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27px;gap:8px;background:var(--surface);border-bottom:1px solid var(--line);overflow:auto;scrollbar-width:thin}.lesson-step{display:flex;align-items:center;justify-content:center;gap:8px;padding:9px 13px;min-height:37px;flex:1;border-radius:11px;background:transparent;color:var(--muted);font-size:11px;font-weight:650;white-space:nowrap}.lesson-step span{width:21px;height:21px;border-radius:7px;background:var(--surface-soft);display:grid;place-items:center;font-size:10px}.lesson-step[aria-current=step]{background:var(--accent-soft);color:var(--accent)}.lesson-step[aria-current=step] span{background:var(--accent);color:var(--surface)}.lesson-content{padding:26px 28px;min-height:340px}.lesson-video-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(240px,.8fr);gap:23px;align-items:start}.video-player{display:block;aspect-ratio:16/9;width:100%;background:var(--surface-soft);border:1px solid var(--line);border-radius:17px;object-fit:contain}.video-meta{font-size:11px;color:var(--muted);line-height:1.7;margin:13px 0 0}.lesson-aside{background:var(--surface);border:1px solid var(--line);border-radius:17px;padding:21px}.lesson-aside h3{font-size:15px;line-height:1.4;margin:0 0 12px}.lesson-aside p,.lesson-aside li{font-size:12px;color:var(--muted);line-height:1.8}.lesson-aside p{margin:0 0 14px}.lesson-aside ul{padding-left:18px;margin:10px 0 0}.lesson-aside strong{color:var(--text)}.lesson-aside .tag{font-size:10px;display:inline-flex;background:var(--mint);color:var(--mint-text);padding:6px 9px;border-radius:7px;margin-bottom:13px}.lesson-footer{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 27px;border-top:1px solid var(--line);background:var(--surface)}.lesson-footer-note{font-size:11px;color:var(--muted);line-height:1.6}.lesson-footer .button{min-height:43px}.lesson-body-heading{text-align:center;margin-bottom:23px}.lesson-body-heading .eyebrow{margin-bottom:10px}.lesson-body-heading h3{font-size:26px;letter-spacing:-.6px;line-height:1.35;margin:0 0 12px}.lesson-body-heading p{color:var(--muted);font-size:13px;line-height:1.7;max-width:740px;margin:0 auto}.activity-mount{min-height:250px}.teacher-instruction{margin:22px 0 0;padding:16px 18px;background:var(--yellow);color:var(--yellow-text);border-radius:13px;font-size:12px;line-height:1.8;display:flex;gap:11px}.teacher-instruction>.icon{width:19px;height:19px;flex-shrink:0;margin-top:3px}.discussion-panel{max-width:830px;margin:0 auto;padding:31px;background:var(--surface);border:1px solid var(--line);border-radius:22px}.discussion-panel h3{font-size:24px;line-height:1.4;letter-spacing:-.5px;margin:0 0 17px}.discussion-panel p,.discussion-panel li{font-size:15px;color:var(--muted);line-height:1.9}.discussion-panel ol,.discussion-panel ul{padding-left:23px;margin:15px 0}.discussion-panel .reflection-callout{display:flex;gap:13px;background:var(--mint);color:var(--mint-text);border-radius:14px;padding:18px;margin-top:25px;font-size:13px;line-height:1.8}.solution-bar{display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--mint);color:var(--mint-text);border-radius:16px;padding:20px;margin-top:24px}.solution-bar p{font-size:12px;line-height:1.7;margin:0}.solution-bar strong{display:block;margin-bottom:5px}.complete-banner{display:flex;align-items:center;justify-content:center;gap:9px;color:var(--mint-text);background:var(--mint);padding:12px;border-radius:11px;font-size:12px;font-weight:700;margin-bottom:20px}.video-only-dialog .lesson-content{max-width:920px;margin:0 auto}.video-only-dialog .video-player{max-height:65vh}.video-only-dialog .lesson-content h3{font-size:17px;margin:22px 0 10px}.video-only-dialog .lesson-content p{font-size:13px;color:var(--muted);line-height:1.8}.projector-mode{width:100vw;height:100dvh;max-height:100dvh;border-radius:0;border:0}.lesson-backdrop:has(.projector-mode){padding:0}.projector-mode .lesson-header{padding:20px 40px}.projector-mode .lesson-header h2{font-size:25px}.projector-mode .lesson-content{max-width:1500px;margin:0 auto;min-height:calc(100dvh - 265px);padding:32px 50px}.projector-mode .lesson-body-heading h3{font-size:37px}.projector-mode .lesson-body-heading p{font-size:19px;max-width:950px}.projector-mode .teacher-instruction,.projector-mode .lesson-aside p,.projector-mode .lesson-aside li{font-size:16px}.projector-mode .discussion-panel{max-width:1000px}.projector-mode .discussion-panel h3{font-size:32px}.projector-mode .discussion-panel p,.projector-mode .discussion-panel li{font-size:23px}.projector-mode .lesson-footer{padding:21px 40px}.projector-mode .lesson-footer .button{font-size:15px;min-height:49px;padding:13px 24px}.projector-mode .lesson-step{font-size:14px;min-height:43px}.projector-mode .lesson-step span{font-size:12px;width:25px;height:25px}.projector-mode .activity-mount{font-size:1.3em}.projector-mode .lesson-aside h3{font-size:20px}.projector-mode .solution-bar p{font-size:16px}.projector-mode .lesson-footer-note{font-size:13px}.projector-mode .video-player{max-height:60vh}.lesson-dialog:fullscreen{width:100vw;max-height:100vh;height:100vh;border:0;border-radius:0}.print-area{display:none}.import-feedback{font-size:11px;color:var(--muted);line-height:1.7;margin-top:12px}.screen-note{background:var(--yellow);color:var(--yellow-text);padding:15px 17px;font-size:11px;line-height:1.75;border-radius:12px;margin-top:20px}.status-error{color:#b5484a}.status-muted{color:var(--muted)}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media(min-width:1600px){.hero{min-height:330px}.hero-art img{max-width:490px}.lesson-card{min-height:237px}.lesson-card h3{font-size:16px}.lesson-card p{font-size:12px}.card-open{font-size:11px}}
@media(max-width:1250px){:root{--sidebar-width:205px}.sidebar{padding-left:13px;padding-right:13px}.topbar{padding-left:28px;padding-right:28px}.main-content{padding:28px 28px 38px}.hero{padding:28px}.hero h2{font-size:32px}.lesson-grid{gap:10px}.lesson-card{padding:15px 12px}.lesson-card h3{font-size:13px}.lesson-card-footer{align-items:flex-start;flex-direction:column;gap:8px}.card-open{width:100%;justify-content:center}.lesson-card-meta{font-size:10px}.lesson-card .complete-mark{min-height:13px}.week-grid{grid-template-columns:repeat(4,1fr)}.overview-item{padding:0 18px}.overview-item strong{font-size:13px}.hero-note{display:none}.domain-progress{gap:10px}.domain-progress-card{padding:17px}.teacher-layout{grid-template-columns:1.15fr 1fr}}
@media(max-width:1024px){:root{--sidebar-width:86px}.sidebar{padding:27px 12px 18px}.brand{padding:0;justify-content:center;margin-bottom:34px}.brand-wordmark,.sidebar-label,.nav-button>span,.sidebar-footer,.garden-note{display:none}.brand img{width:42px;height:42px}.nav-button{justify-content:center;padding:13px;min-height:50px}.nav-button .icon{width:23px;height:23px}.nav-dot{display:none!important}.main-nav{gap:13px}.topbar{height:85px}.main-content{min-height:calc(100vh - 85px)}.hero{grid-template-columns:1.2fr 1fr;min-height:282px}.hero h2{font-size:29px}.hero-art img{width:130%;margin-left:-15px}.hero-copy>p{font-size:11px}.view-heading{gap:15px}.age-button{padding:8px 10px;font-size:11px}.page-title{font-size:24px}.lesson-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.lesson-card{min-height:214px;padding:18px}.lesson-card h3{font-size:15px}.lesson-card-footer{flex-direction:row;align-items:center}.card-open{width:auto}.lesson-grid.search-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.bottom-grid{grid-template-columns:1fr 1fr}.teacher-tip{padding:20px;gap:12px}.teacher-tip .tip-icon{width:37px;height:37px}.journey-card{padding:20px}.video-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.domain-progress{grid-template-columns:repeat(3,1fr)}.progress-summary{grid-template-columns:1fr 1.2fr}.progress-feature{padding:24px;gap:18px}.progress-ring{width:77px;height:77px}.progress-feature strong{font-size:16px}.teacher-layout{grid-template-columns:1fr 1fr}.panel{padding:23px}.lesson-video-layout{grid-template-columns:1.4fr 1fr}}
@media(max-width:800px){.main-content{padding:24px}.topbar{padding:0 24px}.classroom-badge{font-size:10px;padding:11px}.view-heading{align-items:flex-start;flex-direction:column;gap:18px}.age-switch{align-self:flex-start}.hero{grid-template-columns:1.1fr 1fr;padding:27px 25px;min-height:279px}.hero h2{font-size:28px}.hero-kicker{font-size:9px}.hero-copy>p{font-size:11px;margin-bottom:18px}.hero-footer .button{font-size:11px;padding:11px 13px}.overview-strip{padding:17px 0}.overview-item{padding:0 13px;gap:9px}.overview-icon{width:31px;height:31px;border-radius:10px}.overview-icon .icon{width:17px;height:17px}.overview-item strong{font-size:11px;line-height:1.4}.overview-item span{font-size:9px}.section-title{font-size:17px}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.lesson-card{min-height:219px}.lesson-card:last-child:nth-child(odd){grid-column:1/-1;min-height:170px}.lesson-grid.search-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.search-grid .lesson-card:last-child:nth-child(odd){grid-column:auto;min-height:219px}.bottom-grid{grid-template-columns:1fr}.week-grid{grid-template-columns:repeat(3,1fr)}.progress-summary{grid-template-columns:1fr}.teacher-layout{grid-template-columns:1fr}.lesson-backdrop{padding:15px}.lesson-dialog{max-height:calc(100dvh - 30px);border-radius:20px}.lesson-header{padding:20px}.lesson-header h2{font-size:17px}.lesson-title-meta{font-size:9px}.lesson-steps{padding:13px 16px;gap:4px}.lesson-step{font-size:10px;padding:8px}.lesson-content{padding:23px 20px}.lesson-video-layout{grid-template-columns:1fr}.lesson-aside{padding:18px}.lesson-footer{padding:17px 20px}.lesson-body-heading h3{font-size:23px}.lesson-body-heading p{font-size:12px}.projector-label{display:none}.projector-button{width:40px;padding:0}.projector-mode .lesson-content{padding:25px}.projector-mode .lesson-header{padding:20px}.projector-mode .lesson-header h2{font-size:21px}.projector-mode .lesson-footer{padding:18px 22px}.projector-mode .lesson-body-heading h3{font-size:30px}.projector-mode .lesson-body-heading p{font-size:16px}.projector-mode .discussion-panel p,.projector-mode .discussion-panel li{font-size:18px}.projector-mode .lesson-step{font-size:11px}.projector-mode .lesson-video-layout{grid-template-columns:1.6fr 1fr}.projector-mode .lesson-aside p,.projector-mode .lesson-aside li{font-size:12px}.projector-mode .lesson-aside h3{font-size:16px}.discussion-panel{padding:24px}.discussion-panel h3{font-size:21px}.discussion-panel p,.discussion-panel li{font-size:13px}.solution-bar{flex-direction:column;align-items:stretch}.solution-bar .button{width:100%}.app-footer{flex-direction:column;align-items:flex-start;gap:5px}}
@media(max-width:600px){:root{--sidebar-width:0px}.sidebar{width:250px;transform:translateX(-102%);transition:transform .2s;padding:27px 19px 22px}.sidebar.is-open{transform:translateX(0)}.sidebar.is-open .brand-wordmark,.sidebar.is-open .sidebar-label,.sidebar.is-open .nav-button>span,.sidebar.is-open .sidebar-footer,.sidebar.is-open .garden-note{display:block}.sidebar.is-open .nav-button{justify-content:flex-start;padding:12px 15px}.sidebar.is-open .brand{justify-content:flex-start;padding:0 10px}.sidebar.is-open .main-nav{gap:8px}.sidebar.is-open .nav-dot{display:none}.menu-scrim.is-open{display:block;position:fixed;inset:0;background:#21193266;z-index:29}.topbar{height:74px;padding:0 20px;gap:10px}.mobile-menu{display:inline-flex;width:36px;height:36px;background:var(--surface);border:1px solid var(--line);border-radius:10px;align-items:center;justify-content:center}.mobile-menu 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.section-description{font-size:11px;max-width:185px;line-height:1.55;margin-top:6px}.section-title{font-size:18px}.week-control{gap:0;margin-top:-3px}.week-control .icon-button{width:24px;height:29px}.week-select{font-size:10px;max-width:91px;padding:5px 1px}.lesson-grid{gap:12px}.lesson-card{min-height:242px;padding:16px 13px;border-radius:16px}.lesson-card h3{font-size:14px;line-height:1.4}.lesson-card p{font-size:10px;margin-bottom:14px}.lesson-card-top{margin-bottom:15px}.skill-icon{width:38px;height:38px;border-radius:12px}.skill-icon .icon{width:22px;height:22px}.lesson-day{font-size:8px;letter-spacing:.8px}.lesson-card-footer{flex-direction:column;align-items:stretch;gap:10px}.lesson-card-meta{font-size:9px}.card-open{font-size:10px;min-height:34px;justify-content:center}.lesson-card:last-child:nth-child(odd){min-height:181px}.lesson-card:last-child:nth-child(odd) .lesson-card-footer{flex-direction:row;align-items:center}.lesson-card:last-child:nth-child(odd) .card-open{padding-left:15px;padding-right:15px}.bottom-grid{margin-top:19px;gap:15px}.teacher-tip{padding:20px}.teacher-tip h3,.journey-card h3{font-size:13px}.teacher-tip p,.journey-card p{font-size:11px}.app-footer{margin-top:26px;font-size:9px}.week-grid{grid-template-columns:repeat(2,1fr);gap:11px}.week-tile{padding:16px;min-height:125px}.filter-toolbar{gap:10px;margin:20px 0}.search-field{flex-basis:100%}.filter-select{flex:1;font-size:11px;max-width:none}.filter-chip{font-size:10px}.video-grid{grid-template-columns:1fr;gap:17px}.video-card-body{padding:19px}.video-card-body h3{font-size:16px}.video-card-body p{font-size:12px}.domain-progress{grid-template-columns:repeat(2,1fr);gap:12px}.domain-progress-card{padding:19px}.progress-feature{padding:25px;gap:22px}.progress-ring{width:83px;height:83px}.progress-feature strong{font-size:18px}.progress-explainer{padding:24px}.recent-row{padding:15px;gap:10px;flex-wrap:wrap}.recent-date{font-size:9px}.recent-row .button-small{min-height:30px;font-size:9px;padding:7px}.recent-row-main{min-width:125px}.panel{padding:23px}.panel h2{font-size:18px}.panel p{font-size:12px}.button-row .button{flex:1;font-size:11px}.teacher-steps{gap:22px}.lesson-backdrop{padding:0}.lesson-dialog{width:100%;height:100dvh;max-height:100dvh;border:0;border-radius:0}.lesson-header{padding:17px 17px;gap:10px}.lesson-header h2{font-size:17px;letter-spacing:-.25px}.lesson-header-actions{gap:6px}.lesson-header-actions .icon-button{width:35px;height:35px;border-radius:10px}.lesson-header-actions .icon{width:17px;height:17px}.lesson-title-meta{font-size:9px;line-height:1.5}.lesson-steps{padding:12px 12px;gap:2px}.lesson-step{min-height:39px;padding:7px 8px;font-size:9px;gap:5px}.lesson-step span{width:18px;height:18px;font-size:9px;border-radius:6px}.lesson-content{padding:23px 18px;min-height:330px}.lesson-video-layout{gap:18px}.lesson-aside{padding:20px}.lesson-aside h3{font-size:15px}.lesson-aside p,.lesson-aside li{font-size:12px}.video-player{border-radius:13px}.lesson-footer{padding:16px 18px;gap:12px;position:sticky;bottom:0;z-index:10}.lesson-footer .button{font-size:11px;padding:11px 14px;min-height:41px}.lesson-footer .button-ghost{padding-left:0;padding-right:0}.lesson-footer-note{font-size:9px;max-width:115px}.lesson-footer .button .icon{width:14px;height:14px}.lesson-body-heading{text-align:left;margin-bottom:23px}.lesson-body-heading h3{font-size:24px;line-height:1.35}.lesson-body-heading p{font-size:12px;line-height:1.8}.teacher-instruction{font-size:11px;padding:15px;gap:8px}.discussion-panel{padding:23px 21px}.discussion-panel h3{font-size:23px}.discussion-panel p,.discussion-panel li{font-size:13px;line-height:1.9}.discussion-panel .reflection-callout{font-size:12px;padding:15px}.solution-bar{padding:18px;gap:16px}.solution-bar p{font-size:11px}.projector-mode .lesson-header{padding:17px}.projector-mode .lesson-header h2{font-size:17px}.projector-mode .lesson-content{padding:23px 18px}.projector-mode .lesson-body-heading h3{font-size:27px}.projector-mode .lesson-body-heading p{font-size:14px}.projector-mode .lesson-video-layout{grid-template-columns:1fr}.projector-mode .lesson-step{font-size:9px;min-height:39px;padding:7px}.projector-mode .lesson-step span{font-size:9px;width:18px;height:18px}.projector-mode .lesson-footer{padding:16px 18px}.projector-mode .lesson-footer .button{font-size:11px;padding:11px 14px;min-height:41px}.projector-mode .lesson-footer-note{font-size:9px}.projector-mode .teacher-instruction{font-size:12px}.projector-mode .discussion-panel h3{font-size:25px}.projector-mode .discussion-panel p,.projector-mode .discussion-panel li{font-size:15px}.toast{font-size:11px;bottom:18px;width:max-content;max-width:calc(100vw - 36px)}.search-grid .lesson-card:last-child:nth-child(odd){min-height:242px}.search-grid .lesson-card:last-child:nth-child(odd) .lesson-card-footer{flex-direction:column;align-items:stretch}}
@media print{@page{margin:17mm}body{background:#fff!important;color:#222!important}.sidebar,.topbar,.main-content,.lesson-backdrop,.toast,.skip-link{display:none!important}.print-area{display:block!important;font-size:11pt;line-height:1.65;color:#222}.print-area h1{font-size:23pt;line-height:1.2;margin:0 0 10pt}.print-area h2{font-size:16pt;margin:22pt 0 10pt}.print-area h3{font-size:13pt;margin:0 0 7pt}.print-area .print-lesson{break-inside:avoid;border-top:1px solid #bbb;padding-top:14pt;margin-top:17pt}.print-area p{margin:7pt 0}.print-area .print-muted{color:#555}.print-area ul,.print-area ol{padding-left:19pt}.print-area .print-footer{font-size:9pt;margin-top:24pt;border-top:1px solid #bbb;padding-top:9pt}}

/* R62: calm classroom surfaces; existing illustration, skill and feedback colors remain. */
@media screen {
  :root { --radius: 30px; --shadow: 0 4px 18px #49346d08; }
  .main-shell, .topbar-title, .view-heading > div, .section-heading > div, .hero-copy { min-width: 0; }
  .sidebar { overflow-y: auto; overscroll-behavior: contain; padding-top: 28px; }
  .brand-wordmark { font-weight: 650; letter-spacing: .5px; }
  .brand-subtitle { letter-spacing: 1.3px; font-weight: 550; }
  .sidebar-label, .eyebrow { letter-spacing: .055em; font-weight: 600; }
  .nav-button { min-height: 50px; border-radius: 16px; font-size: 14px; }
  .nav-button[aria-current=page] { font-weight: 600; }
  .topbar { height: 88px; }
  .topbar-actions { gap: 10px; }
  .theme-button, .icon-button { width: 46px; height: 46px; min-height: 46px; border-radius: 15px; }
  .classroom-badge { min-height: 46px; border-radius: 15px; font-weight: 550; }
  .main-content { max-width: 1360px; min-height: calc(100vh - 88px); }
  .page-title { font-size: clamp(28px, 3vw, 36px); font-weight: 650; letter-spacing: -1.1px; line-height: 1.15; overflow-wrap: break-word; }
  .page-description { font-size: 14px; line-height: 1.65; max-width: 65ch; }
  .view-heading { gap: 20px; margin-bottom: 26px; }
  .age-switch { border-radius: 17px; gap: 4px; padding: 5px; }
  .age-button { min-height: 44px; min-width: 48px; border-radius: 12px; font-size: 13px; font-weight: 550; }
  .hero { border-radius: 30px; background: linear-gradient(125deg, var(--surface-soft), var(--hero)); border-color: var(--line); box-shadow: none; }
  .hero h2 { font-weight: 650; letter-spacing: -1.2px; line-height: 1.14; }
  .hero-copy > p { font-size: 14px; line-height: 1.7; }
  .hero-kicker { font-size: 11px; font-weight: 550; border-radius: 12px; }
  .hero-note { font-size: 11px; }
  .button { min-height: 48px; padding: 12px 18px; border-radius: 15px; font-size: 14px; font-weight: 550; line-height: 1.45; text-align: center; }
  .button-small, .journey-card .button-ghost { min-height: 44px; padding: 10px 12px; font-size: 13px; border-radius: 13px; }
  .button-ghost { padding-inline: 8px; }
  .overview-strip { border-radius: 22px; padding-block: 20px; }
  .overview-icon { width: 42px; height: 42px; border-radius: 14px; }
  .overview-item strong { font-size: 15px; font-weight: 600; line-height: 1.4; }
  .overview-item span { font-size: 12px; line-height: 1.5; }
  .section { margin-top: 34px; }
  .section-heading { flex-wrap: wrap; align-items: center; }
  .section-title { font-size: 22px; font-weight: 600; letter-spacing: -.6px; }
  .section-heading .section-description { font-size: 13px; line-height: 1.6; }
  .week-control { min-width: 0; gap: 2px; border-radius: 15px; padding: 3px; }
  .week-control .icon-button { width: 44px; height: 44px; min-height: 44px; border-radius: 12px; }
  .week-select { min-height: 44px; max-width: 160px; padding: 8px; font-size: 14px; font-weight: 550; }
  .lesson-grid, .lesson-grid.search-grid { grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr)); gap: 16px; }
  .lesson-card { padding: 20px; border-radius: 22px; min-height: 255px; }
  .lesson-card-top { margin-bottom: 18px; gap: 8px; }
  .skill-icon { width: 44px; height: 44px; border-radius: 15px; }
  .favorite-button { width: 44px; height: 44px; min-height: 44px; margin: 0; border-radius: 14px; }
  .favorite-button .icon { width: 20px; height: 20px; }
  .lesson-day { font-size: 11px; font-weight: 550; letter-spacing: .045em; line-height: 1.5; }
  .lesson-card h3 { font-size: 16px; font-weight: 600; line-height: 1.4; letter-spacing: -.2px; }
  .lesson-card p { font-size: 13px; line-height: 1.6; }
  .lesson-card-footer { gap: 12px; flex-wrap: wrap; }
  .lesson-card-meta, .complete-mark { font-size: 12px; white-space: normal; }
  .card-open { min-height: 44px; padding: 11px 14px; border-radius: 13px; font-size: 13px; font-weight: 550; }
  .card-open .icon { width: 15px; height: 15px; }
  .teacher-tip, .journey-card, .panel, .progress-feature, .progress-explainer, .domain-progress-card { border-radius: 24px; }
  .teacher-tip h3, .journey-card h3 { font-size: 17px; font-weight: 600; line-height: 1.4; }
  .teacher-tip p, .journey-card p, .progress-feature p, .progress-explainer p, .panel p { font-size: 14px; line-height: 1.7; }
  .app-footer { font-size: 12px; line-height: 1.6; }
  .search-field { min-width: 0; }
  .search-field input, .filter-select { min-height: 48px; min-width: 0; font-size: 16px; border-radius: 15px; }
  .search-field .icon { top: 16px; }
  .filter-chip { min-height: 46px; border-radius: 14px; font-size: 13px; font-weight: 550; }
  .week-tile { min-width: 0; min-height: 146px; padding: 19px; border-radius: 20px; }
  .week-tile strong { font-size: 14px; font-weight: 550; line-height: 1.5; }
  .week-number, .week-count { font-size: 12px; line-height: 1.5; }
  .search-results-heading { font-size: 14px; }
  .empty-state { border-style: solid; border-radius: 24px; }
  .empty-state h3 { font-size: 23px; font-weight: 600; line-height: 1.3; }
  .empty-state p { font-size: 14px; }
  .video-card { border-radius: 24px; }
  .video-card-body { padding: 22px; }
  .video-card-body h3 { font-size: 18px; font-weight: 600; }
  .video-card-body p { font-size: 14px; line-height: 1.65; }
  .video-card-body .button { min-height: 48px; font-size: 14px; }
  .domain-progress-card h3 { font-size: 15px; font-weight: 600; }
  .domain-progress-card p { font-size: 12px; line-height: 1.6; }
  .recent-list { border-radius: 22px; }
  .recent-row-main { min-width: 0; }
  .recent-row h3 { font-size: 14px; line-height: 1.5; font-weight: 600; }
  .recent-row p, .recent-date { font-size: 12px; line-height: 1.5; }
  .recent-row .button-small { min-height: 44px; font-size: 13px; padding: 10px 12px; }
  .panel h2 { font-size: 23px; font-weight: 600; line-height: 1.3; }
  .panel h3, .teacher-steps strong { font-size: 16px; font-weight: 600; }
  .teacher-steps p { font-size: 14px; line-height: 1.7; }
  .teacher-steps li::before { width: 36px; height: 36px; border-radius: 12px; font-weight: 600; }
  .account-status strong { font-size: 15px; }
  .account-status span, .curriculum-note, .parent-note, .import-feedback { font-size: 13px; line-height: 1.7; }
  .button-row .button { font-size: 14px; }
  .privacy-note, .screen-note { font-size: 13px !important; line-height: 1.65; border-radius: 16px; }
  .lesson-backdrop { background: #201833a3; }
  .lesson-dialog { border-radius: 30px; box-shadow: 0 16px 48px #17101f30; scroll-padding: 120px 0 110px; }
  .lesson-header > div:first-child { min-width: 0; }
  .lesson-header h2 { font-size: 22px; font-weight: 600; line-height: 1.3; overflow-wrap: break-word; }
  .lesson-title-meta { font-size: 12px; line-height: 1.5; }
  .lesson-header-actions { gap: 8px; }
  .lesson-steps { padding-block: 12px; gap: 6px; }
  .lesson-step { min-height: 48px; border-radius: 14px; font-size: 13px; font-weight: 550; }
  .lesson-step span { width: 25px; height: 25px; min-width: 25px; font-size: 12px; border-radius: 9px; }
  .lesson-content { padding: 28px; }
  .lesson-aside, .discussion-panel { border-radius: 24px; }
  .lesson-aside h3 { font-size: 18px; font-weight: 600; }
  .lesson-aside p, .lesson-aside li, .video-meta { font-size: 14px; line-height: 1.7; }
  .video-player { border-radius: 20px; }
  .lesson-footer { gap: 12px; }
  .lesson-footer .button { min-height: 48px; font-size: 14px; padding: 12px 16px; }
  .lesson-footer-note { font-size: 12px; line-height: 1.5; }
  .lesson-body-heading h3 { font-weight: 600; line-height: 1.3; }
  .lesson-body-heading p { font-size: 15px; line-height: 1.7; }
  .teacher-instruction { font-size: 14px; border-radius: 18px; }
  .solution-bar { border-radius: 22px; }
  .solution-bar p, .complete-banner { font-size: 14px; line-height: 1.6; }
  .projector-mode, .lesson-dialog:fullscreen { border-radius: 0; }
}
@media screen and (max-width: 1024px) {
  .topbar { padding-inline: 24px; }
  .lesson-card:last-child:nth-child(odd), .search-grid .lesson-card:last-child:nth-child(odd) { grid-column: auto; min-height: 255px; }
}
@media screen and (max-width: 800px) {
  .view-heading { align-items: stretch; }
  .hero { padding: 28px; }
  .hero-copy > p { font-size: 14px; }
  .overview-item { padding-inline: 14px; }
  .overview-item strong { font-size: 13px; }
  .overview-item span { font-size: 11px; }
  .age-switch { width: 100%; }
  .age-button { flex: 1; }
  .lesson-header h2 { font-size: 20px; }
  .lesson-content { padding: 24px; }
  .projector-button { min-width: 46px; }
}
@media screen and (max-width: 600px) {
  .topbar { min-height: 76px; height: auto; padding: 12px 16px; gap: 8px; }
  .topbar-title { flex: 1; gap: 10px; }
  .mobile-menu, .theme-button { width: 44px; height: 44px; min-width: 44px; min-height: 44px; border-radius: 14px; }
  .mobile-nav-title { font-size: 14px; font-weight: 600; line-height: 1.3; }
  .classroom-badge { min-height: 44px; padding: 8px; }
  .main-content { padding: 22px 16px 30px; }
  .page-title { font-size: 30px; }
  .page-description { font-size: 14px; }
  .age-switch { gap: 2px; }
  .age-button { padding: 10px 5px; font-size: 13px; }
  .hero { padding: 28px 24px 18px; border-radius: 28px; }
  .hero h2 { font-size: 32px; }
  .hero-footer .button { font-size: 14px; min-height: 48px; }
  .hero-art { margin-top: 10px; }
  .hero-art img { width: min(280px, 100%); left: 0; }
  .overview-strip { padding-block: 16px; }
  .overview-item { padding-inline: 10px; }
  .section-heading { flex-direction: column; align-items: stretch; gap: 16px; }
  .section-heading .section-description { max-width: none; font-size: 13px; }
  .week-control { align-self: flex-start; }
  .week-select { min-height: 44px; max-width: 180px; font-size: 16px; padding-inline: 8px; }
  .lesson-grid, .lesson-grid.search-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
  .lesson-card { min-height: 270px; padding: 16px; }
  .lesson-card-footer, .lesson-card:last-child:nth-child(odd) .lesson-card-footer, .search-grid .lesson-card:last-child:nth-child(odd) .lesson-card-footer { flex-direction: column; align-items: stretch; }
  .card-open { width: 100%; }
  .teacher-tip, .journey-card, .panel { padding: 22px; }
  .app-footer { font-size: 11px; }
  .filter-select { font-size: 16px; width: 100%; }
  .filter-chip { font-size: 13px; }
  .video-card-body { padding: 20px; }
  .recent-row-main { flex: 1 1 150px; }
  .lesson-dialog { border-radius: 0; }
  .lesson-header, .projector-mode .lesson-header { padding: 16px; gap: 12px; }
  .lesson-header h2, .projector-mode .lesson-header h2 { font-size: 18px; }
  .lesson-header-actions .icon-button { width: 44px; height: 44px; min-width: 44px; min-height: 44px; border-radius: 14px; }
  .lesson-header-actions .icon { width: 20px; height: 20px; }
  .lesson-title-meta { font-size: 11px; }
  .lesson-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); overflow: visible; padding: 10px 12px; gap: 4px; }
  .lesson-step, .projector-mode .lesson-step { min-height: 46px; padding: 9px; font-size: 12px; white-space: normal; text-align: left; justify-content: flex-start; }
  .lesson-step span, .projector-mode .lesson-step span { width: 24px; height: 24px; min-width: 24px; font-size: 12px; border-radius: 8px; }
  .lesson-content, .projector-mode .lesson-content { padding: 22px 16px; }
  .lesson-footer, .projector-mode .lesson-footer { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 12px 16px max(12px, env(safe-area-inset-bottom)); gap: 8px 10px; }
  .lesson-footer .button, .projector-mode .lesson-footer .button { min-width: 0; min-height: 48px; padding: 10px 12px; font-size: 13px; }
  .lesson-footer-note, .projector-mode .lesson-footer-note { grid-column: 1 / -1; grid-row: 2; max-width: none; text-align: center; font-size: 11px; }
  .video-only-dialog .lesson-footer .button { grid-column: 1 / -1; }
  .lesson-body-heading p { font-size: 14px; }
  .teacher-instruction, .projector-mode .teacher-instruction { font-size: 13px; }
  .discussion-panel { padding: 24px 20px; }
  .discussion-panel p, .discussion-panel li { font-size: 15px; }
  .solution-bar p { font-size: 14px; }
}
@media screen and (max-width: 420px) {
  .classroom-badge { display: none; }
  .lesson-grid, .lesson-grid.search-grid { grid-template-columns: minmax(0, 1fr); }
  .lesson-card, .lesson-card:last-child:nth-child(odd), .search-grid .lesson-card:last-child:nth-child(odd) { min-height: 230px; padding: 22px; }
  .lesson-card h3 { font-size: 18px; }
  .lesson-card-footer, .lesson-card:last-child:nth-child(odd) .lesson-card-footer { flex-direction: row; align-items: center; }
  .card-open { width: auto; }
  .overview-item strong { font-size: 12px; }
  .overview-item span { font-size: 11px; }
  .week-grid { gap: 10px; }
  .week-tile { padding: 16px; }
  .domain-progress { grid-template-columns: minmax(0, 1fr); }
  .progress-feature { padding: 22px; gap: 16px; }
  .button-row .button { flex-basis: 100%; }
}
@media screen and (max-height: 500px) {
  .sidebar { padding-top: 18px; }
  .sidebar .brand { margin-bottom: 22px; }
  .sidebar-bottom { padding-top: 24px; }
  .lesson-header { position: static; }
}
@media (hover: none) {
  .button:hover, .lesson-card:hover, .week-tile:hover { transform: none; }
  .video-cover:hover .play-disc { scale: 1; }
}