:root {
  --bg: #0f1221;
  --panel: #1a1f36;
  --panel2: #232a48;
  --ink: #e8ecf8;
  --muted: #9aa3c4;
  --accent: #6c8cff;
  --good: #3ad29f;
  --bad: #ff6b81;
  --line: #2c3357;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; background: var(--panel); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; font-size: 20px; color: var(--ink); text-decoration: none; letter-spacing: .3px; }
.brand span { color: var(--accent); }
.nav nav { display: flex; align-items: center; gap: 16px; }
.nav a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--ink); }
.who { color: var(--muted); font-size: 13px; }
.wrap { max-width: 860px; margin: 0 auto; padding: 28px 20px 60px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; border-top: 1px solid var(--line); }
h1 { font-size: 26px; margin: 0 0 6px; }
h2 { font-size: 18px; }
.sub { color: var(--muted); margin-top: 0; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: 20px; margin: 16px 0;
}
.grid { display: grid; gap: 14px; }
.chal { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.chal .meta { flex: 1; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 999px; background: var(--panel2); color: var(--muted); }
.badge.Medium { color: #ffd479; }
.badge.Hard { color: var(--bad); }
.locked { opacity: .55; }
.pill { font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.pill.open { background: rgba(58,210,159,.15); color: var(--good); }
.pill.lock { background: rgba(255,107,129,.12); color: var(--bad); }
.pill.done { background: rgba(108,140,255,.18); color: var(--accent); }
label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
input[type=text], input[type=email], input[type=password], input[type=url], textarea {
  width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line);
  background: #0c0f1d; color: var(--ink); font-size: 14px;
}
button, .btn {
  display: inline-block; margin-top: 14px; padding: 10px 16px; border: 0; border-radius: 8px;
  background: var(--accent); color: #0b1020; font-weight: 700; cursor: pointer; font-size: 14px;
  text-decoration: none;
}
button:hover, .btn:hover { filter: brightness(1.08); }
.inline { display: inline; margin: 0; }
button.link { background: none; color: var(--muted); padding: 0; margin: 0; font-weight: 400; }
button.link:hover { color: var(--ink); text-decoration: underline; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.flash.error, .flash.bad { background: rgba(255,107,129,.12); color: var(--bad); }
.flash.success, .flash.good { background: rgba(58,210,159,.12); color: var(--good); }
a.inlink { color: var(--accent); }
pre {
  background: #0c0f1d; border: 1px solid var(--line); border-radius: 8px; padding: 14px;
  overflow: auto; white-space: pre-wrap; word-break: break-word; font-size: 13px; color: #cdd6f4;
}
code { background: #0c0f1d; padding: 2px 6px; border-radius: 5px; font-size: 13px; }
table { width: 100%; border-collapse: collapse; }
td, th { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); font-size: 14px; }
.muted { color: var(--muted); }
.kv { font-family: ui-monospace, Menlo, monospace; font-size: 13px; }