* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: #fdfdfd;
}

/* ===== HEADER ===== */
header {
  background-color: #f1f1f1;
  padding: 15px;
  text-align: center;
  border-bottom: 2px solid #ccc;
}

/* ===== NAVIGATION ===== */
ul.topnav {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style-type: none;
  margin: 0;
  padding: 0;
  background-color: #333;
}

ul.topnav li {
  margin: 0 25px;
}

ul.topnav li a {
  display: block;
  color: white;
  padding: 14px 20px;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
  transition: all 0.3s ease;
}

ul.topnav li a:hover {
  background-color: #ddd;
  color: black;
}

ul.topnav li a.active {
  background-color: #f1f1f1;
  color: #333;
}

/* ===== FLEX LAYOUT ===== */
.flex-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  padding: 20px;
}

.column {
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  margin: 10px;
  padding: 20px;
  flex: 1;
  min-width: 250px;
}

/* ===== TEXTAREA STYLE ===== */
textarea {
  width: 100%;
  height: 200px;
  padding: 10px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #ccc;
  resize: vertical;
  outline: none;
  transition: 0.3s;
}

textarea:focus {
  border-color: #0078d4;
  box-shadow: 0 0 5px rgba(0,120,212,0.4);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width:600px) {
  .flex-container {
    flex-direction: column;
  }

  ul.topnav li {
    margin: 5px;
  }
}
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background-color: #fdfdfd;
}

/* ===== HEADER ===== */
header {
  background-color: #f1f1f1;
  padding: 15px;
  text-align: center;
  border-bottom: 2px solid #ccc;
}

/* ===== NAVIGATION BAR ===== */
ul.topnav {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style-type: none;
  margin: 0;
  padding: 0;
  background-color: #333;
  border-bottom-left-radius: 10px;
  border-bottom-right-radius: 10px;
}

ul.topnav li {
  margin: 0;
  flex: 1;
  text-align: center;
}

ul.topnav li a {
  display: block;
  padding: 14px 0;
  color: white;
  text-decoration: none;
  font-weight: bold;
  transition: 0.3s;
  border-radius: 10px 10px 0 0;
}

ul.topnav li a:hover,
ul.topnav li a.active {
  background-color: #f1f1f1;
  color: #333;
}

/* ===== CONTENT AREA ===== */
.tabcontent {
  padding: 20px;
  text-align: left;
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 0 0 10px 10px;
  margin: 0 10%;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

/* ===== TEXTAREA STYLE ===== */
textarea {
  width: 100%;
  height: 200px;
  padding: 10px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #ccc;
  resize: vertical;
  outline: none;
  transition: 0.3s;
}

textarea:focus {
  border-color: #0078d4;
  box-shadow: 0 0 5px rgba(0,120,212,0.4);
}

/* ===== RESPONSIVE ===== */
@media screen and (max-width:600px) {
  ul.topnav {
    flex-direction: column;
  }
  ul.topnav li a {
    border-radius: 0;
  }
  .tabcontent {
    margin: 0 5%;
  }
}