/* Herramientas y extensiones de Stannix: mismo diseño que la portada nueva (web/v2/index.html):
   paleta clara (papel, máscara verde, oro de los pads), Saira Condensed en titulares, B612 en texto y JetBrains Mono en datos.
   La cabecera (.top) y el pie (footer) son copia de los de v2. */
:root {
  --paper: #F5F7F5; --paper-2: #EBEFEC; --surface: #FFFFFF;
  --ink: #17201B; --ink-2: #4F5A53; --ink-3: #6C7670; --line: #CED5D0; --line-2: #B3BDB6;
  --mask: #174A31; --mask-2: #22603F; --mask-deep: #113824; --silk: #EEF1E9; --silk-2: #BCCDC2; --gold: #D4B25A;
  --warn: #A86A00; --warn-bg: #FBF0DA; --err: #B8342C;
  --display: "Saira Condensed", "Arial Narrow", sans-serif;
  --sans: "B612", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --sh-1: 0 1px 2px rgba(20, 30, 24, .08);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --wrap: 1240px;
  color-scheme: light;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16px/1.6 var(--sans); -webkit-font-smoothing: antialiased; }
::selection { background: #CFE3D6; }
a { color: inherit; }
h1, h2, h3 { font-family: var(--display); font-weight: 700; letter-spacing: .005em; line-height: 1.05; margin: 0; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.mono { font-family: var(--mono); font-size: 13px; font-variant-numeric: tabular-nums; }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 4px; }
html[lang="en"] [lang="es"], html[lang="es"] [lang="en"] { display: none !important; }
[hidden] { display: none !important; }

/* botones */
.btn { display: inline-flex; align-items: center; gap: 10px; height: 46px; padding: 0 20px; border-radius: 4px; border: 1px solid transparent;
  font: 700 15px var(--sans); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease), scale 150ms var(--ease); }
.btn:active { scale: .96; }
.btn--go { background: var(--mask); color: #fff; }
.btn--go:hover { background: var(--mask-2); }
.btn--line { border-color: var(--line-2); color: var(--ink); background: var(--surface); }
.btn--line:hover { border-color: var(--ink); }
.btn--sm { height: 36px; padding: 0 14px; font-size: 14px; }

/* ------------------------------------------------ cabecera (copia de v2) */
.btn--solid { background: var(--mask); border-color: var(--mask); color: var(--silk); }
.btn--solid:hover { background: var(--mask-2); border-color: var(--mask-2); }
.top { position: sticky; top: 0; z-index: 30; background: color-mix(in srgb, var(--paper) 84%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.top.is-scrolled { border-bottom-color: var(--line); }
.top .wrap { display: flex; align-items: center; gap: 26px; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 700 21px var(--display); letter-spacing: .06em; text-transform: uppercase; }
.brand svg { width: 28px; height: 28px; }
.top nav { display: flex; gap: 22px; margin-left: auto; font-size: 14.5px; }
.top nav a { text-decoration: none; color: var(--ink-2); }
.top nav a:hover { color: var(--ink); }
.lang { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button { border: 0; background: none; padding: 5px 9px; font: 600 12px var(--mono); color: var(--ink-3); cursor: pointer; min-height: 0; }
.lang button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.top .btn { height: auto; gap: 8px; padding: 7px 13px; border-radius: 9px; border: 1px solid var(--line-2); font-weight: 700; font-size: 13.5px; box-shadow: var(--sh-1); }
.top .btn--solid { border-color: var(--mask); }
.top .btn--solid:hover { border-color: var(--mask-2); }

/* página de herramienta */
.crumbs { display: flex; gap: 8px; padding-top: 28px; font: 400 13px var(--mono); color: var(--ink-3); }
.crumbs a { text-decoration: none; } .crumbs a:hover { color: var(--ink); }
.head { padding: 14px 0 28px; display: grid; gap: 12px; max-width: 760px; }
.head h1 { font-size: clamp(38px, 5vw, 60px); }
.head p { font-size: 18px; color: var(--ink-2); }
.tool { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px; align-items: start; }
.card { background: var(--surface); border-radius: 8px; box-shadow: 0 0 0 1px rgba(23,32,27,.07), 0 1px 2px rgba(23,32,27,.05); padding: 22px; min-width: 0; }
.card h2 { font-size: 22px; margin-bottom: 14px; }
.card--out { background: var(--mask-deep); color: var(--silk); position: sticky; top: 84px; }
.card--out h2 { color: var(--silk); }
.card--wide { grid-column: 1 / -1; }
.fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 16px; }
.field { display: grid; grid-template-columns: minmax(0, 1fr); gap: 5px; min-width: 0; }
.field--full { grid-column: 1 / -1; }
.field > span { font-size: 13px; color: var(--ink-2); }
.in { display: flex; border: 1px solid var(--line-2); border-radius: 4px; background: var(--surface); transition: border-color 150ms var(--ease); }
.in:focus-within { border-color: var(--mask); box-shadow: 0 0 0 3px rgba(30,107,71,.14); }
.in input, .in select { flex: 1; min-width: 0; width: 100%; height: 42px; border: 0; background: none; padding: 0 12px; font: 400 16px var(--mono); color: var(--ink); font-variant-numeric: tabular-nums; outline: none; }
.in select { font-family: var(--sans); font-size: 15px; cursor: pointer; }
.in i { display: grid; place-items: center; padding: 0 12px; border-left: 1px solid var(--line); font: 400 13px var(--mono); color: var(--ink-3); font-style: normal; }
.seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line-2); border-radius: 4px; overflow: hidden; margin-bottom: 16px; }
.seg button { border: 0; background: var(--surface); padding: 9px 14px; font: 400 14px var(--sans); color: var(--ink-2); cursor: pointer; transition: background-color 150ms var(--ease), color 150ms var(--ease); }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.res { display: grid; gap: 2px; padding: 12px 0; border-bottom: 1px solid rgba(238,241,233,.14); }
.res:last-of-type { border-bottom: 0; }
.res span { font-size: 13px; color: var(--silk-2); }
.res b { font: 700 40px/1.05 var(--display); letter-spacing: .01em; font-variant-numeric: tabular-nums; }
.res b small { font: 400 18px var(--mono); color: var(--silk-2); margin-left: 6px; }
.res em { font: 400 13px var(--mono); color: var(--silk-2); font-style: normal; }
.res--pair { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); column-gap: 16px; }
.res--pair > div { display: grid; gap: 2px; align-content: start; }
.note { margin-top: 14px; padding: 10px 12px; border-radius: 4px; background: rgba(212,178,90,.14); color: #F1DFA9; font-size: 13px; line-height: 1.45; }
.note:empty { display: none; }
.hint { font-size: 13px; color: var(--ink-3); margin-top: 12px; }

/* tablas de resultados (BOM, CPL, valores normalizados) */
.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
.tbl th { text-align: left; font: 400 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: .06em; padding: 8px 10px; border-bottom: 1px solid var(--line-2); }
.tbl td { padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; overflow-wrap: anywhere; }
.tbl td.n { font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl-wrap { overflow-x: auto; margin-top: 14px; }
.card--out .tbl th { color: var(--silk-2); border-color: rgba(238,241,233,.25); }
.card--out .tbl td { border-color: rgba(238,241,233,.12); }

/* zona para soltar archivos */
.drop { display: grid; place-items: center; gap: 8px; padding: 34px 20px; border: 1.5px dashed var(--line-2); border-radius: 8px; text-align: center; cursor: pointer;
  transition: border-color 150ms var(--ease), background-color 150ms var(--ease); }
.drop:hover, .drop.is-over { border-color: var(--mask); background: rgba(30,107,71,.05); }
.drop b { font: 600 22px var(--display); }
.drop span { font-size: 14px; color: var(--ink-3); }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.files { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.files span { font: 400 12px var(--mono); padding: 3px 8px; border-radius: 3px; background: var(--paper-2); color: var(--ink-2); }
.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.stats { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 14px; font: 400 13px var(--mono); color: var(--ink-2); }
.stats b { color: var(--ink); font-weight: 700; }
textarea.paste { width: 100%; min-height: 120px; margin-top: 12px; padding: 10px 12px; border: 1px solid var(--line-2); border-radius: 4px; font: 400 13px/1.5 var(--mono); resize: vertical; background: var(--surface); color: var(--ink); }

/* texto explicativo y preguntas */
.doc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 20px 48px; padding: 56px 0 24px; }
.doc section { display: grid; gap: 12px; align-content: start; }
.doc h2 { font-size: 30px; }
.doc p, .doc li { color: var(--ink-2); }
.doc ul { margin: 0; padding-left: 20px; display: grid; gap: 6px; }
.formula { padding: 14px 16px; border-radius: 6px; background: var(--surface); box-shadow: 0 0 0 1px rgba(23,32,27,.07); font: 400 15px/1.7 var(--mono); color: var(--ink); overflow-x: auto; }
.faq { display: grid; gap: 0; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 14px 0; font: 600 20px var(--display); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--ink-3); }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 14px; }

/* franja hacia el producto */
.pitch { margin: 40px 0 64px; padding: 32px; border-radius: 8px; background: var(--mask-deep); color: var(--silk); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px 32px; align-items: center; }
.pitch h2 { font-size: clamp(28px, 3.2vw, 38px); }
.pitch p { color: var(--silk-2); margin-top: 8px; max-width: 62ch; }
.pitch .btn--go { background: var(--gold); color: var(--mask-deep); }
.pitch .btn--go:hover { background: #E3C674; }

/* índice de herramientas */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; padding-bottom: 24px; }
.tile { display: grid; gap: 8px; align-content: start; padding: 22px; border-radius: 8px; background: var(--surface); text-decoration: none;
  box-shadow: 0 0 0 1px rgba(23,32,27,.07), 0 1px 2px rgba(23,32,27,.05); transition: box-shadow 200ms var(--ease), translate 200ms var(--ease); }
.tile:hover { box-shadow: 0 0 0 1px rgba(30,107,71,.4), 0 10px 24px -10px rgba(23,32,27,.25); translate: 0 -2px; }
.tile b { font: 700 26px/1.1 var(--display); }
.tile > span { color: var(--ink-2); font-size: 15px; }
.tile > em { font: 400 12px var(--mono); color: var(--mask); font-style: normal; margin-top: 4px; }

/* portada de herramientas (/tools/): utilidad pura, agrupada; cada tarjeta dice qué metes y qué te da */
.eyebrow { font: 600 12.5px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: #C07A3E; }
.hub-head { padding: 8px 0 36px; max-width: 760px; }
.hub-head h1 { font-size: clamp(40px, 5vw, 64px); margin: 10px 0 14px; }
.hub-head p { color: var(--ink-2); font-size: 18px; }
.hub-group { margin-bottom: 40px; }
.hub-group h2 { display: flex; align-items: baseline; gap: 10px; font-size: 26px; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 1px solid var(--line); }
.hub-group h2 small { font: 600 12px var(--mono); color: var(--ink-3); }
.hub-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.hub-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tcard { position: relative; display: flex; flex-direction: column; gap: 10px; padding: 22px; border-radius: 10px; background: var(--surface); text-decoration: none;
  box-shadow: 0 0 0 1px rgba(23, 32, 27, .09), var(--sh-1); transition: box-shadow .2s var(--ease), translate .2s var(--ease); }
.tcard:hover { box-shadow: 0 0 0 1px rgba(30, 107, 71, .45), 0 12px 26px -12px rgba(23, 32, 27, .28); translate: 0 -2px; }
.tcard__ic { width: 40px; height: 40px; border-radius: 9px; display: grid; place-items: center; background: #E4F1E9; color: var(--mask); }
.tcard__ic svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.tcard h3 { font-size: 25px; }
.tcard p { color: var(--ink-2); font-size: 14.5px; }
.tcard__ex { margin-top: auto; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; padding: 10px 12px; border-radius: 7px; background: var(--paper);
  border: 1px solid #E1E7E3; font: 12.5px/1.45 var(--mono); color: var(--ink-2); font-variant-numeric: tabular-nums; }
.tcard__ex i { font-style: normal; color: var(--ink-3); }
.tcard__ex b { color: var(--mask); font-weight: 600; }
.tcard em { font: 600 12.5px var(--mono); font-style: normal; color: var(--mask); }
.tcard em i { font-style: normal; display: inline-block; transition: translate .2s var(--ease); }
.tcard:hover em i { translate: 3px 0; }
.hub-strip { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 8px 0 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.hub-strip div { display: grid; gap: 2px; padding: 18px 20px 18px 0; }
.hub-strip div + div { padding-left: 20px; border-left: 1px solid var(--line); }
.hub-strip b { font: 700 22px var(--display); }
.hub-strip div > span { color: var(--ink-2); font-size: 14px; }
.cross { margin: -36px 0 56px; color: var(--ink-3); font-size: 14.5px; }
.cross a { color: var(--mask); font-weight: 700; text-decoration: none; }
.cross a:hover { text-decoration: underline; }
@media (max-width: 900px) {
  .hub-grid, .hub-grid--2, .hub-strip { grid-template-columns: 1fr; }
  .hub-strip div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
}

/* ------------------------------------------------ pie (copia de v2) */
footer { padding: 34px 0 44px; font-size: 13.5px; color: var(--ink-3); border-top: 1px solid var(--line); margin-top: 24px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; } footer a { text-decoration: none; } footer a:hover { color: var(--ink); }

@media (max-width: 900px) {
  .tool, .doc { grid-template-columns: minmax(0, 1fr); }
  .card--out { position: static; }
  .pitch { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 980px) { .top nav { display: none; } }
@media (max-width: 560px) {
  .wrap { padding: 0 16px; }
  .top .wrap { gap: 12px; } .top .btn { padding: 7px 10px; }
}
@media (max-width: 520px) {
  .fields { grid-template-columns: minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .btn, .tile, .top { transition: none; }
  .btn:active { scale: 1; }
}