/* ============================================================
   BOOKATOON — Componentes
   Etapa 3 da migração de @layer (docs/layer-proposal.md).
   ============================================================ */
@layer components {

/* ---------------- Botões ---------------- */

.btn {
  --btn-bg: var(--ambar);
  --btn-fg: var(--ink);
  --btn-shadow: var(--roxo-profundo);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: var(--tap-min);
  padding: 0.85rem 1.75rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: var(--stroke) solid var(--ink);
  border-radius: var(--r-pill);
  box-shadow: 0.3rem 0.35rem 0 var(--btn-shadow);
  cursor: var(--cursor-hand);
  transition:
    transform var(--dur-micro) var(--ease-energy),
    box-shadow var(--dur-micro) var(--ease-energy),
    background-color var(--dur-fast) linear;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0.42rem 0.55rem 0 var(--btn-shadow);
}

.btn:active {
  transform: translateY(2px);
  box-shadow: 0.1rem 0.12rem 0 var(--btn-shadow);
}

.btn--primary {
  --btn-bg: var(--ambar);
}

.btn--secondary {
  --btn-bg: var(--branco);
}

.btn--coral {
  --btn-bg: var(--coral);
  --btn-fg: var(--on-coral); /* Piloto Fase 4B: valor idêntico, literal tirado do componente */
  --btn-shadow: var(--ink);
}

.btn--ink {
  --btn-bg: var(--ink);
  --btn-fg: var(--branco);
  --btn-shadow: var(--coral);
}

.btn--sobre-escuro {
  --btn-shadow: var(--ambar);
}

.btn .btn__icon {
  width: 1.2em;
  height: 1.2em;
  flex: none;
}

/* Botão de ícone */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--tap-min);
  height: var(--tap-min);
  padding: 0;
  background: var(--branco);
  border: var(--stroke) solid var(--ink);
  border-radius: var(--r-pill);
  box-shadow: 0.22rem 0.26rem 0 rgba(36, 21, 51, 0.22);
  cursor: var(--cursor-hand);
  transition:
    transform var(--dur-micro) var(--ease-energy),
    box-shadow var(--dur-micro) var(--ease-energy);
}

.icon-btn:hover {
  transform: translateY(-2px);
}

.icon-btn:active {
  transform: translateY(1px) scale(0.97);
  box-shadow: 0.08rem 0.1rem 0 rgba(36, 21, 51, 0.22);
}

/* ---------------- Chips / etiquetas ---------------- */

/* Contrato semântico (Fase 4B/continuação): --surface-card/--on-card/
   --border-on-page — "color" era só herança do body (mesmo valor), agora
   explícito como os demais componentes hardened na Fase 2. */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--on-card);
  background: var(--surface-card);
  border: var(--stroke) solid var(--border-on-page);
  border-radius: var(--r-pill);
  box-shadow: 0.18rem 0.22rem 0 rgba(var(--ink-rgb), 0.15);
}

.chip--dado {
  background: var(--ambar-suave);
  font-size: 0.85rem;
}

/* ---------------- Primitivos de layout ----------------
   Utilitários opt-in — não aplicados a nenhum componente existente
   automaticamente. Contrato via custom property, mesmo padrão de .btn
   (--btn-bg/--btn-fg): defina --stack-space/--cluster-space/--cluster-align/
   --cluster-justify por instância quando o padrão não servir. */

/* Ritmo vertical: espaço só ENTRE filhos, nunca antes do primeiro nem
   depois do último — evita duplo espaçamento ao aninhar/compor blocos. */
.stack > * + * {
  margin-top: var(--stack-space, var(--sp-5));
}

/* Agrupamento horizontal que quebra de forma previsível (chips, tags,
   ações secundárias) — mesmo espaçamento em qualquer direção de quebra. */
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: var(--cluster-align, center);
  justify-content: var(--cluster-justify, flex-start);
  gap: var(--cluster-space, var(--sp-4));
}

/* ---------------- Links com sublinhado desenhado ---------------- */

.link-desenhado {
  position: relative;
  font-weight: 700;
  text-decoration: none;
  background-image: linear-gradient(120deg, currentColor 0%, currentColor 100%);
  background-repeat: no-repeat;
  background-size: 100% 3px;
  background-position: 0 92%;
  padding-bottom: 2px;
  transition: background-size var(--dur-micro) var(--ease-energy);
}

.link-desenhado:hover {
  background-size: 100% 42%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  padding: 0.9rem 0;
  transition:
    padding var(--dur-micro) var(--ease-suave),
    background-color var(--dur-micro) linear;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 1rem;
  border-radius: var(--r-pill);
  border: var(--stroke) solid transparent;
  transition:
    background-color var(--dur-micro) linear,
    border-color var(--dur-micro) linear,
    box-shadow var(--dur-micro) linear;
}

.site-header.is-scrolled .site-header__inner {
  background: var(--branco);
  border-color: var(--ink);
  box-shadow: 0.28rem 0.32rem 0 rgba(36, 21, 51, 0.16);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: var(--tap-min);
  text-decoration: none;
}

.brand__logo {
  height: 48px;
  width: auto;
  flex: none;
}

.brand__logo--footer {
  height: 56px;
}

.motion-on .brand:hover .brand__logo {
  animation: brand-bounce 0.5s var(--ease-energy);
}

@keyframes brand-bounce {
  0% { transform: none; }
  40% { transform: translateY(-4px) rotate(-6deg); }
  100% { transform: none; }
}

.nav-desktop ul {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}

.nav-desktop a {
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  min-height: var(--tap-min);
  padding: 0.4rem 0.9rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.02rem;
  text-decoration: none;
  color: var(--ink);
  border-radius: var(--r-pill);
  transition: background-color var(--dur-fast) linear, color var(--dur-fast) linear;
}

.nav-desktop a:hover {
  background: var(--ambar-suave);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.header-cta {
  font-size: 1rem;
  padding: 0.6rem 1.3rem;
  box-shadow: 0.22rem 0.26rem 0 var(--roxo-profundo);
}

/* Menu mobile */
.menu-toggle {
  display: none;
}

.nav-mobile {
  display: none;
}

@media (max-width: 56rem) {
  .nav-desktop,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-mobile {
    display: block;
    position: fixed;
    inset: 0;
    z-index: var(--z-menu);
    background: var(--roxo-profundo);
    color: var(--papel-sobre-escuro);
    padding: 5.5rem 1.5rem 2rem;
    overflow-y: auto;
    visibility: hidden;
    opacity: 0;
    transition: opacity var(--dur-micro) var(--ease-suave), visibility 0s linear var(--dur-micro);
  }

  .nav-mobile.is-open {
    visibility: visible;
    opacity: 1;
    transition-delay: 0s;
  }

  .nav-mobile ul {
    display: grid;
    gap: 0.5rem;
  }

  .nav-mobile a {
    display: flex;
    align-items: center;
    min-height: var(--tap-min);
    padding: 0.9rem 1.2rem;
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--papel-sobre-escuro);
    text-decoration: none;
    border-radius: var(--r-lg);
    border: var(--stroke) solid transparent;
    transition: border-color var(--dur-fast) linear, background-color var(--dur-fast) linear;
  }

  .nav-mobile a:hover,
  .nav-mobile a:focus-visible {
    background: var(--roxo-ink);
    border-color: var(--ambar);
  }

  .motion-on .nav-mobile.is-open li {
    animation: menu-item-in 0.45s var(--ease-energy) backwards;
  }

  .motion-on .nav-mobile.is-open li:nth-child(1) { animation-delay: 40ms; }
  .motion-on .nav-mobile.is-open li:nth-child(2) { animation-delay: 90ms; }
  .motion-on .nav-mobile.is-open li:nth-child(3) { animation-delay: 140ms; }
  .motion-on .nav-mobile.is-open li:nth-child(4) { animation-delay: 190ms; }
  .motion-on .nav-mobile.is-open li:nth-child(5) { animation-delay: 240ms; }
  .motion-on .nav-mobile.is-open li:nth-child(6) { animation-delay: 290ms; }

  @keyframes menu-item-in {
    from {
      opacity: 0;
      transform: translateY(14px);
    }
    to {
      opacity: 1;
      transform: none;
    }
  }

  .nav-mobile .nav-mobile__cta {
    margin-top: 1.5rem;
  }

  body.menu-open {
    overflow: hidden;
  }

  /* Com o menu aberto, a barra do header fica acima do overlay
     (o overlay é filho do header) para manter marca e botão de
     fechar visíveis e alcançáveis */
  .site-header > .container {
    position: relative;
    z-index: calc(var(--z-menu) + 1);
  }

  body.menu-open .site-header__inner {
    background: var(--branco);
    border-color: var(--ink);
    box-shadow: 0.28rem 0.32rem 0 rgba(36, 21, 51, 0.35);
  }
}

/* Ícone do menu: hambúrguer ↔ X */
.menu-icon--fechar {
  display: none;
}

.menu-toggle[aria-expanded="true"] .menu-icon--abrir {
  display: none;
}

.menu-toggle[aria-expanded="true"] .menu-icon--fechar {
  display: block;
}

/* ---------------- Painel de conforto ---------------- */

/* Painel de conforto vive no canto inferior ESQUERDO;
   o canto direito pertence ao disco de vinil (--z-player). */
.comfort-launcher {
  position: fixed;
  left: calc(1rem + env(safe-area-inset-left, 0px));
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  z-index: var(--z-panel);
  background: var(--ambar);
}

.comfort-panel {
  position: fixed;
  left: calc(1rem + env(safe-area-inset-left, 0px));
  bottom: calc(4.6rem + env(safe-area-inset-bottom, 0px));
  z-index: var(--z-panel);
  width: min(21rem, calc(100vw - 2rem));
  background: var(--branco);
  border: var(--stroke) solid var(--ink);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sticker);
  padding: var(--sp-5);
  visibility: hidden;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity var(--dur-micro) var(--ease-suave),
    transform var(--dur-micro) var(--ease-energy),
    visibility 0s linear var(--dur-micro);
}

.comfort-panel.is-open {
  visibility: visible;
  opacity: 1;
  transform: none;
  transition-delay: 0s;
}

.comfort-panel h2 {
  font-size: 1.3rem;
  margin-bottom: 0.35rem;
}

.comfort-panel > p {
  font-size: var(--fs-small);
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.comfort-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  min-height: var(--tap-min);
  padding: 0.35rem 0;
}

.comfort-option span {
  font-weight: 700;
  font-size: var(--fs-small);
}

/* Toggle acessível */
.switch {
  position: relative;
  flex: none;
  width: 58px;
  height: 32px;
  padding: 0;
  background: var(--creme);
  border: var(--stroke) solid var(--ink);
  border-radius: var(--r-pill);
  cursor: var(--cursor-hand);
  transition: background-color var(--dur-micro) linear;
}

.switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: var(--branco);
  border: 2px solid var(--ink);
  border-radius: 50%;
  transition: transform var(--dur-micro) var(--ease-energy), background-color var(--dur-micro) linear;
}

.switch[aria-checked="true"] {
  background: var(--lima);
}

.switch[aria-checked="true"]::after {
  transform: translateX(24px);
  background: var(--branco);
}

.switch[aria-checked="true"]::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 50%;
  width: 8px;
  height: 5px;
  border-left: 2.5px solid var(--ink);
  border-bottom: 2.5px solid var(--ink);
  transform: translateY(-70%) rotate(-45deg);
}

/* ---------------- Título de seção ---------------- */

.section-head {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head .chip {
  justify-self: start;
}

.section-title {
  font-size: var(--fs-section);
}

.section-lead {
  font-size: var(--fs-lead);
  color: var(--text-muted);
  max-width: 56ch;
}

.marca-texto {
  position: relative;
  display: inline-block;
  isolation: isolate;
  padding-inline: 0.1em;
}

.marca-texto::before {
  content: "";
  position: absolute;
  inset: 58% -0.15em 4%;
  background: var(--marca-cor, var(--ambar));
  border-radius: 6px;
  z-index: -1;
  transform: rotate(-1deg);
}

/* ---------------- Equalizador (assinatura visual) ---------------- */

.equalizer {
  display: inline-flex;
  align-items: flex-end;
  gap: 4px;
  height: 30px;
}

.equalizer i {
  width: 6px;
  border-radius: 4px;
  background: currentColor;
  height: 30%;
  transform-origin: bottom;
}

.motion-on:not([data-decor-paused="true"]) .equalizer i {
  animation: eq-bounce 1.15s var(--ease-suave) infinite alternate;
}

.equalizer i:nth-child(1) { animation-delay: 0ms;   height: 42%; }
.equalizer i:nth-child(2) { animation-delay: 140ms; height: 88%; }
.equalizer i:nth-child(3) { animation-delay: 280ms; height: 55%; }
.equalizer i:nth-child(4) { animation-delay: 90ms;  height: 100%; }
.equalizer i:nth-child(5) { animation-delay: 210ms; height: 62%; }

@keyframes eq-bounce {
  from { transform: scaleY(0.35); }
  to   { transform: scaleY(1); }
}

/* ---------------- Divisor ondulado ---------------- */

.wave-divider {
  display: block;
  position: relative; /* sem isto, fica "estática" e a silhueta (position:absolute) pinta por cima dela, não importa a ordem no HTML */
  z-index: var(--z-content);
  width: 100%;
  height: clamp(40px, 7vw, 90px);
  margin-bottom: -1px;
}

} /* fim de @layer components */