*{margin:0;padding:0;box-sizing:border-box}:root{--bg-dark: #1a1a1a;--bg-light: #ffffff;--header-bg: #2d3748;--text-light: #e2e8f0;--text-dark: #1a202c;--border-color: #cbd5e0;--button-primary: #2d3748;--button-hover: #1a202c;--textarea-bg: #f7fafc;--code-bg: #2d3748;--accent: #3182ce}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:var(--bg-light);color:var(--text-dark)}code,pre{font-family:Monaco,Menlo,Ubuntu Mono,Consolas,source-code-pro,monospace}.header{background-color:var(--header-bg);color:var(--text-light);padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.header-logo{font-size:1.5rem;font-weight:700;color:var(--text-light);text-decoration:none}.header-nav{display:flex;gap:1.5rem}.header-link{color:var(--text-light);text-decoration:none;font-size:1rem;transition:opacity .2s}.header-link:hover{opacity:.8}.container{max-width:1400px;margin:0 auto;padding:2rem}.control-panel{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap;align-items:center}.control-group{display:flex;align-items:center;gap:.5rem}.control-panel select{padding:.5rem 2rem .5rem .75rem;border:1px solid var(--border-color);border-radius:4px;background-color:#fff;font-size:.9rem;cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 9L1 4h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .5rem center;min-width:150px}.control-panel select:focus{outline:2px solid var(--accent);outline-offset:2px}.checkbox-wrapper{display:flex;align-items:center;gap:.5rem}.checkbox-wrapper input[type=checkbox]{width:16px;height:16px;cursor:pointer}.checkbox-wrapper label{cursor:pointer;-webkit-user-select:none;user-select:none}.spacer{flex-grow:1}.btn-primary{background-color:var(--button-primary);color:#fff;padding:.5rem 1.5rem;border:none;border-radius:4px;font-size:.9rem;cursor:pointer;transition:background-color .2s;display:flex;align-items:center;gap:.5rem}.btn-primary:hover:not(:disabled){background-color:var(--button-hover)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.shortcut-hint{font-size:.85rem;opacity:.7}.code-editor{width:100%;min-height:500px;padding:1rem;border:1px solid var(--border-color);border-radius:4px;font-family:Monaco,Menlo,Ubuntu Mono,Consolas,monospace;font-size:.95rem;line-height:1.6;resize:vertical;background-color:var(--textarea-bg)}.code-editor:focus{outline:2px solid var(--accent);outline-offset:2px}.paste-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.paste-meta{display:flex;gap:1.5rem;font-size:.9rem;color:#666}.paste-actions{display:flex;gap:.5rem}.btn-secondary{background-color:#fff;color:var(--text-dark);padding:.5rem 1rem;border:1px solid var(--border-color);border-radius:4px;font-size:.9rem;cursor:pointer;transition:background-color .2s}.btn-secondary:hover{background-color:#f7fafc}.code-viewer{border:1px solid var(--border-color);border-radius:4px;overflow:auto;max-height:80vh}.code-viewer pre{margin:0!important;padding:1rem!important;background-color:var(--code-bg)!important}.success-message{background-color:#c6f6d5;border:1px solid #68d391;color:#22543d;padding:1rem;border-radius:4px;margin-bottom:1rem}.url-display{display:flex;gap:.5rem;margin-top:.5rem;align-items:center}.url-input{flex-grow:1;padding:.5rem;border:1px solid #68d391;border-radius:4px;font-family:monospace;background-color:#fff}.error-message{background-color:#fed7d7;border:1px solid #fc8181;color:#742a2a;padding:1rem;border-radius:4px;margin-bottom:1rem}.warning-message{background-color:#feebc8;border:1px solid #f6ad55;color:#7c2d12;padding:1rem;border-radius:4px;margin-bottom:1rem}.about-content{max-width:800px;margin:0 auto;line-height:1.8}.about-content h1{margin-bottom:1rem}.about-content h2{margin-top:2rem;margin-bottom:1rem}.about-content p{margin-bottom:1rem}.about-content ul{margin-left:2rem;margin-bottom:1rem}.history-list{display:flex;flex-direction:column;gap:1rem}.history-item{padding:1rem;border:1px solid var(--border-color);border-radius:4px;display:flex;justify-content:space-between;align-items:center;transition:background-color .2s}.history-item:hover{background-color:#f7fafc}.history-item-info{display:flex;gap:1rem;align-items:center}.language-badge{background-color:var(--header-bg);color:#fff;padding:.25rem .75rem;border-radius:4px;font-size:.85rem;font-weight:500}.history-meta{font-size:.9rem;color:#666}.btn-link{color:var(--accent);text-decoration:none;padding:.5rem 1rem;border-radius:4px;transition:background-color .2s}.btn-link:hover{background-color:#e6f7ff}.loading{text-align:center;padding:3rem;font-size:1.1rem;color:#666}@media (max-width: 768px){.control-panel{flex-direction:column;align-items:stretch}.control-panel select{width:100%}.header{flex-direction:column;gap:1rem}.paste-header{flex-direction:column;gap:1rem;align-items:flex-start}.paste-meta{flex-direction:column;gap:.5rem}}