:root{--bg:#f7f8fc;--panel:#fff;--text:#15213b;--muted:#77819a;--line:#e7e9f1;--primary:#6857e8;--primary2:#816df4;--green:#21a66b;--blue:#4c8df6;--orange:#f29a45;--shadow:0 8px 28px rgba(35,42,75,.06)}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:14px/1.5 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}a{text-decoration:none;color:inherit}button,input,select{font:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:252px;background:#fff;border-right:1px solid var(--line);padding:26px 16px 20px;position:fixed;inset:0 auto 0 0;z-index:20}.brand{font-size:21px;font-weight:800;letter-spacing:-.6px;padding:0 7px 28px}.brand span{color:var(--primary)}.brand-icon{margin-right:9px}.side-nav{display:flex;flex-direction:column;gap:3px}.nav-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:11px;color:#59637b;font-weight:600}.nav-item:hover{background:#f4f2ff;color:var(--primary)}.nav-item.active{background:#eeeaff;color:var(--primary);font-weight:750}.nav-icon{width:20px;text-align:center;font-size:17px}.nav-divider{height:1px;background:var(--line);margin:10px 8px}.premium-card{position:absolute;left:16px;right:16px;bottom:18px;background:linear-gradient(145deg,#6d5bea,#8066f3);border-radius:18px;padding:19px;color:white;text-align:center;box-shadow:0 10px 24px rgba(104,87,232,.2)}.premium-title{font-size:16px;font-weight:800}.premium-copy{font-size:12px;opacity:.92;margin:8px 0 14px}.premium-btn{display:inline-block;background:#fff;color:#6756df;border-radius:9px;padding:8px 15px;font-weight:800;font-size:12px}.main-area{margin-left:252px;width:calc(100% - 252px)}.topbar{height:75px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:22px;padding:0 28px;position:sticky;top:0;z-index:10}.search{height:42px;border:1px solid #dfe2ec;border-radius:11px;display:flex;align-items:center;gap:10px;padding:0 13px;flex:1;max-width:650px;color:#68738d}.search input{border:0;outline:0;width:100%;color:var(--text)}.top-actions{margin-left:auto;display:flex;align-items:center;gap:20px;white-space:nowrap}.streak{color:#4d566d}.icon-btn{border:0;background:transparent;font-size:20px;position:relative;color:#5d667d}.icon-btn i{position:absolute;background:#ef5a65;color:#fff;font-size:9px;width:15px;height:15px;border-radius:50%;right:-6px;top:-3px;font-style:normal}.profile{display:flex;align-items:center;gap:9px}.avatar{width:34px;height:34px;border-radius:50%;background:#e9e5ff;color:#6351dc;display:grid;place-items:center;font-size:11px;font-weight:800}.profile small{display:block;color:#9098aa;font-size:11px}.logout{color:var(--primary);font-weight:650}.mobile-menu{display:none}.content{padding:34px 34px 55px;max-width:1500px;margin:auto}.welcome-row,.page-head,.leader-hero{display:flex;justify-content:space-between;gap:30px;align-items:flex-start;margin-bottom:24px}.eyebrow{color:var(--primary);font-size:11px;font-weight:850;letter-spacing:1.2px;margin-bottom:5px}h1{font-size:29px;line-height:1.2;margin:0 0 7px;letter-spacing:-.7px}h2{font-size:18px;margin:0 0 4px;letter-spacing:-.2px}h3{margin:0;font-size:14px}.welcome-row p,.page-head p,.admin-top p{color:var(--muted);margin:0}.goal-card{background:#fff;border:1px solid var(--line);border-radius:15px;width:300px;padding:17px 18px;box-shadow:var(--shadow)}.goal-head{display:flex;justify-content:space-between}.goal-head small{color:var(--primary);font-weight:800}.goal-card h3{margin:9px 0 12px}.progress{height:7px;background:#eef0f5;border-radius:99px;overflow:hidden}.progress span{display:block;height:100%;border-radius:99px;background:var(--primary)}.goal-bottom{display:flex;justify-content:space-between;margin-top:10px;font-size:12px;color:#8a92a5}.goal-bottom a{color:var(--primary);font-weight:700}.stat-grid,.admin-stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:23px}.stat-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:18px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow)}.stat-icon{width:45px;height:45px;border-radius:12px;display:grid;place-items:center;font-size:20px}.stat-icon.purple{background:#eeeaff;color:#6756e3}.stat-icon.blue{background:#eaf2ff;color:#4a87ee}.stat-icon.orange{background:#fff1e5;color:#e58c38}.stat-icon.green{background:#e8f8f0;color:#22a66d}.stat-card small{display:block;color:#7f899d;font-size:11px}.stat-card strong{display:block;font-size:24px;line-height:1.15;margin:3px 0}.up{font-size:11px;color:var(--green)}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(310px,.8fr);gap:22px}.dashboard-grid>div{display:flex;flex-direction:column;gap:22px}.panel{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px;box-shadow:var(--shadow)}.panel-title{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:18px}.panel-title p{color:#98a0b1;font-size:12px;margin:0}.panel-title>a{color:var(--primary);font-size:12px;font-weight:750}.skill{margin:16px 0}.skill-top{display:flex;justify-content:space-between;margin-bottom:7px}.skill-top span{display:flex;gap:9px;align-items:baseline}.skill-top small{color:#929aab}.skill-top strong{font-size:12px}.progress .purple{background:var(--primary)}.progress .blue{background:var(--blue)}.progress .orange{background:var(--orange)}.progress .green{background:var(--green)}.lesson-list{display:flex;flex-direction:column;gap:8px}.lesson-card{display:flex;align-items:center;gap:13px;border:1px solid #edf0f5;padding:12px;border-radius:12px}.lesson-card:hover,.recommend:hover{border-color:#dcd7ff;background:#fcfbff}.lesson-icon{width:40px;height:40px;border-radius:10px;background:#f0edff;display:grid;place-items:center;font-size:19px}.lesson-info{flex:1}.lesson-info p{margin:2px 0 7px;color:#8992a6;font-size:11px}.lesson-card>b{font-size:12px;color:var(--primary)}.tag{display:inline-block;background:#eeeaff;color:#6353d8;padding:3px 7px;border-radius:5px;font-size:10px;font-weight:800}.mini-progress{height:4px;background:#edf0f5;border-radius:99px;max-width:190px}.mini-progress span{display:block;height:100%;background:var(--primary);border-radius:99px}.recommend{display:flex;gap:12px;align-items:center;padding:11px 0;border-bottom:1px solid #eff1f5}.recommend:last-child{border-bottom:0}.recommend-icon{width:39px;height:39px;border-radius:10px;background:#f2f0ff;display:grid;place-items:center}.recommend div:nth-child(2){flex:1}.recommend h3{font-size:13px}.recommend span{font-size:11px;color:#929aab}.recommend>b{font-size:20px;color:#9ba2b2}.word-card{border-radius:15px;padding:23px;background:linear-gradient(145deg,#6b58e8,#806bf2);color:white;box-shadow:0 12px 28px rgba(104,87,232,.18)}.word-label{font-size:10px;letter-spacing:1px;font-weight:800;opacity:.85}.word{font-size:28px;font-weight:850;margin-top:8px}.pronounce{color:#8d96a9;font-size:12px}.word-card .pronounce{color:#e2ddff}.word-card .meaning{margin-top:10px;font-size:12px}.word-card p{font-style:italic;font-size:12px;opacity:.9}.secondary-btn{border:1px solid #e2e4ec;background:#fff;border-radius:8px;padding:8px 12px;color:#555f76;cursor:pointer}.word-card .secondary-btn{border:0;color:#6352dc}.quick h2{margin-bottom:14px}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.quick-grid a{border:1px solid #edf0f4;padding:12px;border-radius:10px}.quick-grid a:first-child{color:#6252de}.quick-grid a:nth-child(2){color:#4b87ec}.quick-grid a:nth-child(3){color:#e08a38}.quick-grid a:nth-child(4){color:#20a56c}.quick-grid b,.quick-grid small{display:block}.quick-grid b{font-size:12px;color:var(--text);margin-top:4px}.quick-grid small{font-size:10px;color:#9299aa}.primary-btn{display:inline-flex;align-items:center;justify-content:center;border:0;background:var(--primary);color:white;border-radius:9px;padding:10px 15px;font-weight:750;cursor:pointer}.primary-btn.small{padding:7px 10px;font-size:11px}.full{width:100%;margin-top:9px}.filterbar{display:flex;gap:10px;margin-bottom:20px}.form-input{height:42px;border:1px solid #dfe2eb;background:#fff;border-radius:9px;padding:0 12px;outline:none;color:var(--text)}.filterbar .form-input:first-child{flex:1}.form-input:focus{border-color:#a9a0ef;box-shadow:0 0 0 3px #efedff}.vocab-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.vocab-card,.grammar-card,.practice-card,.course-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:19px;box-shadow:var(--shadow)}.vocab-top,.grammar-meta{display:flex;justify-content:space-between;align-items:center}.heart{border:0;background:transparent;font-size:22px;color:#9ca4b6;cursor:pointer}.heart.liked{color:#e85d77}.vocab-card h2{font-size:21px;margin-top:17px}.vocab-card .pronounce{margin:5px 0}.vocab-card .pronounce button{border:0;background:transparent;cursor:pointer}.meaning{font-weight:750}.vocab-card p{color:#8b93a5;font-size:12px;min-height:35px}.vocab-actions{display:flex;justify-content:space-between;align-items:center;margin-top:15px}.grammar-grid,.practice-grid,.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.grammar-card{display:block}.grammar-card h2{margin-top:14px}.grammar-card h4{margin:4px 0;color:#657087}.grammar-card p{color:#8b93a6;font-size:12px;min-height:38px}.grammar-card .progress{margin-top:15px}.practice-hero{display:flex;align-items:center;gap:18px;background:#fff;border:1px solid var(--line);border-radius:17px;padding:23px;margin-bottom:20px}.practice-icon{width:55px;height:55px;background:#eeeaff;color:var(--primary);border-radius:14px;display:grid;place-items:center;font-size:27px}.practice-card{display:block}.practice-card h2{margin:15px 0 5px}.practice-card p{color:#8d95a6;font-size:12px}.practice-foot{display:flex;justify-content:space-between;border-top:1px solid #edf0f5;padding-top:13px;margin-top:17px;color:#8d95a6;font-size:12px}.practice-foot b{color:var(--primary);font-size:18px}.quiz-top{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:22px}.quiz-score{background:#eeeaff;color:var(--primary);padding:9px 14px;border-radius:9px;font-weight:800}.quiz-card{max-width:800px;margin:auto;background:#fff;border:1px solid var(--line);border-radius:18px;padding:32px;text-align:center;box-shadow:var(--shadow)}.quiz-card small{display:block;color:#939aaa;margin:16px}.quiz-card h2{margin-top:12px}.answers{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:28px}.answers button{background:#fff;border:1px solid #e1e4ed;border-radius:10px;padding:14px;text-align:left;cursor:pointer}.answers button:hover,.answers button.selected{border-color:var(--primary);background:#f5f3ff;color:var(--primary)}.progress-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:20px}.big-stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:19px}.big-stat>span{font-size:20px}.big-stat small{display:block;color:#8b94a7;margin-top:10px}.big-stat strong{display:block;font-size:24px}.big-stat em{font-size:11px;color:var(--green);font-style:normal}.period{min-width:140px}.empty-favorite{text-align:center;background:#fff;border:1px dashed #dfe2eb;border-radius:16px;padding:65px 20px}.empty-favorite>div{font-size:42px;color:#b1b7c5}.empty-favorite p{color:#8d95a5}.course-card{display:block;padding:0;overflow:hidden}.course-art{height:115px;background:linear-gradient(135deg,#eeeaff,#f7f5ff);display:grid;place-items:center;font-size:40px}.course-body{padding:18px}.course-body h2{margin-top:10px}.course-body p{font-size:12px;color:#8b94a6;min-height:36px}.course-body small,.course-body>b{font-size:11px;color:#8c95a7}.course-body .progress{margin:12px 0 5px}.leader-hero{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.league{background:#eeeaff;color:var(--primary);padding:12px 16px;border-radius:12px;text-align:center}.league small{display:block;color:#8992a6}.leader-list{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;max-width:850px}.leader-row{display:flex;align-items:center;gap:14px;padding:14px 18px;border-bottom:1px solid #eff1f5}.leader-row:last-child{border:0}.leader-row.me{background:#f6f4ff}.rank{width:30px;color:#8c94a5;font-weight:800}.leader-name{flex:1}.leader-name small{display:block;color:#929aaa;font-size:10px}.lesson-detail{max-width:900px;margin:auto}.back{color:var(--primary);font-weight:700;display:inline-block;margin-bottom:16px}.lesson-cover{background:linear-gradient(145deg,#6a57e6,#806af2);color:white;border-radius:18px;padding:32px;text-align:center;margin-bottom:20px}.lesson-cover .tag{background:rgba(255,255,255,.17);color:white}.big-lesson-icon{font-size:44px;margin:10px}.lesson-cover h1{font-size:31px}.lesson-cover p{max-width:570px;margin:0 auto 18px;opacity:.88}.lesson-cover .primary-btn{background:#fff;color:var(--primary)}.lesson-step{display:flex;align-items:center;gap:15px;padding:15px 0;border-bottom:1px solid #edf0f5}.lesson-step:last-child{border:0}.lesson-step>span{width:36px;height:36px;border-radius:9px;background:#f0edff;color:var(--primary);display:grid;place-items:center;font-weight:800}.lesson-step div{flex:1}.lesson-step small{display:block;color:#929aaa}.lesson-step strong{color:var(--primary)}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:900px}.settings-grid label{display:block;margin:14px 0 6px;font-size:12px;font-weight:700}.settings-grid .form-input{width:100%}.setting-row{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #edf0f5;padding:15px 0}.setting-row small{display:block;color:#8d95a7;font-size:11px}.switch input{display:none}.switch span{display:block;width:43px;height:24px;background:#d9dce5;border-radius:99px;position:relative}.switch span:after{content:'';position:absolute;width:18px;height:18px;background:#fff;border-radius:50%;top:3px;left:3px;transition:.2s}.switch input:checked+span{background:var(--primary)}.switch input:checked+span:after{left:22px}.auth-body{min-height:100vh;display:grid;place-items:center;background:linear-gradient(145deg,#f5f3ff,#f8f9fc)}.auth-card{width:min(420px,calc(100% - 32px));background:#fff;border:1px solid var(--line);border-radius:20px;padding:34px;box-shadow:0 18px 50px rgba(30,35,70,.1)}.auth-brand{text-align:center;padding-bottom:10px}.auth-card h1{text-align:center;font-size:26px}.auth-card>.muted{text-align:center}.auth-card label{display:block;font-weight:700;font-size:12px;margin:16px 0 6px}.auth-card .form-input{width:100%}.demo-box{background:#f7f6ff;border-radius:10px;padding:12px;margin-top:17px;color:#686f83;font-size:11px}.alert{padding:10px;border-radius:9px;font-size:12px}.danger{background:#fff0f1;color:#c4424d}.admin-shell{display:flex;min-height:100vh}.admin-side{position:fixed}.admin-main{margin-left:252px;width:calc(100% - 252px);padding:35px}.admin-top{display:flex;justify-content:space-between;margin-bottom:25px}.admin-top small{color:var(--primary);font-weight:800;letter-spacing:1px}.admin-top a{color:var(--primary);font-weight:700}.admin-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.admin-links a{border:1px solid #edf0f5;border-radius:12px;padding:15px;display:grid;grid-template-columns:32px 1fr;column-gap:10px}.admin-links a:first-letter{color:var(--primary)}.admin-links span{grid-column:2;color:#8c94a5;font-size:11px}.toolbar{display:flex;gap:10px;margin-bottom:17px}.toolbar .form-input{flex:1}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:13px 10px;border-bottom:1px solid #edf0f5;font-size:12px}th{color:#8c94a5;font-weight:700}.status{background:#eaf8f1;color:#219967;padding:4px 8px;border-radius:6px;font-size:10px}.table-btn{border:1px solid #e2e4eb;background:#fff;border-radius:7px;padding:5px 9px;color:#657087}.admin-label{font-size:10px;color:#a0a6b5;font-weight:800;letter-spacing:1px;margin:0 8px 8px}
@media(max-width:1100px){.sidebar{width:220px}.main-area,.admin-main{margin-left:220px;width:calc(100% - 220px)}.stat-grid,.admin-stat-grid{grid-template-columns:1fr 1fr}.vocab-grid{grid-template-columns:1fr 1fr}.dashboard-grid{grid-template-columns:1fr}.grammar-grid,.practice-grid,.course-grid{grid-template-columns:1fr 1fr}.premium-card{display:none}.side-nav{max-height:calc(100vh - 80px);overflow:auto}}
@media(max-width:760px){.sidebar{transform:translateX(-100%);transition:.2s;width:250px}.sidebar.open{transform:translateX(0)}.main-area,.admin-main{margin-left:0;width:100%}.topbar{padding:0 14px;gap:10px}.mobile-menu{display:block;border:0;background:transparent;font-size:21px}.top-actions{gap:8px}.profile div:not(.avatar),.profile>span,.streak,.logout{display:none}.search{max-width:none}.content,.admin-main{padding:22px 15px}.welcome-row,.page-head,.leader-hero{flex-direction:column}.goal-card{width:100%}.stat-grid,.admin-stat-grid,.progress-stats{grid-template-columns:1fr 1fr}.vocab-grid,.grammar-grid,.practice-grid,.course-grid,.settings-grid{grid-template-columns:1fr}.filterbar{flex-direction:column}.answers{grid-template-columns:1fr}.admin-links{grid-template-columns:1fr}.admin-top{gap:15px}.admin-top h1{font-size:25px}}