:root{--text:#3a3226;--text-muted:#8a8272;--bg:#fff8ef;--card-bg:#fff;--primary:#ff9800;--primary-dark:#e07c00;--blue:#4a90d9;--success:#43a047;--warning:#f2a900;--danger:#e53935;--border:#f0e4d0;color:var(--text);background:var(--bg);-webkit-tap-highlight-color:transparent;font:18px/1.5 system-ui,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{overscroll-behavior:none;margin:0}#root{min-height:100svh}button{font:inherit;color:inherit}.page-center{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:12px;min-height:100svh;padding:24px;display:flex}.page{max-width:720px;margin:0 auto;padding:16px 16px 96px}.page-wide{max-width:960px;margin:0 auto;padding:16px 16px 96px}h1{margin:0 0 16px;font-size:26px}h2{margin:0 0 12px;font-size:20px}.btn{min-height:56px;color:var(--text);cursor:pointer;background:#efe6d4;border:none;border-radius:16px;justify-content:center;align-items:center;gap:8px;padding:12px 24px;font-size:18px;font-weight:600;transition:transform 80ms,filter .15s;display:inline-flex}.btn:active{filter:brightness(.95);transform:scale(.96)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--primary);color:#fff}.btn-blue{background:var(--blue);color:#fff}.btn-success{background:var(--success);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-big{border-radius:20px;min-height:88px;font-size:22px}.btn-round{border-radius:999px;width:96px;height:96px;min-height:96px;padding:0;font-size:40px}.btn-block{width:100%}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:20px;padding:16px;box-shadow:0 2px 10px #b48c3c0f}.login-screen{flex-direction:column;justify-content:center;align-items:center;gap:28px;min-height:100svh;padding:24px;display:flex}.login-title{color:var(--primary-dark);font-size:32px;font-weight:800}.role-picker{flex-wrap:wrap;justify-content:center;gap:20px;display:flex}.role-btn{background:var(--card-bg);cursor:pointer;border:none;border-radius:24px;flex-direction:column;justify-content:center;align-items:center;gap:12px;width:220px;height:180px;font-size:22px;font-weight:700;display:flex;box-shadow:0 4px 16px #b48c3c1f}.role-btn:active{transform:scale(.97)}.role-emoji{font-size:56px}.login-form{flex-direction:column;gap:14px;width:100%;max-width:360px;display:flex}.login-form input{border:2px solid var(--border);background:#fff;border-radius:14px;min-height:56px;padding:10px 16px;font-size:20px}.login-form input:focus{border-color:var(--primary);outline:none}.link-btn{color:var(--blue);cursor:pointer;background:0 0;border:none;padding:8px;font-size:15px;text-decoration:underline}.error-text{color:var(--danger);text-align:center;font-size:15px}.info-text{color:var(--blue);text-align:center;background:#eaf3fc;border-radius:12px;margin-bottom:12px;padding:10px 14px;font-size:15px}.pin-display{justify-content:center;gap:14px;display:flex}.pin-dot{border:2px solid var(--primary);background:0 0;border-radius:50%;width:22px;height:22px}.pin-dot.filled{background:var(--primary)}.pin-pad{grid-template-columns:repeat(3,84px);justify-content:center;gap:16px;display:grid}.pin-key{background:var(--card-bg);cursor:pointer;border:none;border-radius:20px;width:84px;height:84px;font-size:30px;font-weight:700;box-shadow:0 2px 8px #b48c3c1a}.pin-key:active{background:#ffe9c7;transform:scale(.94)}.kid-shell{flex-direction:column;min-height:100svh;display:flex}.kid-topbar{background:var(--card-bg);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:14px 20px;display:flex}.kid-topbar-title{font-size:20px;font-weight:700}.kid-content{flex:1;overflow-y:auto}.kid-bottom-nav{border-top:1px solid var(--border);background:var(--card-bg);display:flex}.kid-nav-item{color:var(--text-muted);flex-direction:column;flex:1;align-items:center;gap:4px;padding:10px 4px 12px;font-size:13px;font-weight:600;text-decoration:none;display:flex}.kid-nav-item.active{color:var(--primary-dark)}.kid-nav-icon{font-size:26px}.task-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;display:grid}.task-card{background:var(--card-bg);cursor:pointer;text-align:left;border:none;border-radius:20px;align-items:center;gap:16px;min-height:88px;padding:20px;display:flex;position:relative;box-shadow:0 3px 12px #b48c3c1a}.task-tag{border-radius:999px;padding:2px 9px;font-size:12px;font-weight:700;position:absolute;top:10px;right:12px}.task-tag-primary{color:var(--primary-dark);background:#fff3e0}.task-tag-secondary{color:var(--success);background:#eaf6ea}.task-tag-overdue{color:var(--danger);background:#fceaea;left:12px;right:auto}.task-card:active{transform:scale(.98)}.task-card.done{opacity:.85;background:#f2f8f0}.task-icon{flex-shrink:0;font-size:40px}.task-title{font-size:19px;font-weight:700}.task-check{color:var(--success);margin-left:auto;font-size:26px}.player-bar{background:var(--card-bg);border:1px solid var(--border);z-index:5;border-radius:20px;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:16px;padding:14px 16px;display:flex;position:sticky;top:8px}.toggle-chip{border:2px solid var(--border);cursor:pointer;color:var(--text-muted);background:#fff;border-radius:999px;padding:10px 16px;font-size:15px;font-weight:600}.toggle-chip.on{border-color:var(--primary);color:var(--primary-dark);background:#fff3e0}.sentence-list{flex-direction:column;gap:10px;display:flex}.sentence-row{background:var(--card-bg);cursor:pointer;border:2px solid #0000;border-radius:16px;align-items:flex-start;gap:12px;padding:14px 16px;display:flex}.sentence-row.active{border-color:var(--primary);background:#fff3e0}.sentence-main{flex:1}.sentence-en{font-size:19px;font-weight:600}.sentence-zh{color:var(--text-muted);margin-top:4px;font-size:15px}.sentence-read-btn{background:var(--blue);color:#fff;cursor:pointer;border:none;border-radius:12px;flex-shrink:0;min-height:44px;padding:8px 14px;font-size:15px;font-weight:700}.word-wrong{color:var(--danger);-webkit-text-decoration:underline wavy var(--danger);text-decoration:underline wavy var(--danger);font-weight:800}.modal-backdrop{z-index:50;background:#32281473;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-card{background:var(--card-bg);text-align:center;border-radius:24px;flex-direction:column;align-items:center;gap:20px;width:100%;max-width:520px;max-height:90svh;padding:28px;display:flex;overflow-y:auto}.record-status{color:var(--text-muted);min-height:24px;font-size:16px}.record-btn{background:var(--danger);color:#fff;cursor:pointer;border:none;border-radius:50%;width:120px;height:120px;font-size:48px;box-shadow:0 4px 20px #e5393559}.record-btn.recording{animation:1.1s infinite pulse}@keyframes pulse{0%{box-shadow:0 0 #e5393580}70%{box-shadow:0 0 0 22px #e5393500}to{box-shadow:0 0 #e5393500}}.score-big{font-size:64px;font-weight:800}.score-green{color:var(--success)}.score-yellow{color:var(--warning)}.score-red{color:var(--danger)}.choice-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px;display:grid}.choice-btn{border:3px solid var(--border);cursor:pointer;background:#fff;border-radius:16px;min-height:72px;padding:12px;font-size:20px;font-weight:700}.choice-btn.selected{border-color:var(--blue);background:#eaf3fc}.choice-btn.correct{border-color:var(--success);background:#eaf6ea}.choice-btn.incorrect{border-color:var(--danger);background:#fceaea}.order-track{border:2px dashed var(--border);border-radius:16px;flex-wrap:wrap;gap:10px;min-height:64px;padding:12px;display:flex}.order-chip{border:2px solid var(--primary);background:#fff3e0;border-radius:12px;padding:10px 16px;font-size:18px;font-weight:700}.match-columns{justify-content:center;gap:24px;display:flex}.match-col{flex-direction:column;gap:12px;display:flex}.match-item{border:2px solid var(--border);cursor:pointer;background:#fff;border-radius:14px;min-width:120px;min-height:56px;padding:10px 16px;font-size:18px;font-weight:700}.match-item.selected{border-color:var(--blue);background:#eaf3fc}.match-item.matched{border-color:var(--success);opacity:.7;background:#eaf6ea}.empty-state{color:var(--text-muted);text-align:center;flex-direction:column;align-items:center;gap:12px;padding:64px 24px;display:flex}.empty-emoji{font-size:64px}.reward-card{flex-direction:column;align-items:center;gap:8px;padding:28px;display:flex}.reward-stars{letter-spacing:4px;font-size:40px}.reward-stat-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;width:100%;margin-top:16px;display:grid}.reward-stat{text-align:center;background:#fff3e0;border-radius:16px;padding:16px}.reward-stat-value{color:var(--primary-dark);font-size:28px;font-weight:800}.reward-stat-label{color:var(--text-muted);margin-top:4px;font-size:14px}.badge-list{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:8px;display:flex}.badge-chip{border:2px solid var(--primary);background:#fff;border-radius:999px;padding:8px 14px;font-size:14px;font-weight:700}.loading-center{color:var(--text-muted);justify-content:center;align-items:center;padding:48px;font-size:16px;display:flex}.parent-shell{flex-direction:column;min-height:100svh;display:flex}.parent-topnav{background:var(--card-bg);border-bottom:1px solid var(--border);flex-wrap:wrap;align-items:center;gap:4px;padding:10px 20px;display:flex}.parent-brand{color:var(--primary-dark);margin-right:16px;font-size:17px;font-weight:800}.parent-nav-item{color:var(--text-muted);border-radius:12px;padding:8px 14px;font-size:15px;font-weight:600;text-decoration:none}.parent-nav-item.active{color:var(--primary-dark);background:#fff3e0}.parent-nav-spacer,.parent-content{flex:1}.filter-bar{flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:16px;display:flex}.filter-bar select,.filter-bar input[type=text],.filter-bar input[type=search]{border:2px solid var(--border);background:#fff;border-radius:10px;min-height:40px;padding:6px 12px;font-size:15px}.form-grid{flex-direction:column;gap:12px;max-width:480px;display:flex}.form-row label{color:var(--text-muted);margin-bottom:6px;font-size:14px;font-weight:700;display:block}.form-row input[type=text],.form-row input[type=date],.form-row input[type=password],.form-row input[type=search],.form-row select,.form-row textarea{border:2px solid var(--border);background:#fff;border-radius:10px;width:100%;min-height:44px;padding:8px 12px;font-family:inherit;font-size:15px}.form-row textarea{resize:vertical}.radio-row{gap:16px;display:flex}.radio-row label{color:var(--text);align-items:center;gap:6px;font-size:15px;font-weight:600;display:flex}.list-rows{flex-direction:column;gap:10px;display:flex}.list-row{background:var(--card-bg);border:1px solid var(--border);border-radius:16px;flex-wrap:wrap;align-items:center;gap:12px;padding:14px 16px;display:flex}.list-row-main{flex:1;min-width:200px}.list-row-title{font-size:16px;font-weight:700}.list-row-sub{color:var(--text-muted);white-space:pre-line;margin-top:2px;font-size:13px}.list-row-actions{flex-wrap:wrap;gap:8px;display:flex}.badge{color:var(--text);background:#efe6d4;border-radius:999px;align-items:center;padding:4px 10px;font-size:13px;font-weight:700;display:inline-flex}.badge-blue{color:var(--blue);background:#eaf3fc}.badge-orange{color:var(--primary-dark);background:#fff3e0}.badge-green{color:var(--success);background:#eaf6ea}.badge-red{color:var(--danger);background:#fceaea}.badge-gray{color:var(--text-muted);background:#efeae0}.tag-list{flex-wrap:wrap;gap:8px;display:flex}.btn-sm{border-radius:10px;min-height:36px;padding:6px 14px;font-size:14px}.section-title{margin:24px 0 10px;font-size:17px;font-weight:800}.section-title:first-child{margin-top:0}.video-category-row{flex-wrap:wrap;gap:8px;margin:10px 0 14px;display:flex}.video-player-wrap{margin-bottom:16px}.video-player-wrap video{background:#000;border-radius:16px;width:100%;max-height:420px}