/* CSS para Névoa Cósmica Interativa */
.placeholder-nevoa-cosmica {
    position: relative;
    width: 100%;
    height: 192px; /* h-48 from Tailwind is 12rem = 192px */
    background-color: #1a001a; /* Roxo escuro como base */
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.5s ease, opacity 0.5s ease;
}

/* Simple Loader */
.placeholder-nevoa-cosmica::before {
    content: '';
    box-sizing: border-box;
    position: absolute;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.6);
    border-top-color: #8b5cf6; /* Tailwind purple-500 */
    animation: nevoa-loader-spin 1s linear infinite;
    z-index: 10;
    transition: opacity 0.3s ease;
}

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

.placeholder-nevoa-cosmica.loaded::before {
    opacity: 0;
    animation: none; /* Stop animation when hidden */
}

.placeholder-nevoa-cosmica .particle-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transition: opacity 0.5s ease 0.2s; /* Delay opacity transition slightly */
}

.placeholder-nevoa-cosmica.loaded .particle-layer {
    opacity: 0;
}

.placeholder-nevoa-cosmica .particle {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    /* Base animation properties, JS will override delay and duration */
    animation-name: nevoa-particle-float, nevoa-particle-twinkle;
    animation-timing-function: linear, ease-in-out;
    animation-iteration-count: infinite, infinite;
    animation-direction: normal, alternate;
}

@keyframes nevoa-particle-float {
    0% { transform: translateY(0px) translateX(0px); }
    25% { transform: translateY(-8px) translateX(4px); }
    50% { transform: translateY(0px) translateX(8px); }
    75% { transform: translateY(8px) translateX(4px); }
    100% { transform: translateY(0px) translateX(0px); }
}

@keyframes nevoa-particle-twinkle {
    0% { opacity: 0.2; transform: scale(0.6); }
    50% { opacity: 0.7; transform: scale(1); }
    100% { opacity: 0.2; transform: scale(0.6); }
}

/* Optional: A subtle static background pattern if particles are too sparse initially */
.placeholder-nevoa-cosmica {
    background-image: radial-gradient(circle at 20% 30%, rgba(200, 150, 255, 0.05) 0%, transparent 40%),
                      radial-gradient(circle at 80% 70%, rgba(150, 200, 255, 0.05) 0%, transparent 40%);
}