/**=====================
   3.2 header scss
==========================**/

header {
     padding: calc(15px + (24 - 15) * ((100vw - 320px) / (1920 - 320)))
          calc(15px + (100 - 15) * ((100vw - 320px) / (1920 - 320))) 0;
     display: flex;
     align-items: center;
     justify-content: space-between;
     position: absolute;
     width: 100%;
     z-index: 2;
     transition: all 0.5s ease;
     &.sticky {
          position: fixed;
          left: 0;
          top: 0;
          width: 100%;
          background-color: #20333d;
          padding: 15px calc(15px + (100 - 15) * ((100vw - 320px) / (1920 - 320)));
     }
}