/* Calcular Porcentaje — diseño moderno y profesional */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #eff6ff;
  --ink: #0f172a;
  --text: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --gray-bg: #f8fafc;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  font-family: "Plus Jakarta Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
a { color: var(--blue); }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--blue); outline-offset: 2px;
}
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff;
  padding: 8px 14px; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ---------- Cabecera Moderna ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.85);
  box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.04);
  transition: all 0.25s ease;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 13px;
  padding-bottom: 13px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}
.brand:hover {
  transform: translateY(-1px);
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.25s ease;
}
.brand:hover .brand-mark {
  transform: rotate(-6deg) scale(1.08);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.45);
}
.brand-name {
  font-weight: 800;
  font-size: 1.16rem;
  letter-spacing: -0.025em;
  color: #0f172a;
}
.brand-highlight {
  color: #2563eb;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.site-nav {
  display: flex;
  align-items: center;
}
.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  display: inline-flex;
  align-items: center;
  padding: 7px 13px;
  border-radius: 8px;
  color: #475569;
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}
.nav-list a:hover {
  background: #f1f5f9;
  color: #1d4ed8;
  transform: translateY(-1px);
}
.nav-list a.active,
.nav-list a[aria-current="page"] {
  background: #eff6ff;
  color: #1d4ed8;
  border-color: #bfdbfe;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.08);
}

/* ---------- Héroes (planos, sin banda) ---------- */
.hero { background: #fff; padding: 34px 0 10px; }
.hero h1 { font-size: 2.5rem; line-height: 1.2; margin: 0 0 10px; color: var(--ink); font-weight: 700; }
.lede { font-size: 1.08rem; color: var(--text); max-width: 46rem; margin: 0; }
.page-hero { background: #fff; padding: 26px 0 4px; }
.page-hero h1 { font-size: 2.4rem; line-height: 1.2; margin: 4px 0 8px; color: var(--ink); font-weight: 700; }
.page-hero .lede { font-size: 1.03rem; }
.crumb { margin: 0; font-size: .9rem; color: var(--muted); }
.crumb a { color: var(--blue); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }

/* ---------- Caja calculadora ---------- */
.calculator, .tool-card {
  background: #f4f8fd;
  border: 1.5px solid #c7d6ee;
  border-radius: 12px;
  box-shadow: 0 14px 34px rgba(70, 105, 180, .14);
  padding: 26px 28px 28px;
  margin-top: 22px;
}
.calc-heading {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  margin: -26px -28px 22px;
  padding: 16px 28px;
  border-radius: 10px 10px 0 0;
  font-size: 1.28rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

/* Tabs / Modos (ahora en la parte inferior de la calculadora) */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid #d5e0f0;
  border-radius: 10px;
  padding: 6px;
  margin-bottom: 0;
  justify-content: center;
}
.tabs button,
.tabs a.tab-link {
  font: inherit;
  font-size: 0.94rem;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1.5px solid #d5e0f0;
  background: #ffffff;
  color: #334155 !important;
  cursor: pointer;
  text-decoration: none !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
/* Unselected tab hover */
.tabs button:not([aria-selected="true"]):hover,
.tabs a.tab-link:not(.active):hover {
  background: #eff6ff !important;
  color: var(--blue-dark) !important;
  border-color: #bfdbfe !important;
}
/* Selected active tab: solid vibrant royal blue with pure white text */
.tabs button[aria-selected="true"],
.tabs a.tab-link.active {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%) !important;
  color: #ffffff !important;
  border-color: #1d4ed8 !important;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28) !important;
}
/* Active tab hover: deep blue with white text (NEVER white on white!) */
.tabs button[aria-selected="true"]:hover,
.tabs a.tab-link.active:hover {
  background: #1e40af !important;
  color: #ffffff !important;
  border-color: #1e40af !important;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.38) !important;
}
.tabs button:focus-visible,
.tabs a.tab-link:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.suffix:empty { display: none; }
.mode-title { font-size: 1.15rem; font-weight: 700; margin: 0 0 4px; color: var(--blue-dark); }
.mode-hint { color: var(--muted); margin: 0 0 16px; font-size: .95rem; }
.fields { display: flex; flex-wrap: wrap; gap: 12px 16px; }
.field { flex: 1 1 180px; display: flex; flex-direction: column; gap: 5px; }
.field-small { flex: 0 1 150px; }
.field label { font-weight: 600; font-size: .92rem; color: var(--ink); }
.input-wrap { display: flex; align-items: stretch; }
.input-wrap input, .input-wrap select, .field > input, .field > select {
  width: 100%; font: inherit; font-size: 1.05rem; color: var(--ink);
  padding: 11px 14px; border: 1.5px solid #b9c9e4; border-radius: 6px; background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.input-wrap input:focus, .input-wrap select:focus, .field > input:focus, .field > select:focus {
  border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, .15); outline: none;
}
.suffix {
  display: inline-flex; align-items: center; padding: 0 14px; margin-left: -1px;
  border: 1.5px solid #b9c9e4; border-left: 0; border-radius: 0 6px 6px 0;
  background: #e3ecf8; color: var(--text); font-weight: 600;
}
.field-error { color: #d43a4e; font-size: .9rem; margin: 8px 0 0; }
.field-hint { color: var(--muted); font-size: .88rem; margin: 6px 0 0; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; align-items: center; justify-content: center; }
.btn {
  font: inherit; font-weight: 700; font-size: 1.02rem; border-radius: 8px; cursor: pointer;
  padding: 11px 26px; border: 1.5px solid transparent; text-decoration: none;
  display: inline-flex; align-items: center; justify-content: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff !important; border-color: #1d4ed8;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.28);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  color: #fff !important; border-color: #1e40af;
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.38); transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(1px); box-shadow: 0 2px 6px rgba(37, 99, 235, 0.2);
}
.btn-ghost {
  background: #fff; border-color: #cbd5e1; color: #334155 !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
.btn-ghost:hover {
  background: #eff6ff; border-color: #93c5fd; color: #1d4ed8 !important;
  transform: translateY(-1px);
}
.btn-ghost:active { transform: translateY(1px); }
.btn-small { padding: 7px 14px; font-size: .9rem; }

/* ---------- Resultado ---------- */
.result {
  margin-top: 18px; border-radius: var(--radius); padding: 16px 18px;
  background: var(--blue-soft); border: 1px solid #d5e0f0;
}
.result-main { font-size: 1.55rem; font-weight: 700; color: var(--blue-dark); margin: 0; line-height: 1.3; }
.result-formula {
  display: inline-block; margin-top: 6px; font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: .92rem; background: #fff; border: 1px solid #d5e0f0;
  padding: 4px 10px; border-radius: 4px; color: var(--ink);
}
.result-rows { margin-top: 10px; }
.result-rows > div { display: flex; justify-content: space-between; gap: 16px; padding: 6px 0; border-top: 1px solid #d5e0f0; }
.result-explain { color: var(--text); margin: 8px 0 0; }
.result-actions { display: flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; justify-content: center; }
.copy-confirm { color: #257942; font-weight: 600; margin: 8px 0 0; }

/* ---------- Contenido (plano, sin tarjetas) ---------- */
.content { padding: 26px 0 6px; }
.content h2, .article h2 {
  font-size: 26px; line-height: 1.3; margin: 0 0 12px; color: var(--ink); font-weight: 700;
}
.content p, .article p { color: var(--text); }
.formula {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  background: var(--gray-bg); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 12px 15px; margin: 12px 0; font-size: .98rem; color: var(--ink);
  overflow-x: auto;
}
.formula-list { background: var(--gray-bg); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px 18px; margin: 12px 0; }
.formula-list li { margin: 4px 0; }

/* ---------- Herramientas ---------- */
.tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 16px; }
a.tool-card { margin-top: 0; text-decoration: none; color: var(--ink); display: block; padding: 18px; }
a.tool-card:hover { border-color: var(--blue); }
.tool-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: var(--radius); margin-bottom: 10px;
  background: var(--blue-soft); color: var(--blue-dark); font-weight: 700; font-size: 1rem;
}
a.tool-card strong { display: block; font-size: 1.02rem; margin-bottom: 4px; }
a.tool-card p { margin: 0; color: var(--muted); font-size: .93rem; }

/* ---------- Artículo ---------- */
.article { padding: 10px 0 34px; font-size: 1.0rem; }
.article h2 { margin-top: 30px; }
.article h2:first-child { margin-top: 6px; }
.article h3 { font-size: 1.18rem; margin: 22px 0 6px; color: var(--ink); }
.article p { margin: 9px 0; line-height: 1.7; }
.article ul, .article ol { margin: 9px 0; padding-left: 24px; }
.article li { margin: 5px 0; line-height: 1.6; }
.article table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: .96rem; }
.article th { text-align: left; padding: 9px 12px; color: var(--ink); border-bottom: 2px solid var(--line); font-weight: 700; }
.article td { padding: 8px 12px; border-bottom: 1px solid var(--line); }
.article tbody tr:nth-child(even) td { background: #fafafa; }

/* ---------- FAQ ---------- */
.faq-block { margin-top: 30px; border-top: 1px solid var(--line); padding-top: 6px; }
.faq-block h3 { color: var(--ink); font-size: 1.08rem; margin: 18px 0 4px; padding-top: 14px; border-top: 1px solid #eee; }
.faq-block h3:first-of-type { border-top: 0; padding-top: 2px; }
.faq-block p { margin: 4px 0 0; }

/* ---------- Pie de página profesional / Dark Slate Modern Footer ---------- */
.site-footer {
  background: #090e1a;
  color: #94a3b8;
  border-top: 1px solid #1e293b;
  margin-top: 56px;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 25%;
  width: 500px;
  height: 250px;
  background: radial-gradient(ellipse at top, rgba(37, 99, 235, 0.12), transparent 70%);
  pointer-events: none;
}
.footer-inner {
  padding: 48px 20px 24px;
  position: relative;
  z-index: 1;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.7fr 1.1fr 1.1fr 1.3fr;
  gap: 36px 28px;
  margin-bottom: 38px;
}
/* Brand column */
.footer-brand {
  margin-bottom: 12px;
}
.footer-brand .brand-name {
  color: #ffffff;
}
.footer-brand .brand-highlight {
  color: #60a5fa;
  -webkit-text-fill-color: #60a5fa;
}
.footer-desc {
  font-size: 0.91rem;
  line-height: 1.65;
  color: #94a3b8;
  margin: 0 0 16px;
  max-width: 320px;
}
.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  background: rgba(30, 41, 59, 0.75);
  border: 1px solid rgba(51, 65, 85, 0.8);
  border-radius: 8px;
  font-size: 0.82rem;
  color: #cbd5e1;
  backdrop-filter: blur(8px);
}
.footer-badge svg {
  flex-shrink: 0;
  color: #38bdf8;
}

/* Nav columns */
.footer-col-title {
  color: #f8fafc;
  font-size: 0.84rem;
  font-weight: 700;
  margin: 0 0 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-col-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3b82f6;
}
.footer-links-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.footer-links-list a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.91rem;
  transition: all 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links-list a:hover {
  color: #60a5fa;
  transform: translateX(4px);
}

/* Formulas column */
.footer-formulas-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.footer-formula-item {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(51, 65, 85, 0.7);
  border-radius: 6px;
  padding: 7px 11px;
}
.formula-item-name {
  display: block;
  font-size: 0.73rem;
  font-weight: 700;
  color: #38bdf8;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}
.formula-item-code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.81rem;
  color: #e2e8f0;
}

/* Bottom copyright bar */
.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: #64748b;
}
.footer-bottom a {
  color: #94a3b8;
  text-decoration: none;
}
.footer-bottom a:hover {
  color: #cbd5e1;
}
.footer-copy strong {
  color: #e2e8f0;
}
.footer-disclaimer {
  color: #64748b;
  font-size: 0.82rem;
  margin: 0;
}

/* Fallback for legacy simple footer */
.footer-inner > p { margin: 0 0 8px; color: #cbd5e1; }
.footer-inner > p strong { color: #f8fafc; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; list-style: none; margin: 10px 0 0; padding: 0; }
.footer-links a { color: #94a3b8; text-decoration: none; font-size: 0.92rem; }
.footer-links a:hover { color: #60a5fa; }
.footer-note { color: #64748b; font-size: 0.84rem; margin: 6px 0 0; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }
}
@media (max-width: 860px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 10px;
    padding-bottom: 10px;
    gap: 10px;
  }
  .site-nav {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin: 0 -20px;
    padding: 2px 20px 4px;
  }
  .site-nav::-webkit-scrollbar {
    display: none;
  }
  .nav-list {
    flex-wrap: nowrap;
    gap: 6px;
    width: max-content;
  }
  .nav-list a {
    padding: 6px 12px;
    font-size: 0.88rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
  }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .field, .field-small { flex-basis: 100%; }
  .hero h1 { font-size: 2.1rem; }
  .page-hero h1 { font-size: 2rem; }
  .calculator, .tool-card { padding: 18px; }
  .result-main { font-size: 1.3rem; }
  .article table { display: block; overflow-x: auto; white-space: nowrap; }
}
@media (max-width: 580px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}
@media (max-width: 520px) {
  .tools-grid { grid-template-columns: 1fr; }
}

/* ---------- Titulares centrados + la herramienta como protagonista ---------- */
.hero, .page-hero { text-align: center; }
.hero .lede, .page-hero .lede { margin-left: auto; margin-right: auto; }
.result { background: #fff; border: 1.5px solid #c7d6ee; }
.result-main { font-size: 1.8rem; }

/* ---------- Ajustes específicos para Móviles (Screenshot 2) ---------- */
@media (max-width: 680px) {
  .calculator, .tool-card {
    padding: 20px 14px 22px;
    margin-top: 16px;
    border-radius: 12px;
  }
  .calc-heading {
    margin: -20px -14px 18px;
    padding: 14px 16px;
    font-size: 1.15rem;
    border-radius: 10px 10px 0 0;
  }
  /* Cuadrícula organizada 2x2 para que los botones no se desordenen en móvil */
  .tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 8px;
    background: #edf3fc;
    border: 1.5px solid #c7d6ee;
    border-radius: 10px;
    margin-bottom: 0;
  }
  .tabs button,
  .tabs a.tab-link {
    font-size: 0.86rem;
    padding: 11px 8px;
    text-align: center;
    white-space: normal;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    line-height: 1.25;
    min-height: 52px;
    border-radius: 8px;
    text-decoration: none;
  }
  .tabs button:last-child:nth-child(odd),
  .tabs a.tab-link:last-child:nth-child(odd) {
    grid-column: span 2;
  }
  .tabs button:not([aria-selected="true"]),
  .tabs a.tab-link:not(.active) {
    background: #ffffff;
    border: 1px solid #d5e0f0;
    color: #334155;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  }
  .tabs button:not([aria-selected="true"]):hover,
  .tabs a.tab-link:not(.active):hover {
    background: #f1f6fd;
    color: var(--blue-dark);
    border-color: #bfdbfe;
  }
  .tabs button[aria-selected="true"],
  .tabs a.tab-link.active {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%) !important;
    color: #ffffff !important;
    border-color: #1d4ed8 !important;
    box-shadow: 0 3px 10px rgba(37, 99, 235, 0.35);
  }
  .tabs button[aria-selected="true"]:hover,
  .tabs a.tab-link.active:hover {
    background: #1e40af !important;
    color: #ffffff !important;
    border-color: #1e40af !important;
  }
  /* Botones de acción en móvil (Calcular / Limpiar) */
  .actions {
    display: flex;
    gap: 10px;
    width: 100%;
    margin-top: 16px;
  }
  .actions .btn {
    flex: 1;
    padding: 13px 16px;
    font-size: 1rem;
    justify-content: center;
    text-align: center;
  }
  .actions .btn-primary {
    flex: 1.4;
  }
  .input-wrap input, .input-wrap select, .field > input, .field > select {
    padding: 11px 12px;
    font-size: 1rem;
  }
}

@media (max-width: 360px) {
  .tabs {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .tabs button,
  .tabs a.tab-link {
    min-height: 44px;
    padding: 9px 8px;
  }
  .tabs button:last-child:nth-child(odd),
  .tabs a.tab-link:last-child:nth-child(odd) {
    grid-column: span 1;
  }
}

/* ---------- Pestañas inferiores (Bottom Tabs) ---------- */
.tabs-bottom-wrap {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1.5px dashed #cbd5e1;
}
.tabs-label {
  text-align: center;
  font-weight: 700;
  font-size: 0.96rem;
  color: var(--blue-dark);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.tabs-label::before,
.tabs-label::after {
  content: "";
  display: inline-block;
  height: 1px;
  width: 32px;
  background: #cbd5e1;
}
@media (max-width: 680px) {
  .tabs-bottom-wrap {
    margin-top: 22px;
    padding-top: 18px;
  }
  .tabs-label {
    font-size: 0.88rem;
    margin-bottom: 12px;
  }
}

/* ---------- Tarjetas y guías de herramientas adicionales ---------- */
.excel-formulas-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.excel-card {
  background: #ffffff;
  border: 1px solid #d5e0f0;
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}
.excel-card strong {
  color: var(--blue-dark);
  font-size: 1.02rem;
}
.excel-card p {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.45;
}
.excel-card .formula {
  background: #0f172a;
  color: #38bdf8;
  padding: 10px 14px;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.98rem;
  font-weight: 600;
  display: block;
  user-select: all;
  margin: 4px 0;
}
.excel-card .formula code {
  color: inherit;
  background: transparent;
  padding: 0;
}
.excel-card .formula-note {
  font-size: 0.82rem;
  color: #64748b;
  font-style: italic;
}
.tool-guide-link {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px dashed #cbd5e1;
  font-size: 0.95rem;
}
.tool-guide-link a {
  color: var(--blue);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.2s ease;
}
.tool-guide-link a:hover {
  color: var(--blue-dark);
  text-decoration: underline;
}
.m5-del-row {
  align-self: flex-end;
  height: 44px;
  width: 44px;
  min-width: 44px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  color: #dc2626 !important;
  border-color: #fecaca;
  background: #ffffff;
  border-radius: 6px;
  margin-bottom: 2px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
.m5-del-row:hover {
  background: #fee2e2 !important;
  color: #991b1b !important;
  border-color: #fca5a5 !important;
}