body {
  font-family: "JetBrains Mono", monospace;
  margin: 0;
  background: #0d0d0d;
  color: #f0f0f0;
}

header {
  display: flex;
  align-items: center;
  padding: 1em 2em;
  background-color: #1a1a1a;
}

.logo {
  width: 48px;
  height: 48px;
  margin-right: 1em;
  border-radius: 8px;
}

h1 {
  color: #ff2d2d;
  font-size: 1.5em;
  margin: 0;
}

.container {
  max-width: 960px;
  margin: 2em auto;
  background: #1e1e1e;
  padding: 2em;
  border-radius: 10px;
  box-shadow: 0 0 12px rgba(255, 0, 0, 0.2);
}

h2 {
  color: #ff4444;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1em;
}

th, td {
  border: 1px solid #444;
  padding: 8px;
  text-align: center;
}

input[type='number'] {
  width: 60px;
  padding: 4px;
  border: 1px solid #888;
  border-radius: 6px;
  background: #2c2c2c;
  color: #fff;
}

input[type='checkbox'] {
  transform: scale(1.2);
  margin-right: 5px;
}

small {
  display: block;
  font-size: 0.75em;
  color: #aaa;
}

#total-output {
  margin-top: 1em;
  background: #111;
  padding: 1em;
  border-radius: 8px;
  border: 1px solid #333;
}