body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f9;
}

/* LAYOUT */
.layout {
  display: flex;
  height: 100vh;
}

/* SIDEBAR */
.sidebar {
  width: 240px;
  background: #1e293b;
  color: white;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

.sidebar img {
  max-width: 160px;
  height: auto;
  display: block;
  margin: 0 auto 20px auto;
}

.sidebar a {
  color: #cbd5e1;
  text-decoration: none;
  padding: 10px;
  border-radius: 6px;
  margin-bottom: 6px;
}

.sidebar a:hover {
  background: #334155;
}

.sidebar a.active {
  background: #3b82f6;
  color: white;
}

/* MAIN */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* HEADER */
.header {
  background: white;
  padding: 16px 20px;
  border-bottom: 1px solid #ddd;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* CONTENT */
.content {
  padding: 20px;
  overflow: auto;
}

/* CARDS */
.card {
  background: white;
  padding: 20px;
  border-radius: 10px;
  border: 1px solid #ddd;
  margin-bottom: 20px;
}

/* TABLE */
table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

th, td {
  padding: 10px;
  border-bottom: 1px solid #eee;
  text-align: left;
}

th {
  background: #f1f5f9;
}

/* BUTTON */
button {
  padding: 6px 10px;
  cursor: pointer;
}

/* STATUS */
.success { color: green; }
.error { color: red; }
.duplicate { color: orange; }