:root {
  --bg: #f3f5f7;
  --bg-elev: #ffffff;
  --ink: #12151a;
  --muted: #5b6470;
  --line: #dbe1e8;
  --brand: #0b6e4f;
  --brand-2: #098a61;
  --brand-soft: #e7f6ef;
  --warn-bg: #fff7e8;
  --warn-ink: #8a5a00;
  --warn-line: #f0d7a2;
  --danger: #b42318;
  --shadow: 0 10px 30px rgba(18, 21, 26, .06);
  --radius: 14px;
  --font: Inter, "Segoe UI", system-ui, -apple-system, sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --max: 1120px;
}
html[data-theme="dark"] {
  --bg: #0e1217;
  --bg-elev: #171c23;
  --ink: #eef2f6;
  --muted: #9aa6b2;
  --line: #2a3340;
  --brand: #3dd68c;
  --brand-2: #62e0a4;
  --brand-soft: #143528;
  --warn-bg: #2a2112;
  --warn-ink: #f0c36d;
  --warn-line: #5a4520;
  --danger: #ff7b72;
  --shadow: 0 12px 32px rgba(0,0,0,.35);
}
* { box-sizing: border-box; }
html { font-size: 16px; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  min-width: 320px;
}
a { color: var(--brand); }
a:hover { color: var(--brand-2); }
.wrap { width: min(var(--max), calc(100% - 1.5rem)); margin: 0 auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: .75rem; min-height: 3.5rem;
}
.brand {
  font-weight: 760; letter-spacing: -.02em; text-decoration: none; color: var(--ink);
  font-size: 1.05rem;
}
.brand span { color: var(--brand); }
.header-actions { display: flex; align-items: center; gap: .4rem; }
.icon-btn {
  width: 2.4rem; height: 2.4rem; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink);
  display: inline-flex; align-items: center; justify-content: center; cursor: pointer;
}
.icon-btn:hover { border-color: var(--brand); }
.nav-desktop { display: flex; gap: .2rem; align-items: center; }
.nav-desktop a {
  text-decoration: none; color: var(--muted); font-size: .92rem; font-weight: 600;
  padding: .45rem .7rem; border-radius: 999px;
}
.nav-desktop a[aria-current="page"], .nav-desktop a:hover {
  color: var(--ink); background: var(--brand-soft);
}
.nav-toggle { display: none; }
.nav-drawer {
  display: none; border-top: 1px solid var(--line); padding: .75rem 0 1rem;
}
.nav-drawer.open { display: block; }
.nav-drawer a {
  display: block; text-decoration: none; color: var(--ink); font-weight: 600;
  padding: .8rem .2rem; border-bottom: 1px solid var(--line);
}
@media (max-width: 860px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: inline-flex; }
}

/* Hero / page */
.hero { padding: 1.4rem 0 1rem; }
.hero h1 {
  margin: 0 0 .45rem; font-size: clamp(1.55rem, 4vw, 2.2rem);
  letter-spacing: -.03em; line-height: 1.15;
}
.hero p { margin: 0; color: var(--muted); max-width: 60ch; }
.kicker {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .78rem; font-weight: 700; color: var(--brand);
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: .55rem;
}
.notice {
  display: flex; gap: .7rem; align-items: flex-start;
  background: var(--warn-bg); color: var(--warn-ink);
  border: 1px solid var(--warn-line); border-radius: 12px;
  padding: .8rem .95rem; margin: 0 0 1rem; font-size: .9rem;
}

/* Layout tool */
.layout {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1rem; align-items: start; padding-bottom: 2rem;
}
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .preview-pane { order: -1; }
  .mobile-only-tabs { display: flex; }
}
@media (min-width: 901px) {
  .mobile-only-tabs { display: none; }
  .preview-pane { position: sticky; top: 4.4rem; }
}
.mobile-only-tabs { gap: .5rem; margin-bottom: .75rem; }
.seg {
  flex: 1; border: 1px solid var(--line); background: var(--bg-elev); color: var(--muted);
  border-radius: 999px; padding: .65rem .8rem; font-weight: 700; cursor: pointer;
}
.seg[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: #fff; }

.card {
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1rem 1.05rem;
}
.card h2 { margin: 0 0 .85rem; font-size: 1rem; letter-spacing: -.01em; }
.step {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.35rem; height: 1.35rem; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand); font-size: .75rem; font-weight: 800;
  margin-right: .4rem;
}

label.field {
  display: block; margin: .7rem 0 .28rem; font-size: .82rem; font-weight: 700; color: var(--muted);
}
input[type="text"], input[type="date"], textarea, select {
  width: 100%; min-height: 2.7rem; border: 1px solid var(--line); border-radius: 11px;
  background: var(--bg); color: var(--ink); font: inherit; padding: .65rem .8rem;
}
textarea { min-height: 5rem; resize: vertical; }
input:focus, textarea:focus, select:focus {
  outline: 2px solid color-mix(in srgb, var(--brand) 45%, transparent);
  border-color: var(--brand);
}
input[type="radio"], input[type="checkbox"] {
  width: auto; margin: 0; flex: 0 0 auto; accent-color: var(--brand);
}
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: .7rem; }
@media (max-width: 560px) { .row-2 { grid-template-columns: 1fr; } }

.roles { display: grid; gap: .55rem; }
.role {
  display: flex; align-items: center; gap: .7rem; justify-content: flex-start;
  margin: 0; width: 100%; padding: .8rem .9rem; border-radius: 12px;
  border: 1px solid var(--line); background: var(--bg); cursor: pointer; font-weight: 650;
}
.role:has(input:checked) {
  border-color: var(--brand); background: var(--brand-soft);
  box-shadow: inset 3px 0 0 var(--brand);
}
.role span { font-size: .95rem; }

.actions { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1rem; }
.btn {
  appearance: none; border: 0; border-radius: 11px; padding: .72rem 1rem;
  font: inherit; font-weight: 750; cursor: pointer; text-decoration: none; display: inline-flex;
  align-items: center; justify-content: center; gap: .35rem;
}
.btn-primary { background: var(--brand); color: #04140e; }
html:not([data-theme="dark"]) .btn-primary { color: #fff; }
.btn-secondary { background: var(--bg); color: var(--ink); border: 1px solid var(--line); }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid transparent; }
details.extra { margin-top: .9rem; border-top: 1px solid var(--line); padding-top: .7rem; }

.form-group {
  margin: 1rem 0 0;
  padding: .85rem 0 0;
  border: 0;
  border-top: 1px solid var(--line);
  min-inline-size: 0;
}
.form-group legend {
  padding: 0;
  font-size: .78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--muted);
}

details.extra summary { cursor: pointer; color: var(--muted); font-weight: 700; font-size: .9rem; }

.letter {
  font-family: "Times New Roman", Times, serif;
  font-size: 12.5pt;
  line-height: 1.6;
  background: #fff;
  color: #000;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 28px 32px;
  min-height: 20rem;
  box-shadow: 0 1px 0 rgba(0,0,0,.04), 0 12px 28px rgba(18,21,26,.06);
}
html[data-theme="dark"] .letter {
  /* el documento impreso/preview siempre se ve como hoja blanca */
  background: #fff;
  color: #000;
  border-color: #ccc;
}
.letter-head {
  text-align: center;
  font-weight: 700;
  font-size: 13.5pt;
  margin: 0 0 1.4rem;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.letter-meta { margin-bottom: 1.1rem; color: #000; }
.letter-body p { margin: 0 0 .95rem; text-align: justify; text-indent: 0; }
.letter-sign { margin-top: 2.4rem; }
.letter-sign p { margin: .2rem 0; }
.stamp { display: none !important; }


/* Hub landing */
.hub { padding: 0 0 2.2rem; }
.hub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .85rem;
}
.hub-card {
  position: relative;
  display: flex; flex-direction: column; gap: .35rem;
  text-decoration: none; color: inherit;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1.1rem 1.15rem 1.2rem; min-height: 7.5rem;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.hub-card:hover {
  border-color: var(--brand);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--brand) 12%, transparent);
  color: inherit;
}
.hub-card--primary {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, var(--brand-soft), var(--bg-elev) 55%);
  border-color: color-mix(in srgb, var(--brand) 35%, var(--line));
  min-height: 8.5rem;
  padding: 1.25rem 1.25rem 1.35rem;
}
.hub-badge {
  align-self: flex-start;
  font-size: .72rem; font-weight: 800; letter-spacing: .04em;
  text-transform: uppercase; color: #04140e;
  background: var(--brand); border-radius: 999px;
  padding: .28rem .65rem; margin-bottom: .25rem;
}
html:not([data-theme="dark"]) .hub-badge { color: #fff; }
.hub-card-title {
  font-size: 1.05rem; letter-spacing: -.02em; line-height: 1.25;
}
.hub-card--primary .hub-card-title { font-size: 1.25rem; }
.hub-card-desc {
  color: var(--muted); font-size: .92rem; max-width: 48ch;
  flex: 1;
}
.hub-card-arrow {
  position: absolute; right: 1rem; bottom: 1rem;
  color: var(--brand); font-weight: 800; font-size: 1.1rem;
}
.hub-seo-links {
  margin: 1.1rem 0 0; font-size: .85rem; color: var(--muted);
}
.hub-seo-links a { color: var(--muted); text-decoration: underline; text-underline-offset: 2px; }
.hub-seo-links a:hover { color: var(--brand); }
@media (max-width: 640px) {
  .hub-grid { grid-template-columns: 1fr; }
  .hub-card--primary { grid-column: auto; }
}
@media (max-width: 320px) {
  .hub-card { padding: .9rem; min-height: 0; }
  .hub-card--primary .hub-card-title { font-size: 1.1rem; }
  .hub-card-arrow { right: .75rem; bottom: .75rem; }
}
/* Content pages / silo */
.prose { max-width: 72ch; padding: 1.3rem 0 2.5rem; }
.prose h1 { margin: 0 0 .6rem; font-size: clamp(1.6rem, 4vw, 2.1rem); letter-spacing: -.03em; }
.prose h2 { margin: 1.5rem 0 .5rem; font-size: 1.15rem; }
.prose p, .prose li { color: var(--ink); }
.prose .muted, .muted { color: var(--muted); }
.silo-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: .75rem; margin: 1rem 0 0;
}
@media (max-width: 760px) { .silo-grid { grid-template-columns: 1fr; } }
.silo-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--bg-elev); border: 1px solid var(--line); border-radius: 14px;
  padding: 1rem; box-shadow: var(--shadow);
}
.silo-card strong { display: block; margin-bottom: .25rem; }
.silo-card span { color: var(--muted); font-size: .9rem; }

.site-footer {
  border-top: 1px solid var(--line); margin-top: 1rem; padding: 1.1rem 0 1.5rem;
  color: var(--muted); font-size: .88rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer-nav { display: flex; flex-wrap: wrap; gap: .8rem; }
.footer-nav a { color: var(--muted); text-decoration: none; }
.footer-nav a:hover { color: var(--brand); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}
.panel[hidden] { display: none !important; }

@media (max-width: 320px) {
  .wrap { width: calc(100% - 1rem); }
  .hero h1 { font-size: 1.35rem; }
  .card { padding: .85rem; }
  .btn { width: 100%; }
}

@media print {
  .site-header, .site-footer, .hero, .notice, .form-pane, .mobile-only-tabs, .actions, .no-print { display: none !important; }
  body { background: #fff; }
  .wrap, .layout, .preview-pane, .card { width: 100%; max-width: none; margin: 0; border: 0; box-shadow: none; padding: 0; }
  .letter { border: 0; }
}