/* Simulador FGTS, Material Design 3 token system.
   Seed color #0B7D4F (savings green). Light and dark, both shipped. */

:root {
  color-scheme: light dark;

  /* Shape scale */
  --shape-s: 8px;
  --shape-m: 12px;
  --shape-l: 16px;
  --shape-xl: 28px;
  --shape-full: 999px;

  /* 8pt spacing grid */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --motion-emphasized: cubic-bezier(0.2, 0, 0, 1);
}

:root[data-theme='light'] {
  --primary: #0B6B43;
  --on-primary: #FFFFFF;
  --primary-container: #9FF3C4;
  --on-primary-container: #00210F;
  --secondary: #4D6357;
  --tertiary: #3B6470;
  --surface: #FBFDF8;
  --surface-container-lowest: #FFFFFF;
  --surface-container-low: #F3F5F0;
  --surface-container: #EDEFEA;
  --surface-container-high: #E7E9E4;
  --on-surface: #181D19;
  --on-surface-variant: #404943;
  --outline: #707973;
  --outline-variant: #C0C9C1;
  --error: #BA1A1A;
  --on-error: #FFFFFF;
  --error-container: #FFDAD6;
  --on-error-container: #410002;
  --warn-container: #FFE08A;
  --on-warn-container: #3D2E00;
  --shadow: rgba(0, 0, 0, 0.12);
}

:root[data-theme='dark'] {
  --primary: #84D6A6;
  --on-primary: #00391E;
  --primary-container: #00522F;
  --on-primary-container: #9FF3C4;
  --secondary: #B3CCBD;
  --tertiary: #A3CDDA;
  --surface: #101411;
  --surface-container-lowest: #0B0F0C;
  --surface-container-low: #181D19;
  --surface-container: #1C211D;
  --surface-container-high: #262B27;
  --on-surface: #E0E3DD;
  --on-surface-variant: #C0C9C1;
  --outline: #8A938C;
  --outline-variant: #404943;
  --error: #FFB4AB;
  --on-error: #690005;
  --error-container: #93000A;
  --on-error-container: #FFDAD6;
  --warn-container: #574500;
  --on-warn-container: #FFE08A;
  --shadow: rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.numeric {
  font-variant-numeric: tabular-nums;
}

/* Layout */
.app {
  max-width: 880px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-12);
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand__mark {
  width: 40px;
  height: 40px;
  color: var(--primary);
  flex: none;
}

.title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}

.subtitle {
  margin: var(--space-1) 0 0;
  color: var(--on-surface-variant);
  font-size: 0.95rem;
}

/* Icon button */
.icon-btn {
  appearance: none;
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
  color: var(--on-surface);
  width: 44px;
  height: 44px;
  border-radius: var(--shape-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex: none;
  transition: background 200ms var(--motion-emphasized);
}

.icon-btn:hover {
  background: var(--surface-container-high);
}

.icon-btn:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.icon-btn svg {
  width: 22px;
  height: 22px;
}

/* Shared balance card */
.card {
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-l);
  padding: var(--space-6);
}

.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.field:last-child {
  margin-bottom: 0;
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--on-surface-variant);
}

.field .help {
  font-size: 0.8rem;
  color: var(--on-surface-variant);
}

.input-affix {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid var(--outline);
  border-radius: var(--shape-s);
  background: var(--surface-container-lowest);
  padding: 0 var(--space-3);
  transition: border-color 150ms var(--motion-emphasized);
}

.input-affix:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}

.input-affix .prefix {
  color: var(--on-surface-variant);
  font-weight: 600;
}

.input-affix input {
  flex: 1;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  padding: var(--space-3) 0;
  min-width: 0;
}

.input-affix input:focus {
  outline: none;
}

.shared {
  margin-bottom: var(--space-6);
}

/* Tabs */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tab {
  appearance: none;
  border: 1px solid var(--outline-variant);
  background: transparent;
  color: var(--on-surface-variant);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--shape-full);
  font: inherit;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 200ms var(--motion-emphasized), color 200ms var(--motion-emphasized);
}

.tab:hover {
  background: var(--surface-container);
}

.tab.is-active {
  background: var(--primary-container);
  color: var(--on-primary-container);
  border-color: transparent;
}

.tab:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* Panels */
.panel[hidden] {
  display: none;
}

.panel__heading {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 var(--space-4);
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: start;
}

.result {
  background: var(--surface-container);
  border-radius: var(--shape-m);
  padding: var(--space-6);
}

.result__label {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
  font-weight: 600;
}

.result__value {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: var(--space-2) 0 var(--space-4);
  color: var(--primary);
}

.result__explain {
  font-size: 0.85rem;
  color: var(--on-surface-variant);
}

.result__rows {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.result__row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
}

.result__row dt {
  color: var(--on-surface-variant);
  font-size: 0.9rem;
  margin: 0;
}

.result__row dd {
  margin: 0;
  font-weight: 600;
}

.result__row--total dd {
  color: var(--primary);
  font-size: 1.1rem;
}

/* Text button */
.text-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--primary);
  font: inherit;
  font-weight: 600;
  font-size: 0.85rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--shape-s);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: background 150ms var(--motion-emphasized);
}

.text-btn:hover {
  background: var(--surface-container-high);
}

.text-btn:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.text-btn.is-copied {
  color: var(--primary);
}

/* Lock-in callout (always visible on the aniversario tab) */
.callout {
  display: flex;
  gap: var(--space-3);
  background: var(--warn-container);
  color: var(--on-warn-container);
  border-radius: var(--shape-m);
  padding: var(--space-4);
  margin-top: var(--space-6);
}

.callout svg {
  width: 22px;
  height: 22px;
  flex: none;
}

.callout__title {
  font-weight: 700;
  margin: 0 0 var(--space-1);
  font-size: 0.95rem;
}

.callout__body {
  margin: 0;
  font-size: 0.85rem;
}

/* Locked note in the rescisao tab */
.note {
  background: var(--error-container);
  color: var(--on-error-container);
  border-radius: var(--shape-m);
  padding: var(--space-3) var(--space-4);
  font-size: 0.85rem;
  margin-top: var(--space-4);
}

/* Toggle */
.switch {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  font-size: 0.9rem;
}

.switch input {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
}

/* Series table */
.series {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--space-4);
  font-size: 0.85rem;
}

.series caption {
  text-align: left;
  font-weight: 600;
  color: var(--on-surface-variant);
  margin-bottom: var(--space-2);
}

.series th,
.series td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--outline-variant);
}

.series td:last-child,
.series th:last-child {
  text-align: right;
}

/* Disclaimer */
.disclaimer {
  margin-top: var(--space-8);
  font-size: 0.78rem;
  color: var(--on-surface-variant);
  text-align: center;
}

@media (max-width: 640px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .title {
    font-size: 1.4rem;
  }

  .result__value {
    font-size: 1.6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}

/* ── Content pages: nav, article, FAQ, footer ─────────────────────────── */

/* Header nav shared by index and content pages */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.nav-link {
  color: var(--on-surface-variant);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--shape-full);
  transition: background 200ms var(--motion-emphasized), color 200ms var(--motion-emphasized);
}

.nav-link:hover {
  background: var(--surface-container-high);
  color: var(--on-surface);
}

.nav-link:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.nav-link[aria-current='page'] {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

/* Brand link on content pages reuses .brand layout but is clickable */
a.brand {
  text-decoration: none;
  color: inherit;
}

/* Article / prose */
.article {
  max-width: 720px;
  margin: 0 auto;
  animation: page-rise 360ms var(--motion-emphasized) both;
}

.page-hero {
  margin-bottom: var(--space-8);
}

.page-hero h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-2);
}

.lede {
  color: var(--on-surface-variant);
  font-size: 1.05rem;
  margin: 0;
}

.prose h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: var(--space-8) 0 var(--space-3);
}

.prose h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: var(--space-6) 0 var(--space-2);
}

.prose p,
.prose li {
  color: var(--on-surface);
  font-size: 0.98rem;
}

.prose ol,
.prose ul {
  padding-left: var(--space-6);
  display: grid;
  gap: var(--space-2);
}

.prose a {
  color: var(--primary);
  text-underline-offset: 2px;
}

.prose .updated {
  font-size: 0.82rem;
  color: var(--on-surface-variant);
}

/* Steps card for the manual */
.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.steps li {
  position: relative;
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-m);
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-12);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  width: 28px;
  height: 28px;
  border-radius: var(--shape-full);
  background: var(--primary);
  color: var(--on-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

/* FAQ accordion built on native details/summary */
.faq {
  display: grid;
  gap: var(--space-2);
}

.faq details {
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--shape-m);
  overflow: hidden;
}

.faq summary {
  list-style: none;
  cursor: pointer;
  padding: var(--space-4);
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '';
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--on-surface-variant);
  border-bottom: 2px solid var(--on-surface-variant);
  transform: rotate(45deg);
  transition: transform 220ms var(--motion-emphasized);
  flex: none;
}

.faq details[open] summary::after {
  transform: rotate(-135deg);
}

.faq summary:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: -3px;
}

.faq details > p {
  margin: 0;
  padding: 0 var(--space-4) var(--space-4);
  color: var(--on-surface-variant);
}

.faq details[open] > p {
  animation: page-rise 240ms var(--motion-emphasized) both;
}

/* Footer shared by all pages */
.site-footer {
  border-top: 1px solid var(--outline-variant);
  margin-top: var(--space-12);
  padding: var(--space-8) var(--space-4);
}

.site-footer .wrap {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.foot-links a {
  color: var(--on-surface-variant);
  text-decoration: none;
  font-size: 0.88rem;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--shape-full);
  transition: color 200ms var(--motion-emphasized);
}

.foot-links a:hover {
  color: var(--on-surface);
}

.foot-note {
  font-size: 0.82rem;
  color: var(--on-surface-variant);
}

@keyframes page-rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .site-footer .wrap {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-hero h1 {
    font-size: 1.6rem;
  }
}