// NextXus Federation — Cognitive Circuitry License
// Animation: The Data Rain
// License: Token Bundle (https://keywebster.gumroad.com/l/olhsf)
// Own the marrow.

            (function () {
                "use strict";
                var canvas = document.getElementById("canvas-zeta");
                var ctx = canvas.getContext("2d");
                var stage = canvas.parentElement;
                var reduced = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
                var NCOLS = 52, GAP = 14, FLASH_CHARS = ["0", "1", "\u03B5", "\u0394", "\u03A9"];
                var cols = [], running = false, rafId = null;
                function makeCol(x, anyY) {
                    return {
                        x: x,
                        y: anyY ? Math.random() * canvas.height : -Math.random() * canvas.height * 0.5,
                        speed: 1.5 + Math.random() * 2.5,
                        len: 5 + ((Math.random() * 4) | 0),
                        gold: Math.random() < 0.15,
                        flash: 0,
                        ch: "0"
                    };
                }
                function resize() { canvas.width = stage.clientWidth; canvas.height = stage.clientHeight; }
                function seed() {
                    cols = [];
                    var spacing = canvas.width / NCOLS;
                    for (var i = 0; i < NCOLS; i++) {
                        cols.push(makeCol(spacing * i + spacing / 2, true));
                    }
                }
                function step() {
                    var h = canvas.height;
                    for (var i = 0; i < cols.length; i++) {
                        var c = cols[i];
                        c.y += c.speed;
                        if (c.flash > 0.04) c.flash *= 0.9; else c.flash = 0;
                        if (c.flash === 0 && Math.random() < 0.012) {
                            c.flash = 1;
                            c.ch = FLASH_CHARS[(Math.random() * FLASH_CHARS.length) | 0];
                        }
                        if (c.y - c.len * GAP > h) {
                            cols[i] = makeCol(c.x, false);
                        }
                    }
                }
                function draw() {
                    var w = canvas.width, h = canvas.height, i, t;
                    ctx.fillStyle = "#0a0a0f";
                    ctx.fillRect(0, 0, w, h);
                    ctx.font = "14px monospace";
                    ctx.textAlign = "center";
                    for (i = 0; i < cols.length; i++) {
                        var c = cols[i];
                        for (t = 0; t < c.len; t++) {
                            var ty = c.y - t * GAP;
                            if (ty < -GAP || ty > h + GAP) continue;
                            var a = (1 - t / c.len) * (t === 0 ? 1 : 0.65);
                            if (t === 0) {
                                ctx.fillStyle = c.gold ? "rgba(255,233,138," + a.toFixed(3) + ")"
                                    : "rgba(174,244,255," + a.toFixed(3) + ")";
                            } else {
                                ctx.fillStyle = c.gold ? "rgba(255,215,0," + a.toFixed(3) + ")"
                                    : "rgba(6,182,212," + a.toFixed(3) + ")";
                            }
                            if (t === 0 && c.flash > 0.04) {
                                ctx.fillText(c.ch, c.x, ty);
                            } else {
                                ctx.fillRect(c.x - 1, ty - 8, 2, t === 0 ? 10 : 7);
                            }
                        }
                    }
                }
                function warm() { for (var s = 0; s < 20; s++) step(); }
                function loop() {
                    if (!running) return;
                    step();
                    draw();
                    rafId = requestAnimationFrame(loop);
                }
                function start() {
                    if (running || reduced) return;
                    running = true;
                    rafId = requestAnimationFrame(loop);
                }
                function stop() {
                    running = false;
                    if (rafId) cancelAnimationFrame(rafId);
                }
                window.addEventListener("resize", function () { resize(); seed(); warm(); draw(); });
                resize(); seed(); warm(); draw();
                if (!reduced) {
                    if ("IntersectionObserver" in window) {
                        new IntersectionObserver(function (entries) {
                            entries.forEach(function (e) { if (e.isIntersecting) start(); else stop(); });
                        }).observe(canvas);
                    } else {
                        start();
                    }
                }
            })();