:root {
  --ink: #0b1220; --navy: #1b2f4b; --navy-up: #27425f; --steel: #2f6690;
  --aqua: #4fd6e0; --gold: #ffb50b; --text: #eaf4ff; --mute: #a7cbe6;
  --danger: #e05263;
}
* { box-sizing: border-box; }
html { background: var(--ink); }
body {
  margin: 0; color: var(--text); background: var(--ink);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--aqua); }
header {
  background: var(--navy); border-bottom: 4px solid var(--steel);
}
header .bar {
  max-width: 760px; margin: 0 auto; padding: 12px 16px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
header .home {
  display: flex; align-items: center; gap: 10px; color: var(--text);
  text-decoration: none; font-weight: 800; letter-spacing: .02em;
}
header img { width: 36px; height: 36px; image-rendering: pixelated; }
nav { display: flex; gap: 14px; margin-left: auto; flex-wrap: wrap; }
nav a { color: var(--mute); text-decoration: none; font-size: 15px; }
nav a:hover, nav a[aria-current] { color: var(--aqua); }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 28px; line-height: 1.2; margin: 8px 0 4px; }
h2 { font-size: 20px; margin: 32px 0 8px; color: var(--gold); }
.updated { color: var(--mute); margin: 0 0 24px; }
.card {
  background: var(--navy); border: 2px solid var(--navy-up);
  border-radius: 6px; padding: 16px 18px; margin: 16px 0;
}
.hero { text-align: center; padding: 24px 0 8px; }
.hero img { width: 128px; height: 128px; image-rendering: pixelated; }
.hero p { color: var(--mute); }
label { display: block; font-weight: 600; margin: 14px 0 4px; }
input {
  width: 100%; padding: 10px 12px; font: inherit; color: var(--text);
  background: var(--ink); border: 2px solid var(--steel); border-radius: 4px;
}
input:focus { outline: none; border-color: var(--aqua); }
button {
  margin-top: 18px; padding: 10px 18px; font: inherit; font-weight: 700;
  color: var(--text); background: var(--danger); border: 0; border-radius: 4px;
  cursor: pointer;
}
button[disabled] { opacity: .5; cursor: default; }
button.plain { background: var(--steel); }
button.small { margin: 8px 8px 0 0; padding: 6px 12px; font-size: 14px; }
label.inline { display: inline-flex; gap: 8px; align-items: center; font-weight: 400; }
label.inline input { width: auto; }
.meta { color: var(--mute); font-size: 14px; }
.note { color: var(--mute); font-size: 14px; }
.message { margin-top: 16px; font-weight: 600; }
.message.bad { color: var(--danger); }
.message.good { color: var(--aqua); }
[hidden] { display: none !important; }
footer {
  max-width: 760px; margin: 0 auto; padding: 16px; color: var(--mute);
  font-size: 14px; border-top: 1px solid var(--navy-up);
}