body{font-family:Inter,sans-serif;background-color:#f4f7fa;color:#2d3748;margin:0;-webkit-font-smoothing:antialiased}.header-bg{background:#ffffff;border-bottom:1px solid #e2e8f0;padding:1.2rem 0;margin-bottom:2.5rem;box-shadow:0 2px 4px #00000005}.main-card{background:#ffffff;border-radius:20px;box-shadow:0 10px 25px #0000000d;border:none;overflow:hidden}.table{margin-bottom:0}.table thead th{background-color:#f8fafc;color:#718096;font-size:.75rem;text-transform:uppercase;letter-spacing:.05em;font-weight:700;padding:1rem 1.5rem;border-bottom:1px solid #edf2f7}.table tbody td{padding:1.2rem 1.5rem;vertical-align:middle;border-bottom:1px solid #f1f5f9}.btn-primary-grad{background:linear-gradient(135deg,#6366f1 0%,#a855f7 100%);border:none;color:#fff;padding:.6rem 1.5rem;border-radius:12px;font-weight:600;transition:all .3s ease;box-shadow:0 4px 12px #6366f14d}.btn-primary-grad:hover{transform:translateY(-2px);box-shadow:0 6px 15px #6366f166;opacity:.9;color:#fff}.audio-icon-btn{color:#6366f1;background:#f0f2ff;border:none;width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;transition:all .2s cubic-bezier(.4,0,.2,1);cursor:pointer}.audio-icon-btn:hover{background:#6366f1;color:#fff;transform:scale(1.1)}.audio-icon-btn:active{transform:scale(.95)}.word-img{width:60px;height:60px;border-radius:14px;object-fit:cover;background-color:#f1f5f9;border:2px solid #fff;box-shadow:0 2px 5px #0000001a}.text-secondary.clickable-word:hover{color:#dc3545!important;border-bottom:1px dashed #dc3545}.modal-content{border-radius:24px;border:none;box-shadow:0 20px 40px #00000026}.modal-header{background:linear-gradient(135deg,#6366f1 0%,#a855f7 100%);color:#fff;border-radius:24px 24px 0 0;border:none;padding:1.5rem 2rem}.modal-header .btn-close{filter:brightness(0) invert(1)}.form-control{border-radius:12px;padding:.8rem 1rem;border:2px solid #edf2f7;transition:border-color .2s}.form-control:focus{border-color:#6366f1;box-shadow:none}@media (max-width: 768px){.main-card{border-radius:0}.header-bg .h4{font-size:1.1rem}}.clickable-word{cursor:pointer;color:#2d3748;transition:all .2s ease;border-bottom:2px border transparent;display:inline-block}.clickable-word:hover{color:#6366f1;transform:translateY(-1px)}.clickable-word i{font-size:.8rem;vertical-align:middle}.clickable-word:active{transform:scale(.95)}.top-header{height:50px;position:fixed;top:0;left:0;right:0;z-index:1050;background:#f8fafc}#wrapper{margin-top:50px;display:flex;min-height:calc(100vh - 50px)}.d-flex{display:flex!important;align-items:stretch}#main-wrapper{margin-top:50px;min-height:calc(100vh - 50px);display:flex}.sidebar{width:260px;height:100vh;position:sticky;top:70px;height:calc(100vh - 50px);display:flex;flex-direction:column;background:#f8fafc;border-right:1px solid #edf2f7;flex-shrink:0}.mb-auto{margin-bottom:auto!important}.footer-sidebar{padding:10px 5px;display:block!important;visibility:visible!important}.content-area{flex-grow:1;min-width:0;background:#f8fafc}.sidebar .nav-link{color:#64748b;font-weight:600;padding:12px 15px;border-radius:12px;display:flex;align-items:center;transition:all .3s ease}.sidebar .nav-link:hover{background-color:#f1f5f9;color:#6366f1;transform:translate(5px)}.sidebar .nav-link.active{background-color:#6366f1;color:#fff!important;box-shadow:0 4px 12px #6366f140}.sidebar .nav-link i{font-size:1.1rem;width:25px}.btn-delete{color:#dc3545;background-color:#fff1f2;border:none;padding:8px 12px;border-radius:8px;transition:all .2s ease;opacity:1!important;display:inline-block!important}.btn-delete:hover{background-color:#dc3545;color:#fff;transform:translateY(-2px);box-shadow:0 4px 8px #dc354533}.drop-zone>*{pointer-events:none!important}.drop-zone{width:100%;min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;border:2px dashed #cbd5e0;border-radius:20px;background-color:#fff;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;padding:0;pointer-events:auto!important}.drop-zone--over{border-style:solid;border-color:#6366f1;background-color:#f8faff;transform:scale(1.01)}.drop-zone__prompt{padding:40px;color:#a0aec0;pointer-events:none!important}.drop-zone__prompt *{pointer-events:none!important}.drop-zone__input{display:none}.drop-zone__thumb{width:100%;height:100%;position:absolute;top:0;left:0;background-size:contain;background-position:center;background-repeat:no-repeat;background-color:#fff;z-index:1;pointer-events:none!important;animation:fadeInPreview .4s ease-out}.file-name-badge{position:absolute;bottom:20px;left:50%;transform:translate(-50%);background:rgba(0,0,0,.75);color:#fff;padding:6px 18px;border-radius:50px;font-size:13px;z-index:2;white-space:nowrap;max-width:85%;overflow:hidden;text-overflow:ellipsis;border:1px solid rgba(255,255,255,.2);pointer-events:none!important}@keyframes fadeInPreview{0%{opacity:0;transform:scale(1.05)}to{opacity:1;transform:scale(1)}}.loader-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);z-index:9999;display:flex;align-items:center;justify-content:center;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.btn-loading{pointer-events:none;opacity:.7}.btn-outline-light-custom{background:#ffffff;border:2px solid #f1f5f9;color:#475569;border-radius:16px}.btn-outline-light-custom:hover{border-color:#6366f1;color:#6366f1;background-color:#f8faff;transform:translateY(-3px)}.bg-success-soft{background-color:#ecfdf5}.alert-danger-soft{background-color:#fef2f2}.text-indigo{color:#4f46e5}.transition-all{transition:all .2s ease-in-out}.btn-forgot{background-color:#f8fafc;border:2px solid #e2e8f0;color:#94a3b8;transition:all .3s cubic-bezier(.4,0,.2,1);border-radius:12px}.btn-forgot:hover{background-color:#fff7ed;border-color:#fb923c;color:#ea580c;transform:translateY(-2px);box-shadow:0 4px 12px #fb923c26}.btn-forgot i{font-size:1.1rem}.btn-circle-lg{width:120px;height:120px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;transition:all .3s ease}.btn-circle-lg:hover{transform:scale(1.05)}.btn-circle-lg.active{transform:scale(.9)!important;background-color:#0a58ca!important}.pulse-blue{animation:pulse-blue-shadow 2s infinite}@keyframes pulse-blue-shadow{0%{box-shadow:0 0 #0d6efdb3}70%{box-shadow:0 0 0 20px #0d6efd00}to{box-shadow:0 0 #0d6efd00}}.btn-circle-lg.btn-danger{background-color:#dc3545}.pulse-red{animation:pulse-red-shadow 2s infinite}@keyframes pulse-red-shadow{0%{box-shadow:0 0 #dc3545b3}70%{box-shadow:0 0 0 25px #dc354500}to{box-shadow:0 0 #dc354500}}@media (max-width: 768px){.sidebar{width:80px}.sidebar span,.sidebar hr,.sidebar div{display:none}.sidebar .nav-link i{margin:0;font-size:1.4rem}.display-1{font-size:2.5rem!important}.display-2{font-size:2rem!important}.display-1,.display-2{margin-bottom:1.5rem!important}.main-card{padding:1.5rem!important}.main-card{margin-top:10px!important;border-radius:15px!important}.quiz-option-btn{font-size:.95rem;padding-top:.75rem!important;padding-bottom:.75rem!important}.img-fluid{max-width:100%;height:auto}.small-mobile-font{font-size:.85rem}.table-sm th,.table-sm td{padding-left:8px!important;padding-right:8px!important}.fa-star{font-size:.7rem!important}.text-end{width:40px}}@keyframes bounce{0%{transform:scale(1)}to{transform:scale(1.2)}}