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

body {
  font-family: 'Poppins', sans-serif;
  display: flex;
  height: 100vh;
  background-color: #f4f6f8;
  overflow: hidden;
}

/* Sol menü */
.sidebar {
  width: 240px;
  background: linear-gradient(180deg, #007bff, #00bcd4);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding-top: 20px;
  position: relative;
}

.sidebar .welcome {
  text-align: center;
  margin-bottom: 30px;
  font-size: 16px;
  font-weight: 500;
}

.sidebar ul {
  list-style: none;
  flex: 1;
}

.sidebar ul li {
  padding: 14px 25px;
  cursor: pointer;
  transition: background 0.3s;
}

.sidebar ul li:hover {
  background: rgba(255,255,255,0.2);
}

.sidebar ul li.active {
  background: rgba(255,255,255,0.3);
  font-weight: 600;
}

.sidebar ul li:last-child {
  margin-top: auto;
  background: rgba(0,0,0,0.15);
}

.sidebar ul li:last-child:hover {
  background: rgba(0,0,0,0.25);
}

/* Top bar */
.topbar {
  height: 60px;
  width: 100%;
  background: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 18px;
  font-weight: 600;
  border-bottom: 1px solid #ddd;
  color: #333;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

/* İçerik alanı */
.content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1;
  padding: 25px;
  overflow-y: auto;
}

/* Mobil uyum */
@media (max-width: 768px) {
  .sidebar {
    width: 70px;
  }
  .sidebar ul li {
    text-align: center;
    font-size: 13px;
    padding: 12px 10px;
  }
  .sidebar .welcome {
    display: none;
  }
}