:root{--bg: #141414;--surface: #1b1c1e;--elevated: #282828;--border: #333333;--hover: #2f2f2f;--text: #f5f5f5;--text-muted: #a6a6a6;--text-dim: #666666;--accent: #9ad8ff;--accent-dim: rgba(154, 216, 255, .08);--destructive: hsl(0 84% 60%);--destructive-dim: rgba(239, 68, 68, .06);--success: hsl(145 65% 42%);--success-dim: rgba(34, 197, 94, .06);--radius-sm: 4px;--radius: 6px;--radius-lg: 8px;--mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", monospace;--sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--ease: cubic-bezier(.2, 0, 0, 1)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--sans);background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{max-width:1440px;margin:0 auto;padding:0 24px;min-height:100vh;display:flex;flex-direction:column}.app-header{display:flex;align-items:center;justify-content:space-between;height:56px;border-bottom:1px solid var(--border);gap:16px;flex-shrink:0}.header-left{display:flex;align-items:center;gap:12px}.logo-link{display:flex;align-items:center;color:var(--text);transition:color .12s var(--ease)}.logo-link:hover{color:var(--accent)}.logo-mark{display:block}.header-divider{width:1px;height:16px;background:var(--border)}.app-title{font-size:13px;font-weight:500;color:var(--text-muted);letter-spacing:-.01em}.exp-badge{font-size:10px;font-weight:500;color:var(--accent);background:var(--accent-dim);padding:2px 6px;border-radius:3px;letter-spacing:.02em}.mode-switch{display:flex;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:2px;gap:1px}.mode-btn{font-family:var(--mono);font-size:11px;padding:5px 12px;border:none;border-radius:var(--radius-sm);background:transparent;color:var(--text-dim);cursor:pointer;transition:all .12s var(--ease);white-space:nowrap}.mode-btn:hover{color:var(--text-muted)}.mode-btn.active{background:var(--hover);color:var(--text)}.app-nav{display:flex;gap:4px}.nav-link{font-size:13px;color:var(--text-dim);text-decoration:none;padding:5px 10px;border-radius:var(--radius-sm);transition:all .12s var(--ease)}.nav-link:hover{color:var(--text-muted)}.nav-link.active{color:var(--text);background:var(--hover)}.header-right{display:flex;align-items:center;gap:12px}.toggle-label{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--text-dim);cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-label input{display:none}.toggle-track{width:28px;height:16px;background:var(--elevated);border:1px solid var(--border);border-radius:8px;position:relative;transition:all .12s var(--ease)}.toggle-thumb{position:absolute;top:2px;left:2px;width:10px;height:10px;background:var(--text-dim);border-radius:50%}.toggle-label input:checked~.toggle-track{background:var(--accent-dim);border-color:var(--accent)}.toggle-label input:checked~.toggle-track .toggle-thumb{background:var(--accent)}.svg-toggle-wrap{position:relative}.svg-toggle-btn{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;padding:4px 10px;background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-dim);cursor:pointer;transition:all .12s var(--ease);white-space:nowrap}.svg-toggle-btn:hover{color:var(--text-muted);border-color:var(--hover)}.svg-toggle-btn.active{color:var(--accent);border-color:#9ad8ff4d;background:var(--accent-dim)}.svg-toggle-icon{flex-shrink:0}.svg-badge{display:inline-flex;align-items:center;justify-content:center;min-width:16px;height:16px;padding:0 4px;background:var(--accent);color:var(--bg);border-radius:8px;font-size:10px;font-weight:600;line-height:1}.svg-options-panel{position:absolute;top:calc(100% + 8px);right:0;width:280px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;z-index:50;box-shadow:0 8px 32px #0006,0 2px 8px #0003}.svg-panel-header{font-family:var(--mono);font-size:10px;font-weight:500;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);padding:10px 14px 8px;border-bottom:1px solid var(--border)}.svg-option{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px;cursor:pointer;transition:background .1s var(--ease);-webkit-user-select:none;user-select:none}.svg-option:hover{background:var(--hover)}.svg-option+.svg-option{border-top:1px solid rgba(51,51,51,.5)}.svg-option input{display:none}.svg-option-info{display:flex;flex-direction:column;gap:2px;min-width:0}.svg-option-title{font-size:12px;color:var(--text);font-weight:450;letter-spacing:-.01em}.svg-option-desc{font-size:10px;color:var(--text-dim);line-height:1.3}.svg-option input:checked~.toggle-track{background:var(--accent-dim);border-color:var(--accent)}.svg-option input:checked~.toggle-track .toggle-thumb{background:var(--accent)}.converter{display:grid;grid-template-columns:1fr 48px 1fr;height:calc(100vh - 104px);padding:16px 0 8px;gap:0;overflow:hidden}.panel{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;background:var(--surface);min-height:0;max-height:100%}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:0 12px;height:35px;border-bottom:1px solid var(--border);flex-shrink:0}.panel-label{font-family:var(--mono);font-size:11px;font-weight:500;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em}.panel-hint{font-size:11px;color:var(--text-dim);opacity:.6}.editor-container{flex:1;min-height:0;overflow:hidden}.editor-container .cm-editor{height:100%;overflow:hidden}.editor-container .cm-scroller{overflow:auto!important}.action-col{display:flex;align-items:center;justify-content:center}.convert-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;background:var(--text);color:var(--bg);border:none;border-radius:var(--radius);cursor:pointer;transition:all .12s var(--ease)}.convert-btn:hover{background:var(--accent);transform:scale(1.05)}.convert-btn:active{transform:scale(.95)}.copy-btn{font-family:var(--mono);font-size:10px;padding:3px 8px;background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-dim);cursor:pointer;transition:all .12s var(--ease)}.copy-btn:hover{color:var(--text-muted);border-color:var(--hover)}.copy-btn.copied{color:var(--accent);border-color:#9ad8ff4d}.output-col{display:flex;flex-direction:column;gap:8px;min-height:0;max-height:100%}.output-col .panel-output{flex:1;min-height:0}.output-col .panel-css{flex:0 0 35%;min-height:0}.toast-container{position:fixed;bottom:48px;right:24px;display:flex;flex-direction:column-reverse;gap:6px;z-index:100;pointer-events:none}.toast{display:flex;align-items:center;gap:8px;padding:8px 10px 8px 12px;border-radius:var(--radius);font-size:12px;font-family:var(--sans);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);cursor:pointer;pointer-events:auto;visibility:hidden;max-width:400px;box-shadow:0 4px 16px #0000004d}.toast-success{background:rgba(20,20,20,.9);border:1px solid rgba(34,197,94,.2);color:var(--text)}.toast-error{background:rgba(20,20,20,.9);border:1px solid rgba(239,68,68,.2);color:var(--text)}.toast-icon{display:flex;align-items:center;flex-shrink:0}.toast-success .toast-icon{color:var(--success)}.toast-error .toast-icon{color:var(--destructive)}.toast-text{flex:1;line-height:1.4;color:var(--text-muted)}.toast-close{display:flex;align-items:center;justify-content:center;width:20px;height:20px;background:none;border:none;color:var(--text-dim);cursor:pointer;border-radius:3px;flex-shrink:0;opacity:0;transition:all .12s var(--ease)}.toast:hover .toast-close{opacity:1}.toast-close:hover{background:rgba(255,255,255,.06);color:var(--text-muted)}.app-footer{display:flex;align-items:center;justify-content:space-between;height:32px;border-top:1px solid var(--border);font-family:var(--mono);font-size:11px;color:var(--text-dim);flex-shrink:0}.footer-right{display:flex;align-items:center;gap:8px}.footer-hint{opacity:.5}.footer-divider{opacity:.3}.share-btn{font-family:var(--mono);font-size:11px;padding:2px 8px;background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-dim);cursor:pointer;transition:all .12s var(--ease)}.share-btn:hover{color:var(--text-muted);border-color:var(--hover)}.share-btn.copied{color:var(--accent);border-color:#9ad8ff4d}.footer-link{color:var(--text-muted);text-decoration:none;transition:color .12s var(--ease)}.footer-link:hover{color:var(--accent)}@media (max-width: 900px){.converter{grid-template-columns:1fr;gap:0}.action-col{padding:8px 0}.convert-btn{width:100%;height:32px}.converter{height:auto}.editor-container{min-height:240px}.app-header{flex-wrap:wrap;height:auto;padding:12px 0;gap:8px}.footer-hint{display:none}.header-right{width:100%;justify-content:flex-end}.mode-switch{width:100%}.mode-btn{flex:1;text-align:center}.svg-options-panel{position:fixed;top:auto;bottom:48px;right:16px;left:16px;width:auto}}