:root { color-scheme: dark; --bg: #0b1426; --panel: #111d33; --border: #22355a;
  --text: #e8e6df; --muted: #a3a8b8; --accent: #38d6f5; --accent-strong: #1e7bff;
  --danger: #ef6b62; --focus: #ffd75e;
  --mono: ui-monospace, "Cascadia Mono", Consolas, Menlo, monospace; }
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text);
  font-family: system-ui, "Segoe UI", Roboto, sans-serif; }
body { display: grid; place-items: center; min-height: 100vh; padding: 16px;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 32px 32px; background-position: center; }
main { width: 100%; max-width: 400px; background: var(--panel); border: 3px solid var(--border);
  box-shadow: 6px 6px 0 #060c18; padding: 28px 24px 24px; }
.brand { display: flex; flex-direction: column; align-items: center; gap: 10px;
  text-align: center; margin-bottom: 22px; }
.mark { image-rendering: pixelated; }
.name { font-family: var(--mono); font-weight: 700; font-size: 1.3rem; color: var(--accent);
  letter-spacing: 0.04em; }
h1 { margin: 0; font-family: var(--mono); font-size: 1rem; font-weight: 600;
  color: var(--muted); text-transform: uppercase; letter-spacing: 0.12em; }
label { display: block; font-size: 0.9rem; color: var(--muted); margin: 14px 0 6px; }
input { width: 100%; padding: 10px 12px; font: inherit; color: var(--text); background: #0b1426;
  border: 2px solid var(--border); }
input:focus { outline: 3px solid var(--focus); outline-offset: 1px; border-color: var(--accent); }
button { width: 100%; margin-top: 22px; padding: 11px; font: inherit; font-family: var(--mono);
  font-weight: 700; font-size: 1rem; color: #fff; background: var(--accent-strong);
  border: 2px solid var(--accent); cursor: pointer; text-transform: uppercase; }
button:hover { filter: brightness(1.1); }
button:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.error { margin: 0 0 6px; padding: 10px 12px; border: 2px solid var(--danger);
  color: var(--danger); font-size: 0.92rem; }
.notice { margin: 0 0 6px; padding: 10px 12px; border: 2px dashed var(--border);
  color: var(--muted); font-size: 0.92rem; }
footer { margin-top: 18px; text-align: center; color: var(--muted); font-size: 0.75rem; }