@layer theme{:root,:host{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color 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monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.relative{position:relative}.block{display:block}.table{display:table}}:root{--bg:#f6f7f9;--paper:#fff;--ink:#24312e;--muted:#76807d;--line:#e7eae7;--accent:#8d283a;--accent-light:#faedf0;--green:#36765a;--radius:18px;--font-sans:Arial, "PingFang TC", "Microsoft JhengHei", sans-serif}*{box-sizing:border-box}body{background:var(--bg);color:var(--ink);font-family:var(--font-sans);margin:0;font-size:16px;line-height:1.6}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer;font:inherit}button:disabled{cursor:wait;opacity:.55}a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline-offset:3px;outline:3px 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var(--line);border-radius:var(--radius);background:#fff;padding:24px}.section-title{justify-content:space-between;align-items:center;gap:12px;margin:30px 0 16px;display:flex}.section-title a{color:var(--muted);font-size:14px}.section-title h2{font-size:20px}.brand{letter-spacing:-.8px;align-items:center;gap:11px;font-size:23px;font-weight:750;line-height:1.1;display:flex}.brand small{letter-spacing:4px;color:var(--muted);margin-top:6px;font-size:12px;font-weight:500;display:block}.brand-mark{color:#fff;background:var(--accent);border-radius:12px 12px 12px 3px;place-items:center;width:42px;height:46px;font-size:25px;font-weight:600;display:grid}.login-page{grid-template-columns:1fr 1fr;min-height:100vh;display:grid}.login-story{color:#fff;background:#76263a;flex-direction:column;justify-content:space-between;min-height:100vh;padding:48px 60px;display:flex;position:relative;overflow:hidden}.login-story:after{content:"";pointer-events:none;border:1px solid #ffffff15;border-radius:50%;width:450px;height:450px;position:absolute;top:20%;right:-250px;box-shadow:0 0 0 60px #ffffff04,0 0 0 120px #ffffff04}.login-story .brand-mark{background:#ffffff20}.login-story .brand small{color:#e5b9c3}.login-story .brand:hover{color:#fff}.login-copy{max-width:450px;padding:70px 0}.login-copy h1{letter-spacing:2px;margin:24px 0;font-size:clamp(36px,3.5vw,58px);font-weight:600;line-height:1.5}.login-copy p{color:#e3c0ca;font-size:18px;line-height:1.9}.light{color:#dbaebb;font-size:11px}.sample-phrase{background:#ffffff08;border:1px solid #ffffff25;border-radius:14px;flex-direction:column;gap:5px;margin-top:38px;padding:22px 50px 22px 24px;display:flex;position:relative}.sample-phrase>span:first-child{font-size:23px}.sample-phrase .jyutping{color:#e4b7c4;font-size:14px}.sample-phrase .small{color:#dbb9c4}.sample-phrase svg{position:absolute;top:28px;right:22px}.login-footer{color:#d4a7b5;justify-content:space-between;font-size:12px;display:flex}.login-panel{background:#fff;justify-content:center;align-items:center;padding:45px;display:flex}.login-form{width:100%;max-width:380px}.login-form h2{margin:15px 0 8px;font-size:32px}.login-form>.muted{margin-bottom:32px}.login-note{color:var(--muted);justify-content:center;align-items:center;gap:8px;margin-top:40px;font-size:12px;display:flex}label{flex-direction:column;gap:8px;font-size:14px;font-weight:550;display:flex}input,select,textarea{font:inherit;color:var(--ink);background:#fff;border:1px solid #dfe4df;border-radius:9px;width:100%;min-height:44px;padding:11px 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0;font-size:14px;display:inline-flex}.demo-entry>.text-button{margin-top:10px;font-size:12px}.app-shell{min-height:100vh;padding-left:244px}.sidebar{border-right:1px solid var(--line);z-index:30;background:#fff;flex-direction:column;width:244px;padding:30px 19px 18px;display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar .brand{margin:4px 9px 40px}.nav-caption{color:#929993;letter-spacing:1.5px;margin:25px 0 10px;padding:0 15px;font-size:11px}.nav-item{color:#6b756f;border-radius:10px;align-items:center;gap:12px;min-height:46px;margin:3px 0;padding:12px 16px;font-size:14px;display:flex}.nav-item.active{color:var(--accent);background:#f9edf0;font-weight:650}.nav-item:not(.active):hover{background:#f4f6f3}.nav-item span{flex:1}.sidebar-bottom{margin-top:auto}.sidebar-note{color:#778071;background:#f5f7f3;border-radius:12px;margin:25px 5px;padding:17px;font-size:13px}.sidebar-note strong{color:#445b42;margin:7px 0 5px;font-size:14px;display:block}.sidebar-user{border-top:1px solid var(--line);align-items:center;gap:10px;padding:16px 5px 0;display:flex}.avatar{color:#93674a;background:#f4e8dd;border-radius:50%;flex-shrink:0;place-items:center;width:36px;height:36px;font-size:15px;font-weight:600;display:grid}.sidebar-user>div:nth-child(2){flex:1;font-size:13px}.sidebar-user small{color:var(--muted);font-size:11px;display:block}.sidebar-user button{color:var(--muted);background:0 0;border:0;padding:8px}.topbar{border-bottom:1px solid var(--line);background:#ffffffc9;justify-content:space-between;align-items:center;gap:15px;height:76px;padding:0 38px;display:flex}.breadcrumb{color:var(--muted);align-items:center;gap:10px;font-size:14px;display:flex}.breadcrumb strong{color:#49574f;font-weight:500}.top-actions{align-items:center;gap:17px;font-size:13px;display:flex}.top-actions button{color:#67746b;background:0 0;border:0;align-items:center;gap:6px;padding:7px;font-size:13px;display:flex}.top-actions 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6px;display:flex}.week-days>div{text-align:center;color:#91998e;font-size:11px}.day-circle{color:#a5ada0;background:#f2f4ef;border-radius:50%;place-items:center;width:26px;height:26px;margin-top:7px;display:grid}.day-circle.done{color:#5b8051;background:#e8f0e3}.day-circle.today{outline-offset:3px;outline:1px solid #819b70}.skill-row{margin-top:19px}.skill-row>.between{margin-bottom:7px;font-size:13px}.progress-bar{background:#f0f2ed;border-radius:9px;height:5px;overflow:hidden}.progress-bar>span{background:#9aab89;border-radius:9px;height:100%;display:block}.skill-note{color:var(--muted);border-top:1px solid var(--line);margin-top:17px;padding-top:17px;font-size:12px}.quick-grid{grid-template-columns:1fr 1fr;gap:15px;display:grid}.quick-card{border:1px solid var(--line);background:#fff;border-radius:13px;align-items:center;gap:13px;padding:20px;display:flex}.quick-card h3{font-size:15px}.quick-card p{color:var(--muted);margin-top:4px;font-size:12px}.quick-card>div:nth-child(2){flex:1}.icon-tile{color:#9a79ae;background:#f3edf8;border-radius:11px;flex-shrink:0;place-items:center;width:43px;height:43px;display:grid}.homework-item{border-top:1px solid var(--line);gap:12px;margin-top:17px;padding-top:16px;display:flex}.homework-item strong{font-size:13px;display:block}.homework-item p{color:var(--muted);margin-top:4px;font-size:12px}.app-footer{border-top:1px solid var(--line);color:#929b94;justify-content:space-between;margin-top:35px;padding-top:20px;font-size:11px;display:flex}.tabs-row{border-bottom:1px solid var(--line);gap:6px;margin-bottom:25px;display:flex;overflow:auto}.tabs-row button,.tabs-row a{white-space:nowrap;color:var(--muted);background:0 0;border:none;border-bottom:2px solid #0000;padding:12px 18px;font-size:14px}.tabs-row 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.translation{color:var(--muted);margin-top:5px;font-size:14px}.dialogue-turn>.icon-button{flex-shrink:0;margin-left:auto}.vocab-list{grid-template-columns:1fr 1fr;gap:14px;margin-top:20px;display:grid}.vocab-item{border:1px solid var(--line);border-radius:10px;padding:15px}.vocab-item strong{font-size:19px}.vocab-item p{color:var(--muted);font-size:13px}.grammar-item{border-bottom:1px solid var(--line);padding:20px 0}.grammar-item p{color:#778177;margin-top:8px;font-size:14px;line-height:1.9}.quiz-question{border-bottom:1px solid var(--line);padding:22px 0}.quiz-question h3{margin-bottom:14px;font-size:16px}.option{border:1px solid var(--line);text-align:left;background:#fff;border-radius:10px;align-items:center;gap:12px;width:100%;margin-top:9px;padding:13px 15px;font-size:14px;display:flex}.option.selected{background:#fcf3f5;border-color:#9b4e5e}.option.correct{background:#eff7ed;border-color:#82ab89}.option .option-index{border:1px solid 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