:root {
  --bg: #10140f;
  --ink: #f3f6ef;
  --muted: #b7c2ad;
  --line: #2a3324;
  --accent: #d6ff4a;
  --card: #171d15;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.6 "Segoe UI", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { color: var(--accent); text-decoration: none; }
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.1rem 6vw;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(16,20,15,.92);
  backdrop-filter: blur(8px);
}
.mark { color: var(--ink); font-weight: 700; letter-spacing: .08em; font-size: 1.15rem; }
.nav nav { display: flex; gap: 1.2rem; }
.nav nav a { color: var(--muted); }
.wrap { max-width: 760px; margin: 0 auto; padding: 4rem 1.25rem 5rem; }
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); line-height: 1.05; margin: 0 0 .6rem; letter-spacing: -.03em; }
.lede { color: var(--muted); font-size: 1.15rem; max-width: 38rem; }
.row { display: flex; gap: .8rem; flex-wrap: wrap; margin-top: 1.6rem; }
button, .btn {
  background: var(--accent);
  color: #142000;
  border: 0;
  border-radius: 999px;
  padding: .7rem 1.15rem;
  font-weight: 650;
  cursor: pointer;
}
button.ghost, .btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.grid { display: grid; gap: .8rem; margin-top: 2.4rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem 1.1rem;
}
.card strong { display: block; margin-bottom: .2rem; }
.card p { margin: 0; color: var(--muted); }
label { display: block; margin: .8rem 0 .25rem; color: var(--muted); font-size: .9rem; }
input, select {
  width: 100%;
  background: #0d120c;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .7rem .8rem;
}
.err { color: #ffb4a8; }
.ok { color: var(--accent); }
code, .mono { font-family: ui-monospace, Consolas, monospace; color: #f2e7a4; }
.keyline { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: .55rem 0; border-bottom: 1px solid var(--line); }
small { color: var(--muted); }