/*!
 * Adaptado de React Bits (https://reactbits.dev) – SpecularButton – licença MIT + Commons Clause
 *
 * Botão com brilho especular na borda (par de /static/js/fx/specular-button.js).
 * Funciona em <button> e em <a>. A camada do efeito (.specular-button__fx) nunca recebe cliques
 * e não altera a área clicável. Pensado para fundos escuros (texto claro).
 *
 * Variações: .specular-button--brand (vidro navy, luz ciano) · .specular-button--gold (luz dourada, CTA de lojista)
 * Tamanhos:  --sm · --md · --lg     Extras: --pill · --block
 */

.specular-button {
  --sb-radius: 18px;
  --sb-tint: #ffffff;
  --sb-tint-opacity: 0;
  --sb-blur: 0px;
  --sb-text-color: #f5f5f5;
  --sb-line: #ffffff;
  --sb-base: #525252;
  --sb-intensity: 1;
  --sb-focus: #24b6cd;
  --sb-focus-gap: #050b14;
  --sb-hover: rgba(255, 255, 255, 0.06);
  --sb-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), 0 8px 24px rgba(0, 0, 0, 0.25);

  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  box-sizing: border-box;
  margin: 0;
  border: 0;
  -webkit-appearance: none;
  appearance: none;
  font-family: inherit;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.1;
  text-align: center;
  text-decoration: none;
  vertical-align: middle;
  color: var(--sb-text-color);
  background-color: transparent;
  background-color: color-mix(in srgb, var(--sb-tint) calc(var(--sb-tint-opacity) * 100%), transparent);
  border-radius: var(--sb-radius);
  -webkit-backdrop-filter: blur(var(--sb-blur));
  backdrop-filter: blur(var(--sb-blur));
  box-shadow: var(--sb-shadow);
  cursor: pointer;
  /* sem contorno em repouso: no alto contraste do Windows o contorno transparente vira cor de sistema, e o repouso
     ficava igual ao foco. O contorno transparente (visível só no alto contraste) fica no :focus-visible. */
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  transition: transform 0.15s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}

/* links: vencem a cor/sublinhado globais de a, a:hover e a:visited */
.specular-button:link,
.specular-button:visited,
.specular-button:hover,
.specular-button:active,
.specular-button:focus {
  color: var(--sb-text-color);
  text-decoration: none;
}

@media (hover: hover) {
  .specular-button:hover {
    background-image: linear-gradient(var(--sb-hover), var(--sb-hover));
  }
}

.specular-button:active {
  transform: scale(0.97);
}

.specular-button:disabled,
.specular-button[disabled],
.specular-button[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}

.specular-button:disabled:active,
.specular-button[disabled]:active,
.specular-button[aria-disabled="true"]:active {
  transform: none;
}

@media (hover: hover) {
  .specular-button:disabled:hover,
  .specular-button[disabled]:hover,
  .specular-button[aria-disabled="true"]:hover {
    background-image: none;
  }
}

a.specular-button[disabled],
a.specular-button[aria-disabled="true"] {
  pointer-events: none;
}

/* ---------------------------------------------------------------- tamanhos (altura mínima 44px) */
.specular-button--sm {
  font-size: 0.875rem;
  padding: 10px 22px;
}

.specular-button--md {
  font-size: 1rem;
  padding: 14px 30px;
}

.specular-button--lg {
  font-size: 1.15rem;
  padding: 18px 40px;
  min-height: 52px;
}

.specular-button--pill {
  --sb-radius: 999px;
}

.specular-button--block {
  display: flex;
  width: 100%;
}

/* ---------------------------------------------------------------- camadas */
/* O canvas passa 4px da borda para o brilho "vazar" (precisa bater com PAD no JS). O original usa
   20px, mas o shader não desenha nada a mais de 3px da borda: 4px dá o mesmo resultado sem criar
   20px de overflow (barra de rolagem horizontal quando o botão encosta na borda do contêiner). */
.specular-button__fx {
  position: absolute;
  inset: -4px;
  z-index: 1;
  pointer-events: none;
}

.specular-button__fx canvas {
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.specular-button__label {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  min-width: 0;
}

/* Antes do JS (ou sem JS): uma borda estática discreta */
.specular-button:not([data-specular-state]) {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), var(--sb-shadow);
}

/* ---------------------------------------------------------------- fallback CSS (sem WebGL2 / acima do limite) */
/* Borda feita com conic-gradient girado por --sb-angle (atualizado pelo mesmo controlador de ponteiro).
   O gradiente é desenhado num quadrado h×h esticado para w×h (espaço normalizado, como a normal
   elíptica do shader) e a máscara deixa visível só o anel da borda. */
.specular-button[data-specular-state="css"] > .specular-button__fx {
  inset: 0;
  overflow: hidden;
  border-radius: inherit;
  padding: var(--sb-ring, 1.5px);
  background: rgba(82, 82, 82, 0.45);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
}

.specular-button__sheen {
  position: absolute;
  top: 0;
  left: 50%;
  width: var(--sb-sq, 100%);
  height: 100%;
  transform: translateX(-50%) scaleX(var(--sb-aspect, 1));
  opacity: var(--sb-bright, 0);
  background: conic-gradient(
    from var(--sb-angle, 0deg),
    var(--sb-line) 0deg,
    transparent var(--sb-spread, 50deg),
    transparent calc(180deg - var(--sb-spread, 50deg)),
    var(--sb-line) 180deg,
    transparent calc(180deg + var(--sb-spread, 50deg)),
    transparent calc(360deg - var(--sb-spread, 50deg)),
    var(--sb-line) 360deg
  );
}

@supports (color: color-mix(in srgb, red 50%, transparent)) {
  .specular-button[data-specular-state="css"] > .specular-button__fx {
    background: color-mix(in srgb, var(--sb-base) 45%, transparent);
  }

  /* degraus aproximam o smoothstep do rim do shader (tamanho 10° + fade 40°) */
  .specular-button__sheen {
    background: conic-gradient(
      from var(--sb-angle, 0deg),
      color-mix(in srgb, var(--sb-line) 85%, transparent) 0deg,
      color-mix(in srgb, var(--sb-line) 62%, transparent) calc(var(--sb-spread, 50deg) * 0.2),
      color-mix(in srgb, var(--sb-line) 30%, transparent) calc(var(--sb-spread, 50deg) * 0.5),
      transparent var(--sb-spread, 50deg),
      transparent calc(180deg - var(--sb-spread, 50deg)),
      color-mix(in srgb, var(--sb-line) 30%, transparent) calc(180deg - var(--sb-spread, 50deg) * 0.5),
      color-mix(in srgb, var(--sb-line) 62%, transparent) calc(180deg - var(--sb-spread, 50deg) * 0.2),
      color-mix(in srgb, var(--sb-line) 85%, transparent) 180deg,
      color-mix(in srgb, var(--sb-line) 62%, transparent) calc(180deg + var(--sb-spread, 50deg) * 0.2),
      color-mix(in srgb, var(--sb-line) 30%, transparent) calc(180deg + var(--sb-spread, 50deg) * 0.5),
      transparent calc(180deg + var(--sb-spread, 50deg)),
      transparent calc(360deg - var(--sb-spread, 50deg)),
      color-mix(in srgb, var(--sb-line) 30%, transparent) calc(360deg - var(--sb-spread, 50deg) * 0.5),
      color-mix(in srgb, var(--sb-line) 62%, transparent) calc(360deg - var(--sb-spread, 50deg) * 0.2),
      color-mix(in srgb, var(--sb-line) 85%, transparent) 360deg
    );
  }
}

/* navegador sem mask-composite: some a camada e fica uma borda estática */
@supports not ((mask-composite: exclude) or (-webkit-mask-composite: xor)) {
  .specular-button[data-specular-state="css"] > .specular-button__fx {
    display: none;
  }

  .specular-button[data-specular-state="css"] {
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18), var(--sb-shadow);
  }
}

/* ---------------------------------------------------------------- variação: marca (vidro navy, luz ciano) */
/* Texto #eef7fc sobre navy 72%: ≥ 5,9:1 mesmo sobre fundo branco; > 14:1 sobre o navy do site. */
.specular-button--brand {
  --sb-text-color: #eef7fc;
  --sb-line: #7fe3f2;
  --sb-base: #2a4a66;
  --sb-blur: 10px;
  --sb-tint: #0b1d2f;
  --sb-tint-opacity: 0.72;
  --sb-hover: rgba(36, 182, 205, 0.12);
  --sb-shadow: inset 0 1px 0 rgba(127, 227, 242, 0.08), 0 10px 28px -6px rgba(5, 11, 20, 0.55);
  font-weight: 600;
  /* fixo para navegadores sem color-mix; com ele, data-specular-tint / -tint-opacity também valem aqui */
  background-color: rgba(11, 29, 47, 0.72);
  background-color: color-mix(in srgb, var(--sb-tint) calc(var(--sb-tint-opacity) * 100%), transparent);
}

.specular-button--brand:not([data-specular-state]) {
  box-shadow: inset 0 0 0 1px rgba(127, 227, 242, 0.28), var(--sb-shadow);
}

/* ---------------------------------------------------------------- variação: dourado (CTA de lojista) */
/* Texto #f6ead0 sobre navy 80%: ≥ 7,5:1 mesmo sobre fundo branco. */
.specular-button--gold {
  --sb-text-color: #f6ead0;
  --sb-line: #e7d3a4;
  --sb-base: #5c4a26;
  --sb-intensity: 1.1;
  --sb-blur: 10px;
  --sb-tint: #0b1d2f;
  --sb-tint-opacity: 0.8;
  --sb-hover: rgba(231, 211, 164, 0.08);
  --sb-shadow: inset 0 1px 0 rgba(231, 211, 164, 0.1), 0 10px 28px -6px rgba(5, 11, 20, 0.55);
  font-weight: 600;
  background-color: rgba(11, 29, 47, 0.8);
  background-color: color-mix(in srgb, var(--sb-tint) calc(var(--sb-tint-opacity) * 100%), transparent);
  background-image: linear-gradient(180deg, rgba(201, 166, 94, 0.14), rgba(201, 166, 94, 0) 70%);
}

@media (hover: hover) {
  .specular-button--gold:hover {
    background-image:
      linear-gradient(var(--sb-hover), var(--sb-hover)),
      linear-gradient(180deg, rgba(201, 166, 94, 0.2), rgba(201, 166, 94, 0) 70%);
  }
}

.specular-button--gold:not([data-specular-state]) {
  box-shadow: inset 0 0 0 1px rgba(231, 211, 164, 0.3), var(--sb-shadow);
}

/* ---------------------------------------------------------------- foco (depois das variações para sempre vencer) */
.specular-button:focus-visible {
  outline: 2px solid transparent;
  outline-offset: 3px;
  border-radius: var(--sb-radius);
  /* anel duplo: escuro + ciano, visível tanto em fundo claro quanto escuro */
  box-shadow: 0 0 0 3px var(--sb-focus-gap), 0 0 0 5px var(--sb-focus), var(--sb-shadow);
}

/* ---------------------------------------------------------------- preferências do sistema */
@media (prefers-reduced-motion: reduce) {
  .specular-button {
    transition: none;
  }
}

@media (forced-colors: active) {
  .specular-button {
    border: 1px solid ButtonText;
  }

  .specular-button__fx {
    display: none;
  }

  /* 3 px de Highlight (em repouso só a borda de 1 px): o foco se distingue pela cor e pela espessura */
  .specular-button:focus-visible {
    outline: 3px solid Highlight;
  }
}

@media print {
  .specular-button__fx {
    display: none;
  }
}