:root {
  --color-primary: #4A4A4A;
  --color-secondary: #6B8E23;
  --color-neutral-light: #D3D3D3;
  --color-neutral-dark: #1A1A1A;
  --color-bg: #2D2D2D;
  --color-text: #E0E0E0;
  --color-link: #6B8E23;
  --color-link-hover: #8FBC8F;
  --radius-btn: 0.25rem;
  --radius-card: 0.5rem;
  --shadow-card: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
  --font-primary: 'Courier New', monospace;
  --font-secondary: 'Times New Roman', serif;
}

@keyframes flicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
    opacity: 1;
  }
  20%, 22%, 24%, 55% {
    opacity: 0.7;
  }
}

@keyframes scanline {
  0% {
    background-position: 0 -100vh;
  }
  100% {
    background-position: 0 100vh;
  }
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-primary);
  line-height: 1.6;
  background-image: 
    linear-gradient(rgba(107, 142, 35, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(107, 142, 35, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
  position: relative;
  overflow-x: hidden;
}

body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.25) 50%
  );
  background-size: 100% 4px;
  pointer-events: none;
  animation: scanline 6s linear infinite;
  z-index: 1000;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-secondary);
  font-weight: 700;
  color: var(--color-neutral-light);
  text-transform: uppercase;
  letter-spacing: 1px;
}

h1 {
  font-size: 2.5rem;
  border-bottom: 2px solid var(--color-secondary);
  padding-bottom: 0.5rem;
  display: inline-block;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color 0.3s ease;
  position: relative;
}

a:hover {
  color: var(--color-link-hover);
}

a::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 1px;
  bottom: -2px;
  left: 0;
  background-color: var(--color-link);
  transform: scaleX(0);
  transform-origin: bottom right;
  transition: transform 0.3s ease;
}

a:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  font-family: var(--font-primary);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius-btn);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-secondary);
  color: var(--color-neutral-dark);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.card {
  background-color: var(--color-neutral-dark);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.3s ease;
  border: 1px solid var(--color-primary);
}

.card:hover {
  transform: translateY(-5px);
}

.card-header {
  background-color: var(--color-primary);
  padding: 1rem;
  border-bottom: 1px solid var(--color-secondary);
}

.card-body {
  padding: 1.5rem;
}

.form-input {
  background-color: var(--color-neutral-dark);
  border: 1px solid var(--color-primary);
  color: var(--color-text);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-btn);
  font-family: var(--font-primary);
  width: 100%;
  transition: border-color 0.3s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-secondary);
}

.terminal-effect {
  position: relative;
  overflow: hidden;
}

.terminal-effect::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(107, 142, 35, 0.1),
    rgba(107, 142, 35, 0.2) 50%,
    rgba(107, 142, 35, 0.1)
  );
  z-index: -1;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
}