:root{--bg: #f5f7fb;--card-bg: #ffffff;--card-bg-hover: #fbfbff;--border: rgba(15, 23, 42, .1);--text: #0f172a;--muted: #5b6577;--accent: #4f46e5;--accent-2: #06b6d4;--accent-contrast: #ffffff;--media-bg: #eef1f8;--tag-bg: rgba(79, 70, 229, .07);--tag-border: rgba(79, 70, 229, .22);--nav-bg: rgba(245, 247, 251, .75);--shadow: rgba(30, 41, 59, .12);--gradient: linear-gradient(135deg, var(--accent), var(--accent-2));--font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:var(--font-body)}.bg-canvas-host{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;pointer-events:none}.bg-canvas-host 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var(--border);background:var(--bg);color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem}.chat-send{background:var(--accent);border-color:var(--accent);color:#fff}.chat-input-row textarea:disabled,.chat-attach:disabled,.chat-send:disabled{opacity:.5;cursor:not-allowed}