:root{--primary: #1D4ED8;--primary-hover: #1E40AF;--primary-active: #1E3A8A;--primary-light: #EFF6FF;--primary-50: #EFF6FF;--primary-100: #DBEAFE;--primary-200: #BFDBFE;--primary-600: #2563EB;--primary-700: #1D4ED8;--primary-ring: rgba(29, 78, 216, .2);--navy-950: #090D16;--navy-900: #0F172A;--navy-850: #141E33;--navy-800: #1E293B;--navy-700: #334155;--navy-600: #475569;--slate-50: #F8FAFC;--slate-100: #F1F5F9;--slate-200: #E2E8F0;--slate-300: #CBD5E1;--slate-400: #94A3B8;--slate-500: #64748B;--slate-600: #475569;--slate-700: #334155;--slate-800: #1E293B;--slate-900: #0F172A;--bg-main: #F8FAFC;--bg-card: #FFFFFF;--bg-subtle: #F1F5F9;--bg-dark: #0F172A;--bg-dark-surface: #1E293B;--bg-dark-border: #334155;--text-main: #0F172A;--text-muted: #526177;--text-light: #8292A6;--text-white: #FFFFFF;--teal-50: #F0FDF4;--teal-100: #DCFCE7;--teal-500: #16A34A;--teal-600: #15803D;--teal-700: #166534;--success: #15803D;--success-hover: #166534;--success-light: #F0FDF4;--success-border: #BBF7D0;--success-text: #14532D;--warning: #B45309;--warning-hover: #92400E;--warning-light: #FFFBEB;--warning-border: #FDE68A;--warning-text: #78350F;--danger: #DC2626;--danger-hover: #B91C1C;--danger-light: #FEF2F2;--danger-border: #FECACA;--danger-text: #991B1B;--info: #2563EB;--info-light: #EFF6FF;--info-border: #BFDBFE;--info-text: #1E40AF;--accent-purple: #7C3AED;--accent-purple-light: #F5F3FF;--accent-purple-border: #DDD6FE;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--text-xs: .75rem;--text-sm: .875rem;--text-base: .9375rem;--text-lg: 1.0625rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--leading-tight: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.6;--border-color: #E2E8F0;--border-subtle: #F1F5F9;--border-strong: #CBD5E1;--radius-xs: 3px;--radius-sm: 5px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 12px;--radius-2xl: 14px;--radius-full: 9999px;--shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, .04);--shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, .06), 0 1px 2px -1px rgba(15, 23, 42, .03);--shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .06), 0 2px 4px -2px rgba(15, 23, 42, .03);--shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, .07), 0 4px 6px -4px rgba(15, 23, 42, .02);--shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, .08), 0 8px 10px -6px rgba(15, 23, 42, .02);--shadow-inner: inset 0 1px 2px 0 rgba(0, 0, 0, .04);--transition-fast: .12s cubic-bezier(.4, 0, .2, 1);--transition-normal: .18s cubic-bezier(.4, 0, .2, 1);--transition-slow: .24s cubic-bezier(.4, 0, .2, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;line-height:var(--leading-normal);-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--bg-main);color:var(--text-main);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}a{color:inherit;text-decoration:none}img,svg{display:block;max-width:100%}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}html.high-contrast-mode{filter:contrast(125%)}html.high-contrast-mode body{--border-color: #94A3B8;--border-strong: #475569}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}::-webkit-scrollbar{width:7px;height:7px}::-webkit-scrollbar-track{background:var(--slate-100)}::-webkit-scrollbar-thumb{background:var(--slate-300);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--slate-400)}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes pulseSubtle{0%,to{opacity:1}50%{opacity:.5}}@keyframes recordingPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.35;transform:scale(.92)}}.animate-fade-in{animation:fadeIn var(--transition-normal) forwards}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:var(--text-sm);line-height:1;padding:10px 18px;border-radius:var(--radius-md);border:1px solid transparent;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;-webkit-user-select:none;user-select:none;min-height:40px}.btn:disabled{opacity:.55;cursor:not-allowed;pointer-events:none}.btn-primary{background-color:var(--primary);color:#fff;border-color:var(--primary-700);box-shadow:var(--shadow-xs)}.btn-primary:hover:not(:disabled){background-color:var(--primary-hover);box-shadow:var(--shadow-sm)}.btn-primary:active:not(:disabled){background-color:var(--primary-active)}.btn-secondary{background-color:#fff;color:var(--navy-900);border-color:var(--border-strong);box-shadow:var(--shadow-xs)}.btn-secondary:hover:not(:disabled){background-color:var(--slate-50);border-color:var(--slate-400);color:var(--navy-950)}.btn-secondary:active:not(:disabled){background-color:var(--slate-100)}.btn-teal{background-color:var(--teal-600);color:#fff;border-color:var(--teal-700);box-shadow:var(--shadow-xs)}.btn-teal:hover:not(:disabled){background-color:var(--teal-700);box-shadow:var(--shadow-sm)}.btn-ghost{background-color:transparent;color:var(--text-muted)}.btn-ghost:hover:not(:disabled){background-color:var(--slate-100);color:var(--text-main)}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background-color:var(--danger-hover)}.btn-sm{padding:6px 12px;font-size:var(--text-xs);min-height:32px;border-radius:var(--radius-sm)}.btn-lg{padding:12px 22px;font-size:var(--text-base);min-height:44px;border-radius:var(--radius-md)}.form-group{display:flex;flex-direction:column;gap:6px;width:100%}.form-label{display:block;font-size:var(--text-sm);font-weight:600;color:var(--navy-900);letter-spacing:-.01em}.input-field{width:100%;height:40px;padding:0 12px;background-color:#fff;border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-main);font-size:var(--text-sm);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);outline:none}.input-field::placeholder{color:var(--slate-400)}.input-field:hover:not(:disabled){border-color:var(--border-strong)}.input-field:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-ring)}.input-field:disabled{background-color:var(--slate-100);cursor:not-allowed;opacity:.7}select.input-field{cursor:pointer}textarea.input-field{height:auto;min-height:90px;padding:10px 14px;resize:vertical}.card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px 24px;box-shadow:var(--shadow-xs);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.card-hover:hover{border-color:var(--slate-300);box-shadow:var(--shadow-sm)}.card-flat{background-color:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:20px}.stat-card{background-color:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:18px 20px;box-shadow:var(--shadow-xs);display:flex;align-items:center;gap:16px;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.stat-card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-sm)}.stat-icon-wrapper{width:44px;height:44px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;flex-shrink:0}.badge{display:inline-flex;align-items:center;gap:5px;font-size:var(--text-xs);font-weight:700;padding:3px 10px;border-radius:var(--radius-full);letter-spacing:.03em;white-space:nowrap}.badge-primary{background-color:var(--primary-light);color:var(--primary);border:1px solid var(--primary-200)}.badge-teal{background-color:var(--teal-50);color:var(--teal-700);border:1px solid var(--teal-100)}.badge-verified{background-color:var(--success-light);color:var(--success-text);border:1px solid var(--success-border)}.badge-pending{background-color:var(--warning-light);color:var(--warning-text);border:1px solid var(--warning-border)}.badge-danger{background-color:var(--danger-light);color:var(--danger-text);border:1px solid var(--danger-border)}.badge-neutral{background-color:var(--slate-100);color:var(--slate-600);border:1px solid var(--slate-200)}.table-responsive{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius-lg);border:1px solid var(--border-color)}.data-table{width:100%;border-collapse:collapse;text-align:left;font-size:var(--text-sm);background-color:#fff}.data-table th{background-color:var(--slate-50);color:var(--slate-500);font-weight:700;font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.05em;padding:12px 18px;border-bottom:1px solid var(--border-color);white-space:nowrap}.data-table td{padding:16px 18px;border-bottom:1px solid var(--border-subtle);color:var(--navy-800);vertical-align:middle}.data-table tr:last-child td{border-bottom:none}.data-table tr:hover td{background-color:var(--slate-50)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:56px 24px;background-color:#fff;border:1px dashed var(--border-strong);border-radius:var(--radius-xl)}.empty-state-icon{width:64px;height:64px;border-radius:var(--radius-2xl);background-color:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}.empty-state-title{font-size:var(--text-lg);font-weight:700;color:var(--navy-900);margin-bottom:6px}.empty-state-desc{font-size:var(--text-sm);color:var(--text-muted);max-width:420px;margin-bottom:20px;line-height:var(--leading-relaxed)}.skeleton{background:linear-gradient(90deg,#f1f5f9 25%,#e2e8f0,#f1f5f9 75%);background-size:200% 100%;animation:shimmer 1.5s infinite;border-radius:var(--radius-md)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.dashboard-layout{display:flex;min-height:100vh;width:100%;background-color:var(--bg-main);position:relative}.app-sidebar{width:260px;min-height:100vh;background-color:var(--navy-900);color:#fff;padding:24px 18px;display:flex;flex-direction:column;justify-content:space-between;border-right:1px solid var(--navy-800);flex-shrink:0;position:sticky;top:0;height:100vh;overflow-y:auto}.dashboard-main{flex:1;padding:32px 40px;overflow-y:auto;min-width:0}.app-header{position:sticky;top:0;z-index:100;background-color:#fffffff5;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-xs)}@media(max-width:1024px){.dashboard-main{padding:24px}}@media(max-width:768px){.dashboard-layout{flex-direction:column}.app-sidebar{width:100%!important;height:auto!important;min-height:auto!important;position:static!important;padding:14px 16px!important;border-right:none!important;border-bottom:1px solid var(--navy-800)!important}.app-sidebar-nav-container{display:flex!important;flex-wrap:wrap!important;gap:8px!important}.app-sidebar-nav-container button{width:auto!important;padding:8px 12px!important;font-size:var(--text-xs)!important;margin-bottom:0!important}.dashboard-main{padding:18px 16px}.card{padding:18px;border-radius:var(--radius-lg)}.desktop-nav{display:none!important}.mobile-nav-toggle{display:flex!important}.btn{min-height:44px}.input-field{min-height:44px;font-size:16px!important}.app-footer-container{flex-direction:column!important;align-items:flex-start!important;gap:16px!important}.app-footer-links{width:100%;justify-content:space-between;gap:12px!important}}.landing-hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);gap:48px;align-items:center}.hero-title{font-size:3.2rem;font-weight:800;color:var(--navy-950);line-height:1.08;letter-spacing:-.035em;margin-bottom:20px}.hero-search-form{display:flex;gap:12px;max-width:610px;margin-bottom:24px}.course-detail-header-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,.6fr);gap:32px;align-items:center}.course-detail-main-grid{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(300px,.6fr);gap:32px;align-items:start}.live-studio-viewport{flex:1;display:flex;overflow:hidden}@media(max-width:960px){.landing-hero-grid{grid-template-columns:1fr!important;gap:32px!important}.hero-title{font-size:2.3rem!important;line-height:1.18!important}.course-detail-header-grid,.course-detail-main-grid{grid-template-columns:1fr!important;gap:24px!important}}@media(max-width:768px){.live-studio-viewport{flex-direction:column!important}.live-studio-viewport aside{width:100%!important;height:280px!important;border-left:none!important;border-top:1px solid rgba(255,255,255,.1)!important}}@media(max-width:580px){.hero-search-form{flex-direction:column!important}.hero-search-form button{width:100%!important}}.app-footer{margin-top:auto;background-color:var(--navy-950);border-top:1px solid var(--navy-800);color:var(--slate-400);padding:22px 0;font-size:.85rem;position:relative;z-index:10}.app-footer-container{max-width:1240px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}.app-footer-brand{display:flex;align-items:center;gap:12px}.app-footer-links{display:flex;align-items:center;flex-wrap:wrap;gap:20px}.app-footer-link{color:var(--slate-400);background:none;border:none;padding:4px 6px;font-size:.84rem;font-weight:500;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px;border-radius:var(--radius-sm);transition:color .15s ease,background-color .15s ease}.app-footer-link:hover{color:#fff}.app-footer-link:focus-visible{outline:2px solid var(--primary);outline-offset:2px}.app-footer-scroll-top{display:inline-flex;align-items:center;gap:6px;background-color:var(--navy-900);border:1px solid var(--navy-800);color:var(--slate-300);padding:6px 12px;border-radius:var(--radius-sm);font-size:.78rem;font-weight:600;cursor:pointer;transition:all .15s ease}.app-footer-scroll-top:hover{background-color:var(--primary);border-color:var(--primary);color:#fff}.app-footer-scroll-top:focus-visible{outline:2px solid var(--primary);outline-offset:2px}