@import"https://fonts.googleapis.com/css2?family=Lexend:wght@300;400;500;600;700&display=swap";:root{--primary-color: #ee6448;--bg-color: #fbf8f1;--text-color: #2c2c2c;--text-secondary: #666;--border-color: #ddd;--white: #fff}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Lexend,system-ui,-apple-system,sans-serif;background:var(--bg-color);color:var(--text-color)}.access-gate{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--white);padding:24px}.access-gate__card{width:min(420px,100%);background:var(--white);border:1px solid var(--border-color);border-radius:12px;padding:40px;box-shadow:0 12px 32px #16161614;display:flex;flex-direction:column;gap:16px}.access-gate__title{font-size:1.8rem;font-weight:600;text-align:center;color:var(--text-color)}.access-gate__subtitle{font-size:.95rem;color:var(--text-secondary);text-align:center}.access-gate__label{font-size:.85rem;font-weight:500;color:var(--text-secondary)}.access-gate__input{padding:12px 14px;border:1px solid var(--border-color);border-radius:8px;font-size:1rem;background:var(--bg-color);transition:border-color .2s ease,box-shadow .2s ease}.access-gate__input:focus{border-color:var(--primary-color);box-shadow:0 0 0 3px #ee64482e;outline:none}.access-gate__error{color:var(--primary-color);font-size:.85rem}.access-gate__submit{width:100%;margin-top:16px}.access-gate__submit.btn-primary{background:#1f6feb;border-color:#1f6feb}.access-gate__submit.btn-primary:hover:not(:disabled){background:#195cc7;border-color:#195cc7}img,video{max-width:100%;display:block}button{font:inherit}.page{min-height:100vh;background:var(--bg-color);padding:40px 20px}.page-header{text-align:center;margin-bottom:48px}.page-title{color:var(--text-color);font-size:2.5rem;margin-bottom:12px;font-weight:500}.page-subtitle{color:var(--text-secondary);font-size:1.1rem;font-weight:400}.grid{display:grid;gap:20px;max-width:1200px;margin:0 auto}.grid-auto-fit{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}.card{background:var(--white);border:1px solid var(--border-color);border-radius:4px;padding:24px;transition:border-color .2s ease,transform .2s ease}.card-clickable{cursor:pointer}.card-clickable:hover{border-color:var(--primary-color);transform:translateY(-2px)}.card-title{color:var(--text-color);margin-bottom:12px;font-size:1.4rem;font-weight:500}.card p{color:var(--text-secondary);line-height:1.6;margin-bottom:16px}.text-muted{color:var(--text-secondary)}.stat-row{display:flex;gap:16px;font-size:.9rem;color:var(--text-secondary)}.stat-row span{display:flex;align-items:center;gap:4px}.layout{display:flex;min-height:100vh;background:var(--bg-color)}.layout-content{flex:1;margin-left:260px;padding:20px;transition:margin-left .3s ease}.sidebar.is-closed~.layout-content{margin-left:0}.sidebar-toggle{position:fixed;left:0;top:calc(76px + (100vh - 76px)/2);transform:translateY(-50%);background:var(--white);border:1px solid var(--border-color);border-left:none;border-radius:0 8px 8px 0;padding:10px 8px;cursor:pointer;z-index:110;color:var(--text-color);transition:all .3s ease;box-shadow:2px 2px 8px #00000014;display:flex;align-items:center;justify-content:center}.sidebar-toggle.is-open{left:260px}.sidebar-toggle:hover{background:var(--bg-color)}.sidebar-toggle-icon{width:20px;height:20px;transition:transform .3s ease}.sidebar-toggle.is-open .sidebar-toggle-icon{transform:rotate(180deg)}.sidebar{position:fixed;left:0;top:76px;height:calc(100vh - 76px);width:260px;background:var(--white);border-right:1px solid var(--border-color);overflow-y:auto;transition:transform .3s ease;z-index:90}.sidebar.is-closed{transform:translate(-100%)}.sidebar-header{padding:20px 16px;border-bottom:1px solid var(--border-color);background:var(--white);display:flex;flex-direction:column;gap:12px;align-items:flex-start}.sidebar-title{color:var(--text-color);font-size:1rem;font-weight:500;margin:0}.sidebar-back-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 0;font-size:.9rem;width:100%;justify-content:flex-start}.sidebar-back-icon{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:6px;background:var(--bg-color);transition:background .2s ease,filter .2s ease;transform:rotate(180deg)}.sidebar-back-icon img{width:16px;height:16px}.sidebar-back-btn:hover .sidebar-back-icon{background:var(--primary-color)}.sidebar-back-btn:hover .sidebar-back-icon img{filter:brightness(0) invert(1)}.sidebar-content{padding:8px 0}.sidebar-footer{margin:16px;padding-top:16px;border-top:1px solid var(--border-color)}.sidebar-footer .btn{display:inline-flex}.sidebar-item{display:flex;align-items:center;gap:12px;width:100%;padding:10px 16px;background:none;border:none;border-left:3px solid transparent;cursor:pointer;transition:background .2s ease,border-color .2s ease;text-align:left}.sidebar-item.is-locked,.sidebar-item:disabled{opacity:.5;cursor:not-allowed}.sidebar-item:hover{background:var(--bg-color)}.sidebar-item.is-locked:hover,.sidebar-item:disabled:hover{background:none}.sidebar-item.is-active{background:var(--bg-color);border-left-color:var(--primary-color)}.item-number{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:var(--bg-color);border-radius:6px;font-size:.8rem;color:var(--text-secondary);font-weight:500;flex-shrink:0;position:relative}.sidebar-item.is-active .item-number,.sidebar-item.is-active .item-number.is-completed{background:var(--primary-color);color:var(--white)}.item-number.is-completed{background:var(--bg-color);color:var(--text-secondary)}.item-complete-icon{position:absolute;top:-6px;right:-6px;width:18px;height:18px;background:#2ea44f;color:var(--white);border-radius:999px;display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:600;pointer-events:none}.item-icon{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:var(--bg-color);border-radius:6px;flex-shrink:0;padding:6px;position:relative}.item-icon img{width:100%;height:100%;opacity:.6}.sidebar-item.is-active .item-icon{background:var(--primary-color)}.sidebar-item.is-active .item-icon img{opacity:1;filter:brightness(0) invert(1)}.item-info{display:flex;align-items:center;gap:8px;flex:1;min-width:0}.item-title{color:var(--text-color);font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.content-card{max-width:900px;margin:0 auto;background:var(--white);border-radius:4px;padding:40px;border:1px solid var(--border-color);min-height:400px}.content-title{color:var(--text-color);margin-bottom:32px;padding-bottom:16px;border-bottom:2px solid var(--primary-color);font-weight:500}.chapter-media{margin:32px 0;display:flex;flex-direction:column;gap:12px}.chapter-media__image,.chapter-media__video{width:100%;border-radius:6px;border:1px solid var(--border-color);background:var(--bg-color)}.chapter-media__video{max-height:420px;object-fit:cover}.chapter-media__caption{font-size:.95rem;color:var(--text-secondary)}.chapter-quote{margin:32px 0;padding:24px;border-left:4px solid var(--primary-color);background:#ee644814;font-style:italic}.chapter-quote footer{margin-top:12px;font-size:.9rem;font-style:normal;color:var(--text-secondary)}.loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;color:var(--text-secondary)}.spinner{width:40px;height:40px;border:3px solid var(--border-color);border-top:3px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:16px}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.notice{padding:32px;text-align:center}.notice--error{color:var(--primary-color)}.notice-hint{margin-top:16px;color:var(--text-secondary);font-size:.9rem}.notice-hint code{background:var(--bg-color);padding:2px 6px;border-radius:3px;font-family:monospace}.content-card h1{color:var(--text-color);font-size:1.8rem;margin-top:32px;margin-bottom:16px;font-weight:500}.content-card h2{color:var(--text-color);font-size:1.5rem;margin-top:28px;margin-bottom:14px;padding-bottom:8px;border-bottom:1px solid var(--border-color);font-weight:500}.content-card h3{color:var(--text-color);font-size:1.2rem;margin-top:24px;margin-bottom:12px;font-weight:500}.content-card p{line-height:1.8;margin-bottom:16px;color:var(--text-color)}.content-card ul,.content-card ol{margin-bottom:16px;padding-left:32px}.content-card li{margin-bottom:8px;line-height:1.6}.media-image{max-width:100%;height:auto;border-radius:4px;margin:24px 0;border:1px solid var(--border-color);display:block}.media-video{width:100%;border-radius:4px;margin:24px 0;border:1px solid var(--border-color)}.media-placeholder{background:var(--bg-color);border:1px dashed var(--border-color);border-radius:4px;padding:40px;text-align:center;color:var(--text-secondary);margin:24px 0;font-size:1rem}.code-inline{background:var(--bg-color);padding:2px 6px;border-radius:3px;font-family:Courier New,monospace;font-size:.9em;color:var(--primary-color)}.code-block{background:#282c34;color:#abb2bf;padding:20px;border-radius:4px;overflow-x:auto;margin:20px 0;font-family:Courier New,monospace;line-height:1.5;border:1px solid var(--border-color)}.code-block code{background:none;padding:0;color:inherit;font-size:.95rem;display:block}.table-wrapper{overflow-x:auto;margin:24px 0}.table-wrapper table{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--border-color);border-radius:4px;overflow:hidden}.table-wrapper th{background:var(--bg-color);color:var(--text-color);padding:12px;text-align:left;font-weight:500;border-bottom:1px solid var(--border-color)}.table-wrapper td{padding:12px;border-bottom:1px solid var(--border-color)}.table-wrapper tr:last-child td{border-bottom:none}.content-card blockquote{border-left:3px solid var(--primary-color);padding-left:20px;margin:20px 0;color:var(--text-secondary);font-style:italic}.stack{display:flex;flex-direction:column;gap:var(--stack-gap, 16px)}.stack-sm{--stack-gap: 12px}.stack-md{--stack-gap: 20px}.stack-lg{--stack-gap: 32px}.btn{display:inline-flex;align-items:center;gap:12px;padding:12px 20px;border-radius:4px;border:1px solid var(--border-color);background:var(--white);color:var(--text-color);cursor:pointer;font-size:.95rem;font-weight:400;transition:border-color .2s ease,background-color .2s ease,opacity .2s ease;text-align:left}.btn:hover:not(:disabled){border-color:var(--primary-color)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--primary-color);color:var(--white);border-color:var(--primary-color)}.btn-primary:hover:not(:disabled){opacity:.85}.btn-outline{background:var(--white)}.btn-ghost{background:none;border:none;color:var(--text-secondary);padding-left:0}.btn-ghost:hover{color:var(--primary-color)}.btn-full{width:100%;justify-content:center}.btn-grow{flex:1;min-width:200px}.btn-space-between{justify-content:space-between}.btn-end{margin-left:auto}.btn-icon{color:var(--primary-color);font-size:1.2rem}.btn-primary .btn-icon{color:var(--white)}.meta{display:flex;flex-direction:column;gap:4px}.meta-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;font-weight:500;letter-spacing:.5px}.meta-title{font-size:.95rem;color:var(--text-color);font-weight:400}.btn-primary .meta-label,.btn-primary .meta-title{color:var(--white)}.action-row{display:flex;gap:16px;margin-top:48px;padding-top:32px;border-top:1px solid var(--border-color);flex-wrap:wrap}.chapter-complete-row{margin-top:32px;margin-bottom:16px;display:flex;justify-content:flex-start}.progress{width:100%;height:6px;background:var(--border-color);border-radius:3px;overflow:hidden}.progress__fill{height:100%;background:var(--primary-color);transition:width .3s ease}.question{margin-bottom:32px}.question-text{color:var(--text-color);font-size:1.3rem;margin-bottom:24px;line-height:1.6;font-weight:400}.options-list{display:flex;flex-direction:column;gap:10px}.option-button{display:flex;align-items:center;gap:16px;padding:16px 20px;background:var(--white);border:1px solid var(--border-color);border-radius:4px;cursor:pointer;transition:border-color .2s ease;text-align:left;font-size:1rem}.option-button:hover{border-color:var(--primary-color)}.option-button.is-selected{border-color:var(--primary-color);background:var(--bg-color)}.option-letter{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--bg-color);border-radius:50%;font-weight:500;color:var(--text-secondary);flex-shrink:0}.option-button.is-selected .option-letter{background:var(--primary-color);color:var(--white)}.option-text{flex:1;color:var(--text-color)}.check-mark{color:var(--primary-color);font-size:1.3rem;font-weight:700}.question-dots{display:flex;gap:8px;flex:1;justify-content:center}.dot{width:10px;height:10px;border-radius:50%;background:var(--border-color);border:none;cursor:pointer;transition:transform .2s ease,background .2s ease;padding:0}.dot:hover{transform:scale(1.2)}.dot.is-active{background:var(--primary-color);transform:scale(1.3)}.dot.is-answered{background:var(--text-secondary)}.text-warning{color:var(--primary-color);text-align:center;margin-top:16px;font-weight:400}.panel{border:1px solid var(--border-color);border-radius:4px;padding:24px;background:var(--white)}.panel--padded{padding:40px}.panel--center{text-align:center}.panel--soft{background:var(--bg-color)}.panel h1{color:var(--text-color);margin-bottom:24px;font-weight:500}.result-icon{font-size:3rem;margin-bottom:16px}.score-display{margin:32px 0}.score-circle{width:140px;height:140px;border-radius:50%;background:var(--white);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;border:2px solid var(--border-color)}.score-number{font-size:2.5rem;font-weight:500;color:var(--primary-color)}.panel[data-state=failed] .score-number{color:var(--text-secondary)}.score-text{color:var(--text-secondary);font-size:1rem}.result-message{color:var(--text-color);font-size:1rem;margin-bottom:32px}.panel[data-role=review]{border-left:3px solid var(--border-color)}.panel[data-role=review][data-state=correct]{border-left-color:var(--text-color);background:var(--bg-color)}.panel[data-role=review][data-state=incorrect]{border-left-color:var(--primary-color);background:var(--bg-color)}.review-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.question-number{font-weight:500;color:var(--text-secondary);font-size:.9rem}.badge{padding:4px 12px;border-radius:3px;font-size:.8rem;font-weight:400}.badge[data-state=correct]{background:var(--text-color);color:var(--white)}.badge[data-state=incorrect]{background:var(--primary-color);color:var(--white)}.review-question{color:var(--text-color);font-size:1rem;margin-bottom:12px;font-weight:400}.review-answers{display:flex;flex-direction:column;gap:8px}.answer-item{padding:10px;border-radius:3px;font-size:.9rem;background:var(--white);border:1px solid var(--border-color)}.answer-item[data-state=correct]{background:var(--bg-color);color:var(--text-color);border-color:var(--text-color)}@media(max-width:768px){.page{padding:24px 16px}.page-title{font-size:2rem}.grid{grid-template-columns:1fr}.layout{flex-direction:column;min-height:100vh}.layout-content{margin-left:0;padding:16px}.sidebar-toggle{top:calc(56px + (100vh - 56px)/2)}.sidebar-toggle.is-open{left:min(80vw,260px)}.sidebar{width:min(80vw,260px);top:56px;height:calc(100vh - 56px);padding:12px 0 20px}.sidebar-header{padding:16px}.content-card{padding:24px 20px}.action-row{flex-direction:column;margin-top:32px;padding-top:24px}.btn-grow{min-width:auto}.question-text{font-size:1.2rem}.option-button{padding:12px 16px}.question-dots{order:-1;width:100%;margin-bottom:16px}.action-row button{width:100%}}.app-header{background:var(--white);border-bottom:1px solid var(--border-color);padding:10px 0;position:sticky;top:0;z-index:100}.header-content{max-width:1100px;margin:0 auto;padding:0 16px;display:flex;align-items:center;gap:16px;position:relative;min-height:56px}.header-logo{display:flex;align-items:center}.header-logo-box{display:flex;align-items:center;justify-content:center;border-radius:10px;padding:10px 22px;height:60px;aspect-ratio:171 / 42;overflow:hidden}.header-logo img{height:100%;width:auto;display:block}.header-title{position:absolute;left:50%;transform:translate(-50%);font-size:1.1rem;font-weight:500;color:var(--text-color);margin:0;text-align:center}.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}.header-link-btn{background:transparent;border:1px solid var(--border-color);padding:8px 12px;border-radius:6px;font-size:.9rem;cursor:pointer;transition:all .2s}.header-link-btn:hover{background:var(--bg-color);border-color:var(--primary-color);color:var(--primary-color)}.header-logout-btn{background:transparent;border:1px solid var(--border-color);padding:8px 16px;border-radius:6px;color:var(--text-color);font-size:.9rem;cursor:pointer;transition:all .2s}.header-logout-btn:hover{background:var(--bg-color);border-color:var(--primary-color);color:var(--primary-color)}@media(max-width:768px){.header-title{font-size:1rem}.header-logo-box{height:48px;padding:8px 18px}.header-actions{gap:6px}.header-link-btn{padding:6px 10px;font-size:.8rem}.header-logout-btn{padding:6px 12px;font-size:.8rem}}.courses-list{max-width:1200px;margin:0 auto;display:flex;flex-direction:column;gap:16px}.course-item{background:var(--white);border:1px solid var(--border-color);border-radius:4px;padding:20px 24px;display:flex;justify-content:space-between;align-items:center;gap:20px;transition:border-color .2s ease}.courses-list{width:min(100%,760px);margin:0 auto;display:flex;flex-direction:column;gap:20px}.course-item{background:var(--white);border:1px solid var(--border-color);border-radius:16px;padding:18px 20px;display:flex;justify-content:space-between;align-items:center;gap:20px;transition:border-color .2s ease,transform .2s ease}.course-item:hover{border-color:var(--primary-color);transform:translateY(-2px)}.course-item-info{display:flex;flex-direction:column;gap:6px;flex:1}.course-item-title{font-size:1.15rem;font-weight:500;color:var(--text-color);margin:0}.course-item-meta{font-size:.85rem;color:var(--text-secondary)}.course-item-btn{flex-shrink:0;width:auto;padding:10px 20px}.no-courses-message{text-align:center;color:var(--text-secondary);font-size:1rem;margin-top:2rem}.modal-overlay{position:fixed;inset:0;background:#00000073;display:flex;align-items:center;justify-content:center;padding:20px;z-index:200}.modal{width:min(640px,100%);background:var(--white);border-radius:12px;border:1px solid var(--border-color);box-shadow:0 20px 60px #0003;padding:28px 32px;max-height:90vh;overflow-y:auto}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.modal-close{border:none;background:transparent;font-size:1.5rem;cursor:pointer;line-height:1}.account-info-section{margin-top:24px}.account-info-section h3{margin-bottom:8px;font-size:1.05rem}.account-info-section dl{display:grid;grid-template-columns:160px 1fr;row-gap:6px;column-gap:10px;font-size:.95rem}.account-info-section ul{padding-left:16px;line-height:1.5}.account-info-raw{background:#111;color:#f4f4f4;padding:16px;border-radius:8px;font-size:.85rem;overflow-x:auto}.modal-actions{margin-top:24px;display:flex;justify-content:flex-end;gap:12px}.btn-danger{background:#b3261e;border-color:#b3261e;color:var(--white)}.btn-danger:hover:not(:disabled){opacity:.85}@media(max-width:600px){.modal{padding:20px}.account-info-section dl{grid-template-columns:1fr}}