/* Cifralia - hoja de estilos única (mobile-first). Sin fuentes ni recursos externos. */

:root {
  --bg: #F6F8FB;
  --surface: #FFFFFF;
  --text: #152238;
  --text-2: #4B5B70;
  --primary: #08756C;
  --primary-dark: #075C56;
  --primary-soft: #E8F5F3;
  --border: #D9E2EC;
  --control-border: #6B7A90;
  --error: #B42318;
  --error-bg: #FEF0EE;
  --warn-bg: #FFF4CC;
  --warn-text: #594300;
  --focus: #175CD3;
  --radius: 8px;
  --max: 70rem;
  --measure: 46rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
}

img,
svg {
  max-width: 100%;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.75rem;
  line-height: 1.25;
  color: var(--text);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; margin-top: 2.25rem; }
h3 { font-size: 1.125rem; margin-top: 1.5rem; }
h4 { font-size: 1rem; margin-top: 1.25rem; }

p,
ul,
ol,
dl {
  margin: 0 0 1rem;
}

ul,
ol {
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.35rem;
}

a {
  color: var(--primary-dark);
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.16em;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95em;
  overflow-wrap: anywhere;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

main:focus,
#results:focus,
#errorSummary:focus {
  outline: none;
}

#results:focus-visible,
#errorSummary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

/* ---------- Estructura general ---------- */

.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: 1rem;
}

.skip-link {
  position: absolute;
  left: 0.5rem;
  top: -5rem;
  z-index: 100;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  background: var(--primary-dark);
  color: #FFFFFF;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 0.5rem;
}

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-block: 0.5rem;
}

.brand {
  display: inline-block;
  align-self: flex-start;
  padding: 0.5rem 0;
  color: var(--primary-dark);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.25rem;
  margin: 0 -0.5rem;
  padding: 0;
  list-style: none;
}

.site-nav li + li {
  margin-top: 0;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0 0.5rem;
  color: var(--text);
  text-decoration: none;
  border-bottom: 3px solid transparent;
}

.site-nav a:hover {
  color: var(--primary-dark);
  border-bottom-color: var(--border);
}

.site-nav a[aria-current="page"] {
  color: var(--primary-dark);
  font-weight: 700;
  border-bottom-color: var(--primary);
}

main {
  display: block;
  padding-block: 1.5rem 3rem;
}

.breadcrumb {
  margin-bottom: 1.25rem;
  font-size: 0.9375rem;
  color: var(--text-2);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li + li {
  margin-top: 0;
}

.breadcrumb li + li::before {
  content: "/";
  content: "/" / "";
  margin-right: 0.5rem;
  color: var(--text-2);
}

.page-header {
  max-width: var(--measure);
  margin-bottom: 1.5rem;
}

.lead {
  font-size: 1.125rem;
  color: var(--text-2);
}

.prose {
  max-width: var(--measure);
}

.prose > section:first-child h2,
.prose > h2:first-child {
  margin-top: 0;
}

/* ---------- Avisos ---------- */

.notice {
  max-width: var(--measure);
  margin: 0 0 1.5rem;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-left-width: 6px;
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--text);
}

.notice-warning {
  border-color: #C79A00;
  background: var(--warn-bg);
  color: var(--warn-text);
}

.notice p:last-child {
  margin-bottom: 0;
}

.privacy-note {
  max-width: var(--measure);
  margin: 0 0 1.25rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--primary-soft);
  color: var(--text);
}

/* ---------- Botones ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.5rem 1.25rem;
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--primary-dark);
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.btn:hover {
  background: var(--primary-soft);
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
}

/* ---------- Portada ---------- */

.hero {
  max-width: var(--measure);
  padding-block: 0.5rem 1rem;
}

.hero .btn {
  margin-top: 0.5rem;
}

.card {
  max-width: var(--measure);
  margin-bottom: 1.5rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.card h2,
.card h3 {
  margin-top: 0;
}

.steps {
  max-width: var(--measure);
  padding-left: 1.5rem;
}

.steps li {
  padding-left: 0.25rem;
}

.soon-list {
  max-width: var(--measure);
  columns: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1rem 1rem 2.25rem;
}

/* ---------- Formulario ---------- */

.calculator {
  max-width: 56rem;
  margin-bottom: 2rem;
  padding: 1.25rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.calculator > h2 {
  margin-top: 0;
}

fieldset {
  min-width: 0;
  margin: 0 0 1.25rem;
  padding: 0;
  border: 0;
}

legend {
  padding: 0;
  margin-bottom: 0.75rem;
  font-size: 1.0625rem;
  font-weight: 700;
}

.fields-grid {
  display: grid;
  gap: 1.25rem;
}

.field {
  min-width: 0;
}

.field label,
.field .label-text {
  display: block;
  margin-bottom: 0.375rem;
  font-weight: 600;
}

.unit {
  font-weight: 400;
  color: var(--text-2);
}

.input-wrap {
  position: relative;
}

.input-wrap input {
  padding-right: 3.5rem;
}

.suffix {
  position: absolute;
  top: 50%;
  right: 0.875rem;
  transform: translateY(-50%);
  color: var(--text-2);
  pointer-events: none;
}

input[type="text"],
select {
  display: block;
  width: 100%;
  min-height: 3rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--control-border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

input[aria-invalid="true"],
select[aria-invalid="true"] {
  border: 2px solid var(--error);
  background: var(--error-bg);
}

.help {
  margin: 0.375rem 0 0;
  font-size: 0.9375rem;
  color: var(--text-2);
}

.field-error {
  margin: 0.375rem 0 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--error);
}

.field-error:empty,
.example-note:empty {
  display: none;
}

.field-error:not(:empty)::before {
  content: "Error: ";
}

.radio-group {
  margin-top: 0.25rem;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-height: 2.75rem;
}

.radio-option input {
  flex: none;
  width: 1.375rem;
  height: 1.375rem;
  margin: 0;
  accent-color: var(--primary);
}

.radio-option label {
  flex: 1;
  padding-block: 0.375rem;
}

.error-summary {
  margin-bottom: 1.25rem;
  padding: 1rem;
  border: 2px solid var(--error);
  border-radius: var(--radius);
  background: var(--error-bg);
  color: var(--text);
}

.error-summary[hidden],
#results[hidden] {
  display: none;
}

.error-summary h3 {
  margin: 0 0 0.5rem;
  color: var(--error);
}

.error-summary ul {
  margin: 0;
}

.error-summary a {
  color: var(--error);
  font-weight: 600;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.example-note {
  margin: 1rem 0 0;
  padding: 0.625rem 0.875rem;
  border-left: 4px solid var(--primary);
  background: var(--primary-soft);
  font-weight: 600;
}

/* ---------- Resultados ---------- */

.results {
  max-width: 56rem;
  margin-bottom: 2rem;
  padding: 1.25rem 1rem;
  border: 2px solid var(--primary);
  border-radius: var(--radius);
  background: var(--surface);
}

.results > h2 {
  margin-top: 0;
}

.key-results {
  display: grid;
  gap: 0.75rem;
  padding: 0;
}

.key-results > div {
  min-width: 0;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--primary-soft);
}

.key-results dt {
  font-weight: 600;
  color: var(--text-2);
}

.key-results dd {
  margin: 0.25rem 0 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  overflow-wrap: anywhere;
}

.key-results .is-main dd {
  font-size: 1.875rem;
}

.data-list {
  padding: 0;
  border-top: 1px solid var(--border);
}

.data-list > div {
  display: flex;
  flex-direction: column;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--border);
}

.data-list dt {
  color: var(--text-2);
}

.data-list dd {
  margin: 0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.formula {
  padding: 0.625rem 0.875rem;
  border-left: 4px solid var(--primary);
  background: var(--bg);
  overflow-wrap: anywhere;
}

/* ---------- Contenido educativo ---------- */

.var-list {
  padding: 0;
}

.var-list > div {
  margin-bottom: 0.5rem;
}

.var-list dt {
  display: inline;
  font-weight: 700;
}

.var-list dd {
  display: inline;
  margin: 0;
}

.faq h3 {
  margin-top: 1.5rem;
}

.table-wrap {
  max-width: 36rem;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

caption {
  padding-bottom: 0.5rem;
  text-align: left;
  color: var(--text-2);
}

th,
td {
  padding: 0.5rem 0.625rem;
  border: 1px solid var(--border);
  text-align: right;
}

th:first-child,
td:first-child {
  text-align: left;
}

thead th {
  background: var(--primary-soft);
}

/* ---------- Pie ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding-block: 2rem;
  color: var(--text-2);
}

.footer-grid {
  display: grid;
  gap: 1.5rem;
}

.footer-title {
  margin: 0 0 0.5rem;
  font-weight: 700;
  color: var(--text);
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li {
  margin-top: 0;
}

.site-footer a {
  display: inline-block;
  padding-block: 0.375rem;
}

.footer-note {
  max-width: var(--measure);
  margin: 1.5rem 0 0;
  font-size: 0.9375rem;
}

/* ---------- Pantallas mayores ---------- */

@media (min-width: 40em) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.5rem; }

  .header-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
  }

  .site-nav ul {
    margin: 0;
    gap: 0 0.5rem;
  }

  .site-nav a {
    padding: 0 0.75rem;
  }

  .soon-list {
    columns: 2;
    column-gap: 2rem;
  }

  .actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .key-results {
    grid-template-columns: repeat(3, 1fr);
  }

  .key-results .is-main {
    grid-column: 1 / -1;
  }

  .data-list > div {
    flex-direction: row;
    justify-content: space-between;
    gap: 1.5rem;
  }

  .data-list dd {
    text-align: right;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .calculator,
  .results {
    padding: 1.75rem;
  }
}

@media (min-width: 48em) {
  .fields-grid {
    grid-template-columns: 1fr 1fr;
  }

  .key-results {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}


/* ========== Fase 2: portada, tarjetas, tablas, relacionados ========== */

main.home {
  padding-top: 0;
}

.hero-band {
  margin-bottom: 2rem;
  padding-block: 2rem;
  background: var(--primary-soft);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

.hero-grid h1 {
  margin-bottom: 1rem;
}

.hero-grid .notice {
  background: var(--surface);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.hero-figure {
  margin: 0;
}

.hero-figure img,
.figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.figure {
  max-width: var(--measure);
  margin: 0 0 1.75rem;
}

.figure figcaption {
  margin-top: 0.5rem;
  font-size: 0.9375rem;
  color: var(--text-2);
}

.section-intro {
  max-width: var(--measure);
}

.page-header {
  padding-left: 1rem;
  border-left: 6px solid var(--primary);
}

.page-title {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.page-title h1 {
  margin: 0;
}

.page-icon {
  flex: none;
  width: 3rem;
  height: 3rem;
  border-radius: 10px;
}

.card-grid {
  display: grid;
  gap: 1rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.card-grid > li {
  margin: 0;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 100%;
  padding: 1.125rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.tool-card:hover {
  border-color: var(--primary);
}

.tool-card:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.tool-card img {
  width: 3rem;
  height: 3rem;
}

.tool-card h3 {
  margin: 0;
  font-size: 1.0625rem;
}

.tool-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.tool-card h3 a::after {
  content: "";
  position: absolute;
  inset: 0;
}

.tool-card h3 a:focus-visible {
  outline: none;
}

.tool-card p {
  margin: 0;
  color: var(--text-2);
}

.cat-grid {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.cat-block {
  padding: 1.125rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.cat-block h3 {
  margin-top: 0;
}

.link-list {
  margin: 0;
  padding-left: 1.25rem;
}

.related {
  margin-top: 2.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.related-grid {
  display: grid;
  gap: 0 2rem;
}

.related h3 {
  margin-top: 1rem;
}

.related ul {
  padding-left: 1.25rem;
}

.table-scroll {
  max-width: 100%;
  margin-bottom: 1rem;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.table-scroll table {
  min-width: 26rem;
}

.table-scroll th,
.table-scroll td {
  border-left: 0;
  border-right: 0;
}

.table-scroll th[scope="row"],
.table-wrap th[scope="row"] {
  font-weight: 600;
}

.table-scroll caption,
.table-wrap caption {
  padding: 0.5rem 0.625rem;
  font-size: 0.9375rem;
}

.monthly-details {
  margin-bottom: 1rem;
}

.monthly-details summary {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  font-weight: 600;
  cursor: pointer;
}

.results .notice {
  max-width: none;
}

.results h4 {
  margin-top: 1.25rem;
}

.radio-field {
  margin-bottom: 1.25rem;
}

@media (min-width: 40em) {
  .hero-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .cat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 60em) {
  .hero-grid {
    grid-template-columns: 1.1fr 1fr;
    gap: 2.5rem;
  }

  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1.2fr 1.2fr 1fr 1fr;
  }
}