/* Calculadora ISR MX — estilos principales
   Fuente: Roboto (self-hosted) · Sin frameworks */

@font-face{font-family:"Roboto";font-style:normal;font-weight:400;font-display:swap;src:url(../fonts/roboto-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"Roboto";font-style:normal;font-weight:500;font-display:swap;src:url(../fonts/roboto-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Roboto";font-style:normal;font-weight:700;font-display:swap;src:url(../fonts/roboto-latin-700-normal.woff2) format("woff2")}

:root{
  --brand:#0b6b4a;
  --brand-dark:#07513a;
  --brand-light:#e7f3ee;
  --accent:#c8102e;
  --ink:#1c2430;
  --text:#374151;
  --muted:#6b7280;
  --line:#e3e6ea;
  --bg:#f6f7f9;
  --card:#ffffff;
  --warn-bg:#fff7e0;
  --warn-line:#f0c24b;
  --radius:8px;
  --shadow:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --wrap:1180px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:"Roboto",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;font-size:17px;line-height:1.7;color:var(--text);background:var(--bg)}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-underline-offset:2px}
a:hover{color:var(--brand-dark)}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;font-weight:700;margin:0 0 .6em}
h1{font-size:clamp(1.65rem,3.2vw,2.2rem)}
h2{font-size:clamp(1.35rem,2.4vw,1.6rem);margin-top:1.8em}
h3{font-size:1.17rem;margin-top:1.4em}
p{margin:0 0 1.1em}
ul,ol{padding-left:1.3em;margin:0 0 1.2em}
li{margin-bottom:.35em}
strong{color:var(--ink)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-9999px;top:0;background:#fff;padding:8px 12px;z-index:100}
.skip:focus{left:8px}

/* ---------- Header ---------- */
.topbar{background:var(--brand-dark);color:#d6ebe2;font-size:13.5px}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding-top:6px;padding-bottom:6px}
.topbar a{color:#fff}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:700;font-size:19px;letter-spacing:-.2px}
.logo-mark{width:34px;height:34px;border-radius:7px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700}
.logo small{display:block;font-size:11.5px;font-weight:400;color:var(--muted);letter-spacing:0;line-height:1}
.nav{display:flex;gap:4px;align-items:center}
.nav a{color:var(--ink);text-decoration:none;font-weight:500;font-size:15.5px;padding:8px 12px;border-radius:6px}
.nav a:hover,.nav a.active{background:var(--brand-light);color:var(--brand-dark)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:7px 10px;font:inherit;font-size:15px;cursor:pointer;color:var(--ink)}
.dropdown{position:relative}
.dropdown-menu{display:none;position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.08);padding:6px;min-width:260px}
.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:8px 10px;font-weight:400}

@media (max-width:900px){
  .nav-toggle{display:block}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 14px}
  .nav.open{display:flex}
  .dropdown-menu{display:block;position:static;border:0;box-shadow:none;padding:0 0 0 12px;min-width:0}
  .topbar .hide-sm{display:none}
}

/* ---------- Breadcrumb / page head ---------- */
.crumbs{font-size:14px;color:var(--muted);padding:14px 0 0}
.crumbs ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"›";margin-right:6px;color:#aab}
.crumbs a{color:var(--muted)}
.page-head{padding:10px 0 6px}
.page-head .lead{font-size:18px;color:var(--text);max-width:760px}
.updated{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--brand-dark);background:var(--brand-light);border-radius:20px;padding:3px 10px;margin-bottom:10px;font-weight:500}

/* ---------- Layout ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding:18px 0 40px;align-items:start}
.layout.full{grid-template-columns:minmax(0,1fr)}
@media (max-width:980px){.layout{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.content-card{padding:28px 32px}
@media (max-width:600px){.content-card{padding:20px 18px}}
.content-card > :first-child{margin-top:0}

/* ---------- Calculator ---------- */
.calc{padding:0;overflow:hidden;margin-bottom:24px}
.calc-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 22px;border-bottom:1px solid var(--line);background:#fbfcfd}
.calc-head h2{margin:0;font-size:1.1rem}
.calc-head .tag{font-size:12.5px;color:var(--muted)}
.calc-body{display:grid;grid-template-columns:1fr 1fr;gap:0}
@media (max-width:760px){.calc-body{grid-template-columns:1fr}}
.calc-form{padding:20px 22px;border-right:1px solid var(--line)}
@media (max-width:760px){.calc-form{border-right:0;border-bottom:1px solid var(--line)}}
.calc-out{padding:20px 22px;background:#fcfdfc}
.field{margin-bottom:14px}
.field label,.field .label{display:block;font-size:14.5px;font-weight:500;color:var(--ink);margin-bottom:5px}
.field .hint{font-size:13px;color:var(--muted);margin-top:4px;line-height:1.45}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:420px){.row2{grid-template-columns:1fr}}
input[type=number],input[type=text],input[type=email],input[type=date],select,textarea{width:100%;font:inherit;font-size:16px;color:var(--ink);background:#fff;border:1px solid #cfd5dc;border-radius:6px;padding:9px 11px;line-height:1.4}
input:focus,select:focus,textarea:focus{outline:2px solid rgba(11,107,74,.25);border-color:var(--brand)}
.money{position:relative}
.money span{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:16px}
.money input{padding-left:24px}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg label{margin:0;font-weight:400;font-size:14.5px}
.seg input{position:absolute;opacity:0;pointer-events:none}
.seg span{display:inline-block;border:1px solid #cfd5dc;border-radius:6px;padding:6px 11px;cursor:pointer;background:#fff;color:var(--ink)}
.seg input:checked+span{background:var(--brand);border-color:var(--brand);color:#fff}
.seg input:focus-visible+span{outline:2px solid var(--brand);outline-offset:2px}
.check{display:flex;gap:8px;align-items:flex-start;font-size:14.5px;color:var(--ink);margin-bottom:10px;cursor:pointer}
.check input{margin-top:5px;accent-color:var(--brand)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:500;font-size:16px;border-radius:6px;padding:10px 18px;border:1px solid var(--brand);background:var(--brand);color:#fff;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-dark);color:#fff}
.btn.ghost{background:#fff;color:var(--brand)}
.btn.ghost:hover{background:var(--brand-light)}
.btn.sm{font-size:14px;padding:6px 12px}
.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}

.result-main{border-bottom:1px dashed var(--line);padding-bottom:12px;margin-bottom:12px}
.result-main .k{font-size:14px;color:var(--muted)}
.result-main .v{font-size:34px;font-weight:700;color:var(--brand-dark);line-height:1.2;font-variant-numeric:tabular-nums}
.result-main .sub{font-size:14px;color:var(--text)}
.rtable{width:100%;border-collapse:collapse;font-size:15px;font-variant-numeric:tabular-nums}
.rtable td{padding:6px 0;border-bottom:1px solid #eef0f2;vertical-align:top}
.rtable td:last-child{text-align:right;white-space:nowrap;padding-left:10px}
.rtable tr.total td{font-weight:700;color:var(--ink);border-bottom:0;border-top:2px solid var(--ink);padding-top:8px}
.rtable tr.minus td:last-child{color:var(--accent)}
.rtable tr.plus td:last-child{color:var(--brand)}
.rtable .muted{color:var(--muted);font-size:13px}
.bar{height:10px;border-radius:5px;background:#e9ecef;overflow:hidden;display:flex;margin:10px 0 6px}
.bar i{display:block;height:100%}
.bar .b-net{background:var(--brand)}
.bar .b-isr{background:var(--accent)}
.bar .b-imss{background:#f0a202}
.legend{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.legend b{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:5px;vertical-align:-1px}
.note{font-size:13px;color:var(--muted);margin-top:12px;line-height:1.5}
.alert{background:var(--warn-bg);border:1px solid var(--warn-line);border-radius:6px;padding:8px 12px;font-size:14px;margin:10px 0;color:#5b4500}
.hidden{display:none!important}

/* ---------- Article content ---------- */
.prose h2{padding-top:.2em;border-top:1px solid var(--line);padding-top:1.2em}
.prose > h2:first-child{border-top:0;padding-top:0}
.prose table,.tbl{width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:15.5px;font-variant-numeric:tabular-nums}
.table-wrap{overflow-x:auto;margin:0 0 1.4em;border:1px solid var(--line);border-radius:6px}
.table-wrap table{margin:0}
.tbl th,.tbl td,.prose table th,.prose table td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left}
.tbl thead th,.prose table thead th{background:#f1f5f3;color:var(--ink);font-weight:500;font-size:14.5px;white-space:nowrap}
.tbl tbody tr:nth-child(even){background:#fafbfb}
.callout{border-left:4px solid var(--brand);background:var(--brand-light);padding:12px 16px;border-radius:0 6px 6px 0;margin:0 0 1.3em;font-size:16px}
.callout p:last-child{margin:0}
.figure{margin:6px 0 22px;background:#f8faf9;border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;justify-content:center}
.figure img{max-height:260px;width:auto}
figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:-14px;margin-bottom:20px}
.toc{background:#f8faf9;border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin:0 0 24px;font-size:15.5px}
.toc strong{display:block;margin-bottom:6px}
.toc ol{margin:0;padding-left:1.2em}
.toc li{margin:3px 0}
.toc a{text-decoration:none}
.toc a:hover{text-decoration:underline}

/* FAQ */
.faq details{border:1px solid var(--line);border-radius:6px;margin-bottom:8px;background:#fff}
.faq summary{cursor:pointer;padding:12px 16px;font-weight:500;color:var(--ink);list-style:none;position:relative;padding-right:40px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:16px;top:9px;font-size:22px;color:var(--brand);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq details > div{padding:0 16px 12px}

/* ---------- Sidebar ---------- */
.sidebar{display:flex;flex-direction:column;gap:18px;position:sticky;top:84px}
@media (max-width:980px){.sidebar{position:static}}
.side-box{padding:16px 18px}
.side-box h3{font-size:15px;text-transform:uppercase;letter-spacing:.4px;color:var(--muted);margin:0 0 10px}
.side-list{list-style:none;padding:0;margin:0}
.side-list li{margin:0;border-bottom:1px solid #f0f2f4}
.side-list li:last-child{border-bottom:0}
.side-list a{display:block;padding:8px 0;text-decoration:none;color:var(--ink);font-size:15px}
.side-list a:hover{color:var(--brand)}
.quick-facts{font-size:14.5px}
.quick-facts div{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid #f0f2f4}
.quick-facts div:last-child{border:0}
.quick-facts b{color:var(--ink);font-variant-numeric:tabular-nums}

/* ---------- Grids / cards ---------- */
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:0 0 1.4em}
.tool-card{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;text-decoration:none;color:var(--text);transition:border-color .15s}
.tool-card:hover{border-color:var(--brand)}
.tool-card .ic{flex:0 0 38px;height:38px;border-radius:7px;background:var(--brand-light);color:var(--brand);display:grid;place-items:center}
.tool-card .ic svg{width:20px;height:20px}
.tool-card strong{display:block;font-size:15.5px;margin-bottom:2px}
.tool-card span{font-size:13.5px;color:var(--muted);line-height:1.45;display:block}

.posts{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.post-card{display:flex;flex-direction:column;overflow:hidden;text-decoration:none;color:var(--text)}
.post-card .thumb{background:#f1f5f3;aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;padding:14px;border-bottom:1px solid var(--line)}
.post-card .thumb img{max-height:100%;width:auto}
.post-card .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.post-card .cat{font-size:12.5px;font-weight:500;color:var(--brand);text-transform:uppercase;letter-spacing:.4px}
.post-card h3{font-size:1.05rem;margin:0}
.post-card p{font-size:14.5px;margin:0;color:var(--muted);line-height:1.55}
.post-card .meta{font-size:13px;color:var(--muted);margin-top:auto;padding-top:6px}
.post-card:hover h3{color:var(--brand)}
.filter{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 18px}
.filter button{font:inherit;font-size:14px;border:1px solid var(--line);background:#fff;border-radius:20px;padding:5px 14px;cursor:pointer;color:var(--ink)}
.filter button.on{background:var(--ink);color:#fff;border-color:var(--ink)}

.article-meta{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:14px;color:var(--muted);margin-bottom:16px}
.author-box{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;margin-top:26px;background:#f8faf9}
.author-box .av{flex:0 0 46px;height:46px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.author-box p{margin:0;font-size:14.5px}
.share{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px;font-size:14px;align-items:center}

.hero-strip{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;align-items:center}
.hero-strip img{max-height:210px;margin-left:auto}
@media (max-width:760px){.hero-strip{grid-template-columns:1fr}.hero-strip img{display:none}}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0 4px}
@media (max-width:640px){.stats{grid-template-columns:repeat(2,1fr)}}
.stats div{background:#fff;border:1px solid var(--line);border-radius:6px;padding:8px 12px}
.stats b{display:block;color:var(--ink);font-size:17px;font-variant-numeric:tabular-nums}
.stats span{font-size:12.5px;color:var(--muted)}

/* ---------- Footer ---------- */
.site-footer{background:#12181f;color:#aeb6c0;font-size:14.5px;margin-top:20px}
.site-footer .wrap{padding-top:36px;padding-bottom:18px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
@media (max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media (max-width:480px){.foot-grid{grid-template-columns:1fr}}
.site-footer h4{color:#fff;font-size:15px;margin:0 0 10px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:0 0 6px}
.site-footer a{color:#cfd6de;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:underline}
.foot-bottom{border-top:1px solid #2a323c;margin-top:26px;padding-top:14px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px}

/* Cookie banner */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;max-width:560px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 30px rgba(0,0,0,.15);padding:14px 16px;font-size:14.5px;z-index:60;display:none}
.cookie.show{display:block}
.cookie p{margin:0 0 10px}

/* Forms (contacto) */
.form-grid{display:grid;gap:14px;max-width:620px}

@media print{
  .site-header,.topbar,.sidebar,.site-footer,.cookie,.actions,.share,.crumbs{display:none!important}
  body{background:#fff}
  .layout{display:block}
  .card{box-shadow:none;border:0}
}
.stats span{display:block;line-height:1.35}
@media (max-width:600px){.calc-head .tag{display:none}.page-head .lead{font-size:16.5px}}
.rtable td[colspan]{text-align:left;padding-top:10px}
.crumbs{padding:14px 16px 0}