#background-effects{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:2;overflow:hidden;background:0 0;user-select:none;-webkit-user-select:none}.watermark{position:absolute;top:38.2%;left:50%;transform:translate(-50%,-50%);font-size:100px;font-weight:700;font-family:var(--font-sans);color:var(--text);opacity:.08;user-select:none;white-space:nowrap;letter-spacing:8px}[data-theme=light] .watermark{opacity:.06}#intro-page{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:var(--text);pointer-events:none;opacity:1;transition:opacity .6s var(--ease-out);width:90%;max-width:600px}#intro-page.hidden{opacity:0;pointer-events:none}.intro-title{font-size:48px;font-weight:700;margin-bottom:var(--space-3);letter-spacing:1px;color:var(--text)}.intro-subtitle{font-size:var(--text-lg);color:var(--text-secondary);margin-bottom:var(--space-6);font-weight:400}.intro-divider{width:32px;height:1px;background:var(--border);margin:var(--space-5) auto}.intro-philosophy{font-size:var(--text-lg);font-weight:500;margin-bottom:var(--space-5);letter-spacing:3px;color:var(--accent)}.intro-features{font-size:var(--text-base);color:var(--text-secondary);line-height:1.8;margin-bottom:var(--space-5)}.intro-hint{font-size:var(--text-base);color:var(--text-muted)}.watermark.intro-visible{opacity:0}@media (max-width:768px){.watermark{font-size:48px;letter-spacing:6px}.intro-title{font-size:36px}.intro-subtitle{font-size:var(--text-md)}.intro-philosophy{font-size:var(--text-md);letter-spacing:2px}.intro-features,.intro-hint{font-size:var(--text-sm)}}@media (max-width:480px){.intro-title{font-size:28px}.intro-subtitle{font-size:var(--text-base);margin-bottom:var(--space-4)}.intro-philosophy{font-size:var(--text-base);letter-spacing:1px;margin-bottom:var(--space-4)}.intro-features{font-size:var(--text-sm);line-height:1.6;margin-bottom:var(--space-4)}.intro-hint{font-size:var(--text-xs)}.intro-divider{margin:var(--space-4) auto}}@media (min-width:1200px){.intro-title{font-size:56px}.intro-philosophy,.intro-subtitle{font-size:var(--text-xl)}.intro-features{font-size:var(--text-md)}}