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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  padding: 40px 20px;
}

.layout {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  border-collapse: collapse;
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.layout td {
  padding: 30px;
  vertical-align: top;
}

.title {
  background: #0f2027;
  color: white;
  text-align: center;
}

.title h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

.title p {
  font-size: 18px;
  color: #cccccc;
}

.menu {
  width: 25%;
  background: #f4f4f4;
}

.menu h3 {
  margin-bottom: 15px;
}

.menu ul {
  list-style: none;
}

.menu li {
  padding: 10px 0;
  cursor: pointer;
  transition: 0.3s;
}

.menu li:hover {
  color: #2c5364;
  transform: translateX(6px);
}

.main {
  width: 75%;
}

.main h2 {
  margin-bottom: 15px;
}

.main h3 {
  margin: 20px 0 10px;
}

.main ul {
  padding-left: 20px;
}

.footer {
  background: #eeeeee;
  text-align: center;
  font-size: 14px;
  color: #555;
}

.back {
  text-align: center;
  margin-top: 25px;
}

.back a {
  display: inline-block;
  padding: 10px 20px;
  background: #2c5364;
  color: white;
  text-decoration: none;
  border-radius: 8px;
  transition: 0.3s;
}

.back a:hover {
  background: #203a43;
}

@media (max-width: 768px) {
  .layout,
  .layout tr,
  .layout td {
    display: block;
    width: 100%;
  }

  .menu,
  .main {
    width: 100%;
  }
}