/* Aguirre Aprende: una pregunta, una hoja y un recurso real. */
:root {
  --ink: #163a35;
  --desk: #f4f8f5;
  --paper: #ffffff;
  --data: #3e755a;
  --formula: #425fc5;
  --line: #d7e1d9;
  --muted: #566a59;
  --error: #9c3627;
  --body-font: "Trebuchet MS", Verdana, sans-serif;
  --display-font: Georgia, "Times New Roman", serif;
  --content-width: 1240px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
[id] { scroll-margin-top: 24px; }
body { margin: 0; background: var(--desk); color: var(--ink); font-family: var(--body-font); font-size: 16px; line-height: 1.6; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a, summary { touch-action: manipulation; }
a, button, input, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible, .table-scroll:focus-visible { outline: 3px solid var(--formula); outline-offset: 5px; }
button { cursor: pointer; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2 { font-family: var(--display-font); font-weight: 400; }
p { max-width: 70ch; }
.wrap { width: min(var(--content-width), calc(100% - 96px)); margin-inline: auto; }
.header { min-height: 108px; display: flex; justify-content: space-between; align-items: center; gap: 32px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; font-size: 23px; font-weight: 700; line-height: 1; letter-spacing: -.7px; }
.brand-mark { width: 43px; height: 46px; display: grid; place-items: center; background: var(--ink); color: var(--paper); font-family: var(--display-font); font-size: 41px; letter-spacing: -4px; padding: 0 5px 8px 0; border-radius: 3px 11px 3px 3px; }
.brand-sub { display: block; font-size: 13px; font-weight: 400; letter-spacing: 3px; line-height: 1.9; }
.header nav { display: flex; gap: 30px; align-items: center; font-size: 14px; }
.header nav a:not(.nav-cta):hover { text-decoration: underline; text-underline-offset: 5px; }
.nav-cta { border: 1px solid var(--ink); padding: 10px 16px; border-radius: 3px; }
.nav-cta:hover { background: var(--ink); color: var(--paper); }
.hero { display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 78px; padding-block: 66px 90px; }
.resource-context { font-size: 15px; color: var(--muted); margin-bottom: 24px; }
h1 { font-size: clamp(54px, 5.6vw, 81px); line-height: 1.025; letter-spacing: -3.5px; margin-bottom: 25px; }
.intro { max-width: 39ch; color: var(--muted); font-size: 17px; line-height: 1.75; margin-bottom: 27px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 52px; padding: 13px 23px; border: 1px solid var(--ink); border-radius: 3px; background: var(--ink); color: var(--paper); font-size: 15px; font-weight: 700; }
.button:hover { background: #2c5148; }
.download-note { font-size: 12px; color: var(--muted); margin-top: 12px; }
.quiet-link { display: inline-block; font-size: 13px; margin-top: 24px; text-decoration: underline; text-underline-offset: 4px; }
.worksheet { min-width: 0; position: relative; background: var(--paper); border: 1px solid #c6d4c9; border-top: 5px solid var(--ink); border-radius: 3px; box-shadow: 12px 14px 0 #e5ede7; }
.sheet-file { display: flex; align-items: center; gap: 8px; padding: 11px 23px; border-bottom: 1px solid var(--line); background: #f8fbf8; font-size: 12px; }
.file-symbol { color: var(--data); font-size: 22px; line-height: 1; }
.example-label { margin-left: auto; color: var(--muted); font-size: 11px; }
.sheet-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; padding: 24px 26px 23px; }
.sheet-section { font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.sheet-heading h2 { font-family: var(--body-font); font-size: 26px; line-height: 1.2; font-weight: 400; letter-spacing: -.65px; }
.sheet-unit { font-size: 12px; color: var(--muted); }
.sheet-form { padding: 0 26px; }
.sheet-columns, .sheet-field { display: grid; grid-template-columns: 25px minmax(0, 1fr) 150px; }
.sheet-columns { color: var(--muted); background: #eef4ef; border: 1px solid var(--line); font-size: 10px; text-align: center; }
.sheet-columns span { padding: 3px 0; border-right: 1px solid var(--line); }
.sheet-columns span:last-child { border: 0; }
.sheet-field { align-items: center; border-bottom: 1px solid var(--line); min-height: 58px; }
.row-address { font-size: 10px; color: var(--muted); text-align: center; }
.sheet-field label { padding-left: 12px; font-size: 13px; }
.input-wrap { position: relative; padding: 6px 0 6px 8px; }
.input-wrap span { position: absolute; left: 20px; top: 15px; color: var(--muted); font-size: 15px; }
.input-wrap input { min-width: 0; width: 100%; background: var(--paper); border: 1px solid #7a8572; border-radius: 2px; padding: 8px 8px 8px 27px; color: var(--ink); font-size: 16px; font-variant-numeric: tabular-nums; line-height: 1.4; }
.input-wrap input[aria-invalid="true"] { border: 2px solid var(--error); }
.sheet-form-footer { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 10px; padding: 12px 0 16px; }
.small-note { font-size: 11px; color: var(--muted); }
.calculator-submit { padding: 5px 0; border: 0; border-bottom: 1px solid var(--ink); background: transparent; font-size: 12px; color: var(--ink); }
.calculator-submit:hover { color: var(--formula); border-color: var(--formula); }
.input-error { color: var(--error); font-size: 13px; padding: 0 0 15px; }
.formula-line { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; border-block: 1px solid var(--line); background: #f3f5fc; padding: 10px 26px; font-size: 12px; }
.formula-cell { color: var(--formula); border-right: 1px solid #c6cdeb; padding-right: 12px; }
.formula-expression { color: var(--formula); font-size: 15px; }
.formula-description { margin-left: auto; color: var(--muted); font-size: 10px; }
.balance-result { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; column-gap: 15px; row-gap: 5px; margin: 20px 26px 0; padding: 15px 17px 13px; border: 2px solid var(--formula); position: relative; }
.balance-result::after { content: ""; position: absolute; width: 7px; height: 7px; right: -4px; bottom: -4px; background: var(--formula); border: 1px solid var(--paper); }
.result-label { font-size: 14px; }
.balance-result output { color: var(--ink); font-size: 34px; line-height: 1.2; letter-spacing: -1px; font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.balance-result p { grid-column: 1 / -1; color: var(--muted); font-size: 11px; }
.balance-result.negative output { color: var(--error); }
.sheet-footnote { margin: 14px 26px 22px; color: var(--muted); font-size: 10px; line-height: 1.65; }
.section { padding-block: 70px; }
h2 { font-size: clamp(35px, 3.6vw, 49px); line-height: 1.12; letter-spacing: -1.4px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 36px; margin-bottom: 35px; }
.section-heading > p { color: var(--muted); font-size: 14px; line-height: 1.75; max-width: 32ch; }
.worked-example { background: #e8f0ea; border-block: 1px solid var(--line); }
.example-layout { display: grid; grid-template-columns: 1.45fr .75fr; gap: 70px; align-items: start; }
.ledger { min-width: 0; background: var(--paper); border: 1px solid #c6d4c9; }
.ledger figcaption { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 15px 20px; border-bottom: 1px solid var(--line); font-size: 14px; }
.ledger-caption-note { color: var(--muted); font-size: 11px; }
.table-scroll { overflow-x: auto; scrollbar-color: var(--muted) #edf3ee; }
.movements-table { width: 100%; min-width: 480px; border-collapse: collapse; font-size: 12px; }
.movements-table th { font-weight: 400; color: var(--muted); background: #f6f9f6; text-align: left; }
.movements-table th, .movements-table td { padding: 13px 17px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.movements-table td:first-child { color: var(--muted); font-size: 11px; }
.movements-table th:last-child, .movements-table td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.movement-type { display: inline-flex; align-items: center; gap: 7px; }
.movement-type::before { content: ""; width: 6px; height: 6px; background: var(--data); }
.expense-type::before { background: var(--formula); }
.ledger-totals { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 16px 30px; padding: 16px 20px; font-size: 11px; color: var(--muted); }
.ledger-totals strong { display: block; color: var(--ink); font-size: 17px; font-weight: 400; font-variant-numeric: tabular-nums; }
.method { padding-top: 5px; }
h3 { font-size: 27px; line-height: 1.2; font-weight: 400; letter-spacing: -.6px; }
.steps { list-style: none; counter-reset: learn; padding: 0; margin: 24px 0; }
.steps li { position: relative; padding-left: 34px; margin-bottom: 21px; counter-increment: learn; }
.steps li::before { content: counter(learn); position: absolute; left: 0; top: 1px; color: var(--formula); font-family: var(--display-font); font-size: 19px; }
.steps strong { display: block; font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.steps span { display: block; color: var(--muted); font-size: 13px; line-height: 1.7; }
.text-link { display: inline-block; font-size: 13px; border-bottom: 1px solid var(--ink); padding-bottom: 5px; }
.text-link:hover, .resource-action:hover, .secondary-link:hover { color: var(--formula); border-color: var(--formula); }
.resource-library .section-heading { margin-bottom: 38px; }
.resource-list { border-top: 1px solid var(--ink); }
.resource-row { display: grid; grid-template-columns: .65fr 2.4fr 1fr; gap: 40px; align-items: start; border-bottom: 1px solid var(--line); padding-block: 29px; }
.resource-format { font-size: 12px; color: var(--muted); padding-top: 6px; }
.resource-copy h3 { font-size: 24px; margin-bottom: 9px; }
.resource-copy p { font-size: 14px; color: var(--muted); max-width: 57ch; }
.resource-action { justify-self: end; margin-top: 6px; border-bottom: 1px solid var(--ink); padding-bottom: 5px; font-size: 13px; white-space: nowrap; }
.secondary-link { display: inline-block; font-size: 12px; color: var(--muted); text-decoration: underline; text-underline-offset: 4px; margin-top: 13px; }
.privacy { padding-block: 0 38px; font-size: 13px; color: var(--muted); }
.privacy summary { cursor: pointer; max-width: max-content; }
.privacy details p { max-width: 85ch; line-height: 1.8; margin-top: 14px; }
.footer { display: flex; align-items: center; justify-content: space-between; gap: 25px; border-top: 1px solid var(--line); padding-block: 27px 33px; }
.footer .brand { font-size: 17px; }
.footer .brand-mark { width: 33px; height: 36px; font-size: 31px; border-radius: 2px 8px 2px 2px; }
.footer .brand-sub { font-size: 10px; letter-spacing: 2.1px; }
.footer > p, .footer > a:last-child { font-size: 12px; color: var(--muted); }
.skip { position: absolute; top: -90px; left: 20px; z-index: 5; padding: 12px 18px; background: var(--ink); color: var(--paper); }
.skip:focus { top: 10px; }
.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; }
.guide { max-width: 840px; padding-block: 60px 80px; }
.guide h1 { font-size: clamp(42px, 5vw, 65px); margin-block: 18px 25px; letter-spacing: -2px; }
.guide .intro { max-width: 62ch; }
.guide h2 { font-family: var(--body-font); font-size: 27px; line-height: 1.3; letter-spacing: -.7px; margin-block: 38px 15px; }
.guide p, .guide li { color: var(--muted); font-size: 15px; line-height: 1.85; margin-block: 14px; }
.guide strong { color: var(--ink); }
.guide pre { margin-block: 20px; overflow-x: auto; padding: 18px 20px; background: var(--paper); border: 1px solid var(--line); border-left: 3px solid var(--formula); color: var(--formula); font-size: 13px; }
.guide code { font-family: Consolas, "Courier New", monospace; }
.guide .button { color: var(--paper); margin-top: 20px; }
.guide p a { text-decoration: underline; text-underline-offset: 4px; color: var(--ink); }
.eyebrow { font-size: 13px; color: var(--muted); letter-spacing: 0; }
.guide .example-note { padding: 17px 20px; background: #e8f0ea; border-left: 3px solid var(--data); }
.guide .guide-toc { display: flex; gap: 20px; flex-wrap: wrap; font-size: 13px; border-block: 1px solid var(--line); padding-block: 16px; margin-block: 28px; }
.guide-toc a { text-decoration: underline; text-underline-offset: 4px; }
.guide .guide-table { border-collapse: collapse; width: 100%; background: var(--paper); font-size: 14px; margin-block: 25px; }
.guide-table th, .guide-table td { padding: 12px 16px; text-align: left; border: 1px solid var(--line); }
.guide-table th { font-weight: 400; }
.guide .download-panel { margin-top: 40px; padding-top: 25px; border-top: 1px solid var(--ink); }
.guide .download-panel h2 { margin-top: 0; }
@media (max-width: 1100px) {
  .wrap { width: calc(100% - 64px); }
  .hero { gap: 42px; }
  h1 { font-size: 66px; }
  .sheet-heading { padding-inline: 20px; }
  .sheet-form { padding-inline: 20px; }
  .sheet-columns, .sheet-field { grid-template-columns: 22px minmax(0, 1fr) 128px; }
  .sheet-field label { font-size: 12px; padding-left: 8px; }
  .formula-line { padding-inline: 20px; }
  .formula-description { margin-left: 0; }
  .balance-result { margin-inline: 20px; }
  .balance-result output { font-size: 30px; }
  .sheet-footnote { margin-inline: 20px; }
  .example-layout { gap: 40px; grid-template-columns: 1.35fr .8fr; }
  .resource-row { gap: 24px; grid-template-columns: .7fr 2fr 1fr; }
}
@media (max-width: 850px) {
  .hero { gap: 38px; grid-template-columns: 1fr 1.15fr; padding-block: 48px 65px; }
  h1 { font-size: 56px; letter-spacing: -2.6px; }
  .intro { font-size: 15px; }
  .sheet-file { padding-inline: 17px; flex-wrap: wrap; column-gap: 7px; row-gap: 0; }
  .example-label { margin-left: 0; flex-basis: 100%; padding-left: 25px; }
  .sheet-heading h2 { font-size: 23px; }
  .sheet-columns, .sheet-field { grid-template-columns: 19px minmax(0, 1fr) 116px; }
  .sheet-field label { font-size: 11px; padding-left: 5px; }
  .balance-result { grid-template-columns: 1fr; row-gap: 8px; }
  .balance-result p { grid-column: 1; }
  .example-layout { grid-template-columns: 1fr; gap: 32px; }
  .method { display: grid; grid-template-columns: .8fr 1.2fr; column-gap: 38px; }
  .method .steps { margin: 0; grid-row: span 2; }
  .method .text-link { align-self: end; justify-self: start; }
}
@media (max-width: 650px) {
  .wrap { width: calc(100% - 40px); }
  .header { min-height: 86px; gap: 18px; }
  .brand { font-size: 20px; gap: 9px; }
  .brand-mark { width: 35px; height: 38px; font-size: 34px; }
  .brand-sub { font-size: 11px; letter-spacing: 2.4px; }
  .header nav { gap: 16px; font-size: 12px; }
  .header nav > a:first-child { display: none; }
  .nav-cta { padding: 9px 10px; font-size: 11px; }
  .hero { grid-template-columns: 1fr; padding-block: 36px 58px; gap: 37px; }
  .resource-context { font-size: 13px; margin-bottom: 20px; }
  h1 { font-size: clamp(52px, 12.6vw, 72px); line-height: 1.04; letter-spacing: -2.5px; margin-bottom: 23px; }
  .intro { font-size: 16px; max-width: 38ch; margin-bottom: 23px; }
  .hero-copy .button { width: 100%; }
  .download-note { font-size: 11px; text-align: center; }
  .quiet-link { margin-top: 18px; font-size: 12px; }
  .worksheet { box-shadow: 7px 9px 0 #e5ede7; }
  .sheet-file { padding: 10px 17px; flex-wrap: nowrap; font-size: 10px; gap: 7px; }
  .example-label { flex-basis: auto; margin-left: auto; padding-left: 0; font-size: 9px; }
  .sheet-heading { padding: 22px 17px 20px; }
  .sheet-heading h2 { font-size: 25px; }
  .sheet-form { padding-inline: 17px; }
  .sheet-columns, .sheet-field { grid-template-columns: 20px minmax(0, 1fr) 125px; }
  .sheet-field label { padding-left: 7px; font-size: 12px; }
  .sheet-form-footer { padding-bottom: 14px; gap: 8px; }
  .small-note { font-size: 10px; }
  .calculator-submit { font-size: 11px; }
  .formula-line { padding: 10px 17px; gap: 8px; }
  .formula-description { margin-left: auto; font-size: 9px; }
  .balance-result { grid-template-columns: 1fr; margin: 18px 17px 0; padding: 14px 12px; gap: 8px; }
  .result-label { font-size: 12px; }
  .balance-result output { font-size: 29px; }
  .balance-result p { grid-column: 1 / -1; font-size: 10px; }
  .sheet-footnote { margin: 13px 17px 20px; font-size: 10px; }
  .section { padding-block: 47px; }
  h2 { font-size: 36px; letter-spacing: -1.1px; }
  .section-heading { display: block; margin-bottom: 25px; }
  .section-heading > p { margin-top: 16px; font-size: 13px; }
  .ledger figcaption { padding: 13px 15px; font-size: 13px; }
  .ledger-caption-note { font-size: 10px; }
  .movements-table { min-width: 0; font-size: 11px; }
  .movements-table th, .movements-table td { padding: 12px 10px; }
  .movements-table th:first-child, .movements-table td:first-child { display: none; }
  .movements-table td:nth-child(3) { white-space: normal; }
  .ledger-totals { padding: 14px 15px; font-size: 10px; }
  .ledger-totals strong { font-size: 16px; }
  .method { display: block; }
  .method h3 { font-size: 28px; }
  .method .steps { margin-block: 24px; }
  .steps span { font-size: 14px; }
  .resource-library .section-heading { margin-bottom: 26px; }
  .resource-row { grid-template-columns: 1fr; gap: 12px; padding-block: 24px; }
  .resource-format { padding: 0; font-size: 11px; }
  .resource-copy h3 { font-size: 25px; }
  .resource-copy p { font-size: 13px; }
  .resource-action { justify-self: start; margin-top: 5px; font-size: 13px; }
  .secondary-link { font-size: 12px; }
  .privacy { padding-bottom: 30px; font-size: 12px; }
  .footer { flex-wrap: wrap; padding-block: 25px; gap: 20px; }
  .footer > p { order: 3; width: 100%; font-size: 11px; }
  .guide { padding-block: 38px 55px; }
  .guide h1 { font-size: 43px; letter-spacing: -1.8px; }
  .guide h2 { font-size: 25px; }
  .guide p, .guide li { font-size: 15px; }
  .guide pre { font-size: 13px; padding: 16px; }
  .guide .guide-toc { gap: 10px 18px; }
}
@media (max-width: 370px) {
  .header nav > a:nth-child(2) { display: none; }
  .sheet-columns, .sheet-field { grid-template-columns: 16px minmax(0, 1fr) 113px; }
  .sheet-field label { padding-left: 5px; font-size: 11px; }
  .formula-description { flex-basis: 100%; margin-left: 0; }
  .balance-result { grid-template-columns: 1fr; }
  .balance-result p { grid-column: 1; }
  .example-label { font-size: 8px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }