*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--max-width: 720px;--radius: 10px;--radius-sm: 6px;--transition: .2s ease}[data-theme=light]{--bg: #f8f9fa;--bg-card: #ffffff;--bg-input: #ffffff;--bg-hover: #f0f0f0;--bg-section-header: #f0f1f3;--border: #dcdee1;--text: #1a1a1a;--text-muted: #6b7280;--text-code: #d63384;--accent: #3b82f6;--accent-hover: #2563eb;--shadow: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .06);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1);--github-invert: 0;--logo-invert: 0}[data-theme=dark]{--bg: #0f1117;--bg-card: #1a1d27;--bg-input: #1e2130;--bg-hover: #252836;--bg-section-header: #1e2130;--border: #2d3040;--text: #e4e6eb;--text-muted: #8b8fa3;--text-code: #f472b6;--accent: #60a5fa;--accent-hover: #93c5fd;--shadow: 0 1px 3px rgba(0, 0, 0, .3);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .4);--github-invert: 1;--logo-invert: 1}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;transition:background var(--transition),color var(--transition)}.app{max-width:var(--max-width);margin:0 auto;padding:24px 16px}.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.logo-link{display:flex;align-items:center;text-decoration:none}.logo{height:52px;width:auto;filter:invert(var(--logo-invert));transition:filter var(--transition)}.tagline{color:var(--text-muted);font-size:14px;margin-bottom:24px}.theme-toggle{background:var(--bg-card);border:1px solid var(--border);border-radius:50%;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:all var(--transition)}.theme-toggle:hover{color:var(--text);border-color:var(--accent)}[data-theme=dark] .icon-sun{display:block}[data-theme=dark] .icon-moon,[data-theme=light] .icon-sun{display:none}[data-theme=light] .icon-moon{display:block}.engines{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.engine-btn{display:flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid var(--border);border-radius:20px;background:var(--bg-card);color:var(--text);cursor:pointer;font-size:13px;font-weight:500;transition:all var(--transition);-webkit-user-select:none;user-select:none}.engine-btn:hover{border-color:var(--accent)}.engine-btn.active{border-color:var(--accent);background:var(--accent);color:#fff}.engine-btn.active:hover{background:var(--accent-hover)}.engine-btn img{width:16px;height:16px;border-radius:2px}.engine-btn:not(.active) img{filter:grayscale(100%);opacity:.5}.search-bar{display:flex;align-items:flex-start;gap:8px;margin-bottom:28px}.search-input-wrap{position:relative;flex:1;display:flex}.search-bar textarea{width:100%;padding:12px 40px 12px 16px;font-family:var(--font);font-size:15px;line-height:1.5;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-input);color:var(--text);outline:none;resize:none;overflow:hidden;transition:border-color var(--transition),box-shadow var(--transition)}.search-bar textarea::placeholder{color:var(--text-muted)}.search-bar textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #3b82f626}.search-clear{position:absolute;top:12px;right:8px;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border:none;border-radius:50%;background:transparent;color:var(--text-muted);font-size:20px;line-height:1;cursor:pointer;transition:background var(--transition),color var(--transition)}.search-clear:hover{background:var(--bg-hover);color:var(--text)}.search-clear[hidden]{display:none}.nostem-bar{display:flex;align-items:center;justify-content:flex-end;gap:8px;margin:-20px 4px 28px 0;font-size:13px;color:var(--text-muted);animation:nostem-in .25s ease}.nostem-bar[hidden]{display:none}@keyframes nostem-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.nostem-icon{width:14px;height:14px}.nostem-label{cursor:default}.nostem-hint{opacity:.75}.nostem-switch{position:relative;width:34px;height:19px;flex-shrink:0;border:1px solid var(--border);border-radius:999px;background:var(--bg-input);cursor:pointer;transition:background var(--transition),border-color var(--transition)}.nostem-knob{position:absolute;top:2px;left:2px;width:13px;height:13px;border-radius:50%;background:var(--text-muted);transition:transform var(--transition),background var(--transition)}.nostem-switch[aria-checked=true]{background:var(--accent);border-color:var(--accent)}.nostem-switch[aria-checked=true] .nostem-knob{transform:translate(15px);background:#fff}.search-btn{padding:12px 28px;font-size:15px;font-weight:600;border:none;border-radius:var(--radius);background:var(--accent);color:#fff;cursor:pointer;transition:all var(--transition);white-space:nowrap}.search-btn:hover{background:var(--accent-hover)}.search-btn:active{transform:scale(.97)}.popup-warning{display:flex;align-items:center;gap:10px;padding:11px 14px;margin-bottom:20px;border-radius:var(--radius);background:#f59e0b;color:#1f2937;font-size:14px;line-height:1.45}.popup-warning[hidden]{display:none}.popup-warning-icon{flex-shrink:0}.popup-warning-text{flex:1}.popup-warning-text a{color:#1f2937;font-weight:600;text-decoration:underline}.popup-warning-close{flex-shrink:0;border:none;background:transparent;color:#1f2937;font-size:22px;line-height:1;padding:0 2px;cursor:pointer;opacity:.7;transition:opacity var(--transition)}.popup-warning-close:hover{opacity:1}.section{margin-bottom:12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);overflow:hidden;transition:background var(--transition),border-color var(--transition)}.section-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:12px 16px;border:none;background:var(--bg-section-header);color:var(--text);font-size:15px;font-weight:600;cursor:pointer;transition:all var(--transition)}.section-toggle:hover{background:var(--bg-hover)}.section-toggle .chevron{transition:transform .25s ease}.section-toggle.open .chevron{transform:rotate(180deg)}.section-content{padding:16px;display:none}.section-content.open{display:block}.help-list{padding-left:20px;color:var(--text-muted);font-size:14px}.help-list li{padding:4px 0}.operators-intro{color:var(--text-muted);font-size:14px;margin-bottom:16px}.operators-intro code{color:var(--text-code);background:var(--bg-hover);padding:1px 5px;border-radius:3px;font-size:13px}.operators-list{display:flex;flex-direction:column;gap:12px}.op-card{border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;transition:border-color var(--transition)}.op-header{display:flex;align-items:baseline;gap:10px;padding:10px 14px;background:var(--bg-section-header)}.op-name{font-size:15px;font-weight:700;color:var(--accent);white-space:nowrap}.op-fullname{font-size:13px;font-weight:600;color:var(--text);white-space:nowrap}.op-badge{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:var(--accent);border:1px solid var(--accent);border-radius:999px;padding:1px 6px;white-space:nowrap}.op-desc{font-size:13px;color:var(--text-muted)}.op-desc code{color:var(--text-code);background:var(--bg-hover);padding:1px 4px;border-radius:3px}.op-desc a{color:var(--accent)}.op-body{padding:10px 14px}.compat-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;margin-bottom:10px}.compat-cell{text-align:center;font-size:11px;padding:4px 0;border-radius:4px;background:var(--bg-hover)}.compat-cell .engine-label{display:block;font-weight:600;margin-bottom:2px;color:var(--text-muted);font-size:10px;text-transform:uppercase;letter-spacing:.5px}.compat-yes{color:#22c55e}.compat-no{color:#ef4444}.compat-partial{color:#f59e0b}.op-example{display:flex;align-items:center;gap:10px;margin-bottom:6px;font-size:13px}.op-example-code{padding:5px 10px;border:1px solid var(--border);border-radius:4px;font-family:SF Mono,Fira Code,monospace;font-size:12px;white-space:nowrap;background:var(--bg-input);color:var(--text)}.op-example-explain{color:var(--text-muted)}.op-example-explain code{color:var(--text-code);background:var(--bg-hover);padding:1px 4px;border-radius:3px;font-size:12px}.op-note{font-size:12px;color:var(--text-muted);margin-top:4px;padding-left:4px}.op-note code{color:var(--text-code);background:var(--bg-hover);padding:1px 4px;border-radius:3px}.op-note a{color:var(--accent)}.note-engine-no{color:#ef4444;font-weight:600}.note-engine-partial{color:#f59e0b;font-weight:600}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);padding:10px 24px;border-radius:var(--radius);background:#ef4444;color:#fff;font-size:14px;font-weight:500;box-shadow:var(--shadow-lg);z-index:1000;opacity:0;transition:opacity .3s ease}.toast.visible{opacity:1}.footer{display:flex;justify-content:center;margin-top:32px;padding:16px 0}.github-icon{width:28px;height:28px;opacity:.5;filter:invert(var(--github-invert));transition:opacity var(--transition),filter var(--transition)}.github-icon:hover{opacity:.8}@media(max-width:500px){.search-bar{flex-direction:column}.search-btn{width:100%}.compat-grid{grid-template-columns:repeat(3,1fr)}.op-header{flex-direction:column;gap:4px}}