:root {
  --bg: #0b0f14; --card: #111820; --line: #1f2b36; --ink: #cdd8e0; --dim: #6d8090;
  --cyan: #37e0d8; --gold: #e8b923;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", "Menlo", "Consolas", monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--mono); font-size: 14px; line-height: 1.55; }
main { max-width: 760px; margin: 0 auto; padding: 48px 20px 80px; }
a { color: var(--cyan); }
code { color: var(--cyan); background: #0e141b; padding: 1px 5px; border-radius: 4px; font-size: 0.92em; }
pre { background: #0a0f15; border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; overflow-x: auto; color: var(--cyan); }
.dim { color: var(--dim); }

header { text-align: center; margin-bottom: 48px; }
h1 { font-size: 44px; letter-spacing: 3px; color: var(--cyan); margin: 0; }
.cursor { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.tag { margin-top: 10px; }

section { margin: 34px 0; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: 2px; color: var(--dim); border-bottom: 1px solid var(--line); padding-bottom: 8px; }
h3 { font-size: 13px; color: var(--cyan); margin: 0 0 6px; }

.buttons { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); background: #16212b; color: var(--ink);
  padding: 12px 18px; border-radius: 8px; text-decoration: none; font-size: 13px;
}
.btn:hover { border-color: var(--cyan); }
.btn.primary { background: #10343a; border-color: #1f6f6a; color: var(--cyan); }
.btn .sz { color: var(--dim); font-size: 11px; }
.oshint { margin-top: 12px; color: var(--gold); font-size: 12px; min-height: 16px; }

.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 18px; margin-top: 14px; }
.cols > div { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 14px; }
.cols p { margin: 6px 0; font-size: 12.5px; }

table.spec { width: 100%; border-collapse: collapse; margin-top: 12px; font-size: 12.5px; }
table.spec th, table.spec td { text-align: left; padding: 9px 0; vertical-align: top; }
table.spec th { color: var(--cyan); font-weight: normal; padding-right: 20px; white-space: nowrap; width: 1%; }
table.spec tr + tr th, table.spec tr + tr td { border-top: 1px solid var(--line); }

dl.how { margin: 0; }
dl.how dt { color: var(--cyan); font-size: 12.5px; margin-top: 20px; }
dl.how dt:first-child { margin-top: 0; }
dl.how dd { margin: 6px 0 0; font-size: 13px; }

footer { margin-top: 60px; padding-top: 18px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; font-size: 12px; }