:root {
  color-scheme: dark;
  --bg: #0b0d12; --panel: #12151d; --line: #262b38; --text: #e7e9ef;
  --muted: #99a0b0; --accent: #8b7bff; --danger: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: var(--bg); color: var(--text); padding: 24px;
  font: 400 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}
.card {
  width: 100%; max-width: 420px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 28px;
}
.card.wide { max-width: 680px; }
.brand { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.brand svg { width: 26px; height: 26px; }
.brand b { font-size: 17px; letter-spacing: .16em; font-weight: 600; }
h1 { font-size: 19px; margin: 0 0 6px; font-weight: 600; }
p.sub { margin: 0 0 22px; color: var(--muted); font-size: 13px; }
label { display: block; font-size: 12px; color: var(--muted); margin: 0 0 6px; }
input[type=text], input[type=password] {
  width: 100%; padding: 11px 12px; margin-bottom: 16px; background: #0e1118;
  border: 1px solid var(--line); border-radius: 9px; color: var(--text); font-size: 14px;
}
input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button {
  width: 100%; padding: 12px; border: 0; border-radius: 9px; background: var(--accent);
  color: #10121a; font-weight: 600; font-size: 14px; cursor: pointer;
}
button:hover { filter: brightness(1.08); }
.err {
  background: rgba(255,107,107,.1); border: 1px solid rgba(255,107,107,.35);
  color: var(--danger); padding: 10px 12px; border-radius: 9px; margin-bottom: 16px; font-size: 13px;
}
.note { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.note a, a { color: var(--accent); }
h2 { font-size: 15px; margin: 22px 0 8px; }
ul { margin: 0 0 12px; padding-left: 20px; color: var(--muted); font-size: 13px; }
li { margin-bottom: 5px; }
code { background: #0e1118; padding: 1px 5px; border-radius: 4px; font-size: 12px; }