/* CosteIA — tema claro, moderno, tipo SaaS. Inter + índigo + esmeralda.
   Sin dependencias: variables CSS, responsive, mobile-first. */
:root{
  --bg:#f7f8fb; --panel:#ffffff; --ink:#0b1220; --ink-2:#3a4254; --muted:#717a8c;
  --line:#e7e9f0; --line-2:#eef0f6;
  --brand:#6366f1; --brand-2:#4f46e5; --brand-soft:#eef0ff;
  --ok:#10b981; --ok-soft:#e7f8f1; --warn:#f59e0b;
  --shadow:0 1px 2px rgba(16,24,40,.04), 0 8px 24px rgba(16,24,40,.06);
  --shadow-sm:0 1px 2px rgba(16,24,40,.06);
  --r:14px; --r-sm:10px;
  --maxw:1080px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  line-height:1.55; font-size:16px; -webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw); margin:0 auto; padding:0 20px}
a{color:var(--brand-2); text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.18; letter-spacing:-.02em; color:var(--ink); margin:.2em 0 .4em}
h1{font-size:2.5rem; font-weight:800}
h2{font-size:1.55rem; font-weight:700}
p{margin:.5em 0}
.muted{color:var(--muted)}
.lead{font-size:1.18rem; color:var(--ink-2); max-width:60ch}
.ic{width:1.05em; height:1.05em; fill:none; stroke:currentColor; stroke-width:2;
  stroke-linecap:round; stroke-linejoin:round; vertical-align:-.15em}
.ic.ok{stroke:var(--ok)}

/* ---- Header ---- */
.site-head{position:sticky; top:0; z-index:30; background:rgba(247,248,251,.82);
  backdrop-filter:saturate(160%) blur(10px); border-bottom:1px solid var(--line)}
.head-in{display:flex; align-items:center; gap:18px; height:64px}
.brand{display:flex; align-items:center; gap:10px; font-weight:800; color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{display:grid; place-items:center; width:32px; height:32px; border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; font-weight:800;
  box-shadow:0 2px 8px rgba(79,70,229,.35)}
.brand-mark.sm{width:26px; height:26px; border-radius:7px; font-size:.85rem}
.brand-name{font-size:1.12rem; letter-spacing:-.02em}
.nav{display:flex; gap:6px; margin-left:8px}
.nav a{color:var(--ink-2); font-weight:500; font-size:.95rem; padding:8px 12px; border-radius:9px}
.nav a:hover{background:var(--line-2); text-decoration:none}
.nav a.on{color:var(--brand-2); background:var(--brand-soft)}
.nav-cta{margin-left:auto; background:var(--ink); color:#fff; font-weight:600; font-size:.92rem;
  padding:9px 16px; border-radius:10px}
.nav-cta:hover{text-decoration:none; background:#1c2434}

/* ---- Buttons ---- */
.btn{display:inline-flex; align-items:center; gap:.5em; background:var(--brand);
  color:#fff; font-weight:600; border:0; border-radius:11px; padding:11px 18px;
  cursor:pointer; font-size:.98rem; box-shadow:0 4px 12px rgba(99,102,241,.28); transition:.15s}
.btn:hover{background:var(--brand-2); text-decoration:none; transform:translateY(-1px)}
.btn-lg{padding:14px 24px; font-size:1.05rem}
.btn-sm{padding:7px 13px; font-size:.86rem; border-radius:9px; box-shadow:none}
.btn-ghost{background:#fff; color:var(--ink); border:1px solid var(--line); box-shadow:var(--shadow-sm)}
.btn-ghost:hover{background:var(--line-2)}

/* ---- Hero ---- */
.hero{display:grid; grid-template-columns:1.15fr .85fr; gap:40px; align-items:center;
  padding:56px 0 40px}
.eyebrow{display:inline-flex; align-items:center; gap:.5em; font-size:.8rem; font-weight:600;
  text-transform:uppercase; letter-spacing:.06em; color:var(--brand-2);
  background:var(--brand-soft); padding:6px 12px; border-radius:999px}
.hero h1{font-size:3.2rem; margin:.5em 0 .35em}
.grad{background:linear-gradient(100deg,var(--brand),#a855f7); -webkit-background-clip:text;
  background-clip:text; -webkit-text-fill-color:transparent}
.hero-btns{display:flex; gap:12px; flex-wrap:wrap; margin:1.5rem 0 1rem}
.trust{font-size:.95rem; color:var(--muted)}
.hero-card{background:var(--panel); border:1px solid var(--line); border-radius:var(--r);
  box-shadow:var(--shadow); padding:18px}
.hc-head{display:flex; align-items:center; gap:.5em; font-weight:700; font-size:.92rem;
  color:var(--ink-2); padding-bottom:12px; border-bottom:1px solid var(--line-2); margin-bottom:6px}
.hc-row{display:grid; grid-template-columns:1fr auto; align-items:center; gap:4px 10px;
  padding:10px 4px; border-bottom:1px solid var(--line-2)}
.hc-name{font-weight:600; font-size:.95rem}
.hc-prov{grid-row:2; font-size:.78rem; color:var(--muted)}
.hc-price{grid-row:1/3; font-weight:700; color:var(--ink); font-variant-numeric:tabular-nums}
.hc-price small{color:var(--muted); font-weight:500; font-size:.72rem; margin-left:2px}
.hc-link{display:inline-block; margin-top:12px; font-weight:600; font-size:.92rem}

/* ---- Section heads ---- */
.tools{padding:30px 0}
.sec-h{font-size:1.35rem; margin-bottom:1rem}
.sec-head-row{display:flex; align-items:baseline; justify-content:space-between; gap:12px; flex-wrap:wrap}
.muted-link{color:var(--muted); font-weight:600; font-size:.92rem}

/* ---- Tool cards ---- */
.tool-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:16px}
.tool-card{display:flex; flex-direction:column; gap:6px; background:var(--panel);
  border:1px solid var(--line); border-radius:var(--r); padding:22px; box-shadow:var(--shadow-sm);
  color:var(--ink); transition:.15s}
.tool-card:hover{text-decoration:none; transform:translateY(-2px); box-shadow:var(--shadow); border-color:#d8dbe6}
.tool-card strong{font-size:1.12rem}
.tool-card p{color:var(--muted); font-size:.95rem; flex:1}
.tool-ic{display:grid; place-items:center; width:42px; height:42px; border-radius:11px;
  background:var(--brand-soft); color:var(--brand-2); margin-bottom:4px}
.tool-ic .ic{width:22px; height:22px}
.tool-go{color:var(--brand-2); font-weight:600; font-size:.92rem; display:inline-flex; align-items:center; gap:.4em}

/* ---- Voz cards ---- */
.voz-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(220px,1fr)); gap:14px}
.voz-card{display:flex; flex-direction:column; gap:6px; background:var(--panel);
  border:1px solid var(--line); border-radius:var(--r); padding:18px; box-shadow:var(--shadow-sm);
  color:var(--ink); transition:.15s}
.voz-card:hover{text-decoration:none; transform:translateY(-2px); box-shadow:var(--shadow); border-color:#d8dbe6}
.voz-card strong{font-size:1.05rem}
.voz-card p{font-size:.9rem; margin:0}
.voz-logo{display:grid; place-items:center; width:40px; height:40px; border-radius:11px;
  background:var(--ink); color:#fff; font-weight:800; font-size:.95rem; letter-spacing:.02em}
.voz-logo.sm{width:26px; height:26px; font-size:.72rem; border-radius:7px; display:inline-grid;
  vertical-align:-.5em; margin-right:8px}
.voz-logo.lg{width:64px; height:64px; font-size:1.5rem; border-radius:16px}
.voz-meta{display:flex; flex-wrap:wrap; gap:6px; margin:2px 0}
.voz-price{font-weight:700; color:var(--ink); font-size:.92rem; margin-top:auto}
.pill{display:inline-flex; align-items:center; gap:.35em; font-size:.78rem; font-weight:600;
  color:var(--ink-2); background:var(--line-2); padding:4px 10px; border-radius:999px}
.pill.ok{color:#0a8f63; background:var(--ok-soft)}
.pill.ok .ic{stroke:var(--ok); width:.95em; height:.95em}

/* ---- Recomendados (cross-sell) ---- */
.reco-grid{display:grid; gap:14px}
.reco-card{display:flex; align-items:center; gap:16px; background:linear-gradient(100deg,#fff,#fbfaff);
  border:1px solid var(--line); border-radius:var(--r); padding:18px 20px; box-shadow:var(--shadow-sm)}
.reco-card .voz-logo{flex:none; background:linear-gradient(135deg,#7c3aed,#4f46e5)}
.reco-body{flex:1; min-width:0}
.reco-body strong{font-size:1.05rem}
.reco-body p{margin:.2em 0}
.reco-card .btn-sm{flex:none}
@media(max-width:560px){ .reco-card{flex-direction:column; align-items:flex-start} }

/* ---- Content wrapper ---- */
.content{padding:36px 0 10px; max-width:880px}
.content>.eyebrow{margin-bottom:14px}
.panel{background:var(--panel); border:1px solid var(--line); border-radius:var(--r);
  box-shadow:var(--shadow-sm)}
.crumbs{font-size:.88rem; color:var(--muted); margin-bottom:8px}
.ad-slot{margin:32px 0; padding:22px; text-align:center; color:var(--muted); font-size:.82rem;
  background:repeating-linear-gradient(45deg,#fafbfd,#fafbfd 10px,#f3f5f9 10px,#f3f5f9 20px);
  border:1px dashed var(--line); border-radius:var(--r)}

/* ---- Calculadora ---- */
.calc{display:grid; grid-template-columns:340px 1fr; gap:24px; margin-top:18px}
.calc-form{padding:20px; display:flex; flex-direction:column; gap:16px; align-self:start; position:sticky; top:80px}
.field{display:flex; flex-direction:column; gap:5px}
.field label{font-weight:600; font-size:.92rem}
.field input{font:inherit; font-size:1.05rem; font-weight:600; padding:11px 13px; border-radius:10px;
  border:1px solid var(--line); background:#fff; color:var(--ink); width:100%}
.field input:focus{outline:none; border-color:var(--brand); box-shadow:0 0 0 3px var(--brand-soft)}
.field small{color:var(--muted); font-size:.78rem}
.calc-presets{display:flex; flex-wrap:wrap; align-items:center; gap:7px; padding-top:6px; border-top:1px solid var(--line-2)}
.chip{font:inherit; font-size:.84rem; font-weight:600; color:var(--ink-2); background:#fff;
  border:1px solid var(--line); border-radius:999px; padding:6px 13px; cursor:pointer; transition:.15s}
.chip:hover{border-color:var(--brand); color:var(--brand-2)}
.chip.sel{background:var(--brand); border-color:var(--brand); color:#fff}
.calc-es-toggle{display:flex; align-items:center; gap:.55em; font-size:.9rem; color:var(--ink-2);
  cursor:pointer; padding-top:10px; border-top:1px solid var(--line-2)}
.calc-es-toggle input{width:17px; height:17px; accent-color:var(--brand); cursor:pointer}
.calc-es-toggle small{color:var(--muted)}
.calc-out{min-width:0}
.calc-es-strip{display:flex; align-items:center; gap:.5em; background:linear-gradient(90deg,#fff7ed,#fffbeb);
  border:1px solid #fde9c8; color:#92560b; border-radius:var(--r); padding:11px 15px; margin-bottom:14px; font-size:.92rem}
.calc-es-strip .ic{stroke:var(--warn); flex:none}
.faq{margin-top:8px}
.faq details{border:1px solid var(--line); border-radius:var(--r-sm); background:#fff; margin-bottom:10px; overflow:hidden}
.faq summary{cursor:pointer; padding:14px 16px; font-weight:600; list-style:none; position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+"; position:absolute; right:16px; top:12px; font-size:1.3rem; color:var(--muted); font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq details[open] summary{border-bottom:1px solid var(--line-2)}
.faq details p{margin:0; padding:12px 16px 16px; color:var(--ink-2); font-size:.95rem}
.calc-best{padding:18px 20px; margin-bottom:16px; border-left:4px solid var(--ok);
  display:grid; grid-template-columns:1fr auto; gap:2px 12px; align-items:center}
.cb-tag{grid-column:1/-1; font-size:.74rem; font-weight:700; text-transform:uppercase; letter-spacing:.05em;
  color:#0a8f63}
.cb-main{display:flex; align-items:baseline; gap:8px}
.cb-main strong{font-size:1.5rem}
.cb-prov{color:var(--muted); font-size:.9rem}
.cb-price{grid-row:2; grid-column:2; text-align:right; font-size:1.5rem; font-weight:800; color:var(--ink);
  font-variant-numeric:tabular-nums}
.cb-price small{display:block; font-size:.7rem; color:var(--muted); font-weight:500}
.cb-save{grid-column:1/-1; color:#0a8f63; font-weight:600; font-size:.9rem; margin-top:4px}
.calc-table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:var(--r); background:#fff}
.calc-table,.cmp-table{width:100%; border-collapse:collapse; font-size:.94rem}
.calc-table th,.calc-table td{padding:12px 14px; text-align:left; border-bottom:1px solid var(--line-2)}
.calc-table th{font-size:.78rem; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); font-weight:600}
.calc-table tr:last-child td{border-bottom:0}
.calc-table .num,.cmp-table .num{text-align:right; font-variant-numeric:tabular-nums}
.calc-table .strong{font-weight:700}
.calc-table .prov{color:var(--muted)}
.calc-table tr.is-best td{background:var(--ok-soft)}
.dot{display:inline-block; font-size:.68rem; font-weight:700; text-transform:uppercase; color:#0a8f63;
  background:#fff; border:1px solid var(--ok); border-radius:999px; padding:1px 7px; margin-left:6px}
.calc-note{font-size:.82rem; margin-top:12px}

/* ---- Quiz ---- */
.quiz{padding:24px; margin:18px 0 30px}
.quiz-q{display:block; font-weight:700; font-size:1.1rem; margin-bottom:14px}
.quiz-opts{display:grid; gap:10px}
.quiz-opt{font:inherit; text-align:left; background:#fff; border:1px solid var(--line); border-radius:11px;
  padding:14px 16px; cursor:pointer; font-weight:500; color:var(--ink); transition:.13s}
.quiz-opt:hover{border-color:var(--brand); background:var(--brand-soft)}
.quiz-opt.sel{border-color:var(--brand); background:var(--brand-soft); color:var(--brand-2); font-weight:600}
.quiz-result{padding:4px}
.quiz-tag{font-size:.74rem; font-weight:700; text-transform:uppercase; letter-spacing:.05em; color:var(--brand-2)}
.qr-main{display:flex; align-items:center; gap:14px; margin:10px 0 14px}
.qr-main strong{font-size:1.4rem}
.qr-main p{margin:0}
.qr-points{list-style:none; padding:0; margin:0 0 16px; display:grid; gap:8px}
.qr-points li{display:flex; align-items:center; gap:.5em; font-weight:500}
.qr-cta{display:flex; align-items:center; gap:16px; flex-wrap:wrap; padding-top:14px; border-top:1px solid var(--line-2)}
.qr-price{font-weight:700}
.qr-alt{margin-top:12px; font-size:.9rem}
.quiz-foot{margin-top:16px}

/* ---- Comparativa ---- */
.cmp-table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:var(--r); background:#fff; margin-bottom:10px}
.cmp-table th,.cmp-table td{padding:13px 14px; text-align:left; border-bottom:1px solid var(--line-2); vertical-align:middle}
.cmp-table th{font-size:.78rem; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); font-weight:600}
.cmp-table tr:last-child td{border-bottom:0}
.cmp-table td a{font-weight:600; color:var(--ink)}
.cmp-claim{display:block; font-size:.82rem; font-weight:400; margin-top:2px}
.cmp-table .ic.ok{width:20px; height:20px}

/* ---- Detalle ---- */
.detalle-head{display:flex; gap:20px; align-items:flex-start; margin:8px 0 28px}
.detalle-head h1{margin-top:0}
.detalle-cols{display:grid; grid-template-columns:1fr 1fr; gap:30px}
.ticks{list-style:none; padding:0; margin:0; display:grid; gap:10px}
.ticks li{display:flex; align-items:flex-start; gap:.6em}
.tags{display:flex; flex-wrap:wrap; gap:8px}
.tag{background:var(--line-2); color:var(--ink-2); font-size:.85rem; font-weight:500; padding:6px 12px; border-radius:8px}

/* ---- Guía: alternativas ---- */
.alt-tool{padding:18px 0; border-bottom:1px solid var(--line-2)}
.alt-head{display:flex; align-items:center; gap:14px; margin-bottom:6px}
.alt-head h3{margin:0; font-size:1.2rem}
.alt-head p{margin:0}
.alt-head>div{flex:1; min-width:0}
.alt-head .btn-sm{flex:none}
.alt-meta{font-size:.9rem; margin-top:8px}
.cta-box{padding:22px 24px; margin:24px 0; text-align:center}
.cta-box strong{font-size:1.2rem; display:block}
.cta-box p{margin:.3em 0 1rem}
@media(max-width:560px){ .alt-head{flex-wrap:wrap} .alt-head .btn-sm{order:3; width:100%; justify-content:center} }

/* ---- Prosa ---- */
.prosa{max-width:720px}
.prosa h2{margin-top:1.6em; font-size:1.25rem}
.prosa p{color:var(--ink-2)}

/* ---- Footer ---- */
.site-foot{margin-top:50px; border-top:1px solid var(--line); background:#fff}
.foot-in{display:flex; justify-content:space-between; gap:24px; flex-wrap:wrap; padding:32px 0 18px}
.foot-in p{margin:.3em 0 0}
.foot-in .brand-mark{display:inline-grid; vertical-align:-.4em; margin-right:8px}
.foot-nav{display:flex; flex-wrap:wrap; gap:6px 18px; align-items:flex-start}
.foot-nav a{color:var(--ink-2); font-size:.92rem; font-weight:500}
.disclosure{font-size:.8rem; color:var(--muted); padding:14px 20px 28px; border-top:1px solid var(--line-2); margin-top:10px}

/* ---- Responsive ---- */
@media(max-width:860px){
  .hero{grid-template-columns:1fr; gap:28px; padding:36px 0 24px}
  .hero h1{font-size:2.5rem}
  .calc{grid-template-columns:1fr}
  .calc-form{position:static}
  .detalle-cols{grid-template-columns:1fr; gap:22px}
  .nav{display:none}
}
@media(max-width:560px){
  h1{font-size:2rem}
  .hero h1{font-size:2.1rem}
  .nav-cta{margin-left:auto}
  .detalle-head{flex-direction:column; gap:12px}
  .foot-in{flex-direction:column; gap:18px}
}