Mesh Gradient Dark Blue Clean

:root {
  --mesh-bg: #030712;
  --mesh-bg-blue: #07111f;
  --mesh-shell: rgba(7, 13, 25, 0.82);
  --mesh-shell-inner: rgba(4, 9, 18, 0.72);
  --mesh-line: rgba(191, 219, 254, 0.14);
  --mesh-line-strong: rgba(226, 232, 240, 0.28);
  --mesh-text: #f8fafc;
  --mesh-copy: #9fb2ca;
  --mesh-muted: #64748b;
  --mesh-accent: #dbeafe;
  --mesh-cobalt: #1d4ed8;
  --mesh-indigo: #312e81;
  --mesh-steel: #385a7c;
}

.mesh-page {
  min-height: 100vh;
  color: var(--mesh-text);
  background:
    radial-gradient(circle at 50% 0%, rgba(29, 78, 216, 0.18), transparent 34rem),
    linear-gradient(180deg, var(--mesh-bg-blue), var(--mesh-bg) 48%, #01030a);
}

.mesh-page::selection {
  color: #020617;
  background: var(--mesh-accent);
}

.mesh-shell {
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 32px;
  background:
    linear-gradient(var(--mesh-shell), var(--mesh-shell)) padding-box,
    linear-gradient(145deg, rgba(255, 255, 255, 0.46), rgba(147, 197, 253, 0.18), rgba(255, 255, 255, 0.04)) border-box;
  box-shadow:
    0 40px 100px rgba(0, 0, 0, 0.42),
    inset 0 1px 0 rgba(255, 255, 255, 0.10);
}

.mesh-shell__field {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.78;
  pointer-events: none;
}

.mesh-shell__content {
  position: relative;
  z-index: 2;
  min-height: clamp(560px, 72vh, 820px);
  padding: clamp(28px, 6vw, 84px);
  background:
    linear-gradient(180deg, rgba(4, 9, 18, 0.22), rgba(4, 9, 18, 0.62)),
    var(--mesh-shell-inner);
}

<section class="mesh-shell">
  <canvas class="mesh-shell__field" data-dark-blue-mesh></canvas>
  <div class="mesh-shell__content">
    <nav class="mesh-nav">...</nav>
    <h1>Infrastructure for intelligent interfaces.</h1>
    <p>...</p>
  </div>
</section>

function initDarkBlueMesh(canvas) {
  const ctx = canvas.getContext("2d");
  const reduceMotion = window.matchMedia("(prefers-reduced-motion: reduce)").matches;
  let width = 0;
  let height = 0;
  let frame = 0;
  let rafId = 0;

  const points = [
    { x: 0.18, y: 0.30, r: 0.45, color: "rgba(29, 78, 216, 0.55)" },
    { x: 0.68, y: 0.22, r: 0.38, color: "rgba(49, 46, 129, 0.58)" },
    { x: 0.78, y: 0.72, r: 0.52, color: "rgba(56, 90, 124, 0.48)" },
    { x: 0.42, y: 0.58, r: 0.34, color: "rgba(219, 234, 254, 0.18)" },
  ];

  function resize() {
    const rect = canvas.getBoundingClientRect();
    const dpr = Math.min(window.devicePixelRatio || 1, 1.5);
    width = Math.max(1, rect.width);
    height = Math.max(1, rect.height);
    canvas.width = Math.floor(width * dpr);
    canvas.height = Math.floor(height * dpr);
    ctx.setTransform(dpr, 0, 0, dpr, 0, 0);
  }

  function draw(time = 0) {
    ctx.clearRect(0, 0, width, height);
    ctx.fillStyle = "#030712";
    ctx.fillRect(0, 0, width, height);
    ctx.globalCompositeOperation = "screen";

    points.forEach((point, index) => {
      const drift = reduceMotion ? 0 : Math.sin(time * 0.00018 + index) * 24;
      const x = point.x * width + drift;
      const y = point.y * height + Math.cos(time * 0.00016 + index) * 18;
      const radius = Math.max(width, height) * point.r;
      const gradient = ctx.createRadialGradient(x, y, 0, x, y, radius);
      gradient.addColorStop(0, point.color);
      gradient.addColorStop(1, "rgba(3, 7, 18, 0)");
      ctx.fillStyle = gradient;
      ctx.fillRect(0, 0, width, height);
    });

    ctx.globalCompositeOperation = "source-over";
    ctx.fillStyle = "rgba(255, 255, 255, 0.035)";
    for (let y = (frame % 28); y < height; y += 28) {
      ctx.fillRect(0, y, width, 1);
    }

    frame += 1;
    if (!reduceMotion) rafId = requestAnimationFrame(draw);
  }

  function handleResize() {
    cancelAnimationFrame(rafId);
    resize();
    draw();
  }

  resize();
  draw();
  window.addEventListener("resize", handleResize);

  return () => {
    cancelAnimationFrame(rafId);
    window.removeEventListener("resize", handleResize);
  };
}

.mesh-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  padding: 6px;
  border: 1px solid transparent;
  border-radius: 999px;
  background:
    linear-gradient(rgba(5, 12, 24, 0.76), rgba(5, 12, 24, 0.76)) padding-box,
    linear-gradient(120deg, rgba(255, 255, 255, 0.28), rgba(96, 165, 250, 0.16), rgba(255, 255, 255, 0.04)) border-box;
  backdrop-filter: blur(18px);
}

.mesh-nav a {
  color: var(--mesh-copy);
  border-radius: 999px;
  padding: 9px 14px;
  text-decoration: none;
}

.mesh-nav a:hover,
.mesh-nav a[aria-current="page"] {
  color: var(--mesh-text);
  background: rgba(255, 255, 255, 0.08);
}

.mesh-node {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(191, 219, 254, 0.18);
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--mesh-copy);
  background: rgba(5, 12, 24, 0.58);
  backdrop-filter: blur(14px);
  font-size: 12px;
}

.mesh-node::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #bfdbfe;
  box-shadow: 0 0 18px rgba(147, 197, 253, 0.72);
}

.mesh-rail {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--mesh-line), transparent);
}

.mesh-corner {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--mesh-line-strong);
}

.mesh-cta-primary {
  color: #020617;
  background: #f8fafc;
  box-shadow: 0 16px 36px rgba(219, 234, 254, 0.18);
}

.mesh-cta-secondary {
  color: var(--mesh-text);
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(5, 12, 24, 0.62), rgba(5, 12, 24, 0.62)) padding-box,
    linear-gradient(135deg, rgba(255, 255, 255, 0.28), rgba(96, 165, 250, 0.12), rgba(255, 255, 255, 0.04)) border-box;
}