:root {
  --bg: #f7f6f3; --surface: #ffffff; --ink: #1c1d1f; --muted: #5d6066; --line: #dedbd4;
  --accent: #23395d; --ok: #1f6b45; --ok-bg: #e7f3ec; --bad: #a3271f; --bad-bg: #fbeceb; --warn: #8a5a00; --warn-bg: #fdf3df;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141517; --surface: #1d1f22; --ink: #e9e8e4; --muted: #a2a5ab; --line: #34373c;
    --accent: #9db7e0; --ok: #7fd1a4; --ok-bg: #16281f; --bad: #f2948d; --bad-bg: #2d1817; --warn: #f0c56b; --warn-bg: #2b2414;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body { font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 40px 16px 64px; }
h1 { font: 600 2rem/1.2 ui-serif, Georgia, "Times New Roman", serif; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font: 600 1.15rem/1.3 ui-serif, Georgia, serif; margin: 32px 0 10px; }
.eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.75rem; color: var(--accent); margin: 0 0 6px; font-weight: 600; }
.lede { color: var(--muted); margin: 0 0 28px; }
.muted { color: var(--muted); }
.small { font-size: 0.85rem; }
code, .stamp { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85em; overflow-wrap: anywhere; }
.idform label { display: block; font-weight: 600; margin-bottom: 6px; }
.row { display: flex; gap: 8px; }
input, textarea { width: 100%; font: inherit; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
input:focus, textarea:focus, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.85rem; margin: 8px 0; }
button { font: inherit; font-weight: 600; color: #fff; background: var(--accent); border: 0; border-radius: 8px; padding: 10px 18px; cursor: pointer; white-space: nowrap; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) button { color: #141517; } }
#result, #email-section { margin-top: 24px; }
.banner { border-radius: 10px; padding: 14px 16px; margin: 0 0 16px; border: 1px solid transparent; }
.banner.ok { background: var(--ok-bg); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.banner.bad { background: var(--bad-bg); color: var(--bad); border-color: color-mix(in srgb, var(--bad) 30%, transparent); }
.banner.warn { background: var(--warn-bg); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
p.bad { color: var(--bad); }
.facts { display: grid; grid-template-columns: 9.5rem 1fr; gap: 6px 16px; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.checks, .extra { list-style: none; padding: 0; margin: 0; }
.checks li { padding: 8px 0; border-bottom: 1px solid var(--line); }
.checks li.ok .mark { color: var(--ok); }
.checks li.bad { color: var(--bad); }
.mark { display: inline-block; width: 1.4em; font-weight: 700; }
.detail { color: var(--muted); font-size: 0.85rem; margin-left: 1.4em; overflow-wrap: anywhere; }
.extra li { background: var(--bad-bg); color: var(--bad); border-radius: 6px; padding: 6px 10px; margin: 4px 0; }
.parts { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; font-size: 0.9rem; }
.parts th, .parts td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.parts th { color: var(--muted); font-weight: 600; }
footer { margin-top: 48px; border-top: 1px solid var(--line); padding-top: 16px; }
@media (max-width: 560px) {
  .facts { grid-template-columns: 1fr; }
  .facts dt { margin-top: 6px; }
  .row { flex-direction: column; }
  .parts th:nth-child(2), .parts td:nth-child(2) { display: none; }
}