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22 March 2025

Cuadro de registro de inicio de sesión 3D HTML CSS

HTML

<head>
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <base href=".">
  <title>Journey to 100 Followers</title>
  <link href="https://cdn.jsdelivr.net/npm/@fontsource/press-start-2p@4.5.0/index.min.css" rel="stylesheet">
  <style>
    body {
      margin: 0;
      overflow: hidden;
      background: #000;
      perspective: 1000px;
    }

canvas {
      width: 100vw;
      height: 100vh;
      display: block;
      image-rendering: optimizeSpeed;
      image-rendering: -moz-crisp-edges;
      image-rendering: -webkit-optimize-contrast;
      image-rendering: optimize-contrast;
      image-rendering: pixelated;
      -ms-interpolation-mode: nearest-neighbor;
    }

#counter,
    #thanks {
      position: fixed;
      left: 50%;
      transform: translate(-50%, -50%);
      color: white;
      font-family: 'Press Start 2P', cursive;
      text-align: center;
      pointer-events: none;
      text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
    }

#counter {
      top: 50%;
      font-size: 6em;
      font-weight: bold;
      background: linear-gradient(45deg, #ff3366, #00ffff, #ff8800, #00ff99);
      background-size: 400% 400%;
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      opacity: 0;
      transition: opacity 1s ease-in-out;
      letter-spacing: 4px;
      filter: drop-shadow(0 0 25px rgba(255, 255, 255, 0.7));
      animation: gradient 5s ease infinite, pulse 1.5s ease-in-out infinite;
      transform-origin: center center;
    }

#thanks {
      top: 65%;
      font-size: 1.5em;
      opacity: 0;
      transition: opacity 1s;
      line-height: 1.5;
      letter-spacing: 2px;
      text-transform: uppercase;
      animation: glow 2s ease-in-out infinite alternate;
      white-space: pre;
    }

.ascii-particle {
      position: absolute;
      color: #ff8800;
      font-family: monospace;
      pointer-events: none;
      font-size: 20px;
      text-shadow: 0 0 5px #ff3300, 0 0 10px #ff6600;
      opacity: 0.8;
      transform-style: preserve-3d;
      filter: blur(0.5px);
      animation: particleGlow 2s infinite alternate;
    }

.cursor {
      display: inline-block;
      width: 0.5em;
      height: 1em;
      background: white;
      margin-left: 2px;
      animation: blink 0.7s infinite;
    }

@keyframes glow {
      from {
        text-shadow: 0 0 5px rgba(255, 255, 255, 0.7), 0 0 10px rgba(255, 255, 255, 0.7), 0 0 15px #ff3366, 0 0 20px #ff3366;
      }

to {
        text-shadow: 0 0 10px rgba(255, 255, 255, 0.7), 0 0 20px rgba(255, 255, 255, 0.7), 0 0 30px #00ffff, 0 0 40px #00ffff;
      }
    }

@keyframes pulse {
      0% {
        transform: translate(-50%, -50%) scale(1);
      }

50% {
        transform: translate(-50%, -50%) scale(1.2);
      }

100% {
        transform: translate(-50%, -50%) scale(1);
      }
    }

@keyframes blink {

0%,
      100% {
        opacity: 1;
      }

50% {
        opacity: 0;
      }
    }

@keyframes gradient {
      0% {
        background-size: 400% 400%;
      }

50% {
        background-size: 400% 400%;
      }

100% {
        background-size: 400% 400%;
      }
    }

@keyframes particleGlow {
      from {
        filter: blur(0.5px) brightness(1);
      }

to {
        filter: blur(1px) brightness(1.5);
      }
    }

.show {
      opacity: 1 !important;
      animation: appear 1s ease-out forwards;
    }

@keyframes appear {
      from {
        transform: translate(-50%, -50%) scale(0);
      }

to {
        transform: translate(-50%, -50%) scale(1);
      }
    }

.scanlines {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: repeating-linear-gradient(transparent 0px,
          rgba(0, 0, 0, 0.8) 1px,
          transparent 2px,
          transparent 4px);
      pointer-events: none;
      z-index: 9999;
      animation: flicker 0.08s infinite, colorShift 10s infinite;
      mix-blend-mode: overlay;
      opacity: 0.9;
    }

@keyframes flicker {
      0% {
        opacity: 0.85;
      }

50% {
        opacity: 0.95;
      }

100% {
        opacity: 0.85;
      }
    }

@keyframes colorShift {
      0% {
        mix-blend-mode: overlay;
      }

50% {
        mix-blend-mode: color-dodge;
      }

100% {
        mix-blend-mode: overlay;
      }
    }

#credits {
      position: fixed;
      bottom: 20px;
      right: 20px;
      color: white;
      font-family: 'Press Start 2P', cursive;
      font-size: 0.8em;
      opacity: 0;
      transition: opacity 1s ease-in-out;
      text-shadow: 0 0 5px #fff, 0 0 10px #fff, 0 0 15px #ff3366;
    }

.firework-particle {
      transition: opacity 0.5s ease-out;
      font-size: 30px;
      text-shadow: 0 0 10px currentColor, 0 0 20px currentColor;
    }
  </style>
</head>

float fbm(vec3 p) {
    float value = 0.0;
    float amplitude = 0.5;
    float frequency = 1.0;
    float lacunarity = 2.2;  
    float persistence = 0.55;  
    
    for(int i = 0; i < 8; i++) {  
        value += amplitude * (
            sin(p.x * frequency + time * 0.7) * 
            cos(p.y * frequency + time * 0.5) * 
            sin(p.z * frequency + time * 0.3) *
            sin(length(p) * frequency * 1.5)  
        );
        
        p = abs(p);  
        p.xy = vec2(p.x + p.y, p.y - p.x);  
        p *= 1.3;  
    
        frequency *= lacunarity;
        amplitude *= persistence;
    }
    return value * 0.5;  
  }

float sdSphere(vec3 p, float r) {
    float base = length(p) - r;
    float dist = abs(base);
    if(dist < 0.8) {  
        float fractal = fbm(p * 3.5 + time * 0.4);  
        float pattern = sin(p.x * 15.0 + time) * 
                        cos(p.y * 15.0 + time) * 
                        sin(p.z * 15.0 + time);  
    
        return base - (
            fractal * 0.4 +  
            pattern * 0.2 +  
            sin(length(p) * 10.0) * 0.1  
        ) * (0.8 - dist);
    }
    return base;
  }
  
  float sdTorus(vec3 p, vec2 t) {
    vec2 q = vec2(length(p.xz) - t.x, p.y);
    return length(q) - t.y;
  }

float sdBox(vec3 p, vec3 b) {
    vec3 q = abs(p) - b;
    return length(max(q,0.0)) + min(max(q.x,max(q.y,q.z)),0.0);
  }
  
  vec3 rotateY(vec3 p, float angle) {
    float c = cos(angle);
    float s = sin(angle);
    return vec3(c*p.x - s*p.z, p.y, s*p.x + c*p.z);
  }
  
  vec3 rotateX(vec3 p, float angle) {
    float c = cos(angle);
    float s = sin(angle);
    return vec3(p.x, c*p.y - s*p.z, s*p.y + c*p.z);
  }
  
  float map(vec3 p) {
    p = rotateY(p, time * 0.5);
    p = rotateX(p, sin(time * 0.3) * 0.5);
    
    float ring = sdTorus(p, vec2(4.0 + sin(time) * 0.5, 0.5));
    
    float spheres = MAX_DIST;
    for(int i = 0; i < 16; i++) {
      float angle = float(i) * PI * 2.0 / 16.0 + time;
      vec3 offset = vec3(
        cos(angle) * 4.0,
        sin(time * 2.0 + float(i)) * 0.8,
        sin(angle) * 4.0
      );
      spheres = min(spheres, sdSphere(p - offset, 0.3 + 0.1 * sin(time * 3.0 + float(i))));
    }
    
    vec3 boxPos = p;
    boxPos = rotateY(boxPos, time * 2.0);
    float boxes = sdBox(boxPos, vec3(1.0 + 0.3 * sin(time * 3.0)));
    
    float center = sdSphere(p, 2.0 + sin(time * 2.0) * 0.3);
    
    return min(min(min(ring, spheres), boxes), center) * 0.8;
  }
  
  vec3 calcNormal(vec3 p) {
    vec2 e = vec2(0.001, 0.0);
    return normalize(vec3(
      map(p + e.xyy) - map(p - e.xyy),
      map(p + e.yxy) - map(p - e.yxy),
      map(p + e.yyx) - map(p - e.yyx)
    ));
  }

float softShadow(vec3 ro, vec3 rd, float mint, float maxt, float k) {
    float res = 1.0;
    float ph = 1e20;
    float t = mint;
    
    for(int i = 0; i < 32; i++) {  
      float h = map(ro + rd * t);
      float y = h*h/(2.0*ph);
      float d = sqrt(h*h-y*y);
      res = min(res, k*d/max(0.0,t-y));
      ph = h;
      t += h * 0.5;  
      if(res < 0.001 || t > maxt) break;
    }
    return clamp(res, 0.0, 1.0);
  }

float calcAO(vec3 p, vec3 n) {
    float occ = 0.0;
    float sca = 1.0;
    for(int i = 0; i < 5; i++) {
      float h = 0.01 + 0.12 * float(i)/4.0;
      float d = map(p + h*n);
      occ += (h-d)*sca;
      sca *= 0.95;
      if(occ > 0.35) break;
    }
    return clamp(1.0 - 3.0*occ, 0.0, 1.0);
  }

float raymarch(vec3 ro, vec3 rd) {
    float dO = 0.0;
    
    for(int i = 0; i < MAX_STEPS; i++) {
      vec3 p = ro + rd * dO;
      float dS = map(p);
      dO += dS;
      if(dS < SURF_DIST || dO > MAX_DIST) break;
    }
    
    return dO;
  }

vec3 render(vec3 ro, vec3 rd) {
    float d = raymarch(ro, rd);
    vec3 col = vec3(0.0);
    
    if(d < MAX_DIST) {
        vec3 p = ro + rd * d;
        vec3 n = calcNormal(p);
        vec3 lightPos = vec3(2.0 * sin(time), 4.0, -3.0 * cos(time));
        vec3 l = normalize(lightPos - p);
        vec3 r = reflect(-l, n);
        vec3 h = normalize(l - rd);
        
        float diff = max(0.0, dot(n, l));
        float spec = pow(max(0.0, dot(r, -rd)), 64.0);
        float fresnel = pow(1.0 - max(0.0, dot(n, -rd)), 5.0);
        
        float shadow = softShadow(p, l, 0.02, 2.5, 32.0);
        float ao = calcAO(p, n);
        
        float sphereDist = length(p) - 2.0;
        vec3 baseColor;
        
        if(abs(sphereDist) < 0.5) {
            float pulse = sin(time * 2.0) * 0.5 + 0.5;
            baseColor = mix(
                vec3(1.0, 0.2, 0.8),  
                vec3(0.2, 0.9, 1.0),  
                fbm(p * 5.0 + time * 0.3) * 0.7 + 0.3  
            );
            
            baseColor *= (1.0 + 
                sin(p.x * 10.0) * 0.2 + 
                cos(p.y * 10.0) * 0.2 + 
                sin(p.z * 10.0) * 0.2
            );
            
            baseColor += vec3(0.3, 0.1, 0.4) * pulse;
        } else {
            baseColor = mix(
                vec3(0.2, 0.8, 1.0),
                vec3(1.0, 0.4, 0.1),
                sin(p.x * 2.0 + time) * 0.5 + 0.5
            );
        }
        
        vec3 ambient = baseColor * 0.05;
        vec3 diffuse = baseColor * diff * shadow;
        vec3 specular = vec3(0.8, 0.9, 1.0) * spec * shadow;
        vec3 rim = vec3(0.3, 0.6, 1.0) * fresnel;
        
        col = (ambient + diffuse + specular + rim) * ao;
        
        float fogFactor = 1.0 - exp(-d * 0.08);
        vec3 fogColor = mix(
            vec3(0.1, 0.2, 0.3),
            vec3(0.2, 0.3, 0.4),
            sin(time * 0.5) * 0.5 + 0.5
        );
        col = mix(col, fogColor, fogFactor);
    }
    
    float glowIntensity = sin(progress * PI * 2.0) * 0.3;
    col += vec3(0.1, 0.2, 0.3) * glowIntensity;
    
    col = col / (1.0 + col);
    col = pow(col, vec3(0.4545));
    col = mix(col, col * (1.0 + sin(time * 0.5) * 0.1), 0.2);
    
    return col;
  }

void main() {
    vec2 uv = (gl_FragCoord.xy - 0.5 * resolution.xy) / resolution.y;
    
    vec3 ro = vec3(0.0, 0.0, 8.0 + sin(time * 0.5));
    vec3 rd = normalize(vec3(uv, -1.0));
    
    vec3 col = render(ro, rd);
    
    gl_FragColor = vec4(col, 1.0);
  }
`;
    let gl;
    let program;
    let time;
    let timeLocation;
    let resolutionLocation;
    let progressLocation;
    let startTime;
    let animationDuration = 8000;
    let particleSystem;
    let shadersReady = false;
    let counterDelay = 3000;

</html>

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