/* ═══════════════════════════════════════════════════════════════════════════
   Bird Tech — loja de periféricos da PC Formatech
   Paleta tirada do logo: azul profundo do pássaro e o azul-claro das asas.
   O tema claro/escuro segue o mesmo botão das outras páginas (data-theme).
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
    --bt-azul: #1a47b8;
    --bt-azul-2: #2f7fe0;
    --bt-ceu: #33b5f5;
    --bt-whats: #15803d;

    --bt-fundo: #f3f6fb;
    --bt-superficie: #ffffff;
    --bt-superficie-2: #eef3fa;
    --bt-texto: #0f1d33;
    --bt-suave: #52627a;
    --bt-borda: #dbe4f0;
    --bt-sombra: 0 1px 2px rgba(15, 29, 51, 0.06), 0 14px 34px -20px rgba(26, 71, 184, 0.35);
    --bt-raio: 18px;

    --bt-fonte-titulo: 'Sora', 'Segoe UI', system-ui, sans-serif;
    --bt-fonte: 'Manrope', 'Segoe UI', system-ui, sans-serif;
    color-scheme: light;
}

html[data-theme='dark'] {
    --bt-azul: #5b8dff;
    --bt-azul-2: #4fa3ff;
    --bt-ceu: #5cc8ff;
    --bt-fundo: #0a1120;
    --bt-superficie: #111b2e;
    --bt-superficie-2: #16233a;
    --bt-texto: #e6eefb;
    --bt-suave: #9cb0cc;
    --bt-borda: rgba(120, 160, 230, 0.18);
    --bt-sombra: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 36px -20px rgba(0, 0, 0, 0.9);
    color-scheme: dark;
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(900px 480px at 85% -10%, color-mix(in srgb, var(--bt-ceu) 16%, transparent), transparent 70%),
        radial-gradient(700px 420px at -10% 10%, color-mix(in srgb, var(--bt-azul) 12%, transparent), transparent 70%),
        var(--bt-fundo);
    color: var(--bt-texto);
    font-family: var(--bt-fonte);
    font-size: 1rem;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

/* Ícones de traço da loja. Fica fora o botão de tema (theme-system.js), cujo
   ícone de lua é preenchido. */
:where(.bt-topo, main, .bt-detalhe) svg {
    width: 1.1em;
    height: 1.1em;
    flex: 0 0 auto;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.bt-oculto {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.bt-pular {
    position: absolute;
    left: 1rem;
    top: -3rem;
    z-index: 50;
    padding: 0.6rem 1rem;
    border-radius: 10px;
    background: var(--bt-azul);
    color: #fff;
    text-decoration: none;
}

.bt-pular:focus { top: 1rem; }

:focus-visible {
    outline: 3px solid var(--bt-ceu);
    outline-offset: 2px;
}

/* ── Topo ─────────────────────────────────────────────────────────────────── */

.bt-topo {
    position: sticky;
    top: 0;
    z-index: 20;
    background: color-mix(in srgb, var(--bt-fundo) 82%, transparent);
    -webkit-backdrop-filter: blur(14px) saturate(1.3);
            backdrop-filter: blur(14px) saturate(1.3);
    border-bottom: 1px solid var(--bt-borda);
}

.bt-topo-dentro {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0.7rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.bt-marca {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
}

.bt-marca img { width: 44px; height: 44px; }

.bt-marca strong {
    display: block;
    font-family: var(--bt-fonte-titulo);
    font-size: 1.2rem;
    line-height: 1.1;
    letter-spacing: -0.02em;
    background: linear-gradient(90deg, var(--bt-azul), var(--bt-ceu));
    -webkit-background-clip: text;
            background-clip: text;
    color: transparent;
}

.bt-marca small {
    display: block;
    font-size: 0.75rem;
    color: var(--bt-suave);
    font-weight: 600;
}

.bt-voltar {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 42px;
    padding: 0 0.95rem;
    border-radius: 999px;
    border: 1px solid var(--bt-borda);
    background: var(--bt-superficie);
    font-size: 0.875rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: var(--bt-sombra);
}

.bt-voltar:hover { border-color: var(--bt-azul-2); color: var(--bt-azul); }
.bt-voltar-curto { display: none; }

/* ── Chamada ──────────────────────────────────────────────────────────────── */

.bt-hero {
    max-width: 760px;
    margin: 0 auto;
    padding: 2.6rem 1rem 1.5rem;
    text-align: center;
}

.bt-hero-logo {
    width: 88px;
    height: 88px;
    margin: 0 auto 0.6rem;
    filter: drop-shadow(0 10px 24px color-mix(in srgb, var(--bt-azul) 35%, transparent));
}

.bt-selo {
    display: inline-block;
    margin: 0 0 0.9rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--bt-azul) 10%, transparent);
    color: var(--bt-azul);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bt-hero h1 {
    margin: 0 0 0.75rem;
    font-family: var(--bt-fonte-titulo);
    font-size: clamp(1.9rem, 5.2vw, 3rem);
    line-height: 1.08;
    letter-spacing: -0.035em;
}

.bt-hero h1 span {
    background: linear-gradient(90deg, var(--bt-azul), var(--bt-ceu));
    -webkit-background-clip: text;
            background-clip: text;
    color: transparent;
}

.bt-sub {
    max-width: 52ch;
    margin: 0 auto 1.4rem;
    color: var(--bt-suave);
    font-size: 1.02rem;
}

.bt-busca {
    position: relative;
    max-width: 520px;
    margin: 0 auto;
}

.bt-busca svg {
    position: absolute;
    left: 1.05rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--bt-suave);
    width: 1.2rem;
    height: 1.2rem;
}

.bt-busca input {
    width: 100%;
    min-height: 54px;
    padding: 0 1.1rem 0 3rem;
    border-radius: 999px;
    border: 1.5px solid var(--bt-borda);
    background: var(--bt-superficie);
    color: var(--bt-texto);
    font: inherit;
    font-size: 1rem;
    box-shadow: var(--bt-sombra);
}

.bt-busca input::placeholder { color: var(--bt-suave); }
.bt-busca input:focus { outline: none; border-color: var(--bt-azul-2); box-shadow: 0 0 0 4px color-mix(in srgb, var(--bt-azul-2) 18%, transparent); }

.bt-garantias {
    list-style: none;
    margin: 1.2rem 0 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1.2rem;
    color: var(--bt-suave);
    font-size: 0.85rem;
    font-weight: 600;
}

.bt-garantias li {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.bt-garantias svg { color: var(--bt-azul-2); }

/* ── Vitrine ──────────────────────────────────────────────────────────────── */

.bt-vitrine {
    max-width: 1180px;
    margin: 0 auto;
    padding: 1rem 1rem 2.5rem;
}

.bt-vitrine-topo {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.8rem;
}

.bt-vitrine h2 {
    margin: 0;
    font-family: var(--bt-fonte-titulo);
    font-size: 1.4rem;
    letter-spacing: -0.02em;
}

.bt-contagem {
    margin: 0;
    color: var(--bt-suave);
    font-size: 0.875rem;
    font-weight: 600;
}

.bt-categorias {
    display: flex;
    gap: 0.45rem;
    overflow-x: auto;
    padding: 0.2rem 0 0.9rem;
    scrollbar-width: none;
}

.bt-categorias::-webkit-scrollbar { display: none; }

.bt-categorias button {
    flex: 0 0 auto;
    min-height: 40px;
    padding: 0 1rem;
    border-radius: 999px;
    border: 1px solid var(--bt-borda);
    background: var(--bt-superficie);
    color: var(--bt-texto);
    font: inherit;
    font-size: 0.875rem;
    font-weight: 700;
    cursor: pointer;
}

.bt-categorias button[aria-pressed='true'] {
    background: var(--bt-azul);
    border-color: var(--bt-azul);
    color: #fff;
}

.bt-grade {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr));
    gap: 1.1rem;
}

.bt-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    border-radius: var(--bt-raio);
    border: 1px solid var(--bt-borda);
    background: var(--bt-superficie);
    box-shadow: var(--bt-sombra);
    overflow: hidden;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.bt-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--bt-azul-2) 45%, var(--bt-borda));
    box-shadow: 0 18px 40px -22px color-mix(in srgb, var(--bt-azul) 60%, transparent);
}

.bt-card-foto {
    display: block;
    padding: 0;
    border: 0;
    background: #dcdcdc;
    cursor: pointer;
}

.bt-card-foto img {
    width: 100%;
    height: auto;
    aspect-ratio: 940 / 907;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.bt-card:hover .bt-card-foto img { transform: scale(1.03); }

.bt-card-info {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.95rem 1rem 1rem;
}

.bt-card-cat {
    margin: 0;
    color: var(--bt-azul);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bt-card h3 {
    margin: 0;
    font-size: 1rem;
    line-height: 1.3;
    font-weight: 700;
}

.bt-card h3 button {
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.bt-preco {
    margin: 0.15rem 0 0.6rem;
    font-family: var(--bt-fonte-titulo);
    font-size: 1.45rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}

.bt-preco small {
    font-size: 0.8rem;
    font-weight: 700;
    margin-right: 0.15rem;
}

.bt-card .bt-botao {
    margin-top: auto;
    padding: 0 0.8rem;
    font-size: 0.875rem;
    white-space: nowrap;
}

/* Esqueleto enquanto carrega. */
.bt-esqueleto {
    aspect-ratio: 940 / 1240;
    background: linear-gradient(100deg, var(--bt-superficie) 30%, var(--bt-superficie-2) 50%, var(--bt-superficie) 70%);
    background-size: 300% 100%;
    animation: bt-brilho 1.3s linear infinite;
}

@keyframes bt-brilho {
    from { background-position: 100% 0; }
    to { background-position: -100% 0; }
}

.bt-vazio {
    padding: 2rem 1rem;
    border: 1px dashed var(--bt-borda);
    border-radius: var(--bt-raio);
    text-align: center;
    color: var(--bt-suave);
}

.bt-vazio p { margin: 0 0 0.4rem; }
.bt-vazio strong { color: var(--bt-texto); }
.bt-vazio .bt-botao { display: inline-flex; width: auto; margin-top: 0.8rem; }

/* ── Botões ───────────────────────────────────────────────────────────────── */

.bt-botao {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    min-height: 46px;
    padding: 0 1.1rem;
    border-radius: 12px;
    border: 0;
    font: inherit;
    font-size: 0.925rem;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    transition: filter 0.2s ease, transform 0.2s ease;
}

.bt-botao:hover { filter: brightness(1.08); }
.bt-botao:active { transform: translateY(1px); }

.bt-botao-whats { background: var(--bt-whats); color: #fff; }
.bt-botao-whats svg { width: 1.2rem; height: 1.2rem; }

.bt-botao-claro {
    width: auto;
    background: #fff;
    color: var(--bt-azul);
}

.bt-botao-contorno {
    background: transparent;
    color: var(--bt-texto);
    border: 1.5px solid var(--bt-borda);
}

/* ── Encomenda ────────────────────────────────────────────────────────────── */

.bt-encomenda {
    max-width: 1148px;
    margin: 0 auto 2.5rem;
    padding: 1.6rem 1.6rem;
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.2rem 2rem;
    flex-wrap: wrap;
    background: linear-gradient(120deg, #1a47b8 0%, #2f7fe0 60%, #33b5f5 100%);
    color: #fff;
    box-shadow: 0 24px 48px -28px rgba(26, 71, 184, 0.8);
}

.bt-encomenda h2 {
    margin: 0 0 0.3rem;
    font-family: var(--bt-fonte-titulo);
    font-size: 1.3rem;
}

.bt-encomenda p { margin: 0; max-width: 56ch; opacity: 0.92; }

/* ── Rodapé ───────────────────────────────────────────────────────────────── */

.bt-rodape {
    padding: 2rem 1rem 5rem;
    border-top: 1px solid var(--bt-borda);
    text-align: center;
    color: var(--bt-suave);
    font-size: 0.875rem;
}

.bt-rodape img { width: 64px; height: auto; margin: 0 auto 0.6rem; }
.bt-rodape p { margin: 0.25rem 0; }
.bt-rodape a { color: var(--bt-azul-2); font-weight: 700; }

/* ── Detalhe do produto ───────────────────────────────────────────────────── */

.bt-detalhe {
    width: min(920px, calc(100% - 2rem));
    max-height: calc(100dvh - 2rem);
    padding: 0;
    border: 1px solid var(--bt-borda);
    border-radius: 22px;
    background: var(--bt-superficie);
    color: var(--bt-texto);
    box-shadow: 0 40px 90px -30px rgba(0, 0, 0, 0.6);
    overflow: auto;
}

.bt-detalhe::backdrop {
    background: rgba(6, 12, 26, 0.6);
    -webkit-backdrop-filter: blur(4px);
            backdrop-filter: blur(4px);
}

.bt-detalhe-corpo {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
}

.bt-detalhe-corpo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #dcdcdc;
}

.bt-detalhe-info {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    padding: 2rem 1.6rem 1.6rem;
}

.bt-detalhe-cat {
    margin: 0;
    color: var(--bt-azul);
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bt-detalhe h2 {
    margin: 0;
    font-family: var(--bt-fonte-titulo);
    font-size: 1.5rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.bt-detalhe .bt-preco { font-size: 2rem; margin: 0.2rem 0 0.2rem; }

.bt-detalhe-desc {
    margin: 0 0 0.6rem;
    color: var(--bt-suave);
    white-space: pre-line;
}

.bt-fechar {
    position: absolute;
    top: 0.7rem;
    right: 0.7rem;
    z-index: 2;
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 0;
    background: rgba(15, 29, 51, 0.72);
    color: #fff;
    cursor: pointer;
}

/* Botão claro/escuro criado por theme-system.js. */
#themeToggleBtn {
    position: fixed;
    right: 16px;
    bottom: calc(16px + env(safe-area-inset-bottom));
    z-index: 30;
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border: 1px solid var(--bt-borda);
    border-radius: 50%;
    background: var(--bt-superficie);
    color: var(--bt-texto);
    box-shadow: var(--bt-sombra);
    cursor: pointer;
}

#themeToggleBtn svg { width: 20px; height: 20px; }

/* ── Telas pequenas ───────────────────────────────────────────────────────── */

@media (max-width: 640px) {
    .bt-voltar-longo { display: none; }
    .bt-voltar-curto { display: inline; }

    .bt-hero { padding-top: 1.6rem; }
    .bt-hero-logo { width: 68px; height: 68px; }

    /* Duas colunas de produtos no celular. */
    .bt-grade {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.65rem;
    }

    .bt-card-info { padding: 0.7rem 0.7rem 0.75rem; gap: 0.25rem; }
    .bt-card h3 { font-size: 0.86rem; }
    .bt-preco { font-size: 1.15rem; margin-bottom: 0.45rem; }
    .bt-card .bt-botao { min-height: 42px; font-size: 0.8rem; padding: 0 0.5rem; }
    .bt-card .bt-botao .bt-botao-longo { display: none; }

    .bt-detalhe-corpo { grid-template-columns: 1fr; }
    .bt-detalhe-corpo img { height: auto; aspect-ratio: 940 / 907; }
    .bt-detalhe-info { padding: 1.2rem 1.1rem 1.3rem; }

    .bt-encomenda { margin-inline: 1rem; padding: 1.3rem; }
    .bt-encomenda .bt-botao { width: 100%; }
}

@media (min-width: 641px) {
    .bt-card .bt-botao .bt-botao-curto { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; }
    html { scroll-behavior: auto; }
}