*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #FEFCF3;--bg-card: #FFFFFF;--text: #2D3436;--text-light: #636E72;--primary: #6C5CE7;--primary-light: #A29BFE;--success: #00B894;--danger: #E17055;--warning: #FDCB6E;--radius: 16px;--radius-sm: 10px;--shadow: 0 4px 20px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 40px rgba(0, 0, 0, .1);--font: "Inter", system-ui, -apple-system, sans-serif;--max-width: 480px}html{font-size:16px}body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100dvh;-webkit-font-smoothing:antialiased}#root{min-height:100dvh;display:flex;justify-content:center}@keyframes fadeSlideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.animate-in{animation:fadeSlideUp .3s ease-out}.loading-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100dvh;gap:24px}.loading-logo{font-size:2.5rem;font-weight:800;background:linear-gradient(135deg,var(--primary),#fd79a8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.loading-spinner{width:32px;height:32px;border:3px solid #eee;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}.btn{border:none;border-radius:var(--radius-sm);font-family:var(--font);font-weight:600;cursor:pointer;transition:all .15s ease;font-size:.95rem;padding:10px 20px}.btn:hover{transform:translateY(-1px);filter:brightness(1.05)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--primary);color:#fff}.btn-secondary{background:#f0edff;color:var(--primary)}.btn-large{padding:16px 40px;font-size:1.1rem;border-radius:var(--radius)}.btn-small{padding:6px 12px;font-size:.8rem}.btn-back{background:transparent;color:var(--primary);padding:8px 12px}.btn-link{background:none;color:var(--text-light);text-decoration:underline;padding:8px}.btn-danger{background:var(--danger);color:#fff}.btn-correct{background:var(--success);color:#fff;padding:14px 28px;font-size:1rem}.btn-wrong{background:#f0f0f0;color:var(--text);padding:14px 28px;font-size:1rem}.btn-extension{background:#2d3436;color:#fff;display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:14px}.btn-cat-learn{background:var(--cat-color, var(--primary));color:#fff;font-size:.85rem;padding:6px 16px}.btn-cat-quiz{background:transparent;border:2px solid var(--cat-color, var(--primary));color:var(--cat-color, var(--primary));font-size:.85rem;padding:4px 14px}.btn-nav{background:#f0f0f0;color:var(--text);padding:12px 24px}.input-field{width:100%;padding:14px 16px;border:2px solid #E8E8E8;border-radius:var(--radius-sm);font-size:1rem;font-family:var(--font);transition:border-color .2s;background:var(--bg-card)}.input-field:focus{outline:none;border-color:var(--primary)}.welcome-container{display:flex;align-items:center;justify-content:center;min-height:100dvh;padding:24px;width:100%;max-width:var(--max-width)}.welcome-card{background:var(--bg-card);border-radius:var(--radius);padding:40px 28px;box-shadow:var(--shadow-lg);width:100%;display:flex;flex-direction:column;align-items:center;gap:20px;text-align:center}.welcome-logo{display:flex;flex-direction:column;gap:4px}.logo-text{font-size:2.8rem;font-weight:800;background:linear-gradient(135deg,#6c5ce7,#fd79a8,#fdcb6e);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.logo-subtitle{font-size:1rem;color:var(--text-light);font-weight:500}.welcome-desc{color:var(--text-light);line-height:1.6;font-size:.95rem}.welcome-buttons{display:flex;flex-direction:column;gap:12px;width:100%;margin-top:8px}.backup-warning{color:var(--danger);font-weight:500;font-size:.9rem;line-height:1.5}.nsec-display{background:#f8f8f8;border-radius:var(--radius-sm);padding:16px;width:100%;word-break:break-all}.nsec-text{display:block;font-size:.8rem;line-height:1.5;margin-bottom:12px;color:var(--text)}.nsec-actions{display:flex;gap:8px;justify-content:center}.checkbox-label{display:flex;align-items:center;gap:8px;font-size:.9rem;color:var(--text-light);cursor:pointer}.checkbox-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary)}.login-options{width:100%;display:flex;flex-direction:column;gap:16px}.login-section{display:flex;flex-direction:column;gap:10px;text-align:left}.login-section label{font-size:.85rem;font-weight:600;color:var(--text-light)}.login-divider{display:flex;align-items:center;gap:12px;color:var(--text-light);font-size:.85rem}.login-divider:before,.login-divider:after{content:"";flex:1;height:1px;background:#e8e8e8}.extension-icon{font-size:1.1rem}.error-text{color:var(--danger);font-size:.85rem}.home-container{width:100%;max-width:var(--max-width);padding:20px 16px 40px}.home-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.header-left{display:flex;align-items:baseline;gap:8px}.app-title{font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,#6c5ce7,#fd79a8);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-subtitle{font-size:.8rem;color:var(--text-light)}.avatar-btn{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#fd79a8);color:#fff;font-weight:700;font-size:1rem;border:none;cursor:pointer;transition:transform .15s}.avatar-btn:hover{transform:scale(1.05)}.stats-bar{display:flex;justify-content:space-between;background:var(--bg-card);border-radius:var(--radius);padding:16px 12px;box-shadow:var(--shadow);margin-bottom:16px}.stat-item{display:flex;flex-direction:column;align-items:center;gap:2px}.stat-value{font-size:1.3rem;font-weight:700;color:var(--primary)}.stat-label{font-size:.65rem;color:var(--text-light);text-transform:uppercase;letter-spacing:.5px}.progress-bar-container{margin-bottom:24px}.progress-bar{height:8px;background:#ededee;border-radius:4px;overflow:hidden;margin-bottom:6px}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),#fd79a8);border-radius:4px;transition:width .5s ease}.progress-text{font-size:.75rem;color:var(--text-light)}.section-title{font-size:1.1rem;font-weight:700;margin-bottom:12px}.category-grid{display:flex;flex-direction:column;gap:12px}.category-card{background:var(--bg-card);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow);border-left:4px solid var(--cat-color, #ccc);transition:transform .15s}.category-card:hover{transform:translate(2px)}.category-card.complete{opacity:.85}.cat-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:4px}.cat-emoji{font-size:1.3rem}.cat-progress{font-size:.8rem;color:var(--text-light);font-weight:600}.cat-name{font-size:1rem;font-weight:600;margin-bottom:8px}.cat-bar{height:4px;background:#f0f0f0;border-radius:2px;overflow:hidden;margin-bottom:12px}.cat-bar-fill{height:100%;background:var(--cat-color, var(--primary));border-radius:2px;transition:width .3s ease}.cat-actions{display:flex;gap:8px}.learn-container,.quiz-container{width:100%;max-width:var(--max-width);padding:20px 16px 40px;min-height:100dvh}.learn-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.learn-header h2{font-size:1.1rem;font-weight:700}.learn-counter{font-size:.85rem;color:var(--text-light);font-weight:600}.learn-progress-bar{height:4px;background:#ededee;border-radius:2px;overflow:hidden;margin-bottom:32px}.learn-progress-fill{height:100%;border-radius:2px;transition:width .3s ease}.flashcard-area{perspective:800px;margin-bottom:24px;transition:transform .2s ease,opacity .2s ease}.flashcard-area.left{transform:translate(-30px);opacity:0}.flashcard-area.right{transform:translate(30px);opacity:0}.flashcard{width:100%;min-height:280px;position:relative;cursor:pointer;transform-style:preserve-3d;transition:transform .5s ease}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;inset:0;backface-visibility:hidden;background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;gap:12px;border:3px solid var(--card-color, #eee)}.flashcard-back{transform:rotateY(180deg)}.word-level{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:1px}.word-circassian{font-size:2.4rem;font-weight:800;color:var(--text);text-align:center}.word-pronunciation{font-size:1rem;color:var(--text-light);font-style:italic}.word-divider{width:60px;height:2px;background:#eee;margin:4px 0}.word-english{font-size:1.6rem;font-weight:700;color:var(--primary);text-align:center}.tap-hint{font-size:.8rem;color:#ccc;margin-top:8px}.rate-buttons,.nav-buttons{display:flex;gap:12px;justify-content:center;margin-bottom:24px}.word-dots{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;padding:16px 0}.word-dot{width:10px;height:10px;border-radius:50%;transition:all .2s}.word-dot.active{transform:scale(1.5);box-shadow:0 0 6px #0003}.quiz-question{text-align:center;margin-bottom:24px}.quiz-prompt{font-size:.9rem;color:var(--text-light);margin-bottom:16px}.quiz-word{display:flex;flex-direction:column;align-items:center;gap:6px}.word-english-large{font-size:1.8rem;font-weight:700;color:var(--text)}.quiz-options{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}.quiz-option{width:100%;padding:16px;background:var(--bg-card);border:2px solid #E8E8E8;border-radius:var(--radius-sm);font-size:1.05rem;font-family:var(--font);font-weight:500;cursor:pointer;transition:all .15s;text-align:left}.quiz-option:hover:not(:disabled){border-color:var(--primary);background:#f7f5ff}.quiz-option.correct{border-color:var(--success);background:#e8faf0;color:var(--success)}.quiz-option.wrong{border-color:var(--danger);background:#fff0ed;color:var(--danger)}.quiz-next{display:flex;justify-content:center}.quiz-results{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60dvh;text-align:center;gap:16px}.results-emoji{font-size:4rem;animation:pulse 1s ease-in-out infinite}.results-score{display:flex;flex-direction:column;gap:4px}.score-big{font-size:3rem;font-weight:800;color:var(--primary)}.score-percent{font-size:1.1rem;color:var(--text-light)}.results-buttons{margin-top:16px}.profile-container{width:100%;max-width:var(--max-width);padding:20px 16px 40px}.profile-card,.profile-stats-card{background:var(--bg-card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);margin-bottom:16px}.profile-avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#fd79a8);color:#fff;font-size:1.6rem;font-weight:700;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}.profile-field{margin-bottom:16px}.profile-field label{display:block;font-size:.8rem;font-weight:600;color:var(--text-light);text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.profile-edit-row{display:flex;gap:8px}.profile-edit-row .input-field{flex:1}.key-display{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.key-text{font-size:.8rem;color:var(--text-light);word-break:break-all}.key-warning{font-size:.75rem;color:var(--danger);margin-top:4px}.profile-stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0}.profile-stat{text-align:center}.profile-stat-value{display:block;font-size:1.4rem;font-weight:700;color:var(--primary)}.profile-stat-label{font-size:.7rem;color:var(--text-light);text-transform:uppercase}.sync-btn{width:100%;margin-top:8px}.profile-danger{text-align:center;padding:16px 0}.logout-confirm{background:var(--bg-card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}.logout-confirm p{font-size:.9rem;color:var(--danger);margin-bottom:12px}.logout-buttons{display:flex;gap:8px;justify-content:center}.header-right{display:flex;align-items:center;gap:8px}.btn-lang-toggle{background:#f0edff;color:var(--primary);font-weight:700;font-size:.8rem;padding:6px 12px;border-radius:20px;border:2px solid var(--primary-light)}.arabic-text{font-family:Inter,Noto Sans Arabic,system-ui,sans-serif;direction:rtl;font-size:1.8rem}.word-english.arabic-text{font-size:1.8rem}.word-english-large.arabic-text{font-size:2rem}.quiz-option.arabic-text{text-align:right;direction:rtl;font-size:1.1rem}.rtl{direction:rtl}.rtl .category-card{border-left:none;border-right:4px solid var(--cat-color, #ccc)}.rtl .category-card:hover{transform:translate(-2px)}.rtl .quiz-option{text-align:right}.rtl .stat-label{text-transform:none;letter-spacing:0}@media(min-width:480px){.category-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}}