/* CuántoMeQueda — hoja de estilos
   Concepto: la calculadora como una nómina limpia. El formulario es la mesa de trabajo;
   el resultado es el "recibo" con devengos, deducciones y un líquido grande y claro. */
:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --ink: #132130;
  --muted: #566475;
  --line: #dde2e8;
  --accent: #0b6b4e;        /* lo que te queda */
  --accent-ink: #ffffff;
  --accent-soft: #e2f1ea;
  --minus: #a8432c;         /* lo que se va */
  --minus-soft: #f8e9e4;
  --focus: #1b66c9;
  --warn-soft: #fff4d6;
  --warn-ink: #6b4a00;
  --font-display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-figures: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(19, 33, 48, .06), 0 8px 24px -12px rgba(19, 33, 48, .18);
  --wrap: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e141b; --surface: #151d26; --ink: #e7ecf1; --muted: #98a5b3; --line: #26313d;
    --accent: #43c495; --accent-ink: #062a1d; --accent-soft: #11291f; --minus: #f08d72; --minus-soft: #33201b;
    --focus: #79aef5; --warn-soft: #2e2711; --warn-ink: #f3d68a;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px -14px rgba(0,0,0,.6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e141b; --surface: #151d26; --ink: #e7ecf1; --muted: #98a5b3; --line: #26313d;
  --accent: #43c495; --accent-ink: #062a1d; --accent-soft: #11291f; --minus: #f08d72; --minus-soft: #33201b;
  --focus: #79aef5; --warn-soft: #2e2711; --warn-ink: #f3d68a;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px -14px rgba(0,0,0,.6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 17px/1.6 var(--font-body);
  font-variant-numeric: tabular-nums;
}
img { max-width: 100%; }
[hidden] { display: none !important; }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; text-wrap: balance; letter-spacing: -.01em; margin: 0; }
h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 3.1rem); font-weight: 750; }
h2 { font-size: clamp(1.45rem, 1.2rem + 1vw, 1.9rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: 20px; }
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1em; }
.prose h2 { margin-top: 1.8em; }
.prose h3 { margin-top: 1.5em; }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li + li { margin-top: .35em; }
.muted { color: var(--muted); }
.small { font-size: .9rem; }
.eyebrow { font: 700 .78rem/1.2 var(--font-body); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 12px; }

/* Cabecera */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; padding-block: 8px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font: 750 1.2rem/1 var(--font-display); letter-spacing: -.02em; }
.brand-mark { width: 30px; height: 30px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font: 800 1rem/1 var(--font-display); }
.brand b { color: var(--accent); font-weight: 750; }
.nav { display: flex; gap: 4px 18px; flex-wrap: wrap; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 700; font-size: .95rem; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-color: var(--accent); }

/* Migas */
.crumbs { font-size: .88rem; color: var(--muted); padding-block: 18px 0; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; }
.crumbs li + li::before { content: "›"; margin-right: 6px; color: var(--line); }
.crumbs a { color: var(--muted); }

/* Home */
.hero { padding-block: 44px 28px; }
.hero h1 { max-width: 20ch; }
.hero .lede { margin-top: 14px; font-size: 1.15rem; color: var(--muted); max-width: 56ch; }
.hero-rule { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.chip { display: inline-flex; align-items: center; gap: 6px; font-size: .86rem; font-weight: 700; padding: 6px 11px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--muted); }
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }

.section { padding-block: 34px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }

.problems { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 14px; }
.problem { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 20px 16px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.problem h3 { font-size: 1.25rem; }
.problem h3 q { quotes: "«" "»"; }
.problem p { color: var(--muted); font-size: .95rem; }
.problem ul { list-style: none; margin: auto 0 0; padding: 0; display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.problem li a { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); font-weight: 700; }
.problem li:last-child a { border-bottom: 0; }
.problem li a::after { content: "→"; color: var(--accent); transition: transform .15s; }
.problem li a:hover::after { transform: translateX(3px); }
.problem li a:hover { color: var(--accent); }

.cats { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 240px), 1fr)); gap: 14px; }
.cat { padding: 18px 0; border-top: 2px solid var(--ink); min-width: 0; }
.cat h3 a { color: var(--ink); text-decoration: none; }
.cat ul { list-style: none; padding: 0; margin: 10px 0 0; }
.cat li { padding: 5px 0; }
.cat .soon { color: var(--muted); font-size: .92rem; }
.cat .soon::after { content: " · pronto"; font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }

.method { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); gap: 22px; }
.method div { min-width: 0; }
.method h3 { font-size: 1.02rem; margin-bottom: 6px; }
.method p { color: var(--muted); font-size: .95rem; }

.guides { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr)); gap: 0 28px; }
.guides a { display: block; padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 700; }
.guides a span { display: block; font-weight: 400; color: var(--muted); font-size: .92rem; margin-top: 2px; }
.guides a:hover { color: var(--accent); }

/* Página de herramienta */
.tool-head { padding-block: 14px 22px; }
.tool-head .lede { margin-top: 10px; color: var(--muted); font-size: 1.1rem; max-width: 62ch; }
.updated { display: inline-block; margin-top: 12px; font-size: .86rem; color: var(--muted); }
.tool { display: grid; gap: 20px; align-items: start; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 960px) { .tool { grid-template-columns: minmax(0, 1fr) minmax(0, 440px); } .result { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 16px); } }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; min-width: 0; }
.form { display: grid; gap: 18px; }
.form fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: 14px; }
.form legend { font: 700 .78rem/1.2 var(--font-body); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin-bottom: 4px; padding: 0; }
.row { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); }
.field { display: grid; gap: 6px; min-width: 0; }
.field label, .field .label { font-weight: 700; font-size: .96rem; }
.field .hint { font-size: .84rem; color: var(--muted); }
.input { position: relative; }
.input input, .field select {
  width: 100%; font: 400 1.05rem/1.3 var(--font-body); color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 14px; min-height: 48px; appearance: none;
}
.field select { background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%); background-position: calc(100% - 20px) 50%, calc(100% - 15px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 38px; }
.input input:focus, .field select:focus { border-color: var(--accent); outline: 2px solid var(--accent-soft); outline-offset: 0; background: var(--surface); }
.input[data-unit] input { padding-right: 46px; }
.input[data-unit]::after { content: attr(data-unit); position: absolute; right: 14px; top: 50%; transform: translateY(-50%); color: var(--muted); font-weight: 700; pointer-events: none; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label { position: relative; }
.seg input { position: absolute; opacity: 0; inset: 0; }
.seg span { display: inline-block; padding: 10px 14px; min-height: 44px; border: 1px solid var(--line); border-radius: var(--radius-sm); font-weight: 700; cursor: pointer; background: var(--bg); }
.seg input:checked + span { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.seg input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: .96rem; cursor: pointer; }
.check input { width: 20px; height: 20px; margin-top: 3px; accent-color: var(--accent); flex: none; }
details.more { border-top: 1px dashed var(--line); padding-top: 14px; }
details.more summary { cursor: pointer; font-weight: 700; color: var(--accent); }
details.more[open] summary { margin-bottom: 14px; }

/* Resultado = recibo */
.result { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; min-width: 0; }
.result-top { padding: 22px 22px 18px; background: var(--accent-soft); border-bottom: 1px dashed var(--accent); }
.result-label { font-weight: 700; color: var(--accent); }
.result-big { font: 800 clamp(2.6rem, 2rem + 3vw, 3.6rem)/1 var(--font-display); letter-spacing: -.03em; margin-top: 8px; color: var(--ink); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.result-big small { font-size: .45em; font-weight: 700; color: var(--muted); letter-spacing: 0; margin-left: 4px; }
.result-sub { margin-top: 8px; color: var(--muted); font-size: .95rem; }
.result-body { padding: 16px 22px 22px; display: grid; gap: 16px; }
.ledger { width: 100%; border-collapse: collapse; font-size: .95rem; }
.ledger caption { text-align: left; font: 700 .76rem/1.2 var(--font-body); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); padding: 6px 0; }
.ledger td { padding: 7px 0; vertical-align: baseline; border-bottom: 1px solid var(--line); }
.ledger td:last-child { text-align: right; font-family: var(--font-figures); font-size: .92rem; white-space: nowrap; padding-left: 12px; }
.ledger tr.minus td:last-child { color: var(--minus); }
.ledger tr.total td { border-bottom: 0; border-top: 2px solid var(--ink); font-weight: 700; padding-top: 10px; }
.ledger tr.total td:last-child { color: var(--accent); font-size: 1rem; }
.ledger .note { display: block; color: var(--muted); font-size: .82rem; }
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 104px), 1fr)); gap: 8px; }
.stat { background: var(--bg); border-radius: var(--radius-sm); padding: 10px 12px; min-width: 0; }
.stat b { display: block; font: 700 1.05rem/1.25 var(--font-figures); margin-top: 2px; overflow-wrap: anywhere; }
.stat span { font-size: .82rem; color: var(--muted); }
.bar { display: flex; height: 12px; border-radius: 6px; overflow: hidden; background: var(--line); }
.bar i { display: block; height: 100%; }
.bar .k { background: var(--accent); }
.bar .m1 { background: var(--minus); }
.bar .m2 { background: color-mix(in srgb, var(--minus) 55%, var(--surface)); }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: .82rem; color: var(--muted); margin-top: 6px; }
.legend i { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; vertical-align: 0; }
.alert { padding: 12px 14px; border-radius: var(--radius-sm); background: var(--warn-soft); color: var(--warn-ink); font-size: .92rem; }
.alert.good { background: var(--accent-soft); color: var(--ink); }
.disclaimer { font-size: .82rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 12px; }
.result-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.btn { font: 700 .92rem/1 var(--font-body); padding: 11px 14px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; min-height: 42px; }
.btn:hover { border-color: var(--ink); }

/* Contenido bajo la herramienta */
.content { display: grid; gap: 8px; padding-block: 40px 20px; grid-template-columns: minmax(0, 1fr); }
.content > section { min-width: 0; }
.content > section { padding-block: 22px; border-top: 1px solid var(--line); }
.content > section:first-child { border-top: 0; }
.formula { font-family: var(--font-figures); font-size: .92rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; overflow-x: auto; white-space: pre; line-height: 1.7; }
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); }
.data { width: 100%; border-collapse: collapse; font-size: .93rem; }
.data th, .data td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data th { font-size: .78rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); background: var(--bg); }
.data td.n { font-family: var(--font-figures); white-space: nowrap; }
.data tr:last-child td { border-bottom: 0; }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 1.04rem; list-style: none; display: flex; justify-content: space-between; gap: 14px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font: 700 1.3rem/1 var(--font-display); }
.faq details[open] summary::after { content: "–"; }
.faq details > div { margin-top: 10px; color: var(--ink); }
.faq details > div > * + * { margin-top: .7em; }
.sources li { overflow-wrap: anywhere; }
.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); gap: 12px; margin-top: 14px; }
.related a { display: block; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); text-decoration: none; color: var(--ink); font-weight: 700; min-width: 0; }
.related a span { display: block; color: var(--muted); font-weight: 400; font-size: .9rem; margin-top: 4px; }
.related a:hover { border-color: var(--accent); }

/* Espacios publicitarios reservados (vacíos hasta activar AdSense) */
.ad-slot { margin-block: 24px; min-height: 120px; display: grid; place-items: center; }
.ad-slot[hidden] { display: none !important; }
.ad-slot::before { content: "Publicidad"; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); display: block; margin-bottom: 6px; }

/* Artículos */
.article-head { padding-block: 14px 26px; }
.article-head .lede { margin-top: 12px; font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.article { padding-bottom: 40px; }
.cta-tool { display: flex; justify-content: space-between; align-items: center; gap: 14px; flex-wrap: wrap; background: var(--accent-soft); border-radius: var(--radius); padding: 18px 20px; margin-block: 28px; }
.cta-tool p { font-weight: 700; }
.cta-tool a { background: var(--accent); color: var(--accent-ink); text-decoration: none; font-weight: 700; padding: 11px 16px; border-radius: var(--radius-sm); }

/* Pie */
.site-footer { margin-top: 40px; background: var(--surface); border-top: 1px solid var(--line); padding-block: 34px 28px; font-size: .92rem; }
.foot { display: grid; gap: 24px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); }
.foot h2 { font: 700 .78rem/1.2 var(--font-body); text-transform: uppercase; letter-spacing: .09em; color: var(--muted); margin-bottom: 10px; }
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.foot a { color: var(--ink); text-decoration: none; }
.foot a:hover { color: var(--accent); text-decoration: underline; }
.foot-legal { margin-top: 26px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: .84rem; display: grid; gap: 6px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
@media print { .site-header, .site-footer, .ad-slot, .result-actions { display: none; } }