* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: #0a0e12; color: #c9d1d9;
  font-family: "JetBrains Mono", "Fira Code", monospace;
  max-width: 960px; margin: 0 auto; padding: 32px 20px 80px;
  line-height: 1.6;
}
header { text-align: center; padding: 40px 0 32px; border-bottom: 1px solid #1f2733; margin-bottom: 32px; }
.badge {
  display: inline-block; background: #d29922; color: #0a0e12;
  font-weight: 800; letter-spacing: 4px; padding: 6px 18px;
  border-radius: 3px; font-size: 14px; margin-bottom: 16px;
}
h1 { font-size: 34px; color: #f0f3f6; letter-spacing: 1px; }
.tag { margin-top: 10px; font-size: 13px; color: #8b949e; }
.hard { color: #ff6b6b; font-weight: 700; letter-spacing: 2px; }
h2 {
  font-size: 15px; color: #d29922; letter-spacing: 3px;
  text-transform: uppercase; margin: 36px 0 14px;
  padding-bottom: 8px; border-bottom: 1px dashed #2b3543;
}
code {
  background: #131a22; color: #7ee787; padding: 2px 7px;
  border-radius: 3px; font-size: 13px; word-break: break-all;
}
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid #1f2733; }
th { color: #8b949e; font-weight: 600; font-size: 12px; text-transform: uppercase; }
ul { list-style: none; margin: 6px 0 14px; }
li { padding: 5px 0 5px 18px; position: relative; font-size: 14px; }
li::before { content: "▸"; position: absolute; left: 0; color: #d29922; }
.in { color: #7ee787; font-weight: 700; margin-top: 14px; letter-spacing: 2px; }
.out { color: #ff6b6b; font-weight: 700; margin-top: 20px; letter-spacing: 2px; }