:root{--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;--font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Consolas, "DejaVu Sans Mono", monospace;--toolbar-height: 48px;--header-height: 40px;--editor-width: 42%;--divider-width: 6px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--transition-fast: .15s ease;--transition-normal: .25s ease}[data-theme=dark]{--color-bg-primary: #1a1a2e;--color-bg-secondary: #16213e;--color-bg-tertiary: #0f3460;--color-bg-input: #121c34;--color-bg-hover: rgba(255, 255, 255, .06);--color-bg-active: rgba(255, 255, 255, .1);--color-surface: #1e2545;--color-surface-raised: #232b4a;--color-border: rgba(255, 255, 255, .08);--color-border-strong: rgba(255, 255, 255, .15);--color-divider: rgba(255, 255, 255, .06);--color-divider-hover: rgba(99, 102, 241, .5);--color-text-primary: #e2e8f0;--color-text-secondary: #94a3b8;--color-text-muted: #64748b;--color-text-inverse: #1a1a2e;--color-accent: #6366f1;--color-accent-hover: #818cf8;--color-accent-muted: rgba(99, 102, 241, .15);--color-error: #f87171;--color-error-bg: rgba(248, 113, 113, .1);--color-success: #34d399;--color-warning: #fbbf24;--color-scrollbar-track: #1a1a2e;--color-scrollbar-thumb: #334155;--color-scrollbar-thumb-hover: #475569;--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)}[data-theme=light]{--color-bg-primary: #ffffff;--color-bg-secondary: #f8fafc;--color-bg-tertiary: #f1f5f9;--color-bg-input: #ffffff;--color-bg-hover: rgba(0, 0, 0, .04);--color-bg-active: rgba(0, 0, 0, .08);--color-surface: #ffffff;--color-surface-raised: #f8fafc;--color-border: rgba(0, 0, 0, .08);--color-border-strong: rgba(0, 0, 0, .15);--color-divider: rgba(0, 0, 0, .06);--color-divider-hover: rgba(99, 102, 241, .4);--color-text-primary: #1e293b;--color-text-secondary: #475569;--color-text-muted: #94a3b8;--color-text-inverse: #ffffff;--color-accent: #6366f1;--color-accent-hover: #4f46e5;--color-accent-muted: rgba(99, 102, 241, .1);--color-error: #ef4444;--color-error-bg: rgba(239, 68, 68, .08);--color-success: #10b981;--color-warning: #f59e0b;--color-scrollbar-track: #f1f5f9;--color-scrollbar-thumb: #cbd5e1;--color-scrollbar-thumb-hover: #94a3b8;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .06);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;overflow:hidden;font-family:var(--font-sans);font-size:14px;line-height:1.5;color:var(--color-text-primary);background-color:var(--color-bg-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-normal),color var(--transition-normal)}#app{display:flex;flex-direction:column;height:100vh;height:100dvh;width:100vw;overflow:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--color-scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-scrollbar-thumb-hover)}*{scrollbar-width:thin;scrollbar-color:var(--color-scrollbar-thumb) var(--color-scrollbar-track)}.toolbar{display:flex;align-items:center;height:var(--toolbar-height);min-height:var(--toolbar-height);padding:0 12px;background-color:var(--color-bg-secondary);border-bottom:1px solid var(--color-border);gap:8px;z-index:100;transition:background-color var(--transition-normal),border-color var(--transition-normal)}.toolbar-section{display:flex;align-items:center}.toolbar-left{gap:12px;flex-shrink:0}.toolbar-middle{display:flex;align-items:center;gap:4px;flex:1;justify-content:center;flex-wrap:wrap}.toolbar-right{gap:4px;flex-shrink:0}.toolbar-logo-icon{width:20px;height:20px;flex-shrink:0}.toolbar-logo{font-size:16px;font-weight:700;color:var(--color-accent);letter-spacing:-.02em;-webkit-user-select:none;user-select:none;white-space:nowrap}.toolbar-group{display:flex;align-items:center;gap:2px}.toolbar-divider{width:1px;height:20px;background-color:var(--color-border-strong);margin:0 6px;flex-shrink:0}.toolbar-btn{display:inline-flex;align-items:center;justify-content:center;gap:5px;height:32px;padding:0 10px;font-family:var(--font-sans);font-size:12.5px;font-weight:500;color:var(--color-text-secondary);background:transparent;border:1px solid transparent;border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.toolbar-btn:hover{color:var(--color-text-primary);background-color:var(--color-bg-hover);border-color:var(--color-border)}.toolbar-btn:active{background-color:var(--color-bg-active)}.toolbar-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:1px}.toolbar-btn-icon{padding:0;width:32px}.toolbar-btn-label{pointer-events:none}.toolbar-dropdown-wrapper{position:relative;display:inline-flex}.toolbar-icon-chevron{width:12px;height:12px;margin-left:-2px;opacity:.6}.toolbar-dropdown-menu{position:absolute;top:calc(100% + 4px);left:0;min-width:180px;max-height:360px;overflow-y:auto;padding:4px;background-color:var(--color-surface-raised);border:1px solid var(--color-border-strong);border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:200;display:flex;flex-direction:column;gap:1px}.toolbar-dropdown-menu[hidden]{display:none}.toolbar-dropdown-item{display:block;width:100%;padding:7px 12px;font-family:var(--font-sans);font-size:12.5px;font-weight:500;color:var(--color-text-secondary);text-align:left;background:transparent;border:none;border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;transition:all var(--transition-fast)}.toolbar-dropdown-item:hover{color:var(--color-text-primary);background-color:var(--color-bg-hover)}.toolbar-dropdown-item:active{background-color:var(--color-bg-active)}.toolbar-dropdown-item:focus-visible{outline:2px solid var(--color-accent);outline-offset:-1px}.toolbar-icon{width:16px;height:16px;flex-shrink:0;display:inline-block;vertical-align:middle}.toolbar-error-indicator{display:inline-block;width:8px;height:8px;border-radius:50%;background-color:var(--color-error);margin-left:8px;flex-shrink:0;animation:error-pulse 1.5s ease-in-out infinite}.toolbar-error-indicator[hidden]{display:none}@keyframes error-pulse{0%,to{opacity:1}50%{opacity:.4}}.toolbar-file-input{position:absolute;width:0;height:0;opacity:0;overflow:hidden;pointer-events:none}.app-content{display:flex;flex:1;min-height:0;overflow:hidden}.panel-divider{width:var(--divider-width);background-color:var(--color-divider);cursor:col-resize;flex-shrink:0;position:relative;z-index:10;transition:background-color var(--transition-fast)}.panel-divider:after{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:32px;border-radius:1px;background-color:var(--color-border-strong);opacity:0;transition:opacity var(--transition-fast)}.panel-divider:hover{background-color:var(--color-divider-hover)}.panel-divider:hover:after{opacity:1}.panel-divider:active{background-color:var(--color-accent)}.editor-panel{display:flex;flex-direction:column;width:var(--editor-width);min-width:250px;background-color:var(--color-bg-primary);transition:background-color var(--transition-normal);overflow:hidden}.editor-header{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);min-height:var(--header-height);padding:0 14px;font-size:12px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;background-color:var(--color-bg-secondary);border-bottom:1px solid var(--color-border);-webkit-user-select:none;user-select:none;transition:background-color var(--transition-normal),border-color var(--transition-normal)}.editor-header-label{display:flex;align-items:center}.editor-textarea{flex:1;width:100%;padding:16px;font-family:var(--font-mono);font-size:13.5px;line-height:1.65;color:var(--color-text-primary);background-color:var(--color-bg-input);border:none;outline:none;resize:none;-moz-tab-size:4;tab-size:4;white-space:pre;overflow:auto;transition:background-color var(--transition-normal),color var(--transition-normal)}.editor-textarea::placeholder{color:var(--color-text-muted)}.editor-textarea:focus{background-color:var(--color-bg-primary)}.preview-panel{display:flex;flex-direction:column;flex:1;min-width:250px;background-color:var(--color-bg-secondary);transition:background-color var(--transition-normal);overflow:hidden}.preview-header{display:flex;align-items:center;justify-content:space-between;height:var(--header-height);min-height:var(--header-height);padding:0 14px;font-size:12px;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;background-color:var(--color-bg-secondary);border-bottom:1px solid var(--color-border);-webkit-user-select:none;user-select:none;transition:background-color var(--transition-normal),border-color var(--transition-normal)}.preview-header-label{display:flex;align-items:center}.preview-zoom-controls{display:flex;align-items:center;gap:2px}.preview-zoom-btn{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:26px;padding:0 6px;font-family:var(--font-sans);font-size:12px;font-weight:500;color:var(--color-text-muted);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);-webkit-user-select:none;user-select:none}.preview-zoom-btn:hover{color:var(--color-text-primary);background-color:var(--color-bg-hover);border-color:var(--color-border)}.preview-zoom-btn:active{background-color:var(--color-bg-active)}.preview-zoom-btn:focus-visible{outline:2px solid var(--color-accent);outline-offset:1px}.preview-zoom-label{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:20px;padding:0 6px;margin-left:4px;font-family:var(--font-mono, monospace);font-size:10px;font-weight:400;color:var(--color-text-muted);background:var(--color-bg-secondary);border-radius:var(--radius-sm);-webkit-user-select:none;user-select:none;text-align:center;cursor:default;opacity:.8}.preview-content{flex:1;overflow:hidden;position:relative;cursor:grab;background-color:var(--color-bg-secondary);transition:background-color var(--transition-normal)}.preview-content:active{cursor:grabbing}.preview-transform-wrapper{transform-origin:0 0;display:inline-block}.preview-transform-wrapper svg{max-width:none;display:block}.preview-placeholder{display:flex;align-items:center;justify-content:center;width:100%;padding:32px;color:var(--color-text-muted);font-size:14px;-webkit-user-select:none;user-select:none;text-align:center}.preview-error{display:flex;align-items:center;justify-content:center;cursor:default}.preview-error-message{display:flex;flex-direction:column;align-items:center;gap:10px;padding:32px;text-align:center;max-width:500px}.preview-error-title{font-size:13px;font-weight:600;color:var(--color-error)}.preview-error-detail{font-family:var(--font-mono);font-size:12px;line-height:1.5;color:var(--color-text-muted);background-color:var(--color-error-bg);padding:12px 16px;border-radius:var(--radius-md);text-align:left;word-break:break-word;white-space:pre-wrap;max-height:200px;overflow-y:auto;width:100%}.app-footer{display:flex;align-items:center;justify-content:center;gap:12px;height:28px;min-height:28px;padding:0 12px;font-size:11px;color:var(--color-text-muted);background-color:var(--color-bg-secondary);border-top:1px solid var(--color-border);-webkit-user-select:none;user-select:none;transition:background-color var(--transition-normal),border-color var(--transition-normal),color var(--transition-normal)}.app-footer-tagline{font-style:italic;letter-spacing:.01em}.app-footer-link{display:inline-flex;align-items:center;gap:4px;color:var(--color-text-muted);text-decoration:none;font-weight:500;transition:color var(--transition-fast)}.app-footer-link:hover{color:var(--color-accent)}.app-footer-github-icon{width:13px;height:13px;flex-shrink:0}.toast{position:fixed;bottom:48px;left:50%;transform:translate(-50%) translateY(80px);padding:8px 18px;font-size:13px;font-weight:500;color:var(--color-text-inverse);background-color:var(--color-accent);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);z-index:1000;pointer-events:none;opacity:0;transition:all .3s cubic-bezier(.16,1,.3,1);white-space:nowrap}.toast--visible{opacity:1;transform:translate(-50%) translateY(0)}.toast--error{background-color:var(--color-error)}.toast--success{background-color:var(--color-success)}.shortcuts-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:2000;display:flex;align-items:center;justify-content:center;background:#00000080;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.shortcuts-dialog{background-color:var(--color-surface-raised);border:1px solid var(--color-border-strong);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:20px 24px;min-width:300px;max-width:400px}.shortcuts-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.shortcuts-title{font-family:var(--font-sans);font-size:16px;font-weight:600;color:var(--color-text-primary);margin:0}.shortcuts-close-btn{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;font-size:18px;color:var(--color-text-muted);background:transparent;border:1px solid transparent;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast)}.shortcuts-close-btn:hover{color:var(--color-text-primary);background-color:var(--color-bg-hover);border-color:var(--color-border)}.shortcuts-list{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;align-items:center;margin:0}.shortcuts-key{margin:0}.shortcuts-key kbd{display:inline-block;padding:2px 8px;font-family:var(--font-mono, monospace);font-size:12px;color:var(--color-text-primary);background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-sm);white-space:nowrap}.shortcuts-desc{margin:0;font-family:var(--font-sans);font-size:13px;color:var(--color-text-muted)}@media(max-width:768px){.app-footer{display:none}.toast{bottom:20px}.app-content{flex-direction:column}.editor-panel{width:100%;height:40%;min-width:unset;min-height:150px}.panel-divider{width:100%;height:var(--divider-width);cursor:row-resize}.panel-divider:after{width:32px;height:2px}.preview-panel{min-width:unset;min-height:150px}.toolbar-middle{overflow-x:auto;-webkit-overflow-scrolling:touch;flex-shrink:1;min-width:0}.toolbar-btn-label{display:none}.toolbar-btn{padding:0;width:32px}}@media(max-width:480px){.toolbar{padding:0 8px;gap:4px}.toolbar-logo{font-size:14px}.editor-textarea{padding:12px;font-size:13px}}::selection{background-color:var(--color-accent-muted);color:var(--color-text-primary)}:focus-visible{outline:2px solid var(--color-accent);outline-offset:1px}