/* Базовые стили */
body {
  margin: 0;
  padding: 0;
  background: #10121e;
  color: #fffbe6;
  font-family: 'Montserrat', Arial, sans-serif;
  min-height: 100vh;
}

main {
  max-width: 820px;
  margin: 40px auto 32px auto;
  background: rgba(24,28,43,0.98);
  border-radius: 18px;
  box-shadow: 0 8px 40px #000a;
  padding: 32px 32px 24px 32px;
}

header {
  background: transparent;
  padding: 24px 0 0 0;
  text-align: center;
}

nav {
  margin-bottom: 18px;
}
.nav-link {
  color: #ffd700;
  text-decoration: none;
  font-weight: bold;
  margin: 0 18px;
  font-size: 18px;
  transition: color 0.2s;
}
.nav-link:hover {
  color: #fffbe6;
  text-shadow: 0 0 8px #ffd70088;
}

.hero {
  text-align: center;
  margin-bottom: 36px;
}
.logo {
  width: 120px;
  height: 120px;
  margin-bottom: 8px;
}
h1 {
  font-family: 'Orbitron', Arial, sans-serif;
  font-size: 2.7em;
  color: #ffd700;
  margin: 0 0 8px 0;
  letter-spacing: 2px;
}
.subtitle {
  font-size: 1.2em;
  color: #fffbe6;
  margin-bottom: 18px;
}

.main-btn {
  display: inline-block;
  background: linear-gradient(90deg, #ffd700 60%, #fffbe6 100%);
  color: #23264a;
  font-weight: bold;
  font-size: 1.15em;
  padding: 13px 32px;
  border: none;
  border-radius: 12px;
  margin: 10px 10px 0 0;
  text-decoration: none;
  box-shadow: 0 4px 18px #0006;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}
.main-btn:hover, .main-btn:focus {
  background: linear-gradient(90deg, #fffbe6 60%, #ffd700 100%);
  color: #181c2b;
  box-shadow: 0 6px 24px #ffd70055;
}

.section {
  margin-bottom: 36px;
  background: rgba(35,38,74,0.85);
  border-radius: 12px;
  padding: 24px 24px 18px 24px;
  box-shadow: 0 2px 12px #0003;
}

h2 {
  color: #ffd700;
  font-family: 'Orbitron', Arial, sans-serif;
  font-size: 1.5em;
  margin-top: 0;
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.features {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 8px;
}
.feature {
  flex: 1 1 220px;
  background: #23264a;
  border-radius: 10px;
  padding: 16px 14px;
  margin-bottom: 0;
  color: #fffbe6;
  font-size: 1em;
  box-shadow: 0 2px 8px #0002;
}

.gold {
  color: #ffd700;
}

.mod-link {
  color: #ffd700;
  text-decoration: underline;
  transition: color 0.2s;
}
.mod-link:hover {
  color: #fffbe6;
}

.code-block {
  background: #181c2b;
  color: #ffd700;
  font-family: 'Fira Mono', 'Consolas', monospace;
  padding: 7px 14px;
  border-radius: 7px;
  margin: 7px 0;
  display: inline-block;
  font-size: 1em;
  box-shadow: 0 1px 4px #0003;
}

.mod-tip {
  background: #23264a;
  color: #fffbe6;
  border-left: 5px solid #ffd700;
  padding: 12px 18px;
  border-radius: 8px;
  margin: 16px 0 12px 0;
  font-size: 1em;
}

footer {
  text-align: center;
  color: #ffd700;
  background: transparent;
  padding: 18px 0 12px 0;
  font-size: 1em;
  letter-spacing: 1px;
}

/* Модальное окно демо */
#demo-modal {
  display: none;
  position: fixed;
  left: 0; top: 0;
  width: 100vw; height: 100vh;
  background: #10121ee0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
}
#demo-modal[style*="display: flex"] {
  display: flex !important;
}
#demo-modal .main-btn {
  margin: 0;
}
#demo-modal canvas {
  background: #181c2b;
  box-shadow: 0 8px 40px #000a;
  border-radius: 18px;
  border: 3px solid #23264a;
  display: block;
}
#close-demo-btn {
  position: absolute;
  right: -16px;
  top: -16px;
  background: #23264a;
  color: #ffd700;
  border: none;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  font-size: 28px;
  cursor: pointer;
  z-index: 10;
  transition: background 0.2s, color 0.2s;
}
#close-demo-btn:hover {
  background: #ffd700;
  color: #23264a;
}

@media (max-width: 1100px) {
  main { max-width: 98vw; padding: 12px 2vw 12px 2vw; }
  .features { flex-direction: column; }
}
@media (max-width: 1050px) {
  #demo-modal canvas { width: 95vw !important; height: auto !important; max-width: 1000px; }
}
@media (max-width: 700px) {
  main { padding: 6px 0 6px 0; }
  .section { padding: 12px 8px 10px 8px; }
  .feature { font-size: 0.98em; }
  #demo-modal canvas { width: 98vw !important; height: auto !important; }
  .main-btn { font-size: 1em; padding: 10px 12px; }
}