/* ============================================================
   TuSueldoUS — estilos (mobile-first, sin dependencias externas)
   ============================================================ */

:root {
  --verde: #0e7a4a;
  --verde-oscuro: #0a5c39;
  --azul: #1d4ed8;
  --tinta: #1a2330;
  --tinta-suave: #52607a;
  --fondo: #f6f8fa;
  --tarjeta: #ffffff;
  --borde: #e3e8ef;
  --amarillo: #fef3c7;
  --radio: 14px;
  --sombra: 0 1px 3px rgba(16, 24, 40, 0.08);
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--tinta);
  background: var(--fondo);
  line-height: 1.6;
}

img { max-width: 100%; }

a { color: var(--verde); }
a:hover { color: var(--verde-oscuro); }

/* ---------- Cabecera ---------- */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--borde);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header .inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.logo {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--verde);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.logo span { color: var(--tinta); }

nav.principal {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
nav.principal a {
  color: var(--tinta-suave);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 8px;
}
nav.principal a:hover { background: var(--fondo); color: var(--tinta); }
nav.principal a.activo { color: var(--verde); background: #e8f5ee; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--verde-oscuro), var(--verde));
  color: #ffffff;
  padding: 48px 20px 56px;
  text-align: center;
}
.hero h1 {
  margin: 0 auto 12px;
  max-width: 720px;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.hero p {
  margin: 0 auto;
  max-width: 640px;
  font-size: 1.05rem;
  opacity: 0.94;
}

/* ---------- Contenido ---------- */
main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 48px;
}

main article { max-width: 760px; margin: 0 auto; }

h2 { font-size: 1.45rem; margin: 2.2em 0 0.5em; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; margin: 1.6em 0 0.4em; }

.tarjeta {
  background: var(--tarjeta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 24px;
  box-shadow: var(--sombra);
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin: 24px 0;
}

.tarjeta-enlace {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--tarjeta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 20px;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.tarjeta-enlace:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(16, 24, 40, 0.10);
  color: inherit;
}
.tarjeta-enlace h3 { margin: 0 0 6px; font-size: 1.05rem; color: var(--verde); }
.tarjeta-enlace p { margin: 0; font-size: 0.92rem; color: var(--tinta-suave); }

.etiqueta {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--verde);
  background: #e8f5ee;
  padding: 3px 8px;
  border-radius: 999px;
  margin-bottom: 8px;
}

/* ---------- Formulario de calculadora ---------- */
.calc-form {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.calc-form .campo { display: flex; flex-direction: column; gap: 6px; }
.calc-form .campo.amplio { grid-column: 1 / -1; }
.calc-form label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--tinta-suave);
}
.calc-form input, .calc-form select {
  font: inherit;
  padding: 10px 12px;
  border: 1.5px solid var(--borde);
  border-radius: 10px;
  background: #fff;
  color: var(--tinta);
  min-height: 44px; /* toque móvil */
}
.calc-form input:focus, .calc-form select:focus {
  outline: none;
  border-color: var(--verde);
  box-shadow: 0 0 0 3px rgba(14, 122, 74, 0.15);
}

.boton {
  display: inline-block;
  font: inherit;
  font-weight: 700;
  background: var(--verde);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 12px 22px;
  min-height: 48px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}
.boton:hover { background: var(--verde-oscuro); }
.boton:active { transform: translateY(1px); }

/* Botón secundario (compartir resultados) */
.boton-secundario {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  background: #fff;
  color: var(--verde);
  border: 2px solid var(--verde);
  border-radius: 10px;
  padding: 9px 18px;
  min-height: 44px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  margin-top: 14px;
}
.boton-secundario:hover { background: #e8f5ee; }
.destacado .boton-secundario {
  background: rgba(255, 255, 255, 0.95);
  color: var(--verde-oscuro);
  border-color: #fff;
}

/* ---------- Resultados ---------- */
.resultado { margin-top: 24px; }
.resultado .destacado {
  background: linear-gradient(135deg, #0a5c39, #0e7a4a);
  color: #fff;
  border-radius: var(--radio);
  padding: 20px 24px;
  margin-bottom: 16px;
}
.resultado .destacado .cifra {
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.resultado .destacado .leyenda {
  font-size: 0.9rem;
  opacity: 0.9;
}

.tabla-desglose {
  width: 100%;
  border-collapse: collapse;
  background: var(--tarjeta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  overflow: hidden;
}
.tabla-desglose th, .tabla-desglose td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--borde);
  font-size: 0.95rem;
}
.tabla-desglose th { color: var(--tinta-suave); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.tabla-desglose tr:last-child td { border-bottom: none; font-weight: 700; }
.tabla-desglose td.num, .tabla-desglose th.num { text-align: right; font-variant-numeric: tabular-nums; }
.tabla-desglose tr.neg td { color: #b42318; }

.dos-colores {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}
.mini-tarjeta {
  background: var(--tarjeta);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  padding: 16px 20px;
  text-align: center;
}
.mini-tarjeta .cifra { font-size: 1.5rem; font-weight: 800; color: var(--verde); }
.mini-tarjeta .leyenda { font-size: 0.85rem; color: var(--tinta-suave); }

/* ---------- Avisos ---------- */
.aviso {
  background: var(--amarillo);
  border: 1px solid #fde68a;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 0.9rem;
  margin: 20px 0;
}

/* ---------- FAQ ---------- */
details.faq {
  background: var(--tarjeta);
  border: 1px solid var(--borde);
  border-radius: 10px;
  padding: 14px 18px;
  margin: 10px 0;
}
details.faq summary {
  font-weight: 700;
  cursor: pointer;
  font-size: 1rem;
}
details.faq p { margin: 10px 0 0; color: var(--tinta-suave); font-size: 0.95rem; }

/* ---------- Espacio publicitario ---------- */
.ad-slot {
  margin: 28px auto;
  padding: 12px;
  border: 1px dashed var(--borde);
  border-radius: 10px;
  text-align: center;
  color: #9aa4b2;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: #fbfcfd;
}

/* ---------- Migas ---------- */
.migas {
  font-size: 0.85rem;
  color: var(--tinta-suave);
  margin-bottom: 8px;
}
.migas a { text-decoration: none; }

/* ---------- Pie ---------- */
.site-footer {
  background: #101826;
  color: #b7c2d4;
  padding: 36px 20px;
  font-size: 0.88rem;
}
.site-footer .inner {
  max-width: 1080px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.site-footer h4 { color: #fff; margin: 0 0 8px; font-size: 0.95rem; }
.site-footer a { color: #b7c2d4; text-decoration: none; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.site-footer .copy {
  max-width: 1080px;
  margin: 24px auto 0;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.12);
  text-align: center;
  color: #7c8aa0;
}

@media (max-width: 480px) {
  .tarjeta { padding: 18px; }
}