body {
  box-sizing: border-box;
  font-family: Arial;
  background: #f7f7f7;
  color: #222;
  margin: 0;
  min-height: 100vh;
  padding: 24px;
  text-align: center;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

.container {
  background: white;
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.08);
  margin: 40px auto;
  max-width: 640px;
  padding: 32px;
  width: 100%;
}

h1 {
  font-size: clamp(2rem, 8vw, 3rem);
  line-height: 1.1;
  margin: 0 0 24px;
}

#puzzle {
  font-size: clamp(1.25rem, 5vw, 1.75rem);
  line-height: 1.35;
  margin: 0 auto 24px;
  max-width: 520px;
}

.intro {
  font-size: clamp(1rem, 4vw, 1.2rem);
  max-width: 520px;
  margin: 20px auto;
  line-height: 1.5;
}

.final-steps {
  display: inline-block;
  font-size: clamp(1rem, 4vw, 1.2rem);
  line-height: 1.6;
  margin: 8px auto 0;
  max-width: 520px;
  padding-left: 24px;
  text-align: left;
}

.final-riddle {
  background: #f7f0df;
  border-radius: 14px;
  font-size: clamp(1.1rem, 4vw, 1.35rem);
  line-height: 1.5;
  margin: 24px auto;
  max-width: 520px;
  padding: 18px;
}

.final-steps li {
  margin-bottom: 10px;
}

.answer-row {
  display: flex;
  gap: 10px;
  margin: 0 auto 8px;
  max-width: 460px;
}

input {
  border: 1px solid #ccc;
  border-radius: 10px;
  flex: 1;
  min-width: 0;
  padding: 10px;
  font-size: 16px;
}

button {
  background: #222;
  border: 0;
  border-radius: 10px;
  color: white;
  cursor: pointer;
  font-size: 16px;
  min-height: 44px;
  margin: 5px;
  padding: 10px 16px;
  touch-action: manipulation;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

input:focus-visible,
button:focus-visible,
#finalTitle:focus-visible {
  outline: 3px solid #d49b00;
  outline-offset: 3px;
}

#result,
#code {
  min-height: 1.5em;
}

@media (max-width: 520px) {
  body {
    padding: 16px;
  }

  .container {
    margin: 16px auto;
    padding: 24px 18px;
  }

  .answer-row {
    display: block;
  }

  input,
  button {
    width: 100%;
  }

  button {
    margin: 6px 0;
  }
}