90,169,255,0.35);
  border-color: var(--primary);
}

h1, h2, h3 { 
  margin: 0 0 12px 0; 
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--ink) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

h2 {
  font-size: 1.5rem;
  color: var(--ink);
}

h2 a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

h2 a:hover {
  color: var(--primary);
}

p { 
  color: var(--muted); 
  line-height: 1.6;
  margin: 12px 0;
}

.cta { 
  display: flex; 
  gap: 14px; 
  margin-top: 20px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border: 1px solid var(--ring);
  border-radius: 12px;
  color: var(--ink);
  text-decoration: none;
  background: transparent;
  font-weight: 500;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:hover { 
  transform: translateY(-2px); 
  box-shadow: 0 8px 20px var(--shadow); 
  background: rgba(255,255,255,0.08);
  border-color: rgba(90,169,255,0.3);
}

.btn.primary { 
  background: var(--primary); 
  color: var(--primary-ink); 
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(90,169,255,0.3);
}

.btn.primary::before {
  background: rgba(255,255,255,0.2);
}

.btn.primary:hover { 
  box-shadow: 0 10px 28px rgba(90,169,255,0.45);
  transform: translateY(-3px);
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 32px 20px;
  color: var(--muted);
  opacity: .8;
  position: relative;
  z-index: 1;
  margin-top: 60px;
  border-top: 1px solid rgba(45, 61, 115, 0.2);
}

/* Easter Egg Styles */
.easter-egg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(90,169,255,0.1) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.easter-egg-overlay.active {
  opacity: 1;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.1); opacity: 0.5; }
}

.easter-egg-message {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  background: linear-gradient(135deg, var(--panel), rgba(90,169,255,0.2));
  border: 2px solid var(--primary);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 40px var(--glow);
  z-index: 1001;
  text-align: center;
  max-width: 400px;
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.easter-egg-message.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.easter-egg-message h3 {
  color: var(--primary);
  font-size: 1.8rem;
  margin-bottom: 16px;
  text-shadow: 0 0 20px var(--glow);
}

.easter-egg-message p {
  color: var(--ink);
  font-size: 1.1rem;
  margin: 12px 0;
}

/* Responsive */
@media (max-width: 768px) {
  .site-header {
    flex-direction: column;
    gap: 16px;
    padding: 16px;
  }
  
  .topnav {
    justify-content: center;
    width: 100%;
  }
  
  .topnav a {
    font-size: 0.9rem;
    padding: 8px 12px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .card {
    padding: 20px;
  }
  
  .cta {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
}