Exemple d'animation CSS : chargement et effets de texte

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Exemple d'animation CSS : chargement et effets de texte

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HTML

```html
<!DOCTYPE html>
<html lang="pt-BR">
<head>
    <style>
        /* Fundação CSS */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

body {
            background:url("https://vinixodin.com/thumb.jpg") no-repeat center center;
            background-color: black;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100vh;
            overflow: hidden;
        }

/* Código snippet */
        .codigo {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            background: #272822;
            color: #F8F8F2;
            font-family: 'Consolas', 'Monaco', monospace;
            font-size: 18px;
            padding: 20px;
            border-radius: 8px;
            white-space: pre-line;
            text-align: left;
            line-height: 1.6;
            max-height: 25%;
            max-width: 75%;
            width: 75%;
            height: 25%;
            top:15%;
            overflow-y: hidden;
            box-shadow: -8px 10px 18px rgba(0, 0, 0, 0.55);
        }

.selector       { color: #F92672; }
        .property       { color: #66D9EF; }
        .value-number   { color: #AE81FF; }
        .value-string   { color: #E6DB74; }
        .value-color    { color: #A6E22E; }
        .function       { color: #A6E22E; }

/* Exemplo de elemento de código */
        .loading-element {
            border-radius: 50%;
            animation: loading-animation 1s linear infinite;
        }

/* Contêiner da animação */
        .animation-container {
            position: absolute;
            top: 75%;
            left: 50%;
            transform: translate(-50%, -50%);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            height: 50%;
            overflow: hidden;
            background: transparent;
        }

/* Camadas da animação */
        .animation-container::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(90deg, #00b6a9, #00a1c1);
            animation: ripple 2s forwards;
            opacity: 0;
        }

@keyframes ripple {
            0% {
                opacity: 0;
                transform: scale(0);
            }
            100% {
                opacity: 1;
                transform: scale(1.5);
            }
        }

/* Elemento de texto animado */
        .animation-container::first-child {
            font-size: 48px;
            font-weight: bold;
            color: #fff;
            background-color: rgba(0, 0, 0, 0.5);
            border-radius: 10px;
            padding: 20px;
            animation: fade-in 1s forwards;
        }

@keyframes fade-in {
            0% {
                opacity: 0;
                transform: scale(0);
            }
            100% {
                opacity: 1;
                transform: scale(1);
            }
        }

/* Elementos do fundo da animação */
        .animation-container::nth-child(3) {
            position: absolute;
            top: 0;
            left: 0;
            width: 50%;
            height: 100%;
            background-color: rgba(255, 255, 255, 0.2);
            animation: slide-in 2s infinite;
        }

.animation-container::nth-child(4) {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 100px;
            background-color: rgba(255, 255, 255, 0.3);
            animation: slide-in 2s infinite;
        }

@keyframes slide-in {
            0% {
                transform: translateX(-100%);
            }
            50% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(100%);
            }
        }

/* Elementos que apenas aparecem na segunda execução da animação */
        .animation-container::nth-child(5) {
            position: absolute;
            top: 50%;
            right: 0;
            width: 50px;
            height: 50px;
            background-color: rgba(255, 0, 0, 0.5);
            animation: pulse 1s infinite;
            opacity: 0;
        }

@keyframes pulse {
            0% {
                background-color: rgba(255, 0, 0, 0);
            }
            50% {
                background-color: rgba(255, 0, 0, 0.5);
            }
            100% {
                background-color: rgba(255, 0, 0, 0);
            }
        }

.animation-container::nth-child(6) {
            position: absolute;
            top: 25%;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 20px;
            background-color: rgba(0, 255, 0, 0.5);
            animation: shift 1s infinite;
        }

@keyframes shift {
            0% {
                transform: translateX(-100%);
            }
            50% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(100%);
            }
        }

/* Controle de layout na execução da animação */
        .animation-container::nth-child(7) {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 255, 0.2);
            animation: rotate 2s infinite;
        }

@keyframes rotate {
            0% {
                transform: rotate(0deg);
            }
            50% {
                transform: rotate(360deg);
            }
            100% {
                transform: rotate(720deg);
            }
        }

/* Adicionando um micro-detale que apenas aparece na segunda execução da animação */
        .animation-container::nth-child(8) {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50px;
            height: 50px;
            background-color: rgba(0, 0, 0, 0.5);
            animation: blink 1s infinite;
            opacity: 0;
        }

@keyframes blink {
            0% {
                opacity: 0;
            }
            50% {
                opacity: 1;
            }
            100% {
                opacity: 0;
            }
        }

/* Adicionando um micro-detale que apenas aparece na segunda execução da animação */
        .animation-container::nth-child(9) {
            position: absolute;
            top: 25%;
            left: 50%;
            transform: translate(-50%);
            width: 50px;
            height: 50px;
            background-color: rgba(255, 255, 255, 0.5);
            animation: pulse 1s infinite;
            opacity: 0;
        }

@keyframes pulse {
            0% {
                background-color: rgba(255, 255, 255, 0);
            }
            50% {
                background-color: rgba(255, 255, 255, 0.5);
            }
            100% {
                background-color: rgba(255, 255, 255, 0);
            }
        }

/* Adicionando um micro-detale que apenas aparece na segunda execução da animação */
        .animation-container::nth-child(10) {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 50px;
            background-color: rgba(0, 255, 255, 0.5);
            animation: shift 1s infinite;
            opacity: 0;
        }

/* Definindo as animações principais do exemplo */
        @keyframes loading-animation {
            0% {
                transform: scale(0);
            }
            50% {
                transform: scale(1);
            }
            100% {
                transform: scale(0);
            }
        }

.animation-container::nth-child(11) {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 50px;
            height: 50px;
            background-color: rgba(255, 0, 0, 0.5);
            animation: pulse 1s infinite;
            opacity: 0;
        }

.animation-container::nth-child(12) {
            position: absolute;
            top: 25%;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 50px;
            background-color: rgba(0, 255, 0, 0.5);
            animation: shift 1s infinite;
            opacity: 0;
        }

/* Código snippet */

</style>
</head>
<body>
    <div class="animation-container">
        <div class="animation-container::before"></div>
        <div class="animation-container::first-child">EXEMPLO DE TEXTO ANIMADO</div>
        <div class="animation-container::nth-child(3)"></div>
        <div class="animation-container::nth-child(4)"></div>
        <div class="animation-container::nth-child(5)"></div>
        <div class="animation-container::nth-child(6)"></div>
        <div class="animation-container::nth-child(7)"></div>
        <div class="animation-container::nth-child(8)"></div>
        <div class="animation-container::nth-child(9)"></div>
        <div class="animation-container::nth-child(10)"></div>
        <div class="animation-container::nth-child(11)"></div>
        <div class="animation-container::nth-child(12)"></div>
    </div>
</body>
</html>
```

CSS

/* 
  Base foundation
*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background:url("./thumb.jpg") no-repeat center center;
  background-color: black;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  aspect-ratio: 9/16;
}

.codigo {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: #272822;
  color: #F8F8F2;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 18px;
  padding: 20px;
  border-radius: 8px;
  white-space: pre-line;
  text-align: left;
  line-height: 1.6;
  max-height: 25%;
  max-width: 75%;
  width: 75%;
  height: 25%;
  top:15%;
  overflow-y: hidden;
  box-shadow: -8px 10px 18px rgba(0, 0, 0, 0.55);
}

.selector       { color: #F92672; }
.property       { color: #66D9EF; }
.value-number   { color: #AE81FF; }
.value-string   { color: #E6DB74; }
.value-color    { color: #A6E22E; }
.function       { color: #A6E22E; }

.animation-container {
  position: absolute;
  top: 75%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 50%;
  overflow: hidden;
  background: transparent;
  aspect-ratio: 9/16;
}

/* 
  Layers e motivação emocional
*/
.loading-element {
  background-color: #333333;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  animation: loading-animation 1s linear infinite;
  position: relative;
}

@keyframes loading-animation {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1);
  }
}

.layer1 {
  width: 100%;
  height: 100%;
  background-color: #4D4D4D;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 1s;
}

.layer1::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #3F3F3F;
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

/* 
  Micro-detalhes para o replay value
*/
.layer2 {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: #3F3F3F;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: detalhe 2s linear infinite;
}

@keyframes detalhe {
  50% {
    transform: scale(1);
    background-color: #666666;
  }
  100% {
    transform: scale(0);
    background-color: #3F3F3F;
  }
}

/* 
  Interações entre camadas e elementos
*/
.layer3 {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: #2F2F2F;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: interacao 2s linear infinite;
}

@keyframes interacao {
  50% {
    transform: scale(1);
    background-color: #777777;
  }
  100% {
    transform: scale(0);
    background-color: #2F2F2F;
  }
}