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h1{font-size:1.15rem;font-weight:800;letter-spacing:-.02em;background:linear-gradient(135deg,#fff,#a3a3a3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-back{background:#ffffff0d;border:1px solid var(--border-subtle);color:var(--text-secondary);font-size:1.2rem;cursor:pointer;padding:6px 10px;border-radius:var(--radius-xs);transition:all .2s}.header-back:hover{color:var(--text-primary);background:#ffffff1a;border-color:var(--border-medium)}.header-streak{display:flex;align-items:center;gap:6px;padding:4px 12px;background:#f973161a;border:1px solid rgba(249,115,22,.2);border-radius:20px;font-size:.8rem;font-weight:700;color:var(--streak-fire)}.bottom-nav{display:flex;background:#0a0a0ae6;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border-subtle);padding:6px 8px;padding-bottom:max(6px,env(safe-area-inset-bottom));position:fixed;bottom:0;left:0;right:0;max-width:500px;margin:0 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4px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.lang-selector::-webkit-scrollbar{display:none}.lang-pill{display:flex;align-items:center;gap:6px;padding:8px 16px;background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:20px;color:var(--text-muted);font-size:.8rem;font-weight:600;font-family:inherit;cursor:pointer;transition:all .25s;white-space:nowrap}.lang-pill:hover{background:var(--bg-glass-hover);border-color:var(--border-medium)}.lang-pill.active{background:#8b5cf61a;border-color:#8b5cf64d;color:var(--accent-light)}.lang-flag{font-size:1rem}.tp-grid{display:flex;flex-direction:column;gap:10px;margin-top:16px}.tp-card{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:18px 20px;cursor:pointer;transition:all .3s ease;position:relative;overflow:hidden}.tp-card:before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(139,92,246,.4),transparent);opacity:0;transition:opacity .3s}.tp-card:hover{background:var(--bg-glass-hover);border-color:var(--border-medium);transform:translateY(-2px);box-shadow:0 8px 32px #0000004d}.tp-card:hover:before{opacity:1}.tp-card:active{transform:scale(.98) translateY(0)}.tp-card h3{font-size:.95rem;font-weight:700;letter-spacing:-.01em;margin-bottom:4px}.tp-card p{font-size:.8rem;color:var(--text-muted)}.tp-card .word-count{display:inline-flex;align-items:center;gap:4px;margin-top:10px;padding:4px 10px;background:#ffffff0a;border:1px solid var(--border-subtle);border-radius:20px;font-size:.7rem;color:var(--text-secondary);font-weight:600}.flashcard-container{perspective:1200px;width:100%;margin:16px 0}.flashcard{width:100%;min-height:200px;position:relative;transform-style:preserve-3d;transition:transform .7s cubic-bezier(.4,0,.2,1)}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle)}.flashcard-front{background:linear-gradient(145deg,#ffffff08,#8b5cf608)}.flashcard-back{background:linear-gradient(145deg,#ffffff08,#8b5cf608);transform:rotateY(180deg)}.flashcard-french{text-align:center;margin-bottom:20px}.flashcard-french .label{font-size:.65rem;text-transform:uppercase;letter-spacing:2px;color:var(--text-muted);margin-bottom:8px;font-weight:600}.flashcard-french .word{font-size:1.8rem;font-weight:900;letter-spacing:-.02em;background:linear-gradient(135deg,#fff,#a3a3a3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.input-group{display:flex;flex-direction:column;gap:8px;margin-top:auto}.input-row{display:flex;align-items:center;gap:10px}.input-row label{font-size:.7rem;font-weight:600;color:var(--text-muted);min-width:80px;text-align:right;letter-spacing:.01em}.input-row input{flex:1;padding:10px 14px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.9rem;font-family:inherit;outline:none;transition:all .25s;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.input-row input:focus{border-color:var(--accent);background:#8b5cf60d;box-shadow:0 0 0 3px var(--accent-glow)}.input-row input.correct{border-color:var(--success);background:var(--success-bg)}.input-row 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h3{font-size:.7rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:10px}.setting-card{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:16px;margin-bottom:6px}.setting-card label{font-size:.8rem;color:var(--text-secondary);display:block;margin-bottom:8px;font-weight:500}.setting-card input[type=text],.setting-card input[type=password],.setting-card textarea{width:100%;padding:10px 14px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.85rem;font-family:inherit;outline:none;transition:all .25s}.setting-card input:focus,.setting-card textarea:focus{border-color:var(--accent);background:#8b5cf60d;box-shadow:0 0 0 3px var(--accent-glow)}.ai-section{margin-top:12px;background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius);overflow:hidden}.ai-toggle{width:100%;display:flex;align-items:center;gap:10px;padding:12px 16px;background:none;border:none;color:var(--text-primary);font-size:.85rem;font-weight:600;font-family:inherit;cursor:pointer;text-align:left}.ai-toggle .ai-badge{padding:2px 8px;background:linear-gradient(135deg,var(--accent),var(--accent-light));border-radius:10px;font-size:.65rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px}.ai-content{padding:0 16px 16px}.ai-response{padding:14px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);font-size:.82rem;line-height:1.6;color:var(--text-secondary);white-space:pre-wrap}.ai-loading{display:flex;align-items:center;gap:8px;padding:14px;color:var(--text-muted);font-size:.82rem}.ai-dot{width:5px;height:5px;border-radius:50%;background:var(--accent);animation:pulse 1.4s infinite}.ai-dot:nth-child(2){animation-delay:.2s}.ai-dot:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,80%,to{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1.1)}}.manage-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.tp-manage-card{background:var(--bg-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:14px 16px;margin-bottom:8px;transition:all .25s}.tp-manage-card:hover{border-color:var(--border-medium)}.tp-manage-card .tp-manage-header{display:flex;align-items:center;justify-content:space-between}.tp-manage-card h4{font-size:.9rem;font-weight:700}.tp-manage-actions{display:flex;gap:6px}.btn-icon{background:#ffffff0d;border:1px solid var(--border-subtle);color:var(--text-muted);width:32px;height:32px;border-radius:var(--radius-xs);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s;font-size:.9rem}.btn-icon:hover{background:#ffffff1a;border-color:var(--border-medium);color:var(--text-primary)}.btn-icon.danger:hover{background:var(--error-bg);border-color:#ef44444d;color:var(--error)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;padding:20px;z-index:200;animation:fadeIn .2s}.modal{background:var(--bg-secondary);border:1px solid var(--border-medium);border-radius:var(--radius);width:100%;max-width:460px;max-height:85vh;overflow-y:auto;padding:20px 16px;animation:slideUp .3s;box-shadow:0 24px 64px #00000080}.modal h3{font-size:1.05rem;font-weight:700;margin-bottom:16px}.modal-actions{display:flex;gap:8px;margin-top:16px}.modal-actions .btn{flex:1}.word-editor{display:flex;flex-direction:column;gap:6px;padding:12px;background:#ffffff05;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);margin-bottom:6px}.word-editor .word-inputs{display:grid;grid-template-columns:1fr;gap:6px}.word-editor input{padding:8px 10px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:var(--radius-xs);color:var(--text-primary);font-size:.82rem;font-family:inherit;outline:none;transition:all .2s}.word-editor input:focus{border-color:var(--accent);background:#8b5cf60d}.word-editor input::placeholder{color:var(--text-muted)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg-primary);position:relative}.auth-page:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse 80% 50% at 50% -20%,rgba(139,92,246,.1),transparent),radial-gradient(ellipse 60% 40% at 100% 100%,rgba(139,92,246,.05),transparent);pointer-events:none}.auth-card{width:100%;max-width:400px;background:var(--bg-glass-strong);backdrop-filter:blur(30px);-webkit-backdrop-filter:blur(30px);border:1px solid var(--border-medium);border-radius:20px;padding:36px 28px;position:relative;z-index:1;box-shadow:0 24px 64px #0006}.auth-header{text-align:center;margin-bottom:32px}.auth-header h1{font-size:2.2rem;font-weight:900;letter-spacing:-.03em;background:linear-gradient(135deg,#fff,#a3a3a3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.auth-header p{color:var(--text-muted);font-size:.9rem}.auth-field{margin-bottom:14px}.auth-field label{display:block;font-size:.8rem;font-weight:600;color:var(--text-secondary);margin-bottom:6px}.auth-field input{width:100%;padding:12px 14px;background:#ffffff08;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.9rem;font-family:inherit;outline:none;transition:all .25s}.auth-field input:focus{border-color:var(--accent);background:#8b5cf60d;box-shadow:0 0 0 3px var(--accent-glow)}.auth-error{background:var(--error-bg);border:1px solid rgba(239,68,68,.2);color:var(--error);padding:10px 14px;border-radius:var(--radius-sm);font-size:.82rem;margin-bottom:14px}.auth-page .btn{margin-top:8px}.auth-footer{text-align:center;margin-top:24px;padding-top:20px;border-top:1px solid var(--border-subtle)}.auth-footer p{color:var(--text-muted);font-size:.82rem;margin-bottom:8px}.auth-link{background:none;border:none;color:var(--accent-light);font-size:.85rem;font-weight:600;cursor:pointer;font-family:inherit;transition:color .2s}.auth-link:hover{color:var(--text-primary)}.toggle-container{display:flex;align-items:center;justify-content:space-between}.toggle{width:44px;height:24px;background:#ffffff14;border:1px solid var(--border-subtle);border-radius:12px;position:relative;cursor:pointer;transition:all .3s}.toggle.active{background:var(--accent);border-color:transparent;box-shadow:0 0 12px var(--accent-glow)}.toggle:after{content:"";position:absolute;top:2px;left:2px;width:18px;height:18px;background:#fff;border-radius:50%;transition:transform .3s;box-shadow:0 2px 4px #0000004d}.toggle.active:after{transform:translate(20px)}.empty-state{text-align:center;padding:48px 24px;color:var(--text-muted)}.page::-webkit-scrollbar{width:3px}.page::-webkit-scrollbar-track{background:transparent}.page::-webkit-scrollbar-thumb{background:#ffffff14;border-radius:2px}.mode-selector{background:var(--bg-secondary);border:1px solid var(--border-medium);border-radius:var(--radius);width:100%;max-width:460px;padding:24px 20px;animation:slideUp .3s;box-shadow:0 24px 64px #00000080}.mode-selector-header{text-align:center;margin-bottom:20px}.mode-selector-header h3{font-size:1.1rem;font-weight:800;letter-spacing:-.02em;background:linear-gradient(135deg,#fff,#a3a3a3);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:4px}.mode-selector-header p{font-size:.8rem;color:var(--text-muted)}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:20px}.mode-card{display:flex;flex-direction:column;align-items:center;text-align:center;gap:6px;padding:20px 12px;border-radius:var(--radius-sm);cursor:pointer;font-family:inherit;transition:all .25s}.mode-card.active{border-color:var(--accent)!important;background:#8b5cf614!important;box-shadow:0 0 20px var(--accent-glow),inset 0 0 20px #8b5cf60d}.mode-card.disabled{opacity:.35;cursor:not-allowed;pointer-events:none}.mode-icon{font-size:1.8rem;display:block;margin-bottom:2px;filter:drop-shadow(0 2px 8px rgba(0,0,0,.3))}.mode-name{font-size:.9rem;font-weight:700;color:var(--text-primary);letter-spacing:-.01em}.mode-desc{font-size:.7rem;color:var(--text-muted);line-height:1.3}.mode-actions{display:flex;gap:8px}.mode-actions .btn{flex:1}.chrono-timer{text-align:center;margin-bottom:12px}.chrono-timer .time{font-size:2.4rem;font-weight:900;letter-spacing:-.03em;font-variant-numeric:tabular-nums;color:var(--text-primary);transition:color .3s}.chrono-timer .time.warning{color:var(--warning);animation:chrono-pulse .8s ease-in-out infinite}.chrono-timer .time.danger{color:var(--error);animation:chrono-pulse .4s ease-in-out infinite}@keyframes chrono-pulse{0%,to{opacity:1}50%{opacity:.5}}.chrono-bar{width:100%;height:6px;background:#ffffff0f;border-radius:3px;overflow:hidden;margin-bottom:16px}.chrono-bar-fill{height:100%;border-radius:3px;transition:width 1s linear,background .5s;background:linear-gradient(90deg,var(--accent),var(--accent-light));box-shadow:0 0 10px var(--accent-glow)}.chrono-bar-fill.warning{background:linear-gradient(90deg,var(--warning),#fbbf24);box-shadow:0 0 10px #eab3084d}.chrono-bar-fill.danger{background:linear-gradient(90deg,var(--error),#f87171);box-shadow:0 0 10px #ef44444d}.test-results{display:flex;flex-direction:column;gap:6px;margin:20px 0}.test-result-row{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-sm)}.test-result-row.correct{background:var(--success-bg);border-color:#22c55e33}.test-result-row.wrong{background:var(--error-bg);border-color:#ef444433}.test-result-row .result-icon{font-size:1rem;min-width:20px;text-align:center}.test-result-row .result-word{flex:1;font-size:.85rem;font-weight:600}.test-result-row .result-answer{font-size:.8rem;color:var(--text-muted);text-decoration:line-through}.test-grade{text-align:center;margin:24px 0 16px}.test-grade .grade-letter{font-size:5rem;font-weight:900;letter-spacing:-.04em;line-height:1}.test-grade .grade-letter.grade-a{background:linear-gradient(135deg,var(--success),#4ade80);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 24px rgba(34,197,94,.4))}.test-grade .grade-letter.grade-b{background:linear-gradient(135deg,var(--info),#60a5fa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 24px rgba(59,130,246,.4))}.test-grade .grade-letter.grade-c{background:linear-gradient(135deg,var(--warning),#fbbf24);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 24px rgba(234,179,8,.4))}.test-grade .grade-letter.grade-d,.test-grade .grade-letter.grade-f{background:linear-gradient(135deg,var(--error),#f87171);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;filter:drop-shadow(0 0 24px rgba(239,68,68,.4))}.test-grade .grade-label{font-size:.85rem;color:var(--text-muted);margin-top:4px}.profile-header{text-align:center;padding:24px 0 16px}.profile-header .profile-avatar{width:72px;height:72px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-light));display:flex;align-items:center;justify-content:center;font-size:2rem;margin:0 auto 12px;border:2px solid var(--border-medium);box-shadow:0 0 24px var(--accent-glow)}.profile-header .profile-name{font-size:1.3rem;font-weight:800;letter-spacing:-.02em}.profile-header .profile-joined{font-size:.75rem;color:var(--text-muted);margin-top:4px}.level-card{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius);padding:20px;margin:16px 0;position:relative;overflow:hidden}.level-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,rgba(139,92,246,.05),transparent 60%);pointer-events:none}.level-card .level-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.level-card .level-number{font-size:1.5rem;font-weight:900;color:var(--accent-light)}.level-card .level-xp{font-size:.8rem;color:var(--text-muted);font-weight:600}.level-card .level-bar{width:100%;height:8px;background:#ffffff0f;border-radius:4px;overflow:hidden}.level-card .level-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--accent-light));border-radius:4px;transition:width .6s ease;box-shadow:0 0 12px var(--accent-glow)}.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0}.stat-card{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:16px;text-align:center}.stat-card .stat-value{font-size:1.5rem;font-weight:900;letter-spacing:-.02em;color:var(--text-primary)}.stat-card .stat-label{font-size:.7rem;color:var(--text-muted);font-weight:600;margin-top:2px}.badge-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0}.badge-card{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:16px 10px;text-align:center;transition:all .25s}.badge-card .badge-icon{font-size:1.6rem;display:block;margin-bottom:6px}.badge-card .badge-name{font-size:.7rem;font-weight:700;color:var(--text-primary)}.badge-card .badge-desc{font-size:.6rem;color:var(--text-muted);margin-top:2px}.badge-card.locked{opacity:.3;filter:grayscale(1)}.badge-card.locked .badge-icon{filter:brightness(.5)}.week-chart{display:flex;align-items:flex-end;justify-content:space-between;gap:6px;height:100px;padding:16px;background:var(--bg-glass);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);margin:16px 0}.week-chart .chart-bar{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px}.week-chart .chart-bar-fill{width:100%;min-height:4px;background:linear-gradient(180deg,var(--accent),var(--accent-light));border-radius:3px 3px 0 0;transition:height .4s ease;box-shadow:0 0 8px var(--accent-glow)}.week-chart .chart-bar-label{font-size:.6rem;color:var(--text-muted);font-weight:600}.audio-btn{background:#ffffff0d;border:1px solid var(--border-subtle);border-radius:var(--radius-xs);width:32px;height:32px;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:.9rem;transition:all .2s;flex-shrink:0}.audio-btn:hover{background:#ffffff1a;border-color:var(--border-medium)}.audio-btn:active{transform:scale(.9)}@media(min-width:768px){.app{max-width:600px}.page{padding:28px 32px 110px}.flashcard{min-height:240px}.flashcard-french .word{font-size:2.2rem}.mode-grid{gap:14px}.mode-card{padding:24px 16px}.stats-grid,.badge-grid{gap:12px}.modal,.mode-selector{max-width:520px;padding:28px 24px}.welcome h2{font-size:2.2rem}.tp-card{padding:22px 24px}.leaderboard-item{padding:14px 20px}}@media(max-width:360px){.page{padding:14px 12px 90px}.welcome h2{font-size:1.5rem}.flashcard-french .word{font-size:1.4rem}.mode-grid{gap:6px}.mode-card{padding:14px 8px}.mode-icon{font-size:1.4rem}.mode-name{font-size:.8rem}.mode-desc{font-size:.6rem}.stats-grid{gap:6px}.badge-grid{grid-template-columns:repeat(3,1fr);gap:6px}.badge-card{padding:12px 6px}.badge-card .badge-icon{font-size:1.3rem}.badge-card .badge-name{font-size:.6rem}.header h1{font-size:1rem}.nav-item{font-size:.6rem}.nav-item svg{width:18px;height:18px}.btn{padding:10px 18px;font-size:.82rem}.chrono-timer .time{font-size:2rem}.test-grade .grade-letter{font-size:4rem}.auth-card{padding:28px 20px}.auth-header h1{font-size:1.8rem}}@supports (padding-top: env(safe-area-inset-top)){.header{padding-top:calc(14px + env(safe-area-inset-top))}}