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20px;border-radius:14px;cursor:pointer;font-weight:800}.demo-back{border:1px solid var(--line);background:white;color:var(--ink)}.demo-done{border:0;background:var(--olive);color:white}.activity-picker{width:min(720px,100%);max-height:calc(100vh - 48px);overflow:auto;border:1px solid var(--line);border-radius:30px;background:var(--surface);box-shadow:0 24px 80px rgba(15,19,22,.3)}.activity-picker-backdrop{align-items:start;padding-top:98px;overflow-y:auto}.activity-picker-backdrop .activity-picker{max-height:calc(100vh - 122px);max-height:calc(100dvh - 122px)}.activity-picker-header{padding:26px 28px 22px}.lesson-setup{padding:0 28px 22px}.setup-heading{margin-bottom:12px;display:flex;align-items:center;justify-content:space-between;gap:16px}.setup-heading>div{display:flex;align-items:baseline;gap:9px}.setup-heading strong{font-size:17px}.setup-heading span{color:var(--muted);font-size:13px}.setup-heading button{padding:7px 11px;border:1px solid var(--line);border-radius:10px;background:white;color:var(--olive-dark);cursor:pointer;font-size:12px;font-weight:800}.verb-selector{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.verb-choice{min-height:56px;padding:8px 10px;display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:9px;border:1px solid var(--line);border-radius:14px;background:white;cursor:pointer}.verb-choice.is-selected{border-color:var(--sage);background:#f2e2c5}.verb-choice input{width:18px;height:18px;accent-color:var(--olive);cursor:pointer}.verb-choice-dot{width:10px;height:10px;border-radius:50%}.verb-choice>span:last-child{min-width:0;display:flex;flex-direction:column;gap:2px}.verb-choice strong{font-size:14px}.verb-choice small,.verb-choice strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.verb-choice small{color:var(--muted);font-size:11px}.lesson-length-block{margin-top:12px}.lesson-length-heading{margin-bottom:8px;display:flex;align-items:baseline;justify-content:space-between;gap:14px}.lesson-length-heading strong{font-size:14px}.lesson-length-heading small{color:var(--muted);font-size:11px}.lesson-length-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.lesson-length-options button{min-height:64px;padding:10px 12px;display:flex;align-items:flex-start;flex-direction:column;justify-content:center;gap:3px;border:1px solid var(--line);border-radius:14px;background:white;color:var(--ink);cursor:pointer;text-align:left;transition:border-color .18s ease,background .18s ease,transform .18s ease}.lesson-length-options button:hover{transform:translateY(-1px);border-color:var(--sage)}.lesson-length-options button.is-active{border-color:var(--olive);background:var(--olive);color:white}.lesson-length-options strong{font-size:13px}.lesson-length-options span{color:var(--muted);font-size:10px}.lesson-length-options button.is-active span{color:rgba(255,255,255,.78)}.lesson-order-row{min-height:68px;margin-top:12px;padding:10px 12px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-radius:15px;background:#f4eee2}.lesson-order-row>span{display:flex;flex-direction:column;gap:3px}.lesson-order-row strong{font-size:14px}.lesson-order-row small{color:var(--muted);font-size:11px}.order-switch{padding:3px;display:flex;border-radius:12px;background:white}.order-switch button{min-width:94px;height:36px;padding:0 12px;border:0;border-radius:9px;background:transparent;color:var(--muted);cursor:pointer;font-size:11px;font-weight:900}.order-switch button.is-active{background:var(--olive);color:white}.difficulty-row{min-height:68px;margin-top:12px;padding:10px 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ease,box-shadow .18s ease}.activity-option:hover{transform:translateY(-2px);border-color:var(--sage);box-shadow:0 12px 28px rgba(41,46,36,.09)}.activity-option:disabled{cursor:default;opacity:.42;transform:none;box-shadow:none}.activity-option.is-locked{opacity:.72}.activity-option-quiz{background:#f1ddba}.activity-option-speak{background:#e4e8d2}.activity-icon{width:58px;height:58px;display:grid;place-items:center;border-radius:18px;background:var(--olive);color:white;font-size:24px;font-weight:900}.activity-option>span:nth-child(2){display:flex;flex-direction:column;gap:6px}.activity-option strong{font-size:20px}.activity-option small{color:var(--muted);font-size:14px;line-height:1.4}.activity-arrow{color:var(--olive);font-size:28px;font-weight:800}.activity-lock-label{padding:8px 11px;border:1px solid rgba(45,72,40,.2);border-radius:999px;background:rgba(255,255,255,.58);color:var(--olive);font-size:11px;font-weight:850;line-height:1.1;text-align:center;white-space:nowrap}.video-dialog{position:relative;width:min(900px,100%);max-height:calc(100vh - 48px);overflow:auto;border-radius:28px;background:white;box-shadow:0 24px 80px rgba(15,19,22,.34)}.video-close-button{position:absolute;z-index:3;top:14px;right:14px;background:rgba(255,255,255,.9);box-shadow:0 6px 18px rgba(15,19,22,.18);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.dialog-header{padding:21px 24px 17px;display:flex;align-items:center;justify-content:space-between}.dialog-header p{margin:0 0 2px;color:var(--muted);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.dialog-header 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