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#00000059}.toast-success{color:#fff;background:#10b981}.toast-error{color:#fff;background:#ef4444}.toast-info{color:#fff;background:#3b82f6}.deck-card:focus-visible,.lesson-card:focus-visible,.mode-tab:focus-visible,button:focus-visible{outline-offset:2px;outline:2px solid #10b981}button:active:not(:disabled){transform:scale(.98)}.deck-card:active,.lesson-card:active{transform:scale(.99)}.deck-card,.lesson-card{transition:background-color .2s,border-color .2s,box-shadow .2s}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.mode-content-fade{opacity:1;animation:none;transform:none}.app-modal-backdrop,.app-modal-panel,.skeleton-shimmer,.toast{animation:none}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#1f2937}::-webkit-scrollbar-thumb{background:#4b5563;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#6b7280}.flashcard-viewer-container{box-sizing:border-box;flex-direction:column;flex:1;width:100%;max-width:48rem;height:100%;min-height:0;margin:0 auto;padding:24px;display:flex}.flashcard-header{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:12px;display:flex}.flashcard-header .header-actions{flex-wrap:wrap;gap:8px;width:100%;min-width:0;display:flex}.flashcard-btn-ghost{color:#d1d5db;cursor:pointer;background:#1f2937cc;border:1px solid #374151;border-radius:8px;padding:8px 12px;font-size:13px;transition:background .2s,border-color .2s}.flashcard-btn-ghost:hover{color:#fff;background:#374151}.flashcard-btn-ghost.active{color:#34d399;border-color:#10b981}.flashcard-main{background:#10b9810d;border:1px solid #10b981;border-radius:24px;flex:1;justify-content:center;align-items:center;width:100%;min-width:0;min-height:200px;margin:24px 0;padding:48px 24px;display:flex}.flashcard-text{text-align:center;color:#fff;overflow-wrap:break-word;min-width:0;max-width:100%;font-size:1.5rem;font-weight:500;line-height:1.5}@media (min-width:640px){.flashcard-text{font-size:2rem}}.flashcard-controls{flex-wrap:wrap;justify-content:center;gap:12px;width:100%;max-width:100%;margin:0 auto;display:flex}@keyframes keyboardFlash{0%{filter:brightness();transform:scale(1)}50%{filter:brightness(1.15);transform:scale(1.04)}to{filter:brightness();transform:scale(1)}}.rate-btn{color:#cbd5e1;cursor:pointer;background:#1e293b;border:none;border-radius:12px;flex-direction:column;flex:0 0 140px;justify-content:center;align-items:center;gap:4px;width:140px;min-height:72px;padding:12px 8px 10px;font-size:12px;font-weight:500;transition:color .2s,transform .15s,box-shadow .2s,filter .2s;display:flex;position:relative;box-shadow:inset 2px 2px 4px #0000004d,inset -2px -2px 4px #ffffff08}.rate-btn,.rate-btn:focus{outline:none}.rate-btn:focus-visible{outline-offset:2px;outline:2px solid #10b98173}.rate-btn:hover{filter:brightness(1.06);box-shadow:inset 1px 1px 2px #0006,inset -1px -1px 2px #ffffff0d,0 4px 12px #0000004d}.rate-btn:active:not(:disabled){transform:scale(.98);box-shadow:inset 3px 3px 6px #0006,inset -1px -1px 2px #ffffff05}.rate-btn.flash-active{animation:keyboardFlash .3s ease-out}.rate-btn.btn-again{color:#fca5a5}.rate-btn.btn-good{color:#86efac}.rate-btn.btn-done{color:#6ee7b7;background:#064e3b;box-shadow:inset 2px 2px 4px #00000059,inset -2px -2px 4px #ffffff0a}.rate-btn.btn-done:hover{box-shadow:inset 1px 1px 2px #00000073,inset -1px -1px 2px #ffffff0f,0 4px 12px #00000059}.shortcut-hint{color:#6b7280;background:#00000040;border-radius:4px;padding:2px 6px;font-size:10px;position:absolute;top:4px;left:8px}.flashcard-editor .deck-textarea{color:#e5e7eb;resize:vertical;background:#111827;border:1px solid #374151;border-radius:12px;width:100%;min-height:300px;padding:12px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:14px;line-height:1.5}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-gradient-position{syntax:"*";inherits:false}@property --tw-gradient-from{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-via{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-to{syntax:"<color>";inherits:false;initial-value:#0000}@property --tw-gradient-stops{syntax:"*";inherits:false}@property --tw-gradient-via-stops{syntax:"*";inherits:false}@property --tw-gradient-from-position{syntax:"<length-percentage>";inherits:false;initial-value:0}@property --tw-gradient-via-position{syntax:"<length-percentage>";inherits:false;initial-value:50%}@property --tw-gradient-to-position{syntax:"<length-percentage>";inherits:false;initial-value:100%}@property --tw-leading{syntax:"*";inherits:false}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-duration{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}@property --tw-scale-x{syntax:"*";inherits:false;initial-value:1}@property --tw-scale-y{syntax:"*";inherits:false;initial-value:1}@property --tw-scale-z{syntax:"*";inherits:false;initial-value:1}@keyframes spin{to{transform:rotate(1turn)}}@keyframes pulse{50%{opacity:.5}}