:root {
  --primary-color: #2196f3;
  --primary-light: rgba(33, 150, 243, 0.1);
  --text-dark: #212121;
  --text-light: #757575;
  --background: #f5f5f5;
  --card-bg: #ffffff;
  --accent: #ff5722;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans",
    "Helvetica Neue", sans-serif;
}
.audio-examples {
  margin-top: 16px;
  padding: 10px;
  background-color: rgba(0, 0, 0, 0.03);
  border-radius: 8px;}

.audio-examples h5 {
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: #555;
  padding-left: 8px;
}

.audio-player {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
  padding: 6px;
  border-radius: 6px;
  background-color: #f9f9f9;
}

.audio-player:last-child {
  margin-bottom: 0;
}

.audio-player audio {
  flex: 1;
  height: 30px;
}

.audio-player span {
  font-size: 0.85rem;
  font-weight: 500;
  color: #666;
  min-width: 80px;
  text-align: center;
}

audio {
  border-radius: 20px;
}

body {
  background-color: var(--background);
  color: var(--text-dark);
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.header {
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.logos {
  display: flex;
  align-items: center;
  gap: 20px;
}

.logos img {
  max-height: 60px;
  object-fit: contain;
}

.content {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  padding: 40px 0;
}

.left-section {
  flex: 2;
  min-width: 300px;
}

.form-container {
  flex: 1;
  text-align: justify;
  min-width: 300px;
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--primary-color);
  letter-spacing: 0.5px;
}

h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--text-dark);
}

h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--primary-color);
}

.video-container {
  width: 100%;
  margin-bottom: 30px;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  padding-top: 56.25%; /* 16:9 Aspect Ratio */
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.about-research {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 30px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.about-research p {
  margin-bottom: 16px;
  text-align: justify;
}

.objective {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 30px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.vocalization-types {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.type-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  padding-bottom: 20px;
}

.type-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.type-card h4 {
  color: var(--primary-color);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.type-card h4 i {
  font-size: 20px;
}

.type-card p {
  font-size: 13px;
  color: var(--text-light);
  text-align: justify;
}

form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

input,
select {
  padding: 12px 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 16px;
  outline: none;
  transition: border-color 0.3s;
}

input:focus,
select:focus {
  border-color: var(--primary-color);
}

label {
  font-size: 16px;
  color: var(--text-dark);
  margin-bottom: -8px;
}

button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 14px 20px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s;
  margin-top: 8px;
}

button:hover {
  background-color: #0d81df;
}

.image-container {
  margin: 20px 0;
  border-radius: 12px;
  overflow: hidden;
}

.image-container img {
  width: 100%;
  display: block;
}

footer {
  background-color: var(--text-dark);
  color: white;
  padding: 40px 20px;
  text-align: center;
}

footer p {
  max-width: 800px;
  margin: 0 auto 12px;
}

.reference-section {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 30px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.reference-card {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.reference-card:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.reference-card h4 {
  color: var(--primary-color);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.reference-card p {
  text-align: justify;
  margin-bottom: 12px;
}

.link-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary-light);
  color: var(--primary-color);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 500;
  transition: background-color 0.3s;
}

.link-button:hover {
  background-color: rgba(33, 150, 243, 0.2);
}

@media (max-width: 768px) {
  .content {
    flex-direction: column;
  }

  .vocalization-types {
    grid-template-columns: 1fr;
  }

  .audio-player audio {
    width: 100%;
    margin-right: 0;
    margin-bottom: 5px;
  }
}