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.key-group.touch-only,.keyboard .key-group[hidden],.keyboard.hide-extra .key-group.extra{display:none}.keyboard .key,.keyboard-full .key{border:0;border-right:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--surface);border-radius:0;min-width:0;height:40px;padding:0 1px;font-size:19px}.keyboard .key-group:nth-child(2n) .key{background:var(--surface-2)}.keyboard .key.space{grid-column:span 2;min-width:0}.key:active{transform:none}}@media (width<=400px){.app-header .brand{min-width:0;font-size:1rem}.brand-name{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.lang-slot{gap:6px}.support-link,.lang-menu>summary{padding:6px 10px}.charts-dialog{width:auto;inset:auto 8px 8px}.lang-menu-list{grid-template-columns:1fr 1fr;width:auto;position:fixed;top:64px;left:16px;right:16px}.card-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:6px}.ad-banner{max-width:320px;min-height:100px}.vowel-heights{width:48px;font-size:.7rem}.vowel-axes{margin-left:60px}.vowel-chart{margin:12px 24px 16px 12px}}@media (prefers-reduced-motion:reduce){.key.pressed{animation:none}.key,.toast{transition:none}}:lang(ko) :is(p,h1,h2,h3,li){word-break:keep-all;overflow-wrap:anywhere}