:root{font-family:"Malgun Gothic","Apple SD Gothic Neo",system-ui,sans-serif;color:#162848;background:#f4f7fc;font-synthesis:none;--blue:#2463df;--dark:#162848;--muted:#60718c;--line:#dde5f1;--orange:#bd5807;--green:#18795c}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #ec9418;outline-offset:4px}button{min-height:46px;border:1px solid var(--line);background:white;color:var(--dark);border-radius:13px;padding:10px 18px;font-weight:700;transition:background .15s,transform .15s}button:hover:not(:disabled){background:#edf3ff}button:active:not(:disabled){transform:translateY(1px)}.primary{background:var(--blue);color:white;border-color:var(--blue)}.primary:hover:not(:disabled){background:#184fbf}.header{max-width:1420px;padding:22px 34px;margin:auto;display:flex;gap:30px;align-items:center;border-bottom:1px solid var(--line)}.brand{text-decoration:none;color:var(--dark);font-size:23px;font-weight:900;display:flex;gap:12px;align-items:center;white-space:nowrap}.brand small{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-top:2px;letter-spacing:2px}.brand-clock{background:var(--blue);color:white;width:47px;height:47px;border-radius:16px;font-size:37px;text-align:center;line-height:43px}.header nav{display:flex;gap:4px;flex:1;justify-content:center}.header nav button{border:0;background:transparent;color:var(--muted);font-size:15px;padding:12px 16px}.header nav button.active{color:var(--blue);background:#e7efff}.sound{font-size:14px;white-space:nowrap}main{max-width:1290px;padding:30px 32px 40px;margin:auto}.page-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:26px}.eyebrow{color:var(--blue);font-size:13px;font-weight:800;letter-spacing:1px;margin:0 0 7px}h1{font-size:29px;letter-spacing:-1px;line-height:1.4;margin:0}h2{font-size:24px;line-height:1.5;margin:0 0 12px}p{line-height:1.8}.muted{color:var(--muted)}.small{font-size:14px}.badge{display:inline-flex;align-items:center;background:#fff1be;color:#795409;padding:9px 15px;border-radius:30px;font-size:14px;font-weight:800;white-space:nowrap}.workspace{display:grid;grid-template-columns:220px minmax(0,1fr);gap:24px}.lessons{display:flex;flex-direction:column;gap:9px}.lesson{text-align:left;display:flex;align-items:center;gap:12px;background:transparent;border-color:transparent;padding:14px 10px;font-size:15px}.lesson.active{background:white;border-color:#b8cdf8;box-shadow:0 5px 16px #1b4c9410}.lesson-num{display:grid;place-items:center;width:32px;height:32px;border-radius:11px;background:#e6ebf3;color:var(--muted);flex-shrink:0}.lesson.active .lesson-num{background:var(--blue);color:white}.lesson.complete .lesson-num{background:#d9f2e8;color:var(--green)}.lesson small{display:block;color:var(--muted);font-size:12px;font-weight:500;margin-top:3px}.side-note{font-size:13px;color:var(--muted);padding:12px;line-height:1.8}.lesson-body{background:white;border:1px solid var(--line);border-radius:25px;overflow:hidden;box-shadow:0 10px 30px #28457607}.activity-title{padding:22px 28px;border-bottom:1px solid var(--line);display:flex;gap:15px;align-items:center;justify-content:space-between}.activity-title h2{font-size:19px;margin:0}.step-label{font-size:13px;color:var(--muted);white-space:nowrap}.activity{display:grid;grid-template-columns:minmax(280px,1.1fr) minmax(280px,1fr)}.clock-area{padding:25px 24px;text-align:center;background:radial-gradient(#ccdaf0 1px,transparent 1px) 0 0/18px 18px,#f7faff;min-width:0}.clock{width:100%;max-width:355px;height:auto;display:block;margin:auto;touch-action:none;user-select:none;overflow:visible}.clock.interactive{cursor:grab}.clock.interactive:active{cursor:grabbing}.clock .hour-hand{stroke:#c96717}.clock .minute-hand{stroke:#2463df}.clock.mono .hour-hand,.clock.mono .minute-hand{stroke:#162848}.clock-labels{display:flex;justify-content:center;gap:20px;font-size:13px;margin:10px 0 17px;color:var(--muted)}.key{display:inline-block;width:16px;height:5px;border-radius:5px;vertical-align:middle;margin-right:6px;background:#c96717}.key.minute{background:var(--blue)}.time-value{font-size:27px;font-weight:850;letter-spacing:-.7px;margin:12px 0 5px}.time-sub{font-size:15px;color:var(--blue);min-height:25px;font-weight:700}.clock-controls{display:flex;justify-content:center;gap:8px;margin-top:19px;flex-wrap:wrap}.clock-controls button{padding:9px 13px;font-size:14px}.coach{padding:32px 28px;display:flex;flex-direction:column;justify-content:center}.coach-tag{align-self:flex-start;font-size:13px;font-weight:800;background:#eaf1ff;color:var(--blue);padding:6px 10px;border-radius:8px;margin-bottom:20px}.coach p{font-size:18px;color:#445874;margin:3px 0 22px}.coach strong{color:var(--dark)}.callout{background:#f1f6ff;border-radius:14px;padding:17px 19px;color:#244c8d;font-size:16px;line-height:1.8;margin:5px 0 23px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.actions button{flex:1}.underbar{padding:19px 28px;border-top:1px solid var(--line);display:flex;align-items:center;gap:14px;justify-content:space-between;font-size:14px;color:var(--muted)}.dots{display:flex;gap:6px}.dot{width:8px;height:8px;border-radius:50%;background:#d9e2f1}.dot.on{background:var(--blue)}footer{max-width:1226px;margin:0 auto;padding:0 0 25px;display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.toolbar select{border:1px solid var(--line);padding:12px;border-radius:12px;background:white;max-width:100%}.panel{background:white;border:1px solid var(--line);border-radius:22px;padding:28px}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.answer-grid button{padding:15px 10px;min-height:61px;font-size:18px}.answer-fields{display:flex;gap:9px;align-items:center;flex-wrap:wrap;font-size:19px;margin:18px 0}.answer-fields select{padding:12px;font-size:24px;border:2px solid #c6d6f1;border-radius:12px;background:white;min-width:83px}.feedback{padding:15px 17px;border-radius:13px;line-height:1.8;margin:16px 0;background:#fff5d6;color:#72530d;font-size:16px}.feedback.correct{background:#e3f5ed;color:#176747}.feedback:empty{display:none}.quiz-progress{height:6px;background:#e7edf7;border-radius:10px;overflow:hidden;margin:18px 0 26px}.quiz-progress>div{height:100%;background:var(--blue)}.help-button{border:0;background:transparent;padding-left:0;color:#5b6d89;font-size:14px}.hinted{background:#fff5da}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}.stat{background:#f3f7ff;border-radius:16px;padding:22px}.stat strong{display:block;font-size:32px;margin:5px 0}.stat span{color:var(--muted);font-size:14px}.result-title{text-align:center;padding:20px}.result-title .medallion{width:75px;height:75px;display:grid;place-items:center;background:#ffedab;border-radius:26px;margin:0 auto 18px;font-size:36px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:14px}th,td{padding:15px 12px;border-bottom:1px solid var(--line);line-height:1.6}th{color:var(--muted);font-size:13px}td .pill{font-size:12px;padding:5px 8px;background:#eaf3ff;color:var(--blue);border-radius:6px}.setting{display:flex;gap:12px;align-items:flex-start;padding:20px 0;border-top:1px solid var(--line)}.setting input{width:22px;height:22px;accent-color:var(--blue);flex-shrink:0}.setting p{margin:4px 0;font-size:14px;color:var(--muted)}.timeline{border-top:1px solid var(--line);padding:20px 28px;background:#fcfdff}.timeline-track{position:relative;height:7px;background:#d7e4ff;border-radius:8px;margin:10px 8px 17px}.timeline-fill{height:100%;background:var(--blue);border-radius:8px}.timeline-point{position:absolute;top:-5px;width:17px;height:17px;background:var(--blue);border:3px solid white;box-shadow:0 0 0 1px var(--blue);border-radius:50%;transform:translateX(-50%)}.timeline-labels{display:flex;justify-content:space-between;font-size:13px;color:var(--muted)}.timeline-summary{text-align:center;font-size:14px;margin-top:13px;color:var(--muted)}.inline-controls{display:flex;gap:14px;flex-wrap:wrap;margin-top:15px;color:var(--muted);font-size:14px}.inline-controls label{display:flex;align-items:center;gap:5px}.inline-controls input{width:18px;height:18px;accent-color:var(--blue)}.wide-head{margin-bottom:20px}.empty{text-align:center;padding:45px 20px}.empty p{color:var(--muted)}.error-banner{background:#fff2d8;padding:12px 18px;border-radius:12px;color:#775214;margin-bottom:15px}.practice-levels{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.practice-levels button{font-size:14px}.practice-levels button.active{background:var(--blue);border-color:var(--blue);color:white}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@media(max-width:1000px){.header{gap:15px;padding:16px 24px;flex-wrap:wrap}.header nav{order:3;flex-basis:100%;justify-content:flex-start;overflow:auto}.sound{margin-left:auto}.workspace{grid-template-columns:180px minmax(0,1fr);gap:16px}.activity{grid-template-columns:1fr}.clock{max-width:310px}.coach{padding:25px}.clock-area{padding:18px}.coach-tag{margin-bottom:12px}.coach p{margin-bottom:15px}.page-head{margin-bottom:20px}footer{padding:0 24px 20px}}@media(max-width:600px){main{padding:22px 14px}.header{padding:15px}.header nav{gap:2px}.header nav button{font-size:13px;padding:10px;white-space:nowrap}.brand{font-size:21px}.page-head{align-items:flex-start}.page-head h1{font-size:24px}.badge{font-size:12px;padding:8px 11px}.workspace{display:block}.lessons{flex-direction:row;overflow:auto;gap:6px;margin-bottom:17px;padding-bottom:5px}.lesson{white-space:nowrap;flex-shrink:0;font-size:13px;padding:10px}.lesson small,.side-note{display:none}.lesson-num{width:27px;height:27px;font-size:12px}.activity-title{padding:17px}.activity-title h2{font-size:16px}.clock{max-width:285px}.coach{padding:24px 20px}.coach h2{font-size:23px}.coach p{font-size:17px}.underbar{padding:16px;font-size:12px}.stats{gap:8px}.stat{padding:14px 10px}.stat strong{font-size:26px}.stat span{font-size:12px}.panel{padding:20px}.timeline{padding:20px}.page-head .toolbar{width:100%}footer{display:block;line-height:1.9}footer span{display:block}.answer-fields select{min-width:75px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}@media print{.header,.actions,.sound,footer,.setting,.practice-levels{display:none}main{padding:0}.panel{border:0}}