:root{--lambda-main: #f9bf3b;--lambda-main-dark: #eba600;--lambda-secondary: #5f6870;--lambda-page-bg: #f2f4f6;--lambda-header: #ffffff;--color-primary: var(--lambda-main);--color-primary-dark: var(--lambda-main-dark);--color-primary-light: #fff4d2;--color-secondary: var(--lambda-secondary);--color-secondary-dark: #4e585d;--color-accent: #dc3545;--color-success: #28a745;--color-warning: #ffc107;--bg-app: var(--lambda-page-bg);--bg-card: #ffffff;--bg-overlay: rgba(255, 255, 255, .92);--text-main: #555555;--text-heading: #4e585d;--text-muted: #7b8084;--text-inverted: #1f252b;--border-subtle: #dfe3e6;--input-bg: #f8f9fa;--shadow-sm: 0 1px 1px rgba(0, 0, 0, .1);--shadow-md: 0 2px 5px rgba(0, 0, 0, .16);--shadow-lg: 1px 4px 20px -2px rgba(0, 0, 0, .2);--radius-sm: 2px;--radius-md: 4px;--radius-lg: 4px;--radius-full: 9999px;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-6: 1.5rem;--space-8: 2rem;--font-sans: "Open Sans", system-ui, -apple-system, sans-serif;--font-display: "Open Sans", system-ui, -apple-system, sans-serif}html.dark{--lambda-header: #20262c;--lambda-page-bg: #15191d;--color-primary: #f9bf3b;--color-primary-dark: #ffd166;--color-primary-light: rgba(249, 191, 59, .18);--color-secondary: #88939d;--color-secondary-dark: #a1acb5;--bg-app: var(--lambda-page-bg);--bg-card: #20262c;--bg-overlay: rgba(32, 38, 44, .92);--text-main: #e8ecef;--text-heading: #f5f6f7;--text-muted: #a8b0b8;--text-inverted: #1f252b;--border-subtle: #384149;--input-bg: #2b333a;--shadow-sm: 0 1px 1px rgba(0, 0, 0, .35);--shadow-md: 0 2px 5px rgba(0, 0, 0, .36);--shadow-lg: 1px 4px 20px -2px rgba(0, 0, 0, .45)}@media(prefers-color-scheme:dark){html:not(.light){--lambda-header: #20262c;--lambda-page-bg: #15191d;--color-primary: #f9bf3b;--color-primary-dark: #ffd166;--color-primary-light: rgba(249, 191, 59, .18);--color-secondary: #88939d;--color-secondary-dark: #a1acb5;--bg-app: var(--lambda-page-bg);--bg-card: #20262c;--bg-overlay: rgba(32, 38, 44, .92);--text-main: #e8ecef;--text-heading: #f5f6f7;--text-muted: #a8b0b8;--text-inverted: #1f252b;--border-subtle: #384149;--input-bg: #2b333a;--shadow-sm: 0 1px 1px rgba(0, 0, 0, .35);--shadow-md: 0 2px 5px rgba(0, 0, 0, .36);--shadow-lg: 1px 4px 20px -2px rgba(0, 0, 0, .45)}}body{background-color:var(--bg-app);color:var(--text-main);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;transition:background-color .3s ease,color .3s ease;margin:0}h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;margin-top:0;color:var(--text-heading)}button{font-family:var(--font-sans)}.glass{background:var(--bg-overlay);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-subtle)}@font-face{font-family:Open Sans;src:url(/lambda-theme/fonts/OpenSans-Regular.ttf) format("truetype");font-weight:400;font-style:normal;font-display:swap}@font-face{font-family:Open Sans;src:url(/lambda-theme/fonts/OpenSans-Bold.ttf) format("truetype");font-weight:700;font-style:normal;font-display:swap}html,body{height:100%;width:100%;touch-action:manipulation;overflow-x:hidden}#root{min-height:100vh;display:flex;flex-direction:column;overflow-x:hidden}*,*:before,*:after{box-sizing:border-box}.app-loading-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--space-6);background:var(--bg-app)}.app-loading-panel{width:min(100%,26rem);display:grid;gap:var(--space-4);justify-items:center;padding:var(--space-6);background:var(--bg-card);border:1px solid var(--border-subtle);border-top:4px solid var(--color-primary);border-radius:var(--radius-md);box-shadow:var(--shadow-md);color:var(--text-main)}.app-loading-panel p{margin:0;font-weight:700;color:var(--text-heading)}.app-loading-spinner{inline-size:2.75rem;block-size:2.75rem;border-radius:50%;border:4px solid var(--border-subtle);border-top-color:var(--color-primary);animation:app-loading-spin .8s linear infinite}.app-loading-skeleton{width:100%;display:grid;gap:var(--space-3)}.app-loading-skeleton span{display:block;block-size:.9rem;border-radius:var(--radius-full);background:linear-gradient(90deg,var(--border-subtle) 0%,var(--input-bg) 48%,var(--border-subtle) 100%);background-size:220% 100%;animation:app-loading-shimmer 1.15s ease-in-out infinite}.app-loading-skeleton span:nth-child(1){width:88%}.app-loading-skeleton span:nth-child(2){width:100%}.app-loading-skeleton span:nth-child(3){width:72%}@keyframes app-loading-spin{to{transform:rotate(360deg)}}@keyframes app-loading-shimmer{0%{background-position:120% 0}to{background-position:-120% 0}}.btn{display:inline-flex;align-items:center;justify-content:center;border:none;cursor:pointer;font-family:var(--font-sans);font-weight:600;transition:background-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease;position:relative;overflow:hidden;gap:var(--space-2)}.btn:disabled{opacity:.6;cursor:not-allowed;pointer-events:none}.btn-primary{background-color:var(--color-primary);color:var(--text-inverted);border:1px solid var(--color-primary);border-radius:var(--radius-sm);box-shadow:var(--shadow-md)}.btn-primary:hover{background-color:var(--color-primary-dark);border-color:var(--color-primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn-secondary{background-color:var(--color-secondary);color:#fff;border:1px solid var(--color-secondary);border-radius:var(--radius-sm)}.btn-secondary:hover{background-color:var(--color-secondary-dark);border-color:var(--color-secondary-dark)}.btn-ghost{background-color:transparent;color:var(--text-muted);border:1px solid var(--border-subtle);border-radius:var(--radius-sm)}.btn-ghost:hover{background-color:var(--input-bg);color:var(--text-main)}.btn-icon{padding:0;border-radius:var(--radius-full);width:40px;height:40px}.btn-sm{padding:var(--space-1) var(--space-3);font-size:.875rem}.btn-md{padding:var(--space-2) var(--space-4);font-size:1rem}.btn-lg{padding:var(--space-3) var(--space-6);font-size:1.125rem}.btn-spinner{width:1em;height:1em;border:2px solid currentColor;border-right-color:transparent;border-radius:50%;animation:spin .75s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.card{background-color:var(--bg-card);border-radius:var(--radius-md);padding:var(--space-4);box-shadow:var(--shadow-md);border:1px solid var(--border-subtle);transition:transform .2s ease,box-shadow .2s ease;color:var(--text-main)}.card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}@media(hover:none),(pointer:coarse){.card-hover:hover{transform:none;box-shadow:var(--shadow-md)}}.card.glass{background:var(--bg-overlay);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.2)}@media(prefers-color-scheme:dark){.card.glass{border:1px solid rgba(255,255,255,.05)}}.progress-container{width:100%}.progress-header{display:flex;justify-content:space-between;margin-bottom:var(--space-1);font-size:.875rem;color:var(--text-muted);font-weight:500}.progress-track{background-color:var(--border-subtle);border-radius:var(--radius-full);overflow:hidden}.progress-fill{height:100%;border-radius:var(--radius-full);transition:width .3s ease}.progress-sm .progress-track{height:4px}.progress-md .progress-track{height:8px}.progress-lg .progress-track{height:12px}.dashboard-container{inline-size:min(90%,92.5rem);margin-inline:auto;padding-top:var(--space-4);padding-right:calc(var(--space-4) + env(safe-area-inset-right));padding-bottom:5rem;padding-left:calc(var(--space-4) + env(safe-area-inset-left))}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--space-6);padding:var(--space-4);background:var(--lambda-header);border-top:4px solid var(--color-primary);border-radius:var(--radius-md);border-right:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle);border-left:1px solid var(--border-subtle);box-shadow:var(--shadow-sm)}.header-title h1{font-size:1.5rem;margin:0;color:var(--text-heading)}.header-subtitle{color:var(--text-muted);font-size:.9rem;margin:0}.header-status{display:flex;align-items:center;gap:var(--space-3)}.status-pill{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-1) var(--space-3);background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border-subtle);font-size:.85rem;font-weight:500;box-shadow:var(--shadow-sm)}.status-dot{inline-size:.5rem;block-size:.5rem;border-radius:50%;background-color:var(--text-muted)}.status-dot.online{background-color:var(--color-success)}.status-dot.offline{background-color:var(--text-muted)}.hero-section{display:flex;flex-direction:column;gap:var(--space-4);margin-bottom:var(--space-8);padding:var(--space-6);background:var(--bg-card);border-left:8px solid var(--color-primary);border-radius:var(--radius-md)}.hero-content h2{font-size:2rem;color:var(--text-heading);margin-bottom:var(--space-2)}.hero-content p{color:var(--text-muted);max-inline-size:37.5rem;margin-bottom:var(--space-4)}.settings-toggle{margin-bottom:var(--space-6)}.settings-panel{display:flex;flex-direction:column;gap:var(--space-4)}.settings-user-info{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--space-3)}.settings-user-details p{margin:0}.settings-controls{display:flex;gap:var(--space-3);align-items:center;flex-wrap:wrap}.settings-controls label{display:flex;gap:var(--space-2);align-items:center;font-size:.85rem;color:var(--text-muted);cursor:pointer}.settings-divider{border:none;border-top:1px solid var(--border-subtle);margin:0}.dev-url-input{display:flex;align-items:center;gap:var(--space-2);font-size:.8rem;color:var(--text-muted)}.dev-url-input input{padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);border:1px solid var(--border-subtle);background:var(--input-bg);color:var(--text-main);font-size:.8rem;flex:1;min-inline-size:12.5rem}.theme-toggle-btn{font-size:1.25rem;padding:var(--space-1)!important;min-inline-size:2.25rem;block-size:2.25rem}.courses-section h2{font-size:1.5rem;margin-bottom:var(--space-4);display:flex;align-items:center;gap:var(--space-3)}.courses-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(18.75rem,100%),1fr));gap:var(--space-6);align-items:start}.course-card{display:flex;flex-direction:column;min-width:0}.course-image{position:relative;width:100%;min-height:9.25rem;height:9.25rem;border-radius:var(--radius-md);margin-bottom:var(--space-4);overflow:hidden}.course-image img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;border-radius:var(--radius-md);opacity:0;transition:opacity .2s ease;z-index:1}.course-placeholder{position:absolute;inset:0;background:linear-gradient(135deg,#f8f9fa,#fff4d2 52%,#f9bf3b);border-radius:var(--radius-md);overflow:hidden}.course-placeholder:after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent 0%,rgba(255,255,255,.45) 45%,transparent 80%);transform:translate(-100%);animation:thumbnail-shimmer 1.2s ease-in-out infinite}.course-thumbnail-loading{position:absolute;inset:0;z-index:2;display:flex;align-items:center;justify-content:center;pointer-events:none}.course-thumbnail-spinner{inline-size:2rem;block-size:2rem;border-radius:50%;border:3px solid rgba(255,255,255,.86);border-top-color:var(--color-primary);animation:thumbnail-spin .75s linear infinite;box-shadow:var(--shadow-sm)}@keyframes thumbnail-spin{to{transform:rotate(360deg)}}@keyframes thumbnail-shimmer{to{transform:translate(100%)}}.course-content{flex:1;display:flex;flex-direction:column}.course-title{font-size:1.25rem;font-weight:700;margin:0 0 var(--space-2);line-height:1.3;color:var(--text-heading)}.course-meta{font-size:.875rem;color:var(--text-muted);margin-bottom:var(--space-4)}.downloaded-badge{display:inline-block;margin-left:var(--space-2);font-size:.8rem;font-weight:600;color:var(--color-success)}.course-completion{margin:var(--space-1) 0 var(--space-2)}.course-actions{margin-top:auto;display:flex;gap:var(--space-2)}.download-status{padding:var(--space-2) 0}.download-btn{background-color:var(--color-primary)!important;color:var(--text-inverted)!important;border-radius:var(--radius-sm)!important;inline-size:2.75rem;block-size:2.75rem;min-inline-size:2.75rem;font-size:1.1rem}.download-btn:hover{background-color:var(--color-primary-dark)!important;transform:scale(1.05)}.cancel-download-btn{border-color:var(--color-accent)!important;color:var(--color-accent)!important;font-weight:600}.guest-banner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3);background:var(--color-primary-light);border:1px solid var(--color-primary);border-radius:var(--radius-sm);padding:var(--space-3) var(--space-4);margin-bottom:var(--space-4);font-size:.875rem;color:var(--text-heading);font-weight:500}.guest-banner-cta{background:var(--color-primary);color:var(--text-inverted);border:none;border-radius:var(--radius-sm);padding:var(--space-1) var(--space-4);font-size:.8rem;font-weight:600;cursor:pointer;white-space:nowrap}.guest-banner-cta:hover{background:var(--color-primary-dark)}.category-tabs{display:flex;gap:0;overflow-x:auto;padding-bottom:0;margin-bottom:var(--space-4);border-bottom:1px solid var(--border-subtle);scrollbar-width:none;-ms-overflow-style:none}.category-tabs::-webkit-scrollbar{display:none}.category-tab{flex-shrink:0;padding:.7rem var(--space-4);border:0;border-bottom:3px solid transparent;border-radius:0;background:transparent;color:var(--text-muted);font-size:.85rem;font-weight:500;cursor:pointer;transition:color .15s,border-color .15s;white-space:nowrap}.category-tab:hover{border-bottom-color:var(--color-primary);color:var(--color-primary)}.category-tab--active{background:transparent;border-color:var(--color-primary);color:var(--text-heading)}.course-card--locked{opacity:.65;cursor:pointer}.course-card--locked:hover{opacity:.8}.course-image{position:relative}.course-locked-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#00000059;border-radius:var(--radius-md);color:#fff;z-index:3}.access-badge{position:absolute;top:var(--space-2);right:var(--space-2);padding:2px var(--space-2);border-radius:var(--radius-sm);font-size:.72rem;font-weight:700;letter-spacing:0;text-transform:uppercase;pointer-events:none;z-index:4}.access-badge--open{background:var(--color-primary);color:var(--text-inverted)}.course-category{font-size:.8rem;color:var(--text-muted)}.modal-overlay{position:fixed;inset:0;background:#0000008c;display:flex;align-items:flex-end;justify-content:center;z-index:1000;padding:var(--space-4);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}@media(min-width:30rem){.modal-overlay{align-items:center}}.modal-card{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--space-6);width:100%;max-width:26rem;box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:var(--space-4);animation:modal-slide-up .2s ease}@keyframes modal-slide-up{0%{transform:translateY(1rem);opacity:0}to{transform:translateY(0);opacity:1}}.modal-icon{color:var(--text-muted);display:flex;justify-content:center}.modal-title{font-size:1.25rem;font-weight:700;margin:0;text-align:center}.modal-body{color:var(--text-muted);font-size:.9rem;text-align:center;line-height:1.5;margin:0}.login-guest-link{display:block;width:100%;margin-top:var(--space-3);padding:var(--space-3);background:none;border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-muted);font-size:.875rem;cursor:pointer;transition:border-color .15s,color .15s}.login-guest-link:hover{border-color:var(--color-primary);color:var(--color-primary)}@media(max-width:43.75rem){.dashboard-container{inline-size:min(100%,92.5rem);padding-top:var(--space-3);padding-right:calc(var(--space-3) + env(safe-area-inset-right));padding-bottom:4.5rem;padding-left:calc(var(--space-3) + env(safe-area-inset-left))}.hero-section{margin-bottom:var(--space-6);padding:var(--space-4)}.hero-content h2{font-size:1.6rem}.courses-grid{grid-template-columns:minmax(0,1fr);gap:var(--space-4)}.course-card{padding:var(--space-3)}.course-image{min-height:8.25rem;height:8.25rem}.course-title{font-size:1.15rem;line-height:1.35}}.login-page{min-height:100vh;min-height:100dvh;display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,#ffffffeb,#f2f4f6eb),linear-gradient(135deg,#f2f4f6,#dfe3e6);padding:24px 16px;overflow-y:auto;box-sizing:border-box}.login-container{width:100%;max-width:380px;display:flex;flex-direction:column;align-items:center;gap:32px}.login-brand{text-align:center}.login-logo{display:block;height:80px;width:auto;max-width:100%;margin:0 auto 14px;transform:translate(8px);filter:drop-shadow(0 2px 5px rgba(0,0,0,.16))}.login-brand h1{font-family:Open Sans,system-ui,sans-serif;font-size:1.5rem;font-weight:700;color:#4e585d;margin:0;letter-spacing:0;line-height:1.1;white-space:nowrap}.login-tagline{font-size:1rem;color:#7b8084;margin:4px 0 0;font-weight:500;letter-spacing:0;text-transform:uppercase}.login-card{width:100%;background:#fff;border-radius:4px;padding:32px 24px;border-top:4px solid #f9bf3b;box-shadow:0 2px 5px #00000029;display:flex;flex-direction:column;align-items:center;gap:20px}.login-welcome{font-size:1rem;color:#555;margin:0;text-align:center}.login-trouble-link{background:none;border:none;color:#7b8084;font-size:.8rem;cursor:pointer;padding:4px;text-decoration:underline;text-underline-offset:3px;transition:color .2s}.login-trouble-link:hover{color:#eba600}.manual-section{width:100%;display:flex;flex-direction:column;gap:12px;padding-top:12px;border-top:1px solid #e2e8f0}.manual-input{width:100%;padding:10px 14px;border:1px solid #e2e8f0;border-radius:2px;background:#f8f9fa;font-size:.9rem;color:#1a202c;box-sizing:border-box}.manual-input:focus{outline:2px solid #f9bf3b;border-color:transparent}.manual-input::placeholder{color:#a0aec0}.login-footer{font-size:.75rem;color:#7b8084;text-align:center;margin:0}