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7px;font-size:17px}.usage-choices{flex-wrap:wrap;gap:9px;display:flex}.usage-choice{min-width:60px;height:48px;color:var(--ink);background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-md);font-size:24px}.usage-choice.selected{border-color:var(--green-500);background:var(--green-100)}.usage-choice.correct{color:var(--green-700);border-color:var(--green-500);background:var(--green-100)}.usage-choice.wrong{color:var(--hard-fg);border-color:var(--danger-border);background:var(--danger-bg)}.usage-blank-answer{color:var(--green-700);margin:9px 0 0;font-size:18px}.usage-mistake{padding:8px 0;position:relative}.usage-mistake .usage-source{margin:0 0 9px}.usage-mistake .usage-source-text{font-size:21px}.usage-mistake-lines,.usage-mistake-blanks{gap:4px;display:grid}.usage-mistake-lines p,.usage-mistake-blanks p{margin:0;font-size:17px}.usage-mistake-wrong{color:var(--hard-fg)}.usage-mistake-right{color:var(--green-700)}.frequency-panel{gap:var(--space-5);flex-wrap:wrap;margin:12px 0 10px;display:flex}.frequency-panel+.word-tags,.frequency-panel+.lang-row,.word-tags+.lang-row{margin-top:0;margin-bottom:14px}.frequency-badge-wrap{position:relative}.frequency-badge{min-height:32px;color:var(--ink);cursor:pointer;font:inherit;background:0 0;border:0;border-radius:0;align-items:center;gap:6px;padding:3px 5px;display:inline-flex}.frequency-badge:hover{background:0 0}.frequency-badge:focus-visible{outline:2px solid color-mix(in srgb, var(--green-700) 35%, transparent);outline-offset:3px}.frequency-stars{color:#d4a017;letter-spacing:1px;direction:ltr;line-height:1}.frequency-stars span:not(:first-child){margin-inline-start:1px}.frequency-badge-missing .frequency-stars{color:var(--ink-muted)}.frequency-badge-title{letter-spacing:.06em;white-space:nowrap;font-size:12px;font-weight:700}.frequency-tooltip{z-index:10;top:calc(100% + 8px);border:1px solid var(--line);background:var(--surface);width:min(360px,100vw - 32px);color:var(--ink);border-radius:10px;padding:10px 12px;font-size:13px;line-height:1.55;position:absolute;inset-inline-start:0;box-shadow:0 12px 28px #00000029}.frequency-tooltip strong{color:var(--green-700)}.frequency-tooltip p{margin:7px 0 0}.frequency-tooltip small{color:var(--ink-muted);margin-top:8px;font-size:12px;display:block}@media (max-width:520px){.practice-study-note-collocations li{grid-template-columns:minmax(0,1fr);gap:1px}.usage-source{margin-bottom:12px;padding-bottom:10px}.usage-source-text,.usage-source-translation{font-size:22px;line-height:1.75}.usage-prompt{margin-block:12px;padding-bottom:10px;font-size:22px;line-height:1.75}.usage-order-tile{min-width:46px;min-height:46px;padding:8px 10px;font-size:19px}.frequency-panel{grid-template-columns:1fr;display:grid}.frequency-badge{justify-content:flex-start;width:100%}.frequency-tooltip{width:auto;margin-bottom:12px;position:relative;top:6px}}