:root{--color-bg-primary: #121212;--color-bg-secondary: #1E1E1E;--color-bg-tertiary: #27272A;--color-bg-gradient: linear-gradient(135deg, #0F0F0F 0%, #18181B 100%);--color-text-primary: #EDEDED;--color-text-secondary: #A1A1AA;--color-text-tertiary: #71717A;--color-text-inverse: #000000;--color-accent: #FFFFFF;--color-accent-hover: #E5E5E5;--color-accent-light: rgba(255, 255, 255, .1);--color-accent-subtle: rgba(255, 255, 255, .2);--color-success: #34D399;--color-warning: #FBBF24;--color-error: #F87171;--color-border: #3F3F46;--color-border-light: #27272A;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5);--shadow-card: 0 1px 3px rgba(0, 0, 0, .3), 0 4px 12px rgba(0, 0, 0, .2);--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-relaxed: 1.625;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease;--header-height: 64px;--input-panel-width: 380px}.light-mode{--color-bg-primary: #FAFAFA;--color-bg-secondary: #FFFFFF;--color-bg-tertiary: #F5F5F4;--color-bg-gradient: linear-gradient(135deg, #FAFAFA 0%, #F0F0EE 50%, #E8E8E6 100%);--color-text-primary: #171717;--color-text-secondary: #525252;--color-text-tertiary: #A3A3A3;--color-text-inverse: #FFFFFF;--color-accent: #4F46E5;--color-accent-hover: #4338CA;--color-accent-light: #EEF2FF;--color-accent-subtle: #E0E7FF;--color-success: #10B981;--color-warning: #F59E0B;--color-error: #EF4444;--color-border: #E5E5E5;--color-border-light: #F0F0F0;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 12px rgba(0, 0, 0, .06);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .08);--shadow-card: 0 1px 3px rgba(0, 0, 0, .04), 0 4px 12px rgba(0, 0, 0, .03)}.light-mode .btn-primary{color:#fff}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);font-size:var(--font-size-base);font-weight:var(--font-weight-normal);line-height:var(--line-height-normal);color:var(--color-text-primary);background:var(--color-bg-gradient);min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight);color:var(--color-text-primary)}h1{font-size:var(--font-size-3xl)}h2{font-size:var(--font-size-xl)}h3{font-size:var(--font-size-lg)}p{color:var(--color-text-secondary)}.app-container{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);padding:0 var(--space-6);background:var(--color-bg-secondary);border-bottom:1px solid var(--color-border-light);position:sticky;top:0;z-index:100}.logo{display:flex;align-items:center;gap:var(--space-3)}.logo-icon{width:28px;height:28px;color:var(--color-accent)}.logo-text{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);letter-spacing:-.02em}.header-actions{display:flex;align-items:center;gap:var(--space-2)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);font-family:var(--font-family);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);line-height:1;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);white-space:nowrap}.btn svg{width:16px;height:16px;flex-shrink:0}.btn-primary{background:var(--color-accent);color:#000;padding:var(--space-3) var(--space-5)}.btn-primary:hover{background:var(--color-accent-hover);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--color-bg-secondary);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-bg-tertiary);border-color:var(--color-text-tertiary)}.btn-ghost{background:transparent;color:var(--color-text-secondary);padding:var(--space-2) var(--space-3)}.btn-ghost:hover{background:var(--color-bg-tertiary);color:var(--color-text-primary)}.btn-full{width:100%}.btn-icon{padding:var(--space-2);border-radius:var(--radius-sm)}.toggle-btn.active{background:var(--color-accent-light);color:var(--color-accent)}.centered-layout{display:flex;flex-direction:column;align-items:center;width:100%;max-width:900px;margin:0 auto;padding:var(--space-8)}.header-right{position:relative}.settings-popover{position:absolute;top:100%;right:0;margin-top:var(--space-2);width:300px;background:var(--color-bg-secondary);padding:var(--space-4);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);border:1px solid var(--color-border);z-index:200;animation:fadeIn var(--transition-fast)}.settings-popover.hidden{display:none}.hint{font-size:var(--font-size-xs);color:var(--color-text-tertiary);margin-top:var(--space-2)}.hero-section{width:100%;max-width:700px;display:flex;flex-direction:column;align-items:center;transition:all .6s cubic-bezier(.16,1,.3,1);margin-top:20vh}.hero-section.expanded{margin-top:0}.hero-title{font-size:var(--font-size-3xl);text-align:center;margin-bottom:var(--space-8);background:linear-gradient(135deg,var(--color-text-primary) 0%,var(--color-text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;transition:all .4s ease}.hero-section.expanded .hero-title{opacity:0;height:0;margin:0;overflow:hidden}.main-input-wrapper{position:relative;width:100%;margin-bottom:var(--space-6)}.main-topic-input{width:100%;padding:var(--space-5) var(--space-6);padding-right:60px;font-size:var(--font-size-lg);border:1px solid var(--color-border);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);transition:all var(--transition-base);background:var(--color-bg-secondary);color:var(--color-text-primary)}.main-topic-input:focus{box-shadow:var(--shadow-lg),0 0 0 2px var(--color-accent-subtle);border-color:var(--color-accent)}.btn-submit-icon{position:absolute;right:var(--space-3);top:50%;transform:translateY(-50%);background:var(--color-accent);color:#000;border:none;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform var(--transition-fast)}.btn-submit-icon:hover{transform:translateY(-50%) scale(1.05)}.btn-submit-icon svg{width:20px;height:20px}.config-panel{width:100%;background:var(--color-bg-secondary);border-radius:var(--radius-xl);padding:var(--space-6);border:1px solid var(--color-border-light);box-shadow:var(--shadow-card);overflow:hidden;max-height:1000px;opacity:1;transform:translateY(0);transition:all .5s cubic-bezier(.16,1,.3,1)}.config-panel.hidden{max-height:0;opacity:0;padding:0;border:none;transform:translateY(-20px);pointer-events:none}.config-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-5);margin-bottom:var(--space-6)}.config-item{display:flex;flex-direction:column;gap:var(--space-2)}.config-item.full-width{grid-column:span 2}.config-item label{font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text-secondary)}.config-item input[type=text],.config-item select,.config-item textarea{padding:var(--space-3);border-radius:var(--radius-md);border:1px solid var(--color-border);font-size:var(--font-size-sm);font-family:var(--font-family);background:var(--color-bg-tertiary);color:var(--color-text-primary);width:100%;resize:vertical}.output-panel{padding:var(--space-8);overflow-y:auto;display:flex;flex-direction:column}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:var(--space-16);animation:fadeIn var(--transition-slow)}.empty-state-icon{width:80px;height:80px;display:flex;align-items:center;justify-content:center;background:var(--color-bg-secondary);border-radius:var(--radius-xl);margin-bottom:var(--space-6);box-shadow:var(--shadow-card)}.empty-state-icon svg{width:40px;height:40px;color:var(--color-text-tertiary)}.empty-state h3{font-size:var(--font-size-xl);margin-bottom:var(--space-2)}.empty-state p{max-width:320px;font-size:var(--font-size-sm)}.script-output{flex:1;display:flex;flex-direction:column;gap:var(--space-6);animation:fadeIn var(--transition-slow)}.script-output.hidden{display:none}.output-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--space-4);flex-wrap:wrap}.output-meta h2{margin-bottom:var(--space-2)}.output-tags{display:flex;gap:var(--space-2);flex-wrap:wrap}.tag{font-size:var(--font-size-xs);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);background:var(--color-bg-tertiary);padding:4px 10px;border-radius:var(--radius-full)}.output-controls{display:flex;gap:var(--space-2)}.script-sections{display:flex;flex-direction:column;gap:var(--space-4)}.script-section{background:var(--color-bg-secondary);border-radius:var(--radius-lg);padding:var(--space-5);box-shadow:var(--shadow-card);border:1px solid var(--color-border-light);animation:slideUp var(--transition-slow);animation-fill-mode:both}.script-section:nth-child(1){animation-delay:0ms}.script-section:nth-child(2){animation-delay:50ms}.script-section:nth-child(3){animation-delay:.1s}.script-section:nth-child(4){animation-delay:.15s}.script-section:nth-child(5){animation-delay:.2s}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-3)}.section-title{display:flex;align-items:center;gap:var(--space-3)}.section-title h3{font-size:var(--font-size-base);font-weight:var(--font-weight-semibold)}.section-time{font-size:var(--font-size-xs);color:var(--color-text-tertiary);background:var(--color-bg-tertiary);padding:2px 8px;border-radius:var(--radius-full)}.section-content{font-size:var(--font-size-sm);line-height:var(--line-height-relaxed);color:var(--color-text-secondary)}.section-content p{margin-bottom:var(--space-3)}.section-content p:last-child{margin-bottom:0}.speaker-notes,.slide-bullets{margin-top:var(--space-4);padding-top:var(--space-4);border-top:1px dashed var(--color-border);display:none}.speaker-notes.visible,.slide-bullets.visible{display:block;animation:fadeIn var(--transition-base)}.speaker-notes h4,.slide-bullets h4{font-size:var(--font-size-xs);font-weight:var(--font-weight-semibold);color:var(--color-text-tertiary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-2)}.slide-bullets ul{list-style:none;display:flex;flex-direction:column;gap:var(--space-1)}.slide-bullets li{font-size:var(--font-size-sm);color:var(--color-text-secondary);padding-left:var(--space-4);position:relative}.slide-bullets li:before{content:"•";position:absolute;left:0;color:var(--color-accent)}.output-footer{display:flex;align-items:center;justify-content:space-between;padding-top:var(--space-6);border-top:1px solid var(--color-border-light);margin-top:auto}.total-time{display:flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-sm);color:var(--color-text-secondary)}.total-time svg{width:18px;height:18px;color:var(--color-text-tertiary)}.hidden{display:none!important}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.spin{animation:spin 1s linear infinite}@media(max-width:1024px){:root{--input-panel-width: 340px}.output-panel{padding:var(--space-6)}}@media(max-width:768px){.main-content{grid-template-columns:1fr;grid-template-rows:auto 1fr}.input-panel{border-right:none;border-bottom:1px solid var(--color-border-light);max-height:50vh}.output-panel{padding:var(--space-4)}.output-header{flex-direction:column}.output-controls{width:100%}.output-controls .btn{flex:1}.output-footer{flex-direction:column;gap:var(--space-4);align-items:flex-start}.output-footer .btn{width:100%}.empty-state{padding:var(--space-8)}}.btn.loading{pointer-events:none;opacity:.8}.section-actions{display:flex;gap:var(--space-2)}.btn-regen{opacity:0;transition:opacity var(--transition-fast)}.script-section:hover .btn-regen{opacity:1}:focus-visible{outline:2px solid var(--color-accent)}.auth-modal-overlay{position:fixed;inset:0;background:#000000b3;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn var(--transition-fast)}.auth-modal-overlay.hidden{display:none}.auth-modal{background:var(--color-bg-secondary);border-radius:var(--radius-xl);padding:var(--space-8);width:100%;max-width:400px;margin:var(--space-4);box-shadow:var(--shadow-lg);border:1px solid var(--color-border);position:relative;animation:slideUp var(--transition-base)}.auth-close-btn{position:absolute;top:var(--space-4);right:var(--space-4);background:transparent;border:none;color:var(--color-text-tertiary);cursor:pointer;padding:var(--space-1);border-radius:var(--radius-sm);transition:color var(--transition-fast)}.auth-close-btn:hover{color:var(--color-text-primary)}.auth-close-btn svg{width:20px;height:20px}.auth-modal h2{font-size:var(--font-size-2xl);margin-bottom:var(--space-2);text-align:center}.auth-subtitle{text-align:center;color:var(--color-text-secondary);margin-bottom:var(--space-6)}.auth-modal .form-group{margin-bottom:var(--space-4)}.auth-modal .form-group label{display:block;font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text-secondary);margin-bottom:var(--space-2)}.auth-modal .form-group input{width:100%;padding:var(--space-3) var(--space-4);font-size:var(--font-size-base);font-family:var(--font-family);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-tertiary);color:var(--color-text-primary);transition:border-color var(--transition-fast)}.auth-modal .form-group input:focus{outline:none;border-color:var(--color-accent)}.auth-error{color:var(--color-error);font-size:var(--font-size-sm);text-align:center;margin-bottom:var(--space-4)}.auth-switch{text-align:center;margin-top:var(--space-6);font-size:var(--font-size-sm);color:var(--color-text-secondary)}.btn-link{background:none;border:none;color:#60a5fa;cursor:pointer;font-family:var(--font-family);font-size:var(--font-size-sm);font-weight:var(--font-weight-semibold);text-decoration:underline;padding:0;margin-left:var(--space-1);transition:color var(--transition-fast)}.btn-link:hover{color:#93c5fd}#userBtn{gap:var(--space-2)}#userBtn svg{width:18px;height:18px}#userBtnText{font-size:var(--font-size-sm)}