body{padding-left:70px}
.masthead{position:fixed;inset:0 auto 0 0;width:70px;height:100svh;padding:26px 0 20px;display:flex;flex-direction:column;align-items:center;border:0;border-right:1px solid rgba(48,40,35,.26);background:rgba(238,232,220,.94);mix-blend-mode:normal;backdrop-filter:blur(10px)}
.masthead>a{writing-mode:vertical-rl;transform:rotate(180deg);font:1.15rem var(--serif);letter-spacing:.16em}
.masthead>span{writing-mode:vertical-rl;transform:rotate(180deg);margin:auto 0;font-size:.5rem;letter-spacing:.14em}
.masthead button{writing-mode:vertical-rl;transform:rotate(180deg);padding:0;border:0;background:none;font:500 .56rem var(--sans);letter-spacing:.13em;cursor:pointer}
.masthead nav{position:fixed;inset:0 0 0 70px;width:auto;padding:12vh 9vw;background:var(--cocoa);color:var(--paper);display:none;align-content:center;z-index:-1}
.masthead nav.is-open{display:grid}
.masthead nav a{display:grid;grid-template-columns:80px 1fr;align-items:baseline;padding:1rem 0;border:0;border-bottom:1px solid rgba(238,232,220,.28);font:clamp(2.8rem,7vw,7rem)/.9 var(--serif);letter-spacing:-.04em;text-transform:none}
.masthead nav a::before{font:500 .56rem var(--sans);letter-spacing:.13em}
.masthead nav a:nth-child(1)::before{content:"01"}.masthead nav a:nth-child(2)::before{content:"02"}.masthead nav a:nth-child(3)::before{content:"03"}.masthead nav a:nth-child(4)::before{content:"08"}
@media(max-width:800px){body{padding-left:0;padding-top:58px}.masthead{inset:0 0 auto 0;width:100%;height:58px;padding:0 5vw;display:grid;grid-template-columns:1fr auto;background:rgba(238,232,220,.96);border-right:0;border-bottom:1px solid rgba(48,40,35,.26)}.masthead>a,.masthead button{writing-mode:initial;transform:none}.masthead>span{display:none}.masthead nav{inset:58px 0 0;width:auto;padding:10vh 7vw}.masthead nav a{grid-template-columns:45px 1fr;font-size:clamp(2.5rem,13vw,5rem)}}