*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:#2d3748;background-color:#f7fafc}#app{min-height:100vh}.hidden{display:none!important}.loading-spinner{width:32px;height:32px;border:3px solid #e2e8f0;border-top:3px solid #5F7A8A;border-radius:50%;animation:spin 1s linear infinite}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;text-align:center}.loading-container p{margin-top:1rem;color:#718096}.dashboard-nav{background:#fff;border-bottom:1px solid #e2e8f0;padding:.75rem 0;position:sticky;top:0;z-index:100}.nav-brand{display:flex;align-items:center;gap:2rem}.brand-logo-container{display:flex;align-items:center;gap:.75rem}.brand-logo{flex-shrink:0;transition:transform .2s ease}.brand-logo:hover{transform:scale(1.05)}.brand-title.clickable{cursor:pointer;transition:color .2s}.brand-title.clickable:hover{color:#4a6070}.nav-tabs{display:flex;align-items:center;gap:.5rem;margin-left:2rem}.nav-tab{background:none;border:none;color:#4a5568;font-size:.875rem;font-weight:500;cursor:pointer;padding:.5rem 1rem;border-radius:6px;transition:all .2s;position:relative}.nav-tab:hover{background:#edf2f7;color:#2d3748}.nav-tab.active{background:#5f7a8a;color:#fff}.nav-tab.active:hover{background:#4a6070}.back-btn{background:none;border:none;color:#4a5568;font-size:.875rem;cursor:pointer;padding:.5rem;border-radius:4px;transition:all .2s}.back-btn:hover{background:#edf2f7;color:#2d3748}.nav-user,.user-profile-container{display:flex;align-items:center;gap:.75rem}.user-name{font-size:.875rem;color:#4a5568;display:none}.user-avatar-container{position:relative}.user-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;cursor:pointer;transition:all .2s}.user-avatar:hover{transform:scale(1.05);box-shadow:0 2px 8px #00000026}.user-dropdown{position:absolute;top:100%;right:0;background:#fff;border-radius:8px;box-shadow:0 10px 25px #00000026;border:1px solid #e2e8f0;min-width:180px;z-index:1000;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .2s ease;margin-top:8px}.user-dropdown.show{opacity:1;visibility:visible;transform:translateY(0)}.dropdown-item{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;cursor:pointer;transition:background-color .2s;font-size:.875rem;color:#4a5568}.dropdown-item:hover{background:#f7fafc}.dropdown-item:first-child{border-radius:8px 8px 0 0}.dropdown-item:last-child{border-radius:0 0 8px 8px}.dropdown-divider{height:1px;background:#e2e8f0;margin:.25rem 0}.dropdown-icon{font-size:1rem}.logout-btn{background:none;border:none;color:#718096;font-size:.875rem;cursor:pointer;padding:.5rem;border-radius:4px;transition:all .2s}.logout-btn:hover{background:#fed7d7;color:#c53030}.page-with-footer{min-height:100vh;display:flex;flex-direction:column}.page-with-footer main{flex:1}.dashboard-page{min-height:100vh;background:#f7fafc}.dashboard-main{padding:2rem 0}.dashboard-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;flex-direction:column;gap:2rem}.user-info-card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.user-info-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.user-details h2{font-size:1.5rem;font-weight:600;color:#2d3748;margin-bottom:.25rem}.user-email{color:#718096;font-size:.875rem}.credits-info{display:flex;align-items:center;gap:1rem}.credits-display{display:flex;flex-direction:column;align-items:flex-end}.credits-label{font-size:.75rem;color:#718096;text-transform:uppercase;letter-spacing:.05em}.credits-amount{font-size:1.5rem;font-weight:700;color:#5f7a8a}.upload-section{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.upload-title{font-size:1.25rem;font-weight:600;color:#2d3748;margin-bottom:1.5rem}.upload-area{border:2px dashed #cbd5e0;border-radius:8px;padding:3rem 2rem;text-align:center;cursor:pointer;transition:all .3s;background:#f7fafc}.upload-area:hover,.upload-area.drag-over{border-color:#5f7a8a;background:#f0f4f8}.upload-content{display:flex;flex-direction:column;align-items:center;gap:1rem}.upload-icon{font-size:3rem;color:#a0aec0}.upload-text{font-size:1rem;color:#4a5568;margin:0}.upload-note{font-size:.875rem;color:#718096;margin:0}.upload-progress{margin-top:1.5rem;padding:1rem;background:#f7fafc;border-radius:8px}.progress-bar-container{width:100%;height:8px;background:#e2e8f0;border-radius:4px;overflow:hidden;margin-bottom:.75rem}.progress-bar{height:100%;background:linear-gradient(90deg,#5f7a8a,#4a6070);border-radius:4px;transition:width .3s ease;width:0%}.upload-status{font-size:.875rem;color:#4a5568;text-align:center;margin:0}.processing-status{background:linear-gradient(135deg,#ebf8ff,#bee3f8);border:1px solid #90cdf4;border-radius:12px;padding:1.5rem}.processing-content{display:flex;align-items:center;gap:1rem}.processing-spinner{width:24px;height:24px;border:2px solid #D5E0E8;border-top:2px solid #5F7A8A;border-radius:50%;animation:spin 1s linear infinite;flex-shrink:0}.processing-text h4{font-size:1rem;font-weight:600;color:#2c5282;margin-bottom:.25rem}.processing-details{font-size:.875rem;color:#2a69ac;margin:0}.recent-exams-section{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem}.question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:.75rem;border-bottom:1px solid #e2e8f0;gap:1rem}.section-title{font-size:1.25rem;font-weight:600;color:#2d3748;margin:0}.section-actions{display:flex;gap:.75rem}.refresh-btn,.view-all-btn{background:none;border:1px solid #cbd5e0;color:#4a5568;font-size:.875rem;padding:.5rem 1rem;border-radius:6px;cursor:pointer;transition:all .2s}.refresh-btn:hover,.view-all-btn:hover{background:#edf2f7;border-color:#a0aec0}.btn-primary{background:#5f7a8a;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;gap:.5rem}.btn-primary:hover{background:#4a6070}.btn-secondary{background:#edf2f7;color:#4a5568;border:1px solid #cbd5e0;padding:.75rem 1.5rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s}.btn-secondary:hover{background:#e2e8f0}.btn-danger{background:#8a7070;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s}.btn-danger:hover{background:#7a6060}.btn-danger-outline{background:none;color:#8a7070;border:1px solid #8A7070;padding:.5rem 1rem;border-radius:6px;font-size:.875rem;cursor:pointer;transition:all .2s}.btn-danger-outline:hover{background:#e8dcdc}.btn-warning{background:#a09080;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s}.btn-warning:hover{background:#8a8070}.btn-icon{font-size:1rem}.exams-list,.exams-grid{display:flex;flex-direction:column;gap:1rem}.recent-exams-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-top:1rem}@media (max-width: 1024px){.recent-exams-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.recent-exams-grid{grid-template-columns:1fr}}#recent-exams-list .exam-card{background:#fff;border:1px solid #e2e8f0;border-radius:8px;padding:1.5rem;transition:all .2s;box-shadow:0 1px 3px #0000001a;margin-bottom:1rem}#recent-exams-list .exam-card:hover{box-shadow:0 4px 12px #00000026;transform:translateY(-2px)}#recent-exams-list .exam-card .exam-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem;gap:.5rem}#recent-exams-list .exam-card .exam-filename{font-size:1rem;font-weight:600;color:#2d3748;margin:0;line-height:1.4;flex:1}#recent-exams-list .exam-card .exam-meta{margin-bottom:1rem}#recent-exams-list .exam-card .exam-actions{display:flex;width:100%}#recent-exams-list .exam-card .exam-actions button{width:100%;padding:.75rem 1rem;font-size:.875rem;font-weight:500;border-radius:6px;border:none;cursor:pointer;transition:all .2s ease}#recent-exams-list .exam-card .exam-actions .btn-primary{background:#3182ce;color:#fff}#recent-exams-list .exam-card .exam-actions .btn-primary:hover{background:#2c5282}#recent-exams-list .exam-card .exam-actions .btn-warning{background:#ed8936;color:#fff}#recent-exams-list .exam-card .exam-actions .btn-warning:hover{background:#dd6b20}#recent-exams-list .exam-card .exam-actions .btn-secondary{background:#e2e8f0;color:#4a5568}#recent-exams-list .exam-card .exam-actions .btn-secondary:disabled{opacity:.6;cursor:not-allowed}.exam-item,.exam-card{background:#f7fafc;border:1px solid #e2e8f0;border-radius:8px;padding:1rem;transition:all .2s}.exam-item:hover,.exam-card:hover{background:#fff;box-shadow:0 2px 8px #0000001a}.exam-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem;gap:1rem}.exam-info{flex:1}.exam-filename{font-size:1rem;font-weight:600;color:#2d3748;margin-bottom:.25rem;word-break:break-word}.exam-date{font-size:.875rem;color:#718096}.exam-status{flex-shrink:0}.status-badge{display:inline-block;padding:.25rem .75rem;border-radius:12px;font-size:.75rem;font-weight:500;text-transform:uppercase;letter-spacing:.05em}.status-pending{background:#d5e0e8;color:#3a4a58}.status-processing{background:#eae5dc;color:#5a4a38}.status-completed{background:#d8e5dc;color:#3a5040}.status-failed{background:#e8dcdc;color:#5a3a3a}.exam-actions{display:flex;gap:.5rem;margin-top:.75rem;flex-wrap:wrap}.history-page .exam-actions .btn-primary,.history-page .exam-actions .btn-secondary,.history-page .exam-actions .btn-warning{width:100%;justify-content:center}.view-btn{background:#5f7a8a;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;font-size:.875rem;cursor:pointer;transition:all .2s}.view-btn:hover{background:#4a6070}.empty-state,.error-state{text-align:center;padding:3rem 2rem}.empty-icon,.error-icon{font-size:4rem;margin-bottom:1rem}.empty-title,.error-title{font-size:1.25rem;font-weight:600;color:#2d3748;margin-bottom:.5rem}.empty-text,.error-text{color:#718096;margin-bottom:1.5rem}.empty-subtext{color:#a0aec0;font-size:.875rem;margin-bottom:1.5rem}.history-page{min-height:100vh;background:#f7fafc}.history-main{padding:2rem 0}.history-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;flex-direction:column;gap:2rem}.history-header{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 1px 3px #0000001a;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.page-title{font-size:1.75rem;font-weight:700;color:#2d3748;margin-bottom:.25rem}.page-description{color:#718096;margin:0}.header-actions{display:flex;gap:.75rem}.history-filters{background:#fff;border-radius:12px;padding:1rem 1.5rem;box-shadow:0 1px 3px #0000001a;display:flex;gap:1rem;flex-wrap:nowrap;align-items:center}.filter-group,.search-group{display:flex;align-items:center;gap:.5rem}.filter-label{font-size:1rem;font-weight:500;min-width:80px;color:#4a5568}.filter-select,.search-input{padding:.5rem .75rem;border:1px solid #cbd5e0;border-radius:6px;font-size:.875rem;background:#fff}.filter-select{min-width:120px;margin-left:.5rem}.search-input{min-width:200px}.search-btn{background:#5f7a8a;color:#fff;border:none;padding:.5rem;border-radius:6px;cursor:pointer;transition:all .2s}.search-btn:hover{background:#4a6070}.exam-detail-page{min-height:100vh;background:#f7fafc}.exam-detail-main{padding:2rem 0}.exam-detail-container{max-width:1000px;margin:0 auto;padding:0 1.5rem}.exam-content{background:#fff;border-radius:12px;box-shadow:0 1px 3px #0000001a;overflow:hidden}.exam-header{padding:1.5rem;border-bottom:1px solid #e2e8f0;display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.exam-title{font-size:1.5rem;font-weight:700;color:#2d3748;margin-bottom:.5rem}.exam-meta{display:flex;align-items:center;gap:.5rem;font-size:.875rem;color:#718096}.separator{color:#cbd5e0}.question-count{font-weight:500}.questions-container{padding:1.5rem;display:flex;flex-direction:column;gap:2rem}.question-item{border:1px solid #e2e8f0;border-radius:8px;overflow:hidden}.question-header{background:#f7fafc;padding:1rem 1.5rem;border-bottom:1px solid #e2e8f0;display:flex;justify-content:space-between;align-items:center}.question-title-wrapper{display:flex;align-items:center;gap:.75rem;flex:1}.question-checkbox{width:18px;height:18px;cursor:pointer;accent-color:#5F7A8A}.question-number{font-size:1.125rem;font-weight:600;color:#2d3748;margin:0;cursor:pointer}.question-tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-left:.5rem}.question-tag{background:#e6f3ff;color:#1a365d;padding:.25rem .75rem;border-radius:12px;font-size:.75rem;font-weight:500;border:1px solid #bee3f8;white-space:nowrap}.copy-question-btn{background:#5f7a8a;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;font-size:.875rem;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:.5rem}.copy-question-btn:hover{background:#4a6070}.question-group,.question-body,.question-options,.question-answer,.question-solution{padding:1.5rem}.question-group{border-top:1px solid #f1f5f9;background:#f0f8ff}.question-options{border-top:1px solid #f1f5f9;background:#fafafa}.question-answer{border-top:1px solid #f1f5f9;background:#f0fff4}.question-solution{border-top:1px solid #f1f5f9;background:#fffbf0}.group-title,.options-title,.answer-title,.solution-title{font-size:1rem;font-weight:600;color:#2d3748;margin-bottom:1rem}.group-title{color:#1e40af}.options-list{display:flex;flex-direction:column;gap:.75rem}.option-item{background:#fff;border:1px solid #e2e8f0;border-radius:6px;padding:1rem;display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}.option-content-wrapper{display:flex;align-items:flex-start;gap:.5rem;flex:1}.option-label{font-weight:600;color:#5f7a8a;flex-shrink:0;margin-top:.1rem}.option-content{flex:1}.copy-option-btn{background:none;color:#718096;border:none;font-size:.75rem;cursor:pointer;padding:.25rem .5rem;border-radius:4px;transition:all .2s}.copy-option-btn:hover{background:#edf2f7;color:#5f7a8a}.content-text{margin-bottom:.75rem;line-height:1.6}.content-math,.content-image{margin:1rem 0;text-align:center}.question-image{max-width:100%;height:auto;border-radius:6px;box-shadow:0 2px 8px #0000001a}.content-table{margin:1rem 0;overflow-x:auto}.question-table{width:100%;border-collapse:collapse;font-size:.875rem}.table-header{background:#f7fafc}.table-cell{padding:.75rem;border:1px solid #e2e8f0;text-align:left}.table-header .table-cell{font-weight:600;color:#2d3748}.modal{position:fixed;top:0;left:0;width:100%;height:100%;z-index:1000;display:flex;align-items:center;justify-content:center}.modal-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{background:#fff;border-radius:12px;padding:2rem;max-width:400px;width:90%;position:relative;z-index:1001;box-shadow:0 20px 40px #0003}.modal-title{font-size:1.25rem;font-weight:600;color:#2d3748;margin-bottom:1rem}.modal-message{color:#4a5568;margin-bottom:2rem;line-height:1.6}.modal-actions{display:flex;gap:.75rem;justify-content:flex-end}.notification{position:fixed;top:1rem;right:1rem;z-index:1100;background:#fff;border-radius:8px;box-shadow:0 4px 12px #00000026;border-left:4px solid #5F7A8A;max-width:400px;animation:slideIn .3s ease-out}.notification-success{border-left-color:#708a78}.notification-error{border-left-color:#8a7070}.notification-warning{border-left-color:#a09080}.notification-content{padding:1rem;display:flex;align-items:center;gap:.75rem}.notification-icon{font-size:1.25rem;flex-shrink:0}.notification-message{font-size:.875rem;color:#2d3748;line-height:1.4}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}.error-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f7fafc}.error-container{text-align:center;padding:2rem;background:#fff;border-radius:12px;box-shadow:0 4px 6px #0000001a;max-width:400px}.error-icon{font-size:4rem;margin-bottom:1rem}.error-title{font-size:1.5rem;font-weight:600;color:#2d3748;margin-bottom:1rem}.error-message{color:#718096;margin-bottom:2rem;line-height:1.6}.error-btn{background:#5f7a8a;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:6px;font-size:1rem;cursor:pointer;transition:all .2s}.error-btn:hover{background:#4a6070}@media (min-width: 768px){.user-name{display:block}.exams-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:1.5rem}.exam-actions{margin-top:1rem}}@media (max-width: 767px) and (min-width: 481px){.history-filters{padding:.75rem 1rem;gap:.75rem}.filter-group,.search-group{gap:.25rem}.search-input{min-width:150px}.filter-select{min-width:100px}}@media (max-width: 767px){.dashboard-container,.history-container,.exam-detail-container,.nav-container{padding:0 1rem}.brand-title{font-size:1.25rem}.user-info-content{flex-direction:column;align-items:flex-start}.credits-info{align-self:stretch;justify-content:space-between}.upload-area{padding:2rem 1rem}.history-header{flex-direction:column;align-items:flex-start}}@media (max-width: 480px){.history-filters{flex-direction:column;align-items:stretch;gap:1rem}.search-input{min-width:auto;flex:1}.exam-header{flex-direction:column;align-items:flex-start}.modal-content{margin:1rem;padding:1.5rem}.modal-actions{flex-direction:column}.notification{top:1rem;right:1rem;left:1rem;max-width:none}}.btn-icon,.modal-header-icon,.info-icon,.list-icon,.tip-icon,.note-icon,.billing-icon,.feature-check,.feature-icon-inline,.suggestion-icon,.dropdown-icon{display:inline-flex;align-items:center;justify-content:center;vertical-align:middle}.btn-icon svg,.modal-header-icon svg,.info-icon svg,.list-icon svg,.tip-icon svg,.note-icon svg,.billing-icon svg,.feature-check svg,.feature-icon-inline svg,.suggestion-icon svg,.dropdown-icon svg{flex-shrink:0}.modal-header-icon,.info-icon,.list-icon{margin-right:.5rem}.tip-icon,.note-icon,.billing-icon{margin-right:.25rem}.feature-check,.feature-icon-inline,.suggestion-icon{margin-right:.5rem}.notification-icon{display:flex;align-items:center;justify-content:center}.upload-icon,.empty-icon,.error-icon,.placeholder-icon,.success-icon,.feature-icon-large{display:flex;align-items:center;justify-content:center;margin-bottom:1rem}.usage-records-page,.membership-page{min-height:100vh;display:flex;flex-direction:column;background:#f7fafc}.usage-records-main,.membership-main{flex:1;padding:2rem 0}.usage-records-container,.membership-container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.page-header{text-align:center;margin-bottom:3rem}.page-title{font-size:2rem;font-weight:700;color:#2d3748;margin-bottom:.5rem}.page-description{font-size:1.125rem;color:#718096;margin:0}.content-placeholder{text-align:center;padding:4rem 2rem;background:#fff;border-radius:12px;box-shadow:0 1px 3px #0000001a;max-width:600px;margin:0 auto}.placeholder-icon{font-size:4rem;margin-bottom:1.5rem}.placeholder-title{font-size:1.5rem;font-weight:600;color:#2d3748;margin-bottom:1rem}.placeholder-text{font-size:1rem;color:#4a5568;margin-bottom:.5rem;line-height:1.6}.placeholder-subtext{font-size:.875rem;color:#718096;margin:0;line-height:1.5}@media (max-width: 767px){.usage-records-container,.membership-container{padding:0 1rem}.page-title{font-size:1.75rem}.page-description{font-size:1rem}.content-placeholder{padding:3rem 1.5rem}.placeholder-icon{font-size:3rem}.placeholder-title{font-size:1.25rem}}.app-footer{background:#2d3748;color:#fff;margin-top:auto}.footer-container{max-width:1200px;margin:0 auto;padding:3rem 1.5rem 2rem}.footer-content{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;margin-bottom:2rem;align-items:flex-start}.footer-section{display:flex;flex-direction:column;align-items:flex-start;height:100%}.footer-title{font-size:1.125rem;font-weight:600;color:#fff;margin:0 0 1rem;text-align:left;width:100%;line-height:1.35;height:1.5rem;display:flex;align-items:flex-start;padding:0}.footer-description{color:#a0aec0;font-size:.875rem;line-height:1.5}.footer-links{list-style:none;padding:0;margin:0}.footer-links li{margin-bottom:.5rem}.footer-link{color:#a0aec0;text-decoration:none;font-size:.875rem;transition:color .2s}.footer-link:hover{color:#fff}.footer-text{color:#a0aec0;font-size:.875rem;margin:0}.footer-bottom{border-top:1px solid #4a5568;padding-top:1rem;text-align:center}.footer-copyright{color:#a0aec0;font-size:.875rem;margin:0}@media (max-width: 1024px) and (min-width: 768px){.footer-content{grid-template-columns:repeat(2,1fr);gap:1.5rem}}@media (max-width: 767px){.footer-content{grid-template-columns:1fr;gap:1.5rem}.footer-container{padding:2rem 1rem 1.5rem}}.app-footer .footer-content{display:flex;align-items:flex-start;gap:2rem}.app-footer .footer-section{flex:1}.app-footer .footer-section:first-child{flex:1.5}.app-footer .footer-title{margin-bottom:1rem;font-size:1.1rem;font-weight:600;color:#e2e8f0}.app-footer .footer-section:not(:first-child) .footer-title{margin-top:.5rem}.app-footer .footer-container{padding:3rem 1.5rem 2rem!important}@media (max-width: 767px){.app-footer .footer-container{padding:2rem 1rem 1.5rem!important}}.social-links{display:flex;gap:1rem;margin-top:.5rem}.social-link{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:#ffffff1a;border-radius:50%;color:#e2e8f0;text-decoration:none;transition:all .3s ease}.social-link:hover{background:#fff3;color:#fff;transform:translateY(-2px)}.social-link svg{width:20px;height:20px}.exam-time-info{display:flex;flex-direction:column;gap:.5rem}.time-item{display:flex;flex-direction:column;gap:.25rem}.time-label{font-size:.875rem;font-weight:500;color:#4a5568}.time-value{font-size:.875rem;color:#2d3748}.membership-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;margin-top:2rem}.membership-card{background:#fff;border-radius:12px;padding:2rem;box-shadow:0 4px 6px #0000001a;border:2px solid transparent;transition:all .3s ease;position:relative;display:flex;flex-direction:column;height:100%}.membership-card:hover{transform:translateY(-4px);box-shadow:0 8px 25px #00000026}.membership-card.current-plan{border-color:#48bb78;background:linear-gradient(135deg,#f0fff4,#c6f6d5)}.membership-card.premium-plan{border-color:#3182ce;background:linear-gradient(135deg,#ebf8ff,#bee3f8)}.membership-card.custom-plan{border-color:#805ad5;background:linear-gradient(135deg,#faf5ff,#e9d8fd)}.membership-card.info-card{border-color:#ed8936;background:linear-gradient(135deg,#fffaf0,#fbd38d)}.card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.card-title{font-size:1.5rem;font-weight:700;color:#2d3748;margin:0}.current-badge{background:#48bb78;color:#fff;padding:.25rem .75rem;border-radius:20px;font-size:.75rem;font-weight:600}.popular-badge{background:#3182ce;color:#fff;padding:.25rem .75rem;border-radius:20px;font-size:.75rem;font-weight:600}.card-content{margin:1.5rem 0;flex-grow:1}.price{margin-bottom:1.5rem}.amount{font-size:2rem;font-weight:700;color:#2d3748}.features{list-style:none;padding:0;margin:0}.features li{padding:.5rem 0;color:#4a5568;font-size:.875rem}.info-content p{margin-bottom:1rem;color:#4a5568;font-size:.875rem;line-height:1.6}.info-content p:last-child{margin-bottom:0}.card-footer{margin-top:auto}.btn-current{width:100%;padding:.75rem 1.5rem;background:#48bb78;color:#fff;border:none;border-radius:8px;font-weight:600;cursor:not-allowed;opacity:.7}.btn-coming-soon{width:100%;padding:.75rem 1.5rem;background:#3182ce;color:#fff;border:none;border-radius:8px;font-weight:600;cursor:not-allowed;opacity:.7}.btn-contact{width:100%;padding:.75rem 1.5rem;background:#805ad5;color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s}.btn-contact:hover{background:#6b46c1;transform:translateY(-1px)}.btn-info{width:100%;padding:.75rem 1.5rem;background:#ed8936;color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s}.btn-info:hover{background:#dd6b20;transform:translateY(-1px)}@media (max-width: 768px){.membership-cards{grid-template-columns:1fr;gap:1.5rem}.membership-card{padding:1.5rem}.social-links{justify-content:center}}.exam-time-info{display:flex;flex-direction:column;gap:.25rem}.time-item{display:inline;font-size:.875rem;color:#4a5568}.time-label{font-weight:500;color:#2d3748}.time-value{color:#4a5568}.pagination-container{display:flex;flex-direction:column;align-items:center;gap:1rem;margin-top:2rem;padding:1.5rem;background:#fff;border-radius:12px;box-shadow:0 1px 3px #0000001a}.pagination-info{color:#4a5568;font-size:.875rem;font-weight:500}.pagination-controls{display:flex;align-items:center;gap:.5rem}.pagination-btn{padding:.5rem 1rem;background:#fff;border:1px solid #e2e8f0;border-radius:8px;color:#4a5568;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease;min-width:80px}.pagination-btn:hover:not(:disabled){background:#f7fafc;border-color:#cbd5e0;color:#2d3748}.pagination-btn:disabled{background:#f7fafc;color:#a0aec0;cursor:not-allowed;opacity:.6}.page-numbers{display:flex;align-items:center;gap:.25rem}.page-btn{width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #e2e8f0;border-radius:8px;color:#4a5568;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s ease}.page-btn:hover{background:#f7fafc;border-color:#cbd5e0;color:#2d3748}.page-btn.active{background:#5f7a8a;border-color:#5f7a8a;color:#fff;font-weight:600}.page-btn.active:hover{background:#4a6070;border-color:#4a6070}.page-ellipsis{padding:0 .5rem;color:#a0aec0;font-size:.875rem;-webkit-user-select:none;user-select:none}@media (max-width: 640px){.pagination-container{padding:1rem}.pagination-controls{flex-direction:column;gap:1rem;width:100%}.pagination-btn{min-width:100px}.page-numbers{order:-1;justify-content:center;flex-wrap:wrap}.page-btn{width:36px;height:36px;font-size:.8125rem}}.question-bank-page{min-height:100vh;background:#f8fafc;display:flex;flex-direction:column}.question-bank-main{flex:1;padding:2rem 0}.question-bank-container{max-width:1200px;margin:0 auto;padding:0 2rem}.question-bank-header{text-align:center;margin-bottom:3rem}.question-bank-header .page-title{font-size:2.5rem;font-weight:700;color:#1a202c;margin-bottom:.5rem}.question-bank-header .page-description{font-size:1.125rem;color:#4a5568;margin:0}.development-section{display:flex;justify-content:center;align-items:center;min-height:400px}.development-card{background:#fff;border-radius:16px;padding:3rem;box-shadow:0 4px 20px #00000014;text-align:center;max-width:600px;width:100%}.development-icon{font-size:4rem;margin-bottom:1.5rem}.development-title{font-size:2rem;font-weight:600;color:#2d3748;margin-bottom:1rem}.development-description{font-size:1.125rem;color:#4a5568;margin-bottom:2rem;line-height:1.6}.development-features{text-align:left;margin-bottom:2rem}.development-features h4{font-size:1.125rem;font-weight:600;color:#2d3748;margin-bottom:1rem}.feature-list{list-style:none;padding:0;margin:0}.feature-list li{padding:.5rem 0;font-size:1rem;color:#4a5568;display:flex;align-items:center;gap:.5rem}.development-actions{margin-top:2rem}@media (max-width: 768px){.question-bank-container{padding:0 1rem}.question-bank-header .page-title{font-size:2rem}.development-card{padding:2rem;margin:0 1rem}.development-title{font-size:1.5rem}.development-description{font-size:1rem}}.question-actions{display:flex;align-items:center;gap:.5rem}.report-question-btn{background:#e11d48;color:#fff;border:none;padding:.5rem;border-radius:8px;cursor:pointer;font-size:.875rem;font-weight:500;transition:all .2s ease;display:flex;align-items:center;justify-content:center;min-width:2.5rem;height:2.5rem;position:relative}.report-question-btn:hover{background:#be185d;transform:translateY(-1px)}.report-question-btn:hover:after{content:"回報問題";position:absolute;top:100%;left:50%;transform:translate(-50%);background:#1f2937;color:#fff;padding:.5rem .75rem;border-radius:6px;font-size:.75rem;white-space:nowrap;z-index:1000;margin-top:.25rem}.report-question-btn:hover:before{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:4px solid transparent;border-bottom-color:#1f2937;margin-top:.125rem}.report-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.report-modal.hidden{display:none}.report-modal-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:#00000080;cursor:pointer}.report-modal-content{position:relative;background:#fff;border-radius:12px;width:90%;max-width:500px;max-height:90vh;overflow-y:auto;box-shadow:0 20px 60px #0000004d}.report-modal-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid #e5e7eb}.report-modal-title{font-size:1.25rem;font-weight:600;color:#1f2937;margin:0}.report-modal-close-btn{background:none;border:none;cursor:pointer;padding:.5rem;border-radius:6px;color:#6b7280;transition:all .2s ease}.report-modal-close-btn:hover{background:#f3f4f6;color:#374151}.report-modal-body{padding:1.5rem}.report-form{display:flex;flex-direction:column;gap:1.25rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-label{font-size:.875rem;font-weight:500;color:#374151}.form-input,.form-select,.form-textarea{padding:.75rem;border:1px solid #d1d5db;border-radius:8px;font-size:.875rem;transition:all .2s ease}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f61a}.form-input:read-only{background:#f9fafb;color:#6b7280}.form-textarea{resize:vertical;min-height:100px}.form-actions{display:flex;justify-content:flex-end;gap:.75rem;margin-top:1rem}.btn-secondary{background:#f3f4f6;color:#374151;border:1px solid #d1d5db;padding:.75rem 1.5rem;border-radius:8px;cursor:pointer;font-size:.875rem;font-weight:500;transition:all .2s ease}.btn-secondary:hover{background:#e5e7eb;color:#1f2937}.btn-primary.disabled{background:#d1d5db;color:#9ca3af;cursor:not-allowed;opacity:.6}.btn-primary.disabled:hover{background:#d1d5db;transform:none}@media (max-width: 768px){.question-actions{gap:.25rem}.report-question-btn{min-width:2rem;height:2rem;padding:.25rem}.report-modal-content{width:95%;margin:1rem}.report-modal-header,.report-modal-body{padding:1rem}.form-actions{flex-direction:column}.btn-secondary,.btn-primary{width:100%;text-align:center}}.landing-page{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:#2d3748}.landing-nav{background:#fffffff2;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid #e2e8f0;position:fixed;top:0;left:0;right:0;z-index:1000;padding:.75rem 0}.nav-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:flex;justify-content:space-between;align-items:center}.nav-brand{display:flex;align-items:center;gap:.75rem}.nav-brand .brand-logo{flex-shrink:0;transition:transform .2s ease}.nav-brand .brand-logo:hover{transform:scale(1.05)}.brand-title{font-size:1.5rem;font-weight:700;color:#5f7a8a;margin:0}.brand-subtitle{font-size:.875rem;color:#718096;display:none}.login-button-container{min-width:120px}.hero-section{background:linear-gradient(135deg,#6b7b8a,#5a6a78);padding:120px 0 80px;color:#fff;overflow:hidden}.hero-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;display:grid;grid-template-columns:1fr;gap:3rem;align-items:center}.hero-content{text-align:center}.hero-title{font-size:2.5rem;font-weight:800;line-height:1.2;margin-bottom:1.5rem}.hero-highlight{color:gold}.hero-description{font-size:1.125rem;opacity:.9;margin-bottom:2rem;max-width:600px;margin-left:auto;margin-right:auto}.hero-features{display:flex;justify-content:center;gap:1rem;margin-bottom:2.5rem;flex-wrap:wrap}.feature-badge{background:#fff3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:.5rem 1rem;border-radius:50px;display:flex;align-items:center;gap:.5rem;font-size:.875rem;font-weight:500}.feature-icon{font-size:1rem}.hero-cta{display:flex;flex-direction:column;align-items:center;gap:1rem}.hero-login-container{min-width:200px}.cta-note{font-size:.875rem;opacity:.8;margin:0}.hero-visual{display:flex;justify-content:center}.demo-card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 20px 40px #0000001a;max-width:400px;width:100%}.demo-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid #e2e8f0}.demo-dots{display:flex;gap:.25rem}.demo-dots span{width:8px;height:8px;border-radius:50%;background:#cbd5e0}.demo-title{font-size:.875rem;font-weight:600;color:#4a5568}.demo-step{display:flex;align-items:center;gap:.75rem;padding:.75rem 0;color:#718096}.demo-step.active{color:#2d3748}.demo-step.processing{color:#3182ce}.step-icon{font-size:1.25rem;width:24px;text-align:center}.step-text{flex:1;font-size:.875rem}.step-status{font-size:.875rem}.processing-spinner{width:12px;height:12px;border:2px solid #e2e8f0;border-top:2px solid #5F7A8A;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.features-section{padding:80px 0;background:#f7fafc}.features-container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.section-title{font-size:2.25rem;font-weight:700;text-align:center;margin-bottom:3rem;color:#2d3748}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-card{background:#fff;padding:2rem;border-radius:12px;text-align:center;box-shadow:0 4px 6px #0000000d;transition:transform .3s ease,box-shadow .3s ease}.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px #0000001a}.feature-icon-large{font-size:3rem;margin-bottom:1rem}.feature-title{font-size:1.25rem;font-weight:600;margin-bottom:1rem;color:#2d3748}.feature-description{color:#718096;line-height:1.6}.how-it-works-section{padding:80px 0;background:#fff}.how-it-works-container{max-width:1000px;margin:0 auto;padding:0 1.5rem}.steps-container{display:flex;align-items:center;justify-content:center;gap:2rem;flex-wrap:wrap}.step-item{display:flex;flex-direction:column;align-items:center;text-align:center;max-width:250px}.step-number{width:60px;height:60px;border-radius:50%;background:linear-gradient(135deg,#6b7b8a,#5a6a78);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin-bottom:1.5rem}.step-title{font-size:1.125rem;font-weight:600;margin-bottom:.75rem;color:#2d3748}.step-description{color:#718096;line-height:1.6}.step-arrow{font-size:1.5rem;color:#cbd5e0;display:none}.cta-section{padding:80px 0;background:linear-gradient(135deg,#5f7a8a,#4a6070);color:#fff;text-align:center}.cta-container{max-width:600px;margin:0 auto;padding:0 1.5rem}.cta-title{font-size:2rem;font-weight:700;margin-bottom:1rem}.cta-description{font-size:1.125rem;opacity:.9;margin-bottom:2rem}.cta-login-container{display:flex;justify-content:center}.landing-footer{background:#2d3748;color:#fff;padding:2rem 0}.footer-container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.footer-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}.footer-brand h3{margin:0 0 .25rem;font-size:1.125rem}.footer-brand p,.footer-info p{margin:0;font-size:.875rem;opacity:.8}@media (min-width: 768px){.brand-subtitle{display:block}.hero-container{grid-template-columns:1fr 1fr;text-align:left}.hero-content{text-align:left}.hero-features{justify-content:flex-start}.hero-cta{align-items:flex-start}.step-arrow{display:block}.steps-container{flex-wrap:nowrap}}@media (min-width: 1024px){.hero-title{font-size:3.5rem}.section-title{font-size:2.5rem}}@media (max-width: 767px){.landing-nav{padding:.5rem 0}.nav-container{padding:0 1rem}.brand-title{font-size:1.25rem}.hero-section{padding:100px 0 60px}.hero-title{font-size:2rem}.hero-description{font-size:1rem}.hero-features{gap:.5rem}.feature-badge{font-size:.75rem;padding:.375rem .75rem}.features-section,.how-it-works-section,.cta-section{padding:60px 0}.section-title{font-size:1.875rem;margin-bottom:2rem}.features-grid{gap:1.5rem}.feature-card{padding:1.5rem}.cta-title{font-size:1.75rem}.footer-content{flex-direction:column;text-align:center}}
