:root{--bg:linear-gradient(180deg, #1d326e, #234742);--fg:#fff;--fg-dim:#8fa3c0;--correct:#22c55e;--wrong:#eab308;--surface:#122a4d;--border:#1f3a63;--button-bg:#31608c;--tier-mastered:#3b82f6;--tier-good:#22c55e;--tier-ok:#eab308;--tier-bad:#f97316;--tier-learning:#6b7280;--sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;font:18px/1.4 var(--sans);font-variant-numeric:tabular-nums;color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased}*{box-sizing:border-box}html,body{height:100%;margin:0;overflow:hidden}body{background:var(--bg);overscroll-behavior:none}#root{flex-direction:column;height:100dvh;display:flex;overflow:hidden}button{font:inherit;color:inherit;cursor:pointer;background:0 0;border:none}a{color:inherit}.practice-screen{touch-action:manipulation;-webkit-user-select:none;user-select:none}._screen_15wdt_1{flex-direction:column;flex:1;align-items:center;padding:24px;display:flex}._content_15wdt_9{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:48px;min-height:0;display:flex}._userCode_15wdt_19{color:var(--fg-dim);letter-spacing:.05em;margin:0;padding-top:8px;font-size:14px}._grid_15wdt_27{grid-template-columns:repeat(2,1fr);gap:20px;width:min(640px,100%);display:grid}._operationButton_15wdt_34{background:var(--button-bg);overflow-wrap:break-word;border:none;border-radius:16px;min-width:0;padding:clamp(20px,6vw,40px) 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8px;font-size:48px;font-weight:400}._nameButton_1478j_25,._addButton_1478j_26,._continueButton_1478j_27{background:var(--button-bg);border:none;border-radius:12px;padding:20px;font-size:28px}._addButton_1478j_26{color:var(--fg-dim)}._form_1478j_39{flex-direction:column;gap:16px;width:min(420px,100%);display:flex}._input_1478j_46{background:var(--surface);border:1px solid var(--border);color:var(--fg);border-radius:12px;padding:20px;font-size:28px}._error_1478j_55{color:var(--wrong)}._cancelButton_1478j_59{color:var(--fg-dim)}._showCode_1478j_63{text-align:center;flex-direction:column;align-items:center;gap:16px;width:min(420px,100%);display:flex}._showCodeLabel_1478j_72{color:var(--fg-dim);text-transform:uppercase;letter-spacing:.1em;font-size:16px}._code_1478j_79{letter-spacing:.15em;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:24px 32px;font-size:64px;font-weight:600}._hint_1478j_89{color:var(--fg-dim);font-size:16px}._screen_1sdw3_1{flex-direction:column;flex:1;gap:10px;min-height:0;padding:16px 24px;display:flex;overflow:hidden}._header_1sdw3_11{align-items:center;gap:16px;display:flex}._backButton_1sdw3_17{color:var(--fg-dim)}._title_1sdw3_21{margin:0;font-size:20px;font-weight:600}._tabs_1sdw3_27{gap:8px;display:flex}._tab_1sdw3_27,._tabActive_1sdw3_33{border-radius:8px;padding:8px 20px;font-size:20px}._tab_1sdw3_27{color:var(--fg-dim)}._tabActive_1sdw3_33{background:var(--button-bg);border:none}._matrixWrap_1sdw3_51{flex:1;justify-content:center;align-items:center;min-height:0;display:flex;container-type:size}._matrix_1sdw3_51{grid-template-rows:repeat(13,1fr) 20px;grid-template-columns:20px 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