:root {
    --primary-color: #007bff;
    --background-color: #55b494;
    --text-color: #333;
    --header-font: 'Arial', sans-serif;
    --body-font: 'Helvetica', sans-serif;
}
body {
    font-family: var(--body-font);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
}
.section {
    padding: 60px 20px;
    text-align: center;
}
h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 40px;
    font-family: var(--header-font);
}
.main-nav {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: #439696;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
}
.main-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
}
.main-nav li a {
    display: block;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: bold;
    transition: color 0.3s ease;
}
.main-nav li a:hover {
    color: var(--primary-color);
}
#hakkimda {
    background-color: #55b494;
}
.bio-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}
.bio-image img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid var(--primary-color);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}
.bio-text {
    max-width: 600px;
    line-height: 1.8;
    font-size: 1.1rem;
    font-weight: 1000;
}
.image-gallery {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}
.image-gallery img {
    max-width: 300px;
    height: auto;
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}
.image-gallery img:hover {
    transform: scale(1.05);
}
.video-container {
  display: flex;
  justify-content: center;
  margin: 20px 0;
}
.video-wrapper {
  position: relative;
  width: 60%; 
  max-width: 500px; 
  aspect-ratio: 16 / 9; 
}
.video-wrapper iframe {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 12px; 
}
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
    font-size: 0.9rem;
}
@media (min-width: 768px) {
    .bio-container {
        flex-direction: row;
        text-align: left;
        max-width: 900px;
        margin: 0 auto;
    }

    .bio-image {
        flex-shrink: 0;
    }

    .bio-text {
        text-align: left;
    }
}