:root{--mko-yellow: #F5C518;--mko-black: #1A1A1A;--mko-white: #FFFFFF;--mko-cream: #FFF8E7;--mko-accent: #E8B800;--mko-gray: #666;--mko-light-gray: #E5E5E5;--mko-shadow: 0 2px 12px rgba(26, 26, 26, .08);--mko-shadow-hover: 0 4px 20px rgba(26, 26, 26, .12);--mko-radius: 16px;--mko-radius-sm: 10px;--mko-transition: .25s ease}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--mko-cream);color:var(--mko-black);min-height:100vh;-webkit-font-smoothing:antialiased}#root{min-height:100vh;display:flex;flex-direction:column}.app-container{flex:1;padding:16px 16px 80px;max-width:480px;margin:0 auto;width:100%}.card{background:var(--mko-white);border-radius:var(--mko-radius);padding:16px;box-shadow:var(--mko-shadow);transition:box-shadow var(--mko-transition)}.card:active{box-shadow:var(--mko-shadow-hover)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border:none;border-radius:var(--mko-radius-sm);font-size:15px;font-weight:600;cursor:pointer;transition:all var(--mko-transition);text-decoration:none}.btn-primary{background:var(--mko-yellow);color:var(--mko-black)}.btn-primary:active{background:var(--mko-accent)}.btn-outline{background:transparent;color:var(--mko-black);border:2px solid var(--mko-light-gray)}.btn-outline:active{border-color:var(--mko-yellow);background:var(--mko-cream)}.btn-full{width:100%}.tab-bar{position:fixed;bottom:0;left:0;right:0;background:var(--mko-white);border-top:1px solid var(--mko-light-gray);display:flex;justify-content:space-around;padding:8px 0;padding-bottom:env(safe-area-inset-bottom,8px);z-index:100}.tab-bar a{display:flex;flex-direction:column;align-items:center;gap:4px;text-decoration:none;color:var(--mko-gray);font-size:11px;font-weight:500;padding:4px 12px;transition:color var(--mko-transition)}.tab-bar a.active,.tab-bar a.active .tab-icon{color:var(--mko-yellow)}.tab-icon{font-size:22px;line-height:1}.page-header{text-align:center;margin-bottom:20px}.page-header h1{font-size:22px;font-weight:700;color:var(--mko-black)}.page-header p{font-size:13px;color:var(--mko-gray);margin-top:4px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mode-card{background:var(--mko-white);border-radius:var(--mko-radius);padding:20px 16px;box-shadow:var(--mko-shadow);text-align:center;cursor:pointer;text-decoration:none;color:var(--mko-black);transition:all var(--mko-transition)}.mode-card:active{transform:scale(.97);box-shadow:var(--mko-shadow-hover)}.mode-card .mode-icon{font-size:32px;margin-bottom:8px}.mode-card .mode-title{font-size:14px;font-weight:600}.mode-card .mode-desc{font-size:11px;color:var(--mko-gray);margin-top:4px}.search-box{width:100%;padding:12px 16px;border:2px solid var(--mko-light-gray);border-radius:var(--mko-radius-sm);font-size:15px;background:var(--mko-white);outline:none;transition:border-color var(--mko-transition)}.search-box:focus{border-color:var(--mko-yellow)}.accordion-item{background:var(--mko-white);border-radius:var(--mko-radius);box-shadow:var(--mko-shadow);margin-bottom:10px;overflow:hidden}.accordion-header{padding:14px 16px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:15px}.accordion-header .arrow{transition:transform var(--mko-transition);font-size:12px;color:var(--mko-gray)}.accordion-header .arrow.open{transform:rotate(180deg)}.accordion-body{padding:0 16px 14px;font-size:13px;line-height:1.6;color:var(--mko-gray)}.abv-badge{display:inline-block;background:var(--mko-cream);color:var(--mko-accent);padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}.quiz-options{display:flex;flex-direction:column;gap:10px;margin-top:20px}.quiz-option{padding:14px 16px;border:2px solid var(--mko-light-gray);border-radius:var(--mko-radius-sm);background:var(--mko-white);font-size:15px;text-align:left;cursor:pointer;transition:all var(--mko-transition)}.quiz-option:active{border-color:var(--mko-yellow)}.quiz-option.correct{border-color:#4caf50;background:#e8f5e9}.quiz-option.wrong{border-color:#f44336;background:#ffebee}.quiz-option.disabled{pointer-events:none;opacity:.7}.flashcard-wrapper{perspective:1000px;cursor:pointer;margin:20px 0}.flashcard{position:relative;width:100%;min-height:240px;transition:transform .6s;transform-style:preserve-3d}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;inset:0;backface-visibility:hidden;background:var(--mko-white);border-radius:var(--mko-radius);box-shadow:var(--mko-shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;text-align:center}.flashcard-back{transform:rotateY(180deg)}.flashcard-face h2{font-size:20px;margin-bottom:8px}.flashcard-face p{font-size:14px;color:var(--mko-gray);line-height:1.5}.flashcard-hint{font-size:12px;color:var(--mko-gray);text-align:center;margin-top:8px}.matching-container{display:grid;grid-template-columns:1fr 1fr;gap:10px}.match-column{display:flex;flex-direction:column;gap:8px}.match-item{padding:12px;border:2px solid var(--mko-light-gray);border-radius:var(--mko-radius-sm);background:var(--mko-white);font-size:13px;text-align:center;cursor:pointer;transition:all var(--mko-transition);min-height:56px;display:flex;align-items:center;justify-content:center}.match-item.selected{border-color:var(--mko-yellow);background:var(--mko-cream)}.match-item.matched{border-color:#4caf50;background:#e8f5e9;pointer-events:none}.match-item.wrong-flash{border-color:#f44336;background:#ffebee}.progress-bar{height:6px;background:var(--mko-light-gray);border-radius:3px;overflow:hidden;margin-bottom:16px}.progress-fill{height:100%;background:var(--mko-yellow);border-radius:3px;transition:width var(--mko-transition)}.stat-card{background:var(--mko-white);border-radius:var(--mko-radius);padding:16px;box-shadow:var(--mko-shadow);display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.stat-label{font-size:14px;font-weight:500}.stat-value{font-size:18px;font-weight:700;color:var(--mko-yellow)}.back-btn{display:inline-flex;align-items:center;gap:6px;background:none;border:none;font-size:14px;color:var(--mko-gray);cursor:pointer;margin-bottom:12px;padding:4px 0}.score-display{text-align:center;padding:24px}.score-display .score-number{font-size:48px;font-weight:700;color:var(--mko-yellow)}.score-display .score-label{font-size:14px;color:var(--mko-gray);margin-top:4px}.chip-row{display:flex;gap:8px;overflow-x:auto;padding-bottom:8px;margin-bottom:12px;-webkit-overflow-scrolling:touch}.chip{white-space:nowrap;padding:8px 14px;border-radius:20px;font-size:13px;font-weight:500;border:1.5px solid var(--mko-light-gray);background:var(--mko-white);cursor:pointer;transition:all var(--mko-transition)}.chip.active{background:var(--mko-yellow);border-color:var(--mko-yellow);color:var(--mko-black)}