:root {
  --bg: #f4f1ea; --card: #fffdf8; --ink: #1d1b16; --muted: #6b665a; --line: #d9d3c4;
  --accent: #1f3a5f; --accent-ink: #fff; --ok: #1d6b3a; --bad: #a3282a; --sel: #e8eef7;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --card: #1c1f25; --ink: #ece8dc; --muted: #9a9585; --line: #31353d;
    --accent: #7fa6dc; --accent-ink: #0f1a2a; --ok: #5fc287; --bad: #ee7a7c; --sel: #243247;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 system-ui, "Segoe UI", sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 24px 16px 64px; }
header h1 { font: 700 1.6rem/1.2 Georgia, "Times New Roman", serif; margin: 8px 0 2px; }
header p { margin: 0 0 20px; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; margin-bottom: 16px; }
.roles { display: grid; gap: 12px; }
.role { text-align: left; cursor: pointer; border: 2px solid var(--line); background: var(--card); color: inherit;
  border-radius: 10px; padding: 14px 16px; font: inherit; }
.role:hover { border-color: var(--accent); }
.role.on { border-color: var(--accent); background: var(--sel); }
.role b { display: block; font-size: 1.1rem; }
.role small { color: var(--muted); display: block; margin-top: 2px; }
label { display: block; font-weight: 600; margin: 16px 0 6px; }
input[type=text], input[type=password] { width: 100%; padding: 10px 12px; font: inherit; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px; }
button.primary { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px;
  padding: 11px 20px; font: inherit; font-weight: 600; cursor: pointer; }
button.primary:disabled { opacity: .45; cursor: not-allowed; }
button.ghost { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 8px;
  padding: 9px 16px; font: inherit; cursor: pointer; }
.row { display: flex; gap: 10px; align-items: center; justify-content: space-between; margin-top: 20px; flex-wrap: wrap; }
.msg { margin-top: 14px; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line); }
.msg.bad { border-color: var(--bad); color: var(--bad); }
.hint { color: var(--muted); font-size: .9rem; margin-top: 8px; }
.bar { display: flex; justify-content: space-between; color: var(--muted); font-size: .9rem; margin-bottom: 10px; }
.progress { height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; margin-bottom: 18px; }
.progress i { display: block; height: 100%; background: var(--accent); }
.q { font-size: 1.1rem; font-weight: 600; margin: 0 0 14px; }
.opt { display: block; width: 100%; text-align: left; cursor: pointer; margin: 8px 0; padding: 11px 14px;
  border: 2px solid var(--line); border-radius: 8px; background: var(--bg); color: inherit; font: inherit; }
.opt:hover { border-color: var(--accent); }
.opt.on { border-color: var(--accent); background: var(--sel); }
.code { font: 700 1.6rem/1.3 ui-monospace, Consolas, monospace; letter-spacing: .04em; text-align: center;
  padding: 16px; margin: 14px 0; border: 2px dashed var(--ok); border-radius: 10px; color: var(--ok); user-select: all; }
.ok { color: var(--ok); } .bad { color: var(--bad); }
ul.wrong { padding-left: 20px; } ul.wrong li { margin-bottom: 10px; }
ul.wrong small { color: var(--muted); display: block; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
td button { font-size: .8rem; padding: 3px 8px; }
.hidden { display: none; }