@import"https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800;900&display=swap";:root{font-family:Nunito,system-ui,sans-serif;color:#26324b;background:#f5f8ff;font-synthesis:none;text-rendering:optimizeLegibility}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #9eb8ff;outline-offset:2px}.login-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:#eef5ff;align-items:center;padding:5vw;gap:4vw}.login-art{min-height:480px;border-radius:34px;background:linear-gradient(145deg,#d8e8ff,#c8f3e7);position:relative;display:grid;place-items:center;overflow:hidden}.hero-mascot{font-size:clamp(120px,18vw,240px);filter:drop-shadow(0 18px 8px #7b9bc433);animation:bob 3s ease-in-out infinite}.floating{position:absolute;font-size:60px;color:#ffbd4a}.star-one{top:12%;left:16%}.star-two{bottom:15%;right:15%;color:#7e8cff}.math-bubble{position:absolute;background:#fff;border-radius:18px;padding:14px 18px;font-size:20px;font-weight:900;box-shadow:0 12px 30px #5c75a51a}.bubble-one{top:20%;right:10%;transform:rotate(6deg)}.bubble-two{bottom:19%;left:8%;transform:rotate(-5deg)}@keyframes bob{50%{transform:translateY(-10px)}}.login-card{width:100%;max-width:440px;justify-self:center;background:#fff;padding:38px;border-radius:28px;box-shadow:0 18px 60px #2c4b7912}.brand-mark{width:48px;height:48px;border-radius:16px;background:#5e75f5;color:#fff;display:grid;place-items:center;font-size:32px}.eyebrow{font-size:11px;letter-spacing:1.5px;font-weight:900;color:#8290ac}.login-card .eyebrow{margin:24px 0 5px}.login-card h1{font-size:36px;margin:0;font-weight:900;letter-spacing:-1px}.muted{color:#8792a8}.login-card .muted{line-height:1.55;margin:8px 0 26px}.login-card label,.admin-form label{display:flex;flex-direction:column;gap:8px;font-size:13px;font-weight:800;margin:16px 0}.login-card input,.admin-form input,.inline-form input,.answer-form input{width:100%;padding:14px 15px;border:1px solid #e0e6f0;border-radius:13px;background:#fbfcff;outline:none;min-width:0}.login-card input:focus,.admin-form input:focus,.answer-form input:focus{border-color:#7185ff;box-shadow:0 0 0 3px #7185ff1c}.primary{border:0;background:#596ff0;color:#fff;border-radius:13px;padding:13px 18px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:900;box-shadow:0 7px 14px #596ff027;transition:transform .15s,background .15s}.primary:hover{background:#465de2;transform:translateY(-1px)}.primary:disabled{opacity:.65;cursor:wait}.full{width:100%;margin-top:7px;padding:15px}.login-foot{display:flex;align-items:center;justify-content:center;gap:7px;color:#929bb0;font-size:12px;margin:23px 0 0}.notice{background:#fff6db;color:#80621b;padding:12px 14px;border-radius:12px;font-size:13px;line-height:1.5;margin:12px 0}.error{color:#bf3451;font-size:13px;font-weight:800}.error-banner{background:#fff0f2;color:#a72e48;border-radius:12px;padding:12px 16px;margin-bottom:18px;display:flex;justify-content:space-between}.error-banner button{border:0;background:transparent;color:inherit;font-size:20px}.app-shell{min-height:100vh;display:flex}.sidebar{width:252px;background:#fff;border-right:1px solid #edf0f7;display:flex;flex-direction:column;padding:27px 17px;position:fixed;inset:0 auto 0 0;z-index:3}.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:900;letter-spacing:-.6px;padding:0 10px 30px}.logo-icon{background:#596ff0;color:#fff;border-radius:11px;width:34px;height:34px;display:grid;place-items:center;font-size:25px}.logo-accent{color:#596ff0}.profile-chip{display:flex;gap:10px;align-items:center;padding:13px 10px;background:#f5f7ff;border-radius:14px;margin-bottom:27px}.avatar{width:40px;height:40px;display:grid;place-items:center;border-radius:13px;background:#e4eaff;font-size:23px}.profile-chip strong,.profile-chip small{display:block}.profile-chip strong{font-size:13px}.profile-chip small{font-size:11px;color:#8c97ad;margin-top:3px}.sidebar nav{display:grid;gap:6px}.nav-item{width:100%;display:flex;align-items:center;gap:12px;border:0;background:transparent;color:#818ca3;padding:13px 12px;border-radius:12px;text-align:left;font-weight:800;font-size:13px}.nav-item.active{background:#edf0ff;color:#5369ed}.sidebar-bottom{margin-top:auto}.sidebar-tip{background:#fff7df;border-radius:15px;padding:16px;display:flex;flex-direction:column;gap:7px;color:#a17b1d;margin-bottom:18px}.sidebar-tip strong{font-size:12px;color:#735b20}.sidebar-tip span{font-size:11px;color:#a18d5b;line-height:1.4}.logout{color:#9aa3b6}.main-content{margin-left:252px;width:calc(100% - 252px);padding:29px clamp(22px,4vw,60px) 18px;max-width:1700px}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px}.topbar h2{font-size:25px;margin:5px 0 0;font-weight:900;letter-spacing:-.5px}.top-actions{display:flex;align-items:center;gap:14px}.points-pill{background:#fff2d5;color:#a57913;border-radius:30px;padding:10px 15px;display:flex;align-items:center;gap:7px;font-weight:900;font-size:13px}.avatar.small{width:42px;height:42px;border-radius:50%;background:#e1edff}.practice-layout{max-width:1060px;margin:auto}.welcome-banner{border-radius:24px;padding:29px 35px;background:linear-gradient(105deg,#6378f5,#8b9cff);color:#fff;display:flex;justify-content:space-between;align-items:center;overflow:hidden;position:relative;min-height:190px}.banner-tag{font-size:10px;font-weight:900;letter-spacing:1px;background:#ffffff2b;border-radius:20px;padding:7px 10px}.welcome-banner h1{font-size:31px;line-height:1.15;letter-spacing:-.7px;margin:18px 0 9px}.welcome-banner p{margin:0;font-size:13px;color:#edf0ff}.banner-art{font-size:92px;transform:rotate(-12deg);margin-right:7%;filter:drop-shadow(0 15px 12px #2b368f40);position:relative}.banner-art span{font-size:26px;position:absolute;top:-5px;right:-15px;color:#ffe69c}.stats-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:18px 0}.stat-card{display:flex;gap:12px;align-items:center;background:#fff;border:1px solid #edf0f7;border-radius:17px;padding:17px}.stat-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:13px}.purple{background:#efedff;color:#7567df}.orange{background:#fff1dc;color:#e6a13b}.green{background:#e1f8eb;color:#36aa72}.stat-card small{display:block;color:#929bb0;font-size:11px;font-weight:700}.stat-card strong{font-size:20px;font-weight:900;display:block;margin-top:3px}.stat-card strong small{display:inline;font-size:10px}.exercise-card{background:#fff;border:1px solid #edf0f7;border-radius:22px;padding:24px 27px}.exercise-head{display:flex;align-items:center;justify-content:space-between}.exercise-head h3{font-size:20px;margin:5px 0 0}.level-pill{background:#fff7df;color:#a67b17;padding:8px 11px;border-radius:10px;font-size:11px;font-weight:900}.operation-toggle{display:flex;gap:8px;margin:21px 0 17px}.operation-toggle button{border:1px solid #e8ebf4;background:#fff;color:#8892a7;border-radius:11px;padding:10px 15px;font-weight:900;font-size:12px}.operation-toggle button.selected{border-color:#d5dcff;background:#f0f2ff;color:#586ef0}.question-box{border:2px dashed #e1e7ff;border-radius:17px;background:#f9faff;text-align:center;padding:23px 15px}.question-label{font-size:10px;font-weight:900;letter-spacing:1.5px;color:#9ca8ca}.question{font-size:clamp(31px,4vw,45px);font-weight:900;letter-spacing:1px;color:#34466f;margin:10px 0}.question-box p{color:#939db2;font-size:12px;margin:0}.answer-form{display:flex;gap:10px;margin-top:14px}.answer-form input{text-align:center;font-size:17px;font-weight:900;flex:1}.answer-form .primary{min-width:150px}.feedback{margin-top:12px;padding:11px 14px;border-radius:10px;background:#fff1e9;color:#b96832;font-size:13px;font-weight:900}.feedback.good{background:#e5f9ed;color:#258453}.exercise-foot{display:flex;justify-content:space-between;align-items:center;margin-top:18px;color:#a0a9bb;font-size:11px;font-weight:800}.encouragement{margin-top:17px;border:1px solid #f3e9c9;background:#fffaf0;border-radius:16px;padding:15px 19px;display:flex;align-items:center;gap:13px}.encouragement>span:first-child{font-size:25px}.encouragement strong{font-size:12px;color:#8a702f}.encouragement p{margin:3px 0 0;font-size:11px;color:#b09c68}.encouragement-stars{margin-left:auto;color:#efc35d;letter-spacing:4px}.panel{background:#fff;border:1px solid #edf0f7;border-radius:20px;padding:23px;margin-bottom:18px;min-width:0}.panel-title{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:19px}.panel-title h3{display:flex;align-items:center;gap:9px;margin:0;font-size:18px}.panel-title p{font-size:12px;color:#929bb0;margin:6px 0 0}.admin-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px}.wide{grid-column:1/-1}.admin-form{display:grid;gap:3px}.admin-form label{margin:8px 0}.admin-form .primary{margin-top:10px}.tiny{font-size:11px;line-height:1.5}.inline-form{display:flex;gap:8px}.inline-form .primary{white-space:nowrap}.team-list{margin-top:17px;display:grid;gap:9px}.team-row{display:flex;align-items:center;gap:10px;border:1px solid #edf0f7;border-radius:12px;padding:12px}.team-emoji{font-size:21px}.team-row strong{font-size:13px}.team-row .muted{margin-left:auto;font-size:11px}.count-pill{font-size:11px;font-weight:900;background:#f0f2ff;color:#596ff0;padding:7px 10px;border-radius:9px;white-space:nowrap}.student-table-head,.student-row{display:grid;grid-template-columns:1.2fr 1fr 1fr;align-items:center;gap:14px;padding:12px 9px}.student-table-head{font-size:10px;text-transform:uppercase;letter-spacing:.8px;color:#98a1b4;font-weight:900;background:#f8f9fd;border-radius:9px}.student-row{border-bottom:1px solid #f0f2f7;font-size:12px}.student-row strong{font-size:12px}.student-row>span{color:#7f8aa1}.student-row select{min-width:0;border:1px solid #e3e8f2;background:#fff;border-radius:9px;padding:8px;font-size:11px;color:#4b5873}.empty-state{text-align:center;padding:38px 15px}.empty-state>div{font-size:48px}.empty-state h3{margin:10px 0 5px}.empty-state p{color:#929bb0;font-size:13px}.leaderboard{display:grid;gap:9px}.leader-row{display:flex;align-items:center;gap:13px;padding:12px 14px;border:1px solid #edf0f7;border-radius:13px}.rank{width:27px;text-align:center;font-weight:900;color:#7f8ba3}.rank-1{font-size:20px}.leader-avatar{width:38px;height:38px;display:grid;place-items:center;background:#f1f4ff;border-radius:12px;font-size:22px}.leader-row strong{font-size:13px}.leader-points{margin-left:auto;font-size:12px;font-weight:900;color:#596ff0}.footer{text-align:center;color:#a3acbd;font-size:11px;padding:25px 0 8px}.footer span{padding:0 7px}@media(max-width:1000px){.login-page{padding:24px;gap:22px}.login-art{min-height:420px}.sidebar{width:210px}.main-content{margin-left:210px;width:calc(100% - 210px);padding:25px 22px}.admin-grid{grid-template-columns:1fr}.wide{grid-column:auto}.stat-card{padding:13px;gap:9px}.stat-icon{width:35px;height:35px}.stat-card strong{font-size:17px}}@media(max-width:700px){.login-page{display:flex;flex-direction:column;justify-content:center;padding:18px;gap:15px}.login-art{width:100%;min-height:180px;max-height:210px;border-radius:23px}.hero-mascot{font-size:110px}.math-bubble{font-size:13px;padding:8px 11px}.star-one,.star-two{font-size:30px}.login-card{padding:25px 22px;border-radius:23px}.login-card .eyebrow{margin-top:16px}.login-card h1{font-size:30px}.app-shell{display:block;padding-bottom:74px}.sidebar{inset:auto 0 0;width:100%;height:68px;padding:6px 10px;border-top:1px solid #edf0f7;border-right:0;flex-direction:row;align-items:center;justify-content:center;box-shadow:0 -5px 22px #253b6510}.logo,.profile-chip,.sidebar-bottom{display:none}.sidebar nav{display:flex;width:100%;justify-content:space-around;gap:3px}.nav-item{justify-content:center;flex-direction:column;gap:3px;padding:7px 5px;font-size:10px;max-width:105px}.nav-item svg{width:19px;height:19px}.main-content{margin:0;width:100%;padding:20px 14px 10px}.topbar{margin-bottom:18px}.topbar h2{font-size:20px}.topbar .eyebrow{font-size:9px}.top-actions{gap:8px}.points-pill{padding:8px 10px;font-size:11px}.avatar.small{width:36px;height:36px}.welcome-banner{padding:22px 20px;min-height:165px;border-radius:20px}.welcome-banner h1{font-size:26px;margin:14px 0 7px}.welcome-banner p{font-size:11px;max-width:230px}.banner-art{font-size:55px;margin-right:0}.stats-grid{gap:7px;margin:12px 0}.stat-card{display:block;padding:11px 9px;border-radius:13px}.stat-icon{width:31px;height:31px;margin-bottom:8px;border-radius:10px}.stat-icon svg{width:17px}.stat-card small{font-size:9px;line-height:1.25}.stat-card strong{font-size:16px}.stat-card strong small{display:block;margin-top:2px}.exercise-card{padding:18px 14px;border-radius:19px}.exercise-head h3{font-size:17px}.level-pill{font-size:9px;padding:7px}.operation-toggle{margin:17px 0 13px}.operation-toggle button{flex:1;padding:10px 5px;font-size:11px}.question-box{padding:23px 10px}.question{font-size:34px}.answer-form{flex-direction:column}.answer-form .primary{width:100%;min-height:47px}.answer-form input{min-height:48px}.exercise-foot{font-size:10px}.encouragement{padding:12px;gap:9px}.encouragement-stars{display:none}.panel{padding:16px 13px;border-radius:16px}.panel-title h3{font-size:15px}.panel-title p{line-height:1.5}.student-table-head,.student-row{grid-template-columns:1fr 1fr;gap:8px;padding:11px 4px}.student-table-head span:last-child{display:none}.student-row select{grid-column:1/-1;width:100%}.student-row strong{font-size:11px}.student-row>span{font-size:10px;overflow-wrap:anywhere}.inline-form{flex-direction:column}.inline-form .primary{width:100%;min-height:44px}.footer{font-size:10px}.admin-form .primary{min-height:45px}}.group-filter-label{display:flex;flex-direction:column;gap:8px;max-width:520px;margin:8px 0 18px;font-size:13px;font-weight:800}.group-filter-label select{width:100%;padding:13px 14px;border:1px solid #e0e6f0;border-radius:12px;background:#fbfcff;color:#34405a}.activity-table{overflow-x:auto}.activity-table .student-table-head,.activity-table .student-row{grid-template-columns:minmax(150px,1.35fr) minmax(65px,.55fr) minmax(75px,.65fr) minmax(60px,.5fr) minmax(160px,1.25fr);min-width:720px}.negative-points{color:#bf3451!important;font-weight:900}@media(max-width:700px){.activity-table .student-table-head,.activity-table .student-row{grid-template-columns:minmax(150px,1.35fr) minmax(65px,.55fr) minmax(75px,.65fr) minmax(60px,.5fr) minmax(160px,1.25fr);min-width:720px}.activity-table .student-table-head span:last-child{display:block}}.assignment-form{max-width:760px}.table-picker{margin:12px 0 8px;font-size:13px;font-weight:800}.table-checkboxes{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.table-checkboxes label{display:flex;align-items:center;gap:6px;border:1px solid #e3e8f2;border-radius:10px;padding:9px 12px;margin:0;background:#fbfcff;cursor:pointer}.table-checkboxes input{width:16px;height:16px;accent-color:#596ff0}.assignment-list h4{margin:4px 0;font-size:14px}.assignment-row>div{display:grid;gap:3px;min-width:0;flex:1}.assignment-row small{font-size:11px;color:#8792a8}.status-button{border:1px solid #e2e7f0;background:#f7f8fb;color:#778198;border-radius:9px;padding:8px 10px;font-size:11px;font-weight:900;white-space:nowrap}.status-button.active{border-color:#bdebd0;background:#e9fbf0;color:#258453}.assigned-task-picker{display:flex;flex-direction:column;gap:8px;margin:16px 0 6px;font-size:13px;font-weight:900}.assigned-task-picker select{width:100%;padding:12px 14px;border:1px solid #e0e6f0;border-radius:12px;background:#fbfcff;color:#34405a}.assigned-task-note{margin:10px 0 0;padding:10px 12px;border-radius:10px;background:#eef2ff;color:#5868b4;font-size:12px}.operation-toggle button:disabled{opacity:.6;cursor:not-allowed}.practice-work-area{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:16px;align-items:start;margin-top:16px}.practice-work-area .exercise-card{min-width:0}.practice-ranking-panel{display:flex;flex-direction:column;gap:14px;min-width:0}.practice-own-score,.practice-team-ranking{background:#fff;border:1px solid #edf0f7;border-radius:18px;padding:18px}.practice-own-score{background:linear-gradient(135deg,#fff7df,#fff);border-color:#f4e8c5}.practice-own-score strong{display:block;font-size:30px;font-weight:950;color:#a57913;margin:7px 0 2px}.practice-own-score small{display:block;color:#929bb0;font-size:11px;line-height:1.4}.practice-team-ranking h3{display:flex;align-items:center;gap:7px;margin:0;font-size:15px}.practice-team-ranking .leaderboard{margin-top:12px}.practice-team-ranking .leader-row{grid-template-columns:25px 28px minmax(0,1fr);gap:7px;padding:9px 0}.practice-team-ranking .leader-points{grid-column:3;justify-self:start;font-size:11px}.teacher-management-list{display:flex;flex-direction:column;gap:12px}.teacher-management-row{display:grid;grid-template-columns:minmax(150px,1.2fr) minmax(140px,1fr) minmax(120px,.7fr) auto;align-items:end;gap:12px;padding:14px;border:1px solid #edf0f7;border-radius:14px}.teacher-management-identity{display:flex;flex-direction:column;gap:4px;min-width:0}.teacher-management-identity strong{font-size:13px}.teacher-management-identity span,.teacher-management-identity small{font-size:11px;color:#929bb0;overflow-wrap:anywhere}.teacher-management-row label{display:flex;flex-direction:column;gap:6px;font-size:11px;font-weight:800;color:#737f96}.teacher-management-row input{width:100%;min-width:0}.teacher-management-row .primary{min-height:42px;white-space:nowrap}@media(max-width:1050px){.practice-work-area{grid-template-columns:minmax(0,1fr) 250px}}@media(max-width:800px){.practice-work-area{grid-template-columns:1fr}.practice-ranking-panel{display:grid;grid-template-columns:1fr 1fr}.teacher-management-row{grid-template-columns:1fr 1fr}.teacher-management-identity{grid-column:1/-1}.teacher-management-row .primary{width:100%}}@media(max-width:480px){.practice-ranking-panel,.teacher-management-row{grid-template-columns:1fr}.teacher-management-identity{grid-column:auto}.teacher-management-row .primary{width:100%}}.text-button{border:0;background:transparent;color:var(--primary, #6d5ce8);cursor:pointer;font:inherit;font-weight:600;padding:10px 4px;text-align:center}.text-button:hover{text-decoration:underline}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:grid;place-items:center;padding:20px;background:#141b2f9e;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px)}.announcement-modal{width:min(100%,460px);padding:30px 28px 24px;background:#fff;border-radius:24px;box-shadow:0 24px 80px #00000040;text-align:center;animation:announcement-pop .22s ease-out}.announcement-icon{font-size:54px;margin-bottom:8px}.announcement-modal h2{margin:8px 0 10px;font-size:25px;color:#283452}.announcement-modal>p:not(.eyebrow){color:#778198;font-size:14px;line-height:1.6}.announcement-details{margin:18px 0;padding:13px;border-radius:12px;background:#f5f6ff;color:#5967a8;font-size:12px;line-height:1.8}.announcement-modal .primary{margin-top:5px}@keyframes announcement-pop{0%{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}
