/* Placeholders atténués mais lisibles (≥ 4,5:1 en clair comme en sombre) */
.ph-light::placeholder { color: light-dark(#6b7280, #8b95a5); opacity: 1; }      /* standard */
.ph-light::-webkit-input-placeholder { color: light-dark(#6b7280, #8b95a5); }    /* Chrome/Safari */
.ph-light::-moz-placeholder { color: light-dark(#6b7280, #8b95a5); opacity: 1; } /* Firefox */
.ph-light:-ms-input-placeholder { color: light-dark(#6b7280, #8b95a5); }         /* IE 10-11 */
.ph-light::-ms-input-placeholder { color: light-dark(#6b7280, #8b95a5); }        /* Edge ancien */