*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--navy: #0A1628;--navy2: #122040;--blue: #1A56DB;--blue-light: #EBF1FF;--blue-mid: #C7D9FF;--gold: #F5A623;--gold-light: #FEF3D7;--green: #0E9F6E;--green-light: #E3F8F0;--red: #E02424;--red-light: #FDE8E8;--amber: #D97706;--amber-light: #FEF3C7;--gray-50: #F9FAFB;--gray-100: #F3F4F6;--gray-200: #E5E7EB;--gray-300: #D1D5DB;--gray-400: #9CA3AF;--gray-500: #6B7280;--gray-700: #374151;--gray-900: #111827;--white: #FFFFFF;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow-md: 0 4px 16px rgba(0,0,0,.1);--shadow-lg: 0 8px 32px rgba(0,0,0,.12);--font-display: "DM Serif Display", Georgia, serif;--font-body: "DM Sans", system-ui, sans-serif;--transition: all .18s 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.nav-icon{transform:scale(1.1)}.dashboard-main{padding-bottom:72px!important}.desktop-tab-nav{display:none!important}}.flashcard-container{touch-action:pan-y;user-select:none;-webkit-user-select:none}.flashcard-swipe-hint{display:none}@media(max-width:768px){.flashcard-swipe-hint{display:flex;justify-content:center;gap:20px;font-size:12px;color:var(--gray-400);margin-top:8px}.flashcard-btn{padding:16px 20px!important;font-size:15px!important;border-radius:14px!important;min-height:54px!important}.flashcard-inner{min-height:220px!important;padding:28px 20px!important}}@media(max-width:768px){.notes-section{margin-bottom:14px!important}details summary{padding:10px 0;font-size:14px!important}.definition-item{padding-left:10px!important;margin-bottom:12px!important}.exam-tip{padding:10px 12px!important;font-size:14px!important}}@media(max-width:768px){.topic-row,.chapter-header{padding:14px 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::-webkit-scrollbar-thumb{background:#353847;border-radius:3px}[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:#4b5563}