.loading-spinner-container{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;background-color:var(--bg-primary)}.loading-spinner{display:inline-block;position:relative;width:80px;height:80px}.spinner-ring{box-sizing:border-box;display:block;position:absolute;width:64px;height:64px;margin:8px;border:4px solid var(--accent-blue-light);border-radius:50%;animation:spinner-ring 1.2s cubic-bezier(.5,0,.5,1) infinite;border-color:var(--accent-blue-light) transparent transparent transparent}.spinner-ring:nth-child(1){animation-delay:-.45s}.spinner-ring:nth-child(2){animation-delay:-.3s}.spinner-ring:nth-child(3){animation-delay:-.15s}@keyframes spinner-ring{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-text{margin-top:var(--spacing-lg);color:var(--text-secondary);font-size:var(--font-size-md)}:root{--bg-primary: #1D1D1F;--bg-secondary: #29292B;--bg-tertiary: #3C3C3E;--bg-elevated: #4C4C4E;--text-primary: #F2F2F7;--text-secondary: #A0A0A5;--text-white: #FFFFFF;--accent-blue: #06C;--accent-blue-hover: #0096FF;--accent-blue-light: #7db5f1;--accent-red: #FF3B30;--chat-message-user-bg: #2C2C2E;--chat-message-ai-bg: transparent;--color-error: #D32F2F;--color-error-hover: #B71C1C;--color-success: #4CAF50;--color-warning: #FFA726;--bg-overlay-light: rgba(255, 255, 255, .1);--bg-overlay-medium: rgba(255, 255, 255, .2);--bg-overlay-strong: rgba(255, 255, 255, .3);--bg-overlay-white: rgba(255, 255, 255, .9);--bg-overlay-black: rgba(0, 0, 0, .8);--badge-blue-bg: rgba(59, 130, 246, .1);--badge-success-bg: rgba(76, 175, 80, .2);--badge-warning-bg: rgba(255, 167, 38, .2);--badge-error-bg: rgba(211, 47, 47, .2);--badge-info-bg: rgba(125, 181, 241, .2);--video-overlay-bg-light: rgba(255, 255, 255, .1);--video-overlay-bg-medium: rgba(255, 255, 255, .2);--video-subtitle-shadow: rgba(0, 0, 0, .9);--video-off-btn-bg: rgba(255, 100, 100, .3);--video-off-btn-border: rgba(255, 100, 100, .5);--border-color: #29292B;--border-radius: 12px;--border-radius-sm: 6px;--border-radius-lg: 15px;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .2);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 12px 24px rgba(0, 0, 0, .2);--shadow-inset: inset 0 2px 4px rgba(0, 0, 0, .3);--shadow-blue-sm: 0 4px 12px rgba(0, 102, 204, .4);--shadow-blue-md: 0 8px 24px rgba(0, 102, 204, .3);--shadow-blue-lg: 0 6px 20px rgba(0, 102, 204, .5);--spacing-2xs: 4px;--spacing-3xs: 6px;--spacing-xxs: 8px;--spacing-xs: 5px;--spacing-sm: 10px;--spacing-xsm: 12px;--spacing-md: 15px;--spacing-lg: 20px;--spacing-xl: 25px;--spacing-2xl: 30px;--spacing-3xl: 40px;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-size-2xs: 10px;--font-size-xs: 12px;--font-size-sm: 14px;--font-size-md: 16px;--font-size-lg: 18px;--font-size-logo: 18px;--font-size-xl: 24px;--font-size-2xl: 32px;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--transition-fast: .2s ease;--transition-normal: .3s ease;--touch-target-min: 44px;--z-dropdown: 1000;--z-sticky: 1020;--z-fixed: 1030;--z-modal: 1050;--breakpoint-sm: 640px;--breakpoint-md: 768px;--breakpoint-lg: 1024px;--breakpoint-xl: 1280px;--video-bg-primary: #0A0A0A;--video-bg-secondary: #29292B;--video-bg-tertiary: #2a2a2a;--video-border: #48484a;--video-accent-primary: #0066cc;--video-accent-secondary: #FFC107;--video-script-padding: .75rem;--video-script-padding-top: .75rem;--video-control-padding-v: .75rem;--video-control-padding-h: 1rem;--video-card-gap-top: 1rem;--video-card-gap: 1rem;--video-card-padding: 1rem;--video-subtitle-gap: .5rem;--video-timestamp-gap: .75rem;--video-control-btn-padding-v: .35rem;--video-control-btn-padding-h: .6rem;--video-action-btn-padding-v: .25rem;--video-action-btn-padding-h: .5rem;--video-subtitle-font-size: .9rem;--video-subtitle-line-height: 1.2;--video-portrait-bg-primary: #0A0A0A;--video-portrait-bg-secondary: #29292B;--video-portrait-bg-tertiary: #2a2a2a;--video-portrait-text-primary: #F2F2F7;--video-portrait-text-secondary: #A0A0A5;--video-portrait-accent-primary: #0066cc;--video-portrait-accent-secondary: #FFC107;--video-portrait-border: #48484a;--video-portrait-script-padding: .75rem;--video-portrait-card-gap: 1rem;--video-portrait-card-padding: 1rem;--video-portrait-subtitle-gap: .5rem;--video-portrait-header-gap: .75rem;--video-portrait-font-size: .9rem;--video-portrait-line-height: 1.2;--video-portrait-timestamp-size: .875rem;--video-landscape-overlay-bottom: 60px;--video-landscape-overlay-max-width: 550px;--video-landscape-subtitle-padding: .25rem .6rem;--video-landscape-subtitle-gap: .5rem;--video-landscape-subtitle-bg: rgba(0, 0, 0, .6);--video-landscape-subtitle-radius: 6px;--video-landscape-panel-width: 80%;--video-landscape-panel-max-width: 800px;--video-landscape-panel-max-height: 85vh;--video-landscape-panel-bg: rgba(0, 0, 0, .2);--video-landscape-panel-border: rgba(255, 255, 255, .05);--video-landscape-panel-radius: 12px;--video-landscape-header-padding: .75rem 1rem;--video-landscape-header-bg: rgba(0, 0, 0, .3);--video-landscape-header-border: rgba(255, 255, 255, .1);--video-landscape-item-padding: .5rem .75rem;--video-landscape-item-margin: .25rem 0;--video-landscape-item-font-size: .9rem;--video-landscape-item-color: rgba(255, 255, 255, .6);--video-landscape-item-color-active: rgba(255, 255, 255, .95);--video-landscape-item-bg-active: rgba(0, 102, 204, .2);--video-landscape-item-border-active: rgba(0, 102, 204, .3);--video-landscape-mini-header-height: 60px;--video-landscape-mini-header-padding: 0 1.5rem;--video-landscape-mini-header-title-size: 1rem;--video-landscape-text-white: #fff;--video-landscape-accent-blue: #0066cc}body{font-family:var(--font-family);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--bg-secondary)}h1,h2,h3,h4,h5,h6{color:var(--text-white);font-weight:var(--font-bold);margin-bottom:var(--spacing-md)}h1{font-size:var(--font-size-2xl)}h2{font-size:var(--font-size-xl)}h3{font-size:var(--font-size-lg)}h4{font-size:var(--font-size-md)}p{margin-bottom:var(--spacing-md);font-size:var(--font-size-sm)}a{color:var(--accent-blue);text-decoration:none;transition:color var(--transition-normal)}a:hover{color:var(--accent-blue-hover)}*:focus-visible{outline:3px solid var(--accent-blue-light);outline-offset:2px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--accent-blue-light);outline-offset:2px}.container{max-width:1200px;margin:0 auto;padding:var(--spacing-lg)}@media(max-width:768px){.container{padding:var(--spacing-md)}}.page-content{padding:var(--spacing-lg);padding-bottom:80px;background-color:var(--bg-primary)}@media(max-width:768px){.page-content{padding:var(--spacing-md);padding-bottom:80px}}.card{background-color:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:var(--spacing-lg);margin-bottom:var(--spacing-md);box-shadow:var(--shadow-sm);transition:all var(--transition-normal)}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn{padding:12px 20px;border-radius:var(--border-radius-sm);font-size:var(--font-size-sm);font-weight:var(--font-medium);cursor:pointer;border:none;transition:all var(--transition-normal);min-height:var(--touch-target-min);display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-family)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--accent-blue);color:var(--text-white);box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){background-color:var(--accent-blue-hover);box-shadow:var(--shadow-md)}.btn-secondary{background-color:var(--bg-tertiary);color:var(--text-primary);box-shadow:var(--shadow-sm)}.btn-secondary:hover:not(:disabled){background-color:var(--bg-elevated);border:1px solid var(--accent-blue-light)}.btn-danger{background-color:var(--color-error);color:var(--text-white);box-shadow:var(--shadow-sm)}.btn-danger:hover:not(:disabled){background-color:var(--color-error-hover);box-shadow:var(--shadow-md)}.btn-sm{padding:8px 16px;font-size:var(--font-size-xs);min-height:36px}.btn-lg{padding:16px 24px;font-size:var(--font-size-md);min-height:52px}input[type=text],input[type=email],input[type=password],textarea,select{width:100%;padding:12px 15px;border:1px solid var(--border-color);border-radius:var(--border-radius-sm);background-color:var(--bg-tertiary);color:var(--text-primary);font-size:var(--font-size-sm);font-family:var(--font-family);box-shadow:var(--shadow-inset);transition:all var(--transition-normal)}input[type=text]:focus,input[type=email]:focus,input[type=password]:focus,textarea:focus,select:focus{outline:none;background-color:var(--bg-elevated);border-color:var(--accent-blue-light);box-shadow:0 0 0 3px #7db5f11a}textarea{resize:vertical;min-height:100px}input::placeholder,textarea::placeholder{color:var(--text-secondary)}.page-header{background-color:var(--bg-primary);padding:12px 20px;height:60px;position:sticky;top:0;z-index:var(--z-sticky);border-bottom:1px solid var(--border-color);display:flex;align-items:center;transform:translateY(0);transition:transform var(--transition-normal)}.page-header.hidden{transform:translateY(-100%)}.page-header .header-content{display:flex;justify-content:space-between;align-items:center;width:100%;height:100%}.page-header .logo{font-size:var(--font-size-logo);font-weight:var(--font-semibold);color:var(--text-white)}.page-header .header-actions{display:flex;gap:10px;align-items:center}.page-header .add-content-btn{width:36px;height:36px;background-color:var(--accent-blue);border:1px solid var(--accent-blue-light);border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--transition-normal)}.page-header .add-content-btn:hover{background-color:var(--accent-blue-hover);transform:scale(1.05)}.page-header .add-content-btn svg{width:20px;height:20px;color:var(--text-white)}.page-header .profile-icon{width:36px;height:36px;border-radius:50%;object-fit:cover}.page-header .profile-icon-placeholder{width:36px;height:36px;border-radius:50%;background-color:var(--bg-tertiary);display:flex;align-items:center;justify-content:center;color:var(--text-white);font-weight:600;font-size:14px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;background-color:var(--bg-secondary);display:flex;justify-content:space-around;align-items:center;height:60px;border-top:1px solid var(--border-color);box-shadow:0 -2px 10px #0000004d;z-index:var(--z-fixed)}.bottom-nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-secondary);font-size:var(--font-size-xs);min-width:var(--touch-target-min);height:var(--touch-target-min);transition:color var(--transition-normal);text-decoration:none}.bottom-nav-item:hover,.bottom-nav-item.active{color:var(--text-white)}.bottom-nav-icon{width:24px;height:24px;margin-bottom:4px}.sidebar-nav{display:none}@media(min-width:769px),(min-width:568px)and (orientation:landscape){.sidebar-nav{display:block;position:fixed;left:0;top:0;bottom:0;width:72px;background-color:var(--bg-primary);border-right:1px solid var(--border-color);z-index:var(--z-sticky);overflow-y:visible;padding:12px 0}.sidebar-nav-content{display:flex;flex-direction:column;padding:0 12px;gap:8px}.sidebar-nav-item{position:relative;display:flex;align-items:center;justify-content:center;width:48px;height:48px;color:var(--text-secondary);text-decoration:none;transition:all var(--transition-normal);border-radius:12px}.sidebar-nav-item:hover{background-color:var(--bg-secondary);color:var(--primary-color)}.sidebar-nav-item.active{background-color:transparent;color:var(--text-white)}.sidebar-nav-icon{width:24px;height:24px;flex-shrink:0}.sidebar-nav-label{position:absolute;left:72px;background-color:var(--bg-elevated);color:var(--text-primary);padding:8px 12px;border-radius:8px;font-size:var(--font-size-sm);white-space:nowrap;opacity:0;pointer-events:none;transition:opacity var(--transition-fast);box-shadow:var(--shadow-md)}.sidebar-nav-item:hover .sidebar-nav-label{opacity:1}.page-with-sidebar{margin-left:72px}}@media(min-width:769px),(min-width:568px)and (orientation:landscape){.bottom-nav{display:none}.page-content{padding-bottom:var(--spacing-lg)}}.video-container{position:relative;width:100%;background-color:#000;border-radius:var(--border-radius);overflow:hidden}.video-player{width:100%;height:auto;display:block}.video-controls{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(to top,rgba(0,0,0,.8),transparent);padding:var(--spacing-md);display:flex;gap:var(--spacing-sm);align-items:center}.video-actions{display:flex;flex-direction:row;align-items:center;gap:10px;margin-top:12px;padding-top:12px;border-top:1px solid var(--border-color)}.video-action-btn{display:flex;align-items:center;gap:6px;background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:6px 10px;border-radius:var(--border-radius-sm);transition:all var(--transition-normal);font-size:var(--font-size-xs)}.video-action-btn:hover{background-color:var(--bg-tertiary);color:var(--text-primary)}.video-action-btn.liked{color:#ff3b30}.video-action-icon{width:20px;height:20px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.section-title{font-size:var(--font-size-lg);font-weight:var(--font-semibold);color:var(--text-white);margin:0}.view-all-link{display:flex;align-items:center;gap:4px;font-size:var(--font-size-sm);color:var(--accent-blue);text-decoration:none;transition:color var(--transition-normal)}.view-all-link:hover{color:var(--accent-blue-hover)}.loading-container{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--spacing-xl);gap:var(--spacing-md)}.loading-spinner{width:40px;height:40px;border:3px solid var(--bg-tertiary);border-top-color:var(--accent-blue-light);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{color:var(--text-secondary);font-size:var(--font-size-sm)}.empty-state{text-align:center;padding:var(--spacing-xl)}.empty-title{color:var(--text-white);font-size:var(--font-size-lg);margin-bottom:var(--spacing-sm);font-weight:var(--font-semibold)}.empty-description{color:var(--text-secondary);font-size:var(--font-size-sm)}.feed-item{background-color:var(--bg-secondary);border-radius:var(--border-radius);padding:var(--spacing-md);margin-bottom:var(--spacing-md)}.feed-header{display:flex;align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.phrase-card{background-color:var(--bg-secondary);border-left:3px solid var(--accent-blue-light);border-radius:var(--border-radius-sm);padding:var(--spacing-md);margin-bottom:var(--spacing-sm)}.phrase-text{color:var(--text-white);font-size:var(--font-size-md);margin-bottom:var(--spacing-xs)}.phrase-translation{color:var(--text-secondary);font-size:var(--font-size-sm)}.progress-bar{width:100%;height:10px;background-color:var(--bg-tertiary);border-radius:5px;overflow:hidden}.progress-bar-fill{height:100%;background-color:var(--accent-blue-light);border-radius:5px;transition:width var(--transition-normal)}.badge{display:inline-flex;align-items:center;padding:4px 12px;background-color:var(--bg-tertiary);color:var(--accent-blue-light);border-radius:16px;font-size:var(--font-size-xs);font-weight:var(--font-medium)}.badge-success{background-color:var(--badge-success-bg);color:var(--color-success)}.badge-warning{background-color:var(--badge-warning-bg);color:var(--color-warning)}.badge-error{background-color:var(--badge-error-bg);color:var(--color-error)}.badge-info{background-color:var(--badge-info-bg);color:var(--accent-blue-light)}.profile-icon{width:40px;height:40px;border-radius:50%;object-fit:cover;border:2px solid var(--border-color)}.profile-icon-lg{width:60px;height:60px}.profile-icon-xl{width:120px;height:120px}.text-center{text-align:center}.text-right{text-align:right}.text-left{text-align:left}.mb-0{margin-bottom:0}.mb-xs{margin-bottom:var(--spacing-xs)}.mb-sm{margin-bottom:var(--spacing-sm)}.mb-md{margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:var(--spacing-lg)}.mb-xl{margin-bottom:var(--spacing-xl)}.mb-2xl{margin-bottom:var(--spacing-2xl)}.mt-xs{margin-top:var(--spacing-xs)}.mt-sm{margin-top:var(--spacing-sm)}.mt-md{margin-top:var(--spacing-md)}.mt-lg{margin-top:var(--spacing-lg)}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-xs{gap:var(--spacing-xs)}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.grid{display:grid}.grid-cols-1{grid-template-columns:repeat(1,1fr)}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}.opacity-0{opacity:0}.opacity-50{opacity:.5}.opacity-60{opacity:.6}.opacity-80{opacity:.8}.opacity-100{opacity:1}.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-none{border:none}.aspect-1-1{aspect-ratio:1 / 1}.aspect-16-9{aspect-ratio:16 / 9}.aspect-4-3{aspect-ratio:4 / 3}.hidden{display:none}.block{display:block}.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}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes slide-up{0%{transform:translate(-50%,20px);opacity:0}to{transform:translate(-50%);opacity:1}}.animate-fade-in{animation:fade-in .3s ease-out}.animate-slide-up{animation:slide-up .3s ease-out}.toast{position:fixed;bottom:80px;left:50%;transform:translate(-50%);padding:12px 24px;border-radius:var(--border-radius);box-shadow:var(--shadow-lg);z-index:var(--z-modal);font-size:var(--font-size-sm);font-weight:var(--font-medium);animation:slide-up .3s ease-out;max-width:90%;text-align:center}.toast.success{background-color:var(--color-success);color:var(--text-white)}.toast.error{background-color:var(--color-error);color:var(--text-white)}.toast.warning{background-color:var(--color-warning);color:var(--text-white)}@media(min-width:769px){.toast{bottom:var(--spacing-lg)}}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#000000b3;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:var(--z-modal);gap:var(--spacing-md)}.loading-message{color:var(--text-white);font-size:var(--font-size-md);font-weight:var(--font-medium);text-align:center;padding:0 var(--spacing-md)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#000000b3;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);padding:var(--spacing-lg)}.modal-content{background-color:var(--bg-secondary);border-radius:var(--border-radius);padding:var(--spacing-xl);max-width:500px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-lg)}.modal-title{font-size:var(--font-size-xl);color:var(--text-white);font-weight:var(--font-bold)}.modal-close-btn{width:32px;height:32px;border-radius:50%;background-color:var(--bg-tertiary);border:none;color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal)}.modal-close-btn:hover{background-color:var(--bg-elevated);color:var(--text-white)}.modal-body{color:var(--text-primary)}.modal-footer{display:flex;justify-content:flex-end;gap:var(--spacing-sm);margin-top:var(--spacing-lg);padding-top:var(--spacing-lg);border-top:1px solid var(--border-color)}.editor-container{background-color:var(--bg-secondary);border-radius:var(--border-radius);border:1px solid var(--border-color);overflow:hidden}.editor-toolbar{background-color:var(--bg-tertiary);border-bottom:1px solid var(--border-color);padding:var(--spacing-sm);display:flex;gap:var(--spacing-xs);flex-wrap:wrap}.editor-tool-btn{width:32px;height:32px;border-radius:var(--border-radius-sm);background-color:transparent;border:none;color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal)}.editor-tool-btn:hover{background-color:var(--bg-elevated);color:var(--text-white)}.editor-tool-btn.active{background-color:var(--accent-blue);color:var(--text-white)}.editor-content{padding:var(--spacing-lg);min-height:200px;color:var(--text-primary);font-size:var(--font-size-md);line-height:1.6}.editor-content:focus{outline:none}.stats-card{background-color:var(--bg-secondary);border-radius:var(--border-radius);padding:var(--spacing-md);text-align:center;border:1px solid var(--border-color)}.stats-value{font-size:var(--font-size-2xl);font-weight:var(--font-bold);color:var(--text-white);margin-bottom:var(--spacing-xs)}.stats-label{font-size:var(--font-size-xs);color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.stats-overview{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-md);margin-bottom:var(--spacing-lg)}.achievement-badge{background-color:var(--bg-secondary);border-radius:var(--border-radius);padding:var(--spacing-md);margin-bottom:var(--spacing-sm);display:flex;align-items:center;gap:var(--spacing-md);border:1px solid var(--border-color);transition:all 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