.auth-shell{--auth-blue: #173F73;--auth-purple: #7047EB;--auth-cream: #FFF4D8;--auth-warm-bg: #FFFDF8;--auth-border: #DCE4EF;--auth-text-secondary: #5B6678;--auth-error: #B42318;--auth-error-bg: #FDECEC;box-sizing:border-box;display:flex;flex-direction:column;min-height:100vh;max-width:420px;margin:0 auto;padding:40px 20px 48px;background:var(--auth-warm-bg);color:#17233a}.auth-shell *{box-sizing:border-box}.auth-brand{color:var(--auth-blue);font-weight:900;font-size:1.3rem;letter-spacing:-.03em}.auth-welcome{align-items:center;text-align:center;justify-content:center;gap:4px}.auth-headline{font-size:clamp(1.7rem,6vw,2.2rem);line-height:1.12;margin:14px 0 10px}.auth-welcome .auth-headline{margin-top:18px}.auth-subcopy{color:var(--auth-text-secondary);font-size:1.02rem;line-height:1.5;margin:0 0 8px}.auth-actions{display:grid;gap:12px;width:100%;margin-top:26px}.auth-cta{width:100%;min-height:52px;margin:0}.auth-form{display:grid;gap:16px;margin-top:18px}.auth-field{display:grid;gap:6px;text-align:left;font-weight:750}.auth-field .answer{margin-bottom:0}.auth-error{color:var(--auth-error);background:var(--auth-error-bg);border-radius:12px;padding:12px 14px;font-weight:700;margin:0}.auth-offline-notice{color:#8a5a00;background:var(--auth-cream);border-radius:12px;padding:10px 14px;font-weight:700;font-size:.92rem;margin:4px 0 0}.auth-boot{align-items:center;justify-content:center;text-align:center;gap:18px}.auth-boot-spinner{width:34px;height:34px;border-radius:999px;border:4px solid var(--auth-border);border-top-color:var(--auth-blue);animation:auth-boot-spin .8s linear infinite}.auth-boot-copy{color:var(--auth-text-secondary);font-weight:650;margin:0}@keyframes auth-boot-spin{to{transform:rotate(360deg)}}@media(max-width:380px){.auth-shell{padding:32px 16px 40px}.mascot--lg{width:104px;height:104px}}:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#17233a;background:#fffdf8;--blue: #173F73;--purple: #7047EB;--yellow: #FFC83D;--orange: #FF8A3D;--cream: #FFF4D8;--border: #DCE4EF;--success: #1F7A4D;--success-bg: #EAF7F0;--error: #B42318;--error-bg: #FDECEC;--selected-bg: #F3EFFF}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit}button:focus-visible,input:focus-visible{outline:3px solid rgba(112,71,235,.22);outline-offset:2px}.shell{max-width:760px;margin:0 auto;min-height:100vh;padding:24px 18px 48px}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;gap:12px}.header-actions{display:flex;align-items:center;gap:8px}.brand{color:var(--blue);font-weight:900;font-size:1.45rem;letter-spacing:-.03em}.streak{font-weight:800;color:#8a5a00;background:var(--cream);padding:9px 12px;border-radius:999px}.lesson-progress{margin:4px 0 28px}.lesson-progress-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px;color:#5b6678;font-size:.82rem;font-weight:800}.lesson-progress-meta strong{color:var(--blue);font-variant-numeric:tabular-nums}.progress{height:14px;border-radius:999px;background:#e9eef5;overflow:hidden;box-shadow:inset 0 1px 2px #173f7314}.progress span{display:block;height:100%;background:var(--yellow);border-radius:inherit;transition:width .25s ease}.lesson-nav{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-bottom:16px}.lesson-pill{border:1px solid var(--border);background:#fff;color:var(--blue);border-radius:14px;padding:10px 8px;cursor:pointer;text-align:left;min-width:0}.lesson-pill span{display:block;font-weight:900}.lesson-pill small{display:block;margin-top:3px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#657084}.lesson-pill.is-active{border:2px solid var(--purple);background:var(--selected-bg)}.lesson-pill:disabled,.lesson-pill.is-locked{cursor:not-allowed;opacity:.55;background:#f5f7fa;color:#657084}.level-panel{margin:20px 0;padding:16px 18px;border:1px solid var(--border);border-radius:18px;background:var(--cream);text-align:left}.level-panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px;font-weight:900;color:var(--blue)}.level-panel-caption{margin:8px 0 0;color:#8a5a00;font-weight:700;font-size:.88rem}.mascot{display:block;object-fit:cover;background:var(--cream);border-radius:28px}.mascot--sm{width:40px;height:40px;border-radius:12px;flex:0 0 auto}.mascot--md{width:84px;height:84px;margin:0 auto 14px;border-radius:24px}.mascot--lg{width:124px;height:124px;margin:0 auto 14px}.mascot-placeholder{display:flex;align-items:center;justify-content:center;color:var(--blue);font-weight:900}.mascot-placeholder.mascot--sm{font-size:1.15rem}.mascot-placeholder.mascot--md{font-size:2rem}.mascot-placeholder.mascot--lg{font-size:2.6rem}.exercise-header h1{margin:10px 0 14px}.exercise-mascot-row{display:flex;align-items:flex-end;gap:12px;margin-bottom:4px}.exercise-mascot-row .mascot--lg{width:96px;height:96px;margin:0;flex:0 0 auto}.exercise-mascot-row .mascot--md{margin:0;flex:0 0 auto}.exercise-speech-bubble{position:relative;flex:1;min-width:0;background:#fff;border:2px solid var(--border);border-radius:18px;padding:14px 16px}.exercise-speech-bubble:before{content:"";position:absolute;left:-9px;bottom:22px;width:16px;height:16px;background:#fff;border-left:2px solid var(--border);border-bottom:2px solid var(--border);transform:rotate(45deg)}.exercise-prompt-text{margin:0;font-size:clamp(1.15rem,4.2vw,1.55rem);font-weight:900;line-height:1.22;color:#17233a}.card{background:#fff;border:1px solid var(--border);border-radius:24px;padding:28px;box-shadow:0 14px 35px #173f7314}.card.success{background:#fff9e8;text-align:center}.success-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:20px}.success-actions .primary,.success-actions .secondary{margin:0}.account-card{max-width:560px;margin:48px auto 0}.auth-form{display:grid}.eyebrow{color:var(--purple);font-size:.78rem;font-weight:900;text-transform:uppercase;letter-spacing:.09em}h1{font-size:clamp(1.6rem,5vw,2.3rem);margin:10px 0 22px;line-height:1.08}.hint,.feedback{color:#5b6678}.exercise-media{display:grid;gap:14px;margin:-2px 0 20px}.audio-clip{display:flex;flex-wrap:wrap;align-items:center;gap:10px}.audio-play{display:inline-flex;align-items:center;gap:10px;min-height:52px;padding:12px 17px;border:2px solid var(--purple);border-radius:16px;background:var(--selected-bg);color:var(--blue);font-weight:850;cursor:pointer}.audio-play:hover{background:#fff}.audio-icon{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:999px;background:#fff}.audio-error,.image-error{color:var(--error);font-weight:750;font-size:.92rem}.image-clip{margin:0;display:flex;flex-direction:column;align-items:center;gap:10px}.exercise-image{display:block;width:min(100%,420px);max-height:330px;object-fit:contain;border:1px solid var(--border);border-radius:20px;background:#fafbfd}.image-error{width:100%;padding:18px;border:2px dashed var(--error);border-radius:16px;background:var(--error-bg);text-align:center}.image-label{margin:0;color:var(--blue);font-weight:800;font-size:.95rem;text-transform:uppercase;letter-spacing:.04em}.choices{display:grid;gap:12px}.choice,.chip{text-align:left;background:#fff;border:2px solid var(--border);border-radius:16px;padding:15px 17px;font-weight:750;cursor:pointer;min-height:52px}.choice{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%}.choice:hover:not(:disabled),.chip:hover:not(:disabled){border-color:var(--purple)}.choice.is-selected{border-color:var(--purple);background:var(--selected-bg)}.choice.is-correct{border-color:var(--success);background:var(--success-bg);color:#145c39}.choice.is-incorrect{border-color:var(--error);background:var(--error-bg);color:#8a1c13}.choice:disabled{cursor:default;opacity:1}.state-icon{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:999px;border:2px solid currentColor;font-weight:900;line-height:1}.inline-result{display:flex;align-items:center;gap:10px;margin-top:14px;padding:12px 14px;border-radius:14px;font-weight:800}.inline-result.is-correct{background:var(--success-bg);color:#145c39}.inline-result.is-incorrect{background:var(--error-bg);color:#8a1c13}.choice-continue{margin-top:14px}.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}.selected-order{min-height:68px;display:flex;flex-wrap:wrap;align-items:center;gap:10px;padding:12px;margin-bottom:16px;border:2px dashed var(--border);border-radius:16px;background:#fafbfd}.selected-order.is-correct{border-style:solid;border-color:var(--success);background:var(--success-bg)}.selected-order.is-incorrect{border-style:solid;border-color:var(--error);background:var(--error-bg)}.selected-order-placeholder{color:#778196;font-weight:650}.selected-chip{display:inline-flex;align-items:center;gap:8px;background:var(--selected-bg);border-color:var(--purple);color:#17233a}.chip-remove{font-weight:900}.chip:disabled{cursor:default;opacity:.42}.selected-chip:disabled{opacity:1;color:#17233a;-webkit-text-fill-color:#17233A}.answer{width:100%;min-height:54px;padding:14px 16px;border:2px solid var(--border);border-radius:15px;margin-bottom:14px;color:#17233a;background:#fff}.answer:focus{outline:3px solid rgba(112,71,235,.15);border-color:var(--purple)}.answer[readonly]{opacity:1;-webkit-text-fill-color:currentColor}.answer.is-correct{border-color:var(--success);background:var(--success-bg);color:#17233a;-webkit-text-fill-color:#17233A}.answer.is-incorrect{border-color:var(--error);background:var(--error-bg);color:#17233a;-webkit-text-fill-color:#17233A}.primary{background:var(--blue);color:#fff;border:0;border-radius:15px;padding:14px 20px;min-height:48px;font-weight:850;cursor:pointer}.primary:disabled{opacity:.45;cursor:not-allowed}.secondary{display:inline-flex;align-items:center;justify-content:center;background:#fff;color:var(--blue);border:2px solid var(--blue);border-radius:15px;padding:12px 20px;min-height:48px;font-weight:800;cursor:pointer;margin-top:12px;margin-right:10px}.secondary:hover{background:var(--selected-bg);border-color:var(--purple);color:var(--purple)}.secondary.compact{min-height:38px;padding:8px 12px;margin:0;font-size:.9rem}.file-button{position:relative;overflow:hidden}.feedback{margin-top:18px;font-weight:700}.review-item{margin-bottom:22px}.matching-instructions{color:#657084;font-weight:650;margin:0 0 14px}.matching-board{display:grid;grid-template-columns:1fr 1fr;gap:14px}.matching-column{display:grid;gap:10px;align-content:start}.match-choice{min-height:58px}.xp-earned{font-size:1.45rem;font-weight:900;color:#8a5a00}.vocabulary-intro h1{margin-bottom:10px}.vocabulary-match-board{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0}.vocabulary-match-tile{display:flex;align-items:center;gap:10px;width:100%;min-width:0;text-align:left;background:#fff;border:2px solid var(--border);border-radius:14px;padding:10px 12px;font-weight:750;cursor:pointer;min-height:52px}.vocabulary-match-tile:hover:not(:disabled){border-color:var(--purple)}.vocabulary-match-tile.is-selected{border-color:var(--purple);background:var(--selected-bg)}.vocabulary-match-tile.is-correct{border-color:var(--success);background:var(--success-bg);color:#145c39}.vocabulary-match-tile.is-incorrect{border-color:var(--error);background:var(--error-bg);color:#8a1c13}.vocabulary-match-tile:disabled{cursor:default}.vocabulary-match-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;background:var(--cream);font-size:1.3rem;flex:0 0 auto;overflow:hidden}.vocabulary-match-icon img{width:100%;height:100%;object-fit:cover}.vocabulary-match-word{flex:1;min-width:0;overflow-wrap:anywhere}.vocabulary-match-register{display:block;margin-top:2px;color:var(--purple);font-size:.72rem;font-weight:850;text-transform:capitalize}.vocabulary-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px;margin-top:22px}.vocabulary-actions .secondary{margin:0}@media(max-width:620px){.lesson-nav{display:flex;gap:8px;overflow-x:auto;overscroll-behavior-x:contain;scroll-snap-type:x proximity;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:2px 0 8px;margin-bottom:8px}.lesson-nav::-webkit-scrollbar{display:none}.lesson-pill{flex:0 0 auto;min-width:68px;padding:9px 12px;border-radius:999px;text-align:center;scroll-snap-align:start}.lesson-pill small{display:none}.header-actions{align-items:flex-end;flex-direction:column}}@media(max-width:520px){.shell{padding:18px 14px 36px}.card{padding:22px 18px;border-radius:20px}.exercise-image{max-height:260px}.matching-board{grid-template-columns:1fr}.exercise-mascot-row .mascot--lg{width:76px;height:76px}}@media(max-width:380px){.vocabulary-match-tile{flex-direction:column;align-items:flex-start;padding:10px;gap:6px;font-size:.88rem}.vocabulary-match-icon{width:30px;height:30px;font-size:1rem}}.choice-continue{display:block;width:max-content;margin:14px 0 0 auto}@media(max-width:620px){header{flex-wrap:nowrap;gap:6px}.header-actions{flex:1 1 auto;min-width:0;flex-direction:row;align-items:center;justify-content:flex-end;gap:6px}.brand{flex:0 1 auto;min-width:0;white-space:nowrap;font-size:1.12rem}.streak{flex:0 1 auto;min-width:0;white-space:nowrap;padding:7px 9px;font-size:.76rem}.secondary.compact{flex:0 0 auto;min-height:34px;padding:7px 9px;font-size:.78rem;white-space:nowrap}}@media(max-width:360px){header{gap:4px}.header-actions{gap:4px}.brand{font-size:1rem}.streak{padding:6px 7px;font-size:.7rem}.secondary.compact{padding:6px 7px;font-size:.72rem}}@media(max-width:520px){.matching-board{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}.matching-column{min-width:0}.match-choice{min-width:0;padding:12px 10px;overflow-wrap:anywhere}}