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.75rem;--font-size-small: .875rem;--font-size-normal: 1rem;--font-size-medium: 1.125rem;--font-size-large: 1.25rem;--font-size-xlarge: 1.5rem;--font-size-xxlarge: 2rem;--font-size-xxxlarge: 2.5rem;--spacing-xxs: .125rem;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-xxl: 3rem;--spacing-xxxl: 4rem;--border-radius-sm: .25rem;--border-radius-md: .5rem;--border-radius-lg: .75rem;--border-radius-xl: 1rem;--border-radius-round: 50%;--shadow-sm: 0 .125rem .25rem rgba(0, 0, 0, .05);--shadow-md: 0 .25rem .5rem rgba(0, 0, 0, .1);--shadow-lg: 0 .5rem 1rem rgba(0, 0, 0, .15);--shadow-xl: 0 1rem 2rem rgba(0, 0, 0, .2);--transition-fast: .2s;--transition-normal: .3s;--transition-slow: .5s;--header-height: 3.75rem;--footer-height: 5rem;--sidebar-width: 15rem;--container-max-width: 75rem;--carousel-height-mobile: 20rem;--carousel-height-tablet: 28.125rem;--carousel-height-desktop: 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#00000026;width:90%;max-width:500px;max-height:90vh;overflow:hidden;display:flex;flex-direction:column}.dialog-header[data-v-fbacc247]{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border-color, #e5e7eb)}.dialog-title[data-v-fbacc247]{font-size:1.25rem;font-weight:600;color:var(--text-color, #1f2937);margin:0}.close-btn[data-v-fbacc247]{display:flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:none;border-radius:.25rem;background-color:transparent;color:var(--text-color-secondary, #6b7280);cursor:pointer;transition:all .2s}.close-btn[data-v-fbacc247]:hover{background-color:var(--background-color-secondary, #f3f4f6)}.dialog-content[data-v-fbacc247]{flex:1;padding:1.5rem;overflow-y:auto}.file-preview[data-v-fbacc247]{display:flex;align-items:center;gap:1rem;padding:1rem;background-color:var(--background-color-secondary, 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transparent}.btn[data-v-fbacc247]:disabled{opacity:.5;cursor:not-allowed}.btn-primary[data-v-fbacc247]{background-color:var(--primary-color, #6366f1);color:#fff}.btn-primary[data-v-fbacc247]:hover:not(:disabled){background-color:var(--primary-color-dark, #4f46e5)}.btn-secondary[data-v-fbacc247]{background-color:var(--background-color-secondary, #f3f4f6);color:var(--text-color, #374151);border-color:var(--border-color, #d1d5db)}.btn-secondary[data-v-fbacc247]:hover:not(:disabled){background-color:var(--background-color-tertiary, #e5e7eb)}.close-icon[data-v-fbacc247],.pdf-icon[data-v-fbacc247],.word-icon[data-v-fbacc247],.ppt-icon[data-v-fbacc247],.excel-icon[data-v-fbacc247],.image-icon[data-v-fbacc247],.video-icon[data-v-fbacc247],.audio-icon[data-v-fbacc247],.file-icon[data-v-fbacc247]{width:1rem;height:1rem;background-size:contain;background-position:center;background-repeat:no-repeat}.file-icon-large .close-icon[data-v-fbacc247],.file-icon-large 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100-2H7z' clip-rule='evenodd' /%3E%3C/svg%3E")}.word-icon[data-v-fbacc247]{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%232563eb'%3E%3Cpath fill-rule='evenodd' d='M4 4a2 2 0 012-2h4.586A2 2 0 0112 2.586L15.414 6A2 2 0 0116 7.414V16a2 2 0 01-2 2H6a2 2 0 01-2-2V4zm2 6a1 1 0 011-1h6a1 1 0 110 2H7a1 1 0 01-1-1zm1 3a1 1 0 100 2h6a1 1 0 100-2H7z' clip-rule='evenodd' /%3E%3C/svg%3E")}.ppt-icon[data-v-fbacc247]{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%23ea580c'%3E%3Cpath fill-rule='evenodd' d='M4 4a2 2 0 012-2h4.586A2 2 0 0112 2.586L15.414 6A2 2 0 0116 7.414V16a2 2 0 01-2 2H6a2 2 0 01-2-2V4zm2 6a1 1 0 011-1h6a1 1 0 110 2H7a1 1 0 01-1-1zm1 3a1 1 0 100 2h6a1 1 0 100-2H7z' clip-rule='evenodd' /%3E%3C/svg%3E")}.excel-icon[data-v-fbacc247]{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2316a34a'%3E%3Cpath 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768px){.edit-dialog[data-v-fbacc247]{width:95%;margin:1rem}.dialog-header[data-v-fbacc247],.dialog-content[data-v-fbacc247],.dialog-footer[data-v-fbacc247]{padding:1rem}.file-preview[data-v-fbacc247]{flex-direction:column;text-align:center}.dialog-footer[data-v-fbacc247]{flex-direction:column}.btn[data-v-fbacc247]{width:100%;justify-content:center}}.materials-manager[data-v-89000cf8]{background-color:var(--background-color, #ffffff);border-radius:.5rem;box-shadow:0 1px 3px #0000001a;overflow:hidden}.section-header[data-v-89000cf8]{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border-color, #e5e7eb);background-color:var(--background-color, #ffffff)}.section-title[data-v-89000cf8]{font-size:1.25rem;font-weight:600;color:var(--text-color, #1f2937);margin:0}.section-actions[data-v-89000cf8]{display:flex;gap:.75rem}.btn[data-v-89000cf8]{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:.375rem;font-size:.875rem;font-weight:500;cursor:pointer;transition:all .2s;border:1px solid transparent}.btn-primary[data-v-89000cf8]{background-color:var(--primary-color, #6366f1);color:#fff}.btn-primary[data-v-89000cf8]:hover{background-color:var(--primary-color-dark, #4f46e5)}.btn-secondary[data-v-89000cf8]{background-color:var(--background-color-secondary, #f3f4f6);color:var(--text-color, #374151);border-color:var(--border-color, #d1d5db)}.btn-secondary[data-v-89000cf8]:hover{background-color:var(--background-color-tertiary, #e5e7eb)}.loading-state[data-v-89000cf8]{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;color:var(--text-color-secondary, #6b7280)}.loading-spinner[data-v-89000cf8]{width:2rem;height:2rem;border:2px solid var(--border-color, #e5e7eb);border-top:2px solid var(--primary-color, #6366f1);border-radius:50%;animation:spin-89000cf8 1s linear infinite;margin-bottom:1rem}@keyframes 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#f9fafb;--background-color-tertiary: #f3f4f6;--background-color-dark: #1f2937;--background-color-overlay: rgba(0, 0, 0, .5);--border-color: #e5e7eb;--border-color-light: #f3f4f6;--border-color-dark: #d1d5db;--border-color-focus: #3b82f6;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px 0 rgba(0, 0, 0, .06);--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 25px 50px -12px rgba(0, 0, 0, .25);--border-radius-sm: 4px;--border-radius: 6px;--border-radius-md: 8px;--border-radius-lg: 12px;--border-radius-xl: 16px;--border-radius-2xl: 20px;--border-radius-full: 9999px;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: .75rem;--spacing-lg: 1rem;--spacing-xl: 1.25rem;--spacing-2xl: 1.5rem;--spacing-3xl: 2rem;--spacing-4xl: 2.5rem;--spacing-5xl: 3rem;--spacing-6xl: 4rem;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--font-size-5xl: 3rem;--font-weight-light: 300;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--font-weight-extrabold: 800;--line-height-tight: 1.25;--line-height-snug: 1.375;--line-height-normal: 1.5;--line-height-relaxed: 1.625;--line-height-loose: 2;--font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-family-serif: Georgia, Cambria, "Times New Roman", Times, serif;--font-family-mono: Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--transition-fast: .15s ease-out;--transition-base: .2s ease-out;--transition-slow: .3s ease-out;--transition-slower: .5s ease-out;--ease-in: cubic-bezier(.4, 0, 1, 1);--ease-out: cubic-bezier(0, 0, .2, 1);--ease-in-out: cubic-bezier(.4, 0, .2, 1);--z-index-dropdown: 1000;--z-index-sticky: 1020;--z-index-fixed: 1030;--z-index-modal-backdrop: 1040;--z-index-modal: 1050;--z-index-popover: 1060;--z-index-tooltip: 1070;--breakpoint-sm: 640px;--breakpoint-md: 768px;--breakpoint-lg: 1024px;--breakpoint-xl: 1280px;--breakpoint-2xl: 1536px;--container-sm: 640px;--container-md: 768px;--container-lg: 1024px;--container-xl: 1280px;--container-2xl: 1536px;--grid-columns: 12;--grid-gap: 1rem;--grid-gap-sm: .5rem;--grid-gap-lg: 1.5rem;--grid-gap-xl: 2rem;--input-height: 2.75rem;--input-height-sm: 2.25rem;--input-height-lg: 3.25rem;--input-padding-x: .75rem;--input-padding-y: .5rem;--button-height: 2.75rem;--button-height-sm: 2.25rem;--button-height-lg: 3.25rem;--button-padding-x: 1.5rem;--button-padding-y: .75rem;--button-padding-x-sm: 1rem;--button-padding-y-sm: .5rem;--button-padding-x-lg: 2rem;--button-padding-y-lg: 1rem;--card-padding: 1.5rem;--card-padding-sm: 1rem;--card-padding-lg: 2rem;--card-border-radius: var(--border-radius-lg);--card-shadow: var(--shadow-md);--modal-backdrop: rgba(0, 0, 0, .5);--modal-border-radius: var(--border-radius-lg);--modal-shadow: var(--shadow-2xl);--modal-padding: 1.5rem;--nav-height: 4rem;--nav-padding-x: 1.5rem;--nav-padding-y: 1rem;--sidebar-width: 16rem;--sidebar-width-collapsed: 4rem;--content-padding: 2rem;--content-padding-sm: 1rem;--content-padding-lg: 3rem;--content-max-width: 1200px}@media (prefers-color-scheme: dark){:root{--text-color: #f9fafb;--text-color-secondary: #d1d5db;--text-color-muted: #9ca3af;--text-color-light: #6b7280;--text-color-inverse: #1f2937;--background-color: #1f2937;--background-color-secondary: #374151;--background-color-tertiary: #4b5563;--background-color-dark: #111827;--border-color: #4b5563;--border-color-light: #374151;--border-color-dark: #6b7280;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow: 0 1px 3px 0 rgba(0, 0, 0, .4), 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4), 0 2px 4px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4), 0 4px 6px -2px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .4), 0 10px 10px -5px rgba(0, 0, 0, .2);--shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, .6)}}@media (prefers-contrast: high){:root{--border-color: #000000;--border-color-light: #333333;--border-color-dark: #000000;--text-color: #000000;--text-color-secondary: #333333}}@media (prefers-reduced-motion: reduce){:root{--transition-fast: 0s;--transition-base: 0s;--transition-slow: 0s;--transition-slower: 0s}}*{box-sizing:border-box}.custom-scrollbar{scrollbar-width:thin;scrollbar-color:var(--gray-400) transparent}.custom-scrollbar::-webkit-scrollbar{width:6px;height:6px}.custom-scrollbar::-webkit-scrollbar-track{background:transparent}.custom-scrollbar::-webkit-scrollbar-thumb{background:var(--gray-400);border-radius:var(--border-radius-full)}.custom-scrollbar::-webkit-scrollbar-thumb:hover{background:var(--gray-500)}.flex{display:flex}.flex-col{flex-direction:column}.flex-row{flex-direction:row}.items-center{align-items:center}.items-start{align-items:flex-start}.items-end{align-items:flex-end}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.justify-start{justify-content:flex-start}.justify-end{justify-content:flex-end}.gap-1{gap:var(--spacing-xs)}.gap-2{gap:var(--spacing-sm)}.gap-3{gap:var(--spacing-md)}.gap-4{gap:var(--spacing-lg)}.gap-5{gap:var(--spacing-xl)}.gap-6{gap:var(--spacing-2xl)}.text-xs{font-size:var(--font-size-xs)}.text-sm{font-size:var(--font-size-sm)}.text-base{font-size:var(--font-size-base)}.text-lg{font-size:var(--font-size-lg)}.text-xl{font-size:var(--font-size-xl)}.text-2xl{font-size:var(--font-size-2xl)}.font-light{font-weight:var(--font-weight-light)}.font-normal{font-weight:var(--font-weight-normal)}.font-medium{font-weight:var(--font-weight-medium)}.font-semibold{font-weight:var(--font-weight-semibold)}.font-bold{font-weight:var(--font-weight-bold)}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.text-primary{color:var(--primary-color)}.text-secondary{color:var(--text-color-secondary)}.text-muted{color:var(--text-color-muted)}.text-danger{color:var(--danger-color)}.text-success{color:var(--success-color)}.text-warning{color:var(--warning-color)}.p-0{padding:0}.p-1{padding:var(--spacing-xs)}.p-2{padding:var(--spacing-sm)}.p-3{padding:var(--spacing-md)}.p-4{padding:var(--spacing-lg)}.p-5{padding:var(--spacing-xl)}.p-6{padding:var(--spacing-2xl)}.m-0{margin:0}.m-1{margin:var(--spacing-xs)}.m-2{margin:var(--spacing-sm)}.m-3{margin:var(--spacing-md)}.m-4{margin:var(--spacing-lg)}.m-5{margin:var(--spacing-xl)}.m-6{margin:var(--spacing-2xl)}.mt-0{margin-top:0}.mt-1{margin-top:var(--spacing-xs)}.mt-2{margin-top:var(--spacing-sm)}.mt-3{margin-top:var(--spacing-md)}.mt-4{margin-top:var(--spacing-lg)}.mt-5{margin-top:var(--spacing-xl)}.mt-6{margin-top:var(--spacing-2xl)}.mb-0{margin-bottom:0}.mb-1{margin-bottom:var(--spacing-xs)}.mb-2{margin-bottom:var(--spacing-sm)}.mb-3{margin-bottom:var(--spacing-md)}.mb-4{margin-bottom:var(--spacing-lg)}.mb-5{margin-bottom:var(--spacing-xl)}.mb-6{margin-bottom:var(--spacing-2xl)}.rounded-none{border-radius:0}.rounded-sm{border-radius:var(--border-radius-sm)}.rounded{border-radius:var(--border-radius)}.rounded-md{border-radius:var(--border-radius-md)}.rounded-lg{border-radius:var(--border-radius-lg)}.rounded-xl{border-radius:var(--border-radius-xl)}.rounded-full{border-radius:var(--border-radius-full)}.shadow-none{box-shadow:none}.shadow-sm{box-shadow:var(--shadow-sm)}.shadow{box-shadow:var(--shadow)}.shadow-md{box-shadow:var(--shadow-md)}.shadow-lg{box-shadow:var(--shadow-lg)}.shadow-xl{box-shadow:var(--shadow-xl)}.border{border:1px solid var(--border-color)}.border-t{border-top:1px solid var(--border-color)}.border-b{border-bottom:1px solid var(--border-color)}.border-l{border-left:1px solid var(--border-color)}.border-r{border-right:1px solid var(--border-color)}.border-light{border-color:var(--border-color-light)}.border-dark{border-color:var(--border-color-dark)}.border-primary{border-color:var(--primary-color)}.bg-white{background-color:var(--background-color)}.bg-gray-50{background-color:var(--gray-50)}.bg-gray-100{background-color:var(--gray-100)}.bg-gray-200{background-color:var(--gray-200)}.bg-primary{background-color:var(--primary-color)}.bg-secondary{background-color:var(--secondary-color)}.bg-success{background-color:var(--success-color)}.bg-warning{background-color:var(--warning-color)}.bg-danger{background-color:var(--danger-color)}.hidden{display:none}.block{display:block}.inline{display:inline}.inline-block{display:inline-block}.relative{position:relative}.absolute{position:absolute}.fixed{position:fixed}.sticky{position:sticky}.overflow-hidden{overflow:hidden}.overflow-auto{overflow:auto}.overflow-scroll{overflow:scroll}.overflow-x-hidden{overflow-x:hidden}.overflow-y-hidden{overflow-y:hidden}.overflow-x-auto{overflow-x:auto}.overflow-y-auto{overflow-y:auto}.w-full{width:100%}.w-auto{width:auto}.h-full{height:100%}.h-auto{height:auto}.h-screen{height:100vh}.transition-none{transition:none}.transition-all{transition:all var(--transition-base)}.transition-colors{transition:color var(--transition-base),background-color var(--transition-base),border-color var(--transition-base)}.transition-opacity{transition:opacity var(--transition-base)}.transition-transform{transition:transform var(--transition-base)}.transform{transform:translateZ(0)}.scale-95{transform:scale(.95)}.scale-100{transform:scale(1)}.scale-105{transform:scale(1.05)}.scale-110{transform:scale(1.1)}.translate-y-0{transform:translateY(0)}.translate-y-1{transform:translateY(.25rem)}.translate-y-2{transform:translateY(.5rem)}.-translate-y-1{transform:translateY(-.25rem)}.-translate-y-2{transform:translateY(-.5rem)}.opacity-0{opacity:0}.opacity-25{opacity:.25}.opacity-50{opacity:.5}.opacity-75{opacity:.75}.opacity-100{opacity:1}.pointer-events-none{pointer-events:none}.pointer-events-auto{pointer-events:auto}.select-none{-webkit-user-select:none;user-select:none}.select-text{-webkit-user-select:text;user-select:text}.select-all{-webkit-user-select:all;user-select:all}.select-auto{-webkit-user-select:auto;user-select:auto}.cursor-auto{cursor:auto}.cursor-default{cursor:default}.cursor-pointer{cursor:pointer}.cursor-wait{cursor:wait}.cursor-text{cursor:text}.cursor-move{cursor:move}.cursor-not-allowed{cursor:not-allowed}@media (min-width: 640px){.sm\:block{display:block}.sm\:hidden{display:none}.sm\:flex{display:flex}.sm\:grid{display:grid}}@media (min-width: 768px){.md\:block{display:block}.md\:hidden{display:none}.md\:flex{display:flex}.md\:grid{display:grid}}@media (min-width: 1024px){.lg\:block{display:block}.lg\:hidden{display:none}.lg\:flex{display:flex}.lg\:grid{display:grid}}@media (min-width: 1280px){.xl\:block{display:block}.xl\:hidden{display:none}.xl\:flex{display:flex}.xl\:grid{display:grid}}@media print{.print\:hidden{display:none}.print\:block{display:block}}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.focus\:outline-none:focus{outline:2px solid transparent;outline-offset:2px}.focus\:ring:focus{box-shadow:0 0 0 3px #4299e11a}.focus\:ring-primary:focus{box-shadow:0 0 0 3px #4299e11a}.hover\:bg-gray-50:hover{background-color:var(--gray-50)}.hover\:bg-gray-100:hover{background-color:var(--gray-100)}.hover\:text-primary:hover{color:var(--primary-color)}.hover\:shadow-md:hover{box-shadow:var(--shadow-md)}.hover\:scale-105:hover{transform:scale(1.05)}.hover\:-translate-y-1:hover{transform:translateY(-.25rem)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--button-padding-y) var(--button-padding-x);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight);border-radius:var(--border-radius-md);border:1px solid transparent;cursor:pointer;transition:all var(--transition-base);text-decoration:none;white-space:nowrap;-webkit-user-select:none;user-select:none;min-height:var(--button-height);font-family:var(--font-family-sans)}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none!important}.btn-sm{padding:var(--button-padding-y-sm) var(--button-padding-x-sm);font-size:var(--font-size-xs);min-height:var(--button-height-sm)}.btn-lg{padding:var(--button-padding-y-lg) var(--button-padding-x-lg);font-size:var(--font-size-base);min-height:var(--button-height-lg)}.btn-primary{background:linear-gradient(135deg,var(--primary-color) 0%,var(--primary-color-dark) 100%);color:var(--text-color-inverse);box-shadow:0 2px 4px #4299e14d}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px #4299e166}.btn-secondary{background-color:var(--gray-100);color:var(--text-color);border-color:var(--border-color)}.btn-secondary:hover:not(:disabled){background-color:var(--gray-200);border-color:var(--border-color-dark);transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--primary-color);border-color:var(--primary-color)}.btn-outline:hover:not(:disabled){background-color:var(--primary-color-lightest);transform:translateY(-1px)}.btn-success{background:linear-gradient(135deg,var(--success-color) 0%,var(--success-color-dark) 100%);color:var(--text-color-inverse);box-shadow:0 2px 4px #10b9814d}.btn-success:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px #10b98166}.btn-warning{background:linear-gradient(135deg,var(--warning-color) 0%,var(--warning-color-dark) 100%);color:var(--text-color-inverse);box-shadow:0 2px 4px #f59e0b4d}.btn-warning:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px #f59e0b66}.btn-danger{background:linear-gradient(135deg,var(--danger-color) 0%,var(--danger-color-dark) 100%);color:var(--text-color-inverse);box-shadow:0 2px 4px #ef44444d}.btn-danger:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 8px #ef444466}.btn-icon{display:inline-block;width:16px;height:16px;margin-right:var(--spacing-sm);background-size:contain;background-position:center;background-repeat:no-repeat;flex-shrink:0}.btn-sm .btn-icon{width:14px;height:14px}.btn-lg .btn-icon{width:18px;height:18px}.card{background-color:var(--background-color);border-radius:var(--card-border-radius);box-shadow:var(--card-shadow);border:1px solid var(--border-color-light);overflow:hidden;transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.card-header{padding:var(--card-padding);border-bottom:1px solid var(--border-color-light);background-color:var(--background-color-secondary)}.card-body{padding:var(--card-padding)}.card-footer{padding:var(--card-padding);border-top:1px solid var(--border-color-light);background-color:var(--background-color-secondary)}.card-title{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--text-color);margin:0 0 var(--spacing-sm) 0}.card-subtitle{font-size:var(--font-size-sm);color:var(--text-color-secondary);margin:0 0 var(--spacing-md) 0}.card-text{color:var(--text-color);line-height:var(--line-height-relaxed)}.form-group{margin-bottom:var(--spacing-2xl)}.form-label{display:block;font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--text-color);margin-bottom:var(--spacing-sm)}.form-label.required:after{content:" *";color:var(--danger-color)}.form-input,.form-textarea,.form-select{width:100%;padding:var(--input-padding-y) var(--input-padding-x);font-size:var(--font-size-sm);line-height:var(--line-height-normal);color:var(--text-color);background-color:var(--background-color);border:1px solid var(--border-color);border-radius:var(--border-radius);transition:all var(--transition-base);min-height:var(--input-height);font-family:var(--font-family-sans)}.form-input:focus,.form-textarea:focus,.form-select:focus{outline:none;border-color:var(--border-color-focus);box-shadow:0 0 0 3px #3b82f61a}.form-input:disabled,.form-textarea:disabled,.form-select:disabled{background-color:var(--gray-50);color:var(--text-color-muted);cursor:not-allowed}.form-input.error,.form-textarea.error,.form-select.error{border-color:var(--danger-color)}.form-input.error:focus,.form-textarea.error:focus,.form-select.error:focus{box-shadow:0 0 0 3px #ef44441a}.form-textarea{resize:vertical;min-height:80px}.form-select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%236b7280'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd' /%3E%3C/svg%3E");background-position:right var(--spacing-md) center;background-size:1rem;background-repeat:no-repeat;padding-right:2.5rem;-webkit-appearance:none;-moz-appearance:none;appearance:none}.form-error{display:block;font-size:var(--font-size-xs);color:var(--danger-color);margin-top:var(--spacing-xs)}.form-help{display:block;font-size:var(--font-size-xs);color:var(--text-color-secondary);margin-top:var(--spacing-xs)}.form-checkbox,.form-radio{display:inline-flex;align-items:center;cursor:pointer;font-size:var(--font-size-sm);color:var(--text-color)}.form-checkbox input,.form-radio input{margin-right:var(--spacing-sm);cursor:pointer}.loading-spinner{display:inline-block;width:20px;height:20px;border:2px solid var(--gray-200);border-top:2px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}.loading-dots{display:inline-flex;align-items:center;gap:var(--spacing-xs)}.loading-dots .dot{width:6px;height:6px;border-radius:50%;background-color:var(--primary-color);animation:dotPulse 1.4s ease-in-out infinite both}.loading-dots .dot:nth-child(1){animation-delay:-.32s}.loading-dots .dot:nth-child(2){animation-delay:-.16s}.loading-dots .dot:nth-child(3){animation-delay:0s}@keyframes dotPulse{0%,80%,to{transform:scale(.8);opacity:.5}40%{transform:scale(1);opacity:1}}.badge{display:inline-flex;align-items:center;padding:var(--spacing-xs) var(--spacing-sm);font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);border-radius:var(--border-radius-full);white-space:nowrap}.badge-primary{background-color:var(--primary-color-lightest);color:var(--primary-color-dark)}.badge-secondary{background-color:var(--gray-100);color:var(--gray-700)}.badge-success{background-color:#d1fae5;color:var(--success-color-dark)}.badge-warning{background-color:#fef3c7;color:var(--warning-color-dark)}.badge-danger{background-color:#fee2e2;color:var(--danger-color-dark)}.progress{width:100%;height:8px;background-color:var(--gray-200);border-radius:var(--border-radius-full);overflow:hidden}.progress-bar{height:100%;background:linear-gradient(90deg,var(--primary-color) 0%,var(--primary-color-dark) 100%);border-radius:var(--border-radius-full);transition:width var(--transition-slow)}.progress-sm{height:4px}.progress-lg{height:12px}.divider{border:none;height:1px;background-color:var(--border-color);margin:var(--spacing-2xl) 0}.divider-vertical{width:1px;height:auto;background-color:var(--border-color);margin:0 var(--spacing-2xl)}.tooltip{position:relative;display:inline-block}.tooltip-content{position:absolute;bottom:125%;left:50%;transform:translate(-50%);background-color:var(--gray-800);color:var(--text-color-inverse);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--border-radius);font-size:var(--font-size-xs);white-space:nowrap;z-index:var(--z-index-tooltip);opacity:0;visibility:hidden;transition:all var(--transition-base)}.tooltip:hover .tooltip-content{opacity:1;visibility:visible}.tooltip-content:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:5px solid transparent;border-top-color:var(--gray-800)}.course-analytics{background-color:var(--background-color, #ffffff);min-height:400px}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;color:var(--text-secondary, #6b7280)}.loading-spinner{width:2rem;height:2rem;border:2px solid var(--border-color, #e5e7eb);border-top:2px solid var(--primary-color, #6366f1);border-radius:50%;animation:spin 1s linear infinite;margin-bottom:1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.error-message,.no-data-message{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:3rem;text-align:center}.error-message{color:var(--error-color, #ef4444)}.no-data-message{color:var(--text-secondary, #6b7280)}.no-data-message h3{margin:1rem 0 .5rem;font-size:1.125rem;font-weight:600}.section-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem;border-bottom:1px solid var(--border-color, #e5e7eb);background-color:var(--background-color, #ffffff)}.section-title{font-size:1.25rem;font-weight:600;color:var(--text-color, #1f2937);margin:0}.section-actions{display:flex;gap:.75rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 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