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var(--line);border-radius:10px;height:60dvh;margin-top:14px}.toast{bottom:calc(24px + var(--nav-h));background:var(--ink);color:var(--panel);z-index:40;border-radius:999px;max-width:calc(100% - 32px);padding:11px 20px;font-size:14px;position:fixed;left:50%;transform:translate(-50%);box-shadow:0 8px 24px #0003}.toast[hidden]{display:none}@media (width<=900px){.tiles{grid-template-columns:1fr 1fr}.chart-grid{grid-template-columns:1fr}}@media (width<=640px){:root{--nav-h:calc(62px + env(safe-area-inset-bottom))}body{font-size:15px}.topbar{gap:12px;padding:10px 16px 14px}.hanko{width:28px;height:36px;font-size:13px}.brand-text{font-size:18px}.nav{z-index:15;height:var(--nav-h);padding:6px 8px env(safe-area-inset-bottom);background:var(--panel);border-top:1px solid var(--line);justify-content:space-around;gap:0;position:fixed;bottom:0;left:0;right:0}.nav a{border-radius:10px;flex-direction:column;flex:1;gap:0;padding:4px 10px;font-size:11px}.nav-jp{opacity:.55;font-size:20px;line-height:1.2}.nav a.active{color:var(--ink);background:0 0}.nav a.active .nav-jp{opacity:1}main{padding:22px 16px calc(28px + var(--nav-h));gap:16px}h1{font-size:23px}.grid2{grid-template-columns:1fr}.hero{gap:16px;padding:16px}.hero .ring{width:80px;height:80px}.streak{display:none}.deck{padding:12px 14px 12px calc(14px + var(--depth) * 14px)}.deck-name{font-size:16px}.count{min-width:40px;padding:3px 4px}.count small{display:none}.deck-progress{flex-direction:column;align-items:stretch;gap:4px;margin-left:32px}.deck-progress .meter{flex:none;max-width:none}.overview-counts div{flex:1;min-width:0}.overview-counts,.btn.big{width:100%}.tiles{gap:10px}.tile{padding:14px}.tile b{font-size:23px}.ring-tile,.tile:last-child{grid-column:1/-1}.chart{height:170px}.browse{grid-template-columns:1fr;height:auto}.browse-list{height:46dvh}.hide-sm,body.studying .topbar,body.studying .nav{display:none}body.studying{--nav-h:0px}.study-wrap{height:100dvh}.study-top{gap:8px;padding:8px 10px}.answer-bar{padding:10px 12px calc(12px + env(safe-area-inset-bottom));gap:10px}.answer-bar .show{width:100%;min-width:0}.answer{text-align:center;flex:1;grid-template-columns:1fr;justify-items:center;padding:14px}.answer kbd{display:none}.answer-ivl{grid-row:auto}kbd{display:none}}