:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:100vw;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--color-primary: #60a5fa;--color-primary-hover: #3b82f6;--color-primary-dark: #2563eb;--color-success: #10b981;--color-error: #ef4444;--color-warning: #f59e0b;--bg-primary: #000000;--bg-secondary: #0a0a0a;--bg-card: #111111;--bg-card-hover: #1a1a1a;--bg-input: #0d0d0d;--text-primary: #ffffff;--text-secondary: #a3a3a3;--text-muted: #737373;--text-disabled: #525252;--border-color: #262626;--border-color-light: #404040;--border-color-focus: var(--color-primary);--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 1.5rem;--spacing-lg: 2rem;--spacing-xl: 3rem;--border-radius: 6px;--border-radius-lg: 10px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .5);--shadow-md: 0 4px 6px rgba(0, 0, 0, .5);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .6);--shadow-glow: 0 0 20px rgba(96, 165, 250, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;color:var(--text-primary);background-color:var(--bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden;width:100%}#root{width:100%;min-height:100vh;display:flex;justify-content:center}.app{width:100%;margin:0 auto;padding:var(--spacing-lg);min-height:100vh;display:flex;align-items:center;flex-direction:column}.app-header{width:100%;text-align:center;margin-bottom:var(--spacing-xl);padding-bottom:var(--spacing-lg);border-bottom:1px solid var(--border-color)}.app-header h1{font-size:2.5rem;font-weight:600;margin-bottom:var(--spacing-sm);color:var(--text-primary);letter-spacing:-.02em}.subtitle{color:var(--text-secondary);font-size:1rem;font-weight:400;letter-spacing:.01em}.tabs-container{width:100%;margin-bottom:var(--spacing-lg);display:flex;justify-content:center}.tabs{display:inline-flex;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--border-radius-lg);padding:4px;gap:4px}.tab{padding:.75rem 1.5rem;border:none;background:transparent;color:var(--text-secondary);font-size:.95rem;font-weight:500;cursor:pointer;border-radius:calc(var(--border-radius-lg) - 4px);transition:all .2s ease;display:flex;align-items:center;gap:var(--spacing-xs);letter-spacing:.01em}.tab:hover{color:var(--text-primary);background:var(--bg-card-hover)}.tab.active{background:var(--color-primary);color:#fff;box-shadow:0 2px 8px #60a5fa4d}.tab-icon{font-size:1.1rem;line-height:1}.app-main{width:100%;flex:1;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.input-section,.output-section{width:100%;min-width:0;background:var(--bg-card);padding:var(--spacing-lg);border-radius:var(--border-radius-lg);border:1px solid var(--border-color);transition:all .3s ease}.input-section:hover,.output-section:hover{border-color:var(--border-color-light);box-shadow:var(--shadow-glow)}.info-section{width:100%;grid-column:1 / -1;background:var(--bg-card);padding:var(--spacing-lg);border-radius:var(--border-radius-lg);border:1px solid var(--border-color);transition:all .3s ease}.info-section:hover{border-color:var(--border-color-light)}.decoder-input h2,.decoder-output h2{font-size:1.25rem;font-weight:600;margin-bottom:var(--spacing-md);color:var(--text-primary);letter-spacing:-.01em}.base64-textarea{width:100%;padding:var(--spacing-md);background:var(--bg-input);color:var(--text-primary);border:1px solid var(--border-color);border-radius:var(--border-radius);font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,Courier New,monospace;font-size:.95rem;line-height:1.6;resize:vertical;transition:all .2s ease}.base64-textarea:focus{outline:none;border-color:var(--border-color-focus);background:var(--bg-secondary);box-shadow:0 0 0 3px #60a5fa1a}.base64-textarea::placeholder{color:var(--text-muted)}.input-info{margin-top:var(--spacing-sm);color:var(--text-muted);font-size:.875rem}.error-display{margin-top:var(--spacing-md);padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--border-radius);display:flex;align-items:center;gap:var(--spacing-sm);font-size:.9rem;border:1px solid;animation:slideIn .3s ease}@keyframes slideIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.error-display.success{background:#10b9810d;border-color:#10b98133;color:var(--color-success)}.error-display.error{background:#ef44440d;border-color:#ef444433;color:var(--color-error)}.status-indicator{width:8px;height:8px;border-radius:50%;flex-shrink:0}.success-indicator{background:var(--color-success);box-shadow:0 0 8px #10b98166}.error-indicator{background:var(--color-error);box-shadow:0 0 8px #ef444466}.action-buttons{display:flex;gap:var(--spacing-sm);margin-top:var(--spacing-md)}.btn{flex:1;padding:.75rem var(--spacing-md);border:1px solid;border-radius:var(--border-radius);font-size:.95rem;font-weight:500;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;justify-content:center;letter-spacing:.02em}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);border-color:var(--color-primary-hover);transform:translateY(-1px);box-shadow:0 4px 12px #60a5fa4d}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background:transparent;border-color:var(--border-color-light);color:var(--text-primary)}.btn-secondary:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--border-color-focus)}.output-placeholder,.output-error,.output-success{padding:var(--spacing-lg);border-radius:var(--border-radius);min-height:200px;border:1px solid}.output-placeholder{background:var(--bg-input);border-color:var(--border-color);border-style:dashed;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--text-secondary)}.output-placeholder p{font-size:1rem;margin-bottom:var(--spacing-xs)}.output-placeholder small{color:var(--text-muted);font-size:.875rem}.output-error{background:#ef44440d;border-color:#ef444433}.output-error .error-label{color:var(--color-error);font-weight:500;margin-bottom:var(--spacing-xs)}.output-error code{display:block;margin-top:var(--spacing-sm);padding:var(--spacing-sm);background:var(--bg-input);border-radius:var(--border-radius);border:1px solid rgba(239,68,68,.1);color:var(--color-error);font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,monospace;font-size:.9rem}.output-success{background:#10b98108;border-color:#10b98133}.decoded-text{width:100%;padding:var(--spacing-md);background:var(--bg-input);border:1px solid var(--border-color);border-radius:var(--border-radius);font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,monospace;font-size:1rem;line-height:1.8;color:var(--text-primary);word-break:break-word;white-space:pre-wrap;min-height:100px;max-height:400px;overflow-y:auto;overflow-x:hidden;box-sizing:border-box}.output-info{margin-top:var(--spacing-sm);color:var(--color-success);font-size:.875rem}.process-visualizer h3{font-size:1.25rem;font-weight:600;margin-bottom:var(--spacing-md);color:var(--text-primary);letter-spacing:-.01em}.info-card{background:var(--bg-input);padding:var(--spacing-md);border-radius:var(--border-radius);border:1px solid var(--border-color);margin-bottom:var(--spacing-md)}.info-card:last-child{margin-bottom:0}.info-card h4{color:var(--color-primary);font-size:1rem;font-weight:500;margin-bottom:var(--spacing-sm)}.info-description{color:var(--text-secondary);line-height:1.7;margin-bottom:var(--spacing-sm)}.info-list{margin-left:var(--spacing-md);margin-top:var(--spacing-sm);list-style:none;padding:0}.info-list li{margin-bottom:var(--spacing-xs);color:var(--text-secondary);padding-left:var(--spacing-md);position:relative;line-height:1.6}.info-list li:before{content:"•";position:absolute;left:0;color:var(--color-primary);font-weight:700}.info-card code{background:var(--bg-secondary);padding:2px 8px;border-radius:4px;border:1px solid var(--border-color);color:var(--color-primary);font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,monospace;font-size:.9em}.example{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md);background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);margin:var(--spacing-sm) 0;flex-wrap:wrap}.input-example,.output-example{font-family:SF Mono,Monaco,Cascadia Code,Roboto Mono,monospace;padding:var(--spacing-xs) var(--spacing-sm);border-radius:4px;font-size:1.1rem;font-weight:500}.input-example{background:#f59e0b1a;color:var(--color-warning);border:1px solid rgba(245,158,11,.2)}.output-example{background:#10b9811a;color:var(--color-success);border:1px solid rgba(16,185,129,.2)}.arrow{color:var(--text-muted);font-size:1.5rem}.example-description{display:block;margin-top:var(--spacing-sm);color:var(--text-muted);font-size:.875rem;line-height:1.6}.app-footer{text-align:center;padding-top:var(--spacing-lg);margin-top:var(--spacing-lg);border-top:1px solid var(--border-color);color:var(--text-muted);font-size:.9rem}.app-footer p{margin-bottom:var(--spacing-xs)}.app-footer small{display:block;color:var(--text-disabled);font-size:.85rem}@media(max-width:968px){.app-main{grid-template-columns:1fr}.app-header h1{font-size:2rem}.subtitle{font-size:.95rem}}@media(max-width:768px){.app{padding:var(--spacing-md)}.app-header h1{font-size:1.875rem}.decoded-text{font-size:.95rem}}@media(max-width:640px){.app{padding:var(--spacing-sm)}.app-header h1{font-size:1.75rem}.subtitle{font-size:.875rem}.tabs-container{margin-bottom:var(--spacing-md)}.tabs{width:100%}.tab{flex:1;padding:.65rem 1rem;font-size:.9rem}.input-section,.output-section,.info-section{padding:var(--spacing-md)}.action-buttons{flex-direction:column}.example{flex-direction:column;align-items:flex-start}.arrow{transform:rotate(90deg)}.base64-textarea{font-size:.9rem}.btn{padding:.65rem var(--spacing-sm);font-size:.9rem}}@media(max-width:480px){.app{padding:var(--spacing-xs)}.app-header{margin-bottom:var(--spacing-lg)}.app-header h1{font-size:1.5rem}.subtitle{font-size:.8rem}}.decoded-text::-webkit-scrollbar{width:6px}.decoded-text::-webkit-scrollbar-track{background:var(--bg-secondary);border-radius:3px}.decoded-text::-webkit-scrollbar-thumb{background:var(--border-color-light);border-radius:3px}.decoded-text::-webkit-scrollbar-thumb:hover{background:var(--color-primary)}@media(prefers-reduced-motion:no-preference){.input-section,.output-section,.info-section{transition:all .3s cubic-bezier(.4,0,.2,1)}.btn{transition:all .2s cubic-bezier(.4,0,.2,1)}}