.cloudia-btn,
.cloudia-btn:hover,
.cloudia-btn:focus {
    /* Gradient com ciclo completo das cores (para o shimmer no hover ficar continuo) */
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 25%, #ec4899 50%, #a855f7 75%, #6366f1 100%);
    background-size: 200% 200%;
    background-position: 0% 50%;
    color: #fff;
}

.cloudia-btn:hover {
    animation: cloudia-btn-shimmer 3s linear infinite;
}

@keyframes cloudia-btn-shimmer {
    0%   { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Centraliza verticalmente o icone dentro do botao. O framework define
   .md-btn{padding:2px 16px} e .md-btn>i.material-icons{margin-top:5px},
   o que deixa o conteudo levemente acima do centro com altura 32px.
   Aqui usamos flex pra centralizar exatamente, sem tocar no componente. */
.cloudia-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding-top: 2px;
    padding-bottom: 2px;
    line-height: 1;
}

.cloudia-btn > i.material-icons {
    color: #fff;
}

.cloudia-btn.md-btn > i.material-icons {
    margin-top: 0;
    line-height: 1;
}

/* Spinner Cloud.IA — anel com gradient conico girando + glow sutil.
   Uso: <div class="cloudia-spinner"></div>
   Tamanho customizavel via inline style (width/height iguais). */
.cloudia-spinner {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: conic-gradient(from 0deg,
        #6366f1,
        #a855f7,
        #ec4899,
        #6366f1);
    -webkit-mask: radial-gradient(circle, transparent 58%, black 60%);
            mask: radial-gradient(circle, transparent 58%, black 60%);
    animation: cloudia-spinner-rotate 1.2s linear infinite;
    filter: drop-shadow(0 0 6px rgba(168, 85, 247, 0.5));
}

@keyframes cloudia-spinner-rotate {
    to { transform: rotate(360deg); }
}