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24px}.course-hero__badge{background:var(--course-accent);color:#fff;min-width:36px;height:36px;font-family:var(--font-display), serif;border-radius:999px;justify-content:center;align-items:center;margin-bottom:12px;padding:0 10px;font-weight:700;display:inline-flex}.course-hero h1{font-family:var(--font-display), serif;margin:0 0 10px;font-size:clamp(1.7rem,4vw,2.2rem)}.course-hero p{color:var(--ink-soft);max-width:58ch;margin:0;line-height:1.6}.course-hero__meta{font-weight:700;color:var(--ink)!important;margin-top:12px!important}.course-lessons-section{padding-top:28px}.lesson-grid--course{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-card--course{gap:4px}.lesson-card__start{align-self:flex-start;min-height:44px;margin-top:auto}.course-detail-nav{padding:8px 0 40px}.section-head--group{align-items:center;gap:16px;max-width:760px;margin-bottom:20px;display:flex}.section-badge{width:42px;height:42px;font-family:var(--font-display), serif;color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:inline-flex}.lesson-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;display:grid}.lesson-card{background:var(--surface);border:1px solid var(--border);border-top:4px solid var(--teal);border-radius:var(--r-lg);box-shadow:var(--shadow-card);flex-direction:column;padding:24px;display:flex}.lesson-top{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.lesson-icon{border-radius:10px;justify-content:center;align-items:center;width:42px;height:42px;font-size:1rem;display:flex}.lesson-icon.c-purple{background:var(--teal-tint);color:var(--teal)}.lesson-icon.c-amber{background:var(--amber-tint);color:var(--amber)}.lesson-icon.c-green{background:var(--green-tint);color:var(--green)}.step-count{color:var(--ink-faint);background:var(--paper);border:1px solid var(--border);border-radius:999px;padding:5px 10px;font-size:.78rem;font-weight:700}.lesson-card h3{font-family:var(--font-display), serif;margin:0 0 8px;font-size:1.15rem;font-weight:700}.lesson-card p{color:var(--ink-soft);flex-grow:1;margin:0 0 18px;font-size:.95rem;line-height:1.55}.lesson-card .btn-text{align-self:flex-start;min-height:44px;padding:10px 0}.how-list{gap:16px;max-width:640px;display:grid}.how-list li{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:18px 20px}.how-list strong{font-family:var(--font-display), serif;margin-bottom:4px;font-size:1.05rem;display:block}.how-list span{color:var(--ink-soft);font-size:.95rem}.about-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);max-width:720px;padding:28px 32px}.about-panel h2{font-family:var(--font-display), serif;margin:0 0 10px;font-size:1.35rem}.about-panel p{color:var(--ink-soft);line-height:1.65}.lesson-main{flex:1;padding:32px 0 64px}.lesson-player{overscroll-behavior:contain;flex-direction:column;flex:1;min-height:0;max-height:calc(100dvh - 56px);padding:28px 0 20px;display:flex;overflow-y:auto}.lesson-player__header{border-bottom:1px solid var(--border);flex-shrink:0;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:12px;display:flex}.lesson-player__back{border:1px solid var(--border);background:var(--surface);min-height:36px;color:var(--ink-soft);border-radius:8px;flex-shrink:0;align-items:center;gap:6px;padding:6px 10px;font-size:.85rem;font-weight:700;display:inline-flex}.lesson-player__back:hover{border-color:var(--teal);color:var(--teal)}.lesson-player__lesson{min-width:0;font-family:var(--font-display), serif;color:var(--ink);text-overflow:ellipsis;white-space:nowrap;flex:1;margin:0;font-size:1rem;font-weight:700;overflow:hidden}.lesson-player__help{background:var(--teal-tint);width:36px;height:36px;color:var(--teal-dark);border:1px solid #0f766e26;border-radius:999px;flex-shrink:0;font-size:1rem;font-weight:800}.lesson-player__help.is-open,.lesson-player__help:hover{background:#d9ece8}.lesson-player__progress{background:var(--teal-tint);border-radius:999px;flex-shrink:0;height:5px;margin-bottom:8px;overflow:hidden}.lesson-player__hint{background:var(--teal-tint);border:1px solid var(--border);border-radius:var(--r-md);color:var(--ink-soft);flex-shrink:0;margin-bottom:8px;padding:8px 12px;font-size:.88rem;line-height:1.45}.lesson-player__hint-list{margin:0;padding-left:1.1rem}.lesson-player__hint-list li+li{margin-top:4px}.lesson-player__body{flex-direction:column;flex:none;gap:14px;display:flex}.lesson-player__practice{overscroll-behavior:contain;-webkit-overflow-scrolling:touch;background:var(--paper);border:1px solid var(--border);border-radius:var(--r-md);flex:none;width:100%;max-height:min(480px,100dvh - 260px);padding:10px 8px;overflow-y:auto}.lesson-player__instruction{font-family:var(--font-display), serif;color:var(--ink);flex-shrink:0;margin:0;font-size:clamp(1rem,2.4vw,1.15rem);font-weight:700;line-height:1.35}.lesson-player__steps{flex-shrink:0;gap:6px;margin:0;padding:0;list-style:none;display:grid}.lesson-player__steps li{color:var(--ink);font-size:.98rem;font-weight:600;line-height:1.4}.lesson-player__footer{border-top:1px solid var(--border);background:var(--paper);flex-direction:column;flex:none;gap:8px;margin-top:12px;padding-top:12px;display:flex}.lesson-player__feedback{min-height:1.35rem}.lesson-player__feedback .feedback-inline{margin:0}.lesson-player__footer .step-nav-actions{width:100%}.lesson-player__footer .step-nav-actions .btn{flex:1;justify-content:center}.site--in-lesson{min-height:100dvh}.site--in-lesson>header{flex-shrink:0}.site--in-lesson>header .header-inner{min-height:56px}.site--in-lesson>.lesson-player{flex:1;min-height:0}.lesson-header{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);margin-bottom:18px;padding:22px 24px 24px}.back-link{color:var(--ink-soft);align-items:center;gap:8px;margin-bottom:18px;font-size:.92rem;font-weight:700;transition:color .15s;display:inline-flex}.back-link:hover{color:var(--teal)}.lesson-header-top{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;display:flex}.lesson-tag{letter-spacing:.06em;text-transform:uppercase;color:var(--teal);margin:0 0 6px;font-size:.78rem;font-weight:700}.lesson-header-top h1{font-family:var(--font-display), serif;margin:0;font-size:clamp(1.35rem,3vw,1.75rem);font-weight:700}.help-btn{background:var(--teal-tint);color:var(--teal-dark);border:1px solid #0f766e26}.help-btn:hover{background:#d9ece8}.progress-track{background:var(--teal-tint);border-radius:999px;height:8px;overflow:hidden}.progress-fill{background:var(--teal);border-radius:999px;height:100%;transition:width .35s}.help-panel{background:var(--teal-tint);border:1px solid var(--border);border-radius:var(--r-md);color:var(--ink-soft);margin-top:16px;padding:14px 16px;font-size:.95rem;line-height:1.55;display:none}.help-panel.open{display:block}.step-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card);padding:28px 24px}.step-card h2{font-family:var(--font-display), serif;margin:0 0 22px;font-size:clamp(1.25rem,3vw,1.55rem);font-weight:700;line-height:1.35}.practice-area{background:var(--paper);border:1.5px dashed var(--border);border-radius:var(--r-md);min-height:140px;padding:24px 16px}.lesson-player__practice .task-panel{max-width:none;box-shadow:none;background:0 0;border:none;margin:0;padding:10px}.lesson-player__practice .email-app,.lesson-player__practice .browser-window{max-width:none}.feedback-inline{color:var(--green);margin:14px 0 0;font-size:.95rem;font-weight:600}.feedback-inline-error{color:var(--error)}.is-success.task-button{background:var(--green-tint);color:var(--green);border:1.5px solid #2f855a59}.is-success.task-button.secondary,.is-success.task-button.warn{background:var(--green-tint);color:var(--green)}.is-success.task-input{background:var(--green-tint);border-color:#2f855a73}.is-success.task-option,.is-success.drag-item,.is-success.drop-zone,.is-success.upload-label{background:var(--green-tint);color:var(--green);border-color:#2f855a73}.task-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);width:100%;max-width:640px;margin:0 auto;padding:18px}.feedback-banner{border-radius:var(--r-md);border:1px solid #0000;align-items:center;gap:8px;margin-top:18px;padding:12px 14px;font-weight:700;display:flex}.feedback-banner.success{background:var(--green-tint);color:#276749;border-color:#2f855a40}.feedback-banner.error{background:var(--error-tint);color:var(--error);border-color:#9b2c2c33}.step-footer{border-top:1px solid var(--border);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:24px;padding-top:20px;display:flex}.step-progress-text{color:var(--ink-faint);font-size:.9rem;font-weight:700}.step-nav-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.task-list{gap:10px;display:grid}.task-option{text-align:left;border:1.5px solid var(--border);background:var(--surface);width:100%;color:var(--ink);border-radius:10px;padding:14px 16px;font-size:1rem;font-weight:700;transition:border-color .15s,background .15s}.task-option:hover{border-color:var(--teal);background:var(--teal-tint)}.task-option.is-selected{border-color:var(--teal);background:var(--teal-tint);color:var(--teal-dark)}.task-input{border:1.5px solid var(--border);background:var(--surface);width:100%;color:var(--ink);border-radius:10px;padding:14px 16px;font-size:1.05rem;transition:border-color .15s}.task-input:focus{border-color:var(--teal);outline:none;box-shadow:0 0 0 3px #0f766e1a}.task-button{background:var(--teal);color:#fff;border:none;border-radius:10px;justify-content:center;align-items:center;padding:12px 18px;font-size:.95rem;font-weight:700;transition:background .15s;display:inline-flex}.task-button:hover{background:var(--teal-dark)}.task-button.secondary{background:var(--teal-tint);color:var(--teal-dark)}.task-button.secondary:hover{background:#d9ece8}.task-button.warn{background:var(--amber-tint);color:#8b5a1f}.task-button.warn:hover{background:#f3e4c8}.task-button:disabled{opacity:.45;cursor:not-allowed}.btn-compact{padding:10px 14px;font-size:.9rem}.file-row{border:1px solid var(--border);background:var(--surface);border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;display:flex}.drag-item,.drop-zone{text-align:center;border-radius:10px;justify-content:center;align-items:center;min-height:100px;padding:16px;font-weight:700;display:flex}.drag-item{cursor:grab;border:2px dashed var(--teal);background:var(--teal-tint);color:var(--teal-dark)}.drop-zone{border:2px dashed var(--border);background:var(--paper);color:var(--ink-soft)}.drop-zone.is-ready{border-color:var(--green);background:var(--green-tint);color:var(--green)}.scroll-practice{max-height:220px;padding-right:8px;overflow-y:auto}.scroll-note,.scroll-filler{color:var(--ink-soft);margin-bottom:12px}.scroll-practice--treasure{background:linear-gradient(#fff8e7 0%,#fef3c7 100%);border-radius:10px;padding:12px}.drag-item--play{color:#9d174d;background:#fdf2f8;border-color:#f472b6;flex-direction:column;gap:8px;font-size:1.05rem}.drag-item__emoji{font-size:2.4rem;line-height:1}.drop-zone--play{color:#6b21a8;background:#faf5ff;border-color:#c084fc}.task-panel--play-drop{place-items:center;gap:24px;padding:8px 0;display:grid}@media (min-width:640px){.task-panel--play-drop{grid-template-columns:1fr 1fr;gap:28px}}.drag-item--toy{border-radius:16px;width:min(100%,160px);min-height:130px;box-shadow:0 8px 20px #9d174d1f}.drag-item__name{font-weight:700}.drop-zone--play-target{background:0 0;border:none;justify-content:center;align-items:center;width:min(100%,200px);min-height:170px;padding:0;display:flex}.drop-zone--play-target.is-ready .play-drop__box-inner,.drop-zone--play-target.is-ready .play-drop__basket-body,.drop-zone--play-target.is-ready .play-drop__pot-soil{background:var(--green)}@supports (color:color-mix(in lab, red, red)){.drop-zone--play-target.is-ready .play-drop__box-inner,.drop-zone--play-target.is-ready .play-drop__basket-body,.drop-zone--play-target.is-ready .play-drop__pot-soil{background:color-mix(in srgb, var(--green) 18%, white)}}.drop-zone--play-target.is-success .play-drop__label{color:var(--green)}.play-drop{pointer-events:none;flex-direction:column;align-items:center;gap:10px;display:flex}.play-drop__label{color:var(--ink-soft);margin:0;font-size:.95rem;font-weight:700}.play-drop__box-scene{width:150px;height:118px;position:relative}.play-drop__box-flap{background:linear-gradient(#e8c9a0 0%,#d4a574 100%);border:1px solid #b8895a;position:absolute}.play-drop__box-flap--back{transform-origin:bottom;border-radius:2px 2px 0 0;width:106px;height:28px;top:8px;left:22px;transform:perspective(200px)rotateX(52deg)}.play-drop__box-flap--left{transform-origin:100% 100%;width:52px;height:24px;top:18px;left:8px;transform:perspective(200px)rotateY(-48deg)rotateX(18deg)}.play-drop__box-flap--right{transform-origin:0 100%;width:52px;height:24px;top:18px;right:8px;transform:perspective(200px)rotateY(48deg)rotateX(18deg)}.play-drop__box-inner{background:#c99862;border:1px solid #a0724a;width:102px;height:34px;position:absolute;bottom:34px;left:24px;box-shadow:inset 0 8px 14px #0000002e}.play-drop__box-panel--front{background:linear-gradient(#ddb882 0%,#c99862 55%,#b8895a 100%);border:1px solid #a0724a;border-radius:0 0 3px 3px;width:102px;height:68px;position:absolute;bottom:0;left:24px;box-shadow:inset 0 -10px #00000014}.play-drop__box-panel--side{clip-path:polygon(100% 0,100% 100%,0 100%,38% 0);background:linear-gradient(90deg,#a0724a 0%,#b8895a 100%);border:1px solid #8f6238;width:28px;height:68px;position:absolute;bottom:0;left:0;transform:skewY(0)}.play-drop__box-panel--bottom{filter:blur(6px);background:#0000001f;border-radius:50%;width:126px;height:18px;position:absolute;bottom:-6px;left:12px}.play-drop__basket{width:118px;height:98px;position:relative}.play-drop__basket-handle{border:4px solid #a0724a;border-bottom:none;border-radius:58px 58px 0 0;width:58px;height:34px;position:absolute;top:0;left:50%;transform:translate(-50%)}.play-drop__basket-rim{z-index:2;background:linear-gradient(#c99862 0%,#b8895a 100%);border:1px solid #8f6238;border-radius:4px;width:100%;height:14px;position:absolute;top:28px;left:0}.play-drop__basket-body{background:linear-gradient(#ddb882 0%,#c99862 100%);border:1px solid #a0724a;border-radius:0 0 14px 14px;width:106px;height:56px;position:absolute;top:38px;left:6px;overflow:hidden;box-shadow:inset 0 -8px #00000014}.play-drop__basket-line{background:#8f623859;border-radius:999px;height:3px;margin:10px 8px 0;display:block}.play-drop__pot{width:108px;height:96px;position:relative}.play-drop__pot-rim{z-index:2;background:#b45309;border-radius:4px;width:100px;height:14px;position:absolute;top:18px;left:4px}.play-drop__pot-body{clip-path:polygon(8% 0,92% 0,100% 100%,0 100%);background:linear-gradient(#ea580c 0%,#c2410c 100%);border-radius:0 0 8px 8px;width:80px;height:58px;position:absolute;top:28px;left:14px}.play-drop__pot-soil{z-index:1;background:#5c4033;border-radius:50%;width:88px;height:18px;position:absolute;top:24px;left:10px;box-shadow:inset 0 3px #ffffff14}.play-balloon{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;background:0 0;border:none;flex-direction:column;justify-content:flex-end;align-items:center;width:120px;height:180px;padding:0;transition:transform .2s;display:flex;position:relative}.play-balloon:hover:not(.is-popped){transform:translateY(-4px)}.play-balloon__body{background:radial-gradient(circle at 32% 28%, #ffffff8c, transparent 42%), var(--balloon-color);border-radius:50%/55% 55% 45% 45%;width:88px;height:108px;transition:transform .25s,opacity .25s;box-shadow:inset -8px -10px 18px #0000001f}.play-balloon__shine{pointer-events:none;background:#ffffff73;border-radius:50%;width:18px;height:28px;position:absolute;top:34px;left:calc(50% - 18px);transform:rotate(-18deg)}.play-balloon__string{background:#94a3b8;width:2px;height:52px;margin-top:-2px;transition:opacity .2s}.play-balloon__pop{font-family:var(--font-display), serif;color:var(--teal-dark);font-size:1.6rem;font-weight:700;animation:.35s play-pop;position:absolute;top:42px}.play-balloon.is-popped .play-balloon__body{opacity:0;transform:scale(.2)}.play-balloon.is-popped .play-balloon__string,.play-balloon.is-popped .play-balloon__shine{opacity:0}.play-gift{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;background:0 0;border:none;justify-content:center;align-items:center;width:130px;height:130px;padding:0;display:flex;position:relative}.play-gift__box,.play-gift__lid{background:var(--gift-color);border-radius:6px;transition:transform .35s,opacity .35s;position:absolute;left:50%;transform:translate(-50%)}.play-gift__box{width:96px;height:72px;bottom:8px;box-shadow:inset 0 -8px #0000001f}.play-gift__lid{width:104px;height:28px;bottom:72px;box-shadow:inset 0 4px #ffffff2e}.play-gift__ribbon-v,.play-gift__ribbon-h{pointer-events:none;z-index:1;background:#fde68a;position:absolute}.play-gift__ribbon-v{width:14px;height:92px;bottom:8px;left:50%;transform:translate(-50%)}.play-gift__ribbon-h{width:104px;height:14px;bottom:44px;left:50%;transform:translate(-50%)}.play-gift__bow{z-index:2;font-size:1.6rem;transition:transform .35s,opacity .35s;position:absolute;top:18px}.play-gift__surprise{z-index:3;font-size:2rem;animation:.45s play-pop;position:absolute;top:-8px}.play-gift.is-open .play-gift__lid{opacity:.85;transform:translate(-50%)translateY(-36px)rotate(-12deg)}.play-gift.is-open .play-gift__bow{opacity:.7;transform:translateY(-18px)}.play-star{cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;background:radial-gradient(circle,#fef08a 0%,#fde047 55%,#facc15 100%);border:none;border-radius:50%;justify-content:center;align-items:center;width:96px;min-width:44px;height:96px;min-height:44px;padding:0;transition:transform .2s;display:inline-flex;box-shadow:0 8px 20px #facc1559}.play-star:hover{transform:scale(1.06)}.play-star__icon{filter:drop-shadow(0 2px 2px #0000001f);font-size:2.8rem;line-height:1}.play-star.is-success{outline:3px solid #2f855a73}.play-star--scroll{margin-inline:auto;display:flex}@keyframes play-pop{0%{opacity:0;transform:scale(.4)}70%{opacity:1;transform:scale(1.15)}to{opacity:1;transform:scale(1)}}@media (prefers-reduced-motion:reduce){.play-balloon,.play-gift__box,.play-gift__lid,.play-gift__bow,.play-star{transition:none}.play-balloon__pop,.play-gift__surprise{animation:none}}.task-hint-inline{color:var(--ink-soft);font-size:.9rem}.browser-window{border:1px solid var(--border);background:var(--paper);border-radius:10px;overflow:hidden}.browser-bar{background:var(--surface);border-bottom:1px solid var(--border);align-items:center;gap:8px;padding:10px 14px;display:flex}.browser-dot{background:#cbd2d9;border-radius:50%;width:9px;height:9px}.browser-address{background:var(--paper);border:1px solid var(--border);color:var(--ink-soft);border-radius:999px;flex:1;margin-left:6px;padding:8px 12px;font-size:.9rem}.browser-toolbar{flex-wrap:wrap;gap:10px;display:flex}.browser-page-label{color:var(--ink-soft);font-weight:700}.email-app{background:var(--surface);border:.5px solid var(--border);border-radius:12px;width:100%;max-width:720px;margin:0 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