:root {
  --lime: #ADFF00;
  --ink: #0a0a0a;
  --muted: #6a6a6a;
  --line: #e2e2e2;
  --soft: #f7f7f7;
  --lime-soft: #f3ffd9;
  --body2: #4b5563;
  --error: #b3261e;
  --error-soft: #fdf1f0;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Montserrat', -apple-system, Arial, sans-serif;
  background: #fff;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 800px; margin: 0 auto; padding: 0 24px 80px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---- progreso sticky ---- */
.progress-bar { position: sticky; top: 0; z-index: 50; background: var(--ink); padding: 10px 20px 12px; }
.progress-inner { max-width: 760px; margin: 0 auto; }
.progress-label {
  font-family: 'Sora', sans-serif; font-weight: 700; color: #fff; font-size: 13px; letter-spacing: .02em;
  display: flex; justify-content: space-between; gap: 12px; margin-bottom: 6px; white-space: nowrap;
}
.progress-label .n { color: var(--lime); }
.progress-track { height: 6px; background: rgba(255,255,255,.22); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; width: 100%; transform: scaleX(0); transform-origin: left; background: var(--lime); border-radius: 3px; transition: transform .35s ease; }

/* ---- cabecera de marca ---- */
header { padding-top: 34px; }
.brandbar {
  display: flex; justify-content: space-between; align-items: flex-start; gap: 14px;
  padding-bottom: 14px; border-bottom: 2px solid var(--ink); position: relative;
}
.brandbar::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 90px; height: 2px; background: var(--lime); }
.logo { height: 38px; display: block; }
.tagline { font-family: 'Sora', sans-serif; font-size: 10px; color: var(--muted); letter-spacing: 2.5px; text-transform: uppercase; font-weight: 500; margin-top: 9px; }
.ref-tag {
  font-family: 'Sora', sans-serif; background: var(--ink); color: #fff; font-size: 11px; font-weight: 700;
  padding: 6px 12px; border-radius: 3px; letter-spacing: 1.5px; white-space: nowrap; margin-top: 4px;
}

/* ---- hero ---- */
.hero { margin-top: 30px; }
.kicker { margin-top: 26px; font-family: 'Sora', sans-serif; font-weight: 600; font-size: 12px; letter-spacing: 2px; text-transform: uppercase; color: var(--muted); }
.kicker b { color: var(--ink); }
h1 { font-family: 'Sora', sans-serif; font-weight: 800; font-size: clamp(28px, 6.4vw, 40px); line-height: 1.14; letter-spacing: -1px; color: var(--ink); margin: 12px 0 6px; }
h1 .accent { background: linear-gradient(transparent 62%, var(--lime) 62%, var(--lime) 96%, transparent 96%); padding: 0 4px; }
.intro { margin-top: 16px; color: var(--ink); }
.intro p { margin-bottom: 12px; max-width: 68ch; }
.intro strong { font-weight: 600; }
.req-note { font-size: 14px; color: var(--body2); }

/* ---- secciones ---- */
.section-title {
  font-family: 'Sora', sans-serif; font-weight: 700; font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--muted); margin: 38px 0 4px; padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
form { margin-top: 10px; }

/* ---- preguntas (tarjeta con borde lima a la izquierda) ---- */
fieldset.q {
  background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--lime);
  border-radius: 0 10px 10px 0; padding: 22px 20px; margin-top: 18px; scroll-margin-top: 70px; min-width: 0;
}
fieldset.q.invalid { border-color: var(--error); border-left-color: var(--error); background: var(--error-soft); }
.q-head { display: flex; gap: 13px; align-items: flex-start; }
.q-num {
  font-family: 'Sora', sans-serif; font-weight: 700; font-size: 15px; background: var(--ink); color: var(--lime);
  min-width: 34px; height: 34px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;
}
.q-title { font-family: 'Sora', sans-serif; font-weight: 700; font-size: 17px; color: var(--ink); line-height: 1.35; letter-spacing: -0.2px; }
.q-help { font-size: 14px; color: var(--body2); margin-top: 6px; }
.q-body { margin-top: 14px; }
.q-body + .q-body { margin-top: 22px; }
.opt-note { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; white-space: nowrap; }
.sub-label, .q-sub-title, .otro-label { display: block; font-family: 'Sora', sans-serif; font-weight: 600; font-size: 15px; color: var(--ink); line-height: 1.35; margin-bottom: 8px; }
.sub-label + .q-help { margin: -2px 0 8px; }

input[type="text"], textarea {
  width: 100%; font-family: 'Montserrat', sans-serif; font-size: 16px;
  padding: 13px 14px; border: 1.5px solid var(--line); border-radius: 6px;
  background: #fff; color: var(--ink); outline: none; transition: border-color .15s, box-shadow .15s;
}
input[type="text"]:focus, textarea:focus { border-color: var(--ink); box-shadow: 0 0 0 3px rgba(173,255,0,.45); }
input[type="radio"]:focus-visible, input[type="checkbox"]:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
textarea { min-height: 72px; resize: vertical; }
[aria-invalid="true"] { border-color: var(--error); }

.choices { display: flex; flex-direction: column; gap: 9px; }
@media (min-width: 600px) {
  .choices-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
  .choices-2col .otro-input { grid-column: 1 / -1; }
}
.choice {
  display: flex; align-items: flex-start; gap: 12px; border: 1.5px solid var(--line); border-radius: 7px;
  padding: 13px 14px; cursor: pointer; background: #fff; transition: border-color .15s, background .15s; font-size: 15px;
}
.choice:hover { border-color: #bdbdbd; }
.choice input { margin-top: 3px; accent-color: var(--ink); width: 18px; height: 18px; flex-shrink: 0; cursor: pointer; }
.choice.checked { border-color: var(--ink); background: var(--lime-soft); }
.choice.disabled { opacity: .45; cursor: not-allowed; }
.choice.disabled input { cursor: not-allowed; }
.otro-input { margin-top: 2px; padding: 12px 14px; background: var(--soft); border: 1px solid var(--line); border-radius: 7px; }
.otro-input[hidden] { display: none; }
.otro-input.invalid { border-color: var(--error); background: var(--error-soft); }
.counter { font-size: 13px; font-weight: 600; color: var(--muted); margin-top: 10px; }
.counter.at-max { color: var(--ink); }

.sub-block { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); }
.files-block { margin-top: 18px; }
.files-block.invalid { padding: 12px; border: 1.5px solid var(--error); border-radius: 7px; background: var(--error-soft); }
input[type="file"] { display: block; width: 100%; font-family: 'Montserrat', sans-serif; font-size: 14px; padding: 12px; border: 1.5px dashed #bdbdbd; border-radius: 6px; background: var(--soft); cursor: pointer; }
input[type="file"]:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
.file-list { list-style: none; margin: 10px 0 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.file-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.file-list .file-name { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.file-list .file-size { color: var(--muted); font-size: 13px; white-space: nowrap; }
.file-list button { font: inherit; font-size: 13px; font-weight: 600; background: none; border: 1px solid var(--line); border-radius: 5px; padding: 4px 9px; cursor: pointer; color: var(--ink); }
.file-list button:hover { border-color: var(--ink); }
.sub-block[hidden], fieldset.q[hidden] { display: none; }

.err-msg { color: var(--error); font-size: 13.5px; font-weight: 600; margin-top: 10px; }
.err-msg[hidden] { display: none; }

/* ---- matriz (P7) ---- */
fieldset.matrix-row { border: none; border-top: 1px solid var(--line); padding: 14px 0 4px; margin: 0; min-width: 0; }
fieldset.matrix-row:first-of-type { border-top: none; padding-top: 0; }
fieldset.matrix-row legend { font-family: 'Sora', sans-serif; font-weight: 600; font-size: 14.5px; line-height: 1.35; padding: 0; margin-bottom: 10px; }
.matrix-options .choice { font-size: 14px; padding: 11px 12px; }
@media (min-width: 720px) {
  fieldset.matrix-row { display: grid; grid-template-columns: 1.25fr repeat(3, 1fr); column-gap: 10px; align-items: start; padding: 14px 0; }
  fieldset.matrix-row legend { grid-column: 1; margin-bottom: 0; padding: 10px 6px 0 0; }
  .matrix-options { display: contents; }
  .matrix-options .choice { height: 100%; }
  fieldset.matrix-row .err-msg { grid-column: 1 / -1; }
}

/* ---- envío ---- */
.submit-zone { margin-top: 28px; text-align: center; }
button.submit {
  font-family: 'Sora', sans-serif; font-weight: 800; font-size: 17px; width: 100%; padding: 17px; border: none; border-radius: 8px;
  background: var(--lime); color: var(--ink); cursor: pointer; letter-spacing: -0.2px; transition: transform .1s, opacity .15s;
}
button.submit:hover { transform: translateY(-1px); }
button.submit:focus-visible { outline: 3px solid var(--ink); outline-offset: 3px; }
button.submit:disabled { opacity: .55; cursor: wait; transform: none; }
.send-error { margin-top: 14px; color: var(--error); font-size: 14px; font-weight: 600; }
.send-error[hidden] { display: none; }
.status-banner { padding: 12px 14px; border-radius: 6px; font-size: 14.5px; font-weight: 600; margin: 18px 0 0; background: var(--soft); }
.status-banner[hidden] { display: none; }

/* ---- gracias ---- */
#gracias { text-align: center; padding: 70px 0 30px; }
#gracias[hidden] { display: none; }
#gracias .check {
  width: 74px; height: 74px; border-radius: 50%; background: var(--lime); color: var(--ink);
  font-size: 38px; font-weight: 800; font-family: 'Sora', sans-serif; display: flex; align-items: center; justify-content: center; margin: 0 auto 22px;
}
#gracias h2 { font-family: 'Sora', sans-serif; font-weight: 800; font-size: 30px; letter-spacing: -0.8px; color: var(--ink); margin-bottom: 10px; }
#gracias p { color: var(--body2); max-width: 420px; margin: 0 auto 8px; }
#gracias .cien { font-family: 'Sora', sans-serif; font-weight: 800; color: var(--ink); font-size: 17px; margin-top: 18px; }
#gracias .cien .n { background: linear-gradient(transparent 62%, var(--lime) 62%, var(--lime) 96%, transparent 96%); padding: 0 3px; }

/* ---- footer ---- */
footer { margin-top: 60px; text-align: center; font-family: 'Sora', sans-serif; font-size: 12px; color: var(--muted); padding-top: 12px; border-top: 1px solid var(--line); letter-spacing: 0.5px; }
footer strong { color: var(--ink); }
.footer-dot { color: var(--lime); margin: 0 6px; font-weight: 700; font-size: 15px; vertical-align: middle; }

/* honeypot */
.hp { position: absolute; left: -9999px; top: -9999px; height: 1px; width: 1px; overflow: hidden; }

@media (max-width: 420px) {
  .ref-tag { font-size: 10px; padding: 5px 9px; letter-spacing: 1px; }
  .logo { height: 32px; }
  fieldset.q { padding: 18px 14px; }
}