:root{--bg:#f6f5f1;--surface:#fff;--surface-2:#efede7;--border:#dedbd2;--text:#1f2421;--text-2:#5b625d;--text-3:#858b86;--accent:#2f6f62;--accent-text:#fff;--accent-soft:#e0eeea;--warn:#9a5b00;--warn-soft:#fbefd9;--error:#b3261e;--error-soft:#fbe3e1;--ok:#2e7d32;--ok-soft:#e3f1e3;--chart-1:#128a70;--radius:12px;--radius-sm:8px;--shadow:0 1px 2px #0000000d, 0 2px 8px #0000000a;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono:ui-monospace, "Cascadia Mono", Consolas, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#151816;--surface:#1d211f;--surface-2:#262b28;--border:#343a36;--text:#e8ebe8;--text-2:#aeb5b0;--text-3:#838a85;--accent:#6fb8a6;--accent-text:#0f1d19;--accent-soft:#1f3530;--warn:#e7b35f;--warn-soft:#3a2e1a;--error:#f08a82;--error-soft:#3b1f1d;--ok:#86c98a;--ok-soft:#1e3320;--chart-1:#34a88c;--shadow:none;--lightningcss-light: 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var(--border);background:var(--surface);min-height:44px;color:var(--text);font:inherit;cursor:pointer;justify-content:center;align-items:center;gap:8px;padding:0 18px;font-weight:600;text-decoration:none;display:inline-flex}.btn:hover:not(:disabled){background:var(--surface-2)}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.btn-primary:hover:not(:disabled){background:var(--accent);filter:brightness(1.08)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-small{min-height:34px;padding:0 12px;font-size:.9rem}.btn-link{color:var(--accent);background:0 0;border:none;min-height:0;padding:0;font-weight:500}.btn-row{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.input,.select{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);min-height:44px;color:var(--text);font:inherit;width:100%;padding:0 12px}textarea.input{resize:vertical;min-height:80px;padding:10px 12px}.field{flex-direction:column;gap:6px;display:flex}.field label{font-size:.92rem;font-weight:600}.field .hint{color:var(--text-3);font-size:.85rem}.check{cursor:pointer;align-items:center;gap:8px;min-height:44px;display:inline-flex}.check input{width:18px;height:18px}.chip{background:var(--surface-2);color:var(--text-2);white-space:nowrap;border-radius:999px;padding:2px 10px;font-size:.8rem;display:inline-block}.chip-accent{background:var(--accent-soft);color:var(--accent)}.chip-warn{background:var(--warn-soft);color:var(--warn)}.muted{color:var(--text-2)}.small{font-size:.88rem}.mono{font-family:var(--mono);font-size:.85rem}.alert{border-radius:var(--radius-sm);border:1px solid #0000;padding:12px 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table{border-collapse:collapse;width:100%;margin:10px 0;font-size:.93rem;display:block;overflow-x:auto}.md th,.md td{border:1px solid var(--border);text-align:left;vertical-align:top;padding:6px 10px}.md th{background:var(--surface-2)}.md details{background:var(--surface-2);border-radius:var(--radius-sm);margin:10px 0;padding:8px 12px}.md summary{cursor:pointer;min-height:32px;font-weight:600}.md h2,.md h3{margin-top:1.2em}.md hr{border:none;border-top:1px solid var(--border)}.md code{font-family:var(--mono);background:var(--surface-2);border-radius:4px;padding:0 4px}.tabs{border-bottom:1px solid var(--border);gap:4px;margin-bottom:16px;display:flex;overflow-x:auto}.tab{font:inherit;color:var(--text-2);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;min-height:44px;padding:10px 14px}.tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.issue{border-bottom:1px solid var(--border);padding:12px 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14px;display:flex}.option:hover:not(:disabled){border-color:var(--accent)}.option.selected{border-color:var(--accent);background:var(--accent-soft)}.option.correct{border-color:var(--ok);background:var(--ok-soft);color:var(--ok)}.option.wrong{border-color:var(--error);background:var(--error-soft);color:var(--error)}.option.dim{opacity:.55}.option:disabled{cursor:default}.option-num{background:var(--surface-2);min-width:22px;height:22px;color:var(--text-3);border-radius:6px;justify-content:center;align-items:center;font-size:.75rem;font-weight:600;display:inline-flex}.answer-input{flex:260px;min-height:52px;font-size:1.15rem}.audio-q{flex-wrap:wrap;gap:10px;display:flex}.tokens,.build-line{flex-wrap:wrap;gap:8px;display:flex}.build-line{border:1px dashed var(--border);border-radius:var(--radius-sm);align-items:center;min-height:56px;padding:8px}.token{border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface-2);min-height:42px;color:var(--text);font:inherit;cursor:pointer;padding:0 14px}.token-chosen{background:var(--accent-soft);border-color:var(--accent)}.match{grid-template-columns:1fr 1fr;grid-auto-rows:1fr;gap:10px;display:grid}.match .option{height:100%}.shake{animation:.3s shake}@keyframes shake{25%{transform:translate(-4px)}75%{transform:translate(4px)}}@media (prefers-reduced-motion:reduce){.shake{animation:none}.progress>div{transition:none}}.big-word{font-size:2rem;font-weight:700}.big-ru{font-size:1.3rem}.example-box{background:var(--surface-2);border-radius:var(--radius-sm);padding:10px 14px}.feedback{border-radius:var(--radius-sm);flex-direction:column;gap:8px;margin-top:18px;padding:14px 16px;display:flex}.feedback-ok{background:var(--ok-soft)}.feedback-bad{background:var(--error-soft)}.feedback-neutral{background:var(--surface-2)}.feedback-title{font-size:1.1rem;font-weight:700}.feedback-ok .feedback-title{color:var(--ok)}.feedback-bad .feedback-title{color:var(--error)}.grades{grid-template-columns:repeat(4,1fr);gap:8px;margin-top:4px;display:grid}@media (width<=560px){.grades{grid-template-columns:1fr 1fr}}.grade{padding:0 8px}.skip-row{text-align:right;margin-top:14px}.mode-list{gap:8px;display:grid}.mode{border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;align-items:flex-start;gap:12px;padding:12px 14px;display:flex}.mode.active{border-color:var(--accent);background:var(--accent-soft)}.mode input{width:18px;height:18px;margin-top:4px}.mode span{flex-direction:column;gap:2px;display:flex}.login{flex-direction:column;gap:14px;max-width:380px;margin:12vh auto 0;padding:0 16px;display:flex}.why{margin:4px 0 0;padding-left:20px}.why li+li{margin-top:4px}.chart{width:100%;height:auto;margin:8px 0;display:block}.chart-bar{fill:var(--chart-1)}.chart-bar.active{opacity:.75}.chart-axis{stroke:var(--border);stroke-width:1px}.chart-label{fill:var(--text-3);font-size:11px}.chart-head{flex-wrap:wrap;justify-content:space-between;gap:8px;display:flex}.table{border-collapse:collapse;width:100%;font-size:.92rem}.table th,.table td{text-align:left;border-bottom:1px solid var(--border);padding:6px 8px}.table th{color:var(--text-3);font-weight:600}.meter{background:var(--surface-2);border-radius:999px;height:8px;margin:4px 0;overflow:hidden}.meter>div{background:var(--chart-1);border-radius:999px;height:100%}.lesson-row{border-bottom:1px solid var(--border);padding:10px 0}.lesson-row:last-child{border-bottom:none}.lesson-title{flex-wrap:wrap;justify-content:space-between;gap:8px;display:flex}.listen-now{text-align:center}.listen-now .btn-row{justify-content:center}.speaking{color:var(--accent)}.example-box.speaking{outline:2px solid var(--accent)}.said-ok{color:var(--ok)}.said-miss{color:var(--error);text-underline-offset:4px;-webkit-text-decoration:underline wavy;text-decoration:underline wavy}.btn-recording{background:var(--error);border-color:var(--error);color:#fff}.ai-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);white-space:pre-wrap;padding:10px 12px}