@import"https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&family=Prompt:wght@400;500;600&display=swap";:root{--font-qdt-display: Prompt, "Gotham SSm", Gotham, Montserrat, "Avenir Next", "Helvetica Neue", Arial, ui-sans-serif, system-ui, "Segoe UI", sans-serif;--font-qdt-body: "Gotham SSm", Gotham, Montserrat, "Avenir Next", "Helvetica Neue", Arial, ui-sans-serif, system-ui, "Segoe UI", sans-serif;--font-qdt-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;--color-google-blue: #1a73e8;--color-google-green: #34a853;--color-google-yellow: #fbbc04;--color-google-red: #ea4335;--color-action-primary: var(--color-google-blue);--color-action-primary-strong: #174ea6;--color-success: var(--color-google-green);--color-reward: var(--color-google-yellow);--color-attention: var(--color-google-red);--color-special: #5f8f93;--color-surface: #ffffff;--color-surface-strong: #f8fafd;--color-surface-blue: #eaf4ff;--color-surface-green: #ecf7ef;--color-surface-yellow: #fff8df;--color-surface-red: #fff0ee;--color-text-primary: #202124;--color-text-secondary: #5f6368;--color-border: #dadce0;--color-border-strong: #9aa0a6;--color-nav: #09245a;--shadow-panel: 0 10px 30px rgb(60 64 67 / .1);--shadow-soft: 0 4px 14px rgb(60 64 67 / .08);color:var(--color-text-primary);background:var(--color-surface-strong);font-family:var(--font-qdt-body);font-synthesis:none;font-size:15px;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select,textarea{font:inherit;font-family:var(--font-qdt-body)}button{min-height:38px;border:0;border-radius:6px;background:var(--color-action-primary);color:#fff;cursor:pointer;font-size:.92rem;font-weight:500;line-height:1.15;padding:0 18px}.compact-button{min-height:32px;padding:0 13px}button:hover:not(:disabled){background:var(--color-action-primary-strong)}button:disabled{cursor:not-allowed;opacity:.55}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible{outline:3px solid var(--color-reward);outline-offset:3px}a{color:var(--color-action-primary);font-weight:600}.button-link{display:inline-grid;min-height:38px;place-items:center;border-radius:999px;padding:0 18px;text-decoration:none}.modal-backdrop{position:fixed;z-index:20;inset:0;display:grid;place-items:start center;overflow-y:auto;background:#09245a57;padding:clamp(18px,6vh,56px) 16px}.upload-modal{position:relative;display:grid;gap:10px;width:min(680px,100%);max-height:calc(100vh - 36px);overflow:auto;border:1px solid var(--color-border);border-radius:12px;background:var(--color-surface);box-shadow:0 24px 70px #20212438;padding:12px}.modal-close-button{justify-self:end;min-height:30px;border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text-primary);font-size:.82rem;padding:0 12px}.modal-close-button:hover:not(:disabled){border-color:var(--color-border-strong);background:var(--color-surface-strong)}h1,h2,h3,p{margin-top:0}h1,h2,h3,.brand-lockup strong,.product-tagline,.phase-label,.step-label,.test-label,legend{font-family:var(--font-qdt-display)}h1,h2,h3{letter-spacing:0}.app-shell{display:grid;grid-template-rows:auto 1fr auto;min-height:100vh;background:linear-gradient(180deg,#f8fbff,#fff 42%,#f8fafd),var(--color-surface-strong)}.topbar{position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:56px;padding:10px clamp(16px,4vw,52px);background:var(--color-nav);border-bottom:1px solid rgb(255 255 255 / .14)}.topbar:after{position:absolute;right:0;bottom:0;left:0;height:3px;background:linear-gradient(90deg,var(--color-google-blue) 0 25%,var(--color-google-red) 25% 50%,var(--color-google-yellow) 50% 75%,var(--color-google-green) 75% 100%);content:""}.brand-lockup{display:flex;align-items:center;gap:12px}.brand-lockup strong,.brand-lockup span{display:block}.brand-lockup span,.fine-print,footer,.mission-card p,.panel p,.welcome-copy p{color:var(--color-text-secondary)}.topbar .brand-lockup strong,.topbar .brand-lockup span{color:#fff}.brand-logo{width:36px;height:36px;flex:0 0 auto;border:1px solid rgb(255 255 255 / .28);border-radius:8px;background:#fff;object-fit:contain;padding:2px;box-shadow:none}.notice{max-width:920px;margin:12px auto 0;border:1px solid rgb(0 113 227 / .22);border-radius:12px;background:var(--color-surface-blue);padding:11px 14px;font-size:.9rem;font-weight:500}.notice:before{display:block;width:120px;height:4px;margin-bottom:10px;border-radius:999px;background:linear-gradient(90deg,#4285f4 0 25%,#34a853 25% 50%,#fbbc04 50% 75%,#ea4335 75% 100%);content:""}.welcome-screen,.today-screen,.form-screen{padding:clamp(14px,2.5vw,26px) clamp(12px,3vw,32px)}.welcome-screen{display:grid;grid-template-columns:minmax(0,1fr) minmax(180px,280px);gap:clamp(24px,6vw,72px);align-items:center;min-height:64vh;background:var(--color-surface-strong)}.welcome-copy{max-width:760px}.phase-label,.step-label{color:var(--color-text-secondary);font-size:.72rem;font-weight:500;letter-spacing:0;text-transform:uppercase}.welcome-copy h1,.today-screen h1{margin-bottom:10px;font-size:3.35rem;font-weight:500;line-height:1.03}.welcome-copy p,.mission-copy p{max-width:720px;font-size:1.12rem;line-height:1.6}.welcome-copy .product-tagline{color:var(--color-text-primary);font-size:1.35rem;font-weight:400;line-height:1.24}.legal-screen{display:grid;width:min(100%,820px);gap:18px;align-content:start;margin:0 auto;padding:clamp(34px,6vw,72px) clamp(18px,5vw,56px)}.legal-screen h1{margin:0;font-size:3rem;font-weight:500;line-height:1}.legal-copy{display:grid;gap:14px;border-top:1px solid var(--color-border);padding-top:18px}.legal-copy p,.legal-copy 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h1{margin-bottom:4px;color:var(--color-text-primary);font-size:2.1rem;text-align:center}.auth-choice-list,.email-auth-fields{display:grid;gap:14px}.auth-choice-button{display:grid;grid-template-columns:48px minmax(0,1fr) 48px;align-items:center;width:100%;min-height:54px;border:1px solid var(--color-border);border-radius:14px;background:var(--color-surface);color:var(--color-text-primary);font-size:1.08rem;font-weight:500;line-height:1.2;padding:0 18px;text-align:center;text-decoration:none}.auth-choice-button:hover:not(:disabled){border-color:var(--color-border-strong);background:var(--color-surface-blue)}.google-mark{font-weight:700;background:conic-gradient(#4285f4,#34a853,#fbbc05,#ea4335,#4285f4);-webkit-background-clip:text;background-clip:text;color:transparent}.mail-mark{justify-self:center;width:30px;height:22px;border:3px solid var(--color-text-primary);border-radius:5px;background:linear-gradient(32deg,transparent 47%,var(--color-text-primary) 48%,var(--color-text-primary) 52%,transparent 53%),linear-gradient(-32deg,transparent 47%,var(--color-text-primary) 48%,var(--color-text-primary) 52%,transparent 53%)}.apple-mark{color:var(--color-text-primary);font-size:.86rem;font-weight:700}.auth-more-button{min-height:44px;background:transparent;color:var(--color-text-primary);font-size:1.08rem;font-weight:500}.auth-more-button:hover:not(:disabled){background:transparent;color:var(--color-action-primary-strong)}.email-auth-fields{border-top:1px solid var(--color-border);padding-top:18px}.auth-divider{height:1px;margin-top:8px;background:var(--color-border)}.auth-alternate{margin:0;color:var(--color-text-primary);text-align:center}label{display:grid;gap:8px;font-weight:500}input,select,textarea{width:100%;border:1px solid var(--color-border);border-radius:12px;background:var(--color-surface);color:var(--color-text-primary);padding:10px 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var(--color-success);background:var(--color-surface-green);padding:14px}.today-screen{width:min(100%,1240px);margin:0 auto}.learning-frame{display:grid;grid-template-columns:260px minmax(0,1fr);border:1px solid var(--color-border);border-radius:8px;overflow:hidden;background:var(--color-surface);box-shadow:var(--shadow-soft)}.lesson-sidebar{display:grid;grid-template-rows:auto auto 1fr;gap:12px;border-right:1px solid var(--color-border);background:linear-gradient(180deg,#fff,#f8fbff);padding:18px 0}.lesson-sidebar-head{display:grid;grid-template-columns:6px minmax(0,1fr);gap:12px;align-items:center;padding:0 18px 12px;border-bottom:1px solid var(--color-border)}.lesson-sidebar-head strong,.lesson-sidebar-head span{display:block}.lesson-sidebar-head span{color:var(--color-text-secondary);font-size:.78rem;font-weight:500}.lesson-color-strip{align-self:stretch;min-height:42px;border-radius:999px;background:linear-gradient(180deg,var(--color-google-blue) 0 25%,var(--color-google-red) 25% 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0}.lesson-timeline-head{display:grid;gap:10px}.lesson-timeline-head h2{margin:2px 0 0;font-size:1rem;font-weight:600}.lesson-timeline-head button{width:100%;min-height:38px}.lesson-brick-stack{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;padding:8px;border:1px solid var(--color-border);border-radius:8px;background:#fff}.lesson-brick{display:block;height:18px;border-radius:3px;border:1px solid var(--color-border);background:var(--color-surface-strong)}.lesson-brick-complete.lesson-brick-math{border-color:var(--color-google-red);background:var(--color-google-red)}.lesson-brick-complete.lesson-brick-reading{border-color:var(--color-google-blue);background:var(--color-google-blue)}.lesson-brick-complete.lesson-brick-mixed{border-color:var(--color-google-blue);background:linear-gradient(90deg,var(--color-google-red) 0 33%,var(--color-google-blue) 33% 66%,var(--color-google-green) 66% 100%)}.lesson-brick-current{border-color:var(--color-text-primary);box-shadow:inset 0 0 0 2px #fff}.lesson-brick-caption{margin:-4px 0 0;color:var(--color-text-secondary);font-size:.78rem;font-weight:600}.lesson-timeline-list{display:grid;gap:0}.lesson-timeline-item{position:relative;display:grid;grid-template-columns:16px minmax(0,1fr);gap:10px;padding:0 0 14px}.lesson-timeline-item:before{position:absolute;top:14px;bottom:0;left:7px;width:1px;background:var(--color-border);content:""}.lesson-timeline-item:last-child{padding-bottom:0}.lesson-timeline-item:last-child:before{display:none}.lesson-timeline-dot{position:relative;z-index:1;width:15px;height:15px;margin-top:4px;border:3px solid #ffffff;border-radius:50%;background:var(--color-action-primary);box-shadow:0 0 0 1px var(--color-action-primary)}.lesson-timeline-math .lesson-timeline-dot{background:var(--color-google-red);box-shadow:0 0 0 1px var(--color-google-red)}.lesson-timeline-reading .lesson-timeline-dot{background:var(--color-google-blue);box-shadow:0 0 0 1px var(--color-google-blue)}.lesson-timeline-mixed .lesson-timeline-dot{background:linear-gradient(90deg,var(--color-google-red) 0 33%,var(--color-google-blue) 33% 66%,var(--color-google-green) 66% 100%)}.lesson-timeline-current .lesson-timeline-copy{border-color:#20212438;box-shadow:inset 0 0 0 1px #2021240d}.lesson-timeline-copy{display:grid;gap:5px;min-width:0;border:1px solid var(--color-border);border-radius:8px;background:#fff;padding:9px 10px}.lesson-timeline-copy .block-time{width:fit-content;min-width:0;aspect-ratio:auto;border-radius:999px;padding:3px 7px}.lesson-timeline-copy strong,.lesson-timeline-copy span{display:block}.lesson-timeline-copy strong{font-size:.9rem;font-weight:600}.lesson-timeline-copy>span:not(.block-time){color:var(--color-text-secondary);font-size:.78rem;font-weight:500}.lesson-workspace{display:grid;align-content:start;gap:12px;min-width:0;padding:18px 22px 22px}.mission-copy{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:0;text-align:left}.mission-copy h1{margin:0;font-size:1.85rem;font-weight:500;letter-spacing:0}.mission-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:26px 0}.mission-card{min-height:210px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface);padding:18px}.mission-card h2{margin:16px 0 10px;font-size:2rem}.student-workbench{display:grid;grid-template-columns:minmax(0,1fr);gap:8px;align-items:start;margin-top:-4px}.status-badge{display:inline-flex;align-items:center;min-height:28px;border-radius:999px;padding:0 12px;font-size:.82rem;font-weight:500}.status-blue{background:var(--color-surface-blue);color:var(--color-action-primary-strong)}.status-green{background:var(--color-surface-green);color:var(--color-success)}.status-yellow{background:var(--color-surface-yellow);color:#b06000}.status-purple{background:#eef8f8;color:var(--color-special)}.runner-panel{display:grid;gap:12px;margin:10px 0 0;border-top:1px solid var(--color-border);padding-top:16px}.mission-plan-panel{display:grid;gap:10px;margin:0;border:1px solid var(--color-border);border-radius:8px;background:var(--color-surface);padding:14px 16px}.rewards-panel{display:grid;gap:18px;margin:30px 0;border-top:1px solid var(--color-border);padding-top:28px}.reward-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.reward-stats span,.reward-list article,.creative-grid article{display:grid;gap:8px;border:1px solid var(--color-border);border-radius:16px;background:var(--color-surface);padding:14px}.reward-stats strong,.reward-list strong{font-size:1.1rem;font-weight:600}.reward-list,.creative-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.reward-list article span{color:var(--color-action-primary-strong);font-weight:600}.reward-list p,.creative-grid p{margin:0;color:var(--color-text-secondary);line-height:1.45}.creative-grid h3{margin:0;font-size:1rem}.activity-list{display:grid;gap:10px}.activity-row{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px;align-items:center;border-top:1px solid var(--color-border);padding-top:8px}.activity-row:first-child{border-top:0;padding-top:0}.activity-row p{margin:4px 0 0;color:var(--color-text-secondary);line-height:1.45}.activity-meta{color:var(--color-text-secondary);font-size:.9rem;font-weight:600;text-align:right}.practice-block-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px}.practice-block{display:grid;gap:8px;border:1px solid var(--color-border);border-radius:8px;background:#fff;padding:10px}.practice-block-head{display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:center}.practice-block-head strong,.practice-block-head span{display:block}.practice-block-head span{color:var(--color-text-secondary);font-size:.85rem;font-weight:500}.block-time{display:grid;width:38px;aspect-ratio:1;place-items:center;border-radius:50%;background:var(--color-surface-blue);color:var(--color-action-primary-strong);font-size:.7rem;font-weight:500;text-align:center}.block-progress{height:6px;overflow:hidden;border-radius:999px;background:var(--color-surface-strong)}.block-progress span{display:block;height:100%;border-radius:inherit;background:var(--color-action-primary)}.lesson-timeline-math .block-progress span{background:var(--color-google-red)}.lesson-timeline-reading .block-progress span{background:var(--color-google-blue)}.lesson-timeline-mixed .block-progress span{background:linear-gradient(90deg,var(--color-google-red) 0 33%,var(--color-google-blue) 33% 66%,var(--color-google-green) 66% 100%)}.upload-progress{display:grid;gap:8px;color:var(--color-text-secondary);font-size:.95rem;font-weight:500}.upload-progress span{display:block;height:6px;overflow:hidden;border-radius:999px;background:linear-gradient(90deg,#4285f4 0 18%,#34a853 18% 36%,#fbbc04 36% 54%,#ea4335 54% 72%,#4285f4 72% 100%) 0 0 / 180% 100%;animation:upload-progress-slide 1.1s linear infinite}@keyframes upload-progress-slide{to{background-position-x:180%}}.skill-map-panel{display:grid;gap:18px;margin:34px 0;border-top:1px solid var(--color-border);padding-top:28px}.skill-map-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.skill-state-card{display:grid;gap:14px;border:1px solid var(--color-border);border-radius:18px;background:var(--color-surface);padding:14px}.skill-state-head{display:grid;gap:10px}.mastery-meter{height:14px;overflow:hidden;border-radius:999px;background:var(--color-surface-blue)}.mastery-meter span{display:block;height:100%;border-radius:inherit;background:var(--color-success)}.skill-state-card 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