:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #1a1a1a;
  --bg-tertiary: #2a2a2a;
  --text-primary: #ffffff;
  --text-secondary: #cccccc;
  --text-muted: #666666;
  --accent: #ff6600;
  --border: #333333;
}

* {
  box-sizing: border-box;
}

body {
  font-family: monospace;
  font-size: 1.1em;
  background: var(--bg-primary);
  color: var(--text-primary);
  margin: 0;
  padding: 2em;
  line-height: 1.4;
}

main {
  max-width: 40em;
  margin: 0 auto;
}

h1 {
  color: var(--accent);
  font-size: 2.5em;
  font-weight: bold;
  text-align: center;
  margin-bottom: 0.5em;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

header {
  background: var(--bg-secondary);
  padding: 1.5em;
  margin-bottom: 1em;
  border: 2px solid var(--border);
}

header label {
  display: flex;
  align-items: center;
  margin-bottom: 1em;
  font-weight: bold;
}

header input[type="checkbox"] {
  width: 1.5em;
  height: 1.5em;
  margin-right: 0.75em;
  accent-color: var(--accent);
}

header input[type="text"] {
  width: 100%;
  padding: 1em;
  font-size: 1em;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--border);
  outline: none;
}

header input[type="text"]:focus {
  border-color: var(--accent);
}

header input[type="text"]::placeholder {
  color: var(--text-muted);
}

section {
  background: var(--bg-secondary);
  border: 2px solid var(--border);
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

li {
  padding: 1em;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

li:last-child {
  border-bottom: none;
}

li[data-completed="true"] {
  opacity: 0.5;
  text-decoration: line-through;
}

li label {
  display: flex;
  align-items: center;
  flex: 1;
  cursor: pointer;
}

input[type="checkbox"] {
  width: 1.2em;
  height: 1.2em;
  margin-right: 0.75em;
  accent-color: var(--accent);
}

button {
  padding: 0.5em 1em;
  background: var(--accent);
  color: var(--bg-primary);
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-weight: bold;
  font-size: 0.9em;
  text-transform: uppercase;
}

button:hover {
  background: var(--text-primary);
}

footer {
  padding: 1em;
  background: var(--bg-tertiary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
}

footer p {
  margin: 0;
  color: var(--text-secondary);
}

footer strong {
  color: var(--accent);
}

p {
  padding: 2em;
  text-align: center;
  color: var(--text-muted);
  margin: 0;
  font-weight: bold;
}

/* Card component */
.card {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5em;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.card:hover {
  background: var(--bg-primary);
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(0deg) scale(1.1);
  box-shadow: 0 0 20px var(--accent), 0 0 40px var(--accent), 0 0 60px var(--accent);
  text-shadow: 0 0 10px var(--accent);
}

.card img {
  margin-bottom: 0.25em;
  object-fit: contain;
}

.card span {
  font-weight: bold;
  font-size: 0.8em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Bottom nav links */
nav a {
  transition: color 0.2s ease;
}

nav a:hover {
  color: var(--accent) !important;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
  div[style*="padding: 2em"] {
    padding: 1em !important;
  }
  
  div a {
    transform: rotate(0deg) !important;
    margin: 0.2em !important;
  }
}