:root {
  --ground: #e8ecf1;
  --paper: #f8fafc;
  --ink: #0f1b2d;
  --ink-soft: #46556b;
  --line: #c6cfdb;
  --stamp: #c4342b;
  --ok: #1b7a52;
  --warn: #a96a05;
  --accent: #123a8f;
  --accent-ink: #ffffff;
  --high: #c4342b;
  --medium: #a96a05;
  --low: #46556b;
  --info: #46556b;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #0b1320;
    --paper: #131f33;
    --ink: #e8eef7;
    --ink-soft: #9fb0c6;
    --line: #26364e;
    --stamp: #ff6b5e;
    --ok: #4fd49a;
    --warn: #f0b84a;
    --accent: #7fa6ff;
    --accent-ink: #0b1320;
    --high: #ff6b5e;
    --medium: #f0b84a;
    --low: #9fb0c6;
    --info: #9fb0c6;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 17px/1.55 var(--sans);
  padding: 0 16px;
}
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--ground); padding: 8px 12px; border-radius: 6px; z-index: 10; }
.skip:focus { left: 8px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.top, main, footer { max-width: 760px; margin: 0 auto; }
.top { display: flex; align-items: center; gap: 10px; padding: 20px 0 0; }
.mark { width: 22px; height: 22px; border-radius: 5px; background: var(--ink); position: relative; flex: none; }
.mark::after { content: ""; position: absolute; inset: 5px 5px 4px; border: 2px solid var(--ground); border-radius: 2px 2px 8px 8px; }
.brand { font-weight: 650; letter-spacing: .01em; font-size: 15px; }

.hero { padding: 52px 0 28px; }
h1 {
  font-size: clamp(2rem, 6.4vw, 3.25rem);
  line-height: 1.04;
  letter-spacing: -.028em;
  font-weight: 800;
  margin: 0 0 18px;
  text-wrap: balance;
}
.lede { margin: 0 0 28px; color: var(--ink-soft); font-size: 1.12rem; max-width: 60ch; }

.scan label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.scan-row { display: flex; gap: 10px; }
input[type="text"], input[type="email"] {
  flex: 1; min-width: 0;
  font: 500 1.1rem var(--mono);
  padding: 15px 16px;
  background: var(--paper);
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: 10px;
}
input::placeholder { color: var(--ink-soft); opacity: .7; }
button, .btn {
  font: 700 1rem var(--sans);
  padding: 15px 22px;
  background: var(--accent);
  color: var(--accent-ink);
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  white-space: nowrap;
}
button:hover, .btn:hover { filter: brightness(1.08); }
button[disabled] { opacity: .6; cursor: progress; }
.btn.ghost { background: transparent; color: var(--ink); border: 2px solid var(--line); }
.hint { margin: 10px 0 0; font-size: 14px; color: var(--ink-soft); max-width: 62ch; }
.status { min-height: 1.6em; margin: 14px 0 0; font-size: 15px; color: var(--ink-soft); }
.status.error { color: var(--high); font-weight: 600; }

/* ---- resultado ---- */
.result { padding: 8px 0 20px; }
.msg {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 18px 20px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 0 var(--line);
}
.msg-cap { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-soft); margin: 0 0 12px; }
.hdr { font-family: var(--mono); font-size: 14.5px; margin: 0; display: grid; grid-template-columns: 7.5ch 1fr; gap: 4px 12px; }
.hdr dt { color: var(--ink-soft); }
.hdr dd { margin: 0; overflow-wrap: anywhere; }
.hdr .forged { color: var(--stamp); }
.hdr .bad { color: var(--high); font-weight: 700; }
.hdr .good { color: var(--ok); font-weight: 700; }
.hdr .unk { color: var(--ink-soft); }
.rule { border: 0; border-top: 1px dashed var(--line); margin: 16px 0; }
.verdict { display: flex; gap: 18px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.verdict-text { margin: 0; font-size: 1.25rem; line-height: 1.25; font-weight: 750; letter-spacing: -.01em; flex: 1 1 260px; }
.stamp {
  font: 800 1.35rem var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--stamp);
  border: 4px double var(--stamp);
  border-radius: 6px;
  padding: 6px 14px;
  transform: rotate(-4deg);
  flex: none;
}
.stamp.ok { color: var(--ok); border-color: var(--ok); }
.stamp.unk { color: var(--ink-soft); border-color: var(--ink-soft); }
@media (prefers-reduced-motion: no-preference) {
  .stamp { animation: slam .45s cubic-bezier(.2, 1.4, .4, 1) both .15s; }
  @keyframes slam { from { opacity: 0; transform: rotate(-4deg) scale(1.7); } to { opacity: 1; transform: rotate(-4deg) scale(1); } }
}
.grade-line { margin: 14px 0 0; font-size: 14px; color: var(--ink-soft); }
.grade-line b { color: var(--ink); }

.result h2 { font-size: 1.15rem; margin: 30px 0 10px; letter-spacing: -.01em; }
.findings { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
details { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; }
summary { cursor: pointer; padding: 13px 14px; display: flex; gap: 10px; align-items: baseline; list-style: none; font-weight: 650; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; margin-left: auto; color: var(--ink-soft); font-weight: 400; font-size: 1.3rem; line-height: 1; }
details[open] summary::after { content: "–"; }
.sev { font: 700 11px var(--mono); text-transform: uppercase; letter-spacing: .06em; padding: 3px 7px; border-radius: 4px; border: 1.5px solid currentColor; flex: none; }
.sev.high { color: var(--high); } .sev.medium { color: var(--medium); } .sev.low { color: var(--low); } .sev.info { color: var(--info); }
.fbody { padding: 0 14px 15px; }
.fbody p { margin: 0 0 10px; color: var(--ink-soft); }
.fbody .fix-label { font-size: 12px; text-transform: uppercase; letter-spacing: .07em; color: var(--ink-soft); margin: 4px 0 4px; }
.fbody code { display: block; font: 14px/1.5 var(--mono); background: var(--ground); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; color: var(--ink); overflow-wrap: anywhere; white-space: pre-wrap; }
.passed { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.passed li { padding-left: 26px; position: relative; }
.passed li::before { content: "✓"; position: absolute; left: 4px; color: var(--ok); font-weight: 800; }
.note { color: var(--ink-soft); font-size: 15px; margin-top: 14px; }

.cta { margin-top: 32px; background: var(--ink); color: var(--ground); border-radius: 14px; padding: 24px 20px; }
.cta h2 { margin: 0 0 6px; color: var(--ground); font-size: 1.4rem; }
.cta p { margin: 0 0 16px; opacity: .88; }
.cta .btn { background: var(--ground); color: var(--ink); }
.cta .fix-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.cta .small { font-size: 14px; opacity: .8; margin: 0; }
.lead { display: grid; gap: 10px; border-top: 1px solid rgba(255,255,255,.22); padding-top: 18px; }
.lead legend, .lead label { font-size: 14px; font-weight: 600; }
.lead fieldset { border: 0; padding: 0; margin: 0; display: grid; gap: 6px; }
.lead .opt { display: flex; gap: 8px; align-items: center; font-weight: 500; }
.lead input[type="radio"] { accent-color: var(--ground); width: 18px; height: 18px; }
.lead .row { display: flex; gap: 10px; }
.lead input[type="email"] { background: var(--ground); color: var(--ink); border-color: transparent; font-family: var(--sans); font-size: 1rem; }
.lead button { background: var(--stamp); color: #fff; }
.lead .msg-out { min-height: 1.4em; margin: 0; font-size: 15px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.how { padding: 40px 0 28px; border-top: 1px solid var(--line); margin-top: 28px; }
.how h2 { font-size: 1.15rem; margin: 0 0 14px; }
.how-grid { display: grid; gap: 22px; }
@media (min-width: 640px) { .how-grid { grid-template-columns: 1fr 1fr; } }
.how h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .09em; color: var(--ink-soft); margin: 0 0 8px; }
.how ul { margin: 0; padding-left: 20px; display: grid; gap: 6px; }

footer { padding: 18px 0 44px; font-size: 14px; color: var(--ink-soft); border-top: 1px solid var(--line); }
footer p { margin: 0 0 6px; }
footer a { color: var(--accent); }

@media (max-width: 520px) {
  .scan-row, .lead .row { flex-direction: column; }
  button, .btn { width: 100%; }
  .hero { padding-top: 36px; }
}