/* ============================================================
   CALCULARIO — Hoja de estilos principal
   Base neutra (slate) + acento esmeralda. Sin librerías.
   ============================================================ */

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --text: #0f172a;
  --text-soft: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --accent: #059669;
  --accent-hover: #047857;
  --accent-soft: #ecfdf5;
  --accent-ring: rgba(5, 150, 105, 0.18);
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow: 0 10px 30px -12px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 24px 50px -20px rgba(15, 23, 42, 0.18);
  --maxw: 1120px;
  --font-display: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.1; letter-spacing: -0.02em; color: var(--text); }

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

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

.contenedor { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Cabecera ---------- */
.cabecera {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.cabecera-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; color: var(--text); letter-spacing: -0.03em; }
.logo:hover { color: var(--text); }
.logo-mark {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(140deg, var(--accent), #10b981);
  display: grid; place-items: center; color: #fff; box-shadow: var(--shadow-sm);
}
.logo-mark svg { width: 20px; height: 20px; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--text-soft); font-weight: 500; font-size: 0.95rem;
  padding: 8px 14px; border-radius: 10px; transition: background .15s, color .15s;
}
.nav a:hover { background: var(--surface-2); color: var(--text); }

.menu-btn { display: none; background: none; border: 1px solid var(--border); border-radius: 10px; width: 42px; height: 42px; cursor: pointer; align-items: center; justify-content: center; }
.menu-btn svg { width: 22px; height: 22px; color: var(--text); }

@media (max-width: 760px) {
  .nav {
    position: fixed; inset: 64px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--surface); border-bottom: 1px solid var(--border);
    padding: 12px 20px 20px; transform: translateY(-130%);
    transition: transform .28s cubic-bezier(.4,0,.2,1); box-shadow: var(--shadow);
  }
  .nav.abierto { transform: translateY(0); }
  .nav a { padding: 12px 14px; }
  .menu-btn { display: flex; }
}

/* ---------- Hero ---------- */
.hero { padding: 64px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.4rem, 5vw, 3.75rem); font-weight: 700; }
.hero h1 .resalte { color: var(--accent); }
.hero p { margin-top: 18px; font-size: 1.15rem; color: var(--text-soft); max-width: 52ch; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: 0.85rem; font-weight: 600;
  color: var(--accent-hover); background: var(--accent-soft); border: 1px solid #a7f3d0;
  padding: 6px 14px; border-radius: 999px; margin-bottom: 20px;
}
.hero-badge span { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-ring); }

/* Buscador */
.buscador { margin-top: 28px; position: relative; max-width: 460px; }
.buscador input {
  width: 100%; padding: 16px 18px 16px 50px; font-size: 1rem; font-family: var(--font-body);
  border: 1px solid var(--border); border-radius: 14px; background: var(--surface);
  box-shadow: var(--shadow-sm); transition: border-color .15s, box-shadow .15s;
}
.buscador input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-ring); }
.buscador svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: var(--text-muted); }

/* Tarjeta visual del hero */
.hero-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.hero-card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(120% 100% at 100% 0%, var(--accent-soft), transparent 60%); pointer-events: none; }
.hero-card .pantalla {
  background: var(--text); color: #ecfdf5; border-radius: 14px; padding: 18px 20px;
  font-family: "SFMono-Regular", Consolas, monospace; font-size: 2rem; text-align: right;
  letter-spacing: 0.02em; position: relative;
}
.hero-card .pantalla small { display: block; font-size: 0.8rem; color: #6ee7b7; text-align: left; margin-bottom: 6px; letter-spacing: 0; }
.tecla-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 16px; position: relative; }
.tecla { background: var(--surface-2); border: 1px solid var(--border); border-radius: 12px; height: 52px; display: grid; place-items: center; font-weight: 600; color: var(--text-soft); font-size: 1.1rem; transition: transform .1s, background .15s; cursor: default; }
.tecla.op { background: var(--accent-soft); color: var(--accent-hover); }
.tecla.eq { background: var(--accent); color: #fff; }

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding: 40px 0 24px; }
  .hero-card { display: none; }
}

/* ---------- Secciones / categorías ---------- */
.seccion { padding: 40px 0; }
.seccion-cab { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.seccion-cab h2 { font-size: 1.6rem; font-weight: 700; }
.seccion-cab .pildora { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); background: var(--surface-2); padding: 4px 10px; border-radius: 999px; }
.cat-icono { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; flex-shrink: 0; }
.cat-icono svg { width: 22px; height: 22px; }
.cat-finanzas { background: #ecfdf5; color: #059669; }
.cat-salud { background: #fef2f2; color: #e11d48; }
.cat-mate { background: #eff6ff; color: #2563eb; }
.cat-fecha { background: #fefce8; color: #ca8a04; }
.cat-conv { background: #ecfeff; color: #0891b2; }

/* Rejilla de calculadoras */
.rejilla { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 880px) { .rejilla { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .rejilla { grid-template-columns: 1fr; } }

.tarjeta {
  display: flex; align-items: flex-start; gap: 14px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; transition: transform .15s, box-shadow .15s, border-color .15s; box-shadow: var(--shadow-sm);
}
.tarjeta:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cbd5e1; }
.tarjeta:active { transform: translateY(-1px) scale(0.99); }
.tarjeta .ti { width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center; flex-shrink: 0; background: var(--surface-2); color: var(--accent); }
.tarjeta .ti svg { width: 22px; height: 22px; }
.tarjeta h3 { font-size: 1.05rem; font-weight: 600; color: var(--text); }
.tarjeta p { font-size: 0.88rem; color: var(--text-soft); margin-top: 2px; }
.tarjeta-link { color: inherit; }
.tarjeta-link:hover { color: inherit; }

/* ---------- Layout de páginas de calculadora ---------- */
.breadcrumb { font-size: 0.85rem; color: var(--text-muted); padding: 20px 0 6px; }
.breadcrumb a { color: var(--text-soft); }
.calc-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 32px; padding: 12px 0 60px; align-items: start; }
@media (max-width: 940px) { .calc-layout { grid-template-columns: 1fr; } .sidebar { order: 3; } }

.calc-cab h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 700; }
.calc-cab p.lead { margin-top: 12px; font-size: 1.1rem; color: var(--text-soft); max-width: 60ch; }

/* Caja de la calculadora */
.calc-box {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; margin-top: 26px; box-shadow: var(--shadow);
}
.campos { display: grid; gap: 18px; }
.campos.dos { grid-template-columns: 1fr 1fr; }
@media (max-width: 520px) { .campos.dos { grid-template-columns: 1fr; } }

.campo label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 7px; color: var(--text); }
.campo .input-wrap { position: relative; display: flex; align-items: center; }
.campo input, .campo select {
  width: 100%; padding: 13px 14px; font-size: 1rem; font-family: var(--font-body);
  border: 1px solid var(--border); border-radius: 12px; background: var(--surface); color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.campo input:focus, .campo select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-ring); }
.campo .sufijo { position: absolute; right: 14px; color: var(--text-muted); font-weight: 600; font-size: 0.9rem; pointer-events: none; }
.campo .pista { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }

.radios { display: flex; gap: 8px; flex-wrap: wrap; }
.radios label {
  flex: 1; min-width: 110px; text-align: center; padding: 11px 12px; border: 1px solid var(--border);
  border-radius: 12px; cursor: pointer; font-weight: 500; font-size: 0.92rem; color: var(--text-soft);
  transition: all .15s; margin-bottom: 0;
}
.radios input { position: absolute; opacity: 0; }
.radios input:checked + span { color: var(--accent-hover); }
.radios label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-hover); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: #fff; font-weight: 600; font-size: 1rem; font-family: var(--font-body);
  border: none; border-radius: 12px; padding: 14px 24px; cursor: pointer; width: 100%;
  transition: background .15s, transform .1s, box-shadow .15s; box-shadow: var(--shadow-sm);
}
.btn:hover { background: var(--accent-hover); }
.btn:active { transform: scale(0.98); }
.btn.sec { background: var(--surface-2); color: var(--text); }
.btn.sec:hover { background: #e2e8f0; }
.btn-fila { display: flex; gap: 12px; margin-top: 6px; }

/* Resultado */
.resultado {
  margin-top: 22px; border-radius: var(--radius); padding: 24px; background: var(--accent-soft);
  border: 1px solid #a7f3d0; display: none;
}
.resultado.visible { display: block; animation: aparecer .35s ease; }
@keyframes aparecer { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.resultado .etq { font-size: 0.85rem; font-weight: 600; color: var(--accent-hover); text-transform: uppercase; letter-spacing: 0.04em; }
.resultado .valor { font-family: var(--font-display); font-size: clamp(2rem, 6vw, 2.8rem); font-weight: 700; color: var(--text); margin-top: 4px; }
.resultado .detalle { margin-top: 14px; color: var(--text-soft); font-size: 0.95rem; }
.resultado .grid-detalle { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.resultado .grid-detalle > div { background: rgba(255,255,255,0.6); border-radius: 12px; padding: 12px 14px; }
.resultado .grid-detalle .k { font-size: 0.8rem; color: var(--text-soft); }
.resultado .grid-detalle .v { font-size: 1.15rem; font-weight: 700; color: var(--text); font-family: var(--font-display); }

.badge-cat { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 600; padding: 5px 11px; border-radius: 999px; margin-bottom: 14px; }

/* Contenido SEO bajo la calculadora */
.contenido-seo { margin-top: 48px; max-width: 70ch; }
.contenido-seo h2 { font-size: 1.5rem; font-weight: 700; margin: 36px 0 14px; }
.contenido-seo h3 { font-size: 1.15rem; font-weight: 600; margin: 26px 0 10px; }
.contenido-seo p { color: var(--text-soft); margin-bottom: 14px; }
.contenido-seo ul, .contenido-seo ol { color: var(--text-soft); margin: 0 0 14px 22px; }
.contenido-seo li { margin-bottom: 6px; }
.contenido-seo .formula { background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 10px; padding: 16px 18px; font-family: "SFMono-Regular", Consolas, monospace; color: var(--text); margin: 16px 0; overflow-x: auto; }
.contenido-seo table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.92rem; }
.contenido-seo th, .contenido-seo td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.contenido-seo th { font-weight: 600; color: var(--text); background: var(--surface-2); }
.contenido-seo td { color: var(--text-soft); }

/* FAQ */
.faq details { border: 1px solid var(--border); border-radius: 12px; margin-bottom: 10px; background: var(--surface); overflow: hidden; }
.faq summary { padding: 16px 18px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; color: var(--text); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.4rem; color: var(--accent); font-weight: 400; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 18px 18px; color: var(--text-soft); margin: 0; }

/* ---------- Sidebar ---------- */
.sidebar { display: flex; flex-direction: column; gap: 20px; position: sticky; top: 84px; }
.sidebar-box { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.sidebar-box h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 12px; }
.sidebar-lista a { display: flex; align-items: center; gap: 10px; padding: 9px 0; color: var(--text-soft); font-size: 0.93rem; font-weight: 500; border-bottom: 1px solid var(--border); }
.sidebar-lista a:last-child { border-bottom: none; }
.sidebar-lista a:hover { color: var(--accent); }
.sidebar-lista svg { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.7; }

/* ---------- Bloques de anuncios (AdSense) ---------- */
.anuncio {
  margin: 28px 0; min-height: 100px; border-radius: var(--radius);
  display: grid; place-items: center; overflow: hidden;
}
.anuncio-placeholder {
  width: 100%; min-height: 100px; border: 1px dashed #cbd5e1; border-radius: var(--radius);
  display: grid; place-items: center; color: var(--text-muted); font-size: 0.82rem;
  background: repeating-linear-gradient(45deg, #f8fafc, #f8fafc 12px, #f1f5f9 12px, #f1f5f9 24px);
  text-align: center; padding: 16px;
}
.anuncio-etq { font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); text-align: center; margin-bottom: 4px; }

/* ---------- Footer ---------- */
.footer { background: var(--text); color: #cbd5e1; margin-top: 60px; padding: 48px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; } }
.footer .logo { color: #fff; }
.footer p.desc { margin-top: 12px; color: #94a3b8; font-size: 0.92rem; max-width: 34ch; }
.footer h5 { color: #fff; font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; font-family: var(--font-display); }
.footer-col a { display: block; color: #94a3b8; padding: 6px 0; font-size: 0.92rem; }
.footer-col a:hover { color: #fff; }
.footer-base { margin-top: 36px; padding-top: 22px; border-top: 1px solid #1e293b; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: #64748b; font-size: 0.85rem; }

/* ---------- Páginas legales / contenido genérico ---------- */
.pagina { max-width: 760px; margin: 0 auto; padding: 40px 0 60px; }
.pagina h1 { font-size: 2.2rem; font-weight: 700; margin-bottom: 8px; }
.pagina .actualizado { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 24px; }
.pagina h2 { font-size: 1.35rem; font-weight: 700; margin: 30px 0 12px; }
.pagina p, .pagina li { color: var(--text-soft); margin-bottom: 12px; }
.pagina ul { margin-left: 22px; }

/* Utilidades */
.oculto { display: none !important; }
.error-text { color: var(--danger); font-size: 0.85rem; margin-top: 6px; }
.centro { text-align: center; }

/* ---------- Banner de cookies (RGPD) ---------- */
.cookie-banner {
  position: fixed; left: 16px; bottom: 16px; z-index: 200;
  width: calc(100% - 32px); max-width: 440px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 20px 22px;
  transform: translateY(150%); opacity: 0; transition: transform .4s cubic-bezier(.4,0,.2,1), opacity .4s;
}
.cookie-banner.visible { transform: translateY(0); opacity: 1; }
.cookie-banner h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.cookie-banner h4 svg { width: 20px; height: 20px; color: var(--accent); }
.cookie-banner p { font-size: 0.88rem; color: var(--text-soft); margin-bottom: 16px; }
.cookie-banner p a { font-weight: 600; }
.cookie-acciones { display: flex; gap: 10px; }
.cookie-acciones .btn { width: auto; flex: 1; padding: 11px 16px; font-size: 0.92rem; }
@media (max-width: 480px) { .cookie-banner { left: 12px; bottom: 12px; width: calc(100% - 24px); padding: 18px; } }