/* ============================================================
   Agent Flow — landing page
   Reaproveita os tokens de site.css. Nada de cor ou fonte novos:
   a pagina precisa parecer a mesma marca.
   ============================================================ */

/* ---------------- Hero ---------------- */
.af-hero {
  background: var(--blue);
  color: var(--white);
  padding: 160px var(--pad-x) 110px;
  position: relative; overflow: hidden;
}
.af-hero-inner {
  max-width: var(--maxw); margin-inline: auto;
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 72px; align-items: center;
}
.af-hero h1 {
  font-size: clamp(40px, 5.4vw, 74px); font-weight: 700;
  letter-spacing: -0.035em; line-height: 1.02;
  margin: 24px 0 0; text-wrap: balance;
}
.af-hero h1 .alt { color: var(--glow); }
.af-hero .lead {
  font-size: clamp(17px, 1.35vw, 20px); line-height: 1.6;
  opacity: 0.85; margin: 28px 0 0; max-width: 54ch;
}
.af-cta { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; margin-top: 44px; }
.af-nota {
  font-family: var(--ff-mono); font-size: 12px; letter-spacing: 0.1em;
  text-transform: uppercase; opacity: 0.55; margin: 22px 0 0;
}

/* Diagrama de fluxo do hero: o produto e um construtor de grafos,
   entao o visual mostra um grafo de verdade. */
.af-grafo {
  background: rgba(5, 8, 28, 0.55);
  border: 1px solid var(--line);
  border-radius: 16px; padding: 28px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}
.af-grafo svg { width: 100%; height: auto; display: block; }
.af-grafo .no { fill: rgba(255, 255, 255, 0.06); stroke: var(--glow); stroke-width: 1.5; }
.af-grafo .no-destaque { fill: var(--bright); stroke: var(--bright); }
.af-grafo .aresta { stroke: var(--glow); stroke-width: 1.5; fill: none; opacity: 0.55; }
.af-grafo .rotulo {
  fill: var(--white); font-family: var(--ff-mono); font-size: 9px;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.af-grafo .rotulo-fraco { fill: var(--glow); opacity: 0.8; }

@media (prefers-reduced-motion: no-preference) {
  .af-grafo .pulso { animation: af-pulso 3s var(--easing) infinite; transform-origin: center; }
  .af-grafo .pulso-2 { animation-delay: .6s; }
  .af-grafo .pulso-3 { animation-delay: 1.2s; }
}
@keyframes af-pulso {
  0%, 100% { opacity: 0.35; }
  50%      { opacity: 1; }
}

/* ---------------- Seções ---------------- */
.af-sec { padding: var(--pad-y) var(--pad-x); }
.af-sec--paper { background: var(--paper); color: var(--ink); }
.af-sec--deep   { background: var(--deep); color: var(--white); }
.af-sec-inner { max-width: var(--maxw); margin-inline: auto; }

.af-sec h2 {
  font-size: clamp(32px, 4.2vw, 56px); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.05;
  margin: 20px 0 0; text-wrap: balance;
}
.af-sec .sub {
  font-size: clamp(16px, 1.3vw, 19px); line-height: 1.6;
  margin: 20px 0 0; max-width: 62ch;
}
.af-sec--paper .sub { color: var(--mute); }
.af-sec--deep .sub { opacity: 0.75; }
.af-sec-head { margin-bottom: 64px; }

/* ---------------- Como funciona ---------------- */
.af-passos {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark); border-radius: 16px; overflow: hidden;
}
.af-passo { background: var(--white); padding: 34px 26px; }
.af-passo .n {
  font-family: var(--ff-mono); font-size: 12px; letter-spacing: 0.2em;
  color: var(--bright); display: block; margin-bottom: 24px;
}
.af-passo h3 { font-size: 19px; font-weight: 700; letter-spacing: -0.015em; margin: 0 0 10px; }
.af-passo p { font-size: 14.5px; line-height: 1.6; color: var(--mute); margin: 0; }

/* ---------------- Recursos ---------------- */
.af-recursos {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.af-recurso {
  border: 1px solid var(--line); border-radius: 14px;
  padding: 28px 26px; background: rgba(255, 255, 255, 0.03);
  transition: border-color .3s var(--easing), background .3s var(--easing);
}
.af-recurso:hover { border-color: var(--glow); background: rgba(255, 255, 255, 0.06); }

/* Card orfao na ultima linha.
   Se o ultimo card inicia uma linha (posicao 3n+1), ele esta sozinho —
   entao vai para a coluna do meio em vez de ficar encostado a esquerda.
   A regra vale para 7, 10, 13... cards: nao depende da contagem atual.
   So no layout de 3 colunas; abaixo de 1100px a grade muda. */
@media (min-width: 1101px) {
  .af-recursos > .af-recurso:last-child:nth-child(3n + 1) { grid-column: 2; }
}
.af-recurso h3 {
  font-size: 17px; font-weight: 600; letter-spacing: -0.01em;
  margin: 0 0 10px; display: flex; align-items: center; gap: 12px;
}
.af-recurso h3::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--glow); flex-shrink: 0;
}
.af-recurso p { font-size: 14.5px; line-height: 1.6; opacity: 0.72; margin: 0; }

/* ---------------- Casos de uso ---------------- */
.af-casos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.af-caso {
  background: var(--white); border: 1px solid var(--line-dark);
  border-radius: 16px; padding: 32px 28px;
}
.af-caso .tag {
  font-family: var(--ff-mono); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--bright);
}
.af-caso h3 { font-size: 20px; font-weight: 700; letter-spacing: -0.015em; margin: 16px 0 10px; }
.af-caso p { font-size: 14.5px; line-height: 1.6; color: var(--mute); margin: 0; }

/* ---------------- Faixa de prova ---------------- */
.af-prova {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 56px 0; margin-top: 72px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px;
}
.af-prova div { text-align: center; }
.af-prova .k {
  font-size: clamp(28px, 3vw, 40px); font-weight: 700;
  letter-spacing: -0.03em; color: var(--glow); display: block;
}
.af-prova .d {
  font-family: var(--ff-mono); font-size: 12px; letter-spacing: 0.12em;
  text-transform: uppercase; opacity: 0.6; margin-top: 10px; display: block;
}

/* ---------------- CTA final ---------------- */
.af-final {
  background: var(--bright); color: var(--white);
  padding: var(--pad-y) var(--pad-x); text-align: center;
}
.af-final h2 {
  font-size: clamp(34px, 4.6vw, 62px); font-weight: 700;
  letter-spacing: -0.03em; line-height: 1.05; margin: 0 auto;
  max-width: 18ch; text-wrap: balance;
}
.af-final p {
  font-size: clamp(16px, 1.3vw, 19px); line-height: 1.6;
  opacity: 0.9; margin: 24px auto 40px; max-width: 56ch;
}

/* ---------------- Responsivo ---------------- */
@media (max-width: 1100px) {
  .af-hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .af-passos { grid-template-columns: repeat(2, 1fr); }
  .af-recursos, .af-casos { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .af-hero { padding-top: 130px; }
  .af-passos, .af-recursos, .af-casos { grid-template-columns: 1fr; }
  .af-prova { grid-template-columns: 1fr; gap: 32px; }
  .af-cta { gap: 14px; }
}