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

body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
  color: #333;
}

.layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  grid-template-rows: auto 1fr auto;
  grid-template-areas:
    "header header"
    "menu content"
    "footer footer";
  min-height: 100vh;
}

.navbar {
  grid-area: header;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 40px;
  background: #0f2027;
  color: white;
}

.nav-left h1 {
  font-size: 28px;
}

.nav-left p {
  font-size: 14px;
  color: #bbb;
}

.nav-right a {
  margin-left: 25px;
  text-decoration: none;
  color: white;
  font-weight: 500;
  transition: 0.3s;
}

.nav-right a:hover {
  color: #00d4ff;
}

.menu {
  grid-area: menu;
  background: #ffffff;
  padding: 30px 20px;
  box-shadow: 4px 0 12px rgba(0, 0, 0, 0.08);
}

.menu ul {
  list-style: none;
}

.menu li {
  padding: 12px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: 0.2s;
}

.menu li:hover {
  background: rgba(0, 0, 0, 0.06);
  transform: translateX(6px);
}

.main {
  grid-area: content;
  padding: 40px;
  background: #f4f7fa;
}

.main h2 {
  margin-bottom: 20px;
}

.main p {
  margin-bottom: 15px;
  line-height: 1.6;
}

.footer {
  grid-area: footer;
  text-align: center;
  padding: 20px;
  background: #0f2027;
  color: #bbb;
  font-size: 14px;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "menu"
      "content"
      "footer";
  }

  .navbar {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }

  .nav-right a {
    margin: 0 10px;
  }

  .menu {
    box-shadow: none;
  }
}