/* ===== Top Navigation ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;

  height: 64px;
  padding: 0 24px;

  background: #020617; /* navy เข้ม */
  border-bottom: 1px solid #1e293b;
}

/* โลโก้ */
.topbar .logo {
  font-size: 18px;
  font-weight: 600;
  white-space: nowrap;
}

.app {
  display: grid;
  grid-template-columns: 360px 1fr;
  height: calc(100vh - 56px);
}

.panel {
  padding: 20px;
  overflow-y: auto;
}

.controls {
  border-right: 1px solid #1e293b;
}

.preview {
  display: flex;
  flex-direction: column;
}

.card {
  background: #020617;
  border: 1px solid #1e293b;
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
}

.card h3 {
  margin: 0 0 12px;
  font-size: 16px;
}

/* เมนูแนวนอน */
.main-menu {
  display: flex;
  gap: 24px;
}

.main-menu a {
  text-decoration: none;
  color: #e5e7eb;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 8px;
  transition: background 0.2s;
}

.main-menu a:hover {
  background: #1e293b;
}