/* ==========================================================================
   infautónomo.es — Sistema de diseño
   Identidad editorial · Ink navy + Emerald + Sand
   ========================================================================== */

:root{
  /* Paleta */
  --ink:        #0E1B2C;   /* fondo oscuro principal */
  --ink-2:      #14263f;   /* fondo oscuro secundario */
  --emerald:    #1FA97A;   /* acento / marca */
  --emerald-d:  #157a58;   /* acento oscuro (hover) */
  --gold:       #E8B04B;   /* acento cálido secundario */
  --sand:       #F7F3EC;   /* fondo claro contenido */
  --paper:      #FFFFFF;
  --line:       #E4DCCB;   /* bordes sobre sand */
  --line-dark:  rgba(255,255,255,.12);

  --text:       #16202B;   /* texto principal sobre claro */
  --text-soft:  #4a5866;   /* texto secundario */
  --text-inv:   #EAF1F8;   /* texto sobre oscuro */
  --text-inv-s: #9db2c7;   /* texto secundario sobre oscuro */

  /* Tipografía */
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  /* Medidas */
  --maxw: 1180px;
  --measure: 68ch;         /* ancho ideal de lectura */
  --radius: 14px;
  --radius-s: 10px;
  --shadow: 0 18px 50px -20px rgba(14,27,44,.35);
  --shadow-s: 0 6px 20px -10px rgba(14,27,44,.25);
  --gutter: clamp(20px, 5vw, 64px);
}

/* ---------- Reset ligero ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  font-family:var(--sans);
  color:var(--text);
  background:var(--sand);
  line-height:1.7;
  font-size:clamp(16px,1.05vw,18px);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{ max-width:100%; display:block; }
a{ color:var(--emerald-d); text-decoration:none; }
a:hover{ text-decoration:underline; }

/* ---------- Tipografía ---------- */
h1,h2,h3,h4{ font-family:var(--serif); font-weight:600; line-height:1.12; color:var(--ink); margin:0 0 .5em; letter-spacing:-.01em; }
h1{ font-size:clamp(2.3rem,5.5vw,4.2rem); }
h2{ font-size:clamp(1.8rem,3.6vw,2.7rem); }
h3{ font-size:clamp(1.25rem,2.2vw,1.6rem); }
p{ margin:0 0 1.1em; }
.lead{ font-size:clamp(1.1rem,1.6vw,1.35rem); color:var(--text-soft); line-height:1.6; }
strong{ color:var(--ink); }

/* ---------- Layout ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin-inline:auto; padding-inline:var(--gutter); }
.section{ padding-block:clamp(56px,9vw,120px); }
.eyebrow{
  display:inline-block; font-family:var(--sans); font-weight:700;
  font-size:.78rem; letter-spacing:.18em; text-transform:uppercase;
  color:var(--emerald-d); margin-bottom:1rem;
}
.on-dark .eyebrow{ color:var(--gold); }

/* ---------- Botones ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.55em;
  font-family:var(--sans); font-weight:600; font-size:.98rem;
  padding:.85em 1.5em; border-radius:100px; border:1.5px solid transparent;
  cursor:pointer; transition:transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  text-decoration:none;
}
.btn:hover{ text-decoration:none; transform:translateY(-2px); }
.btn-primary{ background:var(--emerald); color:#fff; }
.btn-primary:hover{ background:var(--emerald-d); color:#fff; }
.btn-ghost{ background:transparent; color:var(--ink); border-color:var(--line); }
.on-dark .btn-ghost{ color:var(--text-inv); border-color:var(--line-dark); }
.on-dark .btn-ghost:hover{ background:rgba(255,255,255,.08); }
.btn-arrow::after{ content:"→"; transition:transform .2s ease; }
.btn:hover .btn-arrow::after{ transform:translateX(3px); }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(247,243,236,.82);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{ display:flex; align-items:center; justify-content:space-between; height:68px; gap:1.5rem; }
.brand{ font-family:var(--serif); font-weight:600; font-size:1.32rem; color:var(--ink); letter-spacing:-.02em; display:flex; align-items:center; gap:.5ch; }
.brand:hover{ text-decoration:none; }
.brand .dot{ color:var(--emerald); }
.nav-links{ display:flex; gap:.4rem; align-items:center; list-style:none; margin:0; padding:0; }
.nav-links a{
  color:var(--text); font-weight:500; font-size:.96rem;
  padding:.5em .9em; border-radius:100px; transition:background .2s ease, color .2s ease;
}
.nav-links a:hover{ background:rgba(14,27,44,.06); text-decoration:none; }
.nav-links a[aria-current="page"]{ color:var(--emerald-d); font-weight:600; }
.nav-toggle{ display:none; background:none; border:0; cursor:pointer; padding:.4em; }
.nav-toggle span{ display:block; width:24px; height:2px; background:var(--ink); margin:5px 0; transition:.25s; border-radius:2px; }

@media (max-width:820px){
  .nav-toggle{ display:block; }
  .nav-links{
    position:absolute; top:68px; left:0; right:0; flex-direction:column; gap:0;
    background:var(--sand); border-bottom:1px solid var(--line);
    padding:.5rem var(--gutter) 1.2rem; align-items:stretch;
    max-height:0; overflow:hidden; transition:max-height .3s ease; box-shadow:var(--shadow-s);
  }
  .nav.open .nav-links{ max-height:420px; }
  .nav-links a{ padding:.85em .4em; border-bottom:1px solid var(--line); border-radius:0; }
  .nav.open .nav-toggle span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
  .nav.open .nav-toggle span:nth-child(2){ opacity:0; }
  .nav.open .nav-toggle span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }
}

/* ==========================================================================
   Secciones oscuras
   ========================================================================== */
.on-dark{ background:var(--ink); color:var(--text-inv); }
.on-dark h1,.on-dark h2,.on-dark h3{ color:#fff; }
.on-dark p{ color:var(--text-inv-s); }
.on-dark .lead{ color:var(--text-inv-s); }

/* ==========================================================================
   HERO (home)
   ========================================================================== */
.hero{
  position:relative; overflow:hidden;
  background:radial-gradient(120% 120% at 80% -10%, #1b3a5c 0%, var(--ink) 55%);
  color:var(--text-inv); padding-block:clamp(90px,15vh,160px);
}
.hero::after{
  content:""; position:absolute; inset:0; pointer-events:none;
  background:
    radial-gradient(60% 50% at 15% 110%, rgba(31,169,122,.22), transparent 70%),
    radial-gradient(40% 40% at 95% 20%, rgba(232,176,75,.14), transparent 70%);
}
.hero .wrap{ position:relative; z-index:2; }
.hero h1{ color:#fff; max-width:16ch; }
.hero h1 .accent{ color:var(--emerald); }
.hero .lead{ max-width:56ch; margin-top:.4em; }
/* Botón fantasma sobre el fondo oscuro del hero: texto claro y borde tenue */
.hero .btn-ghost{ color:var(--text-inv); border-color:var(--line-dark); }
.hero .btn-ghost:hover{ background:rgba(255,255,255,.08); color:#fff; }
.hero-cta{ display:flex; flex-wrap:wrap; gap:.9rem; margin-top:2rem; }
.hero-meta{ display:flex; flex-wrap:wrap; gap:1.8rem; margin-top:3rem; padding-top:1.6rem; border-top:1px solid var(--line-dark); }
.hero-meta div{ min-width:120px; }
.hero-meta .num{ font-family:var(--serif); font-size:1.8rem; color:var(--gold); line-height:1; }
.hero-meta .lbl{ font-size:.86rem; color:var(--text-inv-s); margin-top:.35em; }

/* ==========================================================================
   Parallax showcase (solo home)
   ========================================================================== */
.showcase{ background:var(--ink-2); position:relative; }
.showcase .intro{ text-align:center; max-width:60ch; margin:0 auto clamp(30px,6vw,70px); }
.parallax-track{ display:flex; flex-direction:column; gap:clamp(60px,12vw,160px); }
.parallax-item{
  display:grid; grid-template-columns:1fr 1fr; gap:clamp(24px,5vw,64px); align-items:center;
}
.parallax-item:nth-child(even) .parallax-figure{ order:2; }
.parallax-figure{
  position:relative; border-radius:var(--radius); overflow:hidden;
  aspect-ratio:3/2; background:var(--ink); box-shadow:var(--shadow);
  will-change:transform;
}
.parallax-figure img{
  width:100%; height:100%; object-fit:cover;
  /* estado inicial del efecto (por si el JS tarda o falla, ver .no-js) */
  transform:scale(.7); opacity:0; will-change:transform, opacity;
}
.parallax-copy h3{ color:#fff; }
.parallax-copy p{ color:var(--text-inv-s); max-width:46ch; }
.parallax-copy .tag{ color:var(--gold); font-weight:700; font-size:.8rem; letter-spacing:.15em; text-transform:uppercase; }
.parallax-copy .btn{ margin-top:.6rem; }

/* Fallback: si no hay JS/GSAP, mostramos las imágenes normales */
.no-js .parallax-figure img,
.gsap-failed .parallax-figure img{ transform:none; opacity:1; }

@media (max-width:760px){
  .parallax-item{ grid-template-columns:1fr; }
  .parallax-item:nth-child(even) .parallax-figure{ order:0; }
}

/* ==========================================================================
   Tarjetas pilares
   ========================================================================== */
.pillars{ display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:clamp(18px,2.5vw,28px); }
.pillar{
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  padding:2rem 1.7rem; transition:transform .25s ease, box-shadow .25s ease; position:relative; overflow:hidden;
}
.pillar:hover{ transform:translateY(-5px); box-shadow:var(--shadow); text-decoration:none; }
.pillar .ico{ width:52px; height:52px; border-radius:12px; display:grid; place-items:center; font-size:1.5rem; margin-bottom:1.1rem; background:rgba(31,169,122,.12); }
.pillar h3{ margin-bottom:.35em; }
.pillar p{ color:var(--text-soft); margin-bottom:1rem; }
.pillar .more{ font-weight:600; color:var(--emerald-d); }
@media (max-width:820px){ .pillars{ grid-template-columns:1fr; } }

/* Reveal on scroll */
.reveal{ opacity:0; transform:translateY(24px); transition:opacity .7s ease, transform .7s ease; }
.reveal.in{ opacity:1; transform:none; }
@media (prefers-reduced-motion:reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
}

/* ==========================================================================
   Contenido de artículo (páginas pilar)
   ========================================================================== */
.page-hero{ background:linear-gradient(180deg,#0E1B2C, #14263f); color:var(--text-inv); padding-block:clamp(70px,10vw,110px); }
.page-hero .wrap{ max-width:var(--measure); }
.page-hero h1{ color:#fff; }
.page-hero .lead{ color:var(--text-inv-s); }
.breadcrumb{ font-size:.85rem; color:var(--text-inv-s); margin-bottom:1.4rem; }
.breadcrumb a{ color:var(--text-inv-s); }
.breadcrumb a:hover{ color:#fff; }
.updated{ font-size:.85rem; color:var(--text-inv-s); margin-top:1.4rem; }

.article-layout{ display:grid; grid-template-columns:minmax(0,1fr) 300px; gap:clamp(30px,5vw,64px); align-items:start; }
.prose{ max-width:var(--measure); }
.prose h2{ margin-top:2.2em; scroll-margin-top:90px; }
.prose h3{ margin-top:1.6em; }
.prose ul,.prose ol{ padding-left:1.3em; margin:0 0 1.2em; }
.prose li{ margin-bottom:.5em; }
.prose a{ text-decoration:underline; text-underline-offset:2px; }

.callout{
  background:rgba(31,169,122,.08); border-left:4px solid var(--emerald);
  padding:1.1rem 1.3rem; border-radius:0 var(--radius-s) var(--radius-s) 0; margin:1.6em 0;
}
.callout.warn{ background:rgba(232,176,75,.12); border-left-color:var(--gold); }
.callout p:last-child{ margin-bottom:0; }
.callout strong{ display:block; margin-bottom:.2em; }

/* Tablas de datos (cuotas) */
.table-scroll{ overflow-x:auto; margin:1.6em 0; border:1px solid var(--line); border-radius:var(--radius-s); }
table{ border-collapse:collapse; width:100%; font-size:.96rem; min-width:460px; background:var(--paper); }
thead th{ background:var(--ink); color:#fff; font-family:var(--sans); font-weight:600; text-align:left; padding:.85em 1em; font-size:.9rem; }
tbody td{ padding:.75em 1em; border-top:1px solid var(--line); }
tbody tr:nth-child(even){ background:#faf7f1; }
tbody td strong{ color:var(--emerald-d); }

/* Sidebar / TOC */
.aside{ position:sticky; top:88px; font-size:.94rem; }
.toc{ background:var(--paper); border:1px solid var(--line); border-radius:var(--radius); padding:1.3rem 1.4rem; }
.toc h4{ font-family:var(--sans); text-transform:uppercase; letter-spacing:.12em; font-size:.75rem; color:var(--text-soft); margin-bottom:.8em; }
.toc ul{ list-style:none; margin:0; padding:0; }
.toc li{ margin-bottom:.55em; }
.toc a{ color:var(--text-soft); }
.toc a:hover{ color:var(--emerald-d); text-decoration:none; }
@media (max-width:900px){
  .article-layout{ grid-template-columns:1fr; }
  .aside{ position:static; order:-1; }
}

/* ==========================================================================
   FAQ (accordion)  — genera FAQPage schema
   ========================================================================== */
.faq{ max-width:var(--measure); }
.faq details{ border-bottom:1px solid var(--line); }
.faq summary{
  cursor:pointer; list-style:none; padding:1.15em 2em 1.15em 0; position:relative;
  font-family:var(--serif); font-size:1.15rem; color:var(--ink); font-weight:600;
}
.faq summary::-webkit-details-marker{ display:none; }
.faq summary::after{
  content:"+"; position:absolute; right:.2em; top:50%; transform:translateY(-50%);
  font-size:1.5rem; color:var(--emerald); font-family:var(--sans); transition:transform .25s ease;
}
.faq details[open] summary::after{ transform:translateY(-50%) rotate(45deg); }
.faq details p{ padding:0 0 1.3em; color:var(--text-soft); margin:0; }

/* ==========================================================================
   Ranuras de publicidad (AdSense)
   ========================================================================== */
.ad-slot{
  margin:2.4em auto; max-width:var(--measure); text-align:center;
  min-height:100px; display:flex; flex-direction:column; align-items:center; justify-content:center;
  border:1px dashed var(--line); border-radius:var(--radius-s); background:#faf7f1; color:var(--text-soft);
}
.ad-slot .ad-label{ font-size:.68rem; letter-spacing:.14em; text-transform:uppercase; color:#a99; }
.ad-slot ins{ display:block; }

/* ==========================================================================
   Cards de artículos (blog)
   ========================================================================== */
.card-grid{ display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:clamp(20px,2.5vw,30px); }
.post-card{
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;
  display:flex; flex-direction:column; transition:transform .25s ease, box-shadow .25s ease;
}
.post-card:hover{ transform:translateY(-5px); box-shadow:var(--shadow); text-decoration:none; }
.post-card .thumb{ aspect-ratio:16/9; background:var(--ink-2); overflow:hidden; }
.post-card .thumb img{ width:100%; height:100%; object-fit:cover; }
.post-card .body{ padding:1.4rem 1.5rem 1.6rem; display:flex; flex-direction:column; flex:1; }
.post-card .cat{ font-size:.74rem; letter-spacing:.12em; text-transform:uppercase; color:var(--emerald-d); font-weight:700; margin-bottom:.6em; }
.post-card h3{ font-size:1.25rem; margin-bottom:.4em; }
.post-card p{ color:var(--text-soft); font-size:.95rem; flex:1; }
.post-card .meta{ font-size:.82rem; color:var(--text-soft); margin-top:1rem; }

/* ==========================================================================
   CTA band + Footer
   ========================================================================== */
.cta-band{ background:var(--emerald); color:#fff; text-align:center; }
.cta-band h2{ color:#fff; }
.cta-band p{ color:rgba(255,255,255,.9); max-width:52ch; margin-inline:auto; }
.cta-band .btn-ghost{ color:#fff; border-color:rgba(255,255,255,.6); }
.cta-band .btn-ghost:hover{ background:rgba(255,255,255,.12); }

.site-footer{ background:var(--ink); color:var(--text-inv-s); padding-block:clamp(48px,7vw,80px) 2rem; }
.footer-grid{ display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:2rem; margin-bottom:2.5rem; }
.site-footer .brand{ color:#fff; }
.site-footer h4{ color:#fff; font-family:var(--sans); font-size:.8rem; letter-spacing:.14em; text-transform:uppercase; margin-bottom:1em; }
.site-footer ul{ list-style:none; margin:0; padding:0; }
.site-footer li{ margin-bottom:.55em; }
.site-footer a{ color:var(--text-inv-s); font-size:.94rem; }
.site-footer a:hover{ color:#fff; text-decoration:none; }
.footer-note{ color:var(--text-inv-s); font-size:.9rem; max-width:44ch; margin:1rem 0 0; }
.footer-bottom{ border-top:1px solid var(--line-dark); padding-top:1.6rem; display:flex; flex-wrap:wrap; gap:1rem; justify-content:space-between; font-size:.85rem; color:var(--text-inv-s); }
.footer-bottom a{ color:var(--text-inv-s); }
@media (max-width:820px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:520px){ .footer-grid{ grid-template-columns:1fr; } }

.disclaimer{ font-size:.82rem; color:var(--text-soft); background:#faf7f1; border-top:1px solid var(--line); padding-block:1.6rem; text-align:center; }

/* ==========================================================================
   Calculadora
   ========================================================================== */
.calc-card{
  background:var(--paper); border:1px solid var(--line); border-radius:var(--radius);
  overflow:hidden; margin-bottom:clamp(28px,4vw,44px); box-shadow:var(--shadow-s);
}
.calc-head{ padding:1.4rem clamp(1.3rem,3vw,2rem) 0; }
.calc-head h3{ margin-bottom:.2em; }
.calc-head p{ color:var(--text-soft); margin:0; font-size:.96rem; }
.calc-body{ display:grid; grid-template-columns:1fr 1fr; gap:clamp(20px,4vw,44px); padding:clamp(1.3rem,3vw,2rem); align-items:start; }
@media (max-width:720px){ .calc-body{ grid-template-columns:1fr; } }

.field{ margin-bottom:1.1rem; }
.field:last-child{ margin-bottom:0; }
.field label{ display:block; font-weight:600; font-size:.92rem; color:var(--ink); margin-bottom:.4em; }
.field .hint{ font-weight:400; color:var(--text-soft); font-size:.84rem; }
.input-euro{ position:relative; }
.input-euro::after{ content:"€"; position:absolute; right:.9em; top:50%; transform:translateY(-50%); color:var(--text-soft); font-weight:600; pointer-events:none; }
.field input[type="number"],
.field select{
  width:100%; font-family:var(--sans); font-size:1.05rem; color:var(--text);
  padding:.7em .9em; border:1.5px solid var(--line); border-radius:var(--radius-s);
  background:#fff; transition:border-color .2s ease, box-shadow .2s ease;
}
.field input[type="number"]{ padding-right:2.2em; }
.field input:focus, .field select:focus{ outline:none; border-color:var(--emerald); box-shadow:0 0 0 3px rgba(31,169,122,.15); }
.field .range-row{ display:flex; align-items:center; gap:.8rem; }
.field input[type="range"]{ flex:1; accent-color:var(--emerald); }

.calc-result{ background:var(--ink); color:var(--text-inv); border-radius:var(--radius); padding:clamp(1.3rem,3vw,1.8rem); }
.calc-result .big{ font-family:var(--serif); font-size:clamp(2rem,5vw,2.8rem); color:#fff; line-height:1; margin:.1em 0 .1em; }
.calc-result .big .cur{ font-size:.55em; color:var(--gold); margin-left:.15em; }
.calc-result .rlabel{ font-size:.82rem; letter-spacing:.1em; text-transform:uppercase; color:var(--text-inv-s); }
.calc-result .rrow{ display:flex; justify-content:space-between; gap:1rem; padding:.55em 0; border-top:1px solid var(--line-dark); font-size:.95rem; }
.calc-result .rrow:first-of-type{ border-top:0; }
.calc-result .rrow span:last-child{ font-weight:600; color:#fff; }
.calc-result .tramo-badge{ display:inline-block; background:rgba(31,169,122,.2); color:#7ee0bd; border:1px solid rgba(31,169,122,.4); padding:.25em .7em; border-radius:100px; font-size:.82rem; font-weight:600; margin-top:.4rem; }
.calc-result .verdict{ margin-top:.9rem; padding-top:.9rem; border-top:1px solid var(--line-dark); font-size:.95rem; color:var(--text-inv-s); }
.calc-result .verdict strong{ color:var(--gold); }

/* Solo lectores de pantalla */
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0; }

/* Skip link accesibilidad */
.skip{ position:absolute; left:-999px; top:0; background:var(--emerald); color:#fff; padding:.6em 1em; z-index:200; border-radius:0 0 8px 0; }
.skip:focus{ left:0; }