.learn-container{align-items:stretch;display:flex;flex-direction:column;max-width:var(--content-width);padding:42px 24px 84px}.clock-intro{align-items:end;display:grid;gap:60px;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr)}.clock-intro .page-lead{font-size:1.08rem;margin-bottom:4px;max-width:500px}.clock-title-block h1{max-width:680px}.clock-studio{background:var(--surface);border:1px solid var(--ink);display:grid;grid-template-columns:minmax(440px,1.28fr) minmax(360px,.72fr);margin-top:30px;min-height:540px;overflow:hidden}.clock-stage{align-items:center;background:var(--study-surface);border-right:1px solid var(--ink);display:flex;flex-direction:column;justify-content:center;min-height:540px;padding:70px 42px 34px;position:relative}.clock-task{left:28px;position:absolute;top:24px}.clock-task span,.clock-task strong{display:block}.clock-task span{color:var(--muted);font-size:.68rem;font-weight:800;margin-bottom:4px;text-transform:uppercase}.clock-task strong{font-family:var(--font-display);font-size:1rem;font-weight:600}.clock-wrapper{background:#fff;border:0;border-radius:50%;box-shadow:10px 10px #1c262324;flex-shrink:0;padding:0}#clockCanvas{aspect-ratio:1;border-radius:50%;cursor:grab;display:block;height:350px;touch-action:pan-y;width:350px}#clockCanvas:active{cursor:grabbing}.hand-key{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-top:24px}.hand-key span{align-items:center;color:var(--ink);display:inline-flex;font-size:.83rem;font-weight:750;gap:7px}.hand-key i{border-radius:2px;display:block;height:4px;width:23px}.hour-key{background:var(--red)}.minute-key{background:var(--blue)}.clock-console{display:flex;flex-direction:column;min-width:0;padding:28px}.console-label,.card-label{color:var(--muted);display:block;font-size:.72rem;font-weight:800;margin-bottom:7px;text-transform:uppercase}.time-readout{align-items:end;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;padding-bottom:18px}.digital-display{color:var(--ink);font-family:var(--font-number);font-size:2.9rem;font-variant-numeric:tabular-nums;font-weight:800;line-height:1}.expressions-container{contain:layout paint;height:228px;overflow-y:auto;overscroll-behavior:contain;padding:18px 0;scrollbar-gutter:stable;width:100%}.expression-card{height:100%}.card-text{color:var(--ink-soft);display:grid;font-family:var(--font-display);font-size:.95rem;grid-template-rows:repeat(5,minmax(38px,auto));line-height:1.35}.line-item{border-bottom:1px solid var(--line);display:block;min-height:38px;padding:9px 0 7px}.line-item:last-child{border-bottom:0}.line-item.is-empty{border-color:transparent;visibility:hidden}.line-item strong{color:var(--ink);font-family:var(--font-number);font-size:1rem;font-variant-numeric:tabular-nums}.highlight{color:var(--red-dark);font-weight:800}.controls-wrapper{border-top:1px solid var(--line-strong);display:grid;gap:14px 12px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:auto;padding-top:18px}.control-group{min-width:0}.control-group-wide{grid-column:1 / -1}.group-label{color:var(--ink-soft);display:block;font-size:.78rem;font-weight:750;margin-bottom:8px}.btn-container{border:1px solid var(--line-strong);border-radius:2px;display:flex;min-height:44px;overflow:hidden}.toggle-btn{background:transparent;border:0;border-right:1px solid var(--line);color:var(--ink-soft);cursor:pointer;flex:1;font-size:.78rem;font-weight:750;min-height:44px;min-width:0;padding:7px 9px;transition:background-color .15s ease,color .15s ease}.toggle-btn:last-child{border-right:0}.toggle-btn:hover{background:var(--surface-soft)}.toggle-btn.active{background:var(--ink);color:#fff}.demo-size-stepper{align-items:stretch}.demo-size-button{background:transparent;border:0;color:var(--ink);flex:0 0 44px;font-family:var(--font-number);font-size:1.1rem;font-weight:800;min-height:44px}.demo-size-button:first-child{border-right:1px solid var(--line)}.demo-size-button:last-child{border-left:1px solid var(--line)}.demo-size-button:hover:not(:disabled){background:var(--surface-soft)}.demo-size-button:disabled{color:var(--line-strong);cursor:not-allowed}.demo-size-output{align-items:center;display:flex;flex:1;font-family:var(--font-number);font-size:.76rem;font-variant-numeric:tabular-nums;font-weight:800;justify-content:center;min-width:58px}.learning-route{border-bottom:1px solid var(--line-strong);border-top:1px solid var(--line-strong);display:grid;gap:38px;grid-template-columns:minmax(220px,.72fr) minmax(0,1.8fr);margin-top:32px;padding:35px 0 38px}.route-heading h2{font-size:1.55rem;margin:0;max-width:260px}.route-all-link{display:inline-block;font-size:.84rem;font-weight:800;margin-top:13px}.route-list{display:grid;gap:0;grid-template-columns:repeat(3,minmax(0,1fr));list-style:none;margin:0;padding:0}.route-list li{border-left:1px solid var(--line);display:grid;gap:14px;grid-template-columns:auto minmax(0,1fr);padding:3px 20px}.route-number{color:var(--red-dark);font-family:var(--font-number);font-size:.78rem;font-weight:800}.route-list strong{color:var(--muted);display:block;font-size:.72rem;margin-bottom:5px;text-transform:uppercase}.route-list a{color:var(--ink);font-family:var(--font-display);font-size:.98rem;font-weight:600;line-height:1.35;text-decoration-color:var(--yellow);text-decoration-thickness:3px}.route-links{display:flex;flex-direction:column;gap:6px;margin-top:10px}.route-links a{font-family:var(--font-body);font-size:.84rem;font-weight:700;line-height:1.35}.learning-guide{color:var(--ink-soft);margin:82px auto 0;max-width:980px;text-align:left}.guide-intro{align-items:start;display:grid;gap:40px;grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr);margin-bottom:62px}.guide-intro .eyebrow{grid-column:1 / -1;margin-bottom:-24px}.guide-intro h2{font-size:2.45rem;margin:0}.guide-intro p{margin:0 0 14px}.learning-guide>h2{font-size:1.75rem;margin:44px 0 8px}.learning-guide>h2:first-of-type{margin-top:0}.learning-guide>p{margin:0}.guide-grid{display:grid;gap:24px;grid-template-columns:repeat(3,minmax(0,1fr));margin:26px 0 54px}.guide-panel{border-top:5px solid var(--yellow);padding:18px 8px 0 0}.guide-panel:nth-child(2){border-top-color:var(--green)}.guide-panel:nth-child(3){border-top-color:var(--red)}.guide-panel img{display:block;height:auto;margin:0 0 14px;width:min(100%,220px)}.guide-panel h3{margin:0 0 9px}.guide-panel p{margin:0}.guide-bullets{margin:14px 0 38px;padding-left:22px}.guide-bullets li{margin:7px 0}.example-list{border-top:1px solid var(--line-strong);list-style:none;margin:18px 0 50px;padding:0}.example-list li{align-items:start;border-bottom:1px solid var(--line);display:grid;gap:20px;grid-template-columns:86px minmax(0,1fr);padding:14px 2px}.example-list strong{color:var(--red-dark);font-family:var(--font-number);font-size:1rem;font-variant-numeric:tabular-nums}.next-steps{background:var(--ink);color:#fff;margin-top:58px;padding:34px}.next-step-label{color:var(--study-surface);font-size:.72rem;font-weight:800;text-transform:uppercase}.next-steps h2{color:#fff;font-size:1.65rem;margin:9px 0 8px}.next-steps p{color:#d9e8e4;margin:0;max-width:720px}.faq-block{margin-top:64px}.faq-item{border-bottom:1px solid var(--line);padding:16px 2px}.faq-item:first-of-type{border-top:1px solid var(--line-strong)}.faq-item h3{font-size:1.08rem;margin:0 0 8px}.faq-item p{margin:0;max-width:760px}.guide-links{display:grid;gap:10px;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:22px}.guide-links a{align-items:center;border:1px solid rgba(255,255,255,.4);color:#fff;display:flex;font-size:.88rem;font-weight:750;min-height:50px;padding:10px 12px;text-decoration:none}.guide-links a:hover{background:#fff;color:var(--ink)}body.presentation-mode{overflow:hidden}body.presentation-mode .navbar,body.presentation-mode .site-footer,body.presentation-mode .clock-intro,body.presentation-mode .learning-route,body.presentation-mode .learning-guide{display:none!important}body.presentation-mode main.learn-container{height:100dvh;margin:0;max-width:none;padding:0;width:100vw}body.presentation-mode .clock-hero{display:flex;flex:1 1 auto;min-height:0}body.presentation-mode .clock-studio{border:0;box-shadow:none;flex:1 1 auto;grid-template-columns:minmax(0,1.4fr) minmax(430px,.6fr);height:auto;margin:0;min-height:0}body.presentation-mode .clock-stage{font-size:var(--demo-text-size);border-right:1px solid var(--ink);min-height:100%}body.presentation-mode #clockCanvas{height:min(68dvh,50vw,820px);width:min(68dvh,50vw,820px)}body.presentation-mode .clock-console{font-size:var(--demo-text-size);min-height:0;overflow-y:auto;padding:28px}body.presentation-mode .digital-display{font-size:3.6em}body.presentation-mode .console-label,body.presentation-mode .card-label{font-size:.68em}body.presentation-mode .card-text{font-size:.95em}body.presentation-mode .line-item strong{font-size:1.05em}body.presentation-mode .expressions-container{height:min(38dvh,340px)}body.presentation-mode .group-label,body.presentation-mode .toggle-btn,body.presentation-mode .demo-size-output,body.presentation-mode .clock-task span,body.presentation-mode .hand-key span{font-size:.68em}body.presentation-mode .clock-task strong{font-size:.95em}@media(max-width:900px){.clock-intro{gap:20px;grid-template-columns:1fr}.clock-studio{grid-template-columns:minmax(350px,1fr) minmax(300px,.86fr)}.clock-stage,.clock-console{padding:28px}.digital-display{font-size:2.6rem}.learning-route{grid-template-columns:1fr}.route-heading h2{max-width:480px}}@media(max-width:720px){.learn-container{padding:34px 18px 62px}.clock-intro .page-lead{font-size:1.08rem}.clock-studio{grid-template-columns:1fr;margin-top:26px}.clock-stage{border-bottom:1px solid var(--line-strong);border-right:0;min-height:430px;padding:72px 18px 30px}.clock-wrapper{box-shadow:8px 9px #20272529;padding:8px}#clockCanvas{height:min(300px,76vw);width:min(300px,76vw)}.hand-key{margin-top:26px}.clock-console{padding:28px 22px}.expressions-container{height:228px}.controls-wrapper{grid-template-columns:1fr}.control-group-wide{grid-column:auto}.learning-route{gap:24px;margin-top:48px}.route-list{grid-template-columns:1fr}.route-list li{border-left:0;border-top:1px solid var(--line);padding:16px 2px}.guide-intro{gap:18px;grid-template-columns:1fr;margin-bottom:48px}.guide-intro .eyebrow{grid-column:auto;margin-bottom:0}.guide-intro h2{font-size:2rem}.guide-grid,.guide-links{grid-template-columns:1fr}.example-list li{gap:12px;grid-template-columns:66px minmax(0,1fr)}.next-steps{margin-left:-18px;margin-right:-18px;padding:28px 18px}body.presentation-mode .clock-studio{height:100dvh;grid-template-columns:1fr;grid-template-rows:minmax(0,56dvh) minmax(0,44dvh);min-height:0;overflow-y:auto}body.presentation-mode .clock-stage{min-height:0;padding:52px 18px 18px}body.presentation-mode .clock-console{min-height:0;overflow-y:auto;padding:22px}body.presentation-mode #clockCanvas{height:min(40dvh,72vw);width:min(40dvh,72vw)}body.presentation-mode .hand-key{margin-top:12px}}