@keyframes modalSlideIn{0%{opacity:0;transform:translateY(-20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}.sidebar.collapsed{overflow:hidden}#canvas{background:var(--theme-page-pattern, var(--theme-background, #ffffff));font-family:var(--theme-font-body, 'Inter', sans-serif)}#canvas h1,#canvas h2,#canvas h3,#canvas h4,#canvas h5,#canvas h6{font-family:var(--theme-font-heading, var(--theme-font-body, 'Inter', sans-serif));letter-spacing:.5px}#canvas .canvas-element .btn,#canvas .canvas-element button,#canvas .element-button{border-radius:var(--theme-button-radius, 6px);padding:.75rem 1.25rem;font-weight:600;display:inline-flex;align-items:center;gap:.5rem;transition:background .25s ease,transform .25s ease,box-shadow .25s ease}#canvas .canvas-element .btn:hover,#canvas .canvas-element button:hover,#canvas .element-button:hover{transform:translateY(-2px);box-shadow:0 6px 18px -4px rgba(0,0,0,.15)}#canvas .canvas-element .btn:active,#canvas .canvas-element button:active,#canvas .element-button:active{transform:translateY(0);box-shadow:0 3px 10px -2px rgba(0,0,0,.18)}#canvas .canvas-element.columns,#canvas .canvas-element.container{background:var(--theme-surface, #ffffff);border:1px solid var(--theme-border, #e2e8f0);border-radius:12px;padding:1.25rem;box-shadow:0 4px 14px -6px rgba(0,0,0,.08)}#canvas .canvas-element.columns:hover,#canvas .canvas-element.container:hover{box-shadow:0 6px 20px -4px rgba(0,0,0,.1)}#propertiesPanel.collapsed{width:48px}.sidebar{transition:width .2s ease}.element-divider{height:1px;border:0;border-top:1px solid var(--theme-border, var(--color-border));background:0 0;margin:var(--space-16)0}.carousel-image-placeholder{display:flex;align-items:center;justify-content:center;background:var(--theme-surface-alt, var(--color-secondary));color:var(--theme-text-secondary, var(--color-text-secondary));border:1px dashed var(--theme-border, var(--color-border));font-size:var(--font-size-sm)}.carousel-nav{background:var(--theme-surface, var(--color-surface));color:var(--theme-text, var(--color-text));border:1px solid var(--theme-border, var(--color-border));transition:background var(--duration-fast) var(--ease-standard),transform var(--duration-fast) var(--ease-standard)}.carousel-dot,.carousel-nav:hover{background:var(--theme-surface-alt, var(--color-secondary))}.carousel-dot{border:2px solid var(--theme-border, var(--color-border));width:12px;height:12px;border-radius:50%;padding:0;cursor:pointer}.carousel-dot.active{background:var(--theme-primary, var(--color-primary));border-color:var(--theme-active-border, var(--color-primary))}:root{--color-white:rgba(255, 255, 255, 1);--color-black:rgba(0, 0, 0, 1);--color-cream-50:rgba(252, 252, 249, 1);--color-cream-100:rgba(255, 255, 253, 1);--color-gray-200:rgba(245, 245, 245, 1);--color-gray-300:rgba(167, 169, 169, 1);--color-gray-400:rgba(119, 124, 124, 1);--color-slate-500:rgba(98, 108, 113, 1);--color-brown-600:rgba(94, 82, 64, 1);--color-charcoal-700:rgba(31, 33, 33, 1);--color-charcoal-800:rgba(38, 40, 40, 1);--color-slate-900:rgba(19, 52, 59, 1);--color-teal-300:rgba(50, 184, 198, 1);--color-teal-400:rgba(45, 166, 178, 1);--color-teal-500:rgba(33, 128, 141, 1);--color-teal-600:rgba(29, 116, 128, 1);--color-teal-700:rgba(26, 104, 115, 1);--color-teal-800:rgba(41, 150, 161, 1);--color-red-400:rgba(255, 84, 89, 1);--color-red-500:rgba(192, 21, 47, 1);--color-orange-400:rgba(230, 129, 97, 1);--color-orange-500:rgba(168, 75, 47, 1);--color-brown-600-rgb:94, 82, 64;--color-teal-500-rgb:33, 128, 141;--color-slate-900-rgb:19, 52, 59;--color-slate-500-rgb:98, 108, 113;--color-red-500-rgb:192, 21, 47;--color-red-400-rgb:255, 84, 89;--color-orange-500-rgb:168, 75, 47;--color-orange-400-rgb:230, 129, 97;--color-bg-1:rgba(59, 130, 246, 0.08);--color-bg-2:rgba(245, 158, 11, 0.08);--color-bg-3:rgba(34, 197, 94, 0.08);--color-bg-4:rgba(239, 68, 68, 0.08);--color-bg-5:rgba(147, 51, 234, 0.08);--color-bg-6:rgba(249, 115, 22, 0.08);--color-bg-7:rgba(236, 72, 153, 0.08);--color-bg-8:rgba(6, 182, 212, 0.08);--color-background:var(--color-cream-50);--color-surface:var(--color-cream-100);--color-text:var(--color-slate-900);--color-text-secondary:var(--color-slate-500);--color-primary:var(--color-teal-500);--color-primary-hover:var(--color-teal-600);--color-primary-active:var(--color-teal-700);--color-secondary:rgba(var(--color-brown-600-rgb), 0.12);--color-secondary-hover:rgba(var(--color-brown-600-rgb), 0.2);--color-secondary-active:rgba(var(--color-brown-600-rgb), 0.25);--color-border:rgba(var(--color-brown-600-rgb), 0.2);--color-btn-primary-text:var(--color-cream-50);--color-card-border:rgba(var(--color-brown-600-rgb), 0.12);--color-card-border-inner:rgba(var(--color-brown-600-rgb), 0.12);--color-error:var(--color-red-500);--color-success:var(--color-teal-500);--color-warning:var(--color-orange-500);--color-info:var(--color-slate-500);--color-focus-ring:rgba(var(--color-teal-500-rgb), 0.4);--color-select-caret:rgba(var(--color-slate-900-rgb), 0.8);--focus-ring:0 0 0 3px var(--color-focus-ring);--focus-outline:2px solid var(--color-primary);--status-bg-opacity:0.15;--status-border-opacity:0.25;--select-caret-light:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");--select-caret-dark:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");--color-success-rgb:33, 128, 141;--color-error-rgb:192, 21, 47;--color-warning-rgb:168, 75, 47;--color-info-rgb:98, 108, 113;--font-family-base:"FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-family-mono:"Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;--font-size-xs:11px;--font-size-sm:12px;--font-size-base:14px;--font-size-md:14px;--font-size-lg:16px;--font-size-xl:18px;--font-size-2xl:20px;--font-size-3xl:24px;--font-size-4xl:30px;--font-weight-normal:400;--font-weight-medium:500;--font-weight-semibold:550;--font-weight-bold:600;--line-height-tight:1.2;--line-height-normal:1.5;--letter-spacing-tight:-0.01em;--space-0:0;--space-1:1px;--space-2:2px;--space-4:4px;--space-6:6px;--space-8:8px;--space-10:10px;--space-12:12px;--space-16:16px;--space-20:20px;--space-24:24px;--space-32:32px;--radius-sm:6px;--radius-base:8px;--radius-md:10px;--radius-lg:12px;--radius-full:9999px;--shadow-xs:0 1px 2px rgba(0, 0, 0, 0.02);--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);--shadow-inset-sm:inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);--duration-fast:150ms;--duration-normal:250ms;--ease-standard:cubic-bezier(0.16, 1, 0.3, 1);--container-sm:640px;--container-md:768px;--container-lg:1024px;--container-xl:1280px}@media (prefers-color-scheme:dark){:root{--color-gray-400-rgb:119, 124, 124;--color-teal-300-rgb:50, 184, 198;--color-gray-300-rgb:167, 169, 169;--color-gray-200-rgb:245, 245, 245;--color-bg-1:rgba(29, 78, 216, 0.15);--color-bg-2:rgba(180, 83, 9, 0.15);--color-bg-3:rgba(21, 128, 61, 0.15);--color-bg-4:rgba(185, 28, 28, 0.15);--color-bg-5:rgba(107, 33, 168, 0.15);--color-bg-6:rgba(194, 65, 12, 0.15);--color-bg-7:rgba(190, 24, 93, 0.15);--color-bg-8:rgba(8, 145, 178, 0.15);--color-background:var(--color-charcoal-700);--color-surface:var(--color-charcoal-800);--color-text:var(--color-gray-200);--color-text-secondary:rgba(var(--color-gray-300-rgb), 0.7);--color-primary:var(--color-teal-300);--color-primary-hover:var(--color-teal-400);--color-primary-active:var(--color-teal-800);--color-secondary:rgba(var(--color-gray-400-rgb), 0.15);--color-secondary-hover:rgba(var(--color-gray-400-rgb), 0.25);--color-secondary-active:rgba(var(--color-gray-400-rgb), 0.3);--color-border:rgba(var(--color-gray-400-rgb), 0.3);--color-error:var(--color-red-400);--color-success:var(--color-teal-300);--color-warning:var(--color-orange-400);--color-info:var(--color-gray-300);--color-focus-ring:rgba(var(--color-teal-300-rgb), 0.4);--color-btn-primary-text:var(--color-slate-900);--color-card-border:rgba(var(--color-gray-400-rgb), 0.2);--color-card-border-inner:rgba(var(--color-gray-400-rgb), 0.15);--shadow-inset-sm:inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);--button-border-secondary:rgba(var(--color-gray-400-rgb), 0.2);--color-border-secondary:rgba(var(--color-gray-400-rgb), 0.2);--color-select-caret:rgba(var(--color-gray-200-rgb), 0.8);--focus-ring:0 0 0 3px var(--color-focus-ring);--focus-outline:2px solid var(--color-primary);--status-bg-opacity:0.15;--status-border-opacity:0.25;--select-caret-light:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");--select-caret-dark:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");--color-success-rgb:var(--color-teal-300-rgb);--color-error-rgb:var(--color-red-400-rgb);--color-warning-rgb:var(--color-orange-400-rgb);--color-info-rgb:var(--color-gray-300-rgb)}}[data-color-scheme=dark]{--color-gray-400-rgb:119, 124, 124;--color-teal-300-rgb:50, 184, 198;--color-gray-300-rgb:167, 169, 169;--color-gray-200-rgb:245, 245, 245;--color-bg-1:rgba(29, 78, 216, 0.15);--color-bg-2:rgba(180, 83, 9, 0.15);--color-bg-3:rgba(21, 128, 61, 0.15);--color-bg-4:rgba(185, 28, 28, 0.15);--color-bg-5:rgba(107, 33, 168, 0.15);--color-bg-6:rgba(194, 65, 12, 0.15);--color-bg-7:rgba(190, 24, 93, 0.15);--color-bg-8:rgba(8, 145, 178, 0.15);--color-background:var(--color-charcoal-700);--color-surface:var(--color-charcoal-800);--color-text:var(--color-gray-200);--color-text-secondary:rgba(var(--color-gray-300-rgb), 0.7);--color-primary:var(--color-teal-300);--color-primary-hover:var(--color-teal-400);--color-primary-active:var(--color-teal-800);--color-secondary:rgba(var(--color-gray-400-rgb), 0.15);--color-secondary-hover:rgba(var(--color-gray-400-rgb), 0.25);--color-secondary-active:rgba(var(--color-gray-400-rgb), 0.3);--color-border:rgba(var(--color-gray-400-rgb), 0.3);--color-error:var(--color-red-400);--color-success:var(--color-teal-300);--color-warning:var(--color-orange-400);--color-info:var(--color-gray-300);--color-focus-ring:rgba(var(--color-teal-300-rgb), 0.4);--color-btn-primary-text:var(--color-slate-900);--color-card-border:rgba(var(--color-gray-400-rgb), 0.15);--color-card-border-inner:rgba(var(--color-gray-400-rgb), 0.15);--shadow-inset-sm:inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);--color-border-secondary:rgba(var(--color-gray-400-rgb), 0.2);--color-select-caret:rgba(var(--color-gray-200-rgb), 0.8);--focus-ring:0 0 0 3px var(--color-focus-ring);--focus-outline:2px solid var(--color-primary);--status-bg-opacity:0.15;--status-border-opacity:0.25;--select-caret-light:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");--select-caret-dark:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");--color-success-rgb:var(--color-teal-300-rgb);--color-error-rgb:var(--color-red-400-rgb);--color-warning-rgb:var(--color-orange-400-rgb);--color-info-rgb:var(--color-gray-300-rgb)}[data-color-scheme=light]{--color-brown-600-rgb:94, 82, 64;--color-teal-500-rgb:33, 128, 141;--color-slate-900-rgb:19, 52, 59;--color-background:var(--color-cream-50);--color-surface:var(--color-cream-100);--color-text:var(--color-slate-900);--color-text-secondary:var(--color-slate-500);--color-primary:var(--color-teal-500);--color-primary-hover:var(--color-teal-600);--color-primary-active:var(--color-teal-700);--color-secondary:rgba(var(--color-brown-600-rgb), 0.12);--color-secondary-hover:rgba(var(--color-brown-600-rgb), 0.2);--color-secondary-active:rgba(var(--color-brown-600-rgb), 0.25);--color-border:rgba(var(--color-brown-600-rgb), 0.2);--color-btn-primary-text:var(--color-cream-50);--color-card-border:rgba(var(--color-brown-600-rgb), 0.12);--color-card-border-inner:rgba(var(--color-brown-600-rgb), 0.12);--color-error:var(--color-red-500);--color-success:var(--color-teal-500);--color-warning:var(--color-orange-500);--color-info:var(--color-slate-500);--color-focus-ring:rgba(var(--color-teal-500-rgb), 0.4);--color-success-rgb:var(--color-teal-500-rgb);--color-error-rgb:var(--color-red-500-rgb);--color-warning-rgb:var(--color-orange-500-rgb);--color-info-rgb:var(--color-slate-500-rgb)}html{font-size:var(--font-size-base);font-family:var(--font-family-base);line-height:var(--line-height-normal);color:var(--color-text);background-color:var(--color-background);-webkit-font-smoothing:antialiased;box-sizing:border-box}body{margin:0;padding:0}*,::after,::before{box-sizing:inherit}h1,h2,h3,h4,h5,h6{margin:0;font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight);color:var(--color-text);letter-spacing:var(--letter-spacing-tight)}h1{font-size:var(--font-size-4xl)}h2{font-size:var(--font-size-3xl)}h3{font-size:var(--font-size-2xl)}h4{font-size:var(--font-size-xl)}h5{font-size:var(--font-size-lg)}h6{font-size:var(--font-size-md)}p{margin:0 0 var(--space-16)0}.btn,a{text-decoration:none}a{color:var(--color-primary);transition:color var(--duration-fast) var(--ease-standard)}a:hover{color:var(--color-primary-hover)}code,pre{font-family:var(--font-family-mono);font-size:calc(var(--font-size-base)*.95);background-color:var(--color-secondary);border-radius:var(--radius-sm)}code{padding:var(--space-1) var(--space-4)}pre{padding:var(--space-16);margin:var(--space-16)0;overflow:auto;border:1px solid var(--color-border)}pre code{background:0 0;padding:0}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--space-8) var(--space-16);border-radius:var(--radius-base);font-size:var(--font-size-base);font-weight:500;line-height:1.5;cursor:pointer;transition:all var(--duration-normal) var(--ease-standard);border:0;position:relative}.btn:focus-visible{outline:0;box-shadow:var(--focus-ring)}#courseConfigModal .view-toggle .btn.active,.btn--primary{background:var(--color-primary);color:var(--color-btn-primary-text)}.btn--primary:hover{background:var(--color-primary-hover)}.btn--primary:active{background:var(--color-primary-active)}.btn--secondary{background:var(--color-secondary);color:var(--color-text)}.btn--secondary:hover{background:var(--color-secondary-hover)}.btn--secondary:active{background:var(--color-secondary-active)}.btn--outline{background:0 0;border:1px solid var(--color-border);color:var(--color-text)}.btn--outline:hover{background:var(--color-secondary)}.btn--sm{padding:var(--space-4) var(--space-12);font-size:var(--font-size-sm);border-radius:var(--radius-sm)}.btn--lg{padding:var(--space-10) var(--space-20);font-size:var(--font-size-lg);border-radius:var(--radius-md)}.btn--full-width{width:100%}.btn:disabled{opacity:.5;cursor:not-allowed}.form-control{display:block;width:100%;padding:var(--space-8) var(--space-8);font-size:var(--font-size-md);line-height:1.5;color:var(--color-text);background-color:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-base);transition:border-color var(--duration-fast) var(--ease-standard),box-shadow var(--duration-fast) var(--ease-standard)}textarea.form-control{font-family:var(--font-family-base);font-size:var(--font-size-base)}select.form-control{padding:var(--space-8) var(--space-12);-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:var(--select-caret-light);background-repeat:no-repeat;background-position:right var(--space-12) center;background-size:16px;padding-right:var(--space-32)}@media (prefers-color-scheme:dark){select.form-control{background-image:var(--select-caret-dark)}}[data-color-scheme=dark] select.form-control{background-image:var(--select-caret-dark)}[data-color-scheme=light] select.form-control{background-image:var(--select-caret-light)}.form-control:focus{border-color:var(--color-primary);outline:var(--focus-outline)}.form-label{display:block;margin-bottom:var(--space-8);font-weight:var(--font-weight-medium);font-size:var(--font-size-sm)}.form-group{margin-bottom:var(--space-16)}.card{background-color:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-card-border);box-shadow:var(--shadow-sm);overflow:hidden;transition:box-shadow var(--duration-normal) var(--ease-standard)}.card:hover{box-shadow:var(--shadow-md)}.card__body{padding:var(--space-16)}.card__footer,.card__header{padding:var(--space-16);border-bottom:1px solid var(--color-card-border-inner)}.status{display:inline-flex;align-items:center;padding:var(--space-6) var(--space-12);border-radius:var(--radius-full);font-weight:var(--font-weight-medium);font-size:var(--font-size-sm)}.status--success{background-color:rgba(var(--color-success-rgb, 33, 128, 141),var(--status-bg-opacity));color:var(--color-success);border:1px solid rgba(var(--color-success-rgb, 33, 128, 141),var(--status-border-opacity))}.status--error{background-color:rgba(var(--color-error-rgb, 192, 21, 47),var(--status-bg-opacity));color:var(--color-error);border:1px solid rgba(var(--color-error-rgb, 192, 21, 47),var(--status-border-opacity))}.status--warning{background-color:rgba(var(--color-warning-rgb, 168, 75, 47),var(--status-bg-opacity));color:var(--color-warning);border:1px solid rgba(var(--color-warning-rgb, 168, 75, 47),var(--status-border-opacity))}.status--info{background-color:rgba(var(--color-info-rgb, 98, 108, 113),var(--status-bg-opacity));color:var(--color-info);border:1px solid rgba(var(--color-info-rgb, 98, 108, 113),var(--status-border-opacity))}.container{width:100%;margin-right:auto;margin-left:auto;padding-right:var(--space-16);padding-left:var(--space-16)}@media (min-width:640px){.container{max-width:var(--container-sm)}}@media (min-width:768px){.container{max-width:var(--container-md)}}@media (min-width:1024px){.container{max-width:var(--container-lg)}}@media (min-width:1280px){.container{max-width:var(--container-xl)}}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-4{gap:var(--space-4)}.gap-8{gap:var(--space-8)}.gap-16{gap:var(--space-16)}#courseConfigModal .modal-header .tabs,.m-0{margin:0}.mt-8{margin-top:var(--space-8)}.mb-8{margin-bottom:var(--space-8)}.mx-8{margin-left:var(--space-8);margin-right:var(--space-8)}.my-8{margin-top:var(--space-8);margin-bottom:var(--space-8)}.p-0{padding:0}.py-8{padding-top:var(--space-8);padding-bottom:var(--space-8)}.px-8{padding-left:var(--space-8);padding-right:var(--space-8)}.py-16{padding-top:var(--space-16);padding-bottom:var(--space-16)}.px-16{padding-left:var(--space-16);padding-right:var(--space-16)}.block{display:block}.hidden{display:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}:focus-visible{outline:var(--focus-outline);outline-offset:2px}[data-color-scheme=dark] .btn--outline{border:1px solid var(--color-border-secondary)}@font-face{font-family:"FKGroteskNeue";src:url(https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2)format("woff2")}.app{display:flex;flex-direction:column;height:100vh;background-color:var(--color-background);overflow:hidden}.header,.header__brand{display:flex;align-items:center}.header{justify-content:space-between;padding:var(--space-12) var(--space-24);background-color:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-sm);z-index:100}.header__brand{gap:var(--space-8)}.header__brand h1{font-size:var(--font-size-xl);margin:0;color:var(--color-primary);font-weight:var(--font-weight-bold)}.version{font-size:var(--font-size-xs);color:var(--color-text-secondary);background-color:var(--color-secondary);padding:var(--space-2) var(--space-6);border-radius:var(--radius-full)}.header__center{flex:1;display:flex;justify-content:center}.header-actions{display:flex;align-items:center;gap:var(--space-8)}.divider{width:1px;height:24px;background-color:var(--color-border);margin:0 var(--space-4)}.breakpoint-selector{min-width:180px}.header__actions{display:flex;gap:var(--space-8)}.main-layout{display:flex;flex:1;overflow:hidden}.sidebar{width:320px;background-color:var(--color-surface);border-right:1px solid var(--color-border);overflow-y:scroll;flex-shrink:0}.sidebar.collapsed{width:56px;min-width:56px;transition:width .2s;overflow-x:hidden}.sidebar.collapsed .element-library,.sidebar.collapsed .section-header .btn:not(#collapseSidebarBtn),.sidebar.collapsed .section-header h3,.sidebar.collapsed .sidebar-section,.sidebar.collapsed .template-grid,.sidebar.collapsed .theme-list{display:none}.sidebar.collapsed .section-header{justify-content:flex-end}.sidebar-section{border-bottom:1px solid var(--color-border)}.section-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-12) var(--space-16);background-color:rgba(var(--color-teal-500-rgb),.02);border-bottom:1px solid var(--color-card-border)}.properties-header h3,.section-header h3{font-size:var(--font-size-lg);margin:0}.no-pages-message{display:flex}.info-message-center{font-size:var(--font-size-xs);color:var(--color-text-secondary);margin:auto}.page-list{padding:var(--space-12)}.page-item,.page-item-content{display:flex;align-items:center}.page-item{justify-content:space-between;padding:var(--space-12) var(--space-16);border-radius:var(--radius-base);cursor:pointer;margin-bottom:var(--space-8);transition:all var(--duration-fast) var(--ease-standard);border:1px solid transparent;background-color:var(--color-background)}.page-item:hover{background-color:var(--color-secondary);border-color:var(--color-border);transform:translateX(2px)}.page-item.active{background-color:var(--color-primary);color:var(--color-btn-primary-text);border-color:var(--color-primary);box-shadow:var(--shadow-sm)}.page-item-content{gap:var(--space-8);flex:1}.page-thumbnail{width:40px;height:30px;border-radius:var(--radius-sm);border:1px solid var(--color-border);display:flex;align-items:center;justify-content:center;object-fit:cover;flex-shrink:0}.page-item.active .page-thumbnail{border-color:rgba(255,255,255,.3);box-shadow:0 0 0 2px rgba(255,255,255,.2)}.page-info{flex:1}.page-name{font-weight:var(--font-weight-medium);font-size:var(--font-size-sm);margin-bottom:var(--space-2)}.page-stats,.template-card p{font-size:var(--font-size-xs);color:var(--color-text-secondary)}.page-item.active .page-stats{color:rgba(255,255,255,.8)}.page-actions{display:flex;gap:var(--space-4);opacity:0;transition:opacity var(--duration-fast) var(--ease-standard)}.page-item:hover .page-actions,.template-card:hover .template-preview{opacity:1}.page-action-btn{width:24px;height:24px;border:0;background-color:transparent;color:var(--color-text-secondary);cursor:pointer;border-radius:var(--radius-sm);font-size:var(--font-size-sm);transition:all var(--duration-fast) var(--ease-standard);display:flex;align-items:center;justify-content:center}.page-action-btn:hover{background-color:rgba(var(--color-error-rgb),.1);color:var(--color-error)}.template-grid{display:grid;gap:var(--space-12);padding:var(--space-16)}.template-card{padding:var(--space-16);border:1px solid var(--color-border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--duration-normal) var(--ease-standard);background-color:var(--color-background)}.template-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.template-preview{width:100%;height:60px;background:linear-gradient(135deg,var(--color-bg-1),var(--color-bg-2));border-radius:var(--radius-base);margin-bottom:var(--space-12);display:flex;align-items:center;justify-content:center;font-size:var(--font-size-2xl);opacity:.6}.template-card p{margin:0;line-height:1.4}.template-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}.template-icon{font-size:24px;flex-shrink:0}.element-item .info .name,.template-title{font-size:var(--font-size-sm);color:var(--color-text)}.template-title{font-weight:var(--font-weight-semibold);margin:0;flex:1}.template-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.tag-badge{display:inline-block;padding:3px 8px;background:var(--color-primary);color:#fff;font-size:11px;font-weight:500;border-radius:4px;line-height:1.2}.element-library{padding:var(--space-16)}.element-category,.placeholder-content h2{margin-bottom:var(--space-20)}.canvas-title span,.element-category h4,.properties-header h3,.section-header h3,.zoom-controls button{font-weight:var(--font-weight-semibold);color:var(--color-text)}.element-category h4{font-size:var(--font-size-sm);margin-bottom:var(--space-12);padding-bottom:var(--space-6);border-bottom:1px solid var(--color-border)}.element-list{display:flex;flex-direction:column;gap:var(--space-6)}.element-item{display:flex;align-items:center;gap:var(--space-12);padding:var(--space-12) var(--space-16);border:1px solid var(--color-border);border-radius:var(--radius-base);cursor:grab;transition:all var(--duration-normal) var(--ease-standard);background-color:var(--color-background)}.element-item:hover{border-color:var(--color-primary);background-color:var(--color-secondary);transform:translateX(4px);box-shadow:var(--shadow-sm)}.element-item:active{cursor:grabbing;transform:translateX(2px) scale(.98)}.element-item .icon{font-size:var(--font-size-lg);width:24px;display:flex;align-items:center;justify-content:center}.element-item .info{flex:1}.element-item .info .name{font-weight:var(--font-weight-medium);margin-bottom:var(--space-2)}.element-item .info .description{font-size:var(--font-size-xs);color:var(--color-text-secondary);line-height:1.3}.theme-list{padding:var(--space-16);display:grid;gap:var(--space-8)}.theme-item,.theme-preview{border:1px solid var(--color-border)}.theme-item{display:flex;align-items:center;gap:var(--space-12);padding:var(--space-12) var(--space-16);border-radius:var(--radius-base);cursor:pointer;transition:all var(--duration-fast) var(--ease-standard);background-color:var(--color-background)}.theme-item:hover{border-color:var(--color-primary);transform:translateX(2px)}.theme-item.active{border-color:var(--color-primary);background-color:var(--color-secondary);box-shadow:var(--shadow-sm)}.theme-preview{width:32px;height:24px;border-radius:var(--radius-sm);flex-shrink:0}.theme-info{flex:1}.theme-name{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text)}.canvas-area{flex:1;display:flex;flex-direction:column;background:linear-gradient(135deg,var(--color-bg-1),var(--color-bg-2));overflow:hidden}.canvas-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-16) var(--space-24);background-color:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow-xs)}.canvas-title,.canvas-tools,.zoom-controls{display:flex;align-items:center;gap:var(--space-12)}.canvas-title span,.zoom-controls button{font-size:var(--font-size-lg)}.zoom-controls{gap:var(--space-4);padding:var(--space-4) var(--space-8);background-color:var(--color-secondary);border-radius:var(--radius-base)}.zoom-controls button{width:28px;height:28px;border:0;background-color:transparent;cursor:pointer;border-radius:var(--radius-sm);font-size:var(--font-size-sm);font-weight:var(--font-weight-bold);transition:background-color var(--duration-fast) var(--ease-standard)}.zoom-controls button:hover{background-color:var(--color-primary);color:var(--color-btn-primary-text)}.zoom-controls span{font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);min-width:40px;text-align:center}.canvas-wrapper{flex:1;padding:var(--space-32);overflow:auto;position:relative}.canvas{background-color:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);min-height:800px;margin:0 auto;position:relative;transition:all var(--duration-normal) var(--ease-standard);border:1px solid var(--color-border)}.canvas--desktop{max-width:1200px}.canvas--tablet{max-width:768px}.canvas--mobile{max-width:375px}.canvas-placeholder{display:flex;align-items:center;justify-content:center;height:100%;min-height:600px;padding:var(--space-32)}.placeholder-content{text-align:center;color:var(--color-text-secondary);max-width:400px}.placeholder-content h2{color:var(--color-text);font-size:var(--font-size-2xl)}.placeholder-content p{margin-bottom:var(--space-12);font-size:var(--font-size-md);line-height:1.6}.quick-actions{display:flex;justify-content:center;gap:var(--space-12)}.canvas-element{cursor:pointer;transition:all var(--duration-fast) var(--ease-standard);min-height:24px}.canvas-element.selected,.canvas-element:hover{border-color:var(--color-primary);box-shadow:0 0 0 1px var(--color-primary)}.canvas-element.selected{box-shadow:var(--focus-ring)}.canvas-element.dragging{opacity:.7;transform:rotate(2deg) scale(1.02)}.element-content{pointer-events:none;padding:var(--space-8)}.canvas-element.selected .element-content{pointer-events:all}.element-toolbar{position:absolute;top:-40px;right:0;display:none;gap:var(--space-4);background-color:var(--color-surface);padding:var(--space-4);border-radius:var(--radius-base);box-shadow:var(--shadow-md);border:1px solid var(--color-border);z-index:10}.canvas-element.selected .element-toolbar,.canvas-element:hover .element-toolbar{display:flex}.element-tool-btn,.quick-tips h4{font-size:var(--font-size-sm);color:var(--color-text)}.element-tool-btn{width:28px;height:28px;border:0;background-color:var(--color-secondary);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--duration-fast) var(--ease-standard);display:flex;align-items:center;justify-content:center}.element-tool-btn:hover{background-color:var(--color-primary);color:var(--color-btn-primary-text);transform:scale(1.1)}.element-tool-btn--delete:hover{background-color:var(--color-error);color:#fff}.properties-panel{width:360px;background-color:var(--color-surface);border-left:1px solid var(--color-border);flex-shrink:0;display:flex;flex-direction:column;overflow:hidden}.properties-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-16) var(--space-20);background-color:rgba(var(--color-teal-500-rgb),.02);border-bottom:1px solid var(--color-border)}.properties-content{flex:1;overflow-y:auto;padding:var(--space-20)}.no-selection{text-align:center;padding:var(--space-32) var(--space-16)}.no-selection-icon{font-size:48px;margin-bottom:var(--space-16);opacity:.5}.css-tips li,.no-selection p,.quick-tips li{color:var(--color-text-secondary);margin-bottom:var(--space-24)}.btn--outline.btn--xs,.quick-tips{border:1px solid var(--color-border)}.property-group,.quick-tips{padding:var(--space-16);border-radius:var(--radius-base)}.quick-tips{text-align:left;background-color:var(--color-bg-1)}.quick-tips h4{margin-bottom:var(--space-8)}.css-tips ul,.quick-tips ul{list-style:none;padding:0;margin:0}.css-tips li,.quick-tips li{font-size:var(--font-size-xs);margin-bottom:var(--space-4);padding-left:var(--space-16);position:relative}.css-tips li::before,.quick-tips li::before{content:"💡";position:absolute;left:0}.property-group{margin-bottom:var(--space-24);background-color:var(--color-background);border:1px solid var(--color-border)}.modal-header h3,.property-group h4{color:var(--color-text);font-weight:var(--font-weight-semibold)}.property-group h4{font-size:var(--font-size-sm);margin-bottom:var(--space-16);display:flex;align-items:center;gap:var(--space-8)}.property-group h4::before{content:"⚙️";font-size:var(--font-size-base)}.property-row{margin-bottom:var(--space-12)}.property-row--inline{display:flex;align-items:center;gap:var(--space-12)}.property-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-8)}.checkbox-wrapper,.color-input{display:flex;align-items:center;gap:var(--space-8)}.checkbox-wrapper input[type=checkbox]{width:16px;height:16px;margin:0}.color-input input[type=color],.color-with-clear input[type=color],.gradient-controls input[type=color]{width:40px;height:32px;border:1px solid var(--color-border);border-radius:var(--radius-sm);cursor:pointer;background:0 0;padding:0;display:inline-block}.btn--xs{padding:4px 6px;font-size:12px;border-radius:6px;min-width:28px;height:32px;display:inline-flex;align-items:center;justify-content:center}.color-with-clear,.gradient-controls{display:flex;align-items:center;gap:var(--space-8)}.btn--outline.btn--xs{background:0 0;color:var(--color-text-secondary)}.btn--outline.btn--xs:hover{background:var(--color-secondary);color:var(--color-text)}.color-input input[type=text]{flex:1;font-family:var(--font-family-mono);font-size:var(--font-size-xs)}.status-bar,.url-preview{font-size:var(--font-size-xs);color:var(--color-text-secondary)}.url-preview{margin-top:var(--space-8);padding:var(--space-8);background-color:var(--color-secondary);border-radius:var(--radius-sm)}.url-preview.error{background-color:rgba(var(--color-error-rgb),.1);color:var(--color-error)}.url-preview.success{background-color:rgba(var(--color-success-rgb),.1);color:var(--color-success)}.status-bar{display:flex;justify-content:space-between;align-items:center;padding:var(--space-8) var(--space-24);background-color:var(--color-surface);border-top:1px solid var(--color-border);box-shadow:var(--shadow-inset-sm)}.status-actions,.status-info{display:flex;align-items:center;gap:var(--space-8)}.separator{opacity:.5}.modal{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:1000;backdrop-filter:blur(4px)}.modal.hidden{display:none}.modal-content{background-color:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:90%;max-width:500px;max-height:90vh;overflow:hidden;display:flex;flex-direction:column;animation:modalSlideIn var(--duration-normal) var(--ease-standard)}.modal-content--medium{max-width:700px}.modal-content--large{max-width:900px;max-height:80vh}.modal-content--fullscreen{width:95%;height:90vh;max-width:none;max-height:none}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-20) var(--space-24);border-bottom:1px solid var(--color-border);background-color:rgba(var(--color-teal-500-rgb),.02)}.modal-header h3{margin:0;font-size:var(--font-size-xl)}#courseConfigModal .modal-header,.preview-controls{display:flex;gap:var(--space-8)}#courseConfigModal .modal-header-top{display:flex;align-items:center;justify-content:space-between}.preview-controls{align-items:center}.modal-close{background:0 0;border:0;font-size:var(--font-size-2xl);cursor:pointer;color:var(--color-text-secondary);transition:color var(--duration-fast) var(--ease-standard);width:32px;height:32px;border-radius:var(--radius-base);display:flex;align-items:center;justify-content:center}.modal-close:hover,.tab-btn:hover{color:var(--color-text);background-color:var(--color-secondary)}.modal-body{flex:1;overflow-y:auto;padding:var(--space-24)}.modal-footer{display:flex;justify-content:flex-end;gap:var(--space-12);padding:12px 16px;border-top:1px solid var(--color-border);background-color:var(--color-bg-1)}.tabs{display:flex;border-bottom:1px solid var(--color-border);margin-bottom:var(--space-24)}.export-preview li,.tab-btn{font-size:var(--font-size-sm)}.css-tips code,.tab-btn{font-weight:var(--font-weight-medium)}.tab-btn{padding:var(--space-12) var(--space-20);border:0;background:0 0;color:var(--color-text-secondary);cursor:pointer;transition:all var(--duration-fast) var(--ease-standard);border-bottom:2px solid transparent}.tab-btn.active{color:var(--color-primary);border-bottom-color:var(--color-primary)}.tab-content{display:none}.tab-content.active{display:block}#courseConfigModal .modal-header{padding:12px 16px;flex-direction:row;align-items:center;justify-content:space-between}#courseConfigModal .modal-body{padding:16px}#courseConfigModal .tabs{margin-bottom:12px;gap:4px;flex-wrap:wrap;justify-content:flex-start}#courseConfigModal .tab-btn{padding:6px 12px;font-size:12px}#courseConfigModal .form-group{margin-bottom:12px}#courseConfigModal fieldset.form-group{margin-bottom:12px;padding:12px;border-radius:8px}#courseConfigModal .cfg-save-btn{margin-top:4px}.save-feedback-inline{display:inline-block}.css-editor-wrapper{border:1px solid var(--color-border);border-radius:var(--radius-base);overflow:hidden;margin-bottom:var(--space-16)}.css-editor,.css-tips h4{font-size:var(--font-size-sm);color:var(--color-text)}.css-editor,.css-tips{padding:var(--space-16)}.css-editor{width:100%;min-height:300px;border:0;font-family:var(--font-family-mono);line-height:1.5;resize:vertical;background-color:var(--color-background)}.css-tips{background-color:var(--color-bg-1);border-radius:var(--radius-base)}.css-tips h4{margin-bottom:var(--space-8)}.css-tips code{color:var(--color-primary)}.export-preview ul{list-style:none;padding:0;margin:var(--space-16)0 0 0}.export-preview li{padding:var(--space-8)0;display:flex;align-items:center;gap:var(--space-8)}.preview-frame,.preview-frame-wrapper{width:100%;border-radius:var(--radius-base)}.preview-frame-wrapper{height:100%;display:flex;justify-content:center;background:linear-gradient(135deg,var(--color-bg-1),var(--color-bg-3));padding:var(--space-16)}.preview-frame{min-height:600px;background-color:var(--color-surface);border:1px solid var(--color-border);padding:var(--space-20);box-shadow:var(--shadow-lg);overflow-y:auto;transition:max-width .3s ease}.preview-frame,.preview-frame--desktop{max-width:1200px}.preview-frame--tablet{max-width:768px}.preview-frame--mobile{max-width:375px}.drag-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background-color:rgba(var(--color-primary-rgb, 33, 128, 141),.1);z-index:999;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(2px)}.drag-overlay.hidden,.sidebar-section.collapsed .sidebar-section-content{display:none}.drag-placeholder{padding:var(--space-32);background-color:var(--color-surface);border:2px dashed var(--color-primary);border-radius:var(--radius-lg);color:var(--color-primary);text-align:center;box-shadow:var(--shadow-lg)}.drag-icon{font-size:48px;margin-bottom:var(--space-12)}.drag-text{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold)}.canvas.drag-over{background-color:rgba(var(--color-primary-rgb, 33, 128, 141),.02);border-color:var(--color-primary)}.element-heading{font-size:var(--font-size-3xl);font-weight:var(--font-weight-bold);margin-bottom:var(--space-16);color:var(--theme-text, var(--color-text));line-height:var(--line-height-tight)}.element-list li,.element-paragraph{line-height:var(--line-height-normal)}.element-paragraph{font-size:var(--font-size-base);color:var(--theme-text, var(--color-text));margin-bottom:var(--space-16)}.element-list ol,.element-list ul{padding-left:var(--space-24);margin-bottom:var(--space-16)}.element-list li{margin-bottom:var(--space-6)}.element-button,.media-element iframe{border:0;border-radius:var(--radius-base)}.element-button{display:inline-block;padding:var(--space-12) var(--space-24);background-color:var(--theme-primary, var(--color-primary));color:#fff;font-size:var(--font-size-base);font-weight:var(--font-weight-medium);cursor:pointer;text-decoration:none;transition:all var(--duration-fast) var(--ease-standard);box-shadow:var(--shadow-sm)}.element-button:hover{opacity:.9;transform:translateY(-1px);box-shadow:var(--shadow-md)}.element-link{color:var(--theme-primary, var(--color-primary));text-decoration:underline;transition:color var(--duration-fast) var(--ease-standard)}.element-link:hover{opacity:.8}.element-container{padding:var(--space-24);background-color:var(--theme-surface, var(--color-bg-1));border-radius:var(--radius-lg);margin-bottom:var(--space-16);border:1px solid var(--color-border)}.element-columns{display:grid;gap:var(--space-20);margin-bottom:var(--space-16)}.element-columns--2{grid-template-columns:1fr 1fr}.element-columns--3{grid-template-columns:1fr 1fr 1fr}.element-columns--4{grid-template-columns:1fr 1fr 1fr 1fr}.element-spacer{height:var(--space-32);background:linear-gradient(90deg,transparent,var(--theme-border, var(--color-border)),transparent);opacity:.3}.media-element{max-width:100%;border-radius:var(--radius-base);overflow:hidden;box-shadow:var(--shadow-sm)}.media-element img{max-width:100%;height:auto;display:block}.media-element audio,.media-element video{width:100%;max-width:100%}.media-element iframe{width:100%;height:315px}.media-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:200px;background-color:var(--color-bg-2);border:2px dashed var(--color-border);border-radius:var(--radius-base);color:var(--color-text-secondary);text-align:center;padding:var(--space-20)}.media-placeholder .placeholder-icon{font-size:48px;margin-bottom:var(--space-12);opacity:.6}.form-group small{display:block;margin-top:var(--space-4)}@media (max-width:1200px){.sidebar{width:280px}.properties-panel{width:320px}.header__center{display:none}}@media (max-width:768px){.main-layout{flex-direction:column}.properties-panel,.sidebar{width:100%;max-height:300px;order:1}.canvas-area{flex:1;order:0;min-height:50vh}.header__brand .version{display:none}.header__actions{gap:var(--space-4)}.header__actions .btn{font-size:var(--font-size-xs);padding:var(--space-6) var(--space-10)}.canvas-wrapper{padding:var(--space-16)}}.sidebar-section .section-header{cursor:pointer}#courseConfigModal .asset-library.layout-grid{display:grid;grid-template-columns:300px 1fr;gap:var(--space-16)}#courseConfigModal .asset-sidebar{position:sticky;top:0;align-self:start}#courseConfigModal .asset-upload-section{margin-bottom:var(--space-16);padding:var(--space-16);border:2px dashed var(--color-border);border-radius:var(--radius-lg);background:var(--color-background)}#courseConfigModal .asset-upload-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-12)}#courseConfigModal .asset-tips li,#courseConfigModal .asset-upload-section .helper,.form-group small{font-size:var(--font-size-xs);color:var(--color-text-secondary)}#courseConfigModal .asset-tips{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);padding:var(--space-12)}#courseConfigModal .asset-tips h5{margin:0 0 var(--space-8)0;font-size:var(--font-size-sm)}#courseConfigModal .asset-tips ul{margin:0;padding-left:var(--space-16)}#courseConfigModal .asset-tips li{margin-bottom:var(--space-4)}#courseConfigModal .asset-content{display:flex;flex-direction:column;min-width:0}#courseConfigModal .asset-toolbar{display:flex;justify-content:space-between;gap:var(--space-8);margin-bottom:var(--space-12)}#courseConfigModal .asset-toolbar .left{flex-wrap:wrap}#courseConfigModal .asset-toolbar .left,#courseConfigModal .asset-toolbar .right{display:flex;gap:var(--space-8);align-items:center}#courseConfigModal .input-icon{position:relative}#courseConfigModal .input-icon span{position:absolute;left:8px;top:50%;transform:translateY(-50%);font-size:14px;opacity:.7}#courseConfigModal .input-icon input{padding-left:28px}#courseConfigModal .view-toggle .btn{min-width:36px}#courseConfigModal .asset-list{border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);padding:var(--space-12);min-height:200px}#courseConfigModal .asset-list--grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:var(--space-12)}#courseConfigModal .asset-card{display:flex;flex-direction:column;gap:var(--space-8);border:1px solid var(--color-card-border);border-radius:var(--radius-base);padding:var(--space-8);background:var(--color-background);transition:box-shadow var(--duration-fast) var(--ease-standard),transform var(--duration-fast) var(--ease-standard)}#courseConfigModal .asset-card:hover{box-shadow:var(--shadow-sm);transform:translateY(-1px)}#courseConfigModal .asset-thumb{width:100%;aspect-ratio:4/3;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-secondary);display:flex;align-items:center;justify-content:center;overflow:hidden}#courseConfigModal .asset-thumb img{width:100%;height:100%;object-fit:cover;display:block}#courseConfigModal .asset-badge{position:absolute;right:6px;top:6px;font-size:10px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:2px 6px}#courseConfigModal .asset-info{min-width:0}#courseConfigModal .asset-name{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}#courseConfigModal .asset-meta{font-size:var(--font-size-xs);color:var(--color-text-secondary)}#courseConfigModal .asset-actions{display:flex;gap:var(--space-6)}#courseConfigModal .asset-list--list{display:flex;flex-direction:column;gap:var(--space-8)}#courseConfigModal .asset-row{display:grid;grid-template-columns:56px 1.6fr .8fr .6fr .8fr auto;gap:var(--space-8);align-items:center;border:1px solid var(--color-card-border);border-radius:var(--radius-base);padding:var(--space-8);background:var(--color-background)}#courseConfigModal .asset-row .asset-thumb{aspect-ratio:1/1}#courseConfigModal .asset-col--muted{font-size:var(--font-size-xs);color:var(--color-text-secondary)}@media (max-width:900px){#courseConfigModal .asset-library.layout-grid{grid-template-columns:1fr}#courseConfigModal .asset-toolbar .left{width:100%}}.element-mcq,.element-mrq{padding:var(--space-16);background:var(--theme-surface, var(--color-surface));border:1px solid var(--theme-border, var(--color-border));border-radius:var(--radius-base);margin-bottom:var(--space-16)}.mcq-question,.mrq-question{font-weight:var(--font-weight-semibold);margin-bottom:var(--space-12);color:var(--theme-text, var(--color-text))}.mcq-options label,.mrq-options label{display:block;margin-bottom:var(--space-8);cursor:pointer;user-select:none}.mcq-options input[type=radio],.mrq-options input[type=checkbox]{margin-right:var(--space-8)}.mcq-icon,.mrq-icon{margin-left:var(--space-8);font-weight:var(--font-weight-bold)}label.is-correct .mcq-icon,label.is-correct .mrq-icon{color:var(--theme-success, var(--color-success))}label.is-incorrect .mcq-icon,label.is-incorrect .mrq-icon{color:var(--theme-error, var(--color-error))}.feedback-success,label.is-missed .mrq-icon{color:var(--theme-success, var(--color-success))}.feedback-error{color:var(--theme-error, var(--color-error))}.feedback-warning{color:var(--theme-warning, var(--color-warning))}.element-table table,.element-table th{background:var(--theme-surface, var(--color-surface))}.element-table table{width:100%;border-collapse:collapse}.element-table th{font-weight:var(--font-weight-semibold)}.element-table td,.element-table th{border:1px solid var(--theme-border, var(--color-border));padding:var(--space-8);color:var(--theme-text, var(--color-text));text-align:left}.element-table tr:nth-child(even) td{background:var(--theme-surface-alt, var(--color-secondary))}