:root{--surface-primary: #FDF7E3;--surface-primary-rgb: 253, 247, 227;--surface-secondary: #FDF5D9;--surface-tertiary: #FDF1C5;--surface-inset: #FCE99D;--surface-elevated: #FFFCF1;--border-primary: #FDF5D9;--border-interactive: #cbc9c3;--text-primary: #302A24;--text-secondary: #64573C;--text-tertiary: #4A4130;--accent-primary: #fad643;--accent-primary-rgb: 250, 214, 67;--accent-primary-darker: #E0BF3D;--accent-secondary: #8b5cf6;--success: #10b981;--success-darker: #059669;--error: #ef4444;--warning: #f59e0b;--state-success: var(--success);--state-success-soft: #DCFCE7;--state-warning: var(--warning);--state-warning-soft: #FEF3C7;--state-error: var(--error);--state-error-soft: #FEE2E2;--state-info: #0369A1;--state-info-soft: #DBEAFE;--cosmic-latte: var(--surface-primary);--cornsilk: var(--surface-secondary);--lemon-chiffon: var(--surface-tertiary);--vanilla: var(--surface-inset);--old-gold: var(--accent-primary-darker);--walnut-brown: var(--text-secondary);--drab-dark-brown: var(--text-tertiary);--jet: var(--text-primary);--font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-serif: "Merriweather", Georgia, serif;--font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;--font-ui: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, ui-sans-serif, system-ui, "Segoe UI", sans-serif;--font-prose-serif: "Newsreader", Georgia, "Times New Roman", serif;--font-ui-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;--space-1x: 4px;--space-2x: 8px;--space-3x: 12px;--space-4x: 16px;--space-5x: 20px;--space-6x: 24px;--space-8x: 32px;--space-10x: 40px;--space-12x: 48px;--space-16x: 64px;--header-height: 64px;--connectivity-banner-height: 36px;--layout-breakpoint-tablet: 1100px;--layout-breakpoint-mobile: 768px;--layout-transition-duration: .18s;--shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, .04);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--shadow-2xl: 0 24px 60px rgba(0, 0, 0, .3);--shadow-popover: 0 12px 32px rgba(0, 0, 0, .18);--shadow-modal: 0 24px 64px rgba(0, 0, 0, .25);--shadow-inset-highlight: inset 0 1px 0 rgba(255, 255, 255, .4);--overlay-scrim: rgba(0, 0, 0, .5);--overlay-scrim-strong: rgba(0, 0, 0, .6);--radius-xs: 2px;--radius-2xs: 3px;--radius-sm: 4px;--radius-tight: 5px;--radius-md: 6px;--radius-compact: 7px;--radius-lg: 8px;--radius-snug: 9px;--radius-soft: 10px;--radius-xl: 12px;--radius-comfy: 14px;--radius-2xl: 16px;--radius-roomy: 18px;--radius-airy: 20px;--radius-breezy: 22px;--radius-3xl: 24px;--radius-pill: 999px;--radius-circle: 50%;--font-size-micro: .6rem;--font-size-tiny: 10px;--font-size-xs: 11px;--font-size-caption: .72rem;--font-size-sm: 12px;--font-size-compact: .8rem;--font-size-base: 13px;--font-size-compact-lg: .85rem;--font-size-md: 14px;--font-size-body: .9rem;--font-size-mid: .9375rem;--font-size-body-lg: .95rem;--font-size-lg: 16px;--font-size-lg-tight: 1.0625rem;--font-size-xl-tight: 1.1rem;--font-size-xl: 18px;--font-size-2xl: 1.25rem;--font-size-3xl: 1.5rem;--text-on-accent: #fff;--border-info: var(--state-info);--border: var(--border-primary);--transition-curve: cubic-bezier(.4, 0, .2, 1);--transition-duration: .25s}[data-context=student]{--color-mastered: var(--state-success);--color-mastered-soft: var(--state-success-soft);--color-in-progress: var(--state-warning);--color-in-progress-soft: var(--state-warning-soft);--color-warning: var(--state-warning);--color-warning-soft: var(--state-warning-soft);--color-error: var(--state-error);--color-error-soft: var(--state-error-soft);--surface-student: var(--surface-primary);--surface-student-raised: var(--surface-secondary);--surface-student-inset: var(--surface-inset);--surface-student-card: var(--state-warning-soft);--surface-student-muted: var(--surface-tertiary);--text-student-primary: var(--text-primary);--text-student-secondary: var(--text-secondary);--text-student-muted: var(--text-tertiary);--border-student: var(--border-primary);--border-student-strong: var(--border-interactive);--accent-regular-chat: var(--accent-primary);--accent-assessment-chat: var(--accent-secondary);--accent-slate: var(--text-tertiary);--accent-sky: var(--state-info);--home-bg-peach: var(--state-warning-soft);--home-bg-orange-soft: var(--state-warning-soft);--home-text-amber: var(--state-warning);--home-chart-green: var(--state-success);--home-bar-neutral: var(--surface-tertiary);--home-donut-accent: var(--state-warning);--enroll-bg: var(--surface-primary);--enroll-accent: var(--accent-primary);--enroll-accent-strong: var(--accent-primary-darker);--enroll-text: var(--text-primary);--welcome-bg: var(--surface-primary);--welcome-accent-primary: var(--text-tertiary);--welcome-accent-secondary: var(--state-info);--space-0: 0;--space-1: var(--space-1x);--space-2: var(--space-2x);--space-3: var(--space-3x);--space-4: var(--space-4x);--space-5: var(--space-5x);--space-6: var(--space-6x);--space-8: var(--space-8x);--space-10: var(--space-10x);--space-12: var(--space-12x)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:var(--font-size-lg);scroll-behavior:smooth}body{background-color:var(--surface-primary);color:var(--text-secondary);font-family:var(--font-serif);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}body::-webkit-scrollbar{width:8px}body::-webkit-scrollbar-track{background:var(--surface-secondary)}body::-webkit-scrollbar-thumb{background-color:var(--border-primary);border-radius:var(--radius-sm)}body::-webkit-scrollbar-thumb:hover{background-color:var(--border-interactive)}@media(max-width:900px){body::-webkit-scrollbar{width:0px;height:0px;background:transparent;display:none}body::-webkit-scrollbar-track{background:transparent;display:none}body::-webkit-scrollbar-thumb{background:transparent;display:none}body{scrollbar-width:none;scrollbar-color:transparent transparent}body{-ms-overflow-style:none}html,body{overflow-x:hidden}.main-content::-webkit-scrollbar{display:none}.course-content-area::-webkit-scrollbar{display:none}*::-webkit-scrollbar{width:0px!important;height:0px!important;background:transparent!important}*{scrollbar-width:none!important;-ms-overflow-style:none!important}.course-content-area p{text-align:justify;hyphens:auto;-webkit-hyphens:auto;word-break:break-word}}h1,h2,h3,h4,h5,h6{font-family:var(--font-serif);color:var(--text-primary);font-weight:600;line-height:1.2;letter-spacing:-.025em}h1{font-size:2.5rem;font-weight:700;margin-bottom:var(--space-6x)}h2{font-size:1.875rem;margin-bottom:var(--space-4x)}h3{font-size:var(--font-size-2xl);font-weight:600;line-height:1.4;margin-bottom:var(--space-3x)}h4{font-size:var(--font-size-lg);font-weight:600;color:var(--text-secondary);margin-bottom:var(--space-2x);text-transform:uppercase;letter-spacing:.05em}h5{font-size:var(--font-size-body);font-weight:600;color:var(--text-secondary);margin-bottom:var(--space-2x);line-height:1.4}h6{font-size:var(--font-size-compact-lg);font-weight:500;color:var(--text-muted);margin-bottom:var(--space-1x);line-height:1.4}p{margin-bottom:var(--space-4x);max-width:65ch;line-height:1.7;color:var(--text-secondary)}.course-content-area p{max-width:85ch;word-wrap:break-word;overflow-wrap:break-word}ul,ol{margin:0 0 var(--space-3x) 0;padding-left:1.25rem;list-style-position:outside}li{margin:.25em 0}ul ul,ol ol{margin:.25em 0;padding-left:1.25rem}a{color:var(--text-primary);text-decoration:none;transition:color .2s ease}a:hover{color:var(--text-secondary)}code{font-family:var(--font-mono);background-color:var(--surface-inset);padding:2px 6px;border-radius:var(--radius-sm);font-size:.875em;color:var(--text-primary)}pre{background-color:var(--surface-inset);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:var(--space-4x);margin-bottom:var(--space-4x);overflow-x:auto;font-size:var(--font-size-md);width:100%;max-width:65ch;box-sizing:border-box}.course-content-area pre{max-width:85ch}.course-content-area{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.placeholder-text{color:var(--text-tertiary);font-style:italic}.loading-spinner{border:4px solid var(--surface-tertiary);border-top:4px solid var(--accent-primary);border-radius:var(--radius-circle);width:50px;height:50px;animation:spin 1s linear infinite;margin:var(--space-10x) auto}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.error-message{background:var(--state-error-soft);border:1px solid var(--state-error);border-radius:var(--radius-lg);padding:var(--space-4x);margin:var(--space-4x) 0;color:var(--state-error)}.error-message h3{margin:0 0 var(--space-2x) 0;color:var(--state-error)}.error-message button{background:var(--state-error);color:var(--surface-primary);border:none;padding:var(--space-2x) var(--space-4x);border-radius:var(--radius-lg);cursor:pointer;margin-top:var(--space-2x)}.error-message button:hover{filter:brightness(.9)}:root{--z-sidebar-tab: 400;--z-floating: 1000;--z-modal: 1000;--z-context-menu: 9999;--z-header-underlay: 10900;--z-header: 11000;--z-dropdown: 12000;--z-tooltip: 12000;--z-modal-raised: 12000;--z-toast: 12050;--z-critical-overlay: 30000;--floating-corner-gap: 13px}.card{background:var(--surface-primary);border:1px solid var(--border-primary);border-radius:var(--radius-xl);padding:var(--space-6x);box-shadow:var(--shadow-sm);transition:all .2s ease}.card:hover{box-shadow:var(--shadow-md);border-color:var(--border-interactive)}.course-sidebar .card{padding:10px 8px;background:color-mix(in srgb,var(--surface-primary) 85%,var(--vanilla))}.card ul,.card ol{margin:0 0 var(--space-3x) 0;padding-left:1.25rem;list-style-position:outside}.card li{margin:.25em 0}.card ul ul,.card ol ol{margin-top:.25em;margin-bottom:.25em;padding-left:1.25rem}.card p+ul,.card p+ol{margin-top:.5em}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2x);background:var(--surface-primary);border:1px solid var(--border-primary);border-radius:var(--radius-lg);padding:10px 20px;font-family:var(--font-sans);font-size:var(--font-size-md);font-weight:500;color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none;transition:all .15s ease;box-shadow:var(--shadow-sm)}.btn:hover:not(:disabled){background:var(--surface-secondary);border-color:var(--border-interactive);box-shadow:var(--shadow-md);transform:translateY(-1px)}.btn:active{transform:translateY(0)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:var(--accent-primary);border-color:var(--accent-primary);color:var(--text-primary);font-weight:600}.btn-primary:hover:not(:disabled){background:var(--accent-primary-darker);border-color:var(--accent-primary-darker)}.btn-danger{background:var(--error);border-color:var(--error);color:var(--surface-primary)}.btn-sm{padding:6px 10px;font-size:var(--font-size-compact);border-radius:var(--radius-md)}.btn-xs{padding:4px 8px;font-size:var(--font-size-sm);border-radius:var(--radius-md)}.btn-outline{background:var(--surface-secondary)}.sidebar-row{position:relative;display:grid;--sidebar-toggle-width: 28px;grid-template-columns:minmax(0,var(--sidebar-toggle-width)) 1fr;align-items:center;gap:6px;width:100%;overflow:visible;min-height:28px;--sidebar-indent-step: 16px;--sidebar-depth: 0}.sidebar-row-body{display:flex;align-items:center;width:100%;min-width:0;padding-left:calc(var(--sidebar-indent-step) * var(--sidebar-depth))}.sidebar-row .progress-item{display:block;width:100%}.sidebar-toggle{display:inline-flex;align-items:center;justify-content:center;width:100%;height:26px;border:none;background:transparent;color:var(--text-secondary);border-radius:var(--radius-md);cursor:pointer;transition:background .16s ease,color .16s ease}.sidebar-toggle:not([disabled]):hover,.sidebar-toggle:not([disabled]):focus-visible{background:#0000000d;color:var(--text-primary)}.sidebar-toggle:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}.sidebar-toggle[disabled]{cursor:default;color:var(--border-primary);opacity:.35}.sidebar-toggle--placeholder,.sidebar-row[data-collapsed=false] .sidebar-toggle{opacity:0;pointer-events:none}.sidebar-row[data-collapsed=false]:hover .sidebar-toggle,.sidebar-row[data-collapsed=false]:focus-within .sidebar-toggle{opacity:1;pointer-events:auto}.sidebar-row[data-collapsed=true] .sidebar-toggle{opacity:.85}.course-sidebar{font-family:var(--font-sans);--chevron-space: 24px}.course-sidebar .progress-item{font-weight:500;font-family:inherit}.sidebar-label{display:inline-flex;align-items:center;gap:8px}.sidebar-row .drag-handle{position:relative;width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;color:var(--text-secondary);opacity:.25;cursor:grab;transition:opacity .16s ease,color .16s ease}.sidebar-row .drag-handle:hover{opacity:.7;color:var(--text-primary)}.sidebar-row .drag-handle:active{cursor:grabbing}.course-nav-list .has-drag>.sidebar-row .progress-item,.course-nav-list .element-level.has-drag .progress-item{padding-left:0}.page-element-nav-animator{overflow:hidden;max-height:0;opacity:0;transform:translateY(-6px);transition:max-height .24s ease,opacity .18s ease,transform .24s ease}.page-element-nav-animator[data-state=open]{opacity:1;transform:translateY(0);overflow:visible}.page-element-nav-animator[data-state=closing]{opacity:0;transform:translateY(-6px)}.page-element-nav{margin:4px 0 0;padding-left:calc(var(--sidebar-indent-step, 16px) * (var(--sidebar-depth, 0) + 1));list-style:none;display:flex;flex-direction:column;gap:2px}.element-nav-button{display:flex;align-items:center;gap:10px;width:100%;padding:6px 10px;border-radius:var(--radius-soft);border:none;background:transparent;color:var(--text-secondary);font-size:12.5px;text-align:left;transition:background .18s ease,color .18s ease,box-shadow .18s ease,transform .22s ease,opacity .18s ease;cursor:pointer;--nav-shift-x: 0px;--nav-shift-y: 0px;transform:translate(var(--nav-shift-x, 0px)) translateY(var(--nav-shift-y, 0px))}.element-nav-button:hover,.element-nav-button:focus-visible{background:color-mix(in srgb,var(--accent-primary) 16%,transparent);color:var(--text-primary);outline:none;box-shadow:0 4px 10px color-mix(in srgb,var(--text-primary) 16%,transparent);--nav-shift-x: 2px}.element-nav-button.active{background:color-mix(in srgb,var(--accent-primary) 22%,transparent);color:var(--text-primary);font-weight:600;box-shadow:0 8px 16px color-mix(in srgb,var(--text-primary) 20%,transparent)}.element-nav-button.is-hidden{opacity:.3;color:var(--text-tertiary, #6b6b6b);font-style:italic;filter:saturate(.2)}.element-nav-button.is-hidden .element-nav-icon{background:color-mix(in srgb,var(--text-tertiary) 25%,transparent);color:var(--text-tertiary);box-shadow:none}.element-nav-button.draggable:hover{cursor:grab}.element-nav-button.draggable:active{cursor:grabbing}.page-element-nav-animator .element-nav-button{--nav-shift-y: 6px;opacity:0;transition-delay:calc(var(--nav-item-index, 0) * 18ms)}.page-element-nav-animator[data-state=open] .element-nav-button{--nav-shift-y: 0px;opacity:1}.page-element-nav-animator[data-state=closing] .element-nav-button{--nav-shift-y: -6px;opacity:0}.element-nav-icon{width:30px;height:30px;border-radius:var(--radius-soft);background:color-mix(in srgb,var(--accent-primary) 18%,transparent);color:currentColor;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;transition:transform .18s ease,box-shadow .18s ease;position:relative}.element-nav-icon-svg{width:16px;height:16px}.element-nav-button:hover .element-nav-icon,.element-nav-button:focus-visible .element-nav-icon{transform:translate(1px);box-shadow:0 4px 12px color-mix(in srgb,var(--text-primary) 18%,transparent)}.element-nav-button.active .element-nav-icon{box-shadow:0 4px 14px color-mix(in srgb,var(--text-primary) 22%,transparent)}.element-nav-icon .mastery-count-badge{position:absolute;top:-4px;right:-4px;display:inline-flex;align-items:center;justify-content:center;margin:0;width:16px!important;height:16px!important;font-size:.7rem;line-height:1;pointer-events:none;box-shadow:0 1px 2px #00000014;z-index:1}.element-nav-icon--video{background:var(--element-video-bg);color:var(--element-video-fg)}.element-nav-icon--audio{background:var(--element-audio-bg);color:var(--element-audio-fg)}.element-nav-icon--code{background:var(--element-code-bg);color:var(--element-code-fg)}.element-nav-icon--quiz{background:var(--element-quiz-bg);color:var(--element-quiz-fg)}.element-nav-icon--embed{background:var(--element-embed-bg);color:var(--element-embed-fg)}.element-nav-icon--image{background:var(--element-image-bg);color:var(--element-image-fg)}.element-nav-icon--doc{background:var(--element-doc-bg);color:var(--element-doc-fg)}.element-nav-label{flex:1 1 auto;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.element-nav-label--wrap{white-space:normal}.element-nav-title-editor{width:100%}.element-nav-title-text{display:inline-block;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.element-nav-title-text--wrap{white-space:normal}.progress-item.is-dragging{z-index:var(--z-floating);box-shadow:0 8px 25px #00000040!important;background:var(--surface-primary)!important;border:2px solid var(--accent-primary)!important}.progress-item.is-dragging *{pointer-events:none}body.smooth-dragging{cursor:grabbing!important;-webkit-user-select:none!important;user-select:none!important}body.smooth-dragging *{cursor:grabbing!important}.progress-item.section-title-button[data-section-id]:hover:after{content:"";position:absolute;inset:0;border:2px dashed transparent;border-radius:inherit;pointer-events:none;transition:border-color .2s ease;display:none}body.smooth-dragging .progress-item.section-title-button[data-section-id]:hover:after{border-color:var(--accent-primary);background:rgba(var(--accent-primary-rgb, 250, 214, 67),.1)}.progress-item.section-title-button[data-section-id]{transition:all .2s ease}.progress-item.section-title-button[data-section-id]:hover:not(.active){background:rgba(var(--accent-primary-rgb, 250, 214, 67),.08)}body.smooth-dragging .progress-item:hover{background:rgba(var(--accent-primary-rgb, 250, 214, 67),.12)!important;border-left:3px solid var(--accent-primary)!important;transform:translate(2px);transition:all .1s ease}body.smooth-dragging .progress-item.section-title-button[data-section-id]:hover{background:rgba(var(--accent-primary-rgb, 250, 214, 67),.18)!important;border-left:4px solid var(--accent-primary)!important;transform:translate(4px)}.course-nav-container.is-dragging .course-nav-list>li:not(.insert-between):hover{outline:2px dashed var(--accent-primary);outline-offset:2px}.course-nav-list li.drag-over-target{background:rgba(var(--accent-primary-rgb, 250, 214, 67),.12)}.course-nav-list .module-level,.course-nav-list .section-level,.course-nav-list .element-level{position:relative;display:block;min-width:0}.course-nav-list .module-level{border-left:3px solid color-mix(in srgb,var(--vanilla) 65%,var(--old-gold))}.course-nav-list .section-level{border-left:2px solid color-mix(in srgb,var(--vanilla) 45%,var(--old-gold))}.course-nav-list .element-level{border-left:2px dashed color-mix(in srgb,var(--border-primary) 70%,transparent)}.element-list{list-style:none;margin:0;padding:0}.course-nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:4px;justify-content:flex-start;min-width:0}.course-nav-list .course-nav-list{padding:0;gap:4px}.course-nav-list .sidebar-children{margin-top:4px;display:flex;flex-direction:column;gap:4px}.course-nav-list>li{width:100%;padding:0}.course-nav-list .module-level,.course-nav-list .section-level,.course-nav-list 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0}.tsp-label{font-size:var(--font-size-sm);color:var(--text-secondary);margin-top:var(--space-2x, 8px)}.tsp-select{appearance:none;width:100%;border:1px solid var(--border-primary);background:var(--surface-primary);color:var(--text-primary);border-radius:var(--radius-md);padding:var(--space-2x, 8px) var(--space-3x, 12px);font-size:var(--font-size-md);font-family:inherit}.tsp-select:focus-visible{outline:2px solid var(--accent-primary-darker);outline-offset:2px}.tsp-toggle-group,.tsp-chip-group{display:flex;flex-wrap:wrap;gap:var(--space-2x, 8px)}.tsp-toggle,.tsp-chip{appearance:none;border:1px solid var(--border-primary);background:var(--surface-primary);color:var(--text-secondary);border-radius:var(--radius-pill);padding:var(--space-1x, 4px) var(--space-3x, 12px);font-size:var(--font-size-sm);font-family:inherit;cursor:pointer;transition:background var(--transition-duration) var(--transition-curve),color var(--transition-duration) var(--transition-curve),border-color 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8px)}.publishing-modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:10000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.publishing-modal{background:var(--surface-primary, #fff);border-radius:var(--radius-xl);box-shadow:0 8px 32px #0003;width:90%;max-width:480px;overflow:hidden}.publishing-modal-header{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;border-bottom:1px solid var(--border-primary, #e0ded8)}.publishing-modal-header h3{margin:0;font-size:var(--font-size-xl);font-weight:600;color:var(--text-primary, #111)}.publishing-modal-close{background:none;border:none;padding:4px;cursor:pointer;color:var(--text-secondary, #525252);display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);transition:all .15s ease}.publishing-modal-close:hover{background:var(--surface-secondary, #f9f8f3);color:var(--text-primary, #111)}.publishing-modal-content{padding:24px}.publishing-progress{margin-bottom:24px}.publishing-progress-bar{width:100%;height:8px;background:var(--surface-secondary, #f9f8f3);border-radius:var(--radius-sm);overflow:hidden;margin-bottom:8px}.publishing-progress-fill{height:100%;background:linear-gradient(90deg,var(--old-gold, #E0BF3D),color-mix(in srgb,var(--old-gold, #E0BF3D) 80%,var(--text-primary)));border-radius:var(--radius-sm);transition:width .3s ease}.publishing-progress-text{display:flex;justify-content:space-between;align-items:center;font-size:var(--font-size-sm);color:var(--text-secondary, #525252);font-weight:600}.publishing-count{font-weight:400;opacity:.8}.publishing-status{display:flex;align-items:center;gap:12px;margin-bottom:16px}.publishing-spinner{flex-shrink:0;color:var(--old-gold, #E0BF3D)}.publishing-success{flex-shrink:0;color:var(--state-success)}.publishing-label{margin:0;font-size:var(--font-size-md);font-weight:500;color:var(--text-primary, #111)}.publishing-info{margin-top:16px;padding-top:16px;border-top:1px solid var(--border-primary, #e0ded8)}.publishing-times{display:flex;gap:16px;margin-bottom:8px}.publishing-time{margin:0;font-size:var(--font-size-sm);color:var(--text-secondary, #525252);font-weight:500}.publishing-stats{margin:0 0 8px;font-size:var(--font-size-sm);color:var(--text-primary, #111);font-weight:600}.publishing-note{margin:0;font-size:var(--font-size-sm);color:var(--text-secondary, #525252);line-height:1.5}.publishing-error{text-align:center;padding:24px 0}.publishing-error svg{color:var(--state-error);margin-bottom:16px}.publishing-error p{margin:0;font-size:var(--font-size-md);color:var(--text-primary, #111)}.publish-diff-modal__overlay{position:fixed;inset:0;background:var(--overlay-scrim-strong);display:flex;align-items:center;justify-content:center;z-index:var(--z-modal, 1000);backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}.publish-diff-modal{width:min(720px,92vw);max-height:min(720px,92vh);background:var(--surface-elevated);color:var(--text-primary);border-radius:var(--radius-xl);border:1px solid var(--border-interactive);box-shadow:var(--shadow-modal),0 0 0 1px color-mix(in srgb,var(--text-primary) 8%,transparent);display:flex;flex-direction:column;overflow:hidden}.publish-diff-modal__header{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border-interactive);background:linear-gradient(180deg,color-mix(in srgb,var(--accent-primary) 10%,var(--surface-elevated)),color-mix(in srgb,var(--accent-primary) 6%,var(--surface-elevated)))}.publish-diff-modal__header h2{margin:0;font-size:var(--font-size-lg);font-weight:600;color:var(--text-primary)}.publish-diff-modal__close{width:28px;height:28px;border-radius:var(--radius-md);border:0;background:transparent;font-size:22px;cursor:pointer;color:var(--text-secondary);transition:background .12s ease-out,color .12s ease-out}.publish-diff-modal__close:hover{background:color-mix(in srgb,var(--text-primary) 6%,transparent);color:var(--text-primary)}.publish-diff-modal__body{flex:1;overflow-y:auto;padding:14px 18px}.publish-diff-modal__loading,.publish-diff-modal__empty{text-align:center;padding:32px 0;color:var(--text-secondary)}.publish-diff-modal__error{background:var(--state-warning-soft);color:color-mix(in srgb,var(--state-warning) 80%,var(--text-primary));border:1px solid color-mix(in srgb,var(--state-warning) 35%,transparent);padding:12px;border-radius:var(--radius-lg)}.publish-diff-modal__tree{list-style:none;margin:0;padding:0}.publish-diff-modal__row{border-bottom:1px solid color-mix(in srgb,var(--text-primary) 8%,transparent)}.publish-diff-modal__row-header{display:flex;align-items:center;gap:8px;width:100%;padding:4px}.publish-diff-modal__row-toggle{display:flex;align-items:center;gap:8px;flex:1;min-width:0;padding:10px 4px;border:0;background:transparent;text-align:left;cursor:pointer;font-size:var(--font-size-md);border-radius:var(--radius-md);color:var(--text-primary);transition:background .12s ease-out}.publish-diff-modal__row-toggle:hover{background:color-mix(in srgb,var(--accent-primary) 8%,transparent)}.publish-diff-modal__jump{width:30px;height:30px;flex:0 0 30px;border:1px solid color-mix(in srgb,var(--accent-primary) 24%,var(--border-interactive));border-radius:var(--radius-md);background:var(--surface-elevated);color:var(--text-secondary);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:color .12s ease-out,background .12s ease-out,border-color .12s ease-out}.publish-diff-modal__jump:hover{color:var(--accent-primary);background:color-mix(in srgb,var(--accent-primary) 8%,var(--surface-elevated));border-color:color-mix(in srgb,var(--accent-primary) 45%,var(--border-interactive))}.publish-diff-modal__chevron{display:inline-flex;width:16px;color:var(--text-tertiary)}.publish-diff-modal__status-pill{display:inline-flex;align-items:center;padding:1px 8px;border-radius:var(--radius-pill);font-size:var(--font-size-xs);font-weight:600;border:1px solid currentColor}.publish-diff-modal__status-pill--added{color:color-mix(in srgb,var(--state-success) 60%,var(--text-primary));background:color-mix(in srgb,var(--state-success) 12%,transparent)}.publish-diff-modal__status-pill--changed{color:color-mix(in srgb,var(--state-warning) 60%,var(--text-primary));background:color-mix(in srgb,var(--state-warning) 14%,transparent)}.publish-diff-modal__status-pill--deleted{color:color-mix(in srgb,var(--state-error) 60%,var(--text-primary));background:color-mix(in srgb,var(--state-error) 12%,transparent)}.publish-diff-modal__status-pill--unchanged{color:var(--text-tertiary);background:color-mix(in srgb,var(--text-tertiary) 8%,transparent)}.publish-diff-modal__title{font-weight:500;flex-shrink:0;color:var(--text-primary)}.publish-diff-modal__summary{flex:1;color:var(--text-secondary);font-size:var(--font-size-sm);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.publish-diff-modal__row-detail{padding:12px 16px 14px;font-size:var(--font-size-base);color:var(--text-secondary);display:grid;gap:12px;background:var(--surface-primary);border-radius:var(--radius-md);margin:0 4px 8px;border:1px solid color-mix(in srgb,var(--text-primary) 6%,transparent)}.publish-diff-modal__detail-section{display:grid;gap:6px}.publish-diff-modal__detail-label{font-size:var(--font-size-sm);font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--text-tertiary)}.publish-diff-modal__detail-list{display:grid;gap:6px}.publish-diff-modal__detail-block{display:flex;align-items:flex-start;gap:8px;padding:6px 10px;border-radius:var(--radius-md);background:var(--surface-elevated);border-left:3px solid var(--border-interactive);font-size:var(--font-size-md);color:var(--text-primary);line-height:1.45;word-break:break-word}.publish-diff-modal__detail-block--added{border-left-color:color-mix(in srgb,var(--state-success) 60%,var(--border-interactive));background:color-mix(in srgb,var(--state-success) 5%,var(--surface-elevated))}.publish-diff-modal__detail-block--removed{border-left-color:color-mix(in srgb,var(--state-error) 55%,var(--border-interactive));background:color-mix(in srgb,var(--state-error) 5%,var(--surface-elevated))}.publish-diff-modal__detail-block--changed{border-left-color:color-mix(in srgb,var(--state-warning) 55%,var(--border-interactive));background:color-mix(in srgb,var(--state-warning) 5%,var(--surface-elevated))}.publish-diff-modal__detail-tag{flex-shrink:0;display:inline-flex;align-items:center;font-family:var(--font-mono, monospace);font-size:var(--font-size-xs);font-weight:600;letter-spacing:.02em;color:var(--text-tertiary);padding:2px 6px;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--text-primary) 5%,transparent);white-space:nowrap}.publish-diff-modal__detail-text{flex:1;min-width:0}.publish-diff-modal__detail-delta{flex:1;min-width:0;display:flex;align-items:center;gap:8px;flex-wrap:wrap}.publish-diff-modal__detail-delta--stack{flex-direction:column;align-items:stretch;gap:4px}.publish-diff-modal__detail-before,.publish-diff-modal__detail-after{flex:1;min-width:0;padding:4px 8px;border-radius:var(--radius-sm);font-size:var(--font-size-md)}.publish-diff-modal__detail-before{background:color-mix(in srgb,var(--state-error) 8%,transparent);color:color-mix(in srgb,var(--state-error) 65%,var(--text-primary));text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--state-error) 40%,transparent)}.publish-diff-modal__detail-after{background:color-mix(in srgb,var(--state-success) 8%,transparent);color:color-mix(in srgb,var(--state-success) 65%,var(--text-primary))}.publish-diff-modal__detail-arrow{color:var(--text-tertiary);font-size:var(--font-size-md);align-self:center}.publish-diff-modal__detail-formatting{font-size:var(--font-size-sm);font-weight:500;color:color-mix(in srgb,var(--state-warning) 70%,var(--text-primary));background:color-mix(in srgb,var(--state-warning) 10%,transparent);padding:4px 8px;border-radius:var(--radius-sm);display:inline-block;width:fit-content}.publish-diff-modal__footer{padding:12px 18px;display:flex;justify-content:flex-end;gap:10px;border-top:1px solid var(--border-interactive);background:var(--surface-secondary)}.publish-diff-modal__btn{padding:8px 14px;border-radius:var(--radius-lg);font-size:var(--font-size-md);cursor:pointer;border:1px solid transparent;font-weight:500;transition:background .12s ease-out,color .12s ease-out,border-color .12s ease-out}.publish-diff-modal__btn--cancel{background:transparent;border-color:var(--border-primary);color:var(--text-primary)}.publish-diff-modal__btn--cancel:hover{background:color-mix(in srgb,var(--text-primary) 4%,transparent);border-color:color-mix(in srgb,var(--text-primary) 18%,var(--border-primary))}.publish-diff-modal__btn--confirm{background:var(--accent-primary-darker);color:var(--text-on-accent);border-color:var(--accent-primary-darker)}.publish-diff-modal__btn--confirm:hover:not(:disabled){background:color-mix(in srgb,var(--accent-primary-darker) 88%,var(--text-primary));border-color:color-mix(in srgb,var(--accent-primary-darker) 88%,var(--text-primary))}.publish-diff-modal__btn--confirm:disabled{background:color-mix(in srgb,var(--text-tertiary) 30%,var(--surface-secondary));color:var(--text-tertiary);border-color:var(--border-primary);cursor:not-allowed}.publish-header-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:1px solid var(--border-primary, #e0ded8);border-radius:var(--radius-md);background:var(--old-gold, #E0BF3D);color:var(--text-primary, #111);font-size:var(--font-size-base);font-weight:600;cursor:pointer;transition:all .15s ease}.publish-header-btn:hover:not(:disabled){background:color-mix(in srgb,var(--old-gold, #E0BF3D) 85%,var(--text-primary));border-color:color-mix(in srgb,var(--old-gold, #E0BF3D) 70%,var(--text-primary))}.publish-header-btn:disabled{opacity:.5;cursor:not-allowed}.publish-header-btn svg{flex-shrink:0}.app-shell{min-height:100dvh;background:var(--surface-primary, #FDF7E3)}.app-shell .app-shell__main{padding-top:var(--header-height, 64px);min-height:calc(100dvh - var(--header-height, 64px));background:var(--surface-primary, #FDF7E3)}.app-shell[data-layout-transitioning=true] .course-sidebar,.app-shell[data-layout-transitioning=true] .main-content,.app-shell[data-layout-transitioning=true] .student-course-grid{transition:margin-left var(--layout-transition-duration, .18s) var(--transition-curve, cubic-bezier(.4, 0, .2, 1)),width var(--layout-transition-duration, .18s) var(--transition-curve, cubic-bezier(.4, 0, .2, 1)),transform var(--layout-transition-duration, .18s) var(--transition-curve, cubic-bezier(.4, 0, .2, 1))}body.has-course-sidebar[data-app-layout-phase=tablet-drawer] .main-content,body.has-course-sidebar[data-app-layout-phase=mobile-drawer] .main-content{margin-left:0;width:100%}body.has-course-sidebar[data-app-layout-phase=tablet-drawer] .course-bottom-controls.with-sidebar,body.has-course-sidebar[data-app-layout-phase=mobile-drawer] .course-bottom-controls.with-sidebar{padding-left:16px}body[data-app-layout-phase=tablet-drawer] .sidebar-resize-handle,body[data-app-layout-phase=mobile-drawer] .sidebar-resize-handle,body[data-app-layout-phase=tablet-drawer] .v2-sidebar-edge-resize,body[data-app-layout-phase=mobile-drawer] .v2-sidebar-edge-resize{display:none}@media(prefers-reduced-motion:reduce){.app-shell[data-layout-transitioning=true] .course-sidebar,.app-shell[data-layout-transitioning=true] .main-content,.app-shell[data-layout-transitioning=true] .student-course-grid{transition:none}}.auth-overlay{position:fixed;inset:0;background:color-mix(in srgb,var(--surface-secondary, #f7f0dc) 75%,rgba(0,0,0,.25));-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:var(--z-context-menu);animation:fadeIn .3s ease-out}.auth-container{width:100%;max-width:400px;padding:2rem}.auth-card{background:var(--surface-primary, #fffaf0);border:1px solid var(--border-primary, rgba(48, 42, 36, .16));border-radius:var(--radius-xl);box-shadow:var(--shadow-xl, 0 28px 80px -38px rgba(48, 42, 36, .62));color:var(--text-primary, #302a24);padding:2.5rem;animation:slideUp .4s ease-out}@keyframes slideUp{0%{transform:translateY(30px);opacity:0}to{transform:translateY(0);opacity:1}}.auth-header{text-align:center;margin-bottom:2rem}.auth-brand{display:flex;align-items:center;justify-content:center;gap:2px;font-size:2rem;line-height:1}.auth-brand-title{margin:0;line-height:1;font-weight:700;color:var(--text-primary, #302a24)}.auth-logo{height:1.5em;width:auto;display:block;transform:translateY(-3px)}.auth-header h1,.auth-header .auth-brand-title{font-size:2rem;font-weight:700;color:var(--text-primary, #302a24);margin:0 0 .5rem}.auth-header p{color:var(--text-secondary, #64573c);margin:0;font-size:var(--font-size-lg)}.auth-form{display:flex;flex-direction:column;gap:1.5rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group label{font-weight:600;color:var(--text-primary, #302a24);font-size:var(--font-size-md)}.form-group input{padding:.75rem;border:1px solid var(--border-primary, rgba(48, 42, 36, .18));border-radius:var(--radius-lg);font-size:var(--font-size-lg);transition:border-color .2s ease,box-shadow .2s ease;background:var(--surface-secondary, #fffdf6);color:var(--text-primary, #302a24)}.form-group input:focus{outline:none;border-color:var(--accent-primary, #bf9b3b);box-shadow:0 0 0 3px rgba(var(--accent-primary-rgb, 191, 155, 59),.15);background:var(--surface-primary, #fffaf0)}.error-message{background:var(--state-error-soft);border:1px solid var(--state-error-soft);color:var(--state-error);padding:.75rem;border-radius:var(--radius-lg);font-size:var(--font-size-md);text-align:center}.error-message.success{background:var(--state-success-soft);border-color:var(--state-success);color:var(--state-success)}.auth-button{background:var(--text-primary, #302a24);color:#fff;border:none;padding:.875rem;border-radius:var(--radius-lg);font-size:var(--font-size-lg);font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.auth-button:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-lg, 0 18px 36px -24px rgba(48, 42, 36, .66))}.auth-button:disabled{opacity:.6;cursor:not-allowed}.forgot-password-link{margin-top:1rem;background:none;border:none;color:var(--text-secondary, #64573c);text-decoration:underline;cursor:pointer}.auth-footer{margin-top:2rem;text-align:center}.auth-footer p{color:var(--text-secondary, #64573c);margin:0;font-size:var(--font-size-md)}.toggle-button{background:var(--accent-primary, #fad643);border:1px solid var(--accent-primary, #bf9b3b);color:var(--text-primary, #302a24);font-weight:700;cursor:pointer;margin-left:.5rem;text-decoration:none;font-size:var(--font-size-md);border-radius:var(--radius-md);padding:2px 8px}.toggle-button:hover{background:transparent;color:var(--text-primary, #302a24)}.auth-overlay .auth-card{background:var(--state-warning-soft);border-color:color-mix(in srgb,var(--text-primary) 16%,transparent);box-shadow:0 28px 80px -38px color-mix(in srgb,var(--text-primary) 62%,transparent);color:var(--text-primary)}.auth-overlay .auth-brand-title,.auth-overlay .auth-header h1,.auth-overlay .auth-header .auth-brand-title,.auth-overlay .form-group label{color:var(--text-primary)}.auth-overlay .auth-header p,.auth-overlay .auth-footer p,.auth-overlay .forgot-password-link{color:var(--text-secondary)}.auth-overlay .form-group input{background:var(--state-warning-soft);border-color:color-mix(in srgb,var(--text-primary) 20%,transparent);color:var(--text-primary)}.auth-overlay .form-group input::placeholder{color:color-mix(in srgb,var(--text-primary) 62%,transparent)}.auth-overlay .form-group input:focus{background:var(--surface-primary);border-color:var(--accent-primary);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent-primary) 16%,transparent)}.auth-overlay .auth-button{background:var(--text-primary);color:var(--surface-primary)}.auth-overlay .toggle-button{background:var(--accent-primary);border-color:var(--accent-primary);color:var(--text-primary)}@media(max-width:480px){.auth-container{padding:1rem}.auth-card{padding:1.5rem}.auth-header h1{font-size:var(--font-size-3xl)}}.auth-invite-hint{margin:.5rem 0;padding:.5rem .75rem;border-radius:var(--radius-md);background:color-mix(in srgb,var(--accent, #fad643) 18%,transparent);border:1px solid color-mix(in srgb,var(--accent, #fad643) 35%,transparent);color:var(--text-primary, #302a24);font-size:var(--font-size-compact-lg)}.modal-overlay{position:fixed;inset:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);animation:fadeIn .2s ease}.courses-modal-overlay{z-index:var(--z-modal-raised)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:var(--surface-primary, #fdfbf7);color:var(--text-primary);border:1px solid color-mix(in srgb,var(--border-primary, #d7d1bf) 85%,transparent);border-radius:var(--radius-comfy);box-shadow:var(--shadow-xl);max-width:1080px;width:90%;max-height:86vh;display:flex;flex-direction:column;animation:slideUp .3s ease;font-family:var(--font-sans, var(--font-serif, inherit));position:relative}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;justify-content:flex-end;align-items:center;padding:0;border-bottom:none}.modal-close{background:color-mix(in srgb,var(--surface-primary, #fdfbf7) 85%,transparent);border:1px solid color-mix(in srgb,var(--border-primary, #d7d1bf) 85%,transparent);font-size:var(--font-size-3xl);color:var(--text-secondary);cursor:pointer;padding:0;width:30px;height:30px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-pill);transition:all .2s;z-index:2}.modal-close:hover{background:var(--surface-secondary, #f6f0dc);color:var(--text-primary);border-color:color-mix(in srgb,var(--accent-primary, #facc15) 55%,var(--border-primary, #d7d1bf))}.modal-body{padding:16px;overflow-y:auto;flex:1}.form-group{margin-bottom:16px}.form-group label{display:block;margin-bottom:8px;font-weight:600;color:var(--text-primary);font-size:var(--font-size-md)}.form-group input{width:100%;padding:10px 14px;border:1px solid var(--border-primary);border-radius:var(--radius-lg);font-size:var(--font-size-md);font-family:inherit;transition:border-color .2s;background:var(--surface-primary);color:var(--text-primary)}.form-group input:focus{outline:none;border-color:var(--accent-primary);box-shadow:0 0 0 3px rgba(var(--accent-primary-rgb),.1)}.message{padding:12px 16px;border-radius:var(--radius-lg);margin-bottom:16px;font-size:var(--font-size-md);animation:slideIn .3s ease}.message.success{background:var(--state-success);color:var(--state-success);border:1px solid var(--state-success)}.message.error{background:var(--state-error-soft);color:var(--state-error);border:1px solid var(--state-error)}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.form-actions{display:flex;gap:12px;justify-content:flex-end}.btn{padding:10px 20px;border-radius:var(--radius-lg);font-size:var(--font-size-md);font-weight:600;cursor:pointer;transition:all .2s;border:none;font-family:inherit}.btn-sm{padding:6px 10px;font-size:var(--font-size-sm)}.btn-primary{background:var(--accent-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--accent-primary-darker);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--surface-secondary);color:var(--text-primary);border:1px solid var(--border-primary)}.btn-secondary:hover:not(:disabled){background:var(--surface-tertiary);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn:disabled{opacity:.5;cursor:not-allowed}.cm-modal{max-width:min(1200px,92vw);width:100%;max-height:min(840px,88vh)}.cm-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px 12px;border-bottom:1px solid color-mix(in srgb,var(--border-primary, #d7d1bf) 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var(--text-secondary));pointer-events:none}.cm-search-input{width:100%;padding:7px 10px 7px 30px;border:1px solid color-mix(in srgb,var(--border-primary, #d7d1bf) 80%,transparent);border-radius:var(--radius-lg);font-size:var(--font-size-base);font-family:inherit;background:var(--surface-primary, #fdfbf7);color:var(--text-primary)}.cm-search-input:focus{outline:none;border-color:var(--accent-primary, #facc15);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent-primary, #facc15) 20%,transparent)}.cm-filter-pills{display:inline-flex;align-items:center;gap:4px;flex-wrap:wrap}.cm-pill{padding:5px 11px;border-radius:var(--radius-pill);border:1px solid color-mix(in srgb,var(--border-primary, #d7d1bf) 70%,transparent);background:var(--surface-primary, #fdfbf7);color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:600;cursor:pointer;transition:background .15s,border-color .15s,color .15s;font-family:inherit}.cm-pill:hover{background:color-mix(in srgb,var(--surface-secondary, 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