/*
 * Menu do topo, igual na home e na página do Skill Snake.
 * Fica no fluxo do topo da página (position: absolute, não fixed): quando a
 * página do jogo rola, o menu sobe junto e nunca cobre o placar ou o tabuleiro.
 */

.site-nav {
    position: absolute;
    top: 1rem;
    left: 0;
    right: 0;
    z-index: 20;
    display: flex;
    justify-content: center;
    padding: 0 1rem;
    pointer-events: none;
}

.site-nav-bar {
    pointer-events: auto;
    position: relative;
    width: 100%;
    max-width: 1008px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.55rem 0.6rem 0.55rem 1.25rem;
    border-radius: 16px;
    background: rgba(11, 15, 25, 0.62);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.7);
}

/* Filete em gradiente azul para roxo na base da barra */
.site-nav-bar::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(to right, rgba(96, 165, 250, 0), #60a5fa 25%, #8b5cf6 75%, rgba(139, 92, 246, 0));
    opacity: 0.7;
}

.site-nav-brand {
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    text-decoration: none;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.site-nav-list {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.site-nav-link {
    display: block;
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid transparent;
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.site-nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* Item da página atual, marcado no HTML de cada página com aria-current="page" */
.site-nav-link[aria-current="page"] {
    color: var(--text-primary);
    background: linear-gradient(to right, rgba(96, 165, 250, 0.22), rgba(139, 92, 246, 0.22));
    border-color: rgba(139, 92, 246, 0.35);
}

.site-nav-link:focus-visible,
.site-nav-brand:focus-visible,
.site-nav-toggle:focus-visible {
    outline: 2px solid #8b5cf6;
    outline-offset: 2px;
}

/* Botão do menu, visível só em tela estreita */
.site-nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.site-nav-toggle-bar {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(2) {
    opacity: 0;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 640px) {
    .site-nav {
        top: 0.75rem;
        padding: 0 0.75rem;
    }

    .site-nav-bar {
        padding: 0.45rem 0.45rem 0.45rem 1rem;
    }

    .site-nav-toggle {
        display: flex;
    }

    /* A lista vira um painel que abre abaixo da barra */
    .site-nav-list {
        position: absolute;
        top: calc(100% + 0.5rem);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
        padding: 0.5rem;
        border-radius: 14px;
        background: rgba(11, 15, 25, 0.92);
        border: 1px solid rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        box-shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.8);
        display: none;
    }

    .site-nav-list.is-open {
        display: flex;
    }

    .site-nav-link {
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .site-nav-link,
    .site-nav-toggle-bar {
        transition: none;
    }
}