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var(--color-border);border-radius:var(--radius-xl);padding:var(--space-8);width:100%;max-width:420px;box-shadow:var(--shadow-lg)}.login-header{text-align:center;margin-bottom:var(--space-8)}.login-logo{justify-content:center;align-items:center;gap:var(--space-2);margin-bottom:var(--space-3);display:flex}.login-logo__icon{font-size:28px}.login-logo__text{font-size:var(--font-size-2xl);font-weight:var(--font-weight-bold);margin:0}.login-subtitle{color:var(--color-text-secondary);font-size:var(--font-size-base);margin:0}.login-form{gap:var(--space-1);flex-direction:column;display:flex}.login-footer{margin-top:var(--space-6);text-align:center;font-size:var(--font-size-xs);color:var(--color-text-tertiary);line-height:1.6}.skeleton{background:linear-gradient(90deg, var(--color-surface-hover) 25%, var(--color-border-light) 50%, var(--color-surface-hover) 75%);border-radius:var(--radius-md);background-size:200% 100%;animation:1.5s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.ltree{font-size:var(--font-size-base);margin:0;padding:0;list-style:none}.ltree--root{padding:var(--space-1) 0}.ltree__item{list-style:none}.ltree__row{border-radius:var(--radius-md);cursor:pointer;-webkit-user-select:none;user-select:none;border-left:3px solid #0000;align-items:center;gap:8px;margin-bottom:1px;padding:7px 10px;transition:all .15s;display:flex;position:relative}.ltree__row:hover{background:var(--color-surface-hover)}.ltree__row--selected{background:var(--color-primary-light);border-left-color:var(--color-primary)}.ltree__row--selected .ltree__label{font-weight:var(--font-weight-medium);color:var(--color-primary-hover)}.ltree__row--selected .ltree__icon{color:var(--color-primary)!important}.ltree__row--folder .ltree__label{font-weight:var(--font-weight-medium);color:var(--color-text-primary)}.ltree__toggle{width:18px;height:18px;color:var(--color-text-tertiary);flex-shrink:0;justify-content:center;align-items:center;transition:transform .15s;display:flex}.ltree__toggle--hidden{visibility:hidden}.ltree__toggle--open{transform:rotate(90deg)}.ltree__icon{width:18px;height:18px;color:var(--color-text-tertiary);flex-shrink:0;justify-content:center;align-items:center;display:flex}.ltree__icon--video{color:#ef4444}.ltree__icon--audio{color:#8b5cf6}.ltree__icon--document{color:#f59e0b}.ltree__icon--notes{color:#3b82f6}.ltree__icon--folder{color:var(--color-text-tertiary)}.ltree__label{white-space:normal;word-break:break-word;min-width:0;font-size:var(--font-size-sm);color:var(--color-text-secondary);flex:1;line-height:1.3}.ltree__count{background:var(--color-surface-hover);color:var(--color-text-tertiary);border-radius:var(--radius-full);min-width:20px;height:18px;font-size:11px;font-weight:var(--font-weight-medium);flex-shrink:0;justify-content:center;align-items:center;padding:0 6px;display:inline-flex}.ltree__children{border-left:1px solid var(--color-border-light);margin-left:14px;padding-left:14px}.cv__type-label{font-size:12px;font-weight:var(--font-weight-medium);color:var(--color-text-tertiary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-4);background:var(--color-surface-hover);border-radius:var(--radius-full);align-items:center;gap:6px;padding:4px 10px;display:inline-flex}.cv__video{border-radius:var(--radius-lg);height:0;box-shadow:var(--shadow-md);background:#000;padding-bottom:56.25%;position:relative;overflow:hidden}.cv__video iframe{border:none;width:100%;height:100%;position:absolute;inset:0}.cv__audio-card{background:var(--color-surface-hover);border-radius:var(--radius-lg);padding:var(--space-5);gap:var(--space-3);flex-direction:column;display:flex}.cv__audio-accent{height:4px;margin-bottom:var(--space-1);background:linear-gradient(90deg,#8b5cf6,#ec4899);border-radius:2px}.cv__audio-meta{font-size:var(--font-size-sm);color:var(--color-text-secondary);font-weight:var(--font-weight-medium);align-items:center;gap:8px;display:flex}.cv__audio-card audio{border-radius:var(--radius-md);width:100%}.cv__doc-card{border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-8);text-align:center;align-items:center;gap:var(--space-3);flex-direction:column;display:flex}.cv__doc-icon{background:var(--color-warning-light);border-radius:var(--radius-xl);color:#f59e0b;justify-content:center;align-items:center;width:64px;height:64px;display:flex}.cv__doc-name{font-weight:var(--font-weight-semibold);font-size:var(--font-size-md);color:var(--color-text-primary);margin:0}.cv__doc-size{font-size:var(--font-size-sm);color:var(--color-text-tertiary);margin:0}.cv__pdf-embed{border:1px solid var(--color-border);border-radius:var(--radius-lg);width:100%;height:75vh;overflow:hidden}.cv__pdf-embed iframe{border:none;width:100%;height:100%}.cv__notes{padding:var(--space-2) 0}.cv__section-info{text-align:center;padding:var(--space-12) var(--space-6);color:var(--color-text-tertiary)}.cv__section-info svg{opacity:.4;margin:0 auto 12px}.cv__section-info p{color:var(--color-text-tertiary);margin:0}.cv__empty{text-align:center;padding:var(--space-12) var(--space-6);color:var(--color-text-tertiary)}.cv__empty svg{opacity:.3;margin:0 auto 12px}.cv__empty p{color:var(--color-text-tertiary);margin:0}.editor-panel{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);flex-direction:column;display:flex;overflow:hidden}.editor-panel__header{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border-light);background:#f5f5f480;justify-content:space-between;align-items:center;display:flex}.editor-panel__header h3{font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);text-transform:uppercase;letter-spacing:.04em;color:var(--color-text-secondary);margin:0}.editor-panel__body{padding:var(--space-4);flex:1}.editor-panel__body--flush{padding:0}.editor-detail{min-height:300px}.editor-detail__toolbar{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border-light);justify-content:space-between;align-items:center;display:flex}.editor-detail__content{padding:var(--space-5)}.course-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-5);cursor:pointer;flex-direction:column;transition:all .2s;display:flex;position:relative;overflow:hidden}.course-card:before{content:"";background:linear-gradient(90deg, var(--color-primary), var(--color-info));opacity:0;height:3px;transition:opacity .2s;position:absolute;top:0;left:0;right:0}.course-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.course-card:hover:before{opacity:1}.course-card__title{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);margin:0 0 var(--space-2) 0;color:var(--color-text-primary)}.course-card__desc{font-size:var(--font-size-sm);color:var(--color-text-secondary);margin:0 0 var(--space-4) 0;-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1;display:-webkit-box;overflow:hidden}.course-card__footer{padding-top:var(--space-3);border-top:1px solid var(--color-border-light);justify-content:space-between;align-items:center;margin-top:auto;display:flex}.course-card__stat{font-size:var(--font-size-xs);color:var(--color-text-tertiary);align-items:center;gap:4px;display:flex}