:root{--hue-primary: 250;--hue-secondary: 180;--hue-success: 150;--hue-error: 0;--color-primary: hsl(var(--hue-primary), 80%, 60%);--color-primary-hover: hsl(var(--hue-primary), 80%, 50%);--color-secondary: hsl(var(--hue-secondary), 60%, 45%);--color-bg-base: #f3f4f6;--color-bg-mesh: #ffffff;--color-bg-card: #ffffff;--color-bg-input: #e5e7eb;--color-text-main: #1f2937;--color-text-muted: #6b7280;--color-text-inverted: #ffffff;--color-success: hsl(var(--hue-success), 70%, 40%);--color-error: hsl(var(--hue-error), 80%, 55%);--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 4px 6px rgba(0, 0, 0, .05), 0 10px 15px rgba(0, 0, 0, .1);--shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04)}body{margin:0;min-height:100vh;background-color:var(--color-bg-base);color:var(--color-text-main);font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.6}*,*:before,*:after{box-sizing:border-box}#root{width:100%;margin:0;padding:0;box-sizing:border-box}h1,h2,h3{line-height:1.2;margin-bottom:.5em}button{cursor:pointer;border:none;font-family:inherit}._button_31c1j_1{padding:.8rem 1.5rem;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;transition:all .2s ease;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}._primary_31c1j_25{background-color:var(--color-primary);color:#fff}._primary_31c1j_25:hover{background-color:var(--color-primary-hover);transform:translateY(-1px)}._secondary_31c1j_45{background-color:transparent;border:2px solid var(--color-primary);color:var(--color-primary)}._secondary_31c1j_45:hover{background-color:#646cff1a}._danger_31c1j_65{background-color:var(--color-error);color:#fff}._danger_31c1j_65:hover{background-color:#dc2626}._success_31c1j_83{background-color:#10b981;color:#fff}._success_31c1j_83:hover{background-color:#059669;transform:translateY(-1px)}._card_1dvck_1{background-color:var(--color-bg-card);border-radius:var(--radius-md);padding:1.5rem;box-shadow:var(--shadow-sm);border:1px solid rgba(0,0,0,.05);transition:transform .2s ease,box-shadow .2s ease}._hoverable_1dvck_19{cursor:pointer}._hoverable_1dvck_19:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border:1px solid var(--color-primary)}._collectionContainer_1qhuh_1{width:100%;min-height:100vh;display:flex;flex-direction:column}._header_1qhuh_15{width:100%;background-color:#fff;box-shadow:var(--shadow-sm);margin-bottom:2rem;display:flex;justify-content:center;position:sticky;top:0;z-index:50}._headerContent_1qhuh_39{width:100%;max-width:800px;padding:1rem;display:flex;flex-direction:column;gap:1rem}._topBar_1qhuh_57{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;width:100%}._topBar_1qhuh_57 h1{font-size:1.25rem;font-weight:700;margin:0;text-align:center;color:#0f172a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}._menuContainer_1qhuh_93{position:relative;justify-self:end;z-index:1001}._menuBackdrop_1qhuh_105{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#0003;z-index:990;cursor:default}._actionsArea_1qhuh_127{display:flex;justify-content:center;gap:1rem}._actionButtons_1qhuh_147{display:flex;gap:1rem}._header_1qhuh_15 h1{font-size:1.25rem;font-weight:700;margin:0;text-align:center;color:#0f172a}._menuIcon_1qhuh_175{display:flex;flex-direction:column;gap:4px;cursor:pointer}._bar_1qhuh_189{width:24px;height:3px;background-color:var(--color-text-main);border-radius:2px}._content_1qhuh_211{width:100%;max-width:800px;margin:0 auto;padding:0 1rem 2rem;box-sizing:border-box}._breadcrumbs_1qhuh_227 a{color:var(--color-text-muted)}._breadcrumbs_1qhuh_227 a:hover{color:var(--color-primary)}._backLink_1qhuh_243{text-decoration:none;color:var(--color-text-muted);font-weight:500}._backLink_1qhuh_243:hover{color:var(--color-primary)}._modalOverlay_1qhuh_265{position:fixed;inset:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:100;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}._addCard_1qhuh_293{width:90%;max-width:500px;margin-bottom:0}._addCard_1qhuh_293 h3{margin-top:0;margin-bottom:1.5rem}._formGrid_1qhuh_317{display:flex;flex-direction:column;gap:1rem;margin-bottom:1.5rem}._formGrid_1qhuh_317 input{margin-bottom:0;width:100%;padding:.8rem;border:1px solid #e2e8f0;border-radius:var(--radius-sm);font-size:1rem;background-color:var(--color-bg-input);transition:border-color .2s}._modalActions_1qhuh_353{display:flex;justify-content:flex-end;gap:1rem}._wordList_1qhuh_365{display:flex;flex-direction:column;gap:.5rem}._wordItem_1qhuh_377{display:grid;grid-template-columns:1fr 1fr 2fr;align-items:center;padding:1rem;background-color:var(--color-bg-card);border-radius:var(--radius-sm);border-bottom:1px solid rgba(0,0,0,.05)}._char_1qhuh_397{font-size:1.5rem;color:var(--color-primary)}._pinyin_1qhuh_407{color:var(--color-secondary)}._def_1qhuh_415{color:var(--color-text-muted)}._empty_1qhuh_423{text-align:center;color:var(--color-text-muted);margin-top:3rem;padding:3rem;background-color:#fff;border-radius:var(--radius-sm);border:1px dashed #e2e8f0}._sentenceInput_1qhuh_445{width:100%;margin-bottom:1.5rem;padding:.8rem;border:1px solid #e2e8f0;border-radius:var(--radius-sm);font-size:1rem;background-color:var(--color-bg-input);font-family:inherit;resize:vertical}._segmentResults_1qhuh_469 p{margin:0;color:var(--color-text-muted)}._segmentHeader_1qhuh_479{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}._selectAllBtn_1qhuh_493{background:none;border:none;color:var(--color-primary);font-size:.9rem;font-weight:500;cursor:pointer;padding:0}._selectAllBtn_1qhuh_493:hover{text-decoration:underline}._segmentGrid_1qhuh_521{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem;max-height:300px;overflow-y:auto}._segmentChip_1qhuh_539{padding:.5rem 1rem;background-color:var(--color-bg-base);border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;transition:all .2s;-webkit-user-select:none;user-select:none}._segmentChip_1qhuh_539:hover{background-color:#e5e7eb}._segmentChip_1qhuh_539._selected_1qhuh_567{background-color:var(--color-primary);color:#fff;border-color:var(--color-primary)}._segmentChip_1qhuh_539._existing_1qhuh_579{opacity:.5;cursor:not-allowed;background-color:#f3f4f6;color:#9ca3af;border-color:transparent}._progressContainer_1qhuh_595{width:100%;margin-top:1rem}._progressBar_1qhuh_605{width:100%;height:8px;background-color:#e2e8f0;border-radius:9999px;overflow:hidden;margin-bottom:.5rem}._progressFill_1qhuh_623{height:100%;background-color:var(--color-primary);transition:width .3s ease}._progressContainer_1qhuh_595 p{text-align:center;font-size:.9rem;color:var(--color-text-muted);margin:0}._menuContainer_1qhuh_93{position:relative}._menuDropdown_1qhuh_657{position:absolute;top:100%;right:0;left:auto;margin-top:.5rem;background-color:#fff;border-radius:var(--radius-sm);box-shadow:var(--shadow-md);border:1px solid #e2e8f0;min-width:160px;z-index:1000;overflow:hidden}._menuItem_1qhuh_689{padding:.75rem 1rem;cursor:pointer;color:var(--color-text-main);transition:background-color .2s;font-size:.95rem;border:none;background:none;width:100%;text-align:left;display:block}._menuItem_1qhuh_689:hover{background-color:#f1f5f9}._menuItem_1qhuh_689._delete_1qhuh_723{color:#ef4444}._menuItem_1qhuh_689._delete_1qhuh_723:hover{background-color:#fee2e2}._modeSwitch_1qhuh_739{display:flex;background-color:#f1f5f9;padding:4px;border-radius:var(--radius-md);margin-bottom:1.5rem}._modeBtn_1qhuh_755{flex:1;padding:.5rem;border:none;background:none;border-radius:var(--radius-sm);font-size:.95rem;font-weight:500;color:var(--color-text-muted);cursor:pointer;transition:all .2s}._modeBtn_1qhuh_755._active_1qhuh_781{background-color:#fff;color:var(--color-primary);box-shadow:var(--shadow-sm)}._dashboardContainer_k60x7_1{width:100%;height:100vh;overflow:hidden;display:flex;flex-direction:column}._topBar_k60x7_17{width:100%;background-color:#fff;box-shadow:var(--shadow-sm);display:flex;justify-content:center;flex-shrink:0;z-index:10;position:relative}._headerContent_k60x7_41{width:100%;max-width:600px;padding:1rem;display:flex;flex-direction:column;gap:.5rem}._titleRow_k60x7_59{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;width:100%}._logoContainer_k60x7_73{display:flex;justify-content:flex-start}._logo_k60x7_73{height:45px;width:auto}._titleRow_k60x7_59 h1{font-size:1.25rem;font-weight:700;margin:0;text-align:center;color:#0f172a}._menuContainer_k60x7_109{position:relative;justify-self:end;z-index:1001}._menuBackdrop_k60x7_123{position:fixed;top:0;left:0;width:100vw;height:100vh;background-color:#0003;z-index:990;cursor:default}._menuDropdown_k60x7_145{position:absolute;top:100%;right:0;margin-top:.5rem;background-color:#fff;border-radius:var(--radius-sm);box-shadow:var(--shadow-md);border:1px solid #e2e8f0;min-width:180px;z-index:1000;overflow:hidden}._menuItem_k60x7_173{padding:.75rem 1rem;cursor:pointer;color:var(--color-text-main);transition:background-color .2s;font-size:.95rem;border:none;background:none;width:100%;text-align:left;display:block}._menuItem_k60x7_173:hover{background-color:#f1f5f9}._logout_k60x7_207{color:#ef4444;border-top:1px solid #f1f5f9}._logout_k60x7_207:hover{background-color:#fef2f2}._controlsRow_k60x7_227{display:flex;justify-content:space-between;align-items:center;color:var(--color-text-muted);width:100%}._content_k60x7_243{width:100%;padding:0 0 2rem;box-sizing:border-box;flex:1;overflow-y:auto}._menuIcon_k60x7_267{display:flex;flex-direction:column;gap:4px;cursor:pointer}._bar_k60x7_281{width:24px;height:3px;background-color:var(--color-text-main);border-radius:2px}._sort_k60x7_303 select{background-color:var(--color-bg-input);border:none;padding:.5rem 1rem;border-radius:var(--radius-sm);color:var(--color-text-main);font-weight:500;cursor:pointer}._list_k60x7_323{display:flex;flex-direction:column;gap:1.5rem;width:100%;max-width:600px;margin:2rem auto 0;padding:0 1rem;box-sizing:border-box}._collectionCard_k60x7_345{display:flex;flex-direction:column;gap:1rem;padding:1.5rem}._cardHeader_k60x7_359{display:flex;justify-content:space-between;align-items:flex-start}._titleLink_k60x7_371{text-decoration:none;color:inherit}._titleLink_k60x7_371 h3{margin:0;font-size:1.2rem;color:#1a1a2e}._moreBtn_k60x7_395{background:none;border:none;font-size:1.5rem;color:var(--color-text-muted);cursor:pointer;padding:0;line-height:1}._description_k60x7_415{margin:0;color:var(--color-text-muted);font-size:.95rem;line-height:1.4}._statsRow_k60x7_429{display:flex;gap:1.5rem;font-size:.9rem;color:#555;font-weight:500}._stat_k60x7_429 i{margin-right:.3rem;font-style:normal}._metricsRow_k60x7_455{display:flex;justify-content:space-between;align-items:center;margin-top:.5rem;padding-top:1rem;border-top:1px solid rgba(0,0,0,.05)}._metric_k60x7_455{display:flex;flex-direction:column}._label_k60x7_483{font-size:.8rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.5px}._value_k60x7_497{font-size:1.2rem;font-weight:700}._startBtn_k60x7_507{padding:.6rem 1.5rem;font-size:.95rem;border-radius:var(--radius-sm)}._modalOverlay_k60x7_521{position:fixed;inset:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:100;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}._createCard_k60x7_549{width:90%;max-width:400px}._createCard_k60x7_549 h3{margin-top:0}._createCard_k60x7_549 input,._createCard_k60x7_549 textarea{width:100%;box-sizing:border-box;margin-bottom:1rem;padding:.8rem;border:1px solid #ddd;border-radius:var(--radius-sm);background-color:var(--color-bg-input)}._modalActions_k60x7_589{display:flex;justify-content:flex-end;gap:1rem}._container_zauie_1{display:flex;justify-content:center;align-items:center;height:100vh;background-color:var(--color-bg-main)}._loginContent_zauie_21{display:flex;flex-direction:column;align-items:center;gap:2rem;width:100%}._logo_zauie_37{height:80px;width:auto}._loginCard_zauie_49{width:100%;max-width:400px;padding:2.5rem}._loginCard_zauie_49 h2{text-align:center;margin-bottom:2rem;color:var(--color-text-main)}._formGroup_zauie_73{display:flex;flex-direction:column;margin-bottom:1.5rem}._formGroup_zauie_73 label{margin-bottom:.5rem;color:var(--color-text-muted);font-size:.9rem}._formGroup_zauie_73 input{width:100%;padding:.75rem 1rem;border:1px solid #e2e8f0;border-radius:var(--radius-sm);font-size:1rem;background-color:#f8fafc;transition:all .2s;color:var(--color-text-main)}._formGroup_zauie_73 input:focus{border-color:var(--color-primary);background-color:#fff;outline:none;box-shadow:0 0 0 3px #6366f11a}._error_zauie_135{color:var(--color-error);text-align:center;margin-bottom:1rem}._submitBtn_zauie_147{width:100%}._practiceContainer_ggat5_1{width:100%;min-height:100vh;display:flex;flex-direction:column}._content_ggat5_15{width:100%;max-width:600px;margin:0 auto;padding:0 1rem 2rem;box-sizing:border-box;display:flex;flex-direction:column;flex:1}._header_ggat5_37{width:100%;background-color:#fff;box-shadow:var(--shadow-sm);margin-bottom:2rem;display:flex;justify-content:center}._headerContent_ggat5_55{width:100%;max-width:600px;padding:1rem;display:flex;flex-direction:column;gap:.5rem}._titleRow_ggat5_73{display:grid;grid-template-columns:40px 1fr 40px;align-items:center;width:100%}._menuIcon_ggat5_87{display:flex;flex-direction:column;gap:4px;cursor:pointer}._bar_ggat5_101{width:24px;height:3px;background-color:var(--color-text-main);border-radius:2px}._collectionTitle_ggat5_115{margin:0;font-size:1.25rem;font-weight:700;text-align:center;color:#0f172a}._closeBtn_ggat5_131{font-size:2rem;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background-color:transparent;color:var(--color-text-muted);text-decoration:none;cursor:pointer;transition:color .2s}._closeBtn_ggat5_131:hover{color:var(--color-text-main)}._closeIcon_ggat5_169{line-height:1;font-weight:300}._statsRow_ggat5_179{display:flex;justify-content:center;align-items:center;gap:2rem;padding-bottom:.5rem}._statGroup_ggat5_195{display:flex;flex-direction:column;align-items:center;gap:.2rem}._statLabel_ggat5_209{font-size:.8rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.5px}._statValue_ggat5_223{font-size:1.5rem;font-weight:700;line-height:1.2}._scoreValue_ggat5_235{color:var(--color-primary)}._accuracyValue_ggat5_243{color:var(--color-success)}._statDivider_ggat5_251{width:1px;height:40px;background-color:#e2e8f0}._flashcardContainer_ggat5_263{flex:1;perspective:1000px;cursor:pointer;margin-bottom:2rem;position:relative;display:flex;flex-direction:column}._cardCounter_ggat5_283{text-align:right;margin-bottom:.5rem;color:var(--color-text-muted);font-size:.9rem;font-weight:500}._flashcard_ggat5_263{position:relative;width:100%;flex:1;min-height:400px;text-align:center;transition:transform .6s;transform-style:preserve-3d;background-color:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid rgba(0,0,0,.05)}._flipped_ggat5_327{transform:rotateY(180deg)}._front_ggat5_335,._back_ggat5_337{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:2rem;box-sizing:border-box}._back_ggat5_337{transform:rotateY(180deg)}._character_ggat5_373{font-size:6rem;font-weight:500;color:var(--color-text-main);margin-bottom:2rem}._hint_ggat5_387{font-size:.9rem;color:var(--color-text-muted);opacity:.6}._pinyin_ggat5_399{font-size:2.5rem;color:var(--color-secondary);margin-bottom:1.5rem;font-weight:500}._definition_ggat5_413{font-size:1.5rem;color:var(--color-text-main);line-height:1.4;max-width:80%}._controls_ggat5_427{height:100px;display:flex;justify-content:center;align-items:center;margin-top:auto}._eyeBtn_ggat5_443{background-color:var(--color-primary);color:#fff;border:none;border-radius:50%;width:64px;height:64px;display:flex;justify-content:center;align-items:center;cursor:pointer;transition:transform .2s,background-color .2s;box-shadow:var(--shadow-md)}._eyeBtn_ggat5_443:hover{background-color:hsl(var(--hue-primary),60%,45%);transform:scale(1.05)}._eyeBtn_ggat5_443:active{transform:scale(.95)}._resultBtns_ggat5_491{display:flex;gap:1.5rem;width:100%;max-width:400px}._resultBtns_ggat5_491 button{flex:1;height:56px;font-size:1.1rem}._emptyCard_ggat5_517,._finishCard_ggat5_519{text-align:center;padding:3rem;margin-top:4rem}._finishCard_ggat5_519 h2{color:var(--color-success);margin-bottom:1rem}._finalStats_ggat5_541{display:flex;justify-content:center;gap:3rem;margin:2rem 0}._statItem_ggat5_555{display:flex;flex-direction:column;gap:.5rem}._actions_ggat5_567{display:flex;gap:1rem;justify-content:center;margin-top:2rem}