/* Reset dasar */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

/* Header */
.header {
  background: #1e293b;
  color: #fff;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo h1 {
  font-size: 1.2rem;
  font-weight: 600;
}

/* Navigation */
.nav {
  display: flex;
  gap: 1rem;
}

.nav-btn {
  background: transparent;
  border: none;
  color: #fff;
  cursor: pointer;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: background 0.3s;
}

.nav-btn:hover,
.nav-btn.active {
  background: #334155;
}

/* Main */
.main {
  padding: 2rem;
}

.section {
  display: none;
}

.section.active {
  display: block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.section-header h2 {
  font-size: 1.2rem;
  color: #1e293b;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-weight: 500;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-secondary {
  background: #e2e8f0;
  color: #1e293b;
}

.btn-secondary:hover {
  background: #cbd5e1;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: #fff;
  border-radius: 10px;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.stat-icon {
  font-size: 1.5rem;
  color: #2563eb;
}

.stat-info h3 {
  font-size: 1.4rem;
  margin-bottom: 0.2rem;
}

/* Tables */
.table-container {
  overflow-x: auto;
  background: #fff;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
}

.data-table th {
  background: #f1f5f9;
  font-weight: 600;
}

/* Forms & Inputs */
.search-input,
.filter-select,
.modal input,
.modal textarea,
.modal select {
  width: 100%;
  padding: 0.6rem;
  border: