:root {
  --bg: #f5f6f8; --surface: #ffffff; --ink: #141a26; --muted: #5a6475; --line: #d7dce5;
  --accent: #1d4fd8; --good: #17803d; --good-bg: #e2f4e8; --warn: #9a6200; --warn-bg: #fbf0d9; --bad: #b4232c; --bad-bg: #fbe4e5;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f131b; --surface: #161c27; --ink: #e7ebf2; --muted: #9aa4b5; --line: #2c3545;
    --accent: #7ea2ff; --good: #5fd18a; --good-bg: #163223; --warn: #f0bd5a; --warn-bg: #3a2d12; --bad: #ff7b82; --bad-bg: #3c1a1d;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 "Segoe UI", system-ui, sans-serif; padding-inline: 16px; }
main { max-width: 900px; margin: 0 auto; padding-block: 40px 64px; display: grid; gap: 36px; }
h1 { font-size: 2rem; margin: 4px 0 8px; }
h2 { font-size: 1.3rem; margin: 0 0 6px; }
.eyebrow { margin: 0; font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.lede { color: var(--muted); max-width: 65ch; margin: 0; }
.muted { color: var(--muted); }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 20px; display: grid; gap: 14px; }
.row { display: grid; gap: 6px; }
input { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); max-width: 360px; }
button { font: inherit; font-weight: 600; justify-self: start; padding: 10px 18px; border: 0; border-radius: 6px; background: var(--accent); color: var(--surface); cursor: pointer; }
button:disabled { opacity: .5; cursor: wait; }
button:focus-visible, input:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.status { margin: 0; min-height: 1.5em; color: var(--muted); }
.verdict { padding: 12px 14px; border-radius: 6px; font-weight: 600; }
.steps { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.steps li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 16px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.steps li.ok > span:first-child { color: var(--good); }
.steps li.fail > span:first-child { color: var(--bad); font-weight: 600; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
table { border-collapse: collapse; width: 100%; min-width: 720px; font-size: .9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { font-size: .72rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.v-good { color: var(--good); } .v-warn { color: var(--warn); } .v-bad, .v-error { color: var(--bad); }
.verdict.v-good { background: var(--good-bg); } .verdict.v-warn { background: var(--warn-bg); } .verdict.v-bad, .verdict.v-error { background: var(--bad-bg); }
.howto { display: grid; gap: 8px; padding-left: 1.3em; }
code { font-family: Consolas, ui-monospace, monospace; font-size: .9em; }
a { color: var(--accent); }
pre { margin: 0; overflow-x: auto; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); }
.panel h2 { margin: 0; }