body {
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
      background: #f0f8ff;
      padding-bottom: 70px; /* alt çubuğa yer bırak */
    }

    header {
      background-color: #0077b6;
      color: white;
      padding: 20px;
      text-align: center;
      font-size: 22px;
      font-weight: bold;
    }

    .main-buttons {
      padding: 20px;
    }

    .main-btn {
      background: #f7f8f9;
      color: #000;
      padding: 20px;
      margin: 15px auto;
      display: block;
      width: 80%;
      font-size: 20px;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      transition: 0.2s;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2); /* Butona gölge efekti */
    }

    .main-btn:hover {
      background: #e0e0e0;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.25);
    }

    .bottombar {
      position: fixed;
      bottom: 0;
      width: 100%;
      background: #2c3e50;
      color: white;
      display: flex;
      justify-content: space-around;
      padding: 15px 0;
align-items: center;
      height: 30px;
      box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.1);
      z-index: 1000;
    }

    .bottombar div {
      text-align: center;
      font-size: 14px;
    }

 /* Hamburger icon */
    .hamburger {
      font-size: 30px;
      cursor: pointer;
      padding: 5px 15px;
      position: fixed;
      top: 10px;
      left: 10px;
      z-index: 1001;
      background-color: white;
      border-radius: 5px;
      box-shadow: 0 0 4px rgba(0,0,0,0.3);
    }

/* Sidebar */
.sidebar {
  height: 100%;
  width: 0;
  position: fixed;
  z-index: 1000;
  top: 0;
  left: 0;
  background-color: #222;
  overflow-x: hidden;
  transition: 0.3s;
  padding-top: 60px;
  z-index: 1100;
}

.sidebar a {
  padding: 12px 24px;
  text-decoration: none;
  font-size: 18px;
  color: white;
  display: block;
  transition: 0.2s;
}
.closebtn {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 36px;
  color: white;
  cursor: pointer;
}
.sidebar a:hover {
  background-color: #444;
}
.content {
      padding: 80px 20px 60px 20px;
    }