:root {
  --bg-dark: #0d1117;
  --card-bg: #161b22;
  --accent: #79c0ff;
  --text: #c9d1d9;
  --text-secondary: #8b949e;
  --success: #3fb950;
  --danger: #f85149;
  --warning: #d29922;
  --info: #79c0ff;
  --terminal-bg: #0a0d12;
  --terminal-header: #21262d;
  --prompt: #FFA500;
  --code-bg: #161b22;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text);
  font-family: 'Consolas', 'Courier New', monospace;
  line-height: 1.6;
  padding: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

header {
  text-align: center;
  padding: 30px 0;
  border-bottom: 1px solid #333;
  margin-bottom: 30px;
}

h1 {
  color: var(--accent);
  font-size: 2.5rem;
  margin-bottom: 10px;
}

nav {
  margin: 20px 0;
}

nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  gap: 20px;
}

nav a {
  color: var(--info);
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 4px;
  transition: all 0.3s;
}

nav a:hover {
  background-color: rgba(64, 196, 255, 0.2);
}

/* Terminal Styles */
.terminal-container {
  background-color: var(--terminal-bg);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 40px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.terminal-header {
  background-color: var(--terminal-header);
  padding: 10px 15px;
  display: flex;
  align-items: center;
}

.terminal-buttons {
  display: flex;
  gap: 8px;
  margin-right: 10px;
}

.terminal-button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.button-close { background-color: var(--danger); }
.button-min { background-color: var(--warning); }
.button-max { background-color: var(--success); }

.terminal-title {
  flex-grow: 1;
  text-align: center;
}

.terminal-body {
  padding: 20px;
  font-family: 'Courier New', monospace;
  min-height: 200px;
}

.terminal-line {
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
}

.prompt {
  color: var(--prompt);
  margin-right: 10px;
  user-select: none;
}

/* Writeup Cards */
.writeups-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 35px;
  margin-top: 30px;
}

.writeup-card {
  background-color: var(--card-bg);
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid #333;
  position: relative;
  overflow: hidden;
  margin-bottom: 40px;
}

.writeup-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
  border-color: var(--accent);
}

.writeup-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background-color: var(--accent);
}

.writeup-card h3 {
  color: var(--info);
  margin-bottom: 15px;
  font-size: 1.4rem;
}

.writeup-meta {
  display: flex;
  gap: 15px;
  margin-bottom: 15px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.difficulty {
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: bold;
}

.difficulty.medium {
  background-color: rgba(255, 215, 64, 0.2);
  color: var(--warning);
}

.difficulty.easy {
  background-color: rgba(57, 191, 80, 0.2); /* Green with 20% opacity */
  color: var(--success); /* Bright green text */
}

.writeup-card p {
  margin-bottom: 15px;
  font-size: 0.95rem;
}

/* ===== Code/Command Blocks ===== */
pre, code {
  font-family: 'Courier New', monospace;
  margin: 15px 0;
}

/* Shared dark background for BOTH commands and output */
pre.command, pre {
  background-color: var(--terminal-bg); /* Dark blue (#0a0d12) */
  color: var(--text); /* Light gray text */
  border-radius: 6px;
  padding: 15px 15px 15px 40px;
  overflow-x: auto;
  position: relative;
  line-height: 1.5;
  tab-size: 4;
}

/* Command blocks (orange $ + green border) */
pre.command {
  border-left: 3px solid var(--success); /* Green border */
}

pre.command::before {
  content: '$';
  color: #FFA500; /* Orange prompt */
  left: 20px;
  font-weight: bold;
  font-size: 15px;
  position: absolute;
}

/* Output blocks (blue ⌘ + blue border) */
pre {
  border-left: 3px solid var(--accent); /* Blue border */
}

pre::before {
  content: '⌘';
  color: var(--accent); /* Blue symbol */
  left: 15px;
  font-size: 14px;
  font-family: sans-serif;
  position: absolute;
}

/* Inline code */
code {
  background-color: var(--code-bg);
  color: var(--text);
  padding: 3px 6px;
  border-radius: 3px;
  font-size: 0.9em;
  border: 1px solid #2a2f36;
}

p code, li code {
  word-break: break-word;
}
/* Buttons & Footer */
.btn {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--accent);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #4a8fe7;
}

footer {
  text-align: center;
  padding: 30px 0;
  margin-top: 50px;
  border-top: 1px solid #333;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Image Styling */
.image-container {
  margin: 20px 0;
  text-align: center;
}

.image-container img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid #333;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.image-container p {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 8px;
}

/* Arrow character styling */
p code {
  position: relative;
  padding-left: 15px;
}

p code::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Animations */
.blink {
  animation: blink 1s infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
  .writeups-grid {
    grid-template-columns: 1fr;
  }
  
  nav ul {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  pre, pre.command {
    padding: 12px 12px 12px 35px;
    font-size: 0.85rem;
  }
}