:root{--color-primary: #E07A5F;--color-primary-dark: #C66248;--color-primary-light: #F2CC8F;--color-secondary: #3D405B;--color-secondary-dark: #2A2C3E;--color-secondary-light: #6D708B;--color-accent: #81B29A;--color-accent-dark: #5F8D75;--color-background: #F4F1DE;--color-surface: #FFFFFF;--color-text: #3D405B;--color-text-light: #7D8096;--color-error: #D64045;--color-success: #81B29A;--color-warning: #F2CC8F;--font-family-body: "Outfit", system-ui, -apple-system, sans-serif;--font-family-display: "Poppins", "Outfit", system-ui, sans-serif;--font-family-arabic: "IBM Plex Sans Arabic", "Noto Sans Arabic", sans-serif;--font-weight-light: 300;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--font-weight-extrabold: 800;--font-weight-black: 900;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--font-size-5xl: 3rem;--line-height-tight: 1.25;--line-height-snug: 1.375;--line-height-normal: 1.5;--line-height-relaxed: 1.625;--line-height-loose: 2;--letter-spacing-tight: -.025em;--letter-spacing-normal: 0;--letter-spacing-wide: .025em;--letter-spacing-wider: .05em;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-12: 3rem;--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);--shadow-card: 0 8px 0 rgba(0,0,0,.1);--radius-sm: .25rem;--radius-md: .5rem;--radius-lg: 1rem;--radius-full: 9999px;--transition-fast: .2s ease;--transition-normal: .3s ease}@media(prefers-color-scheme:dark){:root{--color-background: #1a1a1a;--color-surface: #2d2d2d;--color-text: #ececec;--color-text-light: #a0a0a0}}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-family-body);background-color:var(--color-background);color:var(--color-text);font-size:var(--font-size-base);line-height:var(--line-height-normal);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}[lang=ar]{font-family:var(--font-family-arabic);direction:rtl}#root{min-height:100vh;display:flex;flex-direction:column;max-width:600px;margin:0 auto;background-color:var(--color-surface);box-shadow:var(--shadow-2xl)}@media(min-width:640px){#root{margin:2rem auto;border-radius:var(--radius-lg);min-height:calc(100vh - 4rem);height:auto;overflow:hidden}}a{color:inherit;text-decoration:none}button{font-family:var(--font-family-display);font-weight:var(--font-weight-semibold);cursor:pointer;transition:all var(--transition-fast)}h1,h2,h3,h4,h5,h6{font-family:var(--font-family-display);font-weight:var(--font-weight-bold);line-height:var(--line-height-tight);letter-spacing:var(--letter-spacing-tight);margin:0}h1{font-size:var(--font-size-4xl);font-weight:var(--font-weight-extrabold)}h2{font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold)}h3{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold)}h4{font-size:var(--font-size-xl)}.text-display{font-family:var(--font-family-display)}.text-body{font-family:var(--font-family-body)}.text-arabic{font-family:var(--font-family-arabic)}.font-bold{font-weight:var(--font-weight-bold)}.font-semibold{font-weight:var(--font-weight-semibold)}.font-medium{font-weight:var(--font-weight-medium)}.flashcard-container{perspective:1000px;width:100%;height:400px;cursor:pointer}.flashcard{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s;transform-style:preserve-3d;box-shadow:var(--shadow-xl);border-radius:var(--radius-xl)}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;border-radius:var(--radius-xl);display:flex;flex-direction:column;justify-content:center;align-items:center;padding:var(--spacing-8);background-color:var(--color-surface);border:2px solid var(--color-border)}.flashcard-front{background-color:#fff;color:var(--color-text)}.front-hint{font-size:var(--font-size-sm);color:var(--color-text-light);text-transform:uppercase;letter-spacing:.1em;margin-bottom:var(--spacing-4)}.front-word{font-size:var(--font-size-4xl);font-weight:700;color:var(--color-primary-dark)}.flashcard-back{background-color:var(--color-primary-light);transform:rotateY(180deg);border-color:var(--color-primary)}.back-arabic{font-family:var(--font-family-arabic);font-size:var(--font-size-5xl);color:var(--color-primary-dark);margin-bottom:var(--spacing-2);direction:rtl}.back-transliteration{font-size:var(--font-size-lg);color:var(--color-text-light);font-style:italic;margin-bottom:var(--spacing-6)}.audio-btn{background:#fff;border:1px solid var(--color-primary);color:var(--color-primary);padding:var(--spacing-2) var(--spacing-4);border-radius:var(--radius-full);font-size:var(--font-size-sm);display:flex;align-items:center;gap:var(--spacing-2);transition:all .2s ease}.audio-btn:hover{background:var(--color-primary);color:#fff}