/* Modelo EPA™ — publicación de investigación abierta */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;1,400&family=IBM+Plex+Serif:wght@500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --epa-ink: #1a1f26;
  --epa-muted: #5c6570;
  --epa-line: #d9dde3;
  --epa-bg: #f7f6f3;
  --epa-surface: #fffefb;
  --epa-accent: #243d55;
  --epa-accent-soft: #eef2f6;
  --epa-warn: #6b5420;
  --epa-warn-bg: #f4ecd9;
  --epa-serif: "IBM Plex Serif", Georgia, serif;
  --epa-sans: "IBM Plex Sans", "Segoe UI", sans-serif;
  --epa-mono: "IBM Plex Mono", Consolas, monospace;
  --epa-wide: 72rem; /* ~1152px: aprovecha pantallas anchas sin llegar a full-bleed ilegible */
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--epa-bg);
  color: var(--epa-ink);
  font-family: var(--epa-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--epa-accent);
}

a:hover {
  text-decoration-thickness: 2px;
}

.epa-skip {
  position: absolute;
  left: -9999px;
}

.epa-skip:focus {
  left: 1rem;
  top: 1rem;
  z-index: 10;
  background: #fff;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--epa-line);
}

.epa-wrap {
  width: min(100% - 2.5rem, var(--epa-wide));
  margin-inline: auto;
}

.epa-topbar {
  border-bottom: 1px solid var(--epa-line);
  background: #fff;
}

.epa-topbar__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
  padding: 0.9rem 0;
}

.epa-brand {
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.epa-brand:hover {
  text-decoration: none;
}

.epa-brand__name {
  font-family: var(--epa-serif);
  font-weight: 600;
  font-size: 1.05rem;
}

.epa-brand__kind,
.epa-topbar__note {
  font-size: 0.8rem;
  color: var(--epa-muted);
}

.epa-shell {
  padding-bottom: 3rem;
}

.epa-masthead {
  padding: 2.5rem 0 1.25rem;
  border-bottom: 1px solid var(--epa-line);
}

.epa-masthead__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-bottom: 0.85rem;
}

.epa-kicker {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--epa-muted);
}

.epa-status {
  font-family: var(--epa-mono);
  font-size: 0.72rem;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--epa-line);
  background: #fff;
  color: var(--epa-muted);
}

.epa-title {
  font-family: var(--epa-serif);
  font-weight: 600;
  font-size: clamp(1.85rem, 4vw, 2.55rem);
  line-height: 1.2;
  max-width: 28ch;
  margin: 0 0 0.85rem;
}

.epa-lede {
  max-width: 72ch;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--epa-muted);
  margin: 0 0 1.5rem;
}

.epa-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.1rem;
  border-top: 1px solid var(--epa-line);
  padding-top: 0.75rem;
}

.epa-nav__link {
  display: inline-block;
  padding: 0.4rem 0.65rem;
  font-size: 0.86rem;
  color: var(--epa-muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.epa-nav__link:hover {
  color: var(--epa-ink);
}

.epa-nav__link.is-active {
  color: var(--epa-ink);
  border-bottom-color: var(--epa-ink);
  font-weight: 500;
}

.epa-main {
  padding-top: 2rem;
}

.epa-doc {
  width: 100%;
  max-width: none;
  background: var(--epa-surface);
  border: 1px solid var(--epa-line);
  padding: clamp(1.5rem, 3vw, 2.75rem) clamp(1.5rem, 4vw, 3rem);
}

.epa-doc > p,
.epa-doc > ul,
.epa-doc > ol,
.epa-doc > .epa-meta-line {
  max-width: 72ch;
}

.epa-doc > .epa-toc,
.epa-doc > .epa-table,
.epa-doc > .epa-pillars,
.epa-doc > .epa-note,
.epa-doc > .epa-hypothesis,
.epa-doc > .epa-legal,
.epa-doc > .epa-cite,
.epa-doc > .epa-canon,
.epa-doc > .epa-actions,
.epa-doc > .epa-tool,
.epa-doc > .epa-result,
.epa-doc > .epa-canvas-grid {
  max-width: none;
  width: 100%;
}


.epa-doc h2 {
  font-family: var(--epa-serif);
  font-size: 1.35rem;
  margin: 2rem 0 0.7rem;
  line-height: 1.3;
  font-weight: 600;
}

.epa-doc h2:first-child {
  margin-top: 0;
}

.epa-doc h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
  color: var(--epa-ink);
}

.epa-doc p,
.epa-doc li {
  font-size: 1rem;
  line-height: 1.7;
  color: #2a313b;
}

.epa-doc p {
  margin: 0 0 0.95rem;
}

.epa-doc ul,
.epa-doc ol {
  padding-left: 1.2rem;
  margin: 0 0 1.1rem;
}

.epa-doc li + li {
  margin-top: 0.3rem;
}

.epa-doc hr {
  border: 0;
  border-top: 1px solid var(--epa-line);
  margin: 1.75rem 0;
}

.epa-doc code {
  font-family: var(--epa-mono);
  font-size: 0.86em;
  background: var(--epa-accent-soft);
  padding: 0.1rem 0.3rem;
}

.epa-note,
.epa-hypothesis {
  padding: 0.85rem 1rem;
  margin: 1.25rem 0;
  font-size: 0.95rem;
}

.epa-note {
  background: var(--epa-accent-soft);
  border-left: 3px solid var(--epa-accent);
}

.epa-hypothesis {
  background: var(--epa-warn-bg);
  border-left: 3px solid var(--epa-warn);
}

.epa-toc {
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem;
  border-top: 1px solid var(--epa-line);
}

.epa-toc li {
  border-bottom: 1px solid var(--epa-line);
}

.epa-toc a {
  display: grid;
  grid-template-columns: 5.5rem 1fr auto;
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.75rem 0;
  text-decoration: none;
  color: inherit;
}

.epa-toc a:hover .epa-toc__title {
  text-decoration: underline;
}

.epa-toc__id {
  font-family: var(--epa-mono);
  font-size: 0.78rem;
  color: var(--epa-muted);
}

.epa-toc__title {
  font-weight: 500;
}

.epa-toc__state {
  font-size: 0.78rem;
  color: var(--epa-muted);
}

.epa-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.35rem;
  font-size: 0.94rem;
}

.epa-table th,
.epa-table td {
  border: 1px solid var(--epa-line);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.epa-table th {
  background: var(--epa-accent-soft);
  font-weight: 600;
}

.epa-meta-line {
  font-size: 0.92rem;
  color: var(--epa-muted);
  margin-bottom: 0.3rem;
}

.epa-pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.5rem;
  margin: 1rem 0 1.35rem;
}

.epa-pillars span {
  border: 1px solid var(--epa-line);
  padding: 0.5rem 0.65rem;
  font-size: 0.88rem;
  background: #fff;
}

.epa-footer {
  border-top: 1px solid var(--epa-line);
  background: #fff;
  padding: 2rem 0 2.5rem;
  color: var(--epa-muted);
  font-size: 0.9rem;
}

.epa-footer p {
  margin: 0 0 0.55rem;
  max-width: 80ch;
}

.epa-note,
.epa-hypothesis,
.epa-legal,
.epa-cite,
.epa-canon {
  width: 100%;
  box-sizing: border-box;
}

.epa-canon {
  margin: 1.25rem 0;
  padding: 1.1rem 1.25rem;
  border-left: 4px solid var(--epa-ink);
  background: #fff;
  font-family: var(--epa-serif);
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--epa-ink);
}

.epa-cite {
  border: 1px solid var(--epa-line);
  background: #fff;
  padding: 0.9rem 1rem;
  margin: 0.85rem 0;
}

.epa-cite__label {
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--epa-muted);
  margin: 0 0 0.45rem;
}

.epa-cite__text {
  font-family: var(--epa-mono);
  font-size: 0.86rem;
  line-height: 1.55;
  margin: 0 0 0.65rem;
  color: var(--epa-ink);
}

.epa-cite__btn {
  font-size: 0.8rem;
  padding: 0.3rem 0.65rem;
}


.epa-legal p {
  margin: 0 0 0.45rem;
  max-width: none;
  color: inherit;
}

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

.epa-footer .epa-legal {
  margin-top: 1rem;
}


/* Herramientas prácticas */

.epa-steps {
  counter-reset: epa-step;
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem;
}

.epa-steps li {
  counter-increment: epa-step;
  position: relative;
  padding: 0.85rem 0.85rem 0.85rem 3rem;
  border: 1px solid var(--epa-line);
  margin-bottom: 0.55rem;
  background: #fff;
}

.epa-steps li::before {
  content: counter(epa-step);
  position: absolute;
  left: 0.75rem;
  top: 0.85rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--epa-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.epa-tool {
  border: 1px solid var(--epa-line);
  background: #fff;
  padding: 1rem 1.1rem;
  margin: 1rem 0 1.5rem;
}

.epa-tool label {
  display: block;
  font-size: 0.86rem;
  font-weight: 600;
  margin: 0.75rem 0 0.3rem;
}

.epa-tool input[type="text"],
.epa-tool textarea,
.epa-tool select {
  width: 100%;
  max-width: 40rem;
  font: inherit;
  padding: 0.45rem 0.55rem;
  border: 1px solid var(--epa-line);
  background: var(--epa-surface);
}

.epa-tool textarea {
  min-height: 4.5rem;
  max-width: none;
}

.epa-dim {
  border-top: 1px solid var(--epa-line);
  padding-top: 0.85rem;
  margin-top: 0.85rem;
}

.epa-dim__head {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: baseline;
  justify-content: space-between;
}

.epa-dim__id {
  font-family: var(--epa-mono);
  font-size: 0.8rem;
  color: var(--epa-muted);
}

.epa-score-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0.55rem 0;
}

.epa-score-row label {
  margin: 0;
  font-weight: 500;
  border: 1px solid var(--epa-line);
  padding: 0.35rem 0.55rem;
  cursor: pointer;
  background: #fafafa;
}

.epa-score-row input {
  margin-right: 0.25rem;
}

.epa-score-row label:has(input:checked) {
  border-color: var(--epa-accent);
  background: var(--epa-accent-soft);
  font-weight: 600;
}

.epa-result {
  border: 1px solid var(--epa-line);
  background: var(--epa-accent-soft);
  padding: 1rem 1.15rem;
  margin: 1.25rem 0;
}

.epa-result__num {
  font-family: var(--epa-serif);
  font-size: 2.2rem;
  font-weight: 600;
  line-height: 1;
  margin: 0.35rem 0;
}

.epa-bars {
  display: grid;
  gap: 0.45rem;
  margin: 1rem 0;
}

.epa-bar {
  display: grid;
  grid-template-columns: 2.5rem 1fr 2rem;
  gap: 0.5rem;
  align-items: center;
  font-size: 0.86rem;
}

.epa-bar__track {
  height: 0.55rem;
  background: #e6e9ee;
  border: 1px solid var(--epa-line);
}

.epa-bar__fill {
  height: 100%;
  background: var(--epa-accent);
  width: 0%;
}

.epa-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.epa-btn {
  display: inline-block;
  border: 1px solid var(--epa-ink);
  background: var(--epa-ink);
  color: #fff;
  padding: 0.5rem 0.9rem;
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

.epa-btn:hover {
  opacity: 0.92;
  color: #fff;
  text-decoration: none;
}

.epa-btn--ghost {
  background: #fff;
  color: var(--epa-ink);
}

.epa-btn--ghost:hover {
  color: var(--epa-ink);
}

.epa-canvas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0 1.5rem;
}

.epa-canvas-cell {
  border: 1px solid var(--epa-line);
  background: #fff;
  padding: 0.85rem;
  min-height: 8rem;
}

.epa-canvas-cell h3 {
  margin: 0 0 0.5rem;
  font-size: 0.92rem;
  color: var(--epa-accent);
}

.epa-canvas-cell textarea {
  width: 100%;
  min-height: 5.5rem;
  border: 1px dashed var(--epa-line);
  font: inherit;
  padding: 0.4rem;
  background: var(--epa-bg);
}

@media print {
  .epa-topbar,
  .epa-nav,
  .epa-footer,
  .epa-actions {
    display: none !important;
  }

  .epa-masthead {
    padding-top: 0;
  }

  .epa-doc {
    border: 0;
    padding: 0;
  }
}

@media (max-width: 640px) {
  .epa-toc a {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .epa-topbar__note {
    width: 100%;
  }
}