/* =========================================================
   NomiClaro — sistema de diseño
   Paleta: papel neutro + tinta marina + verde cartera (dinero)
   Tipografía: Source Serif 4 (titulares) + IBM Plex Sans (UI/cifras)
   ========================================================= */

:root {
  --bg: #FAFAF7;
  --surface: #FFFFFF;
  --ink: #1B2430;
  --ink-soft: #4B5768;
  --ink-faint: #8993A1;
  --accent: #0F6B5C;
  --accent-dark: #0B4F44;
  --accent-pale: #E7F0EC;
  --gold: #A97E1E;
  --gold-pale: #F4ECD8;
  --line: #DEDAD0;
  --negative: #9C3B32;
  --negative-pale: #F5E7E4;

  --serif: "Source Serif 4", Georgia, serif;
  --sans: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius-s: 3px;
  --radius-m: 6px;
  --content-w: 780px;
  --page-w: 1120px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--accent-dark); text-decoration-color: var(--line); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.18;
  margin: 0 0 0.5em;
}
h1 { font-size: clamp(1.9rem, 1.5rem + 1.8vw, 2.9rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.9rem); letter-spacing: -0.005em; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1em; color: var(--ink-soft); max-width: 68ch; }
p.lead { font-size: 1.1rem; color: var(--ink); max-width: 62ch; }

.nums, input, .result-value, .table-num {
  font-variant-numeric: tabular-nums;
}

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

/* ---------- Layout helpers ---------- */

.wrap { max-width: var(--page-w); margin: 0 auto; padding: 0 24px; }
.prose-wrap { max-width: var(--content-w); margin: 0 auto; padding: 0 24px; }

section { padding: 56px 0; }
section.tight { padding: 32px 0; }
.border-top { border-top: 1px solid var(--line); }

/* ---------- Header ---------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.brand span.mark {
  color: var(--accent);
}
nav.main-nav {
  display: flex;
  gap: 28px;
}
nav.main-nav a {
  font-size: 0.95rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
}
nav.main-nav a:hover, nav.main-nav a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
.nav-toggle { display: none; }

@media (max-width: 720px) {
  nav.main-nav {
    position: fixed;
    inset: 68px 0 0 0;
    background: var(--bg);
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease, transform 0.15s ease;
  }
  nav.main-nav.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  nav.main-nav a { padding: 14px 4px; border-bottom: 1px solid var(--line); }
  .nav-toggle {
    display: block;
    background: none;
    border: 1px solid var(--line);
    border-radius: var(--radius-s);
    width: 40px; height: 40px;
    font-size: 1.2rem;
    color: var(--ink);
  }
}

/* ---------- Hero ---------- */

.hero {
  padding: 48px 0 40px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
}
.hero-eyebrow-free {
  color: var(--accent-dark);
  font-size: 0.95rem;
  margin-bottom: 10px;
}
.hero p.lead { margin-bottom: 24px; }

/* ---------- Calculator card ---------- */

.calc-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  padding: 28px;
}
.calc-card h2, .calc-card h3 { margin-bottom: 4px; }
.calc-sub { color: var(--ink-faint); font-size: 0.9rem; margin-bottom: 20px; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.field-row.single { grid-template-columns: 1fr; }
@media (max-width: 520px) {
  .field-row { grid-template-columns: 1fr; }
}

.field label {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
.field input[type="number"],
.field input[type="text"],
.field select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--ink);
}
.field input:focus, .field select:focus {
  border-color: var(--accent);
  background: var(--surface);
}
.field-help { font-size: 0.78rem; color: var(--ink-faint); margin-top: 4px; }

.radio-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  padding: 9px 14px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  cursor: pointer;
  background: var(--bg);
}
.radio-group input { accent-color: var(--accent); }
.radio-group label:has(input:checked) {
  border-color: var(--accent);
  color: var(--ink);
  background: var(--accent-pale);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-s);
  padding: 13px 22px;
  font-size: 1rem;
  font-family: var(--sans);
  font-weight: 500;
  cursor: pointer;
  width: 100%;
  margin-top: 4px;
}
.btn:hover { background: var(--accent-dark); }

/* ---------- Results ---------- */

.result-panel {
  margin-top: 24px;
  border-top: 1px dashed var(--line);
  padding-top: 20px;
}
.result-headline {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--accent-pale);
  border-radius: var(--radius-s);
  margin-bottom: 14px;
}
.result-headline .label { color: var(--accent-dark); font-size: 0.95rem; }
.result-headline .value {
  font-family: var(--serif);
  font-size: 1.7rem;
  color: var(--accent-dark);
  font-weight: 600;
}
.result-line {
  display: flex;
  justify-content: space-between;
  padding: 8px 2px;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
}
.result-line:last-child { border-bottom: none; }
.result-line .k { color: var(--ink-soft); }
.result-line .v { color: var(--ink); font-weight: 500; }
.result-line.deduction .v { color: var(--negative); }
.result-note {
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

/* ---------- Tool list / cards ---------- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
@media (max-width: 800px) {
  .tool-grid { grid-template-columns: 1fr; }
}
.tool-card {
  background: var(--surface);
  padding: 26px;
  text-decoration: none;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.tool-card:hover { background: var(--accent-pale); }
.tool-card .cat {
  font-size: 0.78rem;
  color: var(--accent-dark);
}
.tool-card h3 { margin-bottom: 2px; }
.tool-card p { font-size: 0.9rem; margin-bottom: 0; color: var(--ink-soft); }
.tool-card.disabled { color: var(--ink-faint); cursor: default; }
.tool-card.disabled:hover { background: var(--surface); }
.tool-card.disabled .cat { color: var(--ink-faint); }

/* ---------- Section headers ---------- */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}
.section-head h2 { margin-bottom: 0; }
.section-head .see-all { font-size: 0.9rem; white-space: nowrap; }

/* ---------- Article / SEO content ---------- */

article.info h2 { margin-top: 1.6em; }
article.info h2:first-child { margin-top: 0; }
article.info ul, article.info ol {
  color: var(--ink-soft);
  max-width: 66ch;
  padding-left: 1.2em;
}
article.info li { margin-bottom: 0.5em; }

.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.faq-item:first-child { padding-top: 0; }
.faq-item h3 { font-size: 1.02rem; margin-bottom: 6px; }
.faq-item p { margin-bottom: 0; font-size: 0.95rem; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 0.92rem;
}
table.data-table th, table.data-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}
table.data-table th {
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.82rem;
}
table.data-table td.num { text-align: right; }

/* ---------- Footer ---------- */

footer.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 32px;
  margin-top: 40px;
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-cols { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h4 {
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin: 0 0 10px;
  font-weight: 500;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--ink-soft);
  text-decoration: none;
  margin-bottom: 8px;
}
.footer-col a:hover { color: var(--ink); }
.footer-legal {
  color: var(--ink-faint);
  font-size: 0.82rem;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  max-width: 68ch;
}

/* ---------- Utility ---------- */

.stack-24 > * + * { margin-top: 24px; }
.text-center { text-align: center; }
.tag {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--gold);
  background: var(--gold-pale);
  padding: 3px 9px;
  border-radius: 20px;
  margin-bottom: 10px;
}