/* =============================================
   LOADING - Componente Compartilhado
   /shared/loading.css

   Overlay de carregamento com quadrado azul girando
   Usado em: pagina principal + todos os paineis administrativos
   ============================================= */

/* ===== OVERLAY PRINCIPAL ===== */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading, 9999);
    transition: opacity 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

/* Versao alternativa para display none */
.loading-overlay[hidden] {
    display: none !important;
}

/* ===== QUADRADO AZUL GIRANDO ===== */
.loading-cube {
    width: 50px;
    height: 50px;
    border: 3px solid var(--neon-blue, #00D4FF);
    animation: loader-spin 1s infinite ease-in-out;
}

@keyframes loader-spin {
    0% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(0.8); }
    100% { transform: rotate(360deg) scale(1); }
}

/* ===== SPINNER CIRCULAR (para secoes internas, botoes) ===== */
.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(0, 212, 255, 0.2);
    border-top-color: var(--neon-blue, #00D4FF);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

/* Spinner pequeno para botoes */
.loading-spinner.small {
    width: 20px;
    height: 20px;
    border-width: 2px;
    margin: 0;
}

/* Spinner grande para tela inteira */
.loading-spinner.large {
    width: 80px;
    height: 80px;
    border-width: 4px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== INLINE LOADING (para secoes) ===== */
.section-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    min-height: 200px;
}

.section-loading .loading-spinner {
    margin-bottom: 0;
}

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0.03) 0%,
        rgba(255, 255, 255, 0.08) 50%,
        rgba(255, 255, 255, 0.03) 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-md, 8px);
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ===== RESPONSIVO ===== */
@media (max-width: 768px) {
    .loading-cube {
        width: 40px;
        height: 40px;
    }

    .loading-spinner {
        width: 40px;
        height: 40px;
    }

    .loading-spinner.large {
        width: 60px;
        height: 60px;
    }
}