/* ============================================================
   SEXTANTE SISTEMAS — folha de especificação de engenharia
   Registro: corporativo-formal B2B. Paradigma: prancha técnica.
   Régua (esq) | corpo (centro) | marginalia (dir, só ≥1536px)
   ============================================================ */

:root {
  /* Base escura full-bleed */
  --tinta: #16181D;
  --ardosia: #2A2F38;
  /* Neutros quentes de superfície */
  --papel: #F4F1EC;
  --osso: #FBFAF7;
  /* Texto */
  --texto: #22252B;
  --texto-claro: #F4F1EC;
  --secundario: #5B6673;
  /* Acento único */
  --cobalto: #1F4E8C;
  /* Hairlines */
  --fio: #C9C4B8;
  --fio-escuro: rgba(255, 255, 255, 0.14);

  --ruler-w: 84px;
  --shell: min(92vw, 1680px);
  --gap: 36px;
}

* { box-sizing: border-box; }

html, body {
  overflow-x: hidden;
  max-width: 100%;
}

body {
  margin: 0;
  background: var(--osso);
  color: var(--texto);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 500;
  font-variation-settings: "opsz" 24;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
  color: inherit;
}

p { margin: 0 0 1em; }
a { color: var(--cobalto); text-decoration: none; }

/* Foco visível cobalto em tudo */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--cobalto);
  outline-offset: 2px;
}

.mono {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
}

.label {
  font-family: "IBM Plex Mono", ui-monospace, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--secundario);
}

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

/* ------------------------------------------------------------
   SKIP LINK
   ------------------------------------------------------------ */
.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--cobalto);
  color: #fff;
  padding: 10px 16px;
  z-index: 200;
}
.skip:focus { left: 8px; top: 8px; }

/* ------------------------------------------------------------
   TOPO / NAV MULTIPÁGINA
   ------------------------------------------------------------ */
.topbar {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(251, 250, 247, 0.92);
  backdrop-filter: saturate(1.1) blur(6px);
  border-bottom: 1px solid var(--fio);
}
.topbar__inner {
  width: var(--shell);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 0 4px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--texto);
}
.brand__mark {
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}
.brand__code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  color: var(--secundario);
}
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  color: var(--secundario);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  padding: 10px 12px;
  border-radius: 2px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav a:hover { color: var(--texto); }
.nav a[aria-current="page"] {
  color: var(--texto);
  box-shadow: inset 0 -2px 0 var(--cobalto);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--fio);
  background: transparent;
  color: var(--texto);
  border-radius: 2px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 20px; height: 20px; }

/* ------------------------------------------------------------
   ÍNDICE HORIZONTAL MOBILE (régua colapsada)
   ------------------------------------------------------------ */
.ruler-mobile {
  display: none;
  position: sticky;
  top: 60px;
  z-index: 80;
  background: var(--papel);
  border-bottom: 1px solid var(--fio);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.ruler-mobile ol {
  display: flex;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0 4px;
}
.ruler-mobile a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 14px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--secundario);
  white-space: nowrap;
  border-right: 1px solid var(--fio);
}
.ruler-mobile a.is-active { color: var(--cobalto); }
.ruler-mobile a.is-active b { color: var(--cobalto); }
.ruler-mobile b { color: var(--texto); font-weight: 600; }

/* ------------------------------------------------------------
   LAYOUT PRANCHA: régua | corpo | marginalia
   ------------------------------------------------------------ */
.plate {
  width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: var(--ruler-w) minmax(0, 1fr);
  column-gap: var(--gap);
}

/* Régua fixa à esquerda */
.ruler {
  position: sticky;
  top: 60px;
  align-self: start;
  height: calc(100vh - 60px);
  padding-top: 40px;
  border-right: 1px solid var(--fio);
  background: linear-gradient(90deg, var(--papel), transparent 60%);
}
.ruler__ticks {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.ruler__num {
  position: relative;
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--secundario);
  padding: 14px 0 14px 10px;
  transition: color 180ms ease;
}
.ruler__num::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 50%;
  width: 0;
  height: 1px;
  background: var(--cobalto);
  transition: width 200ms ease;
}
.ruler__num:hover { color: var(--texto); }
.ruler__num.is-active { color: var(--cobalto); }
.ruler__num.is-active::before { width: 14px; }
.ruler__num small {
  display: block;
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  color: var(--secundario);
  margin-top: 2px;
  max-width: 60px;
}

/* Corpo amplo */
.body-col { min-width: 0; padding: 0 4px; }

/* Cabeçalho tabular de seção */
.plate-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-top: 8px;
  margin-bottom: 28px;
}
.plate-head__code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--cobalto);
  white-space: nowrap;
}
.plate-head__title {
  font-size: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  white-space: nowrap;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
  color: var(--texto);
}
.plate-head__rule {
  flex: 1;
  height: 1px;
  background: var(--fio);
  align-self: center;
}

section.plate-section {
  padding: 64px 0;
  scroll-margin-top: 76px;
}

/* Alternância de superfície full-bleed */
.band {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}
.band--papel { background: var(--papel); }
.band--osso { background: var(--osso); }
.band--tinta { background: var(--tinta); color: var(--texto-claro); }
.band--ardosia { background: var(--ardosia); color: var(--texto-claro); }

.band .plate { }
.band--tinta .plate-head__title,
.band--ardosia .plate-head__title { color: var(--osso); }
.band--tinta .plate-head__rule,
.band--ardosia .plate-head__rule { background: var(--fio-escuro); }
.band--tinta .ruler,
.band--ardosia .ruler {
  border-right-color: var(--fio-escuro);
  background: linear-gradient(90deg, rgba(255,255,255,0.03), transparent 60%);
}
.band--tinta .ruler__num,
.band--ardosia .ruler__num { color: rgba(244,241,236,0.55); }
.band--tinta .ruler__num small,
.band--ardosia .ruler__num small { color: rgba(244,241,236,0.4); }

/* ------------------------------------------------------------
   MARGINALIA (3ª coluna, só ≥1536px)
   ------------------------------------------------------------ */
.margin-col { display: none; }

@media (min-width: 1536px) {
  .plate {
    grid-template-columns: var(--ruler-w) minmax(0, 1fr) 280px;
  }
  .margin-col {
    display: block;
    border-left: 1px solid var(--fio);
    padding: 8px 0 0 24px;
    align-self: start;
  }
  .band--tinta .margin-col,
  .band--ardosia .margin-col { border-left-color: var(--fio-escuro); }
  .margin-note {
    margin-bottom: 26px;
    font-size: 0.78rem;
    line-height: 1.5;
    color: var(--secundario);
  }
  .band--tinta .margin-note,
  .band--ardosia .margin-note { color: rgba(244,241,236,0.62); }
  .margin-note b {
    display: block;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--cobalto);
    margin-bottom: 4px;
  }
  .margin-fig {
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--secundario);
    border-top: 1px solid var(--fio);
    padding-top: 8px;
  }
}

@media (min-width: 1920px) {
  :root { --gap: 44px; }
  .plate { grid-template-columns: var(--ruler-w) minmax(0, 1fr) 320px; }
}

/* ------------------------------------------------------------
   CAPA / ABERTURA
   ------------------------------------------------------------ */
.cover {
  padding: 80px 0 72px;
}
.cover__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 40px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--fio);
}
.cover__meta div { min-width: 120px; }
.cover__meta dt {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--secundario);
  margin-bottom: 4px;
}
.cover__meta dd {
  margin: 0;
  font-size: 0.9rem;
  color: var(--texto);
}
.cover h1 {
  font-size: clamp(2rem, 1.4rem + 3vw, 3.6rem);
  font-variation-settings: "opsz" 40;
  max-width: 16ch;
  margin-bottom: 24px;
}
.cover__thesis {
  font-size: clamp(1.05rem, 0.98rem + 0.5vw, 1.3rem);
  max-width: 52ch;
  color: var(--texto);
  line-height: 1.55;
}
.cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid var(--cobalto);
  color: var(--cobalto);
  background: transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
}
.btn:hover { background: var(--cobalto); color: #fff; }
.btn--solid { background: var(--cobalto); color: #fff; }
.btn--solid:hover { background: #1a4278; }
.btn--ghost { border-color: var(--fio); color: var(--texto); }
.btn--ghost:hover { background: var(--papel); color: var(--texto); border-color: var(--secundario); }

/* ------------------------------------------------------------
   TABELA DE SERVIÇOS (spec)
   ------------------------------------------------------------ */
.spec-list { border-top: 1px solid var(--fio); }
.spec-row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px solid var(--fio);
  align-items: start;
}
.band--tinta .spec-list,
.band--tinta .spec-row { border-color: var(--fio-escuro); }
.spec-row__code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--cobalto);
  padding-top: 3px;
}
.spec-row h3 {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
  font-size: 1.08rem;
  margin-bottom: 8px;
  color: var(--texto);
}
.spec-row p { color: var(--secundario); max-width: 62ch; margin: 0; }
.spec-row__tags {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--secundario);
  border: 1px solid var(--fio);
  padding: 3px 8px;
  border-radius: 2px;
}

/* ------------------------------------------------------------
   PROCESSO (etapas numeradas)
   ------------------------------------------------------------ */
.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--fio);
  border: 1px solid var(--fio);
}
.step {
  background: var(--osso);
  padding: 30px 28px;
}
.band--papel .step { background: var(--papel); }
.step__no {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--cobalto);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.step__no::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--fio);
}
.step h3 {
  font-family: "IBM Plex Sans", sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 10px;
}
.step p { color: var(--secundario); margin: 0 0 12px; }
.step ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.step li {
  font-size: 0.86rem;
  color: var(--secundario);
  padding-left: 16px;
  position: relative;
  margin-bottom: 4px;
}
.step li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cobalto);
}

/* ------------------------------------------------------------
   CALCULADORA DE ROI (planilha de especificação)
   ------------------------------------------------------------ */
.roi {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}
.roi__intro {
  grid-column: 1 / -1;
  color: var(--secundario);
  max-width: 68ch;
  margin-bottom: 8px;
}

.params { border-top: 1px solid var(--fio); }
.param {
  padding: 20px 0;
  border-bottom: 1px solid var(--fio);
}
.param__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}
.param__label {
  font-size: 0.9rem;
  color: var(--texto);
}
.param__label b {
  font-family: "IBM Plex Mono", monospace;
  color: var(--cobalto);
  font-weight: 500;
  margin-right: 8px;
  font-size: 0.82rem;
}
.param__value {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
}
.param__value input {
  width: 92px;
  text-align: right;
  font-family: "IBM Plex Mono", monospace;
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
  color: var(--texto);
  background: var(--osso);
  border: 1px solid var(--fio);
  border-radius: 2px;
  padding: 6px 8px;
  min-height: 44px;
}
.band--papel .param__value input { background: var(--osso); }
.param__unit {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.74rem;
  color: var(--secundario);
}

/* Range sliders acessíveis */
.param input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 44px; /* touch confortável */
  background: transparent;
  cursor: pointer;
  margin: 0;
}
.param input[type="range"]::-webkit-slider-runnable-track {
  height: 2px;
  background: var(--fio);
}
.param input[type="range"]::-moz-range-track {
  height: 2px;
  background: var(--fio);
}
.param input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  margin-top: -8px;
  background: var(--cobalto);
  border: 3px solid var(--osso);
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--cobalto);
}
.param input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--cobalto);
  border: 3px solid var(--osso);
  border-radius: 50%;
}

/* Leitura / mostrador */
.readout {
  border: 1px solid var(--fio);
  border-top: 2px solid var(--cobalto);
  background: var(--osso);
  padding: 0;
}
.band--papel .readout { background: var(--osso); }
.readout__cap {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 12px 20px;
  border-bottom: 1px solid var(--fio);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--secundario);
}
.readout__main {
  padding: 26px 20px 20px;
}
.readout__main .label { margin-bottom: 6px; }
.readout__big {
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(2rem, 1.4rem + 3vw, 3rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
  color: var(--texto);
  line-height: 1;
}
.readout__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--fio);
}
.readout__cell {
  padding: 16px 20px;
  border-right: 1px solid var(--fio);
}
.readout__cell:last-child { border-right: none; }
.readout__cell .label { display: block; margin-bottom: 6px; }
.readout__cell b {
  font-family: "IBM Plex Mono", monospace;
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  color: var(--texto);
}

/* Barra-fio de proporção do payback */
.payback {
  padding: 18px 20px 20px;
  border-top: 1px solid var(--fio);
}
.payback__meta {
  display: flex;
  justify-content: space-between;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--secundario);
  margin-bottom: 8px;
}
.payback__track {
  height: 6px;
  background: var(--papel);
  border: 1px solid var(--fio);
  border-radius: 1px;
  overflow: hidden;
}
.payback__fill {
  height: 100%;
  width: 0%;
  background: var(--cobalto);
  transition: width 260ms ease;
}
.payback__scale {
  display: flex;
  justify-content: space-between;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  color: var(--secundario);
  margin-top: 4px;
}

/* Memória de cálculo */
.memory {
  margin-top: 28px;
}
.memory table {
  width: 100%;
  border-collapse: collapse;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}
.memory caption {
  text-align: left;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--secundario);
  padding-bottom: 8px;
}
.memory th,
.memory td {
  padding: 9px 4px;
  border-bottom: 1px solid var(--fio);
  text-align: left;
}
.memory td:last-child,
.memory th:last-child {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--texto);
}
.memory th { color: var(--secundario); font-weight: 400; }
.memory tr:last-child td { border-bottom: none; }
.memory tr.total td {
  border-top: 1px solid var(--cobalto);
  color: var(--texto);
  font-weight: 500;
}

.seal {
  margin-top: 18px;
  border: 1px dashed var(--fio);
  padding: 12px 14px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--secundario);
  line-height: 1.5;
}
.seal b {
  color: var(--cobalto);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}

/* ------------------------------------------------------------
   PROVA / CREDENCIAIS (faixa escura + foto)
   ------------------------------------------------------------ */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--fio-escuro);
  border: 1px solid var(--fio-escuro);
  margin-bottom: 40px;
}
.metric {
  background: var(--tinta);
  padding: 26px 22px;
}
.metric b {
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(1.6rem, 1.2rem + 1.4vw, 2.2rem);
  font-variant-numeric: tabular-nums;
  color: var(--osso);
  display: block;
  line-height: 1;
  margin-bottom: 10px;
}
.metric span {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.82rem;
  color: rgba(244,241,236,0.62);
}
.metric i {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.64rem;
  letter-spacing: 0.05em;
  color: var(--cobalto);
  font-style: normal;
  margin-bottom: 8px;
}

.figure {
  position: relative;
  border-top: 1px solid var(--cobalto);
  overflow: hidden;
}
.figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.85);
}
.figure__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(22,24,29,0.86) 0%, rgba(22,24,29,0.6) 50%, rgba(22,24,29,0.4) 100%);
}
.figure__cap {
  position: absolute;
  left: 24px;
  bottom: 20px;
  right: 24px;
  color: var(--osso);
}
.figure__cap .label { color: rgba(244,241,236,0.8); margin-bottom: 6px; }
.figure__cap p {
  font-family: "Fraunces", serif;
  font-size: clamp(1.1rem, 0.9rem + 1vw, 1.5rem);
  max-width: 40ch;
  margin: 0;
}
.figure__tag {
  position: absolute;
  right: 16px;
  top: 12px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.64rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(244,241,236,0.7);
  background: rgba(22,24,29,0.6);
  border: 1px solid var(--fio-escuro);
  padding: 4px 8px;
}

/* ------------------------------------------------------------
   CONTATO (formulário)
   ------------------------------------------------------------ */
.form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  max-width: 720px;
}
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--secundario);
}
.field input,
.field textarea {
  font-family: "IBM Plex Sans", sans-serif;
  font-size: 0.95rem;
  color: var(--texto);
  background: var(--osso);
  border: 1px solid var(--fio);
  border-radius: 2px;
  padding: 12px 12px;
  min-height: 48px;
}
.band--papel .field input,
.band--papel .field textarea { background: var(--osso); }
.field textarea { min-height: 120px; resize: vertical; }
.field .err {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  color: #9a3324;
  min-height: 0;
}
.field input[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
  border-color: #9a3324;
}
.form__actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.form__note {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--secundario);
}
.form__ok {
  grid-column: 1 / -1;
  border: 1px solid var(--cobalto);
  border-left-width: 3px;
  background: var(--papel);
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--texto);
}
.band--papel .form__ok { background: var(--osso); }
.form__ok[hidden] { display: none; }

/* ------------------------------------------------------------
   RODAPÉ
   ------------------------------------------------------------ */
.foot {
  background: var(--tinta);
  color: rgba(244,241,236,0.7);
  border-top: 1px solid var(--fio-escuro);
}
.foot__inner {
  width: var(--shell);
  margin: 0 auto;
  padding: 48px 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 28px 60px;
  justify-content: space-between;
}
.foot h4 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--cobalto);
  margin-bottom: 12px;
  font-weight: 400;
}
.foot a { color: rgba(244,241,236,0.75); }
.foot a:hover { color: var(--osso); }
.foot__col p, .foot__col li { font-size: 0.85rem; margin: 0 0 6px; }
.foot__col ul { list-style: none; margin: 0; padding: 0; }
.foot__bottom {
  width: var(--shell);
  margin: 0 auto;
  padding: 16px 4px 40px;
  border-top: 1px solid var(--fio-escuro);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.7rem;
  color: rgba(244,241,236,0.62);
}

/* ------------------------------------------------------------
   WHATSAPP FLOAT
   ------------------------------------------------------------ */
.wa {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 95;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--cobalto);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(22,24,29,0.28);
}
.wa svg { width: 26px; height: 26px; }
.wa:hover { background: #1a4278; }

/* ------------------------------------------------------------
   REVEAL (fail-safe)
   ------------------------------------------------------------ */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 400ms ease, transform 400ms ease;
}
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ------------------------------------------------------------
   RESPONSIVO
   ------------------------------------------------------------ */
@media (max-width: 900px) {
  .roi { grid-template-columns: 1fr; }
  .metrics { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root { --shell: 92vw; }
  .plate {
    grid-template-columns: 1fr;
    column-gap: 0;
  }
  .ruler { display: none; }
  .ruler-mobile { display: block; }
  .nav { display: none; }
  .nav.is-open {
    display: flex;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--osso);
    border-bottom: 1px solid var(--fio);
    padding: 8px;
  }
  .nav.is-open a { min-height: 48px; }
  .nav-toggle { display: inline-flex; }
  section.plate-section { padding: 40px 0; }
  .plate-head { flex-wrap: wrap; gap: 8px 12px; }
  .plate-head__title { white-space: normal; }
  .plate-head__rule { flex-basis: 100%; }
  .form { grid-template-columns: 1fr; }
  .cover { padding: 48px 0 40px; }
  .cover__actions .btn { flex: 1; justify-content: center; }
  .readout__grid { grid-template-columns: 1fr; }
  .readout__cell { border-right: none; border-bottom: 1px solid var(--fio); }
  .readout__cell:last-child { border-bottom: none; }
}

@media (max-width: 380px) {
  body { font-size: 15px; }
  .metrics { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}