:root {
  --ink: #12324a;
  --ink-deep: #0b2335;
  --paper: #f7f8f4;
  --paper-warm: #fffdf8;
  --line: #cbd5d8;
  --muted: #5d6d76;
  --filament: #f26b38;
  --filament-dark: #c84a1e;
  --profit: #0a7b61;
  --profit-pale: #dff3e9;
  --warning: #a33a2c;
  --shadow: 0 18px 50px rgba(11, 35, 53, .12);
  --radius: 18px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink-deep);
  background-color: var(--paper);
  background-image: linear-gradient(rgba(18, 50, 74, .035) 1px, transparent 1px), linear-gradient(90deg, rgba(18, 50, 74, .035) 1px, transparent 1px);
  background-size: 24px 24px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
button, input, select { font: inherit; }
button, select, a { touch-action: manipulation; }
button, select { cursor: pointer; }
a { color: inherit; }
.skip-link { position: fixed; top: -100px; left: 1rem; z-index: 100; padding: .75rem 1rem; background: var(--ink); color: white; }
.skip-link:focus { top: 1rem; }
:focus-visible { outline: 3px solid #ffb18f; outline-offset: 3px; }

.site-header {
  width: min(calc(100% - 2rem), var(--max));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(18, 50, 74, .18);
}
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-size: 1.25rem; font-weight: 650; letter-spacing: -.03em; }
.brand strong { color: var(--filament); }
.brand-mark { width: 34px; height: 32px; display: grid; gap: 3px; transform: skewY(-8deg); }
.brand-mark i { display: block; background: var(--ink); border-radius: 2px; }
.brand-mark i:nth-child(2) { width: 76%; background: var(--filament); }
.brand-mark i:nth-child(3) { width: 52%; }
.site-header nav { display: flex; gap: 2rem; font-size: .9rem; font-weight: 650; }
.site-header nav a { text-decoration: none; }
.site-header nav a:hover { color: var(--filament-dark); }

.hero {
  width: min(calc(100% - 2rem), var(--max));
  min-height: 560px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 7rem);
  padding: 5rem 0 6rem;
}
.eyebrow { margin: 0 0 1rem; color: var(--filament-dark); font: 750 .75rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .12em; text-transform: uppercase; }
h1, h2 { margin: 0; color: var(--ink); font-family: Georgia, "Times New Roman", serif; font-weight: 500; letter-spacing: -.055em; line-height: .99; }
h1 { font-size: clamp(2.25rem, 4.5vw, 3.8rem); max-width: 900px; line-height: 1.05; }
h1 em { color: var(--filament-dark); font-weight: 500; }
h2 { font-size: clamp(2.4rem, 5vw, 4.5rem); }
.hero-lead { max-width: 640px; margin: 2rem 0; font-size: clamp(1.1rem, 2vw, 1.35rem); color: #3e5665; }
.primary-action { display: inline-flex; align-items: center; gap: 1.5rem; padding: .9rem 1rem .9rem 1.25rem; border: 2px solid var(--ink); border-radius: 999px; text-decoration: none; font-weight: 750; }
.primary-action span { display: grid; place-items: center; width: 34px; aspect-ratio: 1; color: white; background: var(--ink); border-radius: 50%; transition: transform .2s ease; }
.primary-action:hover span { transform: translateY(3px); }

.hero-receipt { position: relative; padding: 2rem 1.75rem 2.5rem; background: var(--paper-warm); border-top: 7px solid var(--filament); box-shadow: var(--shadow); transform: rotate(2deg); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }
.receipt-top, .receipt-layer, .receipt-total { display: flex; justify-content: space-between; gap: 1rem; }
.receipt-top { padding-bottom: 1.25rem; margin-bottom: .6rem; border-bottom: 1px dashed var(--line); color: var(--muted); font-size: .72rem; }
.receipt-layer { padding: .75rem 0; font-size: .78rem; }
.receipt-layer b { color: var(--profit); }
.receipt-total { align-items: flex-end; margin-top: 1rem; padding-top: 1.2rem; border-top: 2px solid var(--ink); text-transform: uppercase; }
.receipt-total strong { color: var(--profit); font-size: 1.2rem; }
.receipt-tear { position: absolute; inset: auto 0 -9px; height: 18px; background: linear-gradient(135deg, var(--paper-warm) 9px, transparent 0) 0 0/18px 18px repeat-x; }

.ad-unit { width: min(calc(100% - 2rem), 970px); min-height: 110px; margin: 0 auto; display: grid; place-items: center; background: rgba(255,255,255,.6); border: 1px dashed #aebcc1; color: #77868d; overflow: hidden; }
.ad-unit > span { align-self: end; padding: .35rem; font: 600 .62rem/1 ui-monospace, monospace; letter-spacing: .1em; text-transform: uppercase; }
.adsterra-mobile-banner { min-height: 110px; }
.ad-unit-bottom { margin-top: 5rem; }
.ad-rail { display: grid; align-content: start; gap: 1.5rem; }
.ad-rail-right { grid-area: ads-right; }
.ad-unit.ad-unit-vertical { width: 100%; min-height: 340px; margin: 0; }

.calculator-section { padding: 7rem max(1rem, calc((100vw - 1180px) / 2)) 2rem; }
.section-intro { max-width: 800px; margin-bottom: 3rem; }
.section-intro > p:last-child { max-width: 680px; color: var(--muted); font-size: 1.05rem; }
.calculator-shell { display: grid; grid-template-columns: minmax(520px, 1.45fr) minmax(300px, .72fr) 180px; grid-template-areas: "form result ads-right"; align-items: start; gap: 1.5rem; }
.calculator-form { grid-area: form; padding: clamp(1.25rem, 3vw, 2.25rem); background: rgba(255,255,255,.88); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 6px 20px rgba(11,35,53,.05); }
fieldset { margin: 0; padding: 0 0 2.25rem; border: 0; }
fieldset + fieldset { padding-top: 2rem; border-top: 1px solid var(--line); }
legend { width: 100%; margin-bottom: 1.4rem; color: var(--ink); font-family: Georgia, serif; font-size: 1.45rem; font-weight: 700; }
legend span { display: inline-grid; place-items: center; width: 34px; height: 34px; margin-right: .55rem; color: white; background: var(--ink); border-radius: 50%; font: 700 .72rem ui-monospace, monospace; vertical-align: 3px; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.1rem; }
.field { display: grid; align-content: start; gap: .45rem; min-width: 0; }
.field-wide { grid-column: 1 / -1; }
.field > span:first-child { font-size: .95rem; font-weight: 780; }
.field small { color: var(--muted); font-size: .82rem; line-height: 1.45; }
.field select, .input-unit { width: 100%; min-height: 56px; border: 1px solid #9eafb6; border-radius: 10px; background: white; color: var(--ink-deep); transition: border-color .15s, box-shadow .15s; }
.field select { padding: 0 1rem; }
.input-unit { display: flex; align-items: center; overflow: hidden; }
.input-unit:focus-within, .field select:focus { border-color: var(--filament); box-shadow: 0 0 0 3px rgba(242,107,56,.14); outline: none; }
.input-unit input { width: 100%; min-width: 0; height: 54px; padding: 0 1rem; border: 0; outline: 0; color: inherit; background: transparent; font-weight: 680; }
.input-unit b { padding: 0 .8rem; color: var(--muted); font: 700 .78rem ui-monospace, monospace; }
.input-unit.prefix b { padding-right: 0; }
.field-highlight .input-unit { border-color: var(--profit); background: #f2fbf7; }
.req { margin-left: .4rem; color: var(--muted); font: 600 .68rem/1 inherit; font-style: normal; letter-spacing: .01em; }
/* Só aparece depois do primeiro toque no formulário: antes disso a página fica neutra. */
.input-unit:has(input[aria-invalid="true"]) { border-color: #ff9b8d; box-shadow: 0 0 0 1px rgba(255, 155, 141, .25); }
.input-unit:has(input[aria-invalid="true"]) b { color: #ffb4a6; }
.advanced-toggle { width: 100%; min-height: 54px; display: flex; justify-content: space-between; margin: 0 0 2rem; padding: 1rem 0; border: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; color: var(--ink); font-size: .95rem; font-weight: 780; }
.advanced-toggle span { font-size: 1.25rem; }
#advanced-fields[hidden] { display: none; }
.form-actions { display: flex; align-items: center; gap: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
.form-actions button { min-height: 46px; padding: .7rem 1rem; border: 1px solid var(--line); border-radius: 9px; background: white; color: var(--ink); font-weight: 750; }

.result-column { grid-area: result; position: sticky; top: 1rem; }
.result-card { color: white; background: var(--ink); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.result-head { padding: 2rem 2rem 1.5rem; background: var(--ink-deep); }
.result-head p { margin: 0 0 .35rem; color: #c4d5de; font-size: .8rem; font-weight: 750; text-transform: uppercase; letter-spacing: .08em; }
.result-head h3 { margin: 0; color: white; font-family: Georgia, serif; font-size: clamp(2.5rem, 5vw, 4.1rem); letter-spacing: -.06em; line-height: 1; }
.result-head > span { color: #c4d5de; font-size: .85rem; }
.calculation-error { margin: 1.25rem 1.5rem 0; padding: .8rem; border: 1px solid #ff9b8d; border-radius: 6px; background: #6d241b; font-size: .8rem; }
.result-list { margin: 0; padding: 1.25rem 2rem; }
.result-list > div { display: flex; justify-content: space-between; gap: 1rem; padding: .58rem 0; color: #dbe6eb; font-size: .9rem; }
.result-list dt, .result-list dd { margin: 0; }
.result-list dd { color: white; font-family: ui-monospace, monospace; font-variant-numeric: tabular-nums; text-align: right; }
.result-list .result-subtotal { margin-top: .6rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.2); font-weight: 800; }
.profit-stamp { margin: 0 1.5rem; padding: 1.2rem 1.35rem; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 0 1rem; color: #064938; background: var(--profit-pale); border-radius: 10px; transform: rotate(-1deg); }
.profit-stamp span { font-size: .72rem; font-weight: 750; text-transform: uppercase; letter-spacing: .05em; }
.profit-stamp strong { grid-row: span 2; font: 700 1.5rem Georgia, serif; }
.profit-stamp small { font-size: .7rem; }
.result-actions { display: flex; align-items: center; gap: .8rem; padding: 1.5rem 1.5rem .5rem; }
.result-actions button { min-height: 48px; padding: .72rem 1.1rem; color: white; background: transparent; border: 1px solid rgba(255,255,255,.5); border-radius: 999px; font-size: .88rem; font-weight: 780; }
.result-actions button:hover { background: white; color: var(--ink); }
.result-actions span { color: #a9c8bb; font-size: .7rem; }
.result-note { margin: 0; padding: .8rem 1.5rem 1.5rem; color: #b8c9d2; font-size: .78rem; }
.result-support-note { display: flex; align-items: flex-start; gap: .55rem; margin: .9rem .35rem 0; color: var(--muted); font-size: .82rem; line-height: 1.45; }
.result-support-note span { color: var(--filament); font-size: .85rem; }

.method-section, .content-section, .faq-section { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; padding: 7rem 0 2rem; }
.method-heading { display: grid; grid-template-columns: .7fr 1.3fr; align-items: end; gap: 2rem; }
.cost-layers { margin-top: 4rem; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.cost-layers article { min-height: 220px; padding: 1.6rem; background: rgba(255,255,255,.58); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cost-layers article > span { color: var(--filament-dark); font: 700 .72rem ui-monospace, monospace; }
.cost-layers h3 { margin: 2.6rem 0 .5rem; color: var(--ink); font: 700 1.25rem Georgia, serif; }
.cost-layers p { margin: 0; color: var(--muted); font-size: .85rem; }
.formula-card { margin-top: 2rem; padding: 2rem; color: white; background: var(--ink); border-radius: 12px; }
.formula-card p { margin: 0 0 .5rem; color: #a9bdc9; font: 700 .7rem ui-monospace, monospace; text-transform: uppercase; letter-spacing: .1em; }
.formula-card strong { display: block; font: 500 clamp(1.3rem, 3vw, 2.2rem) Georgia, serif; }
.formula-card span { display: block; margin-top: 1rem; color: #c8d7df; font-size: .8rem; }

.content-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(2rem, 8vw, 8rem); }
.content-section h2 { font-size: clamp(2.2rem, 4vw, 3.7rem); }
.article-copy { color: #3f5664; font-size: 1.02rem; }
.article-copy p:first-child { margin-top: 0; }

.affiliate-recommendations { width: min(calc(100% - 2rem), var(--max)); margin: 0 auto; padding: .75rem 0 1rem; }
.affiliate-heading { max-width: 760px; margin-bottom: 1.5rem; }
.affiliate-heading h2 { font-size: clamp(1.8rem, 3.5vw, 2.7rem); }
.affiliate-heading > p:last-child { margin: .8rem 0 0; color: var(--muted); font-size: 1rem; }
.affiliate-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.affiliate-card { min-width: 0; display: flex; flex-direction: column; align-items: flex-start; padding: 1.5rem; background: rgba(255,255,255,.85); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 6px 20px rgba(11,35,53,.05); }
.affiliate-card img { display: block; width: 100%; height: auto; aspect-ratio: 4 / 3; margin: 0 0 1.1rem; border-radius: 9px; background: #fff; object-fit: contain; }
.affiliate-label { color: var(--filament-dark); font-size: .78rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.affiliate-card h3 { flex: 1; margin: .8rem 0 1.25rem; color: var(--ink); font-size: 1.12rem; line-height: 1.45; }
.affiliate-code { margin: -.5rem 0 1rem; color: var(--muted); font-size: .85rem; }
.affiliate-card a { display: inline-flex; align-items: center; gap: .7rem; min-height: 46px; padding: .65rem 1rem; color: white; background: var(--ink); border-radius: 8px; font-size: .94rem; font-weight: 750; text-decoration: none; }
.affiliate-card a:hover { background: var(--filament-dark); }
.affiliate-disclosure { max-width: 850px; margin: 1rem 0 0; color: var(--muted); font-size: .78rem; line-height: 1.55; }

.faq-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: clamp(2rem, 7vw, 7rem); padding-bottom: 7rem; }
.faq-section h2 { font-size: clamp(2.3rem, 4vw, 3.8rem); }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 1.25rem 2rem 1.25rem 0; color: var(--ink); font-weight: 750; cursor: pointer; }
.faq-list p { margin: 0; padding: 0 1.5rem 1.25rem 0; color: var(--muted); }

footer { padding: 2.5rem 1rem; color: #bdcbd3; background: var(--ink-deep); text-align: center; }
.brand-footer { color: white; }
.brand-footer .brand-mark i { background: white; }
.brand-footer .brand-mark i:nth-child(2) { background: var(--filament); }
footer p { max-width: 660px; margin: .35rem auto; font-size: .78rem; }

@media (max-width: 1180px) {
  .calculator-shell { grid-template-columns: minmax(0, 1.4fr) minmax(300px, .7fr); grid-template-areas: "form result" "ads-right ads-right"; }
  .ad-rail { grid-template-columns: 1fr; }
  .ad-unit.ad-unit-vertical { min-height: 340px; }
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-receipt { max-width: 420px; }
  .calculator-shell { grid-template-columns: 1fr; grid-template-areas: "form" "result" "ads-right"; }
  .result-column { position: relative; top: auto; }
  .method-heading, .content-section, .faq-section { grid-template-columns: 1fr; }
  .affiliate-grid { grid-template-columns: 1fr; }
  .cost-layers { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 620px) {
  .site-header > .eyebrow { display: none; }
  .site-header nav a:not(:first-child) { display: none; }
  .hero { padding: 3.5rem 0 4rem; }
  h1 { font-size: clamp(2rem, 9vw, 2.75rem); }
  .calculator-section { padding-top: 5rem; }
  .field-grid { grid-template-columns: 1fr; }
  .field-wide { grid-column: auto; }
  .calculator-form { padding: 1rem; }
  .cost-layers { grid-template-columns: 1fr; }
  .cost-layers article { min-height: auto; }
  .method-section, .content-section, .faq-section { padding-top: 5rem; }
  .form-actions { align-items: flex-start; flex-direction: column; }
  .profit-stamp { grid-template-columns: 1fr; }
  .profit-stamp strong { grid-row: auto; margin-top: .3rem; }
  .ad-rail { grid-template-columns: 1fr; }
  .ad-unit.ad-unit-vertical { min-height: 340px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header, .hero, .ad-unit, .method-section, .content-section, .faq-section, footer, .calculator-form, .result-actions { display: none !important; }
  .calculator-section { padding: 0; }
  .calculator-shell { display: block; }
  .result-card { color: black; background: white; box-shadow: none; }
}