* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Roboto, Arial, sans-serif;
}

body {
  background: #f0f4f8;
  color: #1e293b;
  font-size: 16px;
  padding-bottom: 80px;
}

.container {
  max-width: 500px;
  margin: 0 auto;
  padding: 16px;
}

h1, h2, h3 {
  margin: 12px 0;
  color: #0f172a;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 18px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

input, select, textarea {
  width: 100%;
  padding: 15px;
  margin: 10px 0 16px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  font-size: 17px;
}

.btn {
  width: 100%;
  padding: 15px;
  border: none;
  border-radius: 10px;
  font-size: 17px;
  font-weight: bold;
  cursor: pointer;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
}
.btn-primary:active {
  background: #1d4ed8;
}

.btn-success {
  background: #16a34a;
  color: #fff;
}
.btn-danger {
  background: #dc2626;
  color: #fff;
}

/* Menu Bawah di HP */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #0f172a;
  display: flex;
  justify-content: space-around;
  padding: 10px 0;
  box-shadow: 0 -2px 8px rgba(0,0,0,0.1);
  z-index: 999;
}

.bottom-nav a {
  color: #cbd5e1;
  text-align: center;
  font-size: 14px;
  text-decoration: none;
  padding: 6px 8px;
  border-radius: 8px;
}

.bottom-nav a.active {
  background: #2563eb;
  color: white;
}

.content-section {
  display: none;
}
.content-section.active {
  display: block;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
table th, table td {
  padding: 12px 8px;
  border-bottom: 1px solid #e2e8f0;
}
table th {
  background: #f1f5f9;
}

.msg {
  padding: 12px;
  border-radius: 8px;
  margin: 10px 0;
}
.success { background: #dcfce7; color: #15803d; }
.error { background: #fee2e2; color: #b91c1c; }