@font-face{font-family:Montserrat Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/montserrat-cyrillic-ext-wght-normal-CO5hGrJv.woff2)format("woff2-variations");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Montserrat Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/montserrat-cyrillic-wght-normal-EAA9jha_.woff2)format("woff2-variations");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Montserrat Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/montserrat-vietnamese-wght-normal-k7S-YeeD.woff2)format("woff2-variations");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Montserrat Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/montserrat-latin-ext-wght-normal-BsZE-iaG.woff2)format("woff2-variations");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Montserrat Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/assets/montserrat-latin-wght-normal-l_AIctKy.woff2)format("woff2-variations");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Courier Prime;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/courier-prime-latin-ext-400-normal-B-EsvyE4.woff2)format("woff2"),url(/assets/courier-prime-latin-ext-400-normal-CKOCNFvK.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Courier Prime;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/courier-prime-latin-400-normal-BbyBr73r.woff2)format("woff2"),url(/assets/courier-prime-latin-400-normal-BAlbUm6l.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Courier Prime;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/courier-prime-latin-ext-700-normal-ByMJlNdM.woff2)format("woff2"),url(/assets/courier-prime-latin-ext-700-normal-BIFoAzHx.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Courier Prime;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/courier-prime-latin-700-normal-D1YCjmaD.woff2)format("woff2"),url(/assets/courier-prime-latin-700-normal-CVvp4Sof.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}._shell_13dj8_1{grid-template-rows:var(--titlebar-h) minmax(0, 1fr);height:100dvh;display:grid}._body_13dj8_7{grid-template-columns:var(--sidebar-w) minmax(0, 1fr);min-height:0;display:grid;position:relative}._main_13dj8_14{min-width:0;min-height:0;overflow:auto}@media (width<=900px){._body_13dj8_7{grid-template-columns:minmax(0,1fr)}}@media print{._shell_13dj8_1{height:auto;display:block}._shell_13dj8_1>header,._body_13dj8_7>nav{display:none}._body_13dj8_7{display:block}._main_13dj8_14{background:0 0;overflow:visible}._main_13dj8_14.dot-grid{background-image:none}}._titleBar_uy4py_1{border-bottom:1px solid var(--line-strong);background:var(--bg);grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:12px;padding:0 14px;display:grid}._left_uy4py_11{align-items:center;gap:4px;display:flex}._backButton_uy4py_17{border-radius:var(--radius-s);align-items:center;gap:6px;height:36px;margin-left:-6px;padding:0 10px 0 6px;font-size:14px;font-weight:600;transition:background .15s;display:inline-flex}._backButton_uy4py_17:hover{background:var(--hover)}._right_uy4py_34{justify-self:end;align-items:center;gap:8px;display:flex}._sheetLink_uy4py_41{border:1px solid var(--line-strong);border-radius:var(--radius-s);white-space:nowrap;align-items:center;gap:8px;height:32px;padding:0 12px;font-size:13px;font-weight:600;transition:background .15s,border-color .15s;display:inline-flex}._sheetLink_uy4py_41:hover{background:var(--hover)}._sheetLink_uy4py_41.active{background:var(--selected-bg);box-shadow:var(--selected-shadow);border-color:#0000}._themeButton_uy4py_67{border-radius:var(--radius-s);place-items:center;width:40px;height:40px;margin-right:-8px;transition:background .15s;display:grid}._themeButton_uy4py_67:hover{background:var(--hover)}._menuButton_uy4py_81{border-radius:var(--radius-s);place-items:center;width:40px;height:40px;margin-left:-8px;display:none}._title_uy4py_1{white-space:nowrap;align-items:baseline;gap:8px;min-width:0;font-size:15px;font-weight:500;display:flex}._siteName_uy4py_100{padding:10px 0;display:inline-block}._siteName_uy4py_100:hover{text-underline-offset:3px;text-decoration:underline}._separator_uy4py_111{color:var(--text-muted)}._topicTitle_uy4py_115{text-overflow:ellipsis;min-width:0;overflow:hidden}@media (width<=900px){._menuButton_uy4py_81{display:grid}._backButton_uy4py_17{margin-left:0}}@media (width<=560px){._titleBar_uy4py_1{grid-template-columns:auto minmax(0,1fr) auto}._title_uy4py_1{justify-content:center;overflow:hidden}._withPage_uy4py_146 ._siteName_uy4py_100,._withPage_uy4py_146 ._separator_uy4py_111{display:none}._sheetLink_uy4py_41{justify-content:center;width:36px;padding:0}._sheetLabel_uy4py_157,._backLabel_uy4py_158{display:none}._backButton_uy4py_17{justify-content:center;width:40px;height:40px;margin-left:0;padding:0}}._sidebar_140ri_1{border-right:1px solid var(--line);background:var(--bg-sunken);flex-direction:column;gap:18px;min-height:0;padding:16px 12px 24px;display:flex;overflow-y:auto}._progress_140ri_13{gap:8px;padding:4px 10px 6px;display:grid}._progressLabel_140ri_19{letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);justify-content:space-between;gap:8px;font-size:12px;font-weight:600;display:flex}._progressLabel_140ri_19 span:last-child{text-transform:none;letter-spacing:0;font-variant-numeric:tabular-nums}._progressBar_140ri_36{background:var(--line-strong);border-radius:3px;height:6px;overflow:hidden}._practice_140ri_43{color:var(--text-muted);font-variant-numeric:tabular-nums;flex-wrap:wrap;justify-content:space-between;gap:4px 8px;font-size:12px;display:flex}._review_140ri_53{color:var(--c-blue);font-weight:600}._review_140ri_53:hover,._review_140ri_53[aria-current=page]{text-decoration:underline}._progressFill_140ri_63{background:var(--c-green);height:100%;box-shadow:0 0 8px var(--c-green);border-radius:3px;transition:width .4s}._home_140ri_71,._item_140ri_72{border-radius:var(--radius-s);min-height:36px;color:var(--text-muted);align-items:center;gap:10px;padding:0 10px;font-size:14px;font-weight:500;transition:background .15s,color .15s;display:flex}._home_140ri_71:hover,._item_140ri_72:hover{background:var(--hover);color:var(--text)}._home_140ri_71.active,._item_140ri_72.active{background:var(--selected-bg);color:var(--text);box-shadow:var(--selected-shadow)}._item_140ri_72.active{border-left:3px solid var(--accent);padding-left:7px}._item_140ri_72.active ._number_140ri_106{color:var(--accent)}._doneMark_140ri_111{color:var(--c-green);flex:none;margin-left:auto}._item_140ri_72.active:has(._doneMark_140ri_111):after{margin-left:0}._item_140ri_72.active:after{content:"";background:var(--c-green);width:10px;height:10px;box-shadow:0 0 8px var(--c-green);border-radius:50%;flex:none;margin-left:auto}._groupTitle_140ri_134{letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);align-items:center;gap:8px;padding:0 10px 6px;font-size:11px;font-weight:700;display:flex}._groupTitle_140ri_134:before{content:"";background:var(--accent);border-radius:50%;width:8px;height:8px}._number_140ri_106{font-variant-numeric:tabular-nums;color:var(--text-muted);font-size:12px;font-weight:600}._backdrop_140ri_161{display:none}@media (width<=900px){._sidebar_140ri_1{z-index:20;width:min(var(--sidebar-w), 86vw);visibility:hidden;transition:transform .2s,visibility .2s;position:absolute;inset:0 auto 0 0;transform:translate(-100%)}._open_140ri_178{visibility:visible;transform:none}._backdrop_140ri_161{z-index:10;background:#0a0c1099;display:block;position:absolute;inset:0}._home_140ri_71,._item_140ri_72{min-height:44px}}@media (prefers-reduced-motion:reduce){._sidebar_140ri_1,._progressFill_140ri_63{transition:none}}._page_l6vzx_1{gap:40px;max-width:1120px;margin:0 auto;padding:48px 24px 72px;display:grid}._header_l6vzx_9{gap:8px;display:grid}._title_l6vzx_14{letter-spacing:-.01em;font-size:clamp(32px,5vw,46px);font-weight:700;line-height:1.1}._tagline_l6vzx_21{color:var(--text-muted);text-wrap:balance;font-size:18px}._count_l6vzx_27{letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin-top:6px;font-size:12px;font-weight:600}._intro_l6vzx_36{text-wrap:pretty;max-width:60ch;margin-top:10px;font-size:16px}._actions_l6vzx_43{flex-wrap:wrap;gap:12px;margin-top:10px;display:flex}._primary_l6vzx_50,._secondary_l6vzx_51{border-radius:22px;align-items:center;min-height:44px;padding:0 20px;font-weight:600;display:inline-flex}._primary_l6vzx_50{background:var(--btn-bg);color:var(--btn-text)}._primary_l6vzx_50:hover{background:var(--btn-bg-hover)}._secondary_l6vzx_51{border:1px solid var(--line-strong)}._secondary_l6vzx_51:hover{background:var(--hover)}._group_l6vzx_77{gap:14px;display:grid}._groupTitle_l6vzx_82{letter-spacing:.08em;text-transform:uppercase;align-items:center;gap:10px;font-size:13px;font-weight:700;display:flex}._groupTitle_l6vzx_82:before{content:"";background:var(--accent);width:10px;height:10px;box-shadow:0 0 10px var(--accent);border-radius:50%}._grid_l6vzx_101{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;display:grid}._grid_l6vzx_101>li{display:grid}._card_l6vzx_111{border:1px solid var(--line);border-radius:var(--radius-m);background:var(--bg-raised);box-shadow:var(--shadow-card);flex-direction:column;gap:8px;padding:16px;transition:border-color .2s,box-shadow .2s,transform .2s;display:flex}._card_l6vzx_111:hover{border-color:var(--accent);box-shadow:0 0 22px color-mix(in srgb, var(--accent) 28%, transparent);transform:translateY(-2px)}._cardTop_l6vzx_132{justify-content:space-between;align-items:flex-start;display:flex}._icon_l6vzx_138{border:1px solid var(--node-border);background:var(--node-bg);border-radius:12px;place-items:center;width:48px;height:48px;transition:background .2s,border-color .2s;display:grid}._card_l6vzx_111:hover ._icon_l6vzx_138{background:var(--accent);border-color:var(--accent)}._number_l6vzx_156{font-variant-numeric:tabular-nums;color:var(--text-muted);font-size:13px;font-weight:600}._cardTitle_l6vzx_163{margin-top:4px;font-size:17px;font-weight:700}._cardSummary_l6vzx_169{color:var(--text-muted);text-wrap:pretty;font-size:13.5px}._status_l6vzx_175{color:var(--c-green);align-items:center;gap:7px;margin-top:auto;padding-top:8px;font-size:12px;font-weight:600;display:inline-flex}._status_l6vzx_175:before{content:"";border:1px solid var(--c-green);background:var(--c-green);width:7px;height:7px;box-shadow:0 0 8px var(--c-green);border-radius:50%}@media (width<=600px){._page_l6vzx_1{padding:32px 16px 56px}}@media (prefers-reduced-motion:reduce){._card_l6vzx_111{transition:none}._card_l6vzx_111:hover{transform:none}}._page_hqph9_1{text-align:center;place-content:center;justify-items:center;gap:12px;min-height:100%;padding:48px 24px;display:grid}._title_hqph9_11{text-wrap:balance;font-size:28px;font-weight:700}._text_hqph9_17{color:var(--text-muted);text-wrap:pretty}._link_hqph9_22{background:var(--btn-bg);min-height:44px;color:var(--btn-text);border-radius:22px;align-items:center;margin-top:8px;padding:0 20px;font-weight:600;display:inline-flex}._link_hqph9_22:hover{background:var(--btn-bg-hover)}._page_d6maz_1{gap:36px;max-width:820px;margin:0 auto;padding:48px 24px 72px;display:grid}._header_d6maz_9{gap:12px;display:grid}._title_d6maz_14{letter-spacing:-.01em;text-wrap:balance;font-size:clamp(30px,5vw,42px);font-weight:700;line-height:1.1}._lead_d6maz_22{color:var(--text-muted);text-wrap:pretty;font-size:17px}._group_d6maz_28{gap:14px;display:grid}._groupTitle_d6maz_33{letter-spacing:.08em;text-transform:uppercase;align-items:center;gap:10px;font-size:13px;font-weight:700;display:flex}._groupTitle_d6maz_33:before{content:"";background:var(--accent);width:10px;height:10px;box-shadow:0 0 10px var(--accent);border-radius:50%}._steps_d6maz_53{margin-left:4px;display:grid}._step_d6maz_53{grid-template-columns:44px minmax(0,1fr);gap:16px;padding-bottom:22px;display:grid;position:relative}._step_d6maz_53:before{content:"";border-left:2px dotted var(--accent);opacity:.6;position:absolute;top:44px;bottom:0;left:21px}._step_d6maz_53:last-child{padding-bottom:0}._step_d6maz_53:last-child:before{display:none}._number_d6maz_84{border:1.5px solid var(--accent);background:var(--node-bg);font-variant-numeric:tabular-nums;border-radius:12px;place-items:center;width:44px;height:44px;font-size:14px;font-weight:700;display:grid}._body_d6maz_97{gap:4px;padding-top:2px;display:grid}._stepTitle_d6maz_103{font-size:18px;font-weight:700}@media (pointer:coarse){._stepTitle_d6maz_103 a{margin:-6px 0;padding:6px 0;display:inline-block}}._stepTitle_d6maz_103 a:hover{text-underline-offset:3px;text-decoration:underline}._problem_d6maz_122{color:var(--text-muted);text-wrap:pretty}._answer_d6maz_127{text-wrap:pretty}._actions_d6maz_131{flex-wrap:wrap;gap:12px;display:flex}._primary_d6maz_137,._secondary_d6maz_138{border-radius:22px;align-items:center;min-height:44px;padding:0 20px;font-weight:600;display:inline-flex}._primary_d6maz_137{background:var(--btn-bg);color:var(--btn-text)}._primary_d6maz_137:hover{background:var(--btn-bg-hover)}._secondary_d6maz_138{border:1px solid var(--line-strong)}._secondary_d6maz_138:hover{background:var(--hover)}@media (width<=600px){._page_d6maz_1{padding:32px 16px 56px}}:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--bg:#1e232d;--bg-raised:#262c38;--bg-sunken:#1a1e27;--line:#ffffff1f;--line-strong:#ffffff3d;--grid-dot:#ffffff12;--hover:#ffffff0f;--pressed:#3a404c;--selected-bg:var(--pressed);--selected-shadow:none;--shadow-card:none;--btn-bg:#fff;--btn-bg-hover:#e6e9ef;--btn-text:#1e232d;--text:#f4f6fa;--text-muted:#9ba4b6;--text-on-light:#1e232d;--on-accent:#fff;--node-bg:#2b3039;--node-border:#ffffff29;--link-idle:#9097a3;--pill-bg:#fff;--pill-text:#1e232d;--beam-color:var(--text);--c-blue:#3d8ff0;--c-purple:#a35cf0;--c-teal:#68cdb0;--c-red:#e5506b;--c-yellow:#f2c343;--c-orange:#f08a4b;--c-green:#6fd672;--c-grey:#8e949e;--c-hacker:#ee3a31;--font-ui:"Montserrat Variable", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono:"Courier Prime", ui-monospace, Menlo, Consolas, monospace;--glide:.9s;--radius-s:8px;--radius-m:14px;--radius-l:20px;--titlebar-h:44px;--sidebar-w:272px}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f5f7fa;--bg-raised:#fff;--bg-sunken:#edf0f4;--line:#10182817;--line-strong:#10182829;--grid-dot:#10182821;--hover:#1018280b;--pressed:#e4e8ef;--selected-bg:#fff;--selected-shadow:0 1px 2px #1018281a, 0 0 0 1px #1018280f;--shadow-card:0 1px 2px #1018280a, 0 2px 8px #1018280f;--btn-bg:#2b74e0;--btn-bg-hover:#1f63c8;--btn-text:#fff;--text:#182030;--text-muted:#5a6474;--node-bg:#fff;--node-border:#1018282e;--link-idle:#a3aab5;--pill-bg:#fff;--pill-text:#182030;--beam-color:var(--c-hacker);--c-blue:#2b74e0;--c-purple:#8b47dc;--c-teal:#1f9e84;--c-red:#d63a57;--c-yellow:#e3a008;--c-orange:#e06c25;--c-green:#2f9e44;--c-grey:#6b7380}*,:before,:after{box-sizing:border-box}html,body,#root{height:100%}body{background:var(--bg);color:var(--text);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;margin:0;font-size:15px;line-height:1.5;overflow:hidden}h1,h2,h3,p,ul,ol{margin:0}ul,ol{padding:0;list-style:none}a{color:inherit;text-decoration:none}button,select{font:inherit;color:inherit}button,a,select{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{cursor:pointer;background:0 0;border:0;padding:0}button:disabled{cursor:default}:focus-visible{outline:2px solid var(--c-blue);outline-offset:2px}.dot-grid{background-color:var(--bg);background-image:radial-gradient(var(--grid-dot) 1.2px, transparent 1.6px);background-size:28px 28px}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;margin:-1px;position:absolute;overflow:hidden}