:root{--navy:#123746;--teal:#137c75;--mint:#e0f1eb;--amber:#f6b64d;--ink:#203e48;--muted:#74868a;--line:#e3eaea;--bg:#f4f7f7}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 "Microsoft YaHei",sans-serif}button,input,select{font:inherit}button{cursor:pointer;border:0}button:disabled{opacity:.48;cursor:default}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--amber);outline-offset:3px}button,input,select{-webkit-tap-highlight-color:transparent}button{touch-action:manipulation}a{color:var(--teal)}.shell{display:flex;min-height:100vh}.sidebar{width:204px;position:fixed;inset:0 auto 0 0;background:white;border-right:1px solid var(--line);padding:26px 18px;display:flex;flex-direction:column}.brand{display:flex;gap:10px;align-items:center;margin-bottom:36px;font-weight:800;font-size:23px;color:var(--navy)}.brand img{width:43px;height:43px;border-radius:10px}.brand small{display:block;font-size:10px;letter-spacing:3px;font-weight:500;color:var(--muted)}.nav{display:flex;flex-direction:column;gap:11px}.nav button{text-align:left;background:none;padding:14px 16px;border-radius:13px;color:#6d8388}.nav button.active{background:var(--mint);color:var(--teal);font-weight:bold}.nav i{display:inline-block;font-style:normal;width:29px}.side-note{margin-top:auto;padding:18px 10px;color:var(--muted);font-size:12px}.side-note b{display:block;color:var(--teal);font-size:14px;margin-bottom:4px}.main{margin-left:204px;padding:27px 38px;width:calc(100% - 204px);max-width:1600px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;font-size:13px;color:var(--muted)}.profile{background:white;border-radius:25px;padding:7px 14px;color:var(--ink);display:flex;gap:10px;align-items:center}.avatar{background:#f8e5bb;width:29px;height:29px;border-radius:50%;display:grid;place-items:center;font-size:14px}.eyebrow{font-size:12px;letter-spacing:2px;font-weight:bold;color:var(--teal)}h1{font-size:29px;margin:8px 0 4px;font-weight:800;letter-spacing:1px}h2{font-size:19px;margin:0 0 15px}h3{font-size:16px;margin:0 0 8px}p{margin:5px 0}.muted{color:var(--muted);font-size:13px}.hero{display:flex;align-items:center;justify-content:space-between;gap:25px;background:var(--navy);border-radius:23px;padding:30px 35px;color:white;margin-top:22px;position:relative;overflow:hidden}.hero:after{content:"";position:absolute;width:300px;height:300px;right:-70px;top:-115px;border:45px solid #24615d;border-radius:50%;opacity:.55;pointer-events:none}.hero .eyebrow{color:#91d2bd}.hero h1{font-size:32px;line-height:1.4;margin:10px 0}.hero p{color:#b9d2d4;font-size:13px}.hero>div{position:relative;z-index:1}.hero .primary{background:var(--amber);color:var(--navy);margin-top:20px;font-weight:800}.hero-art{width:160px;height:160px;border-radius:35px;transform:rotate(-8deg);box-shadow:0 15px 30px #0e293f40}.primary,.secondary,.quiet,.danger{padding:12px 24px;border-radius:11px;min-height:46px;background:var(--teal);color:white;font-weight:600}.secondary{background:var(--mint);color:var(--teal)}.quiet{background:white;color:var(--ink);border:1px solid var(--line)}.danger{background:#fde7e4;color:#ae4e43}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:21px 0}.stat,.panel{background:white;border:1px solid var(--line);border-radius:18px;padding:22px}.stat{display:flex;gap:15px;align-items:center}.stat .symbol{font-size:24px;background:#edf6f3;padding:9px 13px;border-radius:12px}.stat strong{font-size:27px;color:var(--navy)}.stat small{color:var(--muted);font-size:12px;display:block}.columns{display:grid;grid-template-columns:1.1fr 1fr;gap:19px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px}.task{padding:12px 0;border-top:1px solid var(--line);display:flex;gap:12px;align-items:center}.task b{font-size:14px}.task .number{background:var(--mint);color:var(--teal);font-weight:bold;border-radius:9px;padding:7px 11px}.task .quiet{margin-left:auto;font-size:12px;padding:7px 13px;min-height:34px}.pill{display:inline-block;background:var(--mint);color:var(--teal);padding:4px 10px;font-size:11px;border-radius:7px}.pill.amber{background:#fff1d6;color:#97621c}.course-icon{width:52px;height:66px;border-radius:5px 10px 10px 5px;background:#e7f2ed;color:var(--teal);font-size:24px;display:grid;place-items:center;border-left:5px solid var(--teal)}.filters{display:flex;gap:12px;margin:21px 0;flex-wrap:wrap}select,input{border:1px solid #d7e3e2;background:white;padding:11px 14px;border-radius:10px;color:var(--ink);max-width:100%}.books{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.book{background:white;border:1px solid var(--line);border-radius:17px;padding:22px;text-align:left;transition:.2s}.book.selected{border-color:var(--teal);box-shadow:0 0 0 1px var(--teal)}.book .course-icon{margin:0 0 15px}.book .pill{margin-top:10px}.units{margin-top:20px}.unit{display:flex;gap:15px;align-items:center;padding:18px 0;border-top:1px solid var(--line)}.unit .primary{margin-left:auto;font-size:13px}.empty{text-align:center;padding:45px 20px;color:var(--muted)}.empty .big{font-size:48px;color:var(--teal)}.review-list{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;margin-top:20px}.review-item{background:white;border-radius:14px;border:1px solid var(--line);padding:17px;display:flex;align-items:center;justify-content:space-between}.form{max-width:720px}.form label{display:block;margin:18px 0 7px;font-size:14px;font-weight:bold}.form input{width:100%}.form .actions{display:flex;gap:12px;margin-top:20px;flex-wrap:wrap}.notice{padding:14px 17px;background:#f2f7f6;border-radius:11px;margin:16px 0;font-size:13px;color:#607e80}.binding{font-size:31px;letter-spacing:7px;font-weight:bold;color:var(--teal);margin:14px 0}.study{max-width:1030px;margin:0 auto;padding:23px 36px}.study-header{display:flex;align-items:center;gap:25px;margin-bottom:25px}.progress{height:8px;background:#e0e9e7;border-radius:9px;flex:1;overflow:hidden}.progress span{display:block;height:100%;background:var(--teal);border-radius:9px}.question{background:white;border-radius:24px;border:1px solid var(--line);padding:28px;text-align:center;min-height:370px}.word{font-family:Arial,sans-serif;font-size:54px;color:var(--navy);font-weight:bold;letter-spacing:1px;margin:13px 0}.translation{font-size:29px;margin:25px 0 15px}.sentence{font-size:15px;color:var(--muted);margin:11px 0 24px}.audio{background:var(--mint);color:var(--teal);border-radius:50%;width:65px;height:65px;font-size:27px;margin:12px}.options{display:grid;grid-template-columns:1fr 1fr;gap:13px;max-width:700px;margin:20px auto}.option{padding:19px;border:1px solid var(--line);background:#f9fbfb;border-radius:12px;color:var(--ink);font-size:17px}.option.correct{border-color:var(--teal);background:var(--mint);color:var(--teal)}.option.wrong{border-color:#c96a5d;background:#fff0ec;color:#b85045}.feedback{min-height:48px;display:flex;justify-content:center;align-items:center;gap:20px;margin-top:16px}.good{color:var(--teal)}.bad{color:#b85045}.spell{font:30px Arial;letter-spacing:4px;text-align:center;width:460px;max-width:100%;background:#f8fbfa}.keys{margin:20px auto 10px;max-width:700px}.key-row{display:flex;gap:7px;justify-content:center;margin-top:7px}.key{background:white;border:1px solid #d4dfde;box-shadow:0 2px 0 #d4dfde;border-radius:8px;min-width:44px;height:44px;color:var(--navy);font:20px Arial}.key.wide{min-width:86px;font:14px "Microsoft YaHei"}.reading-actions{display:flex;justify-content:center;gap:14px;margin:20px}.result{max-width:650px;margin:55px auto;text-align:center}.result .success{font-size:60px;color:var(--teal)}.bar-chart{height:120px;display:flex;align-items:flex-end;gap:13px;margin-top:20px}.bar-wrap{display:flex;flex:1;flex-direction:column;align-items:center;justify-content:flex-end;height:100%;font-size:11px;color:var(--muted)}.bar{width:70%;max-width:50px;border-radius:6px 6px 0 0;background:#9acabd;min-height:3px}.history{width:100%;border-collapse:collapse;font-size:13px}.history td,.history th{padding:11px 7px;text-align:left;border-bottom:1px solid var(--line)}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#183c42;color:white;border-radius:11px;padding:12px 22px;display:none;z-index:10;max-width:85%;font-size:14px}.loading{padding:15vh 20px;text-align:center}.spacer{height:20px}@media(max-width:950px){.sidebar{width:170px;padding:22px 12px}.brand{font-size:20px}.brand img{width:35px;height:35px}.main{margin-left:170px;width:calc(100% - 170px);padding:22px}.hero{padding:25px}.hero h1{font-size:28px}.books{grid-template-columns:1fr 1fr}.hero-art{width:115px;height:115px}.stat{padding:17px;gap:9px}.stat strong{font-size:23px}}@media(max-width:650px){.sidebar{width:70px;padding:18px 7px}.brand{justify-content:center}.brand>span,.nav .label,.side-note{display:none}.brand img{width:42px;height:42px}.nav button{padding:13px;text-align:center}.nav i{width:auto}.main{margin-left:70px;width:calc(100% - 70px);padding:18px 14px}.hero-art{display:none}.hero h1{font-size:25px}.hero{padding:24px}.columns,.books{grid-template-columns:1fr}.stats{gap:8px}.stat{padding:13px 8px;display:block}.stat .symbol{display:none}.stat strong{font-size:22px}.study{padding:18px 12px}.question{padding:20px 14px}.word{font-size:42px}.options{gap:8px}.option{padding:16px 10px}.key{min-width:27px;height:40px;font-size:17px}.key-row{gap:4px}.review-list{grid-template-columns:1fr}.reading-actions{flex-wrap:wrap}}
:is(.row,.unit)>.secondary{flex-shrink:0;white-space:nowrap}.history td:nth-child(2),.history th:nth-child(2){white-space:nowrap}@media(max-width:650px){body>main>.brand>span{display:block}body>main>.brand{justify-content:flex-start}body>main .row h1{font-size:26px}}
.daily-plan{margin-bottom:20px}.daily-plan h2{margin:5px 0}.task-chips{display:flex;gap:10px;flex-wrap:wrap;margin:15px 0}.task-chips .pill{font-size:13px;padding:8px 12px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.practice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin:20px 0}.practice-card{text-align:left;background:#f2f8f6;border:1px solid var(--line);border-radius:13px;padding:20px;color:var(--teal)}.practice-card b{display:block;font-size:22px;margin-bottom:6px}.practice-card span{font-size:12px;color:var(--muted)}.skill-progress{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}.skill-progress .row{font-size:13px;margin-bottom:8px}.skill-progress small{font-size:11px;color:var(--muted)}.check-options{display:flex;gap:12px;flex-wrap:wrap}.check-options label{display:flex;gap:7px;align-items:center;margin:0;padding:8px 12px;border:1px solid var(--line);border-radius:8px}.check-options input{width:auto;accent-color:var(--teal)}.word-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin-top:15px}.word-note h2{font:700 25px Arial;margin-bottom:6px}.word-note .sentence{min-height:36px;color:#4c6e75}.word-note .quiet{min-height:36px;padding:7px 13px;font-size:13px}.answer-review{text-align:left;margin:25px 0}.answer-review article{padding:18px 0;border-top:1px solid var(--line)}.answer-review p{font-size:14px}.assessment-result{max-width:850px}.test-score{font-size:65px;color:var(--teal);font-weight:bold;margin:15px}.test-score small{font-size:19px;margin-left:8px}.chart-scroll,.table-scroll{overflow-x:auto}.month-chart{min-width:1000px}.course-summary{border-top:1px solid var(--line);padding-top:20px;margin-top:20px}.nav{gap:6px}.nav button{padding-top:11px;padding-bottom:11px}.sidebar .side-note{padding-top:12px}.sidebar{overflow-y:auto}
@media(max-width:950px){.practice-grid{grid-template-columns:repeat(2,1fr)}.skill-progress{grid-template-columns:repeat(2,1fr)}}@media(max-width:650px){.word-grid{grid-template-columns:1fr}.task-chips{gap:6px}.task-chips .pill{font-size:11px}.skill-progress{gap:12px}.practice-card{padding:16px}.form select{width:100%}.row{flex-wrap:wrap}.study-header{gap:12px;font-size:13px}.question .translation{margin-top:18px}.assessment-result{margin:20px 12px}.word{overflow-wrap:anywhere}}

.auth-layout{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:24px;margin:28px 0}.auth-layout h2{margin-top:20px}.auth-intro{background:#e4f1ec;align-self:start;padding:34px}.auth-intro h2{font-size:28px}.account-summary{background:#f2f7f5;border-radius:12px;padding:16px;margin-top:18px;overflow-wrap:anywhere}.account-summary p{margin:7px 0}.danger{background:#a63535;color:white;border-radius:9px;padding:12px 20px}.form input[readonly]{background:#edf1f0;color:#6b7b78}.form input[type=password]{font-family:inherit}.family-action{margin-top:20px}@media(max-width:650px){.auth-layout{grid-template-columns:1fr;gap:16px;margin:20px 0}.auth-intro{padding:24px}.auth-intro h2{font-size:24px}.auth-layout .panel{padding:22px}.auth-layout h1{font-size:27px}}

.form textarea{font:inherit;display:block;width:100%;padding:12px;border:1px solid var(--line);border-radius:9px;margin:8px 0 18px;resize:vertical}#app-update-card{margin:20px;position:relative;z-index:2}.sidebar .nav button{padding-top:9px;padding-bottom:9px}

#app-update-card{position:fixed;top:70px;left:50%;transform:translateX(-50%);width:calc(100% - 40px);max-width:560px;z-index:20;box-shadow:0 12px 70px #12374655;margin:0}#app-update-card button{margin-right:12px}
/* Entry and administrator-owned learning profiles. */
.login-space{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:#f3f7f7}.login-card{width:min(560px,100%);padding:30px}.login-logo{width:74px;height:74px;object-fit:contain;margin-bottom:12px}.profile-books{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:9px;margin:14px 0}.profile-book{display:flex!important;align-items:center;gap:8px;margin:0!important;font-weight:400!important}.profile-book input{width:18px!important;min-height:18px!important;flex:0 0 18px}.login-card .actions{flex-wrap:wrap}