:root{color-scheme:light dark;--color-primary: #4ECDC4;--color-primary-dark: #3BA99E;--color-secondary: #ec4899;--color-background: #f8fafc;--color-surface: #ffffff;--color-text: #0f172a;--color-text-muted: #64748b;--color-border: #e2e8f0;--card-quiz: #fce7f3;--card-learn: #dbeafe;--card-sentences: #dcfce7;--card-history: #ffedd5;--card-speak: #f1f5f9;--card-irregular: #ede9fe;--card-accent: #fef3c7;--card-shadow: rgba(0, 0, 0, .05);--color-success: #22c55e;--color-warning: #eab308;--color-error: #ef4444;--radius-lg: 1.5rem;--radius-md: 1rem;--radius-sm: .5rem;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);font-family:Inter,system-ui,sans-serif}@media(prefers-color-scheme:dark){:root{--color-background: #0f172a;--color-surface: #1e293b;--color-text: #f8fafc;--color-text-muted: #94a3b8;--color-border: #334155;--card-quiz: #831843;--card-learn: #172554;--card-sentences: #052e16;--card-history: #431407;--card-speak: #334155;--card-irregular: #2e1065;--card-accent: #451a03;--card-shadow: rgba(0, 0, 0, .3)}img[style*="mix-blend-mode: multiply"]{mix-blend-mode:normal!important;filter:brightness(.9) contrast(1.1)}}*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}body{background-color:var(--color-background);color:var(--color-text);min-height:100vh;-webkit-font-smoothing:antialiased;user-select:none;-webkit-user-select:none;overscroll-behavior-y:contain}input,textarea,select{user-select:text;-webkit-user-select:text;pointer-events:auto!important}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:all .2s;border:none;font-size:1rem}.btn-primary{background-color:var(--color-primary);color:#fff}.btn-primary:active{transform:scale(.98)}.btn-secondary{background-color:transparent;border:2px solid var(--color-text-muted);color:var(--color-text-muted)}.bottom-nav-link{transition:all .2s ease!important}.bottom-nav-link:hover{color:var(--color-primary)!important;transform:translateY(-2px)}.bottom-nav-link:hover svg{color:var(--color-primary)!important}