@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&display=swap');
:root{--ink:#282647;--muted:#6d6b83;--purple:#6352dd;--bg:#f6f7fc;--line:#e9e8f2;--white:#fff;--radius:22px;font-family:Nunito,'Segoe UI',sans-serif;color:var(--ink);font-size:16px}*{box-sizing:border-box}body{margin:0;background:var(--bg)}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #ee9d24;outline-offset:4px}.skip{position:fixed;top:-80px;z-index:10;background:white;padding:15px}.skip:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:260px;background:#fff;border-right:1px solid var(--line);padding:33px 24px;display:flex;flex-direction:column;z-index:2}.brand{display:flex;align-items:center;gap:11px;font-weight:900;font-size:1.06rem;line-height:1.4}.brand-icon{width:44px;height:44px;display:grid;place-items:center;background:var(--purple);color:white;font-size:2.4rem;border-radius:14px;flex-shrink:0}.brand-sub{display:block;font-size:.75rem;letter-spacing:2px;color:var(--muted);font-weight:800}.class-tag{display:flex;align-items:center;gap:10px;font-size:.88rem;color:var(--muted);margin:32px 0 25px;padding:12px;background:#f7f6ff;border-radius:14px}.class-tag span{background:#e8e4ff;color:#5241b9;padding:5px 10px;border-radius:8px;font-weight:900}nav{display:grid;gap:8px}nav a{padding:14px 15px;border-radius:13px;display:flex;align-items:center;gap:13px;font-weight:800;color:#76738b}nav a .nav-icon{font-size:1.2rem;width:24px;text-align:center}nav a.active{background:#eeebff;color:#5c46cd}nav a:hover{background:#f4f2ff}.sidebar-bottom{margin-top:auto;padding-top:20px;border-top:1px solid var(--line);display:flex;align-items:center;gap:10px}.teacher-avatar{display:grid;place-items:center;width:43px;height:43px;background:#ffe6bc;color:#9e6216;border-radius:50%;font-weight:900;flex-shrink:0}.sidebar-bottom strong{display:block;font-size:.88rem}.sidebar-bottom span{display:block;font-size:.78rem;color:var(--muted)}.shell{margin-left:260px}.topbar{padding:24px 40px;display:flex;align-items:center;justify-content:space-between;background:#ffffffb3;border-bottom:1px solid var(--line);gap:15px}.small-label{display:block;font-size:.72rem;font-weight:900;letter-spacing:1.5px;color:var(--purple)}.header-line{font-size:.92rem;font-weight:700;display:block;margin-top:3px}.header-actions{display:flex;gap:16px;align-items:center}.demo-label{color:var(--muted);font-size:.8rem}.outline{border:1px solid #ddd9ef;border-radius:11px;background:white;color:#5c5677;padding:10px 15px;font-weight:800;min-height:44px}main{padding:30px 40px;max-width:1450px;margin:auto;min-height:75vh}h1{font-size:2.25rem;line-height:1.2;letter-spacing:-.7px;margin:0 0 10px;font-weight:900}h2{font-size:1.25rem;margin:0;font-weight:900}h3{font-size:1.13rem;margin:0 0 8px;font-weight:900}p{line-height:1.6;margin:8px 0;color:var(--muted)}.welcome{position:relative;background:#e9e5ff;border:1px solid #dfd8ff;border-radius:26px;padding:30px 34px;display:flex;justify-content:space-between;align-items:center;gap:25px;overflow:hidden}.welcome .eyebrow{color:#6954b9;font-weight:900;font-size:.8rem;letter-spacing:1px;margin-bottom:10px}.welcome h1{max-width:650px}.welcome p{color:#6c6098;max-width:530px}.welcome-mark{font-size:6rem;color:#b5a4f5;line-height:1;transform:rotate(-12deg);padding-right:24px}.welcome .primary{margin-top:14px}.primary{border:0;background:var(--purple);color:#fff;padding:12px 20px;border-radius:12px;font-weight:900;min-height:46px}.primary:hover{background:#4f3dc3}.section-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:28px 0 16px}.text-link{color:var(--purple);font-weight:800;font-size:.9rem}.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.lesson{padding:23px;border-radius:var(--radius);border:1px solid transparent;text-align:left;position:relative;transition:transform .18s;background:#fff;color:var(--ink);min-height:195px}.lesson:hover{transform:translateY(-4px)}.lesson .symbol{display:grid;place-items:center;width:47px;height:47px;border-radius:14px;font-size:1.55rem;margin-bottom:17px;background:#ffffffa3}.lesson p{font-size:.88rem;margin:5px 0 15px;color:#5e5874}.lesson .meta{font-size:.76rem;font-weight:900;color:#6b608a}.purple{background:#ece7ff;border-color:#e2d9ff}.orange{background:#fff0d9;border-color:#fce3ba}.blue{background:#e0f2ff;border-color:#cbe7fc}.green{background:#e2f5e9;border-color:#c9ebd7}.lower-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:22px;margin-top:25px}.panel{background:white;border:1px solid var(--line);padding:24px;border-radius:var(--radius)}.panel .section-head{margin:0 0 18px}.game-banner{background:#fff2c9;border-radius:17px;display:flex;align-items:center;padding:20px;gap:20px}.game-emoji{font-size:3.2rem}.game-banner p{font-size:.88rem;margin:5px 0 12px}.pill{display:inline-block;font-size:.75rem;font-weight:900;padding:5px 9px;border-radius:7px;background:#ffffffa6;color:#91742a;margin-bottom:8px}.event{display:flex;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid var(--line)}.event:last-child{border:0}.date-tile{width:48px;background:#f3f1ff;color:#6750c7;border-radius:12px;text-align:center;padding:7px;flex-shrink:0;font-weight:900}.date-tile small{display:block;font-size:.68rem}.event strong{font-size:.9rem}.event p{font-size:.8rem;margin:2px 0}.mini-bar{margin-top:22px;background:#fff;border:1px solid var(--line);padding:18px 24px;border-radius:18px;display:flex;align-items:center;justify-content:space-between;gap:15px}.mini-bar .badge-icon{font-size:1.8rem;margin-right:10px}.mini-bar p{font-size:.86rem;margin:0}.page-title{margin:5px 0 26px}.page-title p{max-width:650px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.card{padding:25px;border-radius:22px;background:white;border:1px solid var(--line)}.card .big-icon{font-size:2.5rem;margin-bottom:12px}.card p{margin-bottom:18px}.card .primary{width:100%}.badge-card{text-align:center}.badge-card .big-icon{font-size:3.5rem}.badge-card.locked{background:#f0f0f6}.badge-status{font-size:.8rem;font-weight:900;color:var(--purple)}.calendar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:12px}.calendar{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:7px}.weekday{text-align:center;font-size:.8rem;font-weight:900;color:var(--muted);padding:8px}.day{min-height:88px;border-radius:12px;padding:9px;background:#f7f7fc;font-weight:800}.day.event-day{background:#ede7ff;color:#6543b9}.day small{display:block;font-size:.7rem;line-height:1.3;margin-top:5px;font-weight:700}.day.today{outline:2px solid var(--purple)}.day.blank{background:transparent}.calendar-layout{display:grid;grid-template-columns:1.7fr 1fr;gap:20px}.notice{background:#fff2d5;border-radius:13px;padding:15px;color:#7b612c;font-size:.9rem;line-height:1.6;margin-bottom:20px}.room-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}label{display:block;font-weight:800;margin:15px 0 7px}input,textarea{width:100%;border:1px solid #dedbe9;border-radius:10px;padding:12px;background:#fafaff;color:var(--ink)}textarea{min-height:120px;resize:vertical}.room-output{background:#f5f3ff;border-radius:13px;padding:18px;margin-top:18px;white-space:pre-wrap;overflow-wrap:anywhere}footer{padding:20px 40px 30px;display:flex;justify-content:space-between;gap:15px;font-size:.76rem;color:#8e8aa4}dialog{border:0;border-radius:24px;padding:27px;max-width:640px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 20px 100px #29264730;max-height:90vh}dialog::backdrop{background:#25213a80;backdrop-filter:blur(4px)}.dialog-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.close{border:0;background:#f0eef8;border-radius:50%;width:40px;height:40px;font-size:1.7rem;color:var(--muted)}.choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0}.choice{padding:18px;background:#f5f2ff;border:2px solid #e4dff8;border-radius:13px;font-weight:900;font-size:1.2rem;color:var(--ink)}.choice:disabled{cursor:default}.choice.correct{background:#dcf5e7;border-color:#6ebf92}.choice.wrong{background:#ffebe9;border-color:#e49e97}.question{font-size:2rem;text-align:center;font-weight:900;padding:22px 0}.progress{background:#ece9f7;height:8px;border-radius:10px;margin:15px 0}.progress span{display:block;background:var(--purple);height:100%;border-radius:10px}.feedback{min-height:50px;color:var(--purple);font-weight:800}.reading{font-size:1.15rem;line-height:1.85;color:#4d4667}.reading p{color:inherit}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#332b59;color:white;padding:14px 22px;border-radius:13px;z-index:10;display:none;max-width:90vw}.toast.show{display:block}.board-mode{font-size:20px}.board-mode .sidebar{width:280px}.board-mode .shell{margin-left:280px}.board-mode .grid{grid-template-columns:repeat(2,minmax(0,1fr))}.board-mode .cards{grid-template-columns:repeat(2,minmax(0,1fr))}.board-mode button{min-height:56px}@media(min-width:1700px){main{max-width:1550px}.lesson{min-height:230px}}@media(max-width:1150px){.sidebar{width:220px;padding:27px 16px}.shell{margin-left:220px}.topbar,main{padding:24px}.brand{font-size:.94rem}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.welcome-mark{font-size:4rem;padding:0}.lower-grid{grid-template-columns:1fr 1fr}.calendar-layout{grid-template-columns:1fr}}@media(max-width:760px){.sidebar,.board-mode .sidebar{position:relative;width:100%;padding:17px 18px;border-right:0;border-bottom:1px solid var(--line)}.brand{font-size:1rem}.brand-icon{width:39px;height:39px}.class-tag{position:absolute;top:8px;right:18px;margin:0;background:transparent;padding:8px;font-size:0}.class-tag span{font-size:.86rem}.sidebar-bottom{display:none}nav{display:flex;overflow-x:auto;gap:5px;margin-top:18px;padding-bottom:4px}nav a{flex-shrink:0;padding:10px 12px;font-size:.85rem;gap:6px}nav a .nav-icon{width:auto;font-size:1rem}.shell,.board-mode .shell{margin:0}.topbar{padding:15px 18px}.header-line{font-size:.8rem}.demo-label{display:none}.outline{padding:9px;font-size:.8rem}main{padding:20px 18px}.welcome{padding:25px 22px}.welcome h1{font-size:1.8rem}.welcome-mark{display:none}.welcome p{font-size:.9rem}.grid{gap:12px}.lesson{padding:18px;min-height:180px}.lesson h3{font-size:1rem}.lesson p{font-size:.8rem}.lesson .symbol{margin-bottom:12px}.lower-grid,.room-grid{grid-template-columns:1fr;gap:16px}.cards,.board-mode .cards{grid-template-columns:1fr}.panel{padding:20px}.mini-bar{padding:16px;align-items:flex-start}.mini-bar .badge-icon{display:none}.mini-bar .text-link{white-space:nowrap;font-size:.8rem}.day{min-height:70px;padding:6px;font-size:.85rem}.day small{font-size:.65rem}.calendar{gap:4px}.weekday{font-size:.7rem;padding:6px 0}.calendar-head h2{font-size:1rem}.calendar-head .outline{font-size:.85rem}footer{padding:15px 18px 25px;flex-direction:column;gap:5px}.board-mode{font-size:18px}.board-mode .grid{grid-template-columns:1fr}.section-head h2{font-size:1.15rem}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}

.teacher-avatar{object-fit:cover;object-position:center 35%}.welcome-avatar{width:180px;height:180px;object-fit:cover;object-position:center 35%;border-radius:50%;border:6px solid white;box-shadow:0 10px 30px #6352dd20;flex-shrink:0}@media(max-width:760px){.welcome{flex-wrap:wrap}.welcome-avatar{width:92px;height:92px;border-width:4px;order:-1}.welcome>div{width:100%}}