body {
  margin: 0;
  font-family: "Hiragino Maru Gothic ProN", "Yu Gothic", sans-serif;
  background: #fff7e8;
  color: #5a3b24;
}

.container {
  max-width: 520px;
  margin: 0 auto;
  padding: 32px 20px;
  text-align: center;
}

h1 {
  margin-bottom: 8px;
  font-size: 2rem;
}

.lead {
  line-height: 1.7;
  margin-bottom: 20px;
}

textarea {
  width: 100%;
  height: 180px;
  box-sizing: border-box;
  padding: 14px;
  border: 3px solid #c79a63;
  border-radius: 16px;
  background: #fffdf8;
  color: #5a3b24;
  font-size: 1rem;
  line-height: 1.6;
  resize: vertical;
}

button {
  margin-top: 20px;
  padding: 14px 24px;
  border: none;
  border-radius: 999px;
  background: #b8793a;
  color: white;
  font-size: 1.1rem;
  font-weight: bold;
  box-shadow: 0 5px 0 #805225;
}

button:active {
  transform: translateY(4px);
  box-shadow: 0 1px 0 #805225;
}

.box{
    display:block;
    width:250px;
    max-width:70%;
    margin:30px auto;
    transition:transform .2s;
}

.box.shake {
  animation: shake 0.75s ease-in-out;
  transform-origin: center bottom;
}

@keyframes shake {
  0% {
    transform: translateX(0) translateY(0) rotate(0deg);
  }

  15% {
    transform: translateX(-6px) translateY(-2px) rotate(-4deg);
  }

  30% {
    transform: translateX(6px) translateY(0) rotate(4deg);
  }

  45% {
    transform: translateX(-5px) translateY(-2px) rotate(-3deg);
  }

  60% {
    transform: translateX(5px) translateY(0) rotate(3deg);
  }

  75% {
    transform: translateX(-3px) translateY(-1px) rotate(-2deg);
  }

  90% {
    transform: translateX(3px) translateY(0) rotate(2deg);
  }

  100% {
    transform: translateX(0) translateY(0) rotate(0deg);
  }

}

.result-area {
  margin-top: 20px;
  padding: 20px;
  border-radius: 20px;
  background: #fffdf8;
  border: 2px dashed #c79a63;
}

.result-label {
  margin: 0 0 8px;
  font-weight: bold;
}

.result {
  font-size: 1.8rem;
  font-weight: bold;
  color: #8a4f20;
  min-height: 2.4rem;
}