:root{--study-content: 880px;--study-height: 100dvh}body{line-height:1.55;background-image:none}body:after{display:none}button,input,textarea,summary{touch-action:manipulation}button:focus-visible,summary:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--color-primary);outline-offset:4px}button{-webkit-tap-highlight-color:transparent}.study-eyebrow{color:var(--color-primary);font-size:.7rem;font-weight:700;letter-spacing:.12em;margin:0 0 10px}#welcome-screen .welcome-card{width:100%;max-width:var(--study-content);margin:0 auto;padding:28px 24px 40px!important;background:transparent;border:0;box-shadow:none}#welcome-screen .welcome-hero{display:flex!important;align-items:center;justify-content:space-between;min-height:0!important;height:auto!important;padding:12px 0 28px!important;margin:0!important;gap:16px}#welcome-screen .logo-area{text-align:left;margin:0;flex:1}#welcome-screen .logo-area h1{font-size:clamp(26px,3vw,38px);line-height:1.25;letter-spacing:-.04em;margin:0 0 12px;font-weight:650}#welcome-screen .logo-area h1 span{background:none;color:var(--color-primary);-webkit-text-fill-color:currentColor}#welcome-screen .subtitle{font-size:.9rem;line-height:1.6;color:var(--text-muted);margin:0}#welcome-screen .welcome-panda{position:relative!important;inset:auto!important;width:108px!important;height:120px!important;flex:0 0 108px;transform:none;margin:0!important}#welcome-screen .welcome-panda[data-state=hidden]{visibility:visible;opacity:1}.welcome-panda .panda-actor__motion{max-width:100%}#welcome-screen .config-group{margin:0 0 22px}#welcome-screen .config-group h3,.quick-game-heading h3{font-size:.88rem!important;color:var(--text-main);text-transform:none;letter-spacing:0;font-weight:600;margin:0 0 10px}.deck-picker-trigger{min-height:72px;border-width:1px;border-radius:16px;box-shadow:none;padding:14px 16px;background:var(--bg-card)}.deck-picker-trigger:focus-visible{outline-offset:3px}#deck-picker-status:empty{display:none}#path-tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}#path-tiles .path-tile-label{min-height:136px;padding:16px 12px;border:1px solid var(--border-color);border-radius:16px;background:var(--bg-card);box-shadow:none;align-items:flex-start;text-align:left;gap:6px}#path-tiles .path-tile-icon{font-size:1.5rem;margin:0}#path-tiles .path-tile-name{font-size:.9rem;font-weight:600}#path-tiles .path-tile-desc{font-size:.73rem;line-height:1.5;font-weight:400}#path-tiles input:checked+.tile-label{border-color:var(--color-primary);background:color-mix(in srgb,var(--color-primary) 9%,var(--bg-card));box-shadow:0 0 0 1px var(--color-primary)}.path-summary{display:block;margin:10px 0 0;padding:0;border:0;background:transparent;color:var(--text-muted);font-size:.76rem}.session-settings{margin:0 0 24px;border:1px solid var(--border-color);border-radius:14px;background:var(--bg-card)}.session-settings>summary{padding:14px 16px;cursor:pointer;font-size:.85rem;font-weight:500;min-height:48px}.session-settings>summary span{float:right;font-size:.7rem;font-weight:400;color:var(--text-muted);margin-top:3px}.session-settings-body{padding:8px 16px 16px}.session-settings .radio-tiles{display:flex;flex-wrap:wrap;gap:8px}.session-settings .tile-option{flex:1 1 90px}.session-settings .tile-label{min-height:44px;padding:10px;font-size:.8rem;border-width:1px;box-shadow:none}#extra-path-tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}#extra-path-tiles .path-tile-label{min-height:112px}.audio-settings{display:grid;gap:12px;font-size:.85rem}.audio-settings label{display:flex;align-items:center;gap:10px;min-height:44px}.audio-settings input{accent-color:var(--color-primary);width:20px;height:20px}.quick-game-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.quick-game-card{border-width:1px;box-shadow:none;border-radius:14px}.quick-game-card strong{font-weight:550}.study-start{position:sticky;bottom:0;z-index:10;padding:12px 0;background:var(--bg-main);border-top:1px solid var(--border-color)}.study-start p{margin:0 0 8px;font-size:.77rem;color:var(--text-muted);text-align:center}#start-btn{margin:0;width:100%;font-size:1rem;min-height:52px;border-radius:14px;animation:none;box-shadow:none;border:0;background:var(--color-primary);text-transform:none}.primary-btn{background:var(--color-primary);border-radius:12px;box-shadow:none;border-bottom-width:1px;min-height:48px;font-weight:600}.secondary-btn{border-radius:12px;box-shadow:none;border-width:1px;min-height:44px}.daily-goal{display:grid;gap:8px;width:100%;text-align:left;padding:14px 0;color:var(--text-main);border:0;background:transparent;font:inherit;cursor:pointer}.daily-goal-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:.8rem}.daily-goal-heading strong{color:var(--color-primary);font-size:.76rem;white-space:nowrap}.daily-goal-track{display:block;height:5px;overflow:hidden;background:var(--border-color);border-radius:8px}.daily-goal-track>span{display:block;height:100%;width:0;border-radius:inherit;background:var(--color-primary);transition:width .3s}[data-goal-label]{color:var(--text-muted);font-size:.7rem}.mobile-goal{margin-bottom:18px;border-bottom:1px solid var(--border-color)}#game-screen.active{min-height:var(--study-height);padding:0}#game-screen .game-header{max-width:960px;width:100%;margin:0 auto;padding:20px 24px;border-bottom:1px solid var(--border-color);gap:16px;box-shadow:none;background:var(--bg-main)}#game-screen[data-challenge=false] .hearts-display{display:none!important}#game-screen .game-content{max-width:800px;width:100%;padding:32px 24px;margin:0 auto}#game-screen .speech-bubble{border-width:1px;border-radius:20px;padding:20px 24px;box-shadow:none;background:var(--bg-card)}#game-screen .instruction{font-size:.8rem;text-transform:none;letter-spacing:0;font-weight:500;color:var(--text-muted)}#vietnamese-sentence{font-size:clamp(20px,3vw,28px);line-height:1.5;overflow-wrap:anywhere}#game-screen .prompt-bubble-container{margin-bottom:28px}#game-screen .workspace{min-height:80px;margin-bottom:20px}#game-screen .word-tile{min-height:48px;min-width:44px;border-width:1px;border-bottom-width:2px;border-radius:12px;font-size:1rem;padding:10px 16px}#game-screen .options-container{gap:10px}#game-screen .validation-drawer{padding:16px 24px calc(16px + env(safe-area-inset-bottom));border-radius:0;box-shadow:none;border-top-width:1px}.validation-drawer .drawer-inner{max-width:800px;gap:16px}#game-screen .choice-card,#game-screen .matching-card{min-height:58px;border-width:1px;border-radius:14px;box-shadow:none}#game-screen .matching-card{overflow-wrap:anywhere}#game-screen .matching-grid{gap:14px}#game-screen .matching-card.matched{opacity:.7}.matching-board-summary{font-size:.8rem;color:var(--text-muted);margin:12px 0}.typing-input{font-size:18px;min-height:56px;border-radius:14px}.builder-tools{display:flex;justify-content:flex-end;gap:8px;margin:8px 0}.builder-tools button{border:0;background:transparent;color:var(--text-muted);min-height:44px;padding:8px 12px;font:inherit;font-size:.8rem}.speak-workspace{max-width:680px;margin:auto;padding:20px;border:1px solid var(--border-color);background:var(--bg-card);border-radius:20px}.speak-lead{font-size:.85rem;line-height:1.7}.speak-samples,.speak-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.speak-samples button{flex:1;font-size:.8rem}.speak-level{display:block;width:100%;height:18px;margin-top:20px;accent-color:var(--color-primary)}.speak-status{min-height:3em;font-size:.85rem}.speak-record-btn{min-height:52px;flex:1;border-radius:14px}.speak-next-btn{flex:1}.speak-tiles{gap:5px;margin-top:16px}.speak-tile{min-width:0;padding:5px 8px;font-size:1.2rem}.speak-tile.is-miss{background:color-mix(in srgb,var(--color-accent) 12%,var(--bg-card))}.tap-answer-dock{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;padding:12px;background:var(--bg-card);border-top:1px solid var(--border-color)}.tap-answer-dock button{min-height:48px;padding:8px 12px;background:var(--bg-main);color:var(--text-main);border:1px solid var(--border-color);border-radius:10px;font:inherit;overflow-wrap:anywhere}.tap-answer-dock button:disabled{opacity:.45}.tap-answer-dock .tap-built-answer{grid-column:1 / -1;min-height:32px;text-align:center;color:var(--color-primary);font-weight:600}.tap-answer-dock .tap-reset{grid-column:1 / -1;font-size:.8rem}#game-screen[data-input-variant=touch] .speedtype-input,#game-screen[data-input-variant=touch] .monster-input{display:none}.result-card{max-width:800px;border-width:1px;border-radius:24px;box-shadow:none}.result-actions{flex-wrap:wrap;gap:10px}.result-actions #review-missed-btn:not([hidden]){order:-1;background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.review-item{border-radius:14px;border-width:1px}.stats-grid{gap:12px}.course-root{max-width:860px;margin:0 auto}@media(min-width:1024px){#welcome-screen{padding:24px 280px 24px 244px!important}.desktop-nav-sidebar{width:220px;padding:28px 16px;border-right:1px solid var(--border-color);background:var(--bg-main)}.desktop-widget-sidebar{width:256px;padding:28px 16px;background:var(--bg-main);border-left:1px solid var(--border-color)}.desktop-sidebar-brand{padding:0 10px 24px}.desktop-sidebar-brand strong{font-size:1.15rem}.desktop-nav-item{min-height:48px;font-size:.85rem;padding:12px;border-radius:12px;box-shadow:none}.desktop-nav-item.active{background:color-mix(in srgb,var(--color-primary) 10%,transparent);box-shadow:none;border-color:transparent}.desktop-widget-card{padding:16px;border-radius:18px;border-width:1px;box-shadow:none;background:var(--bg-card)}.widget-mascot-card,.mobile-goal,#welcome-screen .learning-tabs{display:none}#welcome-screen .welcome-card{padding:0 20px 32px!important}}@media(min-width:1024px)and (max-width:1199px){#welcome-screen{padding-right:24px!important}.desktop-widget-sidebar{display:none!important}.mobile-goal{display:block}}@media(max-width:767px){#welcome-screen{padding:8px 14px 76px!important}#welcome-screen .welcome-card{padding:0 0 20px!important}#welcome-screen .welcome-hero{padding:24px 2px 12px!important}#welcome-screen .welcome-panda{width:76px!important;height:90px!important;flex-basis:76px}#welcome-screen .logo-area h1{font-size:26px}#welcome-screen .subtitle{font-size:.78rem}#welcome-screen .learning-tabs{display:none!important}.welcome-top-bar{box-shadow:none;border-width:1px;background:var(--bg-main)}.study-eyebrow{font-size:.62rem}#path-tiles{gap:8px}#path-tiles .path-tile-label{padding:12px 9px;min-height:132px}#path-tiles .path-tile-name{font-size:.78rem}#path-tiles .path-tile-desc{font-size:.66rem}#path-tiles .path-tile-icon{font-size:1.2rem}.session-settings>summary{font-size:.8rem}.session-settings>summary span{float:none;display:block;margin-left:16px}.study-start{bottom:calc(58px + env(safe-area-inset-bottom));margin:0 -2px;padding:10px 2px}.mobile-bottom-nav{box-shadow:none}.mobile-nav-btn{min-height:48px;padding:5px 8px}#game-screen .game-header{padding:12px 14px;gap:10px}#game-screen .game-content{padding:24px 16px}#game-screen .speech-bubble{padding:16px}#game-screen .prompt-bubble-container{gap:8px}#game-screen .mascot-small{flex-basis:36px;width:36px}#game-screen .validation-drawer{padding:12px 16px calc(12px + env(safe-area-inset-bottom))}#game-screen .workspace{min-height:64px}.drawer-inner{align-items:stretch}.drawer-actions{width:100%}.drawer-actions .primary-btn{flex:1}#game-screen .matching-grid{gap:10px}.speak-workspace{padding:14px}.speak-tile{font-size:1rem}.speak-actions{gap:8px}.speak-samples button{padding:8px}.result-card{margin:16px 12px;padding:24px 16px}.result-actions>button{flex:1 1 140px}}.study-keyboard-open #game-screen.active{height:var(--study-height);min-height:0;overflow-y:auto;padding-bottom:0}.study-keyboard-open #game-screen .game-header{position:sticky;top:0;z-index:5}.study-keyboard-open #game-screen .game-content{padding-top:12px;padding-bottom:12px}.study-keyboard-open #game-screen .validation-drawer{position:sticky;bottom:0}.study-keyboard-open #game-screen .prompt-bubble-container{margin-bottom:12px}.study-keyboard-open #game-screen .mascot-small{display:none}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important}.daily-goal-track>span,.word-tile,.matching-card,.tap-answer-dock button{transition:none}}#welcome-screen.course-detail-active .welcome-hero,#welcome-screen.course-detail-active .mobile-goal,[hidden].tap-answer-dock,[hidden].study-start,.speak-workspace [hidden]{display:none!important}.panda-feedback{position:fixed}#game-screen .single-word-answer-slots{display:grid;grid-template-columns:1fr;padding:0;gap:6px}#game-screen .single-word-answer-stage,#game-screen .single-word-answer-placeholder,#game-screen .single-word-answer{min-height:96px}#game-screen .single-word-answer{padding:10px 16px;background:var(--bg-card);box-shadow:none;border-width:1px}#game-screen .single-word-answer:after{display:none}#game-screen .builder-replay-btn{justify-self:center;margin:0}#game-screen .builder-tools{margin:0}#welcome-screen .welcome-card{gap:16px}#welcome-screen .config-section{gap:18px}#welcome-screen .config-group,.session-settings{margin-bottom:0}#welcome-screen .config-group h3{color:var(--text-main)!important;font-weight:600!important;letter-spacing:0!important;text-transform:none!important}#welcome-screen .mobile-goal{margin-bottom:0}#welcome-screen #start-btn{background:var(--color-primary)!important;box-shadow:none!important;border:0!important}#welcome-screen .study-start{width:100%}@media(max-width:767px){#welcome-screen .study-start{position:fixed;left:14px;right:14px;width:auto;bottom:calc(58px + env(safe-area-inset-bottom));margin:0}#welcome-screen .welcome-card{padding-bottom:140px!important}#welcome-screen .welcome-hero{padding-top:16px!important;padding-bottom:0!important}#welcome-screen .logo-area h1{font-size:24px}#welcome-screen .mobile-goal .daily-goal{padding:8px 0 12px}}#game-screen .single-word-answer-stage,#game-screen .single-word-answer-placeholder,#game-screen .single-word-answer{height:112px;min-height:112px}#game-screen .game-content{overflow-anchor:none}#game-screen[data-input-variant=touch] .speed-fall-arena{height:clamp(160px,calc(var(--study-height) - 490px),300px);min-height:160px}#game-screen[data-input-variant=touch] .monster-scene{height:clamp(260px,calc(var(--study-height) - 450px),340px)}#game-screen[data-input-variant=touch] .speed-input-dock{padding:0}#game-screen[data-input-variant=touch] .game-content:has(.tap-answer-dock){padding:12px}#game-screen[data-input-variant=touch] .tap-answer-dock{grid-template-columns:repeat(4,minmax(0,1fr))}#game-screen[data-input-variant=touch] .tap-answer-dock.is-choice{grid-template-columns:repeat(2,minmax(0,1fr))}.audio-unavailable{position:fixed;z-index:250;bottom:16px;left:50%;transform:translate(-50%);max-width:calc(100vw - 24px);min-height:44px;padding:12px 18px;border:1px solid var(--border-color);border-radius:12px;color:var(--text-main);background:var(--bg-card);font:inherit}.welcome-top-bar{background:var(--bg-main)!important;-webkit-backdrop-filter:none;backdrop-filter:none;box-shadow:none}.welcome-nav-actions button,.welcome-nav-actions a{min-height:44px}@media(max-width:430px){#welcome-nav-brand strong{display:none}#welcome-nav-brand{flex:0 0 34px}.welcome-nav-actions{gap:6px}}