/* ============================================================
   Ergo IA — Dotnova · site institucional estático
   ============================================================ */

:root {
  --bg: #0b0f14;
  --surface: #141a21;
  --surface-2: #10161d;
  --border: #2e3945;
  --text: #e5eaf0;
  --muted: #8a94a6;
  --accent: #269794;
  --accent-bright: #2fd4c9;
  --radius: 12px;
  --maxw: 1080px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, Cantarell, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-bright);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 15, 20, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

.brand:hover {
  text-decoration: none;
}

.brand svg {
  display: block;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px 22px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--text);
  text-decoration: none;
}

/* ---------- Botões ---------- */

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1.2;
}

.btn-primary {
  background: var(--accent);
  color: #06211f;
}

.btn-primary:hover {
  background: var(--accent-bright);
  text-decoration: none;
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent);
  text-decoration: none;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 72px;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 55% at 50% -10%, rgba(38, 151, 148, 0.22), transparent 70%),
    var(--bg);
}

.hero .eyebrow {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-bright);
  background: var(--surface);
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(1.9rem, 5.5vw, 3.1rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.12;
  max-width: 780px;
  margin: 0 auto;
}

.hero h1 .accent {
  color: var(--accent-bright);
}

.hero .sub {
  color: var(--muted);
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  max-width: 640px;
  margin: 18px auto 0;
}

.hero .cta-row {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Seções ---------- */

.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--surface-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 40px;
}

.section-head h2 {
  font-size: clamp(1.4rem, 3.5vw, 1.9rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-head p {
  color: var(--muted);
  margin-top: 10px;
}

/* ---------- Como funciona ---------- */

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  list-style: none;
  counter-reset: step;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
}

.step .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: rgba(38, 151, 148, 0.15);
  border: 1px solid rgba(38, 151, 148, 0.45);
  color: var(--accent-bright);
  font-weight: 800;
  font-size: 0.95rem;
  margin-bottom: 14px;
}

.step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.step p {
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 8px;
}

/* ---------- Recursos ---------- */

.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
}

.card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(38, 151, 148, 0.14);
  color: var(--accent-bright);
  margin-bottom: 14px;
}

.card .icon svg {
  display: block;
}

.card h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* ---------- Sobre ---------- */

.about-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  max-width: 720px;
  margin: 0 auto;
}

.about-box h2 {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.about-box p {
  color: var(--muted);
  margin-top: 12px;
  font-size: 0.95rem;
}

.about-box dl {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.about-box dt {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-bright);
}

.about-box dd {
  color: var(--text);
  font-size: 0.95rem;
  margin-top: 2px;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 36px 0;
  background: var(--surface-2);
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.footer-links {
  display: flex;
  gap: 10px 24px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-legal {
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.7;
}

/* ---------- Páginas legais ---------- */

.legal-main {
  padding: 48px 0 80px;
}

.legal-article {
  max-width: 760px;
  margin: 0 auto;
}

.legal-article h1 {
  font-size: clamp(1.6rem, 4vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.02em;
}

.legal-article .version {
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--muted);
}

.legal-article h2 {
  margin-top: 40px;
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.legal-article h3 {
  margin-top: 20px;
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--text);
}

.legal-article p {
  margin-top: 12px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.legal-article ul {
  margin-top: 8px;
  padding-left: 20px;
  list-style: disc;
}

.legal-article li {
  margin-top: 8px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

.legal-article strong {
  color: var(--text);
  font-weight: 700;
}

/* ---------- Responsivo ---------- */

@media (min-width: 640px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .features {
    grid-template-columns: repeat(3, 1fr);
  }

  .site-footer .container {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .about-box dl {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Botão Entrar do header — versão compacta do btn-primary */
.btn-nav { padding: 8px 16px; font-size: 0.9rem; margin-left: 6px; }

.site-nav a.btn-nav { color: #ffffff; }
.site-nav a.btn-nav:hover { color: #ffffff; }