/* ============================================================
   CENTELHA — site.css
   Design system do site institucional (centelha.tech).
   HTML + CSS estáticos, sem build, sem CDN externo.
   Mesma família visual do app (app.centelha.tech): azul-marinho
   profundo, acentos âmbar, números em monoespaçada — porém em
   fundo claro, com mais respiro, para leitura de marketing.
   ============================================================ */

/* ------------------------------------------------------------
   1. Tokens
   ------------------------------------------------------------ */
:root {
  /* Tinta (derivada do tema escuro do app: #0f1b2d) */
  --ink: #0f1b2d;
  --ink-soft: #33465e;
  --ink-dim: #5b6b80;

  /* Superfícies claras */
  --paper: #ffffff;
  --paper-dim: #f5f7fa;
  --paper-deep: #ecf0f5;
  --line: #dfe5ec;
  --line-strong: #c7d0dc;

  /* Acento — a "centelha" */
  --spark: #c2540a;          /* legível sobre claro */
  --spark-deep: #9c430a;
  --spark-bright: #fb923c;   /* o âmbar do app, p/ fundos escuros */
  --spark-wash: #fdf1e7;

  /* Painéis escuros (paleta do app) */
  --navy: #0f1b2d;
  --navy-panel: #152238;
  --navy-line: #2a4060;
  --navy-text: #c8d6e5;
  --navy-dim: #6889a8;
  --navy-cyan: #22d3ee;
  --navy-green: #34d399;
  --navy-blue: #60a5fa;
  --navy-yellow: #fbbf24;

  /* Semântica */
  --ok: #0e7a4a;
  --ok-wash: #e9f6ef;
  --warn: #92610c;
  --warn-wash: #fdf5e3;

  /* Tipografia — sem fontes externas */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "IBM Plex Mono", "SF Mono", SFMono-Regular,
    Menlo, Consolas, "Liberation Mono", monospace;

  /* Métricas */
  --maxw: 1120px;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow: 0 1px 2px rgba(15, 27, 45, 0.06), 0 8px 24px rgba(15, 27, 45, 0.07);
}

/* ------------------------------------------------------------
   2. Base
   ------------------------------------------------------------ */
* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  line-height: 1.2;
  margin: 0 0 0.5em;
  letter-spacing: -0.015em;
  color: var(--ink);
}
h1 { font-size: clamp(2rem, 5vw, 3.1rem); font-weight: 750; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.1rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; }
h4 { font-size: 1rem; font-weight: 650; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--spark); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin-bottom: 0.35em; }

strong { font-weight: 650; }
small { font-size: 0.85rem; }

code, .mono {
  font-family: var(--font-mono);
  font-size: 0.88em;
}
code {
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.1em 0.35em;
  white-space: nowrap;
}

figure { margin: 0; }

:focus-visible {
  outline: 2px solid var(--spark);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Link de pular conteúdo */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--ink);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
  left: 0;
  text-decoration: none;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ------------------------------------------------------------
   3. Cabeçalho / navegação
   ------------------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand svg { display: block; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list li { margin: 0; }
.nav-list a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.92rem;
  font-weight: 550;
  color: var(--ink-soft);
  border-radius: var(--radius);
}
.nav-list a:hover {
  color: var(--ink);
  background: var(--paper-dim);
  text-decoration: none;
}
.nav-list a[aria-current="page"] {
  color: var(--spark-deep);
  background: var(--spark-wash);
}
.nav-list .nav-entrar {
  margin-left: 8px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 7px 16px;
}
.nav-list .nav-entrar:hover {
  background: var(--ink);
  color: #fff;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--ink);
}
.nav-toggle .bars {
  display: block;
  width: 20px;
  height: 14px;
  position: relative;
}
.nav-toggle .bars::before,
.nav-toggle .bars::after,
.nav-toggle .bars span {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
}
.nav-toggle .bars::before { top: 0; }
.nav-toggle .bars span { top: 6px; }
.nav-toggle .bars::after { top: 12px; }

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 8px 16px 16px;
  }
  .site-nav.open { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav-list a { display: block; padding: 12px 14px; font-size: 1rem; }
  .nav-list .nav-entrar { margin: 8px 0 0; text-align: center; }
}

/* ------------------------------------------------------------
   4. Botões e selos
   ------------------------------------------------------------ */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.btn:hover { text-decoration: none; }

.btn-primary {
  background: var(--spark);
  color: #fff;
}
.btn-primary:hover { background: var(--spark-deep); color: #fff; }

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--ink); background: var(--paper-dim); }

/* variante para fundos escuros */
.on-dark .btn-ghost {
  border-color: var(--navy-line);
  color: var(--navy-text);
}
.on-dark .btn-ghost:hover { border-color: var(--navy-text); background: var(--navy-panel); }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  background: var(--paper);
  white-space: nowrap;
}
.badge-ok { color: var(--ok); border-color: #bfe3cf; background: var(--ok-wash); }
.badge-warn { color: var(--warn); border-color: #ecd9a8; background: var(--warn-wash); }
.badge-spark { color: var(--spark-deep); border-color: #f3cfae; background: var(--spark-wash); }

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--spark);
  margin-bottom: 12px;
}

/* ------------------------------------------------------------
   5. Seções
   ------------------------------------------------------------ */
.section { padding: 80px 0; }
.section-alt { background: var(--paper-dim); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-dark {
  background: var(--navy);
  color: var(--navy-text);
}
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark a { color: var(--spark-bright); }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head .lead { font-size: 1.1rem; color: var(--ink-soft); }
.section-dark .section-head .lead { color: var(--navy-text); }

.lead { font-size: 1.15rem; color: var(--ink-soft); }

/* Hero de páginas internas */
.page-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(900px 320px at 85% -40%, var(--spark-wash), transparent 70%),
    var(--paper);
}
.page-hero .lead { max-width: 700px; }

/* ------------------------------------------------------------
   6. Grades e cartões
   ------------------------------------------------------------ */
.grid {
  display: grid;
  gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 980px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.card h3 { margin-top: 0; }
.card .badge { margin-bottom: 14px; }
.card p { color: var(--ink-soft); font-size: 0.95rem; }
.card ul { color: var(--ink-soft); font-size: 0.95rem; }

.card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--spark-deep);
  background: var(--spark-wash);
  border-radius: 4px;
  padding: 4px 8px;
  margin-bottom: 14px;
}

/* KPIs (faixa de números) */
.kpi-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--paper-dim);
  padding: 40px 0;
}
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
@media (max-width: 880px) { .kpi-grid { grid-template-columns: repeat(2, 1fr); } }
.kpi .kpi-num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.kpi .kpi-label {
  font-size: 0.88rem;
  color: var(--ink-dim);
  margin-top: 4px;
}
.kpi-note {
  margin-top: 24px;
  font-size: 0.8rem;
  color: var(--ink-dim);
}

/* ------------------------------------------------------------
   7. Tabelas
   ------------------------------------------------------------ */
.table-wrap { overflow-x: auto; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.table caption {
  caption-side: bottom;
  text-align: left;
  font-size: 0.8rem;
  color: var(--ink-dim);
  padding: 10px 2px;
}
.table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-dim);
  background: var(--paper-dim);
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
}
.table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  color: var(--ink-soft);
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: var(--paper-dim); }
.table .td-mono { font-family: var(--font-mono); font-size: 0.85rem; white-space: nowrap; color: var(--ink); }
.table .td-strong { color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------
   8. Blocos de código / mock de terminal e dashboard
   ------------------------------------------------------------ */
.code-frame {
  background: var(--navy);
  border: 1px solid var(--navy-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.code-frame .code-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--navy-line);
  background: var(--navy-panel);
}
.code-frame .code-bar .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--navy-line);
}
.code-frame .code-bar .code-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy-dim);
  margin-left: 6px;
}
.code-frame pre {
  margin: 0;
  padding: 18px 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--navy-text);
}
.code-frame .c-comment { color: var(--navy-dim); }
.code-frame .c-str { color: var(--navy-green); }
.code-frame .c-key { color: var(--navy-cyan); }
.code-frame .c-num { color: var(--navy-yellow); }
.code-frame .c-prompt { color: var(--spark-bright); }

/* Mock de painel do dashboard (CSS puro — sem screenshots) */
.mock {
  background: var(--navy);
  border: 1px solid var(--navy-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  font-family: var(--font-mono);
}
.mock-title {
  padding: 8px 14px;
  border-bottom: 1px solid var(--navy-line);
  background: var(--navy-panel);
  font-size: 0.7rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--navy-dim);
}
.mock-body { padding: 16px; display: grid; gap: 14px; }
.mock-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}
.mock-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--navy-dim);
}
.mock-value { font-size: 0.95rem; color: var(--navy-text); }
.mock-value.is-up { color: var(--navy-green); }
.mock-value.is-spark { color: var(--spark-bright); }
.mock-value.is-blue { color: var(--navy-blue); }
.mock-value.is-cyan { color: var(--navy-cyan); }
.mock-value.is-yellow { color: var(--navy-yellow); }

.mock-bars { display: grid; gap: 8px; }
.mock-bar { display: grid; grid-template-columns: 64px 1fr 72px; gap: 10px; align-items: center; }
.mock-bar .bar-track {
  height: 8px;
  background: var(--navy-panel);
  border-radius: 2px;
  overflow: hidden;
}
.mock-bar .bar-fill { display: block; height: 100%; border-radius: 2px; }
.bar-blue { background: var(--navy-blue); }
.bar-red { background: #fb7185; }
.bar-cyan { background: var(--navy-cyan); }
.bar-yellow { background: var(--navy-yellow); }
.bar-purple { background: #c084fc; }
.bar-green { background: var(--navy-green); }
.bar-spark { background: var(--spark-bright); }

.mock-foot {
  padding: 8px 14px;
  border-top: 1px solid var(--navy-line);
  font-size: 0.68rem;
  color: var(--navy-dim);
}

figcaption {
  font-size: 0.8rem;
  color: var(--ink-dim);
  margin-top: 10px;
}

/* ------------------------------------------------------------
   9. Hero da home
   ------------------------------------------------------------ */
.hero {
  padding: 88px 0 72px;
  background:
    radial-gradient(1100px 420px at 90% -10%, var(--spark-wash), transparent 70%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
}
.hero h1 { margin-bottom: 20px; }
.hero .lead { margin-bottom: 32px; max-width: 560px; }
.hero-note { margin-top: 18px; font-size: 0.85rem; color: var(--ink-dim); }

/* ------------------------------------------------------------
   10. Passos numerados
   ------------------------------------------------------------ */
.steps { counter-reset: passo; display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); }
@media (max-width: 880px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding: 28px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius-lg); }
.step::before {
  counter-increment: passo;
  content: counter(passo, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--spark);
  margin-bottom: 12px;
}
.step p { color: var(--ink-soft); font-size: 0.95rem; }

/* ------------------------------------------------------------
   11. Preços
   ------------------------------------------------------------ */
.tier {
  display: flex;
  flex-direction: column;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
}
.tier.tier-featured {
  border-color: var(--spark);
  box-shadow: var(--shadow);
}
.tier .tier-name {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--spark-deep);
  margin-bottom: 10px;
}
.tier .tier-price {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.tier .tier-price small {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-dim);
}
.tier .tier-for {
  font-size: 0.9rem;
  color: var(--ink-dim);
  margin: 6px 0 18px;
}
.tier ul {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  font-size: 0.93rem;
  color: var(--ink-soft);
}
.tier li {
  padding-left: 22px;
  position: relative;
  margin-bottom: 9px;
}
.tier li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 12px;
  height: 7px;
  border-left: 2px solid var(--ok);
  border-bottom: 2px solid var(--ok);
  transform: rotate(-45deg);
}
.tier .btn { margin-top: auto; text-align: center; }

/* ------------------------------------------------------------
   12. FAQ (details/summary — sem JS)
   ------------------------------------------------------------ */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  padding: 18px 4px;
  font-weight: 600;
  color: var(--ink);
  list-style: none;
  position: relative;
  padding-right: 36px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--spark);
}
.faq details[open] summary::after { content: "–"; }
.faq .faq-body { padding: 0 4px 20px; color: var(--ink-soft); font-size: 0.95rem; max-width: 760px; }

/* ------------------------------------------------------------
   13. Avisos / notas de honestidade
   ------------------------------------------------------------ */
.note {
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--spark);
  background: var(--paper-dim);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.note strong { color: var(--ink); }

/* ------------------------------------------------------------
   14. CTA final
   ------------------------------------------------------------ */
.cta-band {
  background: var(--navy);
  color: var(--navy-text);
  padding: 72px 0;
  text-align: center;
}
.cta-band h2 { color: #fff; margin-bottom: 12px; }
.cta-band p { max-width: 620px; margin: 0 auto 28px; color: var(--navy-text); }
.cta-band .btn-row { justify-content: center; }

/* ------------------------------------------------------------
   15. Rodapé
   ------------------------------------------------------------ */
.site-footer {
  background: var(--navy);
  color: var(--navy-dim);
  padding: 56px 0 32px;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 880px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .brand { color: #fff; margin-bottom: 12px; }
.footer-brand p { color: var(--navy-dim); max-width: 320px; font-size: 0.88rem; }

.site-footer h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 650;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--navy-text);
  margin-bottom: 14px;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 9px; }
.site-footer a { color: var(--navy-dim); }
.site-footer a:hover { color: var(--navy-text); text-decoration: none; }

.footer-bottom {
  border-top: 1px solid var(--navy-line);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  justify-content: space-between;
  font-size: 0.8rem;
}

/* ------------------------------------------------------------
   16. Utilidades
   ------------------------------------------------------------ */
.mt-0 { margin-top: 0; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.mt-56 { margin-top: 56px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }
.center { text-align: center; }
.muted { color: var(--ink-dim); }
.section-dark .muted { color: var(--navy-dim); }
.maxw-prose { max-width: 720px; }

@media print {
  .site-header, .site-footer, .cta-band, .nav-toggle { display: none !important; }
  body { color: #000; }
}