/* Decifrando IA | Aula gratuita de Claude Code
   Paleta e medidas conforme o briefing aprovado.
   Sem dependencias externas: usa Inter se estiver instalada, com alternativas do sistema. */

:root {
  --bg: #101A30;
  --bg-alt: #15223C;
  --card: #1C2C49;
  --border: #344660;
  --title: #F8FAFC;
  --body: #D5DDEA;
  --muted: #B5C2D8;
  --accent: #75D5EC;
  --btn: #F4D35E;
  --btn-ink: #172033;
  --btn-hover: #FFE180;

  --maxw: 1120px;
  --radius-card: 16px;
  --radius-btn: 12px;

  --font: Inter, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: var(--font);
  font-size: 1.0625rem;      /* 17px */
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }

h1, h2, h3 {
  color: var(--title);
  line-height: 1.15;
  margin: 0 0 0.6em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.125rem, 1.35rem + 3.3vw, 3.75rem);   /* 34px a 60px */
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.625rem, 1.1rem + 2.2vw, 2.5rem);     /* 26px a 40px */
  font-weight: 700;
}

h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

p { margin: 0 0 1rem; max-width: 62ch; }

a { color: var(--accent); }

strong { color: var(--title); }

.eyebrow {
  font-size: 0.8125rem;      /* 13px */
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.muted { color: var(--muted); }

.highlight { color: var(--accent); font-weight: 700; }

/* ---------- Estrutura ---------- */

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

section { padding-block: 80px; }

.section-alt { background: var(--bg-alt); }

.prose { max-width: 640px; }

.section-note {
  margin-top: 24px;
  font-size: 0.9375rem;
  color: var(--muted);
  max-width: 640px;
}

.section-cta { margin-top: 32px; margin-bottom: 0; }

/* ---------- Cabecalho ---------- */

.site-header { border-bottom: 1px solid var(--border); }

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 18px;
}

.brand {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.1;
  text-decoration: none;
}

.brand__name {
  font-weight: 800;
  letter-spacing: 0.12em;
  color: var(--title);
  font-size: 1.0625rem;
}

.brand__sub {
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--muted);
  font-size: 0.875rem;       /* 14px */
  margin-top: 4px;
}

/* ---------- Botoes ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 14px 26px;
  border: 0;
  border-radius: var(--radius-btn);
  font: inherit;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  background: var(--btn);
  color: var(--btn-ink);
  transition: background-color 0.15s ease;
}

.btn:hover { background: var(--btn-hover); }

.btn--block { width: 100%; }

.btn--compact {
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.9375rem;
}

.btn--outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
  font-weight: 600;
}

.btn--outline:hover { background: rgba(117, 213, 236, 0.08); }

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ---------- Primeira tela ---------- */

.hero { position: relative; overflow: hidden; }

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(117, 213, 236, 0.10), transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 78%);
  pointer-events: none;
}

.hero .container { position: relative; }

.hero__inner {
  max-width: 760px;
  margin-inline: auto;
  text-align: center;
  padding-block: 40px;
}

.hero h1 { margin-bottom: 0.5em; }

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

.hero__support {
  font-size: 1.125rem;
  margin-inline: auto;
  margin-bottom: 1rem;
}

.hero__meta {
  font-weight: 600;
  color: var(--muted);
  margin: 1.75rem auto;
}

.hero__note {
  font-size: 0.9375rem;
  color: var(--muted);
  margin: 1rem auto 0;
}

/* ---------- Conteudo da aula ---------- */

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

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
}

.card__num {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}

.card h3 { margin-bottom: 0.5em; }

.card p { color: var(--muted); margin-bottom: 0; }

/* ---------- Publico ---------- */

.audience {
  display: grid;
  gap: 28px 40px;
  grid-template-columns: 1fr;
}

.audience__item {
  border-top: 2px solid var(--border);
  padding-top: 16px;
}

.audience__item h3 { margin-bottom: 0.35em; }

.audience__item p {
  color: var(--muted);
  margin-bottom: 0;
  max-width: 46ch;
}

/* ---------- Sobre a Barbara ---------- */

.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas: "photo" "text";
  gap: 36px;
}

.about__text { grid-area: text; }
.about__text p { color: var(--body); }

.about__photo {
  grid-area: photo;
  max-width: 320px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--card);
  aspect-ratio: 4 / 5;
}

.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 18%;
}

/* ---------- Perguntas frequentes ---------- */

.faq__list { max-width: 760px; }

.faq details { border-bottom: 1px solid var(--border); }
.faq details:first-child { border-top: 1px solid var(--border); }

.faq summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  padding: 20px 44px 20px 0;
  min-height: 44px;
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--title);
}

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

.faq summary::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 26px;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
}

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

.faq__answer { padding: 0 0 22px; }
.faq__answer p { margin-bottom: 0; max-width: 64ch; }

/* ---------- Inscricao ---------- */

/* Fundo principal aqui de proposito: separa o painel da secao de perguntas (tambem alternada) logo acima. */
.signup { background: var(--bg); }

.signup__panel {
  max-width: 640px;
  margin-inline: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 44px 32px;
  text-align: center;
}

.signup__panel p { margin-inline: auto; }

.signup__meta {
  font-weight: 600;
  color: var(--muted);
  margin: 1.25rem auto;
}

.form-slot {
  max-width: 560px;
  margin: 28px auto 0;
  text-align: left;
}

.form-notice {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin: 0 0 22px;
  font-size: 0.9375rem;
  color: var(--muted);
}

.form-slot iframe {
  width: 100%;
  border: 0;
  display: block;
  min-height: 260px;
}

.form-fallback {
  margin: 14px 0 0;
  font-size: 0.875rem;
  color: var(--muted);
}

.field { margin-bottom: 18px; }

.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--body);
}

.field input {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--title);
  font: inherit;
}

.field input::placeholder { color: var(--muted); }

.field input:disabled { opacity: 0.7; cursor: not-allowed; }

.signup__fineprint {
  margin: 18px auto 0;
  font-size: 0.875rem;
  color: var(--muted);
}

/* ---------- Consultoria ---------- */

.consult { border-top: 1px solid var(--border); }

.consult__box { max-width: 720px; }

.consult h2 { font-size: clamp(1.375rem, 1.1rem + 1.2vw, 1.75rem); }

/* ---------- Rodape ---------- */

.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-block: 48px;
}

.site-footer .brand__name { display: inline-block; font-size: 1rem; }

.site-footer p { color: var(--muted); margin: 12px 0 16px; max-width: 52ch; }

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.site-footer a:hover { color: var(--accent); }

/* ---------- Acessibilidade ---------- */

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 20;
  background: var(--btn);
  color: var(--btn-ink);
  font-weight: 700;
  padding: 10px 16px;
  border-radius: 8px;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus { top: 12px; }

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

:target { scroll-margin-top: 24px; }

/* ---------- Telas medias ---------- */

@media (min-width: 760px) {
  .cards { grid-template-columns: 1fr 1fr; }
  .audience { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 820px) {
  .about__grid {
    grid-template-columns: 1fr 340px;
    grid-template-areas: "text photo";
    gap: 56px;
    align-items: start;
  }
  .about__photo { max-width: none; }
}

@media (min-width: 900px) {
  .hero__inner { padding-block: 48px; }
}

/* ---------- Celular ---------- */

@media (max-width: 600px) {
  .container { padding-inline: 20px; }
  section { padding-block: 52px; }
  .signup__panel { padding: 32px 22px; }
  .card { padding: 24px; }
}

@media (max-width: 520px) {
  .site-header .btn { display: none; }
}

/* ---------- Preferencia por menos movimento ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
}