@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";*{margin:0;padding:0;box-sizing:border-box}:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-card: #1e293b;--bg-input: #334155;--text-primary: #f1f5f9;--text-secondary: #94a3b8;--text-muted: #64748b;--accent: #6366f1;--accent-hover: #818cf8;--accent-glow: rgba(99, 102, 241, .3);--success: #22c55e;--success-bg: rgba(34, 197, 94, .15);--error: #ef4444;--error-bg: rgba(239, 68, 68, .15);--warning: #f59e0b;--border: #334155;--radius: 16px;--radius-sm: 10px;--shadow: 0 4px 24px rgba(0, 0, 0, .3)}html,body{height:100%;overflow:hidden}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}#root{height:100%;display:flex;flex-direction:column}.app{height:100%;display:flex;flex-direction:column;max-width:500px;margin:0 auto;width:100%}.page{flex:1;overflow-y:auto;padding:20px 20px 90px;-webkit-overflow-scrolling:touch}.header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--bg-secondary);border-bottom:1px solid var(--border)}.header h1{font-size:1.2rem;font-weight:700;background:linear-gradient(135deg,var(--accent),#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-back{background:none;border:none;color:var(--text-secondary);font-size:1.4rem;cursor:pointer;padding:4px 8px;border-radius:8px;transition:all .2s}.header-back:hover{color:var(--text-primary);background:var(--bg-input)}.bottom-nav{display:flex;background:var(--bg-secondary);border-top:1px solid var(--border);padding:8px 0;padding-bottom:max(8px,env(safe-area-inset-bottom));position:fixed;bottom:0;left:0;right:0;max-width:500px;margin:0 auto;z-index:100}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 4px;background:none;border:none;color:var(--text-muted);font-size:.7rem;font-weight:500;cursor:pointer;transition:color .2s}.nav-item.active{color:var(--accent)}.nav-item svg{width:22px;height:22px}.tp-grid{display:flex;flex-direction:column;gap:12px;margin-top:16px}.tp-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;cursor:pointer;transition:all .25s;position:relative;overflow:hidden}.tp-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),#a78bfa);opacity:0;transition:opacity .25s}.tp-card:hover:before,.tp-card:active:before{opacity:1}.tp-card:active{transform:scale(.98)}.tp-card h3{font-size:1rem;font-weight:600;margin-bottom:6px}.tp-card p{font-size:.85rem;color:var(--text-secondary)}.tp-card .word-count{display:inline-flex;align-items:center;gap:4px;margin-top:10px;padding:4px 10px;background:var(--bg-input);border-radius:20px;font-size:.75rem;color:var(--text-secondary);font-weight:500}.welcome{text-align:center;padding:32px 0 16px}.welcome h2{font-size:1.5rem;font-weight:800;margin-bottom:8px;background:linear-gradient(135deg,var(--accent),#a78bfa,#f472b6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.welcome p{color:var(--text-secondary);font-size:.9rem}.flashcard-container{perspective:1200px;width:100%;margin:20px 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;border:1px solid var(--border)}.flashcard-front{background:linear-gradient(145deg,var(--bg-card),#253049)}.flashcard-back{background:linear-gradient(145deg,var(--bg-card),#253049);transform:rotateY(180deg)}.flashcard-french{text-align:center;margin-bottom:20px}.flashcard-french .label{font-size:.7rem;text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);margin-bottom:8px}.flashcard-french .word{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,#f472b6,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.input-group{display:flex;flex-direction:column;gap:10px;margin-top:auto}.input-row{display:flex;align-items:center;gap:10px}.input-row label{font-size:.75rem;font-weight:600;color:var(--text-secondary);min-width:80px;text-align:right}.input-row input{flex:1;padding:10px 14px;background:var(--bg-input);border:2px solid transparent;border-radius:var(--radius-sm);color:var(--text-primary);font-size:.95rem;font-family:inherit;outline:none;transition:all .2s}.input-row input:focus{border-color:var(--accent);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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.2s;display:flex;align-items:center;justify-content:center;gap:8px;width:100%}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 12px var(--accent-glow)}.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 20px var(--accent-glow)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-input);color:var(--text-primary)}.btn-secondary:hover{background:#475569}.btn-success{background:var(--success);color:#fff}.btn-sm{padding:8px 16px;font-size:.85rem}.study-controls{display:flex;gap:10px;margin-top:16px}.study-controls .btn{flex:1}.progress-bar{width:100%;height:6px;background:var(--bg-input);border-radius:3px;overflow:hidden;margin-bottom:16px}.progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent),#a78bfa);border-radius:3px;transition:width .4s ease}.study-counter{text-align:center;font-size:.85rem;color:var(--text-secondary);margin-bottom:8px}.results-page{text-align:center}.results-score{font-size:4rem;font-weight:800;margin:24px 0 8px}.results-score.good{background:linear-gradient(135deg,var(--success),#4ade80);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.results-score.medium{background:linear-gradient(135deg,var(--warning),#fbbf24);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.results-score.bad{background:linear-gradient(135deg,var(--error),#f87171);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.results-message{font-size:1.1rem;color:var(--text-secondary);margin-bottom:8px}.results-detail{font-size:.85rem;color:var(--text-muted);margin-bottom:32px}.results-actions{display:flex;flex-direction:column;gap:10px}.settings-section{margin-bottom:24px}.settings-section h3{font-size:.9rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}.setting-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:8px}.setting-card label{font-size:.85rem;color:var(--text-secondary);display:block;margin-bottom:8px}.setting-card input[type=text],.setting-card input[type=password],.setting-card textarea{width:100%;padding:10px 14px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.9rem;font-family:inherit;outline:none;transition:border-color .2s}.setting-card input:focus,.setting-card textarea:focus{border-color:var(--accent)}.setting-card textarea{min-height:100px;resize:vertical}.ai-section{margin-top:16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.ai-toggle{width:100%;display:flex;align-items:center;gap:10px;padding:14px 16px;background:none;border:none;color:var(--text-primary);font-size:.9rem;font-weight:600;font-family:inherit;cursor:pointer;text-align:left}.ai-toggle .ai-badge{padding:2px 8px;background:linear-gradient(135deg,var(--accent),#a78bfa);border-radius:12px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.ai-content{padding:0 16px 16px}.ai-response{padding:14px;background:var(--bg-input);border-radius:var(--radius-sm);font-size:.85rem;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:.85rem}.ai-dot{width:6px;height:6px;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 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.2s;font-size:1rem}.btn-icon:hover{background:var(--accent);color:#fff}.btn-icon.danger:hover{background:var(--error)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);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);border-radius:var(--radius);width:100%;max-width:460px;max-height:85vh;overflow-y:auto;padding:24px;animation:slideUp .3s}.modal h3{font-size:1.1rem;margin-bottom:16px}.modal-actions{display:flex;gap:10px;margin-top:20px}.modal-actions .btn{flex:1}.word-editor{display:flex;flex-direction:column;gap:8px;padding:12px;background:var(--bg-primary);border-radius:var(--radius-sm);margin-bottom:8px}.word-editor .word-inputs{display:grid;grid-template-columns:1fr 1fr;gap:6px}.word-editor input{padding:8px 10px;background:var(--bg-input);border:1px solid var(--border);border-radius:8px;color:var(--text-primary);font-size:.85rem;font-family:inherit;outline:none}.word-editor input:focus{border-color:var(--accent)}.word-editor input::placeholder{color:var(--text-muted)}.word-editor .word-remove{align-self:flex-end}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.empty-state{text-align:center;padding:48px 24px;color:var(--text-muted)}.empty-state svg{width:64px;height:64px;margin-bottom:16px;opacity:.5}.toggle-container{display:flex;align-items:center;justify-content:space-between}.toggle{width:48px;height:26px;background:var(--bg-input);border:none;border-radius:13px;position:relative;cursor:pointer;transition:background .3s}.toggle.active{background:var(--accent)}.toggle:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;background:#fff;border-radius:50%;transition:transform .3s}.toggle.active:after{transform:translate(22px)}.page::-webkit-scrollbar{width:4px}.page::-webkit-scrollbar-track{background:transparent}.page::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg-primary)}.auth-card{width:100%;max-width:400px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px}.auth-header{text-align:center;margin-bottom:28px}.auth-header h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--accent),#a78bfa,#f472b6);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px}.auth-header p{color:var(--text-secondary);font-size:.9rem}.auth-field{margin-bottom:16px}.auth-field label{display:block;font-size:.85rem;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.auth-field input{width:100%;padding:12px 14px;background:var(--bg-input);border:2px solid transparent;border-radius:var(--radius-sm);color:var(--text-primary);font-size:.95rem;font-family:inherit;outline:none;transition:border-color .2s}.auth-field input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.auth-error{background:var(--error-bg);border:1px solid rgba(239,68,68,.3);color:var(--error);padding:10px 14px;border-radius:var(--radius-sm);font-size:.85rem;margin-bottom:16px}.auth-page .btn{margin-top:8px}.auth-footer{text-align:center;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}.auth-footer p{color:var(--text-muted);font-size:.85rem;margin-bottom:8px}.auth-link{background:none;border:none;color:var(--accent);font-size:.9rem;font-weight:600;cursor:pointer;font-family:inherit;transition:color .2s}.auth-link:hover{color:var(--accent-hover)}@supports (padding-top: env(safe-area-inset-top)){.header{padding-top:calc(16px + env(safe-area-inset-top))}}