/* ToolCMS V3.1.82 (c) ToolWorld https://www.toolworld.cn/ */
*{box-sizing:border-box;margin:0;padding:0}
body{margin:0;padding:0;font-family:inherit;background:transparent;color:var(--text-1,#333);font-size:14px;line-height:1.6}
.study-flashcards-container{max-width:100%;margin:0 auto;padding:16px}
.study-flashcards-deckbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:8px}
.study-flashcards-decknum{font-size:20px;font-weight:700;color:var(--primary,var(--primary-hover))}
.study-flashcards-deckmeta{font-size:12px;color:var(--text-3,#94a3b8)}
.study-flashcards-progressbar{height:6px;background:var(--bg-soft,#eef2f7);border-radius:99px;overflow:hidden;margin-top:6px}
.study-flashcards-progressfill{height:100%;background:var(--primary,var(--primary-hover));width:0;transition:width .3s}
.study-flashcards-stage{perspective:1400px;margin:4px auto 14px}
.study-flashcards-card{position:relative;width:100%;height:250px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.4,.2,.2,1);cursor:pointer}
.study-flashcards-card.flipped{transform:rotateY(180deg)}
.study-flashcards-face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:24px;border-radius:var(--radius,16px);backface-visibility:hidden;-webkit-backface-visibility:hidden;border:1px solid var(--border,#e2e8f0);box-shadow:0 8px 24px rgba(15,23,42,.08)}
.study-flashcards-front{background:var(--bg-card,#fff)}
.study-flashcards-back{background:linear-gradient(135deg,var(--primary,var(--primary-hover)),var(--primary-hover));color:#fff;transform:rotateY(180deg)}
.study-flashcards-facetag{font-size:11px;letter-spacing:2px;opacity:.7;margin-bottom:14px}
.study-flashcards-facetext{font-size:22px;font-weight:600;text-align:center;word-break:break-word}
.study-flashcards-back .study-flashcards-facetext{font-size:20px}
.study-flashcards-tiphint{margin-top:18px;font-size:12px;color:var(--text-3,#94a3b8)}
.study-flashcards-back .study-flashcards-tiphint{color:rgba(255,255,255,.8)}
.study-flashcards-reviewctl{display:flex;gap:10px;justify-content:center;margin-bottom:10px}
.study-flashcards-judge{display:flex;gap:10px;justify-content:center;margin-bottom:16px}
.study-flashcards-btn{padding:9px 16px;border:1px solid var(--border,#d1d5db);border-radius:var(--radius-sm,8px);background:var(--bg-card,#fff);color:var(--text-1,#333);cursor:pointer;font-size:13px;transition:background .15s,transform .1s}
.study-flashcards-btn:hover{background:var(--primary-light)}

.study-flashcards-btn:active{transform:scale(.97)}

.study-flashcards-btn-primary{background:var(--primary,var(--primary-hover));color:#fff;border-color:var(--primary,var(--primary-hover))}
.study-flashcards-btn-primary:hover{background:var(--primary-light);color:var(--primary)}

.study-flashcards-btn-known{background:var(--success,#16a34a);color:#fff;border-color:var(--success,#16a34a)}
.study-flashcards-btn-known:hover{background:#15803d;color:var(--primary)}

.study-flashcards-btn-again{background:var(--warning,#d97706);color:#fff;border-color:var(--warning,#d97706)}
.study-flashcards-btn-again:hover{background:#b45309;color:var(--primary)}

.study-flashcards-addbox{background:var(--bg-card,#fff);border:1px dashed var(--border,#cbd5e1);border-radius:var(--radius,14px);padding:14px;margin-bottom:14px}
.study-flashcards-addtitle{font-weight:600;font-size:13px;color:var(--text-2,#555);margin-bottom:10px}
.study-flashcards-addrow{display:flex;gap:8px}
.study-flashcards-input{flex:1;min-width:0;padding:9px 12px;border:1px solid var(--border,#d1d5db);border-radius:var(--radius-sm,8px);font-size:14px;background:var(--bg-card,#fff);color:var(--text-1,#333);outline:none}
.study-flashcards-input:focus{border-color:var(--primary,var(--primary-hover))}
.study-flashcards-toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.study-flashcards-message{margin-top:8px;padding:8px 12px;border-radius:var(--radius-sm,8px);font-size:13px;display:none}
.study-flashcards-message.show{display:block}
.study-flashcards-message.success{background:var(--primary-light);color:var(--primary,var(--primary-hover))}
.study-flashcards-message.error{background:var(--error-bg,#fee2e2);color:var(--error,#991b1b)}
.study-flashcards-listbox{margin-top:16px}
.study-flashcards-list{display:flex;flex-direction:column;gap:8px}
.study-flashcards-chip{display:flex;justify-content:space-between;align-items:center;gap:10px;background:var(--bg-card,#fff);border:1px solid var(--border-light,#eef2f7);border-radius:var(--radius-sm,8px);padding:9px 12px;cursor:pointer;transition:border-color .15s}
.study-flashcards-chip:hover{border-color:var(--error,#dc2626)}
.study-flashcards-chip-mastered{border-left:3px solid var(--success,#16a34a)}
.study-flashcards-chiptext{font-size:13px;color:var(--text-2,#555);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.study-flashcards-chipdel{font-size:12px;color:var(--error,#dc2626);flex-shrink:0}
.study-flashcards-footer{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding-top:12px;border-top:1px solid var(--border-light,#f1f5f9);font-size:12px;color:var(--text-3,#94a3b8)}
.study-flashcards-footer-right{margin-left:auto}
@media(max-width:640px){.study-flashcards-container{padding:12px}.study-flashcards-card{height:210px}.study-flashcards-facetext{font-size:18px}.study-flashcards-addrow{flex-direction:column}.study-flashcards-btn{flex:1 1 auto;padding:9px 8px}.study-flashcards-footer{flex-direction:column;gap:4px;text-align:center}}