@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@400;700&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Noto Serif JP", serif;
}

html, body {
  display: flex;
  flex-direction: column;
  justify-content: stretch;
  height: 100%;
  background-color: #f4f1ec;
  background-image: url("https://www.transparenttextures.com/patterns/asfalt-dark.png");
  color: #2f2f2f;
  padding: 0 16px;
}

header {
  position: relative;
  background-image: url('https://upload.wikimedia.org/wikipedia/commons/thumb/f/f5/Japanese_wave_pattern.svg/1024px-Japanese_wave_pattern.svg.png');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center;
  padding: 40px 20px;
  text-align: center;
  border-bottom: 4px solid #ffcfcf;
  flex: 0 0 auto;
  color: #fff;
  font-family: 'Noto Serif JP', serif;
  overflow: hidden;
}

header h1 {
  position: relative;
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin: 0;
  z-index: 1;
}

.navbar-mainbg {
  background-color: #a06a3c;
  border-bottom: 2px solid #d4af7f;
}

#navbarSupportedContent ul li a {
  color: #fefefe;
  font-size: 16px;
  padding: 15px 25px;
  text-transform: uppercase;
  transition: 0.4s;
}

#navbarSupportedContent ul li a:hover {
  background-color: #0d6efd;
  color: #2f2f2f;
}

.note {
  background: #fff;
  border: 1px solid #0d6efd;
  border-radius: 10px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  padding: 15px;
  width: 240px;
  margin: 20px;
  float: left;
}

form.create-note {
  background: #fff;
  border: 1px solid #0d6efd;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  width: 500px;
  margin: 40px auto;
  position: relative;
}

form.create-note input,
form.create-note textarea {
  background: transparent;
  border: 1px solid #0d6efd;
  padding: 8px;
  font-size: 1.1em;
  color: #2f2f2f;
}

form.create-note button {
  background: #0d6efd;
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  position: absolute;
  right: 15px;
  bottom: -20px;
  cursor: pointer;
  font-weight: bold;
}

main {
  flex: 1 0 auto;
  padding: 40px 20px;
  text-align: center;
}

h1, h2, h3, h4, h5 {
  font-family: "Noto Serif JP", serif;
  color: #2f2f2f;
}

p {
  color: #333;
  line-height: 1.8;
  font-size: 17px;
}

.profile {
  border: 2px solid #ffcfcf;
  border-radius: 50%;
  object-fit: cover;
  width: 280px;
  height: 280px;
}

.feedback-input {
  background-color: transparent;
  border: 2px solid #a06a3c;
  color: #2f2f2f;
  padding: 12px;
  font-size: 18px;
}

.feedback-input:focus {
  border-color: #d4af7f;
  outline: none;
}

[type="submit"] {
  background: #a06a3c;
  color: white;
  font-size: 18px;
  padding: 12px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

[type="submit"]:hover {
  background: #d4af7f;
}