:root {
  --bg: #f3f7f4;
  --panel: #ffffff;
  --ink: #163226;
  --muted: #4a5f55;
  --line: #d7e4db;
  --green: #1b7a4a;
  --green-deep: #145c38;
  --green-soft: #e8f6ee;
  --gold: #9a7b2f;
  --gold-soft: #f7efd8;
  --danger: #9b2c2c;
  --danger-soft: #fbecec;
  --font: "Source Sans 3", "Segoe UI", sans-serif;
  --display: "Source Serif 4", Georgia, serif;
  --shadow: 0 10px 28px rgba(22, 50, 38, 0.08);
}

* { box-sizing: border-box; }
html { font-size: 18px; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(27, 122, 74, 0.08), transparent 40%),
    radial-gradient(circle at top right, rgba(154, 123, 47, 0.1), transparent 35%),
    var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}
a { color: var(--green); font-weight: 700; }

.top {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.1rem 1rem 0.4rem;
}
.brand {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.brand img { width: 52px; height: 52px; object-fit: contain; }
.brand strong { display: block; font-size: 1.05rem; }
.brand small { color: var(--muted); font-weight: 600; }

.shell {
  max-width: 760px;
  margin: 0 auto;
  padding: 0.6rem 1rem 3rem;
}

.intro {
  background: linear-gradient(160deg, #ffffff 0%, #f5fbf7 100%);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 1.25rem 1.2rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}
.kicker {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  font-weight: 800;
  color: var(--gold);
  background: var(--gold-soft);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  margin-bottom: 0.55rem;
}
.intro h1, .card h2 {
  font-family: var(--display);
  margin: 0 0 0.5rem;
  line-height: 1.2;
}
.intro h1 { font-size: clamp(1.45rem, 4vw, 1.9rem); }
.intro p, .hint { color: var(--muted); margin: 0; }

.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
}
.step-dot {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.42rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
}
.step-dot.active {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.step-dot.done {
  background: var(--green-soft);
  color: var(--green-deep);
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 1.3rem 1.2rem;
  box-shadow: var(--shadow);
}
.step { display: none; }
.step.active { display: block; }

label {
  display: block;
  font-weight: 700;
  margin: 0.9rem 0 0.35rem;
}
input, select, textarea {
  width: 100%;
  margin-top: 0.35rem;
  font: inherit;
  padding: 0.8rem 0.9rem;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(27, 122, 74, 0.12);
}
textarea { resize: vertical; min-height: 110px; }

.check {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
  font-weight: 650;
  margin: 0.85rem 0;
  padding: 0.85rem 0.95rem;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  background: #fbfdfb;
  cursor: pointer;
}
.check:has(input:checked) {
  border-color: var(--green);
  background: var(--green-soft);
}
.check input {
  width: 1.2rem;
  height: 1.2rem;
  margin: 0.15rem 0 0;
  accent-color: var(--green);
}

.box {
  margin-top: 0.85rem;
  background: var(--green-soft);
  border: 1px solid #c9e6d4;
  border-radius: 14px;
  padding: 0.9rem 1rem;
}
.box.warn {
  background: var(--gold-soft);
  border-color: #ead9a8;
}
.box span { display: block; color: var(--muted); margin-top: 0.2rem; }

.file-box {
  border: 1.5px dashed #b7cdbff;
  border: 1.5px dashed #b7cdbf;
  border-radius: 14px;
  padding: 1rem;
  background: #f8fcf9;
  margin-top: 0.5rem;
}
.file-box input[type="file"] {
  border: none;
  padding: 0.35rem 0;
  background: transparent;
}

.review {
  display: grid;
  gap: 0.55rem;
}
.review-row {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 0.5rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--line);
}
.review-row:last-child { border-bottom: none; }
.review-row strong { color: var(--muted); font-weight: 700; }

.nav {
  display: flex;
  justify-content: space-between;
  gap: 0.7rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.btn {
  appearance: none;
  border: 1.5px solid transparent;
  border-radius: 999px;
  padding: 0.8rem 1.2rem;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.65; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { background: var(--green-deep); color: #fff; }
.btn-secondary { background: var(--gold-soft); color: #6d5418; border-color: #e0d0a8; }
.btn-ghost { background: #fff; border-color: var(--line); color: var(--ink); }

.alert {
  border-radius: 14px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.85rem;
  font-weight: 650;
}
.alert.error { background: var(--danger-soft); color: var(--danger); border: 1px solid #e5bcbc; }
.alert.ok { background: var(--green-soft); color: var(--green-deep); border: 1px solid #c9e6d4; }
.alert.info { background: #eef5ff; color: #1d4f7a; border: 1px solid #c9daf0; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(8, 30, 20, 0.5);
}
.modal[hidden] { display: none !important; }
.modal-card {
  width: min(520px, 100%);
  max-height: min(85vh, 640px);
  overflow: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 18px 50px rgba(15, 40, 28, 0.22);
  padding: 1.1rem 1.15rem 1.2rem;
}
.modal-head h3 {
  margin: 0 0 0.75rem;
  color: var(--green-deep);
  font-size: 1.15rem;
}
.modal-card p {
  margin: 0 0 0.75rem;
  line-height: 1.45;
  color: var(--ink);
  font-size: 0.95rem;
}

.success-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green);
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.7rem;
}

.politica-texto {
  max-height: 280px;
  overflow: auto;
  font-size: 0.98rem;
  line-height: 1.6;
}
.politica-texto p { margin: 0 0 0.75rem; color: var(--ink); }
.politica-texto ul {
  margin: 0 0 0.75rem;
  padding-left: 1.2rem;
  color: var(--ink);
}
.politica-texto li { margin-bottom: 0.35rem; }

.option-card {
  align-items: flex-start;
}
.option-title {
  display: block;
  font-size: 1.12rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 0.4rem;
  font-style: normal;
  letter-spacing: -0.01em;
}
.option-desc {
  display: block;
  font-style: normal;
  font-size: 0.98rem;
  line-height: 1.55;
  color: var(--ink);
  opacity: 0.85;
  font-weight: 500;
}
.nota-opcion {
  display: block;
  margin-top: 0.55rem;
  color: #b42318;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.45;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-style: normal;
}
.guide-block {
  margin: 0.85rem 0 1rem;
  padding-top: 0.35rem;
}
.guide-step {
  margin: 0 0 0.55rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--green-deep);
}
.box.soft {
  background: var(--green-soft);
  border-color: #c9e6d4;
}
.box.soft span {
  display: block;
  color: var(--muted);
  margin-top: 0.25rem;
}
.nota-oficial {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.75rem;
  border-left: 3px solid var(--green);
  background: #fff;
  border-radius: 0 8px 8px 0;
  color: var(--ink);
  font-size: 0.95rem;
  line-height: 1.5;
}
.nota-oficial strong {
  color: var(--green-deep);
}
.obl-box .guide-step {
  margin-bottom: 0.4rem;
}
.obl-box {
  margin-top: 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.85rem;
  background: #fbfdfc;
}
.obl-box h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-family: var(--display);
}
.obl-list {
  max-height: 280px;
  overflow: auto;
  display: grid;
  gap: 0.45rem;
  margin-top: 0.6rem;
  padding-right: 0.2rem;
}
.obl-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.65rem;
  align-items: center;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 0.65rem 0.75rem;
  background: #fff;
  cursor: pointer;
}
.obl-item:has(input:checked) {
  border-color: var(--green);
  background: var(--green-soft);
}
.obl-item.readonly {
  cursor: default;
  grid-template-columns: 1fr auto;
}
.obl-item.unica {
  border-color: var(--green);
  background: var(--green-soft);
}
.obl-item strong {
  display: block;
  font-size: 0.92rem;
}
.obl-item small {
  color: var(--muted);
  font-size: 0.8rem;
}
.obl-tasa {
  font-weight: 800;
  color: var(--green-deep);
  white-space: nowrap;
}

@media (max-width: 640px) {
  html { font-size: 17px; }
  .top, .shell { padding-left: 0.85rem; padding-right: 0.85rem; }
  .intro, .card { border-radius: 18px; padding: 1.05rem 0.95rem; }
  .review-row { grid-template-columns: 1fr; gap: 0.15rem; }
  .btn { width: 100%; }
  .nav { flex-direction: column-reverse; }
  .step-dot { font-size: 0.78rem; padding: 0.38rem 0.65rem; }
  .brand img { width: 44px; height: 44px; }
}