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7px;font-size:18px;line-height:1.2}.module-card p{color:var(--muted);-webkit-line-clamp:3;-webkit-box-orient:vertical;margin:0 0 15px;font-size:11px;line-height:1.55;display:-webkit-box;overflow:hidden}.add-button{background:var(--white);width:100%;min-height:43px;color:var(--ink);cursor:pointer;border:1px solid #ccd7d9;border-radius:10px;justify-content:center;align-items:center;gap:8px;margin-top:auto;font-size:11px;font-weight:780;display:flex}.add-button:hover:not(:disabled){border-color:var(--teal);background:var(--teal-pale);color:var(--teal-dark)}.add-button:disabled{background:var(--teal-pale);color:var(--teal-dark);opacity:1;border-color:#0000}.add-button span{font-size:17px;line-height:1}.lesson-panel{border-radius:var(--radius-lg);background:var(--paper);box-shadow:var(--shadow-lg);border:1px solid #102a431a;position:sticky;top:24px;overflow:hidden}.lesson-panel:before{background:linear-gradient(90deg, var(--teal) 0 46%, var(--gold) 46% 72%, var(--coral) 72%);content:"";height:7px;display:block}.plan-topline{border-bottom:1px solid #e6e0d3;justify-content:space-between;align-items:center;padding:25px 25px 19px;display:flex}.plan-count{background:var(--ink);width:40px;height:40px;color:var(--white);font-family:var(--font-geist-mono), monospace;border-radius:50%;place-items:center;font-size:13px;font-weight:700;display:grid}.empty-plan{border-radius:var(--radius-md);text-align:center;border:1px dashed #c8c1b0;margin:22px;padding:34px 25px}.empty-plan>span{background:var(--gold-pale);color:#8a6413;width:52px;height:52px;font-family:var(--font-geist-mono), monospace;border-radius:50%;place-items:center;margin:0 auto 14px;font-size:12px;font-weight:800;display:grid}.empty-plan h3{font-family:var(--font-display);margin:0 0 8px;font-size:19px}.empty-plan p{color:var(--muted);margin:0;font-size:12px;line-height:1.55}.plan-list{scrollbar-width:thin;scrollbar-color:#bdc5c6 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button{cursor:pointer;background:#f0f1ec;border:0;border-radius:7px;place-items:center;width:30px;height:30px;font-size:13px;display:grid}.plan-controls button:hover:not(:disabled){background:var(--teal-pale);color:var(--teal-dark)}.plan-controls .remove-control{background:var(--coral-pale);width:63px;color:var(--coral-dark);grid-column:1/-1;font-size:18px}.launch-block{background:#faf7ee;border-top:1px solid #e6e0d3;padding:20px 24px 25px}.launch-button{width:100%}.launch-block>p:last-child{color:var(--muted);text-align:center;margin:9px 0 0;font-size:10px}.class-header{z-index:20;background:var(--ink);color:var(--white);position:sticky;top:0;box-shadow:0 8px 24px #102a432b}.class-header-inner{grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:86px;display:grid}.pin-banner{background:#ffffff14;border:1px solid #ffffff38;border-radius:14px;align-items:center;gap:13px;padding:9px 10px 9px 16px;display:flex}.pin-banner>span{color:#a9bbc4;letter-spacing:.11em;text-transform:uppercase;font-size:9px;font-weight:800}.pin-banner strong{color:var(--white);font-family:var(--font-geist-mono), monospace;letter-spacing:.15em;font-size:22px;line-height:1}.pin-banner button{background:var(--gold);min-width:54px;min-height:36px;color:var(--ink);cursor:pointer;border:0;border-radius:8px;padding:0 10px;font-size:10px;font-weight:800}.class-header-meta{justify-content:flex-end;align-items:center;gap:14px;display:flex}.identity-chip{align-items:center;gap:8px;display:flex}.identity-chip>span{background:var(--teal);width:34px;height:34px;font-family:var(--font-display);border-radius:50%;place-items:center;font-size:16px;font-weight:700;display:grid}.identity-chip>div{gap:1px;display:grid}.identity-chip small{color:#92aab5;letter-spacing:.07em;text-transform:uppercase;font-size:8px;font-weight:700}.identity-chip strong{font-size:11px}.socket-status{color:#bbcad0;align-items:center;gap:7px;font-size:9px;font-weight:700;display:inline-flex}.socket-status i{background:#8b9ba3;border-radius:50%;width:8px;height:8px}.socket-live i{background:#46c6ae;box-shadow:0 0 0 4px #46c6ae1f}.socket-connecting i,.socket-reconnecting i{background:var(--gold)}.leave-button{color:#d5e0e5;background:0 0;border:1px solid #ffffff2e;min-height:38px;padding:0 12px;font-size:9px}.leave-button:hover{background:#ffffff14}.copy-announcement{clip:rect(0, 0, 0, 0);width:1px;height:1px;position:absolute;overflow:hidden}.class-layout{grid-template-columns:minmax(0,1fr) 330px;align-items:start;gap:26px;padding-block:35px 64px;display:grid}.class-main{min-width:0}.lesson-progress{scrollbar-width:none;gap:8px;padding:2px 2px 17px;display:flex;overflow-x:auto}.lesson-progress::-webkit-scrollbar{display:none}.lesson-progress span{color:#7c8a91;background:#fffdf7b8;border:1px solid #d7d2c7;border-radius:999px;flex:0 0 132px;grid-template-columns:27px 1fr;align-items:center;gap:7px;min-width:0;padding:7px 10px 7px 7px;display:grid}.lesson-progress b{width:27px;height:27px;font-family:var(--font-geist-mono), monospace;background:#e3e1da;border-radius:50%;place-items:center;font-size:9px;display:grid}.lesson-progress em{text-overflow:ellipsis;white-space:nowrap;font-size:9px;font-style:normal;font-weight:700;overflow:hidden}.lesson-progress .complete{color:var(--teal-dark);border-color:#168f8a33}.lesson-progress .complete b{background:var(--teal-pale)}.lesson-progress .current{border-color:var(--ink);background:var(--ink);color:var(--white)}.lesson-progress .current b{background:var(--gold);color:var(--ink)}.activity-stage{border-radius:var(--radius-lg);background:var(--paper);min-height:500px;box-shadow:var(--shadow-lg);border:1px solid #102a431a;grid-template-columns:minmax(260px,.8fr) minmax(330px,1fr);display:grid;position:relative;overflow:hidden}.activity-stage:after{border-right:8px solid var(--gold);border-bottom:8px solid var(--gold);content:"";pointer-events:none;border-radius:0 0 27px;width:110px;height:110px;position:absolute;bottom:0;right:0}.module-stage{background:#07111f;min-height:min(760px,100vh - 230px);display:block}.module-stage:after{display:none}.module-frame{background:#07111f;border:0;width:100%;height:min(760px,100vh - 230px);min-height:560px;display:block}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.stage-art{background:var(--navy);min-height:100%;position:relative;overflow:hidden}.stage-art:after{content:"";background:linear-gradient(#102a4300 45%,#102a4373);position:absolute;inset:0}.stage-art img{object-fit:cover;width:100%;height:100%}.stage-number{z-index:2;color:var(--white);font-family:var(--font-geist-mono), 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230px)}.single-login-note{color:var(--muted);text-align:center;justify-content:center;align-items:center;gap:10px;margin:18px auto 0;font-size:10px;font-weight:650;display:flex}.single-login-note span{background:var(--teal-pale);width:23px;height:23px;color:var(--teal-dark);border-radius:50%;place-items:center;font-size:11px;display:grid}@media (width<=1240px){.hero{grid-template-columns:minmax(0,.78fr) minmax(540px,1.22fr);gap:46px}.entry-card{padding:23px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.class-header-meta .identity-chip>div,.socket-status{display:none}}@media (width<=1000px){.hero{grid-template-columns:1fr;gap:48px;padding-top:78px}.hero-copy,.hero 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55px}.module-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.module-card-body{min-height:205px;padding:14px}.class-header{position:sticky}.class-header-inner{grid-template-columns:auto 1fr;grid-template-areas:"brand meta""pin pin";gap:10px 16px;padding-block:10px}.class-header .brand{grid-area:brand}.pin-banner{grid-area:pin;justify-content:center;width:100%}.class-header-meta{grid-area:meta}.identity-chip,.socket-status{display:none}.class-layout{padding-block:22px 55px}.activity-stage{grid-template-columns:1fr}.stage-art{aspect-ratio:16/9;min-height:auto}.stage-copy{padding:35px 28px 48px}.teacher-command-bar{flex-direction:column;align-items:stretch}.command-buttons{grid-template-columns:repeat(3,1fr);display:grid}.command-buttons button{min-width:0;padding-inline:8px}.end-confirmation{flex-direction:column;align-items:stretch}.end-confirmation>div:last-child{justify-content:flex-end}.student-workspace .activity-stage{min-height:0}.module-stage,.module-frame{height:min(700px,100vh - 205px);min-height:520px}}@media (width<=520px){.brand-mark{width:37px;height:37px;font-size:22px}.brand-name{font-size:22px}.entry-nav a{min-height:40px;padding:10px 13px;font-size:12px}.hero{padding-top:54px}.hero h1{font-size:46px}.flow-line{display:grid}.entry-card{padding:22px 19px}.module-grid{grid-template-columns:1fr}.module-card-body{min-height:185px}.section-heading{flex-direction:column;align-items:flex-start}.section-heading h2{font-size:38px}.lesson-panel{border-radius:22px}.plan-list li{grid-template-columns:26px 46px minmax(0,1fr)}.plan-list img{width:46px;height:46px}.plan-controls{grid-column:2/-1;justify-content:flex-end;display:flex}.plan-controls .remove-control{width:30px}.roster-list{grid-template-columns:1fr}.activity-stage{border-radius:22px}.module-stage,.module-frame{height:calc(100vh - 190px);min-height:480px}.stage-copy 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