:root {
  --primary-green: #00dd00;
  --glow-green: #33ff33;
  --dark-green: #003300;
  --danger-red: #ff0000;
  --background: #000000;
}

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

html,
body {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  font-family: "VT323", monospace;
  background: var(--background);
  color: var(--primary-green);
}

#matrix-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.scanlines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    rgba(255, 255, 255, 0.03) 0px,
    rgba(255, 255, 255, 0.03) 1px,
    transparent 1px,
    transparent 2px
  );
}

.geometric-shapes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.content {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1rem;
  min-height: 100vh;
}

.main-header {
  text-align: center;
  margin-bottom: 2rem;
  margin-top: 2rem;
}

.welcome-text {
  font-size: clamp(2.5rem, 12vw, 8rem);
  color: var(--primary-green);
  text-shadow: 0 0 10px var(--glow-green), 0 0 20px var(--glow-green), 0 0 40px var(--glow-green);
  letter-spacing: 0.2em;
  animation: flicker 3s infinite;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: clamp(1rem, 3vw, 1.5rem);
  color: var(--primary-green);
  text-shadow: 0 0 10px var(--glow-green);
  opacity: 0.8;
  margin-bottom: 1rem;
}

@keyframes flicker {
  0%,
  19%,
  21%,
  23%,
  25%,
  54%,
  56%,
  100% {
    opacity: 1;
    text-shadow: 0 0 10px var(--glow-green), 0 0 20px var(--glow-green), 0 0 40px var(--glow-green);
  }
  20%,
  24%,
  55% {
    opacity: 0.8;
    text-shadow: none;
  }
}

.quote {
  font-size: clamp(0.9rem, 2.5vw, 1.2rem);
  color: var(--primary-green);
  text-shadow: 0 0 10px var(--glow-green);
  margin-top: 1rem;
  opacity: 0.9;
  min-height: 1.5em;
}

.quote::after {
  content: "_";
  animation: blink 1s infinite;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.button-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  width: 100%;
  max-width: 600px;
  margin: 2rem 0;
}

.matrix-btn {
  font-family: "VT323", monospace;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  background: transparent;
  border: 2px solid var(--primary-green);
  color: var(--primary-green);
  padding: 1rem 2rem;
  cursor: pointer;
  text-shadow: 0 0 10px var(--glow-green);
  box-shadow: 0 0 10px var(--dark-green), inset 0 0 10px var(--dark-green);
  transition: all 0.3s ease;
  text-decoration: none;
  display: block;
  text-align: center;
}

.matrix-btn:hover {
  background: var(--dark-green);
  box-shadow: 0 0 20px var(--glow-green), inset 0 0 20px var(--dark-green);
  text-shadow: 0 0 20px var(--glow-green);
  transform: translateX(5px);
}

.matrix-btn.danger {
  border-color: var(--danger-red);
  color: var(--danger-red);
  text-shadow: 0 0 10px var(--danger-red);
  box-shadow: 0 0 10px rgba(255, 0, 0, 0.3), inset 0 0 10px rgba(255, 0, 0, 0.2);
  background: rgba(51, 0, 0, 0.2);
}

.matrix-btn.danger:hover {
  background: rgba(51, 0, 0, 0.5);
  box-shadow: 0 0 20px var(--danger-red), inset 0 0 20px rgba(255, 0, 0, 0.3);
  text-shadow: 0 0 20px var(--danger-red);
}

.features-section {
  margin: 3rem 0;
  width: 100%;
  max-width: 700px;
}

.features-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  color: var(--primary-green);
  text-shadow: 0 0 10px var(--glow-green);
  margin-bottom: 2rem;
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  padding: 0 1rem;
}

.feature-card {
  border: 2px solid var(--primary-green);
  padding: 2rem 1.5rem;
  text-align: center;
  background: rgba(0, 51, 0, 0.1);
  box-shadow: 0 0 10px var(--dark-green), inset 0 0 20px rgba(0, 51, 0, 0.2);
  transition: all 0.3s ease;
}

.feature-card:hover {
  background: rgba(0, 51, 0, 0.3);
  box-shadow: 0 0 20px var(--glow-green), inset 0 0 30px rgba(0, 51, 0, 0.3);
  transform: translateY(-5px);
}

.feature-icon {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--primary-green);
  text-shadow: 0 0 10px var(--glow-green);
  margin-bottom: 1rem;
  font-weight: bold;
}

.feature-text {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--primary-green);
  text-shadow: 0 0 5px var(--glow-green);
  line-height: 1.4;
}

.secret-btn {
  font-family: "VT323", monospace;
  font-size: 2rem;
  background: transparent;
  border: 2px solid var(--danger-red);
  color: var(--danger-red);
  padding: 0.5rem 2rem;
  cursor: pointer;
  text-shadow: 0 0 10px var(--danger-red);
  box-shadow: 0 0 10px rgba(255, 0, 0, 0.3);
  margin: 2rem 0;
  transition: all 0.3s ease;
}

.secret-btn:hover {
  background: rgba(51, 0, 0, 0.5);
  box-shadow: 0 0 20px var(--danger-red);
  text-shadow: 0 0 20px var(--danger-red);
}

.footer {
  position: relative;
  width: 100%;
  text-align: center;
  padding: 2rem 1rem;
  font-size: clamp(0.8rem, 2vw, 1rem);
  color: var(--primary-green);
  opacity: 0.7;
  text-shadow: 0 0 5px var(--glow-green);
  z-index: 10;
  margin-top: auto;
}

.version {
  margin-top: 0.5rem;
  font-size: clamp(0.7rem, 1.8vw, 0.9rem);
  opacity: 0.6;
}

@media (max-width: 768px) {
  .content {
    padding: 1rem 0.5rem;
  }

  .button-grid {
    max-width: 100%;
    padding: 0 1rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .main-header {
    margin-top: 1rem;
  }
}

@media (max-width: 480px) {
  .matrix-btn {
    font-size: 1.1rem;
    padding: 0.8rem 1.5rem;
  }

  .feature-card {
    padding: 1.5rem 1rem;
  }
}