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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Poppins', sans-serif;
      background-color: #f4fffd;
      color: #12343b;
      line-height: 1.7;
    }

    :root {
      --turquoise: #2ec4b6;
      --light-green: #70c1b3;
      --yellow: #ffd166;
      --deep-blue: #0b3c5d;
      --white: #ffffff;
      --soft-bg: #eefcf9;
    }

    nav {
      position: fixed;
      width: 100%;
      top: 0;
      left: 0;
      background: rgba(11, 60, 93, 0.92);
      backdrop-filter: blur(8px);
      padding: 20px 8%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      z-index: 1000;
    }

    nav h2 {
      color: white;
      font-weight: 600;
      letter-spacing: 1px;
    }

    nav ul {
      display: flex;
      list-style: none;
      gap: 28px;
    }

    nav a {
      text-decoration: none;
      color: white;
      font-size: 0.95rem;
      transition: 0.3s ease;
    }

    nav a:hover {
      color: var(--yellow);
    }

    header {
      height: 100vh;
      background:
        linear-gradient(rgba(0,0,0,0.45), rgba(0,0,0,0.45)),
        url('https://upload.wikimedia.org/wikipedia/commons/6/6d/Uninhabited_island_Cayo_Bolivar.jpg?auto=format&fit=crop&w=1800&q=80');
      background-size: cover;
      background-position: center;
      display: flex;
      justify-content: center;
      align-items: center;
      text-align: center;
      color: white;
      padding: 20px;
    }

    .hero {
      max-width: 850px;
    }

    .hero h1 {
      font-size: 5rem;
      margin-bottom: 20px;
      letter-spacing: 3px;
      font-weight: 700;
    }

    .hero p {
      font-size: 1.2rem;
      margin-bottom: 35px;
    }

    .hero a {
      display: inline-block;
      background: var(--yellow);
      color: var(--deep-blue);
      text-decoration: none;
      padding: 15px 30px;
      border-radius: 50px;
      font-weight: 600;
      transition: 0.3s ease;
    }

    .hero a:hover {
      background: white;
      transform: translateY(-3px);
    }

    section {
      padding: 50px 10%;
    }

    .section-title {
      font-size: 2.8rem;
      margin-bottom: 25px;
      color: var(--deep-blue);
    }

    .section-text {
      max-width: 760px;
      margin-bottom: 30px;
      color: #335c67;
    }

    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 30px;
    }

    .card {
      background: white;
      padding: 35px;
      border-radius: 22px;
      box-shadow: 0 10px 25px rgba(0,0,0,0.08);
      transition: 0.3s ease;
    }

    .card:hover {
      transform: translateY(-8px);
    }

    .card h3 {
      margin-bottom: 15px;
      color: var(--deep-blue);
      font-size: 1.3rem;
    }

    .highlight {
      background: linear-gradient(135deg, var(--turquoise), var(--light-green));
      color: white;
      text-align: center;
      padding: 120px 10%;
    }

    .highlight h2 {
      font-size: 3rem;
      margin-bottom: 20px;
      font-weight: 600;
    }

    .highlight p {
      font-size: 1.4rem;
      font-weight: 300;
    }

    .timeline {
      border-left: 4px solid var(--turquoise);
      padding-left: 35px;
      margin-top: 50px;
    }

    .timeline-item {
      margin-bottom: 40px;
    }

    .timeline-item h4 {
      color: var(--deep-blue);
      margin-bottom: 10px;
      font-size: 1.2rem;
    }

    .example-box {
      background: var(--soft-bg);
      padding: 35px;
      border-radius: 22px;
      margin-top: 50px;
      border-left: 6px solid var(--turquoise);
    }

    .example-box p {
      margin-bottom: 15px;
      font-size: 1.05rem;
    }

    .quiz {
      background: white;
      border-radius: 22px;
      padding: 50px;
      text-align: center;
      box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    }

    .quiz h3 {
      margin-bottom: 30px;
      font-size: 2rem;
      color: var(--deep-blue);
    }

    .quiz button {
      background: var(--turquoise);
      color: white;
      border: none;
      padding: 15px 22px;
      border-radius: 12px;
      margin: 10px;
      cursor: pointer;
      font-size: 1rem;
      transition: 0.3s ease;
    }

    .quiz button:hover {
      background: var(--deep-blue);
    }

    #answer {
      margin-top: 25px;
      font-weight: 600;
      color: var(--deep-blue);
    }

    footer {
      background: var(--deep-blue);
      color: white;
      text-align: center;
      padding: 60px 20px;
    }

    footer p {
      opacity: 0.8;
      margin-top: 10px;
    }

    @media(max-width: 900px) {
      nav ul {
        display: none;
      }

      .hero h1 {
        font-size: 3rem;
      }

      .section-title {
        font-size: 2.2rem;
      }

      .highlight h2 {
        font-size: 2rem;
      }
    }
    .origin {
font-style: italic; 
}
.out {
font-weight: normal;
color: #000000;
line-height: 15px;
}
.ti-0 {
font-weight: bold;
color: #000000;
line-height: 15px;
}

table a:link{
color: #0b3c5d;	
}


a.link:link {
color: #0b3c5d;	
}
a.link:visited {
color: #2ec4b6 ;
}
table {
padding: 0px;
border-spacing: 0px;	
}

iframe {
    display: block;
    border-style:none;
    margin: 10px auto;
}
p {
	margin-bottom: 10px;
}
ul {
	margin-left: 30px;
}

.collapsible {
  background-color: #2ec4b6;
  color: white;
  font-weight: bold;
  cursor: pointer;
  padding: 18px;
  width: 100%;
  border: none;
  text-align: left;
  outline: none;
  font-size: 15px;
}

.collapsible:hover {
  background-color: #ffd166;
  color: #0b3c5d;
}

.content {
  padding: 0 18px;
  display: none;
  overflow: hidden;
}
audio {
	background-color:  #0b3c5d;
	padding: 10px;
	border-radius: 12px;
	margin: 20px 0px 20px 0px;
}
td{
	padding: 2px;
}
div.text{
	border-style: solid;
	border-color: #0b3c5d;
	border-radius: 12px;
	padding: 5px;
	cursor: pointer;
	margin: 15px 0px 15px 0px;
}
div.text:hover{
	background-color: #2ec4b6;
  color: white;
}