Add creative Hola Mundo with particles, glitch effect and typewriter

- index.html: structure linking external CSS and JS
- style.css: futuristic dark theme with glitch animation and scanlines
- main.js: canvas particle field, typewriter loop, live uptime counter

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

style.css

@@ -0,0 +1,125 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  background: #0a0a0f;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  min-height: 100vh;
+  font-family: 'Courier New', monospace;
+  overflow: hidden;
+}
+
+canvas {
+  position: fixed;
+  top: 0;
+  left: 0;
+  z-index: 0;
+}
+
+.container {
+  position: relative;
+  z-index: 1;
+  text-align: center;
+}
+
+.glitch {
+  font-size: clamp(3rem, 10vw, 8rem);
+  font-weight: 900;
+  color: #fff;
+  text-transform: uppercase;
+  letter-spacing: 0.1em;
+  position: relative;
+  animation: glitch-main 3s infinite;
+}
+
+.glitch::before,
+.glitch::after {
+  content: attr(data-text);
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+}
+
+.glitch::before {
+  color: #0ff;
+  animation: glitch-before 3s infinite;
+  clip-path: polygon(0 30%, 100% 30%, 100% 50%, 0 50%);
+}
+
+.glitch::after {
+  color: #f0f;
+  animation: glitch-after 3s infinite;
+  clip-path: polygon(0 60%, 100% 60%, 100% 80%, 0 80%);
+}
+
+@keyframes glitch-main {
+  0%, 90%, 100% { transform: translate(0); }
+  92%           { transform: translate(-2px, 1px); }
+  94%           { transform: translate(2px, -1px); }
+  96%           { transform: translate(-1px, 2px); }
+}
+
+@keyframes glitch-before {
+  0%, 90%, 100% { transform: translate(0); opacity: 0; }
+  91%           { transform: translate(-4px, 0); opacity: 0.8; }
+  93%           { transform: translate(4px, 0); opacity: 0.8; }
+  95%           { opacity: 0; }
+}
+
+@keyframes glitch-after {
+  0%, 90%, 100% { transform: translate(0); opacity: 0; }
+  92%           { transform: translate(4px, 0); opacity: 0.8; }
+  94%           { transform: translate(-4px, 0); opacity: 0.8; }
+  96%           { opacity: 0; }
+}
+
+.subtitle {
+  margin-top: 1rem;
+  font-size: clamp(0.8rem, 2vw, 1.2rem);
+  color: #0ff;
+  letter-spacing: 0.5em;
+  text-transform: uppercase;
+  opacity: 0;
+  animation: fade-in 1s ease forwards 0.5s;
+}
+
+.counter {
+  margin-top: 2rem;
+  font-size: 0.85rem;
+  color: #444;
+  letter-spacing: 0.3em;
+  animation: fade-in 1s ease forwards 1s;
+  opacity: 0;
+}
+
+#typed {
+  color: #0f0;
+}
+
+@keyframes fade-in {
+  to { opacity: 1; }
+}
+
+.scanline {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: repeating-linear-gradient(
+    to bottom,
+    transparent 0px,
+    transparent 3px,
+    rgba(0, 0, 0, 0.08) 3px,
+    rgba(0, 0, 0, 0.08) 4px
+  );
+  pointer-events: none;
+  z-index: 2;
+}