/* ============================================================================
   GUITARRA ROCK ACADEMY — FOLHA DE ESTILOS
   ============================================================================
   Este arquivo controla TODA a aparência do site: cores, fontes, espaçamentos.
   As cores e fontes principais ficam nas variáveis logo abaixo (":root"),
   então para mudar uma cor em todo o site, basta mudar em um único lugar.
   ============================================================================ */

/* ---------- IMPORTAÇÃO DE FONTES ---------- */
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@400;500;600;700&family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---------- SISTEMA DE DESIGN (TOKENS) ----------
   Tema: "estúdio de ensaio à noite" — grafite quente, glow de válvula
   de amplificador em âmbar, e um toque de vinho para urgência/CTA. */
:root {
  /* Cores de fundo */
  --bg-primary: #16130f;
  --bg-secondary: #1d1810;
  --bg-elevated: #251f16;
  --bg-panel: #2a2216;

  /* Acentos */
  --accent-amber: #e8871e;
  --accent-amber-soft: #f2a94d;
  --accent-amber-dim: rgba(232, 135, 30, 0.14);
  --accent-wine: #9c2f3f;
  --accent-wine-soft: #c14757;

  /* Texto */
  --text-primary: #f3ede2;
  --text-secondary: #beb2a0;
  --text-muted: #8c8071;

  /* Bordas e linhas */
  --border-subtle: rgba(243, 237, 226, 0.09);
  --border-strong: rgba(232, 135, 30, 0.4);
  --string-line: rgba(243, 237, 226, 0.14);

  /* Tipografia */
  --font-display: 'Oswald', 'Arial Narrow', sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Espaçamento em escala */
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 48px;
  --space-xl: 80px;
  --space-2xl: 120px;

  /* Bordas arredondadas */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --max-width: 1180px;
}

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

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* Foco visível para navegação por teclado */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent-amber-soft);
  outline-offset: 3px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* ---------- LINHA DE "CORDAS" — elemento de assinatura ----------
   Seis linhas horizontais finas, como as cordas de uma guitarra vistas
   de cima, usadas como divisor estrutural real entre seções (não decoração:
   remete literalmente ao instrumento e à forma como a tablatura é lida). */
.strings-divider {
  width: 100%;
  height: 46px;
  background-image: repeating-linear-gradient(
    var(--string-line), var(--string-line) 1px, transparent 1px, transparent 8px
  );
  opacity: 0.6;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-amber-soft);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-sm);
}
.eyebrow::before {
  content: '';
  width: 18px;
  height: 1px;
  background: var(--accent-amber);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  line-height: 1.12;
  color: var(--text-primary);
}

h2 {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
}

p { color: var(--text-secondary); }

.section-intro {
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  text-align: center;
}
.section-intro p { font-size: 1.08rem; }

section { padding: var(--space-xl) 0; position: relative; }

/* ---------- BOTÕES / CTA ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 17px 34px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(180deg, var(--accent-amber-soft), var(--accent-amber));
  color: #1a1409;
  box-shadow: 0 8px 24px -8px rgba(232, 135, 30, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -8px rgba(232, 135, 30, 0.7); }

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--border-strong);
  color: var(--text-primary);
}
.btn-secondary:hover { background: var(--accent-amber-dim); }

.btn-block { width: 100%; }

.cta-sub {
  display: block;
  margin-top: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ---------- HEADER ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(22, 19, 15, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}
.header-logo img { height: 34px; width: auto; }

/* ---------- PLACEHOLDER DE IMAGEM ----------
   Quando uma imagem oficial ainda não foi colocada, este bloco aparece
   automaticamente no lugar dela, avisando com clareza o que precisa
   ser inserido. Ver js/main.js para o funcionamento. */
.img-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
  background: repeating-linear-gradient(
    135deg, var(--bg-elevated), var(--bg-elevated) 10px, var(--bg-panel) 10px, var(--bg-panel) 20px
  );
  border: 1.5px dashed var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--accent-amber-soft);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: var(--space-md);
  min-height: 160px;
  width: 100%;
}
.img-placeholder strong {
  font-family: var(--font-body);
  color: var(--text-primary);
  font-size: 0.95rem;
}

.header-logo .img-placeholder { min-height: 34px; width: 160px; padding: 4px 10px; font-size: 0.6rem; }

/* ---------- PLACEHOLDER DE VÍDEO ---------- */
.video-placeholder {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: var(--radius-lg);
  border: 1.5px dashed var(--border-strong);
  background: linear-gradient(160deg, var(--bg-elevated), var(--bg-panel));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  text-align: center;
  padding: var(--space-md);
  overflow: hidden;
}
.video-placeholder .play-icon {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  background: var(--accent-amber-dim);
  border: 1.5px solid var(--accent-amber);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-xs);
}
.video-placeholder .play-icon svg { fill: var(--accent-amber-soft); }
.video-placeholder strong {
  font-family: var(--font-body);
  color: var(--text-primary);
  font-size: 1rem;
}
.video-placeholder span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  max-width: 340px;
}
.video-embed { width: 100%; aspect-ratio: 16/9; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border-subtle); }
.video-embed iframe, .video-embed video { width: 100%; height: 100%; border: 0; }

/* ---------- HERO ---------- */
.hero {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-xl);
  background:
    radial-gradient(ellipse 900px 500px at 50% -10%, var(--accent-amber-dim), transparent 60%),
    var(--bg-primary);
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.3rem, 4.6vw, 3.6rem);
  margin-bottom: var(--space-md);
}
.hero h1 em {
  font-style: normal;
  color: var(--accent-amber-soft);
}
.hero p.lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-lg);
}
.hero-cta-group { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-md); }
.hero-trust {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  flex-wrap: wrap;
}
.hero-trust .stat { font-family: var(--font-mono); }
.hero-trust .stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent-amber-soft);
}
.hero-trust .stat span { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }

/* ---------- DIAGNÓSTICO ("PARA QUEM É") ---------- */
.diagnostico { background: var(--bg-secondary); }
.diagnostico-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
}
.diag-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.diag-item:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.diag-item .mark {
  font-family: var(--font-mono);
  color: var(--accent-amber);
  font-size: 1.1rem;
  flex-shrink: 0;
}
.diag-item p { color: var(--text-primary); font-size: 0.98rem; }

.diagnostico-footer { text-align: center; margin-top: var(--space-lg); }

/* ---------- PROVA / RESULTADOS ---------- */
.resultados-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}
.resultados-grid .img-placeholder { aspect-ratio: 1 / 1; }

/* ---------- MÉTODO / CICLO ---------- */
.metodo { background: var(--bg-secondary); }
.metodo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2xl); align-items: center; }
.ciclo-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-sm); margin-top: var(--space-xl); }
.ciclo-step {
  padding: var(--space-md) var(--space-sm);
  border-top: 2px solid var(--accent-amber);
  background: var(--bg-elevated);
}
.ciclo-step .num {
  font-family: var(--font-mono);
  color: var(--accent-amber-soft);
  font-size: 0.85rem;
  margin-bottom: var(--space-xs);
  display: block;
}
.ciclo-step h4 { font-family: var(--font-display); font-size: 1.05rem; margin-bottom: 6px; }
.ciclo-step p { font-size: 0.9rem; }

/* ---------- MÓDULOS ---------- */
.modulos-list { margin-top: var(--space-lg); border-top: 1px solid var(--border-subtle); }
.modulo-row {
  display: grid;
  grid-template-columns: 90px 1fr 1.3fr;
  gap: var(--space-lg);
  align-items: center;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--border-subtle);
}
.modulo-row .modulo-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  color: var(--accent-amber);
  opacity: 0.85;
}
.modulo-row .img-placeholder { aspect-ratio: 1/1; }
.modulo-row h3 { margin-bottom: var(--space-xs); }
.modulo-row p { font-size: 0.96rem; }

/* ---------- BÔNUS ---------- */
.bonus { background: var(--bg-secondary); }
.bonus-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md); margin-top: var(--space-lg); }
.bonus-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.bonus-card .img-placeholder { aspect-ratio: 16/10; margin-bottom: var(--space-sm); }
.bonus-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg-primary);
  background: var(--accent-amber-soft);
  padding: 4px 10px;
  border-radius: 20px;
  margin-bottom: var(--space-sm);
}
.bonus-card h3 { margin-bottom: var(--space-xs); }
.bonus-card p { font-size: 0.95rem; }

/* ---------- TRANSFORMAÇÃO / BENEFÍCIOS ---------- */
.beneficios-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); margin-top: var(--space-lg); }
.beneficio-item { display: flex; gap: var(--space-sm); align-items: flex-start; }
.beneficio-item svg { flex-shrink: 0; margin-top: 3px; }
.beneficio-item p { color: var(--text-primary); font-size: 1rem; }

/* ---------- OFERTA / PREÇO ---------- */
.oferta {
  background: linear-gradient(180deg, var(--bg-secondary), var(--bg-primary));
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.oferta-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
}
.stack-list { text-align: left; margin: var(--space-lg) 0; }
.stack-item {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.92rem;
}
.stack-item span:first-child { color: var(--text-primary); font-family: var(--font-body); }
.stack-item span:last-child { color: var(--text-secondary); }
.stack-total {
  display: flex;
  justify-content: space-between;
  padding-top: var(--space-sm);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.stack-total span:last-child { color: var(--text-muted); text-decoration: line-through; }

.preco-final { margin: var(--space-lg) 0; }
.preco-final .label { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.preco-final .valor {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 4.2rem);
  color: var(--accent-amber-soft);
  line-height: 1;
  margin: 8px 0;
}
.preco-final .valor sup { font-size: 1.6rem; vertical-align: super; }
.preco-final .parcelas { font-size: 0.9rem; color: var(--text-muted); }

.oferta-selos { display: flex; justify-content: center; gap: var(--space-lg); margin-top: var(--space-lg); flex-wrap: wrap; }
.selo { display: flex; flex-direction: column; align-items: center; gap: 6px; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.selo svg { color: var(--accent-amber-soft); }

.oferta-aviso { text-align: center; margin-top: var(--space-lg); font-size: 0.88rem; color: var(--text-muted); font-style: italic; }

/* ---------- PROFESSOR ---------- */
.professor-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: var(--space-2xl); align-items: center; }
.professor-grid .img-placeholder { aspect-ratio: 4/5; }
.professor-credenciais { display: flex; flex-wrap: wrap; gap: 10px; margin-top: var(--space-md); }
.credencial-chip {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 6px 14px;
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  color: var(--text-secondary);
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 760px; margin: var(--space-lg) auto 0; }
.faq-item { border-bottom: 1px solid var(--border-subtle); }
.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  text-align: left;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.02rem;
}
.faq-question .icon { font-family: var(--font-mono); color: var(--accent-amber-soft); transition: transform 0.2s ease; flex-shrink: 0; }
.faq-item.open .faq-question .icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; padding-bottom: var(--space-md); }
.faq-answer p { font-size: 0.96rem; }

/* ---------- CTA FINAL ---------- */
.cta-final { text-align: center; }
.cta-final h2 { max-width: 620px; margin-left: auto; margin-right: auto; }

/* ---------- RODAPÉ ---------- */
.site-footer { background: var(--bg-secondary); padding: var(--space-xl) 0 var(--space-md); border-top: 1px solid var(--border-subtle); }
.footer-top { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-md); margin-bottom: var(--space-lg); }
.footer-logo img { height: 30px; }
.footer-contato { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-secondary); }
.footer-contato a { color: var(--accent-amber-soft); }
.footer-legal { font-size: 0.78rem; color: var(--text-muted); line-height: 1.7; border-top: 1px solid var(--border-subtle); padding-top: var(--space-md); }
.footer-legal a { color: var(--text-secondary); text-decoration: underline; }
.footer-legal p + p { margin-top: var(--space-sm); }

/* ---------- REVEAL AO ROLAR (sutil) ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ============================================================================
   RESPONSIVO
   ============================================================================ */
@media (max-width: 900px) {
  .hero-grid, .metodo-grid, .professor-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: var(--space-lg); }
  .diagnostico-grid, .bonus-grid, .beneficios-list { grid-template-columns: 1fr; }
  .ciclo-steps { grid-template-columns: repeat(2, 1fr); }
  .resultados-grid { grid-template-columns: repeat(2, 1fr); }
  .modulo-row { grid-template-columns: 60px 90px 1fr; }
  .modulo-row .modulo-num { font-size: 1.1rem; }
}

@media (max-width: 560px) {
  section { padding: var(--space-lg) 0; }
  .hero { padding-top: var(--space-lg); }
  .modulo-row { grid-template-columns: 1fr; text-align: left; }
  .modulo-row .img-placeholder { aspect-ratio: 16/9; }
  .oferta-selos { gap: var(--space-md); }
  .professor-credenciais { justify-content: center; }
}