* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif;
}
html,
body {
  height: 100%;
  margin: 0;
}
.teaching-notice {
  background-color: #f1f1f1;
  color: #555;
  font-size: 12px;
  text-align: center;
  padding: 6px 10px;
  border-bottom: 1px solid #ccc;
}

body {
  background-color: #f5f5f5;
  display: flex;
  flex-direction: column;
}

.content-wrapper {
  flex: 1;
}

header {
  background-color: #fff;
  border-bottom: 1px solid #ccc;
}

.navbar {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 10px 0;
  min-height: 80px;
  color: #11457e;
  justify-content: space-between;
}

.logo {
  font-weight: bold;
  margin-right: 40px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 20px;
  font-size: 14px;
}

.nav-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-links li a {
  text-decoration: none;
  color: #11457e;
}
.nav-links li a.active {
  font-weight: bold;
}

.nav-links li a:hover {
  text-decoration: underline;
}

.slider-wrapper {
  background-color: #e6e7eb;
  padding: 20px 0;
}

.slider {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 40px;
  cursor: pointer;
  user-select: none;
}

.slider-arrow.left {
  left: 20px;
}

.slider-arrow.right {
  right: 20px;
}

.slider-image {
  width: 420px;
  height: 260px;
  border: 12px solid #f5f5f5;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-color: #f5f5f5;
}

/* Basit placeholder resmi */
.mountain {
  width: 70%;
  height: 70%;
  border: 6px solid #ddd;
  position: relative;
}

.mountain::before,
.mountain::after {
  content: "";
  position: absolute;
  border-style: solid;
  border-width: 0 0 60px 90px;
  border-color: transparent transparent #ddd transparent;
}

.mountain::before {
  left: 10%;
  bottom: 0;
}

.mountain::after {
  right: 5%;
  bottom: 0;
  border-width: 0 0 40px 60px;
}

.sun {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 5px solid #ddd;
  position: absolute;
  top: 18%;
  right: 18%;
}

/* CONTENT */
.content-wrapper {
  background-color: #fff;
  padding: 40px 0 80px;
}

.content-inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 40px 30px 30px;
  text-align: center;
}

.content-inner h1 {
  margin-bottom: 15px;
  font-size: 28px;
  font-weight: bold;
  color: #11457e;
}

.content-inner p {
  font-size: 14px;
  color: #555;
  margin-bottom: 30px;
}

.columns {
  display: flex;
  gap: 20px;
  margin-top: 10px;
}

.column {
  flex: 1;
  padding-top: 20px;
}

.column h3 {
  font-size: 16px;
  margin-bottom: 10px;
  font-weight: bold;
  color: #11457e;
}

.column p {
  font-size: 13px;
  color: #666;
}

footer {
  background-color: #000;
  color: #fff;
  text-align: center;
  font-size: 12px;
  padding: 12px 0;
  margin-top: 0;
  height: 100px;
}

.hero-image {
  background-color: #e6e7eb;
  padding: 60px 0;
}

.hero-image-inner {
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.hero-image-inner img {
  width: 100%;
  height: auto;
  border: 12px solid #fff;
  object-fit: cover;
}
.authors-section {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #d7141a;
  text-align: center;
}

.authors-section h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.authors-section p {
  font-size: 14px;
  color: #555;
  margin-bottom: 10px;
}

.authors-list {
  list-style: none;
  padding: 0;
}

.authors-list li {
  font-size: 14px;
  font-weight: bold;
}

@media (max-width: 768px) {
  .navbar {
    padding: 10px 15px;
  }
  .columns {
    flex-direction: column;
  }
  .slider-image {
    width: 90%;
  }

  .navbar {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .logo {
    margin-bottom: 10px;
    margin-right: 0;
  }

  .nav-links {
    flex-direction: column;
    gap: 8px;
  }

  .nav-links li a {
    display: block;
  }
}